b6307340e8
added caching of SkVertices Docs-Preview: https://skia.org/?cl=138596 Bug: skia: Change-Id: Ia750f55f5f6d0de250d9e9c5619f4d1ac856f9f5 Reviewed-on: https://skia-review.googlesource.com/138596 Reviewed-by: Brian Osman <brianosman@google.com> Reviewed-by: Robert Phillips <robertphillips@google.com> Commit-Queue: Ruiqi Mao <ruiqimao@google.com>
7175 lines
448 KiB
Markdown
7175 lines
448 KiB
Markdown
SkCanvas Reference
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===
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# <a name='Canvas'>Canvas</a>
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# <a name='SkCanvas'>Class SkCanvas</a>
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<a href='#Canvas'>Canvas</a> provides an interface for drawing, and how the drawing is clipped and transformed.
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<a href='#Canvas'>Canvas</a> contains a stack of <a href='#Matrix'>Matrix</a> and <a href='#Clip'>Clip</a> values.
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<a href='#Canvas'>Canvas</a> and <a href='SkPaint_Reference#Paint'>Paint</a> together provide the state to draw into <a href='SkSurface_Reference#Surface'>Surface</a> or <a href='undocumented#Device'>Device</a>.
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Each <a href='#Canvas'>Canvas</a> draw call transforms the geometry of the object by the concatenation of all
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<a href='#Matrix'>Matrix</a> values in the stack. The transformed geometry is clipped by the intersection
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of all of <a href='#Clip'>Clip</a> values in the stack. The <a href='#Canvas'>Canvas</a> draw calls use <a href='SkPaint_Reference#Paint'>Paint</a> to supply drawing
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state such as <a href='SkColor_Reference#Color'>Color</a>, <a href='undocumented#Typeface'>Typeface</a>, text size, stroke width, <a href='undocumented#Shader'>Shader</a> and so on.
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To draw to a pixel-based destination, create <a href='undocumented#Raster_Surface'>Raster Surface</a> or <a href='undocumented#GPU_Surface'>GPU Surface</a>.
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Request <a href='#Canvas'>Canvas</a> from <a href='SkSurface_Reference#Surface'>Surface</a> to obtain the interface to draw.
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<a href='#Canvas'>Canvas</a> generated by <a href='undocumented#Raster_Surface'>Raster Surface</a> draws to memory visible to the CPU.
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<a href='#Canvas'>Canvas</a> generated by <a href='undocumented#GPU_Surface'>GPU Surface</a> uses Vulkan or OpenGL to draw to the GPU.
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To draw to a document, obtain <a href='#Canvas'>Canvas</a> from <a href='undocumented#Canvas'>SVG Canvas</a>, <a href='undocumented#PDF'>Document PDF</a>, or <a href='undocumented#Picture_Recorder'>Picture Recorder</a>.
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<a href='undocumented#Document'>Document</a> based <a href='#Canvas'>Canvas</a> and other <a href='#Canvas'>Canvas</a> <a href='undocumented#Subclasses'>Subclasses</a> reference <a href='undocumented#Device'>Device</a> describing the
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destination.
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<a href='#Canvas'>Canvas</a> can be constructed to draw to <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> without first creating <a href='undocumented#Raster_Surface'>Raster Surface</a>.
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This approach may be deprecated in the future.
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## Overview
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<table style='border-collapse: collapse; width: 62.5em'>
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<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Constant'>Constants</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>enum and enum class, and their const values</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Constructor'>Constructors</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>functions that construct <a href='#SkCanvas'>SkCanvas</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Member_Function'>Functions</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>global and class member functions</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Related_Function'>Related Functions</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>similar member functions grouped together</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Struct'>Struct Declarations</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>embedded struct members</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Typedef'>Typedef Declarations</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>types defined by other types</td>
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</tr>
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</table>
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## <a name='Related_Function'>Related Function</a>
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SkCanvas global, <code>struct</code>, and <code>class</code> related member functions share a topic.
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<table style='border-collapse: collapse; width: 62.5em'>
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<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Clip'>Clip</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>stack of clipping <a href='SkPath_Reference#Path'>Paths</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Draw'>Draw</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws into <a href='#Canvas'>Canvas</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Draw_Image'>Draw Image</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkImage_Reference#Image'>Image</a> to <a href='#Canvas'>Canvas</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Draw_Image_Lattice'>Draw Image Lattice</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>divides <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> or <a href='SkImage_Reference#Image'>Image</a> into a rectangular grid</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Draw_Text'>Draw Text</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text into <a href='#Canvas'>Canvas</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Layer'>Layer</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>temporary <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> to draw into</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Layer_SaveLayerRec'>Layer SaveLayerRec</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>contains the state used to create the <a href='#Layer'>Layer</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Matrix'>Matrix</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>coordinate transformation</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Pixels'>Pixels</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>read and write pixel values</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Property'>Property</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>metrics and attributes</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#State_Stack'>State Stack</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>stack of state for hierarchical drawing</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Utility'>Utility</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>rarely called management functions</td>
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</tr>
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</table>
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## <a name='Constant'>Constant</a>
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SkCanvas related constants are defined by <code>enum</code>, <code>enum class</code>, <code>#define</code>, <code>const</code>, and <code>constexpr</code>.
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<table style='border-collapse: collapse; width: 62.5em'>
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<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_ColorBehavior_kLegacy'>ColorBehavior::kLegacy</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>placeholder</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_ColorBehavior'>ColorBehavior</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>exists for Android framework only</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_PointMode'>PointMode</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>sets <a href='#SkCanvas_drawPoints'>drawPoints</a> options</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_SaveLayerFlagsSet'>SaveLayerFlagsSet</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>sets <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a> options</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>sets <a href='#SkCanvas_drawImageRect'>drawImageRect</a> options</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>sample outside bounds; faster</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_kInitWithPrevious_SaveLayerFlag'>kInitWithPrevious SaveLayerFlag</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>initializes with previous contents</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_kLines_PointMode'>kLines PointMode</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draw each pair of points as a line segment</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_kPoints_PointMode'>kPoints PointMode</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draw each point separately</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_kPolygon_PointMode'>kPolygon PointMode</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draw the array of points as a open polygon</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_kPreserveLCDText_SaveLayerFlag'>kPreserveLCDText SaveLayerFlag</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates <a href='#Layer'>Layer</a> for LCD text</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>sample only inside bounds; slower</td>
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</tr>
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</table>
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## <a name='Struct'>Struct</a>
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SkCanvas uses C++ structs to declare the public data structures and interfaces.
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<table style='border-collapse: collapse; width: 62.5em'>
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<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_Lattice'>Lattice</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>divides <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> or <a href='SkImage_Reference#Image'>Image</a> into a rectangular grid</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>contains the state used to create the <a href='#Layer'>Layer</a></td>
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</tr>
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</table>
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## <a name='Typedef'>Typedef</a>
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SkCanvas <code>typedef</code> define a data type.
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<table style='border-collapse: collapse; width: 62.5em'>
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<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_SaveLayerFlags'>SaveLayerFlags</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>options for <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a></td>
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</tr>
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</table>
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## <a name='Constructor'>Constructor</a>
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Create the desired type of <a href='SkSurface_Reference#Surface'>Surface</a> to obtain its <a href='#Canvas'>Canvas</a> when possible. Useful
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when no <a href='SkSurface_Reference#Surface'>Surface</a> is required, and some helpers implicitly create <a href='undocumented#Raster_Surface'>Raster Surface</a>.
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SkCanvas can be constructed or initialized by these functions, including C++ class constructors.
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<table style='border-collapse: collapse; width: 62.5em'>
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<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates from <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> and <a href='undocumented#Storage'>Pixel Storage</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_MakeRasterDirectN32'>MakeRasterDirectN32</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates from image data and <a href='undocumented#Storage'>Pixel Storage</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_empty_constructor'>SkCanvas()</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates with no <a href='SkSurface_Reference#Surface'>Surface</a>, no dimensions</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_copy_const_SkBitmap'>SkCanvas(const SkBitmap& bitmap)</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>uses existing <a href='SkBitmap_Reference#Bitmap'>Bitmap</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_const_SkBitmap'>SkCanvas(const SkBitmap& bitmap, ColorBehavior behavior)</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>exists for Android framework only</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_const_SkBitmap_const_SkSurfaceProps'>SkCanvas(const SkBitmap& bitmap, const SkSurfaceProps& props)</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>uses existing <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> and <a href='undocumented#Surface_Properties'>Surface Properties</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_int_int_const_SkSurfaceProps_star'>SkCanvas(int width, int height, const SkSurfaceProps* props = nullptr)</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates with no <a href='SkSurface_Reference#Surface'>Surface</a>, set dimensions, <a href='undocumented#Surface_Properties'>Surface Properties</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_makeSurface'>makeSurface</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates <a href='SkSurface_Reference#Surface'>Surface</a> matching <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> and <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_destructor'>~SkCanvas()</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws saved <a href='#Layer'>Layers</a>, frees resources</td>
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</tr>
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</table>
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## <a name='Member_Function'>Member Function</a>
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SkCanvas member functions read and modify the structure properties.
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<table style='border-collapse: collapse; width: 62.5em'>
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<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates from <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> and <a href='undocumented#Storage'>Pixel Storage</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_MakeRasterDirectN32'>MakeRasterDirectN32</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates from image data and <a href='undocumented#Storage'>Pixel Storage</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_accessTopLayerPixels'>accessTopLayerPixels</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns writable pixel access if available</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_accessTopRasterHandle'>accessTopRasterHandle</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns context that tracks <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_androidFramework_setDeviceClipRestriction'>androidFramework setDeviceClipRestriction</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>exists for use by Android framework</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_clear'>clear</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>fills <a href='#Clip'>Clip</a> with <a href='SkColor_Reference#Color'>Color</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_clipPath'>clipPath</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>combines <a href='#Clip'>Clip</a> with <a href='SkPath_Reference#Path'>Path</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_clipRRect'>clipRRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>combines <a href='#Clip'>Clip</a> with <a href='SkRRect_Reference#RRect'>Round Rect</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_clipRect'>clipRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>combines <a href='#Clip'>Clip</a> with <a href='SkRect_Reference#Rect'>Rect</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_clipRegion'>clipRegion</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>combines <a href='#Clip'>Clip</a> with <a href='undocumented#Region'>Region</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_concat'>concat</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>multiplies <a href='#Matrix'>Matrix</a> by <a href='#Matrix'>Matrix</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_discard'>discard</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>makes <a href='#Canvas'>Canvas</a> contents undefined</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAnnotation'>drawAnnotation</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>associates a <a href='SkRect_Reference#Rect'>Rect</a> with a key-value pair</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawArc'>drawArc</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Arc'>Arc</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAtlas'>drawAtlas</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws sprites using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawBitmap'>drawBitmap</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> at (x, y) position</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws proportionally stretched <a href='SkBitmap_Reference#Bitmap'>Bitmap</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Nine_Patch'>Nine Patch</a> <a href='SkBitmap_Reference#Bitmap'>Bitmap</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawBitmapRect'>drawBitmapRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkBitmap_Reference#Bitmap'>Bitmap</a>, source <a href='SkRect_Reference#Rect'>Rect</a> to destination <a href='SkRect_Reference#Rect'>Rect</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawCircle'>drawCircle</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Circle'>Circle</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawColor'>drawColor</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>fills <a href='#Clip'>Clip</a> with <a href='SkColor_Reference#Color'>Color</a> and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawDRRect'>drawDRRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws double <a href='SkRRect_Reference#RRect'>Round Rect</a> stroked or filled</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawDrawable'>drawDrawable</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Drawable'>Drawable</a>, encapsulated drawing commands</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawIRect'>drawIRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkIRect_Reference#IRect'>IRect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawImage'>drawImage</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkImage_Reference#Image'>Image</a> at (x, y) position</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawImageLattice'>drawImageLattice</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws proportionally stretched <a href='SkImage_Reference#Image'>Image</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawImageNine'>drawImageNine</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Nine_Patch'>Nine Patch</a> <a href='SkImage_Reference#Image'>Image</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawImageRect'>drawImageRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkImage_Reference#Image'>Image</a>, source <a href='SkRect_Reference#Rect'>Rect</a> to destination <a href='SkRect_Reference#Rect'>Rect</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawLine'>drawLine</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws line segment between two points</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawOval'>drawOval</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Oval'>Oval</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPaint'>drawPaint</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>fills <a href='#Clip'>Clip</a> with <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPatch'>drawPatch</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Coons_Patch'>Coons Patch</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPath'>drawPath</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkPath_Reference#Path'>Path</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPicture'>drawPicture</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkPicture_Reference#Picture'>Picture</a> using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPoint'>drawPoint</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws point at (x, y) position</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPoints'>drawPoints</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws array as points, lines, polygon</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPosText'>drawPosText</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text at array of (x, y) positions</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPosTextH'>drawPosTextH</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text at x positions with common baseline</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRRect'>drawRRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkRRect_Reference#RRect'>Round Rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRect'>drawRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkRect_Reference#Rect'>Rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRegion'>drawRegion</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Region'>Region</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRoundRect'>drawRoundRect</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkRRect_Reference#RRect'>Round Rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawString'>drawString</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws null terminated string at (x, y) using font advance</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawText'>drawText</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text at (x, y), using font advance</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextBlob'>drawTextBlob</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text with arrays of positions and <a href='SkPaint_Reference#Paint'>Paint</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text following <a href='SkPath_Reference#Path'>Path</a> contour</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextOnPathHV'>drawTextOnPathHV</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text following <a href='SkPath_Reference#Path'>Path</a> with offsets</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text with array of <a href='undocumented#RSXform'>RSXform</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawVertices'>drawVertices</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Vertices'>Vertices</a>, a triangle mesh</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_flush'>flush</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>triggers execution of all pending draw operations</td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getBaseLayerSize'>getBaseLayerSize</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns size of base <a href='#Layer'>Layer</a> in global coordinates</td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns <a href='SkIRect_Reference#IRect'>IRect</a> bounds of <a href='#Clip'>Clip</a></td>
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</tr>
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<tr style='background-color: #f0f0f0; '>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getGrContext'>getGrContext</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns <a href='undocumented#GPU_Context'>GPU Context</a> of the <a href='undocumented#GPU_Surface'>GPU Surface</a></td>
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</tr>
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<tr>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns <a href='#Clip'>Clip</a> bounds in source coordinates</td>
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</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getMetaData'>getMetaData</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>associates additional data with the canvas</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getProps'>getProps</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>copies <a href='undocumented#Surface_Properties'>Surface Properties</a> if available</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getSaveCount'>getSaveCount</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns depth of stack containing <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getTotalMatrix'>getTotalMatrix</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_imageInfo'>imageInfo</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns <a href='SkImageInfo_Reference#Image_Info'>Image Info</a> for <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_isClipEmpty'>isClipEmpty</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns if <a href='#Clip'>Clip</a> is empty</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_isClipRect'>isClipRect</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns if <a href='#Clip'>Clip</a> is <a href='SkRect_Reference#Rect'>Rect</a> and not empty</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_makeSurface'>makeSurface</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>creates <a href='SkSurface_Reference#Surface'>Surface</a> matching <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> and <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_peekPixels'>peekPixels</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns if <a href='#Canvas'>Canvas</a> has direct access to its pixels</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_quickReject'>quickReject</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns if <a href='SkRect_Reference#Rect'>Rect</a> is outside <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_readPixels'>readPixels</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>copies and converts rectangle of pixels from <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_resetMatrix'>resetMatrix</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>resets <a href='#Matrix'>Matrix</a> to identity</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_restore'>restore</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>restores changes to <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>, pops save stack</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_restoreToCount'>restoreToCount</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>restores changes to <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a> to given depth</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_rotate'>rotate</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>rotates <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_save'>save</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>saves <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a> on stack</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_saveLayer'>saveLayer</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>saves <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a> on stack; creates <a href='#Layer'>Layer</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>saves <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a> on stack; creates <a href='#Layer'>Layer</a>; sets opacity</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>saves <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a> on stack; creates <a href='#Layer'>Layer</a> for LCD text</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_scale'>scale</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>scales <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_setMatrix'>setMatrix</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>sets <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_skew'>skew</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>skews <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_translate'>translate</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>translates <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_writePixels'>writePixels</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>copies and converts rectangle of pixels to <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_MakeRasterDirect'></a>
|
|
## MakeRasterDirect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static std::unique_ptr<<a href='#SkCanvas'>SkCanvas</a>> <a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a>(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& info, void* pixels,
|
|
size_t rowBytes,
|
|
const <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a>* props = nullptr)
|
|
</pre>
|
|
|
|
Allocates raster <a href='#Canvas'>Canvas</a> that will draw directly into <a href='#SkCanvas_MakeRasterDirect_pixels'>pixels</a>.
|
|
|
|
<a href='#Canvas'>Canvas</a> is returned if all parameters are valid.
|
|
Valid parameters include:
|
|
<a href='#SkCanvas_MakeRasterDirect_info'>info</a> dimensions are zero or positive;
|
|
<a href='#SkCanvas_MakeRasterDirect_info'>info</a> contains <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a> supported by <a href='undocumented#Raster_Surface'>Raster Surface</a>;
|
|
<a href='#SkCanvas_MakeRasterDirect_pixels'>pixels</a> is not nullptr;
|
|
<a href='#SkCanvas_MakeRasterDirect_rowBytes'>rowBytes</a> is zero or large enough to contain <a href='#SkCanvas_MakeRasterDirect_info'>info</a> width <a href='#SkCanvas_MakeRasterDirect_pixels'>pixels</a> of <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>.
|
|
|
|
Pass zero for <a href='#SkCanvas_MakeRasterDirect_rowBytes'>rowBytes</a> to compute <a href='#SkCanvas_MakeRasterDirect_rowBytes'>rowBytes</a> from <a href='#SkCanvas_MakeRasterDirect_info'>info</a> width and size of pixel.
|
|
If <a href='#SkCanvas_MakeRasterDirect_rowBytes'>rowBytes</a> is greater than zero, it must be equal to or greater than
|
|
<a href='#SkCanvas_MakeRasterDirect_info'>info</a> width times bytes required for <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>.
|
|
|
|
<a href='undocumented#Pixel'>Pixel</a> buffer size should be <a href='#SkCanvas_MakeRasterDirect_info'>info</a> height times computed <a href='#SkCanvas_MakeRasterDirect_rowBytes'>rowBytes</a>.
|
|
<a href='#Pixels'>Pixels</a> are not initialized.
|
|
To access <a href='#SkCanvas_MakeRasterDirect_pixels'>pixels</a> after drawing, call <a href='#SkCanvas_flush'>flush</a> or <a href='#SkCanvas_peekPixels'>peekPixels</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_MakeRasterDirect_info'><code><strong>info</strong></code></a></td>
|
|
<td>width, height, <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>, <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>, <a href='undocumented#Color_Space'>Color Space</a>, of <a href='undocumented#Raster_Surface'>Raster Surface</a>;
|
|
width, or height, or both, may be zero</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_MakeRasterDirect_pixels'><code><strong>pixels</strong></code></a></td>
|
|
<td>pointer to destination <a href='#SkCanvas_MakeRasterDirect_pixels'>pixels</a> buffer</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_MakeRasterDirect_rowBytes'><code><strong>rowBytes</strong></code></a></td>
|
|
<td>interval from one <a href='SkSurface_Reference#Surface'>Surface</a> row to the next, or zero</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_MakeRasterDirect_props'><code><strong>props</strong></code></a></td>
|
|
<td>LCD striping orientation and setting for device independent fonts;
|
|
may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#Canvas'>Canvas</a> if all parameters are valid; otherwise, nullptr
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="525285073aae7e53eb8f454a398f880c"><div>Allocates a three by three bitmap, clears it to white, and draws a black pixel
|
|
in the center.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
---
|
|
-x-
|
|
---
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_MakeRasterDirectN32'>MakeRasterDirectN32</a> <a href='SkSurface_Reference#SkSurface_MakeRasterDirect'>SkSurface::MakeRasterDirect</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_MakeRasterDirectN32'></a>
|
|
## MakeRasterDirectN32
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static std::unique_ptr<<a href='#SkCanvas'>SkCanvas</a>> <a href='#SkCanvas_MakeRasterDirectN32'>MakeRasterDirectN32</a>(int width, int height, <a href='SkColor_Reference#SkPMColor'>SkPMColor</a>* pixels,
|
|
size_t rowBytes)
|
|
</pre>
|
|
|
|
Allocates raster <a href='#Canvas'>Canvas</a> specified by inline image specification. Subsequent <a href='#Canvas'>Canvas</a>
|
|
calls draw into <a href='#SkCanvas_MakeRasterDirectN32_pixels'>pixels</a>.
|
|
<a href='SkImageInfo_Reference#Color_Type'>Color Type</a> is set to <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a>.
|
|
<a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a> is set to <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>.
|
|
To access <a href='#SkCanvas_MakeRasterDirectN32_pixels'>pixels</a> after drawing, call <a href='#SkCanvas_flush'>flush</a> or <a href='#SkCanvas_peekPixels'>peekPixels</a>.
|
|
|
|
<a href='#Canvas'>Canvas</a> is returned if all parameters are valid.
|
|
Valid parameters include:
|
|
<a href='#SkCanvas_MakeRasterDirectN32_width'>width</a> and <a href='#SkCanvas_MakeRasterDirectN32_height'>height</a> are zero or positive;
|
|
<a href='#SkCanvas_MakeRasterDirectN32_pixels'>pixels</a> is not nullptr;
|
|
<a href='#SkCanvas_MakeRasterDirectN32_rowBytes'>rowBytes</a> is zero or large enough to contain <a href='#SkCanvas_MakeRasterDirectN32_width'>width</a> <a href='#SkCanvas_MakeRasterDirectN32_pixels'>pixels</a> of <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a>.
|
|
|
|
Pass zero for <a href='#SkCanvas_MakeRasterDirectN32_rowBytes'>rowBytes</a> to compute <a href='#SkCanvas_MakeRasterDirectN32_rowBytes'>rowBytes</a> from <a href='#SkCanvas_MakeRasterDirectN32_width'>width</a> and size of pixel.
|
|
If <a href='#SkCanvas_MakeRasterDirectN32_rowBytes'>rowBytes</a> is greater than zero, it must be equal to or greater than
|
|
<a href='#SkCanvas_MakeRasterDirectN32_width'>width</a> times bytes required for <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>.
|
|
|
|
<a href='undocumented#Pixel'>Pixel</a> buffer size should be <a href='#SkCanvas_MakeRasterDirectN32_height'>height</a> times <a href='#SkCanvas_MakeRasterDirectN32_rowBytes'>rowBytes</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_MakeRasterDirectN32_width'><code><strong>width</strong></code></a></td>
|
|
<td>pixel column count on <a href='undocumented#Raster_Surface'>Raster Surface</a> created; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_MakeRasterDirectN32_height'><code><strong>height</strong></code></a></td>
|
|
<td>pixel row count on <a href='undocumented#Raster_Surface'>Raster Surface</a> created; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_MakeRasterDirectN32_pixels'><code><strong>pixels</strong></code></a></td>
|
|
<td>pointer to destination <a href='#SkCanvas_MakeRasterDirectN32_pixels'>pixels</a> buffer; buffer size should be <a href='#SkCanvas_MakeRasterDirectN32_height'>height</a>
|
|
times <a href='#SkCanvas_MakeRasterDirectN32_rowBytes'>rowBytes</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_MakeRasterDirectN32_rowBytes'><code><strong>rowBytes</strong></code></a></td>
|
|
<td>interval from one <a href='SkSurface_Reference#Surface'>Surface</a> row to the next, or zero</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#Canvas'>Canvas</a> if all parameters are valid; otherwise, nullptr
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4cacf302830e644234d522f6e2f8f580"><div>Allocates a three by three bitmap, clears it to white, and draws a black pixel
|
|
in the center.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
---
|
|
-x-
|
|
---
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a> <a href='SkSurface_Reference#SkSurface_MakeRasterDirect'>SkSurface::MakeRasterDirect</a> <a href='SkImageInfo_Reference#SkImageInfo_MakeN32Premul'>SkImageInfo::MakeN32Premul</a><sup><a href='SkImageInfo_Reference#SkImageInfo_MakeN32Premul_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_empty_constructor'></a>
|
|
## SkCanvas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas'>SkCanvas</a>()
|
|
</pre>
|
|
|
|
Creates an empty <a href='#Canvas'>Canvas</a> with no backing device or pixels, with
|
|
a width and height of zero.
|
|
|
|
### Return Value
|
|
|
|
empty <a href='#Canvas'>Canvas</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="903451d6c93bf69e2833747a3e8cc8f7"><div>Passes a placeholder to a function that requires one.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
paint draws text left to right
|
|
paint draws text top to bottom
|
|
paint draws text top to bottom
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a> <a href='undocumented#SkRasterHandleAllocator_MakeCanvas'>SkRasterHandleAllocator::MakeCanvas</a> <a href='SkSurface_Reference#SkSurface_getCanvas'>SkSurface::getCanvas</a> <a href='undocumented#SkCreateColorSpaceXformCanvas'>SkCreateColorSpaceXformCanvas</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_int_int_const_SkSurfaceProps_star'></a>
|
|
## SkCanvas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas'>SkCanvas</a>(int width, int height, const <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a>* props = nullptr)
|
|
</pre>
|
|
|
|
Creates <a href='#Canvas'>Canvas</a> of the specified dimensions without a <a href='SkSurface_Reference#Surface'>Surface</a>.
|
|
Used by <a href='undocumented#Subclasses'>Subclasses</a> with custom implementations for draw member functions.
|
|
|
|
If <a href='#SkCanvas_int_int_const_SkSurfaceProps_star_props'>props</a> equals nullptr, <a href='undocumented#Surface_Properties'>Surface Properties</a> are created with
|
|
<a href='undocumented#Legacy_Font_Host'>Surface Properties Legacy Font Host</a> settings, which choose the pixel striping
|
|
direction and order. Since a platform may dynamically change its direction when
|
|
the device is rotated, and since a platform may have multiple monitors with
|
|
different characteristics, it is best not to rely on this legacy behavior.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_int_int_const_SkSurfaceProps_star_width'><code><strong>width</strong></code></a></td>
|
|
<td>zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_int_int_const_SkSurfaceProps_star_height'><code><strong>height</strong></code></a></td>
|
|
<td>zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_int_int_const_SkSurfaceProps_star_props'><code><strong>props</strong></code></a></td>
|
|
<td>LCD striping orientation and setting for device independent fonts;
|
|
may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#Canvas'>Canvas</a> placeholder with dimensions
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="ce6a5ef2df447970b4453489d9d67930">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
canvas is empty
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a> <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a> <a href='undocumented#SkPixelGeometry'>SkPixelGeometry</a> <a href='undocumented#SkCreateColorSpaceXformCanvas'>SkCreateColorSpaceXformCanvas</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_copy_SkBaseDevice'></a>
|
|
## SkCanvas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
explicit <a href='#SkCanvas'>SkCanvas</a>(<a href='undocumented#sk_sp'>sk sp</a><<a href='undocumented#SkBaseDevice'>SkBaseDevice</a>> device)
|
|
</pre>
|
|
|
|
Deprecated.
|
|
|
|
soon
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_copy_const_SkBitmap'></a>
|
|
## SkCanvas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
explicit <a href='#SkCanvas'>SkCanvas</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap)
|
|
</pre>
|
|
|
|
Construct a canvas that draws into <a href='#SkCanvas_copy_const_SkBitmap_bitmap'>bitmap</a>.
|
|
Sets <a href='undocumented#SkSurfaceProps_kLegacyFontHost_InitType'>SkSurfaceProps::kLegacyFontHost InitType</a> in constructed <a href='SkSurface_Reference#Surface'>Surface</a>.
|
|
|
|
<a href='SkBitmap_Reference#Bitmap'>Bitmap</a> is copied so that subsequently editing <a href='#SkCanvas_copy_const_SkBitmap_bitmap'>bitmap</a> will not affect
|
|
constructed <a href='#Canvas'>Canvas</a>.
|
|
|
|
May be deprecated in the future.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_copy_const_SkBitmap_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td>width, height, <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>, <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>, and pixel
|
|
storage of <a href='undocumented#Raster_Surface'>Raster Surface</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#Canvas'>Canvas</a> that can be used to draw into <a href='#SkCanvas_copy_const_SkBitmap_bitmap'>bitmap</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="dd92db963af190e849894038f39b598a"><div>The actual output depends on the installed fonts.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
-----
|
|
---x-
|
|
---x-
|
|
---x-
|
|
---x-
|
|
---x-
|
|
---x-
|
|
-----
|
|
---x-
|
|
---x-
|
|
-----
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a> <a href='undocumented#SkRasterHandleAllocator_MakeCanvas'>SkRasterHandleAllocator::MakeCanvas</a> <a href='SkSurface_Reference#SkSurface_getCanvas'>SkSurface::getCanvas</a> <a href='undocumented#SkCreateColorSpaceXformCanvas'>SkCreateColorSpaceXformCanvas</a>
|
|
|
|
---
|
|
|
|
## <a name='SkCanvas_ColorBehavior'>Enum SkCanvas::ColorBehavior</a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
enum class <a href='#SkCanvas_ColorBehavior'>ColorBehavior</a> {
|
|
<a href='#SkCanvas_ColorBehavior_kLegacy'>kLegacy</a>,
|
|
};
|
|
</pre>
|
|
|
|
### Constants
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
|
|
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_ColorBehavior_kLegacy'><code>SkCanvas::ColorBehavior::kLegacy</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Is a placeholder to allow specialized constructor; has no meaning.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_const_SkBitmap'></a>
|
|
## SkCanvas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas'>SkCanvas</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, <a href='#SkCanvas_ColorBehavior'>ColorBehavior</a> behavior)
|
|
</pre>
|
|
|
|
Android framework only.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_const_SkBitmap_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td>specifies a <a href='#SkCanvas_const_SkBitmap_bitmap'>bitmap</a> for the canvas to draw into</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkBitmap_behavior'><code><strong>behavior</strong></code></a></td>
|
|
<td>specializes this constructor; value is unused</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#Canvas'>Canvas</a> that can be used to draw into <a href='#SkCanvas_const_SkBitmap_bitmap'>bitmap</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_const_SkBitmap_const_SkSurfaceProps'></a>
|
|
## SkCanvas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas'>SkCanvas</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, const <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a>& props)
|
|
</pre>
|
|
|
|
Construct a canvas that draws into <a href='#SkCanvas_const_SkBitmap_const_SkSurfaceProps_bitmap'>bitmap</a>.
|
|
Use <a href='#SkCanvas_const_SkBitmap_const_SkSurfaceProps_props'>props</a> to match the device characteristics, like LCD striping.
|
|
|
|
<a href='#SkCanvas_const_SkBitmap_const_SkSurfaceProps_bitmap'>bitmap</a> is copied so that subsequently editing <a href='#SkCanvas_const_SkBitmap_const_SkSurfaceProps_bitmap'>bitmap</a> will not affect
|
|
constructed <a href='#Canvas'>Canvas</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_const_SkBitmap_const_SkSurfaceProps_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td>width, height, <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>, <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>,
|
|
and pixel storage of <a href='undocumented#Raster_Surface'>Raster Surface</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkBitmap_const_SkSurfaceProps_props'><code><strong>props</strong></code></a></td>
|
|
<td>order and orientation of RGB striping; and whether to use
|
|
device independent fonts</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#Canvas'>Canvas</a> that can be used to draw into <a href='#SkCanvas_const_SkBitmap_const_SkSurfaceProps_bitmap'>bitmap</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="c26cfae4c42cb445240335cc12a50235"><div>The actual output depends on the installed fonts.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
-----
|
|
---x-
|
|
---x-
|
|
---x-
|
|
---x-
|
|
---x-
|
|
---x-
|
|
-----
|
|
---x-
|
|
---x-
|
|
-----
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a> <a href='undocumented#SkRasterHandleAllocator_MakeCanvas'>SkRasterHandleAllocator::MakeCanvas</a> <a href='SkSurface_Reference#SkSurface_getCanvas'>SkSurface::getCanvas</a> <a href='undocumented#SkCreateColorSpaceXformCanvas'>SkCreateColorSpaceXformCanvas</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_destructor'></a>
|
|
## ~SkCanvas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
virtual <a href='#SkCanvas_destructor'>~SkCanvas</a>()
|
|
</pre>
|
|
|
|
Draws saved <a href='#Layer'>Layers</a>, if any.
|
|
Frees up resources used by <a href='#Canvas'>Canvas</a>.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="b7bc91ff16c9b9351b2a127f35394b82"><div><a href='#Canvas'>Canvas</a> <a href='#Layer'>Layer</a> draws into bitmap. <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> sets up an additional
|
|
drawing surface that blends with the bitmap. When <a href='#Layer'>Layer</a> goes out of
|
|
scope, <a href='#Layer'>Layer</a> <a href='undocumented#Destructor'>Destructor</a> is called. The saved <a href='#Layer'>Layer</a> is restored, drawing
|
|
transparent letters.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#State_Stack'>State Stack</a>
|
|
|
|
---
|
|
|
|
## <a name='Property'>Property</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getBaseLayerSize'>getBaseLayerSize</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns size of base <a href='#Layer'>Layer</a> in global coordinates</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getGrContext'>getGrContext</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns <a href='undocumented#GPU_Context'>GPU Context</a> of the <a href='undocumented#GPU_Surface'>GPU Surface</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getMetaData'>getMetaData</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>associates additional data with the canvas</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_getProps'>getProps</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>copies <a href='undocumented#Surface_Properties'>Surface Properties</a> if available</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_imageInfo'>imageInfo</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns <a href='SkImageInfo_Reference#Image_Info'>Image Info</a> for <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_isClipEmpty'>isClipEmpty</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns if <a href='#Clip'>Clip</a> is empty</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_isClipRect'>isClipRect</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns if <a href='#Clip'>Clip</a> is <a href='SkRect_Reference#Rect'>Rect</a> and not empty</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_getMetaData'></a>
|
|
## getMetaData
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='undocumented#SkMetaData'>SkMetaData</a>& <a href='#SkCanvas_getMetaData'>getMetaData</a>()
|
|
</pre>
|
|
|
|
Returns storage to associate additional data with the canvas.
|
|
The storage is freed when <a href='#Canvas'>Canvas</a> is deleted.
|
|
|
|
### Return Value
|
|
|
|
storage that can be read from and written to
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1598396056045e8d0c583b748293d652">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
before: (null)
|
|
during: Hello!
|
|
after: (null)
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='undocumented#SkMetaData'>SkMetaData</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_imageInfo'></a>
|
|
## imageInfo
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkCanvas_imageInfo'>imageInfo</a>() const
|
|
</pre>
|
|
|
|
Returns <a href='SkImageInfo_Reference#Image_Info'>Image Info</a> for <a href='#Canvas'>Canvas</a>. If <a href='#Canvas'>Canvas</a> is not associated with <a href='undocumented#Raster_Surface'>Raster Surface</a> or
|
|
<a href='undocumented#GPU_Surface'>GPU Surface</a>, returned <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> is set to <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>.
|
|
|
|
### Return Value
|
|
|
|
dimensions and <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> of <a href='#Canvas'>Canvas</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="d93389d971f8084c4ccc7a66e4e157ee">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
emptyInfo == canvasInfo
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkCanvas_MakeRasterDirect'>MakeRasterDirect</a> <a href='#SkCanvas_makeSurface'>makeSurface</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getProps'></a>
|
|
## getProps
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_getProps'>getProps</a>(<a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a>* props) const
|
|
</pre>
|
|
|
|
If <a href='#Canvas'>Canvas</a> is associated with <a href='undocumented#Raster_Surface'>Raster Surface</a> or
|
|
<a href='undocumented#GPU_Surface'>GPU Surface</a>, copies <a href='undocumented#Surface_Properties'>Surface Properties</a> and returns true. Otherwise,
|
|
return false and leave <a href='#SkCanvas_getProps_props'>props</a> unchanged.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_getProps_props'><code><strong>props</strong></code></a></td>
|
|
<td>storage for writable <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='undocumented#Surface_Properties'>Surface Properties</a> was copied
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="0fbf2dedc2619bbfbf173c9e3bc1a508">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
isRGB:0
|
|
isRGB:1
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a> <a href='#SkCanvas_makeSurface'>makeSurface</a>
|
|
|
|
---
|
|
|
|
## <a name='Utility'>Utility</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_accessTopLayerPixels'>accessTopLayerPixels</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns writable pixel access if available</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_accessTopRasterHandle'>accessTopRasterHandle</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns context that tracks <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_discard'>discard</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>makes <a href='#Canvas'>Canvas</a> contents undefined</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_flush'>flush</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>triggers execution of all pending draw operations</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_flush'></a>
|
|
## flush
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_flush'>flush</a>()
|
|
</pre>
|
|
|
|
Triggers the immediate execution of all pending draw operations.
|
|
If <a href='#Canvas'>Canvas</a> is associated with <a href='undocumented#GPU_Surface'>GPU Surface</a>, resolves all pending GPU operations.
|
|
If <a href='#Canvas'>Canvas</a> is associated with <a href='undocumented#Raster_Surface'>Raster Surface</a>, has no effect; raster draw
|
|
operations are never deferred.
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_peekPixels'>peekPixels</a> <a href='SkSurface_Reference#SkSurface_flush'>SkSurface::flush()</a> <a href='undocumented#GrContext_flush'>GrContext::flush()</a> <a href='SkSurface_Reference#SkSurface_prepareForExternalIO'>SkSurface::prepareForExternalIO</a> GrContext::abandonContext()
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getBaseLayerSize'></a>
|
|
## getBaseLayerSize
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
virtual <a href='undocumented#SkISize'>SkISize</a> <a href='#SkCanvas_getBaseLayerSize'>getBaseLayerSize</a>() const
|
|
</pre>
|
|
|
|
Gets the size of the base or root <a href='#Layer'>Layer</a> in global canvas coordinates. The
|
|
origin of the base <a href='#Layer'>Layer</a> is always (0,0). The area available for drawing may be
|
|
smaller (due to clipping or <a href='#SkCanvas_saveLayer'>saveLayer</a>).
|
|
|
|
### Return Value
|
|
|
|
integral width and height of base <a href='#Layer'>Layer</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="374e245d91cd729eca48fd20e631fdf3">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
clip=10,30
|
|
size=20,30
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a><sup><a href='#SkCanvas_getDeviceClipBounds_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_makeSurface'></a>
|
|
## makeSurface
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='undocumented#sk_sp'>sk sp</a><<a href='SkSurface_Reference#SkSurface'>SkSurface</a>> <a href='#SkCanvas_makeSurface'>makeSurface</a>(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& info, const <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a>* props = nullptr)
|
|
</pre>
|
|
|
|
Creates <a href='SkSurface_Reference#Surface'>Surface</a> matching <a href='#SkCanvas_makeSurface_info'>info</a> and <a href='#SkCanvas_makeSurface_props'>props</a>, and associates it with <a href='#Canvas'>Canvas</a>.
|
|
Returns nullptr if no match found.
|
|
|
|
If <a href='#SkCanvas_makeSurface_props'>props</a> is nullptr, matches <a href='undocumented#Surface_Properties'>Surface Properties</a> in <a href='#Canvas'>Canvas</a>. If <a href='#SkCanvas_makeSurface_props'>props</a> is nullptr and <a href='#Canvas'>Canvas</a>
|
|
does not have <a href='undocumented#Surface_Properties'>Surface Properties</a>, creates <a href='SkSurface_Reference#Surface'>Surface</a> with default <a href='undocumented#Surface_Properties'>Surface Properties</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_makeSurface_info'><code><strong>info</strong></code></a></td>
|
|
<td>width, height, <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>, <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>, and <a href='undocumented#Color_Space'>Color Space</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_makeSurface_props'><code><strong>props</strong></code></a></td>
|
|
<td><a href='undocumented#Surface_Properties'>Surface Properties</a> to match; may be nullptr to match <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='SkSurface_Reference#Surface'>Surface</a> matching <a href='#SkCanvas_makeSurface_info'>info</a> and <a href='#SkCanvas_makeSurface_props'>props</a>, or nullptr if no match is available
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1ce28351444b41ab2b8e3128a4b9b9c2">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
compatible != nullptr
|
|
size = 3, 4
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='SkSurface_Reference#SkSurface_makeSurface'>SkSurface::makeSurface</a> <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='undocumented#SkSurfaceProps'>SkSurfaceProps</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getGrContext'></a>
|
|
## getGrContext
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
virtual <a href='undocumented#GrContext'>GrContext</a>* <a href='#SkCanvas_getGrContext'>getGrContext</a>()
|
|
</pre>
|
|
|
|
Returns <a href='undocumented#GPU_Context'>GPU Context</a> of the <a href='undocumented#GPU_Surface'>GPU Surface</a> associated with <a href='#Canvas'>Canvas</a>.
|
|
|
|
### Return Value
|
|
|
|
<a href='undocumented#GPU_Context'>GPU Context</a>, if available; nullptr otherwise
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="c4ea949e5fa5a0630dcb6b0204bd498f"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='undocumented#GrContext'>GrContext</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_accessTopLayerPixels'></a>
|
|
## accessTopLayerPixels
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void* <a href='#SkCanvas_accessTopLayerPixels'>accessTopLayerPixels</a>(<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>* info, size_t* rowBytes, <a href='SkIPoint_Reference#SkIPoint'>SkIPoint</a>* origin = nullptr)
|
|
</pre>
|
|
|
|
Returns the pixel base address, <a href='SkImageInfo_Reference#Image_Info'>Image Info</a>, <a href='#SkCanvas_accessTopLayerPixels_rowBytes'>rowBytes</a>, and <a href='#SkCanvas_accessTopLayerPixels_origin'>origin</a> if the pixels
|
|
can be read directly. The returned address is only valid
|
|
while <a href='#Canvas'>Canvas</a> is in scope and unchanged. Any <a href='#Canvas'>Canvas</a> call or <a href='SkSurface_Reference#Surface'>Surface</a> call
|
|
may invalidate the returned address and other returned values.
|
|
|
|
If pixels are inaccessible, <a href='#SkCanvas_accessTopLayerPixels_info'>info</a>, <a href='#SkCanvas_accessTopLayerPixels_rowBytes'>rowBytes</a>, and <a href='#SkCanvas_accessTopLayerPixels_origin'>origin</a> are unchanged.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_accessTopLayerPixels_info'><code><strong>info</strong></code></a></td>
|
|
<td>storage for writable pixels' <a href='SkImageInfo_Reference#Image_Info'>Image Info</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_accessTopLayerPixels_rowBytes'><code><strong>rowBytes</strong></code></a></td>
|
|
<td>storage for writable pixels' row bytes; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_accessTopLayerPixels_origin'><code><strong>origin</strong></code></a></td>
|
|
<td>storage for <a href='#Canvas'>Canvas</a> top <a href='#Layer'>Layer</a> <a href='#SkCanvas_accessTopLayerPixels_origin'>origin</a>, its top-left corner;
|
|
may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
address of pixels, or nullptr if inaccessible
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="38d0d6ca9bea146d31bcbec197856359"></fiddle-embed></div>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="a7ac9c21bbabcdeeca00f72a61cd0f3e"><div>Draws "" on the device. Then draws "" in <a href='#Layer'>Layer</a>, and reads
|
|
<a href='#Layer'>Layer</a> to add a large dotted "". Finally blends <a href='#Layer'>Layer</a> with the
|
|
device.
|
|
|
|
The <a href='#Layer'>Layer</a> and blended result appear on the CPU and GPU but the large dotted
|
|
"" appear only on the CPU.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_accessTopRasterHandle'></a>
|
|
## accessTopRasterHandle
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='undocumented#SkRasterHandleAllocator_Handle'>SkRasterHandleAllocator::Handle</a> <a href='#SkCanvas_accessTopRasterHandle'>accessTopRasterHandle</a>() const
|
|
</pre>
|
|
|
|
Returns custom context that tracks the <a href='#Matrix'>Matrix</a> and <a href='#Clip'>Clip</a>.
|
|
|
|
Use <a href='undocumented#Raster_Handle_Allocator'>Raster Handle Allocator</a> to blend Skia drawing with custom drawing, typically performed
|
|
by the host platform user interface. The custom context returned is generated by
|
|
<a href='undocumented#SkRasterHandleAllocator_MakeCanvas'>SkRasterHandleAllocator::MakeCanvas</a>, which creates a custom canvas with raster storage for
|
|
the drawing destination.
|
|
|
|
### Return Value
|
|
|
|
context of custom allocation
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4486d0c0b22ad2931db130f42da4c80c"><div></div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
context = skia
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='undocumented#SkRasterHandleAllocator'>SkRasterHandleAllocator</a>
|
|
|
|
---
|
|
|
|
## <a name='Pixels'>Pixels</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_peekPixels'>peekPixels</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>returns if <a href='#Canvas'>Canvas</a> has direct access to its pixels</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_readPixels'>readPixels</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>copies and converts rectangle of pixels from <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_readPixels'>readPixels(const SkImageInfo& dstInfo, void* dstPixels, size t dstRowBytes, int srcX, int srcY)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_readPixels_2'>readPixels(const SkPixmap& pixmap, int srcX, int srcY)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_readPixels_3'>readPixels(const SkBitmap& bitmap, int srcX, int srcY)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_writePixels'>writePixels</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>copies and converts rectangle of pixels to <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_writePixels'>writePixels(const SkImageInfo& info, const void* pixels, size t rowBytes, int x, int y)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_writePixels_2'>writePixels(const SkBitmap& bitmap, int x, int y)</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_peekPixels'></a>
|
|
## peekPixels
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_peekPixels'>peekPixels</a>(<a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>* pixmap)
|
|
</pre>
|
|
|
|
Returns true if <a href='#Canvas'>Canvas</a> has direct access to its pixels.
|
|
|
|
<a href='#Pixels'>Pixels</a> are readable when <a href='undocumented#Device'>Device</a> is raster. <a href='#Pixels'>Pixels</a> are not readable when <a href='#Canvas'>Canvas</a>
|
|
is returned from <a href='undocumented#GPU_Surface'>GPU Surface</a>, returned by <a href='undocumented#SkDocument_beginPage'>SkDocument::beginPage</a>, returned by
|
|
<a href='undocumented#SkPictureRecorder_beginRecording'>SkPictureRecorder::beginRecording</a>, or <a href='#Canvas'>Canvas</a> is the base of a utility class
|
|
like <a href='undocumented#SkDebugCanvas'>SkDebugCanvas</a>.
|
|
|
|
<a href='#SkCanvas_peekPixels_pixmap'>pixmap</a> is valid only while <a href='#Canvas'>Canvas</a> is in scope and unchanged. Any
|
|
<a href='#Canvas'>Canvas</a> or <a href='SkSurface_Reference#Surface'>Surface</a> call may invalidate the <a href='#SkCanvas_peekPixels_pixmap'>pixmap</a> values.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_peekPixels_pixmap'><code><strong>pixmap</strong></code></a></td>
|
|
<td>storage for pixel state if pixels are readable; otherwise, ignored</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#Canvas'>Canvas</a> has direct access to pixels
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e9411d676d1fa13b46331abe9e14ad3e">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
width=256 height=256
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_readPixels'>readPixels</a><sup><a href='#SkCanvas_readPixels_2'>[2]</a></sup><sup><a href='#SkCanvas_readPixels_3'>[3]</a></sup> <a href='SkBitmap_Reference#SkBitmap_peekPixels'>SkBitmap::peekPixels</a> <a href='SkImage_Reference#SkImage_peekPixels'>SkImage::peekPixels</a> <a href='SkSurface_Reference#SkSurface_peekPixels'>SkSurface::peekPixels</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_readPixels'></a>
|
|
## readPixels
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_readPixels'>readPixels</a>(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& dstInfo, void* dstPixels, size_t dstRowBytes, int srcX, int srcY)
|
|
</pre>
|
|
|
|
Copies <a href='SkRect_Reference#Rect'>Rect</a> of pixels from <a href='#Canvas'>Canvas</a> into <a href='#SkCanvas_readPixels_dstPixels'>dstPixels</a>. <a href='#Matrix'>Matrix</a> and <a href='#Clip'>Clip</a> are
|
|
ignored.
|
|
|
|
Source <a href='SkRect_Reference#Rect'>Rect</a> corners are (<a href='#SkCanvas_readPixels_srcX'>srcX</a>, <a href='#SkCanvas_readPixels_srcY'>srcY</a>) and (<a href='#SkCanvas_imageInfo'>imageInfo</a>.width(), <a href='#SkCanvas_imageInfo'>imageInfo</a>.height()).
|
|
Destination <a href='SkRect_Reference#Rect'>Rect</a> corners are (0, 0) and (<a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.width(), <a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.height()).
|
|
Copies each readable pixel intersecting both rectangles, without scaling,
|
|
converting to <a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.colorType() and <a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.alphaType() if required.
|
|
|
|
<a href='#Pixels'>Pixels</a> are readable when <a href='undocumented#Device'>Device</a> is raster, or backed by a GPU.
|
|
<a href='#Pixels'>Pixels</a> are not readable when <a href='#SkCanvas'>SkCanvas</a> is returned by <a href='undocumented#SkDocument_beginPage'>SkDocument::beginPage</a>,
|
|
returned by <a href='undocumented#SkPictureRecorder_beginRecording'>SkPictureRecorder::beginRecording</a>, or <a href='#Canvas'>Canvas</a> is the base of a utility
|
|
class like <a href='undocumented#SkDebugCanvas'>SkDebugCanvas</a>.
|
|
|
|
The destination pixel storage must be allocated by the caller.
|
|
|
|
<a href='undocumented#Pixel'>Pixel</a> values are converted only if <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>
|
|
do not match. Only pixels within both source and destination rectangles
|
|
are copied. <a href='#SkCanvas_readPixels_dstPixels'>dstPixels</a> contents outside <a href='SkRect_Reference#Rect'>Rect</a> intersection are unchanged.
|
|
|
|
Pass negative values for <a href='#SkCanvas_readPixels_srcX'>srcX</a> or <a href='#SkCanvas_readPixels_srcY'>srcY</a> to offset pixels across or down destination.
|
|
|
|
Does not copy, and returns false if:
|
|
|
|
<table> <tr>
|
|
<td>Source and destination rectangles do not intersect.</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> pixels could not be converted to <a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.colorType() or <a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.alphaType().</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> pixels are not readable; for instance, <a href='#Canvas'>Canvas</a> is document-based.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_readPixels_dstRowBytes'>dstRowBytes</a> is too small to contain one row of pixels.</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_readPixels_dstInfo'><code><strong>dstInfo</strong></code></a></td>
|
|
<td>width, height, <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>, and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a> of <a href='#SkCanvas_readPixels_dstPixels'>dstPixels</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_dstPixels'><code><strong>dstPixels</strong></code></a></td>
|
|
<td>storage for pixels; <a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.height() times <a href='#SkCanvas_readPixels_dstRowBytes'>dstRowBytes</a>, or larger</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_dstRowBytes'><code><strong>dstRowBytes</strong></code></a></td>
|
|
<td>size of one destination row; <a href='#SkCanvas_readPixels_dstInfo'>dstInfo</a>.width() times pixel size, or larger</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_srcX'><code><strong>srcX</strong></code></a></td>
|
|
<td>offset into readable pixels on x-axis; may be negative</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_srcY'><code><strong>srcY</strong></code></a></td>
|
|
<td>offset into readable pixels on y-axis; may be negative</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if pixels were copied
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="102d014d7f753db2a9b9ee08893aaf11"><div>A black circle drawn on a blue background provides an image to copy.
|
|
<a href='#SkCanvas_readPixels'>readPixels</a> copies one quarter of the canvas into each of the four corners.
|
|
The copied quarter circles overdraw the original circle.
|
|
</div></fiddle-embed></div>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="481e990e923a0ed34654f4361b94f096"><div><a href='#Canvas'>Canvas</a> returned by <a href='undocumented#Raster_Surface'>Raster Surface</a> has <a href='undocumented#Premultiply'>Premultiplied</a> pixel values.
|
|
<a href='#SkCanvas_clear'>clear</a> takes <a href='undocumented#Unpremultiply'>Unpremultiplied</a> input with <a href='SkColor_Reference#Alpha'>Color Alpha</a> equal 0x80
|
|
and RGB equal 0x55, 0xAA, 0xFF. RGB is multiplied by <a href='SkColor_Reference#Alpha'>Color Alpha</a>
|
|
to generate <a href='undocumented#Premultiply'>Premultiplied</a> value 0x802B5580. <a href='#SkCanvas_readPixels'>readPixels</a> converts pixel back
|
|
to <a href='undocumented#Unpremultiply'>Unpremultiplied</a> value 0x8056A9FF, introducing error.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
pixel = 802b5580
|
|
pixel = 8056a9ff
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_peekPixels'>peekPixels</a> <a href='#SkCanvas_writePixels'>writePixels</a><sup><a href='#SkCanvas_writePixels_2'>[2]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='SkBitmap_Reference#SkBitmap_readPixels'>SkBitmap::readPixels</a><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_2'>[2]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_3'>[3]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_4'>[4]</a></sup> <a href='SkPixmap_Reference#SkPixmap_readPixels'>SkPixmap::readPixels</a><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_2'>[2]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_3'>[3]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_4'>[4]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_5'>[5]</a></sup> <a href='SkImage_Reference#SkImage_readPixels'>SkImage::readPixels</a><sup><a href='SkImage_Reference#SkImage_readPixels_2'>[2]</a></sup> <a href='SkSurface_Reference#SkSurface_readPixels'>SkSurface::readPixels</a><sup><a href='SkSurface_Reference#SkSurface_readPixels_2'>[2]</a></sup><sup><a href='SkSurface_Reference#SkSurface_readPixels_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_readPixels_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_readPixels'>readPixels</a>(const <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>& pixmap, int srcX, int srcY)
|
|
</pre>
|
|
|
|
Copies <a href='SkRect_Reference#Rect'>Rect</a> of pixels from <a href='#Canvas'>Canvas</a> into <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>. <a href='#Matrix'>Matrix</a> and <a href='#Clip'>Clip</a> are
|
|
ignored.
|
|
|
|
Source <a href='SkRect_Reference#Rect'>Rect</a> corners are (<a href='#SkCanvas_readPixels_2_srcX'>srcX</a>, <a href='#SkCanvas_readPixels_2_srcY'>srcY</a>) and (<a href='#SkCanvas_imageInfo'>imageInfo</a>.width(), <a href='#SkCanvas_imageInfo'>imageInfo</a>.height()).
|
|
Destination <a href='SkRect_Reference#Rect'>Rect</a> corners are (0, 0) and (<a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.width(), <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.height()).
|
|
Copies each readable pixel intersecting both rectangles, without scaling,
|
|
converting to <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.colorType() and <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.alphaType() if required.
|
|
|
|
<a href='#Pixels'>Pixels</a> are readable when <a href='undocumented#Device'>Device</a> is raster, or backed by a GPU.
|
|
<a href='#Pixels'>Pixels</a> are not readable when <a href='#SkCanvas'>SkCanvas</a> is returned by <a href='undocumented#SkDocument_beginPage'>SkDocument::beginPage</a>,
|
|
returned by <a href='undocumented#SkPictureRecorder_beginRecording'>SkPictureRecorder::beginRecording</a>, or <a href='#Canvas'>Canvas</a> is the base of a utility
|
|
class like <a href='undocumented#SkDebugCanvas'>SkDebugCanvas</a>.
|
|
|
|
Caller must allocate pixel storage in <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a> if needed.
|
|
|
|
<a href='undocumented#Pixel'>Pixel</a> values are converted only if <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>
|
|
do not match. Only pixels within both source and destination <a href='SkRect_Reference#Rect'>Rects</a>
|
|
are copied. <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a> pixels contents outside <a href='SkRect_Reference#Rect'>Rect</a> intersection are unchanged.
|
|
|
|
Pass negative values for <a href='#SkCanvas_readPixels_2_srcX'>srcX</a> or <a href='#SkCanvas_readPixels_2_srcY'>srcY</a> to offset pixels across or down <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.
|
|
|
|
Does not copy, and returns false if:
|
|
|
|
<table> <tr>
|
|
<td>Source and destination rectangles do not intersect.</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> pixels could not be converted to <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.colorType() or <a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.alphaType().</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> pixels are not readable; for instance, <a href='#Canvas'>Canvas</a> is document-based.</td>
|
|
</tr> <tr>
|
|
<td><a href='SkPixmap_Reference#Pixmap'>Pixmap</a> pixels could not be allocated.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_readPixels_2_pixmap'>pixmap</a>.rowBytes() is too small to contain one row of pixels.</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_readPixels_2_pixmap'><code><strong>pixmap</strong></code></a></td>
|
|
<td>storage for pixels copied from <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_2_srcX'><code><strong>srcX</strong></code></a></td>
|
|
<td>offset into readable pixels on x-axis; may be negative</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_2_srcY'><code><strong>srcY</strong></code></a></td>
|
|
<td>offset into readable pixels on y-axis; may be negative</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if pixels were copied
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="85f199032943b6483722c34a91c4e20f"><div><a href='#SkCanvas_clear'>clear</a> takes <a href='undocumented#Unpremultiply'>Unpremultiplied</a> input with <a href='SkColor_Reference#Alpha'>Color Alpha</a> equal 0x80
|
|
and RGB equal 0x55, 0xAA, 0xFF. RGB is multiplied by <a href='SkColor_Reference#Alpha'>Color Alpha</a>
|
|
to generate <a href='undocumented#Premultiply'>Premultiplied</a> value 0x802B5580.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
pixel = 802b5580
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_peekPixels'>peekPixels</a> <a href='#SkCanvas_writePixels'>writePixels</a><sup><a href='#SkCanvas_writePixels_2'>[2]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='SkBitmap_Reference#SkBitmap_readPixels'>SkBitmap::readPixels</a><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_2'>[2]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_3'>[3]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_4'>[4]</a></sup> <a href='SkPixmap_Reference#SkPixmap_readPixels'>SkPixmap::readPixels</a><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_2'>[2]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_3'>[3]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_4'>[4]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_5'>[5]</a></sup> <a href='SkImage_Reference#SkImage_readPixels'>SkImage::readPixels</a><sup><a href='SkImage_Reference#SkImage_readPixels_2'>[2]</a></sup> <a href='SkSurface_Reference#SkSurface_readPixels'>SkSurface::readPixels</a><sup><a href='SkSurface_Reference#SkSurface_readPixels_2'>[2]</a></sup><sup><a href='SkSurface_Reference#SkSurface_readPixels_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_readPixels_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_readPixels'>readPixels</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, int srcX, int srcY)
|
|
</pre>
|
|
|
|
Copies <a href='SkRect_Reference#Rect'>Rect</a> of pixels from <a href='#Canvas'>Canvas</a> into <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>. <a href='#Matrix'>Matrix</a> and <a href='#Clip'>Clip</a> are
|
|
ignored.
|
|
|
|
Source <a href='SkRect_Reference#Rect'>Rect</a> corners are (<a href='#SkCanvas_readPixels_3_srcX'>srcX</a>, <a href='#SkCanvas_readPixels_3_srcY'>srcY</a>) and (<a href='#SkCanvas_imageInfo'>imageInfo</a>.width(), <a href='#SkCanvas_imageInfo'>imageInfo</a>.height()).
|
|
Destination <a href='SkRect_Reference#Rect'>Rect</a> corners are (0, 0) and (<a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.width(), <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.height()).
|
|
Copies each readable pixel intersecting both rectangles, without scaling,
|
|
converting to <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.colorType() and <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.alphaType() if required.
|
|
|
|
<a href='#Pixels'>Pixels</a> are readable when <a href='undocumented#Device'>Device</a> is raster, or backed by a GPU.
|
|
<a href='#Pixels'>Pixels</a> are not readable when <a href='#SkCanvas'>SkCanvas</a> is returned by <a href='undocumented#SkDocument_beginPage'>SkDocument::beginPage</a>,
|
|
returned by <a href='undocumented#SkPictureRecorder_beginRecording'>SkPictureRecorder::beginRecording</a>, or <a href='#Canvas'>Canvas</a> is the base of a utility
|
|
class like <a href='undocumented#SkDebugCanvas'>SkDebugCanvas</a>.
|
|
|
|
Caller must allocate pixel storage in <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a> if needed.
|
|
|
|
<a href='SkBitmap_Reference#Bitmap'>Bitmap</a> values are converted only if <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>
|
|
do not match. Only pixels within both source and destination rectangles
|
|
are copied. <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> pixels outside <a href='SkRect_Reference#Rect'>Rect</a> intersection are unchanged.
|
|
|
|
Pass negative values for <a href='#SkCanvas_readPixels_3_srcX'>srcX</a> or <a href='#SkCanvas_readPixels_3_srcY'>srcY</a> to offset pixels across or down <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.
|
|
|
|
Does not copy, and returns false if:
|
|
|
|
<table> <tr>
|
|
<td>Source and destination rectangles do not intersect.</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> pixels could not be converted to <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.colorType() or <a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.alphaType().</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> pixels are not readable; for instance, <a href='#Canvas'>Canvas</a> is document-based.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a> pixels could not be allocated.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_readPixels_3_bitmap'>bitmap</a>.rowBytes() is too small to contain one row of pixels.</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_readPixels_3_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td>storage for pixels copied from <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_3_srcX'><code><strong>srcX</strong></code></a></td>
|
|
<td>offset into readable pixels on x-axis; may be negative</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_readPixels_3_srcY'><code><strong>srcY</strong></code></a></td>
|
|
<td>offset into readable pixels on y-axis; may be negative</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if pixels were copied
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="af6dec8ef974aa67bf102f29915bcd6a"><div><a href='#SkCanvas_clear'>clear</a> takes <a href='undocumented#Unpremultiply'>Unpremultiplied</a> input with <a href='SkColor_Reference#Alpha'>Color Alpha</a> equal 0x80
|
|
and RGB equal 0x55, 0xAA, 0xFF. RGB is multiplied by <a href='SkColor_Reference#Alpha'>Color Alpha</a>
|
|
to generate <a href='undocumented#Premultiply'>Premultiplied</a> value 0x802B5580.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
pixel = 802b5580
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_peekPixels'>peekPixels</a> <a href='#SkCanvas_writePixels'>writePixels</a><sup><a href='#SkCanvas_writePixels_2'>[2]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='SkBitmap_Reference#SkBitmap_readPixels'>SkBitmap::readPixels</a><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_2'>[2]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_3'>[3]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_4'>[4]</a></sup> <a href='SkPixmap_Reference#SkPixmap_readPixels'>SkPixmap::readPixels</a><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_2'>[2]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_3'>[3]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_4'>[4]</a></sup><sup><a href='SkPixmap_Reference#SkPixmap_readPixels_5'>[5]</a></sup> <a href='SkImage_Reference#SkImage_readPixels'>SkImage::readPixels</a><sup><a href='SkImage_Reference#SkImage_readPixels_2'>[2]</a></sup> <a href='SkSurface_Reference#SkSurface_readPixels'>SkSurface::readPixels</a><sup><a href='SkSurface_Reference#SkSurface_readPixels_2'>[2]</a></sup><sup><a href='SkSurface_Reference#SkSurface_readPixels_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_writePixels'></a>
|
|
## writePixels
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_writePixels'>writePixels</a>(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& info, const void* pixels, size_t rowBytes, int x, int y)
|
|
</pre>
|
|
|
|
Copies <a href='SkRect_Reference#Rect'>Rect</a> from <a href='#SkCanvas_writePixels_pixels'>pixels</a> to <a href='#Canvas'>Canvas</a>. <a href='#Matrix'>Matrix</a> and <a href='#Clip'>Clip</a> are ignored.
|
|
Source <a href='SkRect_Reference#Rect'>Rect</a> corners are (0, 0) and (<a href='#SkCanvas_writePixels_info'>info</a>.width(), <a href='#SkCanvas_writePixels_info'>info</a>.height()).
|
|
Destination <a href='SkRect_Reference#Rect'>Rect</a> corners are (<a href='#SkCanvas_writePixels_x'>x</a>, <a href='#SkCanvas_writePixels_y'>y</a>) and
|
|
(<a href='#SkCanvas_imageInfo'>imageInfo</a>.width(), <a href='#SkCanvas_imageInfo'>imageInfo</a>.height()).
|
|
|
|
Copies each readable pixel intersecting both rectangles, without scaling,
|
|
converting to <a href='#SkCanvas_imageInfo'>imageInfo</a>.colorType() and <a href='#SkCanvas_imageInfo'>imageInfo</a>.alphaType() if required.
|
|
|
|
<a href='#Pixels'>Pixels</a> are writable when <a href='undocumented#Device'>Device</a> is raster, or backed by a GPU.
|
|
<a href='#Pixels'>Pixels</a> are not writable when <a href='#SkCanvas'>SkCanvas</a> is returned by <a href='undocumented#SkDocument_beginPage'>SkDocument::beginPage</a>,
|
|
returned by <a href='undocumented#SkPictureRecorder_beginRecording'>SkPictureRecorder::beginRecording</a>, or <a href='#Canvas'>Canvas</a> is the base of a utility
|
|
class like <a href='undocumented#SkDebugCanvas'>SkDebugCanvas</a>.
|
|
|
|
<a href='undocumented#Pixel'>Pixel</a> values are converted only if <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>
|
|
do not match. Only <a href='#SkCanvas_writePixels_pixels'>pixels</a> within both source and destination rectangles
|
|
are copied. <a href='#Canvas'>Canvas</a> <a href='#SkCanvas_writePixels_pixels'>pixels</a> outside <a href='SkRect_Reference#Rect'>Rect</a> intersection are unchanged.
|
|
|
|
Pass negative values for <a href='#SkCanvas_writePixels_x'>x</a> or <a href='#SkCanvas_writePixels_y'>y</a> to offset <a href='#SkCanvas_writePixels_pixels'>pixels</a> to the left or
|
|
above <a href='#Canvas'>Canvas</a> <a href='#SkCanvas_writePixels_pixels'>pixels</a>.
|
|
|
|
Does not copy, and returns false if:
|
|
|
|
<table> <tr>
|
|
<td>Source and destination rectangles do not intersect.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_writePixels_pixels'>pixels</a> could not be converted to <a href='#Canvas'>Canvas</a> <a href='#SkCanvas_imageInfo'>imageInfo</a>.colorType() or
|
|
<a href='#SkCanvas_imageInfo'>imageInfo</a>.alphaType().</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> <a href='#SkCanvas_writePixels_pixels'>pixels</a> are not writable; for instance, <a href='#Canvas'>Canvas</a> is document-based.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_writePixels_rowBytes'>rowBytes</a> is too small to contain one row of <a href='#SkCanvas_writePixels_pixels'>pixels</a>.</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_writePixels_info'><code><strong>info</strong></code></a></td>
|
|
<td>width, height, <a href='SkImageInfo_Reference#Color_Type'>Color Type</a>, and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a> of <a href='#SkCanvas_writePixels_pixels'>pixels</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_writePixels_pixels'><code><strong>pixels</strong></code></a></td>
|
|
<td><a href='#SkCanvas_writePixels_pixels'>pixels</a> to copy, of size <a href='#SkCanvas_writePixels_info'>info</a>.height() times <a href='#SkCanvas_writePixels_rowBytes'>rowBytes</a>, or larger</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_writePixels_rowBytes'><code><strong>rowBytes</strong></code></a></td>
|
|
<td>size of one row of <a href='#SkCanvas_writePixels_pixels'>pixels</a>; <a href='#SkCanvas_writePixels_info'>info</a>.width() times pixel size, or larger</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_writePixels_x'><code><strong>x</strong></code></a></td>
|
|
<td>offset into <a href='#Canvas'>Canvas</a> writable <a href='#SkCanvas_writePixels_pixels'>pixels</a> on <a href='#SkCanvas_writePixels_x'>x</a>-axis; may be negative</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_writePixels_y'><code><strong>y</strong></code></a></td>
|
|
<td>offset into <a href='#Canvas'>Canvas</a> writable <a href='#SkCanvas_writePixels_pixels'>pixels</a> on <a href='#SkCanvas_writePixels_y'>y</a>-axis; may be negative</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#SkCanvas_writePixels_pixels'>pixels</a> were written to <a href='#Canvas'>Canvas</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="29b98ebf58aa9fd1edfaabf9f4490b3a"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_readPixels'>readPixels</a><sup><a href='#SkCanvas_readPixels_2'>[2]</a></sup><sup><a href='#SkCanvas_readPixels_3'>[3]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='SkBitmap_Reference#SkBitmap_writePixels'>SkBitmap::writePixels</a><sup><a href='SkBitmap_Reference#SkBitmap_writePixels_2'>[2]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_writePixels_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_writePixels_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_writePixels'>writePixels</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, int x, int y)
|
|
</pre>
|
|
|
|
Copies <a href='SkRect_Reference#Rect'>Rect</a> from pixels to <a href='#Canvas'>Canvas</a>. <a href='#Matrix'>Matrix</a> and <a href='#Clip'>Clip</a> are ignored.
|
|
Source <a href='SkRect_Reference#Rect'>Rect</a> corners are (0, 0) and (<a href='#SkCanvas_writePixels_2_bitmap'>bitmap</a>.width(), <a href='#SkCanvas_writePixels_2_bitmap'>bitmap</a>.height()).
|
|
|
|
Destination <a href='SkRect_Reference#Rect'>Rect</a> corners are (<a href='#SkCanvas_writePixels_2_x'>x</a>, <a href='#SkCanvas_writePixels_2_y'>y</a>) and
|
|
(<a href='#SkCanvas_imageInfo'>imageInfo</a>.width(), <a href='#SkCanvas_imageInfo'>imageInfo</a>.height()).
|
|
|
|
Copies each readable pixel intersecting both rectangles, without scaling,
|
|
converting to <a href='#SkCanvas_imageInfo'>imageInfo</a>.colorType() and <a href='#SkCanvas_imageInfo'>imageInfo</a>.alphaType() if required.
|
|
|
|
<a href='#Pixels'>Pixels</a> are writable when <a href='undocumented#Device'>Device</a> is raster, or backed by a GPU.
|
|
<a href='#Pixels'>Pixels</a> are not writable when <a href='#SkCanvas'>SkCanvas</a> is returned by <a href='undocumented#SkDocument_beginPage'>SkDocument::beginPage</a>,
|
|
returned by <a href='undocumented#SkPictureRecorder_beginRecording'>SkPictureRecorder::beginRecording</a>, or <a href='#Canvas'>Canvas</a> is the base of a utility
|
|
class like <a href='undocumented#SkDebugCanvas'>SkDebugCanvas</a>.
|
|
|
|
<a href='undocumented#Pixel'>Pixel</a> values are converted only if <a href='SkImageInfo_Reference#Color_Type'>Color Type</a> and <a href='SkImageInfo_Reference#Alpha_Type'>Alpha Type</a>
|
|
do not match. Only pixels within both source and destination rectangles
|
|
are copied. <a href='#Canvas'>Canvas</a> pixels outside <a href='SkRect_Reference#Rect'>Rect</a> intersection are unchanged.
|
|
|
|
Pass negative values for <a href='#SkCanvas_writePixels_2_x'>x</a> or <a href='#SkCanvas_writePixels_2_y'>y</a> to offset pixels to the left or
|
|
above <a href='#Canvas'>Canvas</a> pixels.
|
|
|
|
Does not copy, and returns false if:
|
|
|
|
<table> <tr>
|
|
<td>Source and destination rectangles do not intersect.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_writePixels_2_bitmap'>bitmap</a> does not have allocated pixels.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_writePixels_2_bitmap'>bitmap</a> pixels could not be converted to <a href='#Canvas'>Canvas</a> <a href='#SkCanvas_imageInfo'>imageInfo</a>.colorType() or
|
|
<a href='#SkCanvas_imageInfo'>imageInfo</a>.alphaType().</td>
|
|
</tr> <tr>
|
|
<td><a href='#Canvas'>Canvas</a> pixels are not writable; for instance, <a href='#Canvas'>Canvas</a> is document based.</td>
|
|
</tr> <tr>
|
|
<td><a href='#SkCanvas_writePixels_2_bitmap'>bitmap</a> pixels are inaccessible; for instance, <a href='#SkCanvas_writePixels_2_bitmap'>bitmap</a> wraps a texture.</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_writePixels_2_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td>contains pixels copied to <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_writePixels_2_x'><code><strong>x</strong></code></a></td>
|
|
<td>offset into <a href='#Canvas'>Canvas</a> writable pixels in <a href='#SkCanvas_writePixels_2_x'>x</a>; may be negative</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_writePixels_2_y'><code><strong>y</strong></code></a></td>
|
|
<td>offset into <a href='#Canvas'>Canvas</a> writable pixels in <a href='#SkCanvas_writePixels_2_y'>y</a>; may be negative</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if pixels were written to <a href='#Canvas'>Canvas</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8b128e067881f9251357653692fa28da"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_readPixels'>readPixels</a><sup><a href='#SkCanvas_readPixels_2'>[2]</a></sup><sup><a href='#SkCanvas_readPixels_3'>[3]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='SkBitmap_Reference#SkBitmap_writePixels'>SkBitmap::writePixels</a><sup><a href='SkBitmap_Reference#SkBitmap_writePixels_2'>[2]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_writePixels_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
## <a name='State_Stack'>State Stack</a>
|
|
|
|
<a href='#Canvas'>Canvas</a> maintains a stack of state that allows hierarchical drawing, commonly used
|
|
to implement windows and views. The initial state has an identity matrix and and
|
|
an infinite clip. Even with a wide-open clip, drawing is constrained by the
|
|
bounds of the <a href='#Canvas'>Canvas</a> <a href='SkSurface_Reference#Surface'>Surface</a> or <a href='undocumented#Device'>Device</a>.
|
|
|
|
<a href='#Canvas'>Canvas</a> savable state consists of <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>.
|
|
<a href='#Clip'>Clip</a> describes the area that may be drawn to.
|
|
<a href='#Matrix'>Matrix</a> transforms the geometry.
|
|
<a href='undocumented#Draw_Filter'>Draw Filter</a> (deprecated on most platforms) modifies the paint before drawing.
|
|
|
|
<a href='#SkCanvas_save'>save</a>, <a href='#SkCanvas_saveLayer'>saveLayer</a>, <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a>, and <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a>
|
|
save state and return the depth of the stack.
|
|
|
|
<a href='#SkCanvas_restore'>restore</a>, <a href='#SkCanvas_restoreToCount'>restoreToCount</a>, and <a href='#SkCanvas_destructor'>~SkCanvas()</a> revert state to its value when saved.
|
|
|
|
Each state on the stack intersects <a href='#Clip'>Clip</a> with the previous <a href='#Clip'>Clip</a>,
|
|
and concatenates <a href='#Matrix'>Matrix</a> with the previous <a href='#Matrix'>Matrix</a>.
|
|
The intersected <a href='#Clip'>Clip</a> makes the drawing area the same or smaller;
|
|
the concatenated <a href='#Matrix'>Matrix</a> may move the origin and potentially scale or rotate
|
|
the coordinate space.
|
|
|
|
<a href='#Canvas'>Canvas</a> does not require balancing the state stack but it is a good idea
|
|
to do so. Calling <a href='#SkCanvas_save'>save</a> without <a href='#SkCanvas_restore'>restore</a> will eventually cause Skia to fail;
|
|
mismatched <a href='#SkCanvas_save'>save</a> and <a href='#SkCanvas_restore'>restore</a> create hard to find bugs.
|
|
|
|
It is not possible to use state to draw outside of the clip defined by the
|
|
previous state.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="bb1dbfdca3aedf716beb6f07e2aab065"><div><a href='#Draw'>Draw</a> to ever smaller clips; then restore drawing to full canvas.
|
|
Note that the second <a href='#SkCanvas_clipRect'>clipRect</a> is not permitted to enlarge <a href='#Clip'>Clip</a>.
|
|
</div></fiddle-embed></div>
|
|
|
|
Each <a href='#Clip'>Clip</a> uses the current <a href='#Matrix'>Matrix</a> for its coordinates.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9f563a2d60aa31d4b26742e5aa17aa4e"><div>While <a href='#SkCanvas_clipRect'>clipRect</a> is given the same rectangle twice, <a href='#Matrix'>Matrix</a> makes the second
|
|
<a href='#SkCanvas_clipRect'>clipRect</a> draw at half the size of the first.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_restoreToCount'>restoreToCount</a>
|
|
|
|
<a name='SkCanvas_save'></a>
|
|
## save
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkCanvas_save'>save</a>()
|
|
</pre>
|
|
|
|
Saves <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> (<a href='undocumented#Draw_Filter'>Draw Filter</a> deprecated on most platforms).
|
|
Calling <a href='#SkCanvas_restore'>restore</a> discards changes to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>,
|
|
restoring the <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> to their state when <a href='#SkCanvas_save'>save</a> was called.
|
|
|
|
<a href='#Matrix'>Matrix</a> may be changed by <a href='#SkCanvas_translate'>translate</a>, <a href='#SkCanvas_scale'>scale</a>, <a href='#SkCanvas_rotate'>rotate</a>, <a href='#SkCanvas_skew'>skew</a>, <a href='#SkCanvas_concat'>concat</a>, <a href='#SkCanvas_setMatrix'>setMatrix</a>,
|
|
and <a href='#SkCanvas_resetMatrix'>resetMatrix</a>. <a href='#Clip'>Clip</a> may be changed by <a href='#SkCanvas_clipRect'>clipRect</a>, <a href='#SkCanvas_clipRRect'>clipRRect</a>, <a href='#SkCanvas_clipPath'>clipPath</a>, <a href='#SkCanvas_clipRegion'>clipRegion</a>.
|
|
|
|
Saved <a href='#Canvas'>Canvas</a> state is put on a stack; multiple calls to <a href='#SkCanvas_save'>save</a> should be balance
|
|
by an equal number of calls to <a href='#SkCanvas_restore'>restore</a>.
|
|
|
|
Call <a href='#SkCanvas_restoreToCount'>restoreToCount</a> with result to restore this and subsequent saves.
|
|
|
|
### Return Value
|
|
|
|
depth of saved stack
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e477dce358a9ba3b0aa1bf33b8a376de"><div>The black square is translated 50 pixels down and to the right.
|
|
Restoring <a href='#Canvas'>Canvas</a> state removes <a href='#SkCanvas_translate'>translate</a> from <a href='#Canvas'>Canvas</a> stack;
|
|
the red square is not translated, and is drawn at the origin.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_restoreToCount'>restoreToCount</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_restore'></a>
|
|
## restore
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_restore'>restore</a>()
|
|
</pre>
|
|
|
|
Removes changes to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> since <a href='#Canvas'>Canvas</a> state was
|
|
last saved. The state is removed from the stack.
|
|
|
|
Does nothing if the stack is empty.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e78471212a67f2f4fd39496e17a30d17"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> <a href='#SkCanvas_restoreToCount'>restoreToCount</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getSaveCount'></a>
|
|
## getSaveCount
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkCanvas_getSaveCount'>getSaveCount</a>() const
|
|
</pre>
|
|
|
|
Returns the number of saved states, each containing: <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>.
|
|
Equals the number of <a href='#SkCanvas_save'>save</a> calls less the number of <a href='#SkCanvas_restore'>restore</a> calls plus one.
|
|
The save count of a new canvas is one.
|
|
|
|
### Return Value
|
|
|
|
depth of save state stack
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="005f2b207e078baac596681924fe591e">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
depth = 1
|
|
depth = 2
|
|
depth = 1
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_restoreToCount'>restoreToCount</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_restoreToCount'></a>
|
|
## restoreToCount
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_restoreToCount'>restoreToCount</a>(int saveCount)
|
|
</pre>
|
|
|
|
Restores state to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> values when <a href='#SkCanvas_save'>save</a>, <a href='#SkCanvas_saveLayer'>saveLayer</a>,
|
|
<a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a>, or <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> returned <a href='#SkCanvas_restoreToCount_saveCount'>saveCount</a>.
|
|
|
|
Does nothing if <a href='#SkCanvas_restoreToCount_saveCount'>saveCount</a> is greater than state stack count.
|
|
Restores state to initial values if <a href='#SkCanvas_restoreToCount_saveCount'>saveCount</a> is less than or equal to one.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_restoreToCount_saveCount'><code><strong>saveCount</strong></code></a></td>
|
|
<td>depth of state stack to restore</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9ed0d56436e114c7097fd49eed1aea47">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
depth = 1
|
|
depth = 3
|
|
depth = 1
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_getSaveCount'>getSaveCount</a> <a href='#SkCanvas_save'>save</a>
|
|
|
|
---
|
|
|
|
## <a name='Layer'>Layer</a>
|
|
|
|
<a href='#Layer'>Layer</a> allocates a temporary <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> to draw into. When the drawing is
|
|
complete, the <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> is drawn into the <a href='#Canvas'>Canvas</a>.
|
|
|
|
<a href='#Layer'>Layer</a> is saved in a stack along with other saved state. When state with a <a href='#Layer'>Layer</a>
|
|
is restored, the <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> is drawn into the previous <a href='#Layer'>Layer</a>.
|
|
|
|
<a href='#Layer'>Layer</a> may be initialized with the contents of the previous <a href='#Layer'>Layer</a>. When <a href='#Layer'>Layer</a> is
|
|
restored, its <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> can be modified by <a href='SkPaint_Reference#Paint'>Paint</a> passed to <a href='#Layer'>Layer</a> to apply
|
|
<a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>.
|
|
|
|
<a name='SkCanvas_saveLayer'></a>
|
|
## saveLayer
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkCanvas_saveLayer'>saveLayer</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
Saves <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> (<a href='undocumented#Draw_Filter'>Draw Filter</a> deprecated on most platforms),
|
|
and allocates a <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> for subsequent drawing.
|
|
Calling <a href='#SkCanvas_restore'>restore</a> discards changes to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>,
|
|
and draws the <a href='SkBitmap_Reference#Bitmap'>Bitmap</a>.
|
|
|
|
<a href='#Matrix'>Matrix</a> may be changed by <a href='#SkCanvas_translate'>translate</a>, <a href='#SkCanvas_scale'>scale</a>, <a href='#SkCanvas_rotate'>rotate</a>, <a href='#SkCanvas_skew'>skew</a>, <a href='#SkCanvas_concat'>concat</a>,
|
|
<a href='#SkCanvas_setMatrix'>setMatrix</a>, and <a href='#SkCanvas_resetMatrix'>resetMatrix</a>. <a href='#Clip'>Clip</a> may be changed by <a href='#SkCanvas_clipRect'>clipRect</a>, <a href='#SkCanvas_clipRRect'>clipRRect</a>,
|
|
<a href='#SkCanvas_clipPath'>clipPath</a>, <a href='#SkCanvas_clipRegion'>clipRegion</a>.
|
|
|
|
<a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_saveLayer_bounds'>bounds</a> suggests but does not define the <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> size. To clip drawing to
|
|
a specific rectangle, use <a href='#SkCanvas_clipRect'>clipRect</a>.
|
|
|
|
Optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_saveLayer_paint'>paint</a> applies <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> when <a href='#SkCanvas_restore'>restore</a> is called.
|
|
|
|
Call <a href='#SkCanvas_restoreToCount'>restoreToCount</a> with returned value to restore this and subsequent saves.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_saveLayer_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td>hint to limit the size of the <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_saveLayer_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>graphics state for <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
depth of saved stack
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="42318b18d403e17e07a541652da91ee2"><div>Rectangles are blurred by <a href='undocumented#Image_Filter'>Image Filter</a> when <a href='#SkCanvas_restore'>restore</a> draws <a href='#Layer'>Layer</a> to main
|
|
<a href='#Canvas'>Canvas</a>.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_saveLayer_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkCanvas_saveLayer'>saveLayer</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& bounds, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
Saves <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> (<a href='undocumented#Draw_Filter'>Draw Filter</a> deprecated on most platforms),
|
|
and allocates a <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> for subsequent drawing.
|
|
Calling <a href='#SkCanvas_restore'>restore</a> discards changes to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>,
|
|
and draws the <a href='SkBitmap_Reference#Bitmap'>Bitmap</a>.
|
|
|
|
<a href='#Matrix'>Matrix</a> may be changed by <a href='#SkCanvas_translate'>translate</a>, <a href='#SkCanvas_scale'>scale</a>, <a href='#SkCanvas_rotate'>rotate</a>, <a href='#SkCanvas_skew'>skew</a>, <a href='#SkCanvas_concat'>concat</a>,
|
|
<a href='#SkCanvas_setMatrix'>setMatrix</a>, and <a href='#SkCanvas_resetMatrix'>resetMatrix</a>. <a href='#Clip'>Clip</a> may be changed by <a href='#SkCanvas_clipRect'>clipRect</a>, <a href='#SkCanvas_clipRRect'>clipRRect</a>,
|
|
<a href='#SkCanvas_clipPath'>clipPath</a>, <a href='#SkCanvas_clipRegion'>clipRegion</a>.
|
|
|
|
<a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_saveLayer_2_bounds'>bounds</a> suggests but does not define the <a href='#Layer'>Layer</a> size. To clip drawing to
|
|
a specific rectangle, use <a href='#SkCanvas_clipRect'>clipRect</a>.
|
|
|
|
Optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_saveLayer_2_paint'>paint</a> applies <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> when <a href='#SkCanvas_restore'>restore</a> is called.
|
|
|
|
Call <a href='#SkCanvas_restoreToCount'>restoreToCount</a> with returned value to restore this and subsequent saves.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_saveLayer_2_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td>hint to limit the size of <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_saveLayer_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>graphics state for <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
depth of saved stack
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="a17aec3aa4909527be039e26a7eda694"><div>Rectangles are blurred by <a href='undocumented#Image_Filter'>Image Filter</a> when <a href='#SkCanvas_restore'>restore</a> draws <a href='#Layer'>Layer</a> to main <a href='#Canvas'>Canvas</a>.
|
|
The red rectangle is clipped; it does not fully fit on <a href='#Layer'>Layer</a>.
|
|
<a href='undocumented#Image_Filter'>Image Filter</a> blurs past edge of <a href='#Layer'>Layer</a> so red rectangle is blurred on all sides.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_saveLayerPreserveLCDTextRequests'></a>
|
|
## saveLayerPreserveLCDTextRequests
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
Saves <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> (<a href='undocumented#Draw_Filter'>Draw Filter</a> deprecated on most platforms),
|
|
and allocates a <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> for subsequent drawing.
|
|
<a href='SkPaint_Reference#LCD_Text'>LCD Text</a> is preserved when the <a href='#Layer'>Layer</a> is drawn to the prior <a href='#Layer'>Layer</a>.
|
|
|
|
Calling <a href='#SkCanvas_restore'>restore</a> discards changes to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>,
|
|
and draws <a href='#Layer'>Layer</a>.
|
|
|
|
<a href='#Matrix'>Matrix</a> may be changed by <a href='#SkCanvas_translate'>translate</a>, <a href='#SkCanvas_scale'>scale</a>, <a href='#SkCanvas_rotate'>rotate</a>, <a href='#SkCanvas_skew'>skew</a>, <a href='#SkCanvas_concat'>concat</a>,
|
|
<a href='#SkCanvas_setMatrix'>setMatrix</a>, and <a href='#SkCanvas_resetMatrix'>resetMatrix</a>. <a href='#Clip'>Clip</a> may be changed by <a href='#SkCanvas_clipRect'>clipRect</a>, <a href='#SkCanvas_clipRRect'>clipRRect</a>,
|
|
<a href='#SkCanvas_clipPath'>clipPath</a>, <a href='#SkCanvas_clipRegion'>clipRegion</a>.
|
|
|
|
<a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests_bounds'>bounds</a> suggests but does not define the <a href='#Layer'>Layer</a> size. To clip drawing to
|
|
a specific rectangle, use <a href='#SkCanvas_clipRect'>clipRect</a>.
|
|
|
|
Optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests_paint'>paint</a> applies <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> when <a href='#SkCanvas_restore'>restore</a> is called.
|
|
|
|
Call <a href='#SkCanvas_restoreToCount'>restoreToCount</a> with returned value to restore this and subsequent saves.
|
|
|
|
<a href='#Draw'>Draw</a> text on an opaque background so that <a href='SkPaint_Reference#LCD_Text'>LCD Text</a> blends correctly with the
|
|
prior <a href='#Layer'>Layer</a>. <a href='SkPaint_Reference#LCD_Text'>LCD Text</a> drawn on a background with transparency may result in
|
|
incorrect blending.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_saveLayerPreserveLCDTextRequests_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td>hint to limit the size of <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_saveLayerPreserveLCDTextRequests_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>graphics state for <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
depth of saved stack
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8460bf8b013f46c67e0bd96e13451aff"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_saveLayerAlpha'></a>
|
|
## saveLayerAlpha
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds, <a href='undocumented#U8CPU'>U8CPU</a> alpha)
|
|
</pre>
|
|
|
|
Saves <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> (<a href='undocumented#Draw_Filter'>Draw Filter</a> deprecated on most platforms),
|
|
and allocates <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> for subsequent drawing.
|
|
|
|
Calling <a href='#SkCanvas_restore'>restore</a> discards changes to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>,
|
|
and blends <a href='#Layer'>Layer</a> with <a href='#SkCanvas_saveLayerAlpha_alpha'>alpha</a> opacity onto prior <a href='#Layer'>Layer</a>.
|
|
|
|
<a href='#Matrix'>Matrix</a> may be changed by <a href='#SkCanvas_translate'>translate</a>, <a href='#SkCanvas_scale'>scale</a>, <a href='#SkCanvas_rotate'>rotate</a>, <a href='#SkCanvas_skew'>skew</a>, <a href='#SkCanvas_concat'>concat</a>,
|
|
<a href='#SkCanvas_setMatrix'>setMatrix</a>, and <a href='#SkCanvas_resetMatrix'>resetMatrix</a>. <a href='#Clip'>Clip</a> may be changed by <a href='#SkCanvas_clipRect'>clipRect</a>, <a href='#SkCanvas_clipRRect'>clipRRect</a>,
|
|
<a href='#SkCanvas_clipPath'>clipPath</a>, <a href='#SkCanvas_clipRegion'>clipRegion</a>.
|
|
|
|
<a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_saveLayerAlpha_bounds'>bounds</a> suggests but does not define <a href='#Layer'>Layer</a> size. To clip drawing to
|
|
a specific rectangle, use <a href='#SkCanvas_clipRect'>clipRect</a>.
|
|
|
|
<a href='#SkCanvas_saveLayerAlpha_alpha'>alpha</a> of zero is fully transparent, 255 is fully opaque.
|
|
|
|
Call <a href='#SkCanvas_restoreToCount'>restoreToCount</a> with returned value to restore this and subsequent saves.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_saveLayerAlpha_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td>hint to limit the size of <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_saveLayerAlpha_alpha'><code><strong>alpha</strong></code></a></td>
|
|
<td>opacity of <a href='#Layer'>Layer</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
depth of saved stack
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8ab88d86fb438856cc48d6e2f08a6e24"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a>
|
|
|
|
---
|
|
|
|
## <a name='SkCanvas_SaveLayerFlagsSet'>Enum SkCanvas::SaveLayerFlagsSet</a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
enum <a href='#SkCanvas_SaveLayerFlagsSet'>SaveLayerFlagsSet</a> {
|
|
<a href='#SkCanvas_kPreserveLCDText_SaveLayerFlag'>kPreserveLCDText SaveLayerFlag</a> = 1 << 1,
|
|
<a href='#SkCanvas_kInitWithPrevious_SaveLayerFlag'>kInitWithPrevious SaveLayerFlag</a> = 1 << 2,
|
|
<a href='#SkCanvas_kMaskAgainstCoverage_EXPERIMENTAL_DONT_USE_SaveLayerFlag'>kMaskAgainstCoverage EXPERIMENTAL DONT USE SaveLayerFlag</a> = 1 << 3,
|
|
<a href='#SkCanvas_kDontClipToLayer_Legacy_SaveLayerFlag'>kDontClipToLayer Legacy SaveLayerFlag</a> = kDontClipToLayer_PrivateSaveLayerFlag,
|
|
};
|
|
|
|
typedef uint32_t <a href='#SkCanvas_SaveLayerFlags'>SaveLayerFlags</a>;
|
|
</pre>
|
|
|
|
## <a name='SkCanvas_SaveLayerFlags'>Typedef SkCanvas::SaveLayerFlags</a>
|
|
<a href='#SkCanvas_SaveLayerFlags'>SaveLayerFlags</a> provides options that may be used in any combination in <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a>,
|
|
defining how <a href='#Layer'>Layer</a> allocated by <a href='#SkCanvas_saveLayer'>saveLayer</a> operates. It may be set to zero,
|
|
<a href='#SkCanvas_kPreserveLCDText_SaveLayerFlag'>kPreserveLCDText SaveLayerFlag</a>, <a href='#SkCanvas_kInitWithPrevious_SaveLayerFlag'>kInitWithPrevious SaveLayerFlag</a>, or both flags.
|
|
|
|
### Constants
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
|
|
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kPreserveLCDText_SaveLayerFlag'><code>SkCanvas::kPreserveLCDText_SaveLayerFlag</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Creates <a href='#Layer'>Layer</a> for LCD text. Flag is ignored if <a href='#Layer'>Layer</a> <a href='SkPaint_Reference#Paint'>Paint</a> contains
|
|
<a href='undocumented#Image_Filter'>Image Filter</a> or <a href='undocumented#Color_Filter'>Color Filter</a>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kInitWithPrevious_SaveLayerFlag'><code>SkCanvas::kInitWithPrevious_SaveLayerFlag</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>4</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Initializes <a href='#Layer'>Layer</a> with the contents of the previous <a href='#Layer'>Layer</a>.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kMaskAgainstCoverage_EXPERIMENTAL_DONT_USE_SaveLayerFlag'><code>SkCanvas::kMaskAgainstCoverage_EXPERIMENTAL_DONT_USE_SaveLayerFlag</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>8</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Experimental.
|
|
|
|
do not use</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kDontClipToLayer_Legacy_SaveLayerFlag'><code>SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0x80000000</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Deprecated.
|
|
|
|
soon</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="05db6a937225e8e31ae3481173d25dae"><div><a href='#Canvas'>Canvas</a> <a href='#Layer'>Layer</a> captures red and blue circles scaled up by four.
|
|
scalePaint blends <a href='#Layer'>Layer</a> back with transparency.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a> <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a>
|
|
|
|
## <a name='Layer_SaveLayerRec'>Layer SaveLayerRec</a>
|
|
|
|
# <a name='SkCanvas_SaveLayerRec'>Struct SkCanvas::SaveLayerRec</a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
struct <a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> {
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a>*(...
|
|
|
|
const <a href='SkRect_Reference#SkRect'>SkRect</a>* <a href='#SkCanvas_SaveLayerRec_fBounds'>fBounds</a>;
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* <a href='#SkCanvas_SaveLayerRec_fPaint'>fPaint</a>;
|
|
const <a href='undocumented#SkImageFilter'>SkImageFilter</a>* <a href='#SkCanvas_SaveLayerRec_fBackdrop'>fBackdrop</a>;
|
|
<a href='#SkCanvas_SaveLayerFlags'>SaveLayerFlags</a> <a href='#SkCanvas_SaveLayerRec_fSaveLayerFlags'>fSaveLayerFlags</a>;
|
|
};
|
|
</pre>
|
|
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> contains the state used to create the <a href='#Layer'>Layer</a>.
|
|
|
|
## <a name='Layer_SaveLayerRec_Overview'>Layer SaveLayerRec Overview</a>
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Layer_SaveLayerRec_Constructor'>Constructors</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>functions that construct <a href='#SkCanvas_SaveLayerRec'>SkCanvas::SaveLayerRec</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Layer_SaveLayerRec_Member'>Members</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>member values</td>
|
|
</tr>
|
|
</table>
|
|
|
|
|
|
## <a name='Layer_SaveLayerRec_Member'>Layer SaveLayerRec Member</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
</table>
|
|
|
|
### Members
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Type</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Name</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const SkRect*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_SaveLayerRec_fBounds'><code>fBounds</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
<a href='#SkCanvas_SaveLayerRec_fBounds'>fBounds</a> is used as a hint to limit the size of <a href='#Layer'>Layer</a>; may be nullptr.
|
|
<a href='#SkCanvas_SaveLayerRec_fBounds'>fBounds</a> suggests but does not define <a href='#Layer'>Layer</a> size. To clip drawing to
|
|
a specific rectangle, use <a href='#SkCanvas_clipRect'>clipRect</a>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const SkPaint*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_SaveLayerRec_fPaint'><code>fPaint</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
<a href='#SkCanvas_SaveLayerRec_fPaint'>fPaint</a> modifies how <a href='#Layer'>Layer</a> overlays the prior <a href='#Layer'>Layer</a>; may be nullptr.
|
|
<a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Draw_Looper'>Draw Looper</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and
|
|
<a href='undocumented#Mask_Filter'>Mask Filter</a> affect <a href='#Layer'>Layer</a> draw.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const SkImageFilter*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_SaveLayerRec_fBackdrop'><code>fBackdrop</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
<a href='#SkCanvas_SaveLayerRec_fBackdrop'>fBackdrop</a> applies <a href='undocumented#Image_Filter'>Image Filter</a> to the prior <a href='#Layer'>Layer</a> when copying to the <a href='#Layer'>Layer</a>;
|
|
may be nullptr. Use <a href='#SkCanvas_kInitWithPrevious_SaveLayerFlag'>kInitWithPrevious SaveLayerFlag</a> to copy the
|
|
prior <a href='#Layer'>Layer</a> without an <a href='undocumented#Image_Filter'>Image Filter</a>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const SkImage*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_SaveLayerRec_fClipMask'><code>fClipMask</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
<a href='#SkCanvas_restore'>restore</a> clips <a href='#Layer'>Layer</a> by the <a href='SkColor_Reference#Alpha'>Color Alpha</a> channel of <a href='#SkCanvas_SaveLayerRec_fClipMask'>fClipMask</a> when
|
|
<a href='#Layer'>Layer</a> is copied to <a href='undocumented#Device'>Device</a>. <a href='#SkCanvas_SaveLayerRec_fClipMask'>fClipMask</a> may be nullptr. .
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const SkMatrix*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_SaveLayerRec_fClipMatrix'><code>fClipMatrix</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
<a href='#SkCanvas_SaveLayerRec_fClipMatrix'>fClipMatrix</a> transforms <a href='#SkCanvas_SaveLayerRec_fClipMask'>fClipMask</a> before it clips <a href='#Layer'>Layer</a>. If
|
|
<a href='#SkCanvas_SaveLayerRec_fClipMask'>fClipMask</a> describes a translucent gradient, it may be scaled and rotated
|
|
without introducing artifacts. <a href='#SkCanvas_SaveLayerRec_fClipMatrix'>fClipMatrix</a> may be nullptr.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SaveLayerFlags</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_SaveLayerRec_fSaveLayerFlags'><code>fSaveLayerFlags</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
<a href='#SkCanvas_SaveLayerRec_fSaveLayerFlags'>fSaveLayerFlags</a> are used to create <a href='#Layer'>Layer</a> without transparency,
|
|
create <a href='#Layer'>Layer</a> for LCD text, and to create <a href='#Layer'>Layer</a> with the
|
|
contents of the previous <a href='#Layer'>Layer</a>.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="ee8c0b120234e27364f8c9a786cf8f89"><div><a href='#Canvas'>Canvas</a> <a href='#Layer'>Layer</a> captures a red <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> circle and a blue <a href='undocumented#Alias'>Aliased</a> circle scaled
|
|
up by four. After drawing another red circle without scaling on top, the <a href='#Layer'>Layer</a> is
|
|
transferred to the main canvas.
|
|
</div></fiddle-embed></div>
|
|
|
|
## <a name='Layer_SaveLayerRec_Constructor'>Layer SaveLayerRec Constructor</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_SaveLayerRec_empty_constructor'></a>
|
|
## SaveLayerRec
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a>()
|
|
</pre>
|
|
|
|
Sets <a href='#SkCanvas_SaveLayerRec_fBounds'>fBounds</a>, <a href='#SkCanvas_SaveLayerRec_fPaint'>fPaint</a>, and <a href='#SkCanvas_SaveLayerRec_fBackdrop'>fBackdrop</a> to nullptr. Clears <a href='#SkCanvas_SaveLayerRec_fSaveLayerFlags'>fSaveLayerFlags</a>.
|
|
|
|
### Return Value
|
|
|
|
empty <a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="b5cea1eed80a0eb04ddbab3f36dff73f">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
rec1 == rec2
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_const_SkRect_star_const_SkPaint_star'></a>
|
|
## SaveLayerRec
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint, <a href='#SkCanvas_SaveLayerFlags'>SaveLayerFlags</a> saveLayerFlags = 0)
|
|
</pre>
|
|
|
|
Sets <a href='#SkCanvas_SaveLayerRec_fBounds'>fBounds</a>, <a href='#SkCanvas_SaveLayerRec_fPaint'>fPaint</a>, and <a href='#SkCanvas_SaveLayerRec_fSaveLayerFlags'>fSaveLayerFlags</a>; sets <a href='#SkCanvas_SaveLayerRec_fBackdrop'>fBackdrop</a> to nullptr.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td><a href='#Layer'>Layer</a> dimensions; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>applied to <a href='#Layer'>Layer</a> when overlaying prior <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_saveLayerFlags'><code><strong>saveLayerFlags</strong></code></a></td>
|
|
<td><a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> options to modify <a href='#Layer'>Layer</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> with empty backdrop
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="027f920259888fc19591ea9a90d92873">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
rec1 == rec2
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star'></a>
|
|
## SaveLayerRec
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint, const <a href='undocumented#SkImageFilter'>SkImageFilter</a>* backdrop,
|
|
<a href='#SkCanvas_SaveLayerFlags'>SaveLayerFlags</a> saveLayerFlags)
|
|
</pre>
|
|
|
|
Sets <a href='#SkCanvas_SaveLayerRec_fBounds'>fBounds</a>, <a href='#SkCanvas_SaveLayerRec_fPaint'>fPaint</a>, <a href='#SkCanvas_SaveLayerRec_fBackdrop'>fBackdrop</a>, and <a href='#SkCanvas_SaveLayerRec_fSaveLayerFlags'>fSaveLayerFlags</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td><a href='#Layer'>Layer</a> dimensions; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>applied to <a href='#Layer'>Layer</a> when overlaying prior <a href='#Layer'>Layer</a>;
|
|
may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_backdrop'><code><strong>backdrop</strong></code></a></td>
|
|
<td>prior <a href='#Layer'>Layer</a> copied with <a href='undocumented#Image_Filter'>Image Filter</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_saveLayerFlags'><code><strong>saveLayerFlags</strong></code></a></td>
|
|
<td><a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> options to modify <a href='#Layer'>Layer</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> fully specified
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9b7fa2fe855642ffff6538829db15328">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
rec1 == rec2
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star'></a>
|
|
## SaveLayerRec
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint, const <a href='undocumented#SkImageFilter'>SkImageFilter</a>* backdrop,
|
|
const <a href='SkImage_Reference#SkImage'>SkImage</a>* clipMask, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* clipMatrix, <a href='#SkCanvas_SaveLayerFlags'>SaveLayerFlags</a> saveLayerFlags)
|
|
</pre>
|
|
|
|
Experimental.
|
|
|
|
not readySets <a href='#SkCanvas_SaveLayerRec_fBounds'>fBounds</a>, <a href='#SkCanvas_SaveLayerRec_fPaint'>fPaint</a>, <a href='#SkCanvas_SaveLayerRec_fBackdrop'>fBackdrop</a>, <a href='#SkCanvas_SaveLayerRec_fClipMask'>fClipMask</a>, <a href='#SkCanvas_SaveLayerRec_fClipMatrix'>fClipMatrix</a>, and <a href='#SkCanvas_SaveLayerRec_fSaveLayerFlags'>fSaveLayerFlags</a>.
|
|
<a href='#SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_clipMatrix'>clipMatrix</a> uses <a href='SkColor_Reference#Alpha'>Color Alpha</a> channel of image, transformed by <a href='#SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_clipMatrix'>clipMatrix</a>, to clip
|
|
<a href='#Layer'>Layer</a> when drawn to <a href='#Canvas'>Canvas</a>.
|
|
|
|
Implementation is not complete; has no effect if <a href='undocumented#Device'>Device</a> is GPU-backed.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td><a href='#Layer'>Layer</a> dimensions; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>graphics state applied to <a href='#Layer'>Layer</a> when overlaying prior
|
|
<a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_backdrop'><code><strong>backdrop</strong></code></a></td>
|
|
<td>prior <a href='#Layer'>Layer</a> copied with <a href='undocumented#Image_Filter'>Image Filter</a>;
|
|
may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_clipMask'><code><strong>clipMask</strong></code></a></td>
|
|
<td>clip applied to <a href='#Layer'>Layer</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_clipMatrix'><code><strong>clipMatrix</strong></code></a></td>
|
|
<td>matrix applied to <a href='#SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_clipMask'>clipMask</a>; may be nullptr to use
|
|
identity matrix</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_const_SkRect_star_const_SkPaint_star_const_SkImageFilter_star_const_SkImage_star_const_SkMatrix_star_saveLayerFlags'><code><strong>saveLayerFlags</strong></code></a></td>
|
|
<td><a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> options to modify <a href='#Layer'>Layer</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
<a href='#SkCanvas_SaveLayerRec_empty_constructor'>SaveLayerRec</a> fully specified
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_saveLayer_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkCanvas_saveLayer'>saveLayer</a>(const <a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a>& layerRec)
|
|
</pre>
|
|
|
|
Saves <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a> (<a href='undocumented#Draw_Filter'>Draw Filter</a> deprecated on most platforms),
|
|
and allocates <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> for subsequent drawing.
|
|
|
|
Calling <a href='#SkCanvas_restore'>restore</a> discards changes to <a href='#Matrix'>Matrix</a>, <a href='#Clip'>Clip</a>, and <a href='undocumented#Draw_Filter'>Draw Filter</a>,
|
|
and blends <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> with <a href='SkColor_Reference#Alpha'>Color Alpha</a> opacity onto the prior <a href='#Layer'>Layer</a>.
|
|
|
|
<a href='#Matrix'>Matrix</a> may be changed by <a href='#SkCanvas_translate'>translate</a>, <a href='#SkCanvas_scale'>scale</a>, <a href='#SkCanvas_rotate'>rotate</a>, <a href='#SkCanvas_skew'>skew</a>, <a href='#SkCanvas_concat'>concat</a>,
|
|
<a href='#SkCanvas_setMatrix'>setMatrix</a>, and <a href='#SkCanvas_resetMatrix'>resetMatrix</a>. <a href='#Clip'>Clip</a> may be changed by <a href='#SkCanvas_clipRect'>clipRect</a>, <a href='#SkCanvas_clipRRect'>clipRRect</a>,
|
|
<a href='#SkCanvas_clipPath'>clipPath</a>, <a href='#SkCanvas_clipRegion'>clipRegion</a>.
|
|
|
|
<a href='#SkCanvas_SaveLayerRec'>SaveLayerRec</a> contains the state used to create the <a href='#Layer'>Layer</a>.
|
|
|
|
Call <a href='#SkCanvas_restoreToCount'>restoreToCount</a> with returned value to restore this and subsequent saves.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_saveLayer_3_layerRec'><code><strong>layerRec</strong></code></a></td>
|
|
<td><a href='#Layer'>Layer</a> state</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
depth of save state stack
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7d3751e82d1b6ec328ffa3d6f48ca831"><div>The example draws an image, and saves it into a <a href='#Layer'>Layer</a> with <a href='#SkCanvas_kInitWithPrevious_SaveLayerFlag'>kInitWithPrevious SaveLayerFlag</a>.
|
|
Next it punches a hole in <a href='#Layer'>Layer</a> and restore with <a href='SkBlendMode_Reference#SkBlendMode_kPlus'>SkBlendMode::kPlus</a>.
|
|
Where <a href='#Layer'>Layer</a> was cleared, the original image will draw unchanged.
|
|
Outside of the circle the mandrill is brightened.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_save'>save</a> <a href='#SkCanvas_restore'>restore</a> <a href='#SkCanvas_saveLayer'>saveLayer</a><sup><a href='#SkCanvas_saveLayer_2'>[2]</a></sup><sup><a href='#SkCanvas_saveLayer_3'>[3]</a></sup> <a href='#SkCanvas_saveLayerPreserveLCDTextRequests'>saveLayerPreserveLCDTextRequests</a> <a href='#SkCanvas_saveLayerAlpha'>saveLayerAlpha</a>
|
|
|
|
---
|
|
|
|
## <a name='Matrix'>Matrix</a>
|
|
|
|
<a name='SkCanvas_translate'></a>
|
|
## translate
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_translate'>translate</a>(<a href='undocumented#SkScalar'>SkScalar</a> dx, <a href='undocumented#SkScalar'>SkScalar</a> dy)
|
|
</pre>
|
|
|
|
Translate <a href='#Matrix'>Matrix</a> by <a href='#SkCanvas_translate_dx'>dx</a> along the x-axis and <a href='#SkCanvas_translate_dy'>dy</a> along the y-axis.
|
|
|
|
Mathematically, replace <a href='#Matrix'>Matrix</a> with a translation matrix
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> with <a href='#Matrix'>Matrix</a>.
|
|
|
|
This has the effect of moving the drawing by (<a href='#SkCanvas_translate_dx'>dx</a>, <a href='#SkCanvas_translate_dy'>dy</a>) before transforming
|
|
the result with <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_translate_dx'><code><strong>dx</strong></code></a></td>
|
|
<td>distance to translate in x</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_translate_dy'><code><strong>dy</strong></code></a></td>
|
|
<td>distance to translate in y</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="eb93d5fa66a5f7a10f4f9210494d7222"><div><a href='#SkCanvas_scale'>scale</a> followed by <a href='#SkCanvas_translate'>translate</a> produces different results from <a href='#SkCanvas_translate'>translate</a> followed
|
|
by <a href='#SkCanvas_scale'>scale</a>.
|
|
|
|
The blue stroke follows translate of (50, 50); a black
|
|
fill follows scale of (2, 1/2.f). After restoring the clip, which resets
|
|
<a href='#Matrix'>Matrix</a>, a red frame follows the same scale of (2, 1/2.f); a gray fill
|
|
follows translate of (50, 50).
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_concat'>concat</a> <a href='#SkCanvas_scale'>scale</a> <a href='#SkCanvas_skew'>skew</a> <a href='#SkCanvas_rotate'>rotate</a><sup><a href='#SkCanvas_rotate_2'>[2]</a></sup> <a href='#SkCanvas_setMatrix'>setMatrix</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_scale'></a>
|
|
## scale
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_scale'>scale</a>(<a href='undocumented#SkScalar'>SkScalar</a> sx, <a href='undocumented#SkScalar'>SkScalar</a> sy)
|
|
</pre>
|
|
|
|
Scale <a href='#Matrix'>Matrix</a> by <a href='#SkCanvas_scale_sx'>sx</a> on the x-axis and <a href='#SkCanvas_scale_sy'>sy</a> on the y-axis.
|
|
|
|
Mathematically, replace <a href='#Matrix'>Matrix</a> with a scale matrix
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> with <a href='#Matrix'>Matrix</a>.
|
|
|
|
This has the effect of scaling the drawing by (<a href='#SkCanvas_scale_sx'>sx</a>, <a href='#SkCanvas_scale_sy'>sy</a>) before transforming
|
|
the result with <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_scale_sx'><code><strong>sx</strong></code></a></td>
|
|
<td>amount to scale in x</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_scale_sy'><code><strong>sy</strong></code></a></td>
|
|
<td>amount to scale in y</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7d0d801ef13c6c6da51e840c22ac15b0"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_concat'>concat</a> <a href='#SkCanvas_translate'>translate</a> <a href='#SkCanvas_skew'>skew</a> <a href='#SkCanvas_rotate'>rotate</a><sup><a href='#SkCanvas_rotate_2'>[2]</a></sup> <a href='#SkCanvas_setMatrix'>setMatrix</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_rotate'></a>
|
|
## rotate
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_rotate'>rotate</a>(<a href='undocumented#SkScalar'>SkScalar</a> degrees)
|
|
</pre>
|
|
|
|
Rotate <a href='#Matrix'>Matrix</a> by <a href='#SkCanvas_rotate_degrees'>degrees</a>. Positive <a href='#SkCanvas_rotate_degrees'>degrees</a> rotates clockwise.
|
|
|
|
Mathematically, replace <a href='#Matrix'>Matrix</a> with a rotation matrix
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> with <a href='#Matrix'>Matrix</a>.
|
|
|
|
This has the effect of rotating the drawing by <a href='#SkCanvas_rotate_degrees'>degrees</a> before transforming
|
|
the result with <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_rotate_degrees'><code><strong>degrees</strong></code></a></td>
|
|
<td>amount to rotate, in <a href='#SkCanvas_rotate_degrees'>degrees</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="963789ac8498d4e505748ab3b15cdaa5"><div><a href='#Draw'>Draw</a> clock hands at time 5:10. The hour hand and minute hand point up and
|
|
are rotated clockwise.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_concat'>concat</a> <a href='#SkCanvas_translate'>translate</a> <a href='#SkCanvas_skew'>skew</a> <a href='#SkCanvas_scale'>scale</a> <a href='#SkCanvas_setMatrix'>setMatrix</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_rotate_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_rotate'>rotate</a>(<a href='undocumented#SkScalar'>SkScalar</a> degrees, <a href='undocumented#SkScalar'>SkScalar</a> px, <a href='undocumented#SkScalar'>SkScalar</a> py)
|
|
</pre>
|
|
|
|
Rotate <a href='#Matrix'>Matrix</a> by <a href='#SkCanvas_rotate_2_degrees'>degrees</a> about a point at (<a href='#SkCanvas_rotate_2_px'>px</a>, <a href='#SkCanvas_rotate_2_py'>py</a>). Positive <a href='#SkCanvas_rotate_2_degrees'>degrees</a> rotates
|
|
clockwise.
|
|
|
|
Mathematically, construct a rotation matrix. <a href='undocumented#Premultiply'>Premultiply</a> the rotation matrix by
|
|
a translation matrix, then replace <a href='#Matrix'>Matrix</a> with the resulting matrix
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> with <a href='#Matrix'>Matrix</a>.
|
|
|
|
This has the effect of rotating the drawing about a given point before
|
|
transforming the result with <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_rotate_2_degrees'><code><strong>degrees</strong></code></a></td>
|
|
<td>amount to rotate, in <a href='#SkCanvas_rotate_2_degrees'>degrees</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_rotate_2_px'><code><strong>px</strong></code></a></td>
|
|
<td>x-axis value of the point to rotate about</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_rotate_2_py'><code><strong>py</strong></code></a></td>
|
|
<td>y-axis value of the point to rotate about</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="bcf5baea1c66a957d5ffd7b54bbbfeff"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_concat'>concat</a> <a href='#SkCanvas_translate'>translate</a> <a href='#SkCanvas_skew'>skew</a> <a href='#SkCanvas_scale'>scale</a> <a href='#SkCanvas_setMatrix'>setMatrix</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_skew'></a>
|
|
## skew
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_skew'>skew</a>(<a href='undocumented#SkScalar'>SkScalar</a> sx, <a href='undocumented#SkScalar'>SkScalar</a> sy)
|
|
</pre>
|
|
|
|
Skew <a href='#Matrix'>Matrix</a> by <a href='#SkCanvas_skew_sx'>sx</a> on the x-axis and <a href='#SkCanvas_skew_sy'>sy</a> on the y-axis. A positive value of <a href='#SkCanvas_skew_sx'>sx</a>
|
|
skews the drawing right as y-axis values increase; a positive value of <a href='#SkCanvas_skew_sy'>sy</a> skews
|
|
the drawing down as x-axis values increase.
|
|
|
|
Mathematically, replace <a href='#Matrix'>Matrix</a> with a skew matrix <a href='undocumented#Premultiply'>Premultiplied</a> with <a href='#Matrix'>Matrix</a>.
|
|
|
|
This has the effect of skewing the drawing by (<a href='#SkCanvas_skew_sx'>sx</a>, <a href='#SkCanvas_skew_sy'>sy</a>) before transforming
|
|
the result with <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_skew_sx'><code><strong>sx</strong></code></a></td>
|
|
<td>amount to skew on x-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_skew_sy'><code><strong>sy</strong></code></a></td>
|
|
<td>amount to skew on y-axis</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="2e2acc21d7774df7e0940a30ad2ca99e"><div>Black text mimics an oblique text style by using a negative skew on x-axis
|
|
that shifts the geometry to the right as the y-axis values decrease.
|
|
Red text uses a positive skew on y-axis to shift the geometry down
|
|
as the x-axis values increase.
|
|
Blue text combines <a href='#SkCanvas_skew_sx'>sx</a> and <a href='#SkCanvas_skew_sy'>sy</a> skew to rotate and scale.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_concat'>concat</a> <a href='#SkCanvas_translate'>translate</a> <a href='#SkCanvas_rotate'>rotate</a><sup><a href='#SkCanvas_rotate_2'>[2]</a></sup> <a href='#SkCanvas_scale'>scale</a> <a href='#SkCanvas_setMatrix'>setMatrix</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_concat'></a>
|
|
## concat
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_concat'>concat</a>(const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>& matrix)
|
|
</pre>
|
|
|
|
Replace <a href='#Matrix'>Matrix</a> with <a href='#SkCanvas_concat_matrix'>matrix</a> <a href='undocumented#Premultiply'>Premultiplied</a> with existing <a href='#Matrix'>Matrix</a>.
|
|
|
|
This has the effect of transforming the drawn geometry by <a href='#SkCanvas_concat_matrix'>matrix</a>, before
|
|
transforming the result with existing <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_concat_matrix'><code><strong>matrix</strong></code></a></td>
|
|
<td><a href='#SkCanvas_concat_matrix'>matrix</a> to <a href='undocumented#Premultiply'>Premultiply</a> with existing <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8f6818b25a92a88638ad99b2dd293f61"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_translate'>translate</a> <a href='#SkCanvas_rotate'>rotate</a><sup><a href='#SkCanvas_rotate_2'>[2]</a></sup> <a href='#SkCanvas_scale'>scale</a> <a href='#SkCanvas_skew'>skew</a> <a href='#SkCanvas_setMatrix'>setMatrix</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_setMatrix'></a>
|
|
## setMatrix
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_setMatrix'>setMatrix</a>(const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>& matrix)
|
|
</pre>
|
|
|
|
Replace <a href='#Matrix'>Matrix</a> with <a href='#SkCanvas_setMatrix_matrix'>matrix</a>.
|
|
Unlike <a href='#SkCanvas_concat'>concat</a>, any prior <a href='#SkCanvas_setMatrix_matrix'>matrix</a> state is overwritten.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_setMatrix_matrix'><code><strong>matrix</strong></code></a></td>
|
|
<td><a href='#SkCanvas_setMatrix_matrix'>matrix</a> to copy, replacing existing <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="24b9cf7e6f9a08394e1e07413bd8733a"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_resetMatrix'>resetMatrix</a> <a href='#SkCanvas_concat'>concat</a> <a href='#SkCanvas_translate'>translate</a> <a href='#SkCanvas_rotate'>rotate</a><sup><a href='#SkCanvas_rotate_2'>[2]</a></sup> <a href='#SkCanvas_scale'>scale</a> <a href='#SkCanvas_skew'>skew</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_resetMatrix'></a>
|
|
## resetMatrix
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_resetMatrix'>resetMatrix</a>()
|
|
</pre>
|
|
|
|
Sets <a href='#Matrix'>Matrix</a> to the identity matrix.
|
|
Any prior matrix state is overwritten.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="412afffdf4682baa503a4e2e99201967"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_setMatrix'>setMatrix</a> <a href='#SkCanvas_concat'>concat</a> <a href='#SkCanvas_translate'>translate</a> <a href='#SkCanvas_rotate'>rotate</a><sup><a href='#SkCanvas_rotate_2'>[2]</a></sup> <a href='#SkCanvas_scale'>scale</a> <a href='#SkCanvas_skew'>skew</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getTotalMatrix'></a>
|
|
## getTotalMatrix
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>& <a href='#SkCanvas_getTotalMatrix'>getTotalMatrix</a>() const
|
|
</pre>
|
|
|
|
Returns <a href='#Matrix'>Matrix</a>.
|
|
This does not account for translation by <a href='undocumented#Device'>Device</a> or <a href='SkSurface_Reference#Surface'>Surface</a>.
|
|
|
|
### Return Value
|
|
|
|
<a href='#Matrix'>Matrix</a> in <a href='#Canvas'>Canvas</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="c0d5fa544759704768f47cac91ae3832">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
isIdentity true
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_setMatrix'>setMatrix</a> <a href='#SkCanvas_resetMatrix'>resetMatrix</a> <a href='#SkCanvas_concat'>concat</a>
|
|
|
|
---
|
|
|
|
## <a name='Clip'>Clip</a>
|
|
|
|
<a href='#Clip'>Clip</a> is built from a stack of clipping paths. Each <a href='SkPath_Reference#Path'>Path</a> in the
|
|
stack can be constructed from one or more <a href='SkPath_Reference#Contour'>Path Contour</a> elements. The
|
|
<a href='SkPath_Reference#Contour'>Path Contour</a> may be composed of any number of <a href='SkPath_Reference#Verb'>Path Verb</a> segments. Each
|
|
<a href='SkPath_Reference#Contour'>Path Contour</a> forms a closed area; <a href='SkPath_Reference#Fill_Type'>Path Fill Type</a> defines the area enclosed
|
|
by <a href='SkPath_Reference#Contour'>Path Contour</a>.
|
|
|
|
<a href='#Clip'>Clip</a> stack of <a href='SkPath_Reference#Path'>Path</a> elements successfully restrict the <a href='SkPath_Reference#Path'>Path</a> area. Each
|
|
<a href='SkPath_Reference#Path'>Path</a> is transformed by <a href='#Matrix'>Matrix</a>, then intersected with or subtracted from the
|
|
prior <a href='#Clip'>Clip</a> to form the replacement <a href='#Clip'>Clip</a>. Use <a href='undocumented#SkClipOp_kDifference'>SkClipOp::kDifference</a>
|
|
to subtract <a href='SkPath_Reference#Path'>Path</a> from <a href='#Clip'>Clip</a>; use <a href='undocumented#SkClipOp_kIntersect'>SkClipOp::kIntersect</a> to intersect <a href='SkPath_Reference#Path'>Path</a>
|
|
with <a href='#Clip'>Clip</a>.
|
|
|
|
A clipping <a href='SkPath_Reference#Path'>Path</a> may be <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a>; if <a href='SkPath_Reference#Path'>Path</a>, after transformation, is
|
|
composed of horizontal and vertical lines, clearing <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a> allows whole pixels
|
|
to either be inside or outside the clip. The fastest drawing has a <a href='undocumented#Alias'>Aliased</a>,
|
|
rectangular clip.
|
|
|
|
If clipping <a href='SkPath_Reference#Path'>Path</a> has <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a> set, clip may partially clip a pixel, requiring
|
|
that drawing blend partially with the destination along the edge. A rotated
|
|
rectangular <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> clip looks smoother but draws slower.
|
|
|
|
<a href='#Clip'>Clip</a> can combine with <a href='SkRect_Reference#Rect'>Rect</a> and <a href='SkRRect_Reference#RRect'>Round Rect</a> primitives; like
|
|
<a href='SkPath_Reference#Path'>Path</a>, these are transformed by <a href='#Matrix'>Matrix</a> before they are combined with <a href='#Clip'>Clip</a>.
|
|
|
|
<a href='#Clip'>Clip</a> can combine with <a href='undocumented#Region'>Region</a>. <a href='undocumented#Region'>Region</a> is assumed to be in <a href='undocumented#Device'>Device</a> coordinates
|
|
and is unaffected by <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="862cc026601a41a58df49c0b9f0d7777"><div><a href='#Draw'>Draw</a> a red circle with an <a href='undocumented#Alias'>Aliased</a> clip and an <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> clip.
|
|
Use an image filter to zoom into the pixels drawn.
|
|
The edge of the <a href='undocumented#Alias'>Aliased</a> clip fully draws pixels in the red circle.
|
|
The edge of the <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> clip partially draws pixels in the red circle.
|
|
</div></fiddle-embed></div>
|
|
|
|
<a name='SkCanvas_clipRect'></a>
|
|
## clipRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipRect'>clipRect</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect, <a href='undocumented#SkClipOp'>SkClipOp</a> op, bool doAntiAlias)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection or difference of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipRect_rect'>rect</a>,
|
|
with an <a href='undocumented#Alias'>Aliased</a> or <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> clip edge. <a href='#SkCanvas_clipRect_rect'>rect</a> is transformed by <a href='#Matrix'>Matrix</a>
|
|
before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipRect_rect'><code><strong>rect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRect_op'><code><strong>op</strong></code></a></td>
|
|
<td><a href='undocumented#Clip_Op'>Clip Op</a> to apply to <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRect_doAntiAlias'><code><strong>doAntiAlias</strong></code></a></td>
|
|
<td>true if <a href='#Clip'>Clip</a> is to be <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="6a614faa0fbcf19958b5559c19b02d0f"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRRect'>clipRRect</a><sup><a href='#SkCanvas_clipRRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRRect_3'>[3]</a></sup> <a href='#SkCanvas_clipPath'>clipPath</a><sup><a href='#SkCanvas_clipPath_2'>[2]</a></sup><sup><a href='#SkCanvas_clipPath_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipRect_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipRect'>clipRect</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect, <a href='undocumented#SkClipOp'>SkClipOp</a> op)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection or difference of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipRect_2_rect'>rect</a>.
|
|
Resulting <a href='#Clip'>Clip</a> is <a href='undocumented#Alias'>Aliased</a>; pixels are fully contained by the clip.
|
|
<a href='#SkCanvas_clipRect_2_rect'>rect</a> is transformed by <a href='#Matrix'>Matrix</a> before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipRect_2_rect'><code><strong>rect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRect_2_op'><code><strong>op</strong></code></a></td>
|
|
<td><a href='undocumented#Clip_Op'>Clip Op</a> to apply to <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="13bbc5fa5597a6cd4d704b419dbc66d9"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRRect'>clipRRect</a><sup><a href='#SkCanvas_clipRRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRRect_3'>[3]</a></sup> <a href='#SkCanvas_clipPath'>clipPath</a><sup><a href='#SkCanvas_clipPath_2'>[2]</a></sup><sup><a href='#SkCanvas_clipPath_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipRect_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipRect'>clipRect</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect, bool doAntiAlias = false)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipRect_3_rect'>rect</a>.
|
|
Resulting <a href='#Clip'>Clip</a> is <a href='undocumented#Alias'>Aliased</a>; pixels are fully contained by the clip.
|
|
<a href='#SkCanvas_clipRect_3_rect'>rect</a> is transformed by <a href='#Matrix'>Matrix</a>
|
|
before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipRect_3_rect'><code><strong>rect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRect_3_doAntiAlias'><code><strong>doAntiAlias</strong></code></a></td>
|
|
<td>true if <a href='#Clip'>Clip</a> is to be <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1d4e0632c97e42692775d834fe10aa99"><div>A circle drawn in pieces looks uniform when drawn <a href='undocumented#Alias'>Aliased</a>.
|
|
The same circle pieces blend with pixels more than once when <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a>,
|
|
visible as a thin pair of lines through the right circle.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRRect'>clipRRect</a><sup><a href='#SkCanvas_clipRRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRRect_3'>[3]</a></sup> <a href='#SkCanvas_clipPath'>clipPath</a><sup><a href='#SkCanvas_clipPath_2'>[2]</a></sup><sup><a href='#SkCanvas_clipPath_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_androidFramework_setDeviceClipRestriction'></a>
|
|
## androidFramework_setDeviceClipRestriction
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_androidFramework_setDeviceClipRestriction'>androidFramework setDeviceClipRestriction</a>(const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& rect)
|
|
</pre>
|
|
|
|
Sets the maximum clip rectangle, which can be set by <a href='#SkCanvas_clipRect'>clipRect</a>, <a href='#SkCanvas_clipRRect'>clipRRect</a> and
|
|
<a href='#SkCanvas_clipPath'>clipPath</a> and intersect the current clip with the specified <a href='#SkCanvas_androidFramework_setDeviceClipRestriction_rect'>rect</a>.
|
|
The maximum clip affects only future clipping operations; it is not retroactive.
|
|
The clip restriction is not recorded in pictures.
|
|
|
|
Pass an empty <a href='#SkCanvas_androidFramework_setDeviceClipRestriction_rect'>rect</a> to disable maximum clip.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_androidFramework_setDeviceClipRestriction_rect'><code><strong>rect</strong></code></a></td>
|
|
<td>maximum allowed clip in device coordinates</td>
|
|
</tr>
|
|
#
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipRRect'></a>
|
|
## clipRRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipRRect'>clipRRect</a>(const <a href='SkRRect_Reference#SkRRect'>SkRRect</a>& rrect, <a href='undocumented#SkClipOp'>SkClipOp</a> op, bool doAntiAlias)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection or difference of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipRRect_rrect'>rrect</a>,
|
|
with an <a href='undocumented#Alias'>Aliased</a> or <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> clip edge.
|
|
<a href='#SkCanvas_clipRRect_rrect'>rrect</a> is transformed by <a href='#Matrix'>Matrix</a>
|
|
before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipRRect_rrect'><code><strong>rrect</strong></code></a></td>
|
|
<td><a href='SkRRect_Reference#RRect'>Round Rect</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRRect_op'><code><strong>op</strong></code></a></td>
|
|
<td><a href='undocumented#Clip_Op'>Clip Op</a> to apply to <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRRect_doAntiAlias'><code><strong>doAntiAlias</strong></code></a></td>
|
|
<td>true if <a href='#Clip'>Clip</a> is to be <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="182ef48ab5e04ba3578496fda8d9fa36"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRect'>clipRect</a><sup><a href='#SkCanvas_clipRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRect_3'>[3]</a></sup> <a href='#SkCanvas_clipPath'>clipPath</a><sup><a href='#SkCanvas_clipPath_2'>[2]</a></sup><sup><a href='#SkCanvas_clipPath_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipRRect_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipRRect'>clipRRect</a>(const <a href='SkRRect_Reference#SkRRect'>SkRRect</a>& rrect, <a href='undocumented#SkClipOp'>SkClipOp</a> op)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection or difference of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipRRect_2_rrect'>rrect</a>.
|
|
Resulting <a href='#Clip'>Clip</a> is <a href='undocumented#Alias'>Aliased</a>; pixels are fully contained by the clip.
|
|
<a href='#SkCanvas_clipRRect_2_rrect'>rrect</a> is transformed by <a href='#Matrix'>Matrix</a> before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipRRect_2_rrect'><code><strong>rrect</strong></code></a></td>
|
|
<td><a href='SkRRect_Reference#RRect'>Round Rect</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRRect_2_op'><code><strong>op</strong></code></a></td>
|
|
<td><a href='undocumented#Clip_Op'>Clip Op</a> to apply to <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="ef6ae2eaae6761130ce38065d0364abd"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRect'>clipRect</a><sup><a href='#SkCanvas_clipRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRect_3'>[3]</a></sup> <a href='#SkCanvas_clipPath'>clipPath</a><sup><a href='#SkCanvas_clipPath_2'>[2]</a></sup><sup><a href='#SkCanvas_clipPath_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipRRect_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipRRect'>clipRRect</a>(const <a href='SkRRect_Reference#SkRRect'>SkRRect</a>& rrect, bool doAntiAlias = false)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipRRect_3_rrect'>rrect</a>,
|
|
with an <a href='undocumented#Alias'>Aliased</a> or <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> clip edge.
|
|
<a href='#SkCanvas_clipRRect_3_rrect'>rrect</a> is transformed by <a href='#Matrix'>Matrix</a> before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipRRect_3_rrect'><code><strong>rrect</strong></code></a></td>
|
|
<td><a href='SkRRect_Reference#RRect'>Round Rect</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRRect_3_doAntiAlias'><code><strong>doAntiAlias</strong></code></a></td>
|
|
<td>true if <a href='#Clip'>Clip</a> is to be <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="f583114580b2176fe3e75b0994476a84"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRect'>clipRect</a><sup><a href='#SkCanvas_clipRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRect_3'>[3]</a></sup> <a href='#SkCanvas_clipPath'>clipPath</a><sup><a href='#SkCanvas_clipPath_2'>[2]</a></sup><sup><a href='#SkCanvas_clipPath_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipPath'></a>
|
|
## clipPath
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipPath'>clipPath</a>(const <a href='SkPath_Reference#SkPath'>SkPath</a>& path, <a href='undocumented#SkClipOp'>SkClipOp</a> op, bool doAntiAlias)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection or difference of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipPath_path'>path</a>,
|
|
with an <a href='undocumented#Alias'>Aliased</a> or <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a> clip edge. <a href='SkPath_Reference#Fill_Type'>Path Fill Type</a> determines if <a href='#SkCanvas_clipPath_path'>path</a>
|
|
describes the area inside or outside its contours; and if <a href='SkPath_Reference#Contour'>Path Contour</a> overlaps
|
|
itself or another <a href='SkPath_Reference#Contour'>Path Contour</a>, whether the overlaps form part of the area.
|
|
<a href='#SkCanvas_clipPath_path'>path</a> is transformed by <a href='#Matrix'>Matrix</a> before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipPath_path'><code><strong>path</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Path'>Path</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipPath_op'><code><strong>op</strong></code></a></td>
|
|
<td><a href='undocumented#Clip_Op'>Clip Op</a> to apply to <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipPath_doAntiAlias'><code><strong>doAntiAlias</strong></code></a></td>
|
|
<td>true if <a href='#Clip'>Clip</a> is to be <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="ee47ae6b813bfaa55e1a7b7c053ed60d"><div>Top figure uses <a href='SkPath_Reference#SkPath_kInverseWinding_FillType'>SkPath::kInverseWinding FillType</a> and <a href='undocumented#SkClipOp_kDifference'>SkClipOp::kDifference</a>;
|
|
area outside clip is subtracted from circle.
|
|
|
|
Bottom figure uses <a href='SkPath_Reference#SkPath_kWinding_FillType'>SkPath::kWinding FillType</a> and <a href='undocumented#SkClipOp_kIntersect'>SkClipOp::kIntersect</a>;
|
|
area inside clip is intersected with circle.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRect'>clipRect</a><sup><a href='#SkCanvas_clipRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRect_3'>[3]</a></sup> <a href='#SkCanvas_clipRRect'>clipRRect</a><sup><a href='#SkCanvas_clipRRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRRect_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipPath_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipPath'>clipPath</a>(const <a href='SkPath_Reference#SkPath'>SkPath</a>& path, <a href='undocumented#SkClipOp'>SkClipOp</a> op)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection or difference of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipPath_2_path'>path</a>.
|
|
Resulting <a href='#Clip'>Clip</a> is <a href='undocumented#Alias'>Aliased</a>; pixels are fully contained by the clip.
|
|
<a href='SkPath_Reference#Fill_Type'>Path Fill Type</a> determines if <a href='#SkCanvas_clipPath_2_path'>path</a>
|
|
describes the area inside or outside its contours; and if <a href='SkPath_Reference#Contour'>Path Contour</a> overlaps
|
|
itself or another <a href='SkPath_Reference#Contour'>Path Contour</a>, whether the overlaps form part of the area.
|
|
<a href='#SkCanvas_clipPath_2_path'>path</a> is transformed by <a href='#Matrix'>Matrix</a>
|
|
before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipPath_2_path'><code><strong>path</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Path'>Path</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipPath_2_op'><code><strong>op</strong></code></a></td>
|
|
<td><a href='undocumented#Clip_Op'>Clip Op</a> to apply to <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7856755c1bf8431c286c734b353345ad"><div>Overlapping <a href='SkRect_Reference#Rect'>Rects</a> form a clip. When clip <a href='SkPath_Reference#Fill_Type'>Path Fill Type</a> is set to
|
|
<a href='SkPath_Reference#SkPath_kWinding_FillType'>SkPath::kWinding FillType</a>, the overlap is included. Set to
|
|
<a href='SkPath_Reference#SkPath_kEvenOdd_FillType'>SkPath::kEvenOdd FillType</a>, the overlap is excluded and forms a hole.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRect'>clipRect</a><sup><a href='#SkCanvas_clipRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRect_3'>[3]</a></sup> <a href='#SkCanvas_clipRRect'>clipRRect</a><sup><a href='#SkCanvas_clipRRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRRect_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipPath_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipPath'>clipPath</a>(const <a href='SkPath_Reference#SkPath'>SkPath</a>& path, bool doAntiAlias = false)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection of <a href='#Clip'>Clip</a> and <a href='#SkCanvas_clipPath_3_path'>path</a>.
|
|
Resulting <a href='#Clip'>Clip</a> is <a href='undocumented#Alias'>Aliased</a>; pixels are fully contained by the clip.
|
|
<a href='SkPath_Reference#Fill_Type'>Path Fill Type</a> determines if <a href='#SkCanvas_clipPath_3_path'>path</a>
|
|
describes the area inside or outside its contours; and if <a href='SkPath_Reference#Contour'>Path Contour</a> overlaps
|
|
itself or another <a href='SkPath_Reference#Contour'>Path Contour</a>, whether the overlaps form part of the area.
|
|
<a href='#SkCanvas_clipPath_3_path'>path</a> is transformed by <a href='#Matrix'>Matrix</a> before it is combined with <a href='#Clip'>Clip</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipPath_3_path'><code><strong>path</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Path'>Path</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipPath_3_doAntiAlias'><code><strong>doAntiAlias</strong></code></a></td>
|
|
<td>true if <a href='#Clip'>Clip</a> is to be <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="187a7ae77a8176e417181411988534b6"><div><a href='#Clip'>Clip</a> loops over itself covering its center twice. When clip <a href='SkPath_Reference#Fill_Type'>Path Fill Type</a>
|
|
is set to <a href='SkPath_Reference#SkPath_kWinding_FillType'>SkPath::kWinding FillType</a>, the overlap is included. Set to
|
|
<a href='SkPath_Reference#SkPath_kEvenOdd_FillType'>SkPath::kEvenOdd FillType</a>, the overlap is excluded and forms a hole.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRect'>clipRect</a><sup><a href='#SkCanvas_clipRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRect_3'>[3]</a></sup> <a href='#SkCanvas_clipRRect'>clipRRect</a><sup><a href='#SkCanvas_clipRRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRRect_3'>[3]</a></sup> <a href='#SkCanvas_clipRegion'>clipRegion</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_setAllowSimplifyClip'></a>
|
|
## setAllowSimplifyClip
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_setAllowSimplifyClip'>setAllowSimplifyClip</a>(bool allow)
|
|
</pre>
|
|
|
|
Experimental.
|
|
|
|
testingSet to simplify clip stack using <a href='undocumented#PathOps'>PathOps</a>.
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clipRegion'></a>
|
|
## clipRegion
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clipRegion'>clipRegion</a>(const <a href='undocumented#SkRegion'>SkRegion</a>& deviceRgn, <a href='undocumented#SkClipOp'>SkClipOp</a> op = <a href='undocumented#SkClipOp_kIntersect'>SkClipOp::kIntersect</a>)
|
|
</pre>
|
|
|
|
Replace <a href='#Clip'>Clip</a> with the intersection or difference of <a href='#Clip'>Clip</a> and <a href='undocumented#Region'>Region</a> <a href='#SkCanvas_clipRegion_deviceRgn'>deviceRgn</a>.
|
|
Resulting <a href='#Clip'>Clip</a> is <a href='undocumented#Alias'>Aliased</a>; pixels are fully contained by the clip.
|
|
<a href='#SkCanvas_clipRegion_deviceRgn'>deviceRgn</a> is unaffected by <a href='#Matrix'>Matrix</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clipRegion_deviceRgn'><code><strong>deviceRgn</strong></code></a></td>
|
|
<td><a href='undocumented#Region'>Region</a> to combine with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_clipRegion_op'><code><strong>op</strong></code></a></td>
|
|
<td><a href='undocumented#Clip_Op'>Clip Op</a> to apply to <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7bb57c0e456c5fda2c2cca4abb68b19e"><div>region is unaffected by canvas rotation; iRect is affected by canvas rotation.
|
|
Both clips are <a href='undocumented#Alias'>Aliased</a>; this is not noticeable on <a href='undocumented#Region'>Region</a> clip because it
|
|
aligns to pixel boundaries.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clipRect'>clipRect</a><sup><a href='#SkCanvas_clipRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRect_3'>[3]</a></sup> <a href='#SkCanvas_clipRRect'>clipRRect</a><sup><a href='#SkCanvas_clipRRect_2'>[2]</a></sup><sup><a href='#SkCanvas_clipRRect_3'>[3]</a></sup> <a href='#SkCanvas_clipPath'>clipPath</a><sup><a href='#SkCanvas_clipPath_2'>[2]</a></sup><sup><a href='#SkCanvas_clipPath_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_quickReject'></a>
|
|
## quickReject
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_quickReject'>quickReject</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect) const
|
|
</pre>
|
|
|
|
Return true if <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_quickReject_rect'>rect</a>, transformed by <a href='#Matrix'>Matrix</a>, can be quickly determined to be
|
|
outside of <a href='#Clip'>Clip</a>. May return false even though <a href='#SkCanvas_quickReject_rect'>rect</a> is outside of <a href='#Clip'>Clip</a>.
|
|
|
|
Use to check if an area to be drawn is clipped out, to skip subsequent draw calls.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_quickReject_rect'><code><strong>rect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> to compare with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#SkCanvas_quickReject_rect'>rect</a>, transformed by <a href='#Matrix'>Matrix</a>, does not intersect <a href='#Clip'>Clip</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="cfe4016241074477809dd45435be9cf4">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
quickReject true
|
|
quickReject false
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a><sup><a href='#SkCanvas_getLocalClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getTotalMatrix'>getTotalMatrix</a> <a href='SkBitmap_Reference#SkBitmap_drawsNothing'>SkBitmap::drawsNothing</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_quickReject_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_quickReject'>quickReject</a>(const <a href='SkPath_Reference#SkPath'>SkPath</a>& path) const
|
|
</pre>
|
|
|
|
Return true if <a href='#SkCanvas_quickReject_2_path'>path</a>, transformed by <a href='#Matrix'>Matrix</a>, can be quickly determined to be
|
|
outside of <a href='#Clip'>Clip</a>. May return false even though <a href='#SkCanvas_quickReject_2_path'>path</a> is outside of <a href='#Clip'>Clip</a>.
|
|
|
|
Use to check if an area to be drawn is clipped out, to skip subsequent draw calls.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_quickReject_2_path'><code><strong>path</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Path'>Path</a> to compare with <a href='#Clip'>Clip</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#SkCanvas_quickReject_2_path'>path</a>, transformed by <a href='#Matrix'>Matrix</a>, does not intersect <a href='#Clip'>Clip</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="56dcd14f943aea6f7d7aafe0de7e6c25">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
quickReject true
|
|
quickReject false
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a><sup><a href='#SkCanvas_getLocalClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getTotalMatrix'>getTotalMatrix</a> <a href='SkBitmap_Reference#SkBitmap_drawsNothing'>SkBitmap::drawsNothing</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getLocalClipBounds'></a>
|
|
## getLocalClipBounds
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkRect_Reference#SkRect'>SkRect</a> <a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a>() const
|
|
</pre>
|
|
|
|
Return bounds of <a href='#Clip'>Clip</a>, transformed by inverse of <a href='#Matrix'>Matrix</a>. If <a href='#Clip'>Clip</a> is empty,
|
|
return <a href='SkRect_Reference#SkRect_MakeEmpty'>SkRect::MakeEmpty</a>, where all <a href='SkRect_Reference#Rect'>Rect</a> sides equal zero.
|
|
|
|
<a href='SkRect_Reference#Rect'>Rect</a> returned is outset by one to account for partial pixel coverage if <a href='#Clip'>Clip</a>
|
|
is <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a>.
|
|
|
|
### Return Value
|
|
|
|
bounds of <a href='#Clip'>Clip</a> in local coordinates
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7f60cb030d3f9b2473adbe3e34b19d91"><div>Initial bounds is device bounds outset by 1 on all sides.
|
|
Clipped bounds is <a href='#SkCanvas_clipPath'>clipPath</a> bounds outset by 1 on all sides.
|
|
Scaling the canvas by two on both axes scales the local bounds by 1/2
|
|
on both axes.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
left:-1 top:-1 right:257 bottom:257
|
|
left:29 top:129 right:121 bottom:231
|
|
left:14.5 top:64.5 right:60.5 bottom:115.5
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a><sup><a href='#SkCanvas_getDeviceClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getBaseLayerSize'>getBaseLayerSize</a> <a href='#SkCanvas_quickReject'>quickReject</a><sup><a href='#SkCanvas_quickReject_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getLocalClipBounds_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a>(<a href='SkRect_Reference#SkRect'>SkRect</a>* bounds) const
|
|
</pre>
|
|
|
|
Return <a href='#SkCanvas_getLocalClipBounds_2_bounds'>bounds</a> of <a href='#Clip'>Clip</a>, transformed by inverse of <a href='#Matrix'>Matrix</a>. If <a href='#Clip'>Clip</a> is empty,
|
|
return false, and set <a href='#SkCanvas_getLocalClipBounds_2_bounds'>bounds</a> to <a href='SkRect_Reference#SkRect_MakeEmpty'>SkRect::MakeEmpty</a>, where all <a href='SkRect_Reference#Rect'>Rect</a> sides equal zero.
|
|
|
|
<a href='#SkCanvas_getLocalClipBounds_2_bounds'>bounds</a> is outset by one to account for partial pixel coverage if <a href='#Clip'>Clip</a>
|
|
is <a href='SkPaint_Reference#Anti_Alias'>Anti Aliased</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_getLocalClipBounds_2_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> of <a href='#Clip'>Clip</a> in local coordinates</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#Clip'>Clip</a> <a href='#SkCanvas_getLocalClipBounds_2_bounds'>bounds</a> is not empty
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="85496614e90c66b020f8a70db8d06f4a">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
local bounds empty = false
|
|
local bounds empty = true
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a><sup><a href='#SkCanvas_getDeviceClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getBaseLayerSize'>getBaseLayerSize</a> <a href='#SkCanvas_quickReject'>quickReject</a><sup><a href='#SkCanvas_quickReject_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getDeviceClipBounds'></a>
|
|
## getDeviceClipBounds
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkIRect_Reference#SkIRect'>SkIRect</a> <a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a>() const
|
|
</pre>
|
|
|
|
Return <a href='SkIRect_Reference#IRect'>IRect</a> bounds of <a href='#Clip'>Clip</a>, unaffected by <a href='#Matrix'>Matrix</a>. If <a href='#Clip'>Clip</a> is empty,
|
|
return <a href='SkRect_Reference#SkRect_MakeEmpty'>SkRect::MakeEmpty</a>, where all <a href='SkRect_Reference#Rect'>Rect</a> sides equal zero.
|
|
|
|
Unlike <a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a>, returned <a href='SkIRect_Reference#IRect'>IRect</a> is not outset.
|
|
|
|
### Return Value
|
|
|
|
bounds of <a href='#Clip'>Clip</a> in <a href='undocumented#Device'>Device</a> coordinates
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="556832ac5711af662a98c21c547185e9"><div>Initial bounds is device bounds, not outset.
|
|
Clipped bounds is <a href='#SkCanvas_clipPath'>clipPath</a> bounds, not outset.
|
|
Scaling the canvas by 1/2 on both axes scales the device bounds by 1/2
|
|
on both axes.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
left:0 top:0 right:256 bottom:256
|
|
left:30 top:130 right:120 bottom:230
|
|
left:15 top:65 right:60 bottom:115
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a><sup><a href='#SkCanvas_getLocalClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getBaseLayerSize'>getBaseLayerSize</a> <a href='#SkCanvas_quickReject'>quickReject</a><sup><a href='#SkCanvas_quickReject_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getDeviceClipBounds_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a>(<a href='SkIRect_Reference#SkIRect'>SkIRect</a>* bounds) const
|
|
</pre>
|
|
|
|
Return <a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_getDeviceClipBounds_2_bounds'>bounds</a> of <a href='#Clip'>Clip</a>, unaffected by <a href='#Matrix'>Matrix</a>. If <a href='#Clip'>Clip</a> is empty,
|
|
return false, and set <a href='#SkCanvas_getDeviceClipBounds_2_bounds'>bounds</a> to <a href='SkRect_Reference#SkRect_MakeEmpty'>SkRect::MakeEmpty</a>, where all <a href='SkRect_Reference#Rect'>Rect</a> sides equal zero.
|
|
|
|
Unlike <a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a>, <a href='#SkCanvas_getDeviceClipBounds_2_bounds'>bounds</a> is not outset.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_getDeviceClipBounds_2_bounds'><code><strong>bounds</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> of <a href='#Clip'>Clip</a> in device coordinates</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#Clip'>Clip</a> <a href='#SkCanvas_getDeviceClipBounds_2_bounds'>bounds</a> is not empty
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="6abb99f849a1f0e33e1dedc00d1c4f7a">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
device bounds empty = false
|
|
device bounds empty = true
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a><sup><a href='#SkCanvas_getLocalClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getBaseLayerSize'>getBaseLayerSize</a> <a href='#SkCanvas_quickReject'>quickReject</a><sup><a href='#SkCanvas_quickReject_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
## <a name='Draw'>Draw</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_clear'>clear</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>fills <a href='#Clip'>Clip</a> with <a href='SkColor_Reference#Color'>Color</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAnnotation'>drawAnnotation</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>associates a <a href='SkRect_Reference#Rect'>Rect</a> with a key-value pair</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAnnotation'>drawAnnotation(const SkRect& rect, const char key[], SkData* value)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAnnotation_2'>drawAnnotation(const SkRect& rect, const char key[], const sk sp<SkData>& value)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawArc'>drawArc</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Arc'>Arc</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAtlas'>drawAtlas</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws sprites using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAtlas'>drawAtlas(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[], const SkColor colors[], int count, SkBlendMode mode, const SkRect* cullRect, const SkPaint* paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAtlas_2'>drawAtlas(const sk sp<SkImage>& atlas, const SkRSXform xform[], const SkRect tex[], const SkColor colors[], int count, SkBlendMode mode, const SkRect* cullRect, const SkPaint* paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAtlas_3'>drawAtlas(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[], int count, const SkRect* cullRect, const SkPaint* paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawAtlas_4'>drawAtlas(const sk sp<SkImage>& atlas, const SkRSXform xform[], const SkRect tex[], int count, const SkRect* cullRect, const SkPaint* paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawCircle'>drawCircle</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Circle'>Circle</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawCircle'>drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawCircle_2'>drawCircle(SkPoint center, SkScalar radius, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawColor'>drawColor</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>fills <a href='#Clip'>Clip</a> with <a href='SkColor_Reference#Color'>Color</a> and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawDRRect'>drawDRRect</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws double <a href='SkRRect_Reference#RRect'>Round Rect</a> stroked or filled</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawDrawable'>drawDrawable</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Drawable'>Drawable</a>, encapsulated drawing commands</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawDrawable'>drawDrawable(SkDrawable* drawable, const SkMatrix* matrix = nullptr)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawDrawable_2'>drawDrawable(SkDrawable* drawable, SkScalar x, SkScalar y)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawIRect'>drawIRect</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkIRect_Reference#IRect'>IRect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawLine'>drawLine</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws line segment between two points</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawLine'>drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawLine_2'>drawLine(SkPoint p0, SkPoint p1, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawOval'>drawOval</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Oval'>Oval</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPaint'>drawPaint</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>fills <a href='#Clip'>Clip</a> with <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPatch'>drawPatch</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Coons_Patch'>Coons Patch</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPatch'>drawPatch(const SkPoint cubics[12], const SkColor colors[4], const SkPoint texCoords[4], SkBlendMode mode, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPatch_2'>drawPatch(const SkPoint cubics[12], const SkColor colors[4], const SkPoint texCoords[4], const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPath'>drawPath</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkPath_Reference#Path'>Path</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPicture'>drawPicture</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkPicture_Reference#Picture'>Picture</a> using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPicture'>drawPicture(const SkPicture* picture)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPicture_2'>drawPicture(const sk sp<SkPicture>& picture)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPicture_3'>drawPicture(const SkPicture* picture, const SkMatrix* matrix, const SkPaint* paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPicture_4'>drawPicture(const sk sp<SkPicture>& picture, const SkMatrix* matrix, const SkPaint* paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPoint'>drawPoint</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws point at (x, y) position</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPoint'>drawPoint(SkScalar x, SkScalar y, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPoint_2'>drawPoint(SkPoint p, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPoints'>drawPoints</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws array as points, lines, polygon</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRRect'>drawRRect</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkRRect_Reference#RRect'>Round Rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRect'>drawRect</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkRect_Reference#Rect'>Rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRegion'>drawRegion</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Region'>Region</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawRoundRect'>drawRoundRect</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='SkRRect_Reference#RRect'>Round Rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawVertices'>drawVertices</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws <a href='undocumented#Vertices'>Vertices</a>, a triangle mesh</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawVertices'>drawVertices(const SkVertices* vertices, SkBlendMode mode, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawVertices_2'>drawVertices(const sk sp<SkVertices>& vertices, SkBlendMode mode, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawVertices_3'>drawVertices(const SkVertices* vertices, const SkMatrix* bones, int boneCount, SkBlendMode mode, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawVertices_4'>drawVertices(const sk sp<SkVertices>& vertices, const SkMatrix* bones, int boneCount, SkBlendMode mode, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_drawColor'></a>
|
|
## drawColor
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawColor'>drawColor</a>(<a href='SkColor_Reference#SkColor'>SkColor</a> color, <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode = <a href='SkBlendMode_Reference#SkBlendMode_kSrcOver'>SkBlendMode::kSrcOver</a>)
|
|
</pre>
|
|
|
|
Fill <a href='#Clip'>Clip</a> with <a href='SkColor_Reference#Color'>Color</a> <a href='#SkCanvas_drawColor_color'>color</a>.
|
|
<a href='#SkCanvas_drawColor_mode'>mode</a> determines how ARGB is combined with destination.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawColor_color'><code><strong>color</strong></code></a></td>
|
|
<td><a href='undocumented#Unpremultiply'>Unpremultiplied</a> ARGB</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawColor_mode'><code><strong>mode</strong></code></a></td>
|
|
<td><a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> used to combine source <a href='#SkCanvas_drawColor_color'>color</a> and destination</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9cf94fead1e6b17d836c704b4eac269a"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clear'>clear</a> <a href='SkBitmap_Reference#SkBitmap_erase'>SkBitmap::erase</a> <a href='#SkCanvas_drawPaint'>drawPaint</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_clear'></a>
|
|
## clear
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_clear'>clear</a>(<a href='SkColor_Reference#SkColor'>SkColor</a> color)
|
|
</pre>
|
|
|
|
Fill <a href='#Clip'>Clip</a> with <a href='SkColor_Reference#Color'>Color</a> <a href='#SkCanvas_clear_color'>color</a> using <a href='SkBlendMode_Reference#SkBlendMode_kSrc'>SkBlendMode::kSrc</a>.
|
|
This has the effect of replacing all pixels contained by <a href='#Clip'>Clip</a> with <a href='#SkCanvas_clear_color'>color</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_clear_color'><code><strong>color</strong></code></a></td>
|
|
<td><a href='undocumented#Unpremultiply'>Unpremultiplied</a> ARGB</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8c4499e322f10153dcd9b0b9806233b9"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawColor'>drawColor</a> <a href='SkBitmap_Reference#SkBitmap_erase'>SkBitmap::erase</a> <a href='#SkCanvas_drawPaint'>drawPaint</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_discard'></a>
|
|
## discard
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_discard'>discard</a>()
|
|
</pre>
|
|
|
|
Make <a href='#Canvas'>Canvas</a> contents undefined. Subsequent calls that read <a href='#Canvas'>Canvas</a> pixels,
|
|
such as drawing with <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a>, return undefined results. <a href='#SkCanvas_discard'>discard</a> does
|
|
not change <a href='#Clip'>Clip</a> or <a href='#Matrix'>Matrix</a>.
|
|
|
|
<a href='#SkCanvas_discard'>discard</a> may do nothing, depending on the implementation of <a href='SkSurface_Reference#Surface'>Surface</a> or <a href='undocumented#Device'>Device</a>
|
|
that created <a href='#Canvas'>Canvas</a>.
|
|
|
|
<a href='#SkCanvas_discard'>discard</a> allows optimized performance on subsequent draws by removing
|
|
cached data associated with <a href='SkSurface_Reference#Surface'>Surface</a> or <a href='undocumented#Device'>Device</a>.
|
|
It is not necessary to call <a href='#SkCanvas_discard'>discard</a> once done with <a href='#Canvas'>Canvas</a>;
|
|
any cached data is deleted when owning <a href='SkSurface_Reference#Surface'>Surface</a> or <a href='undocumented#Device'>Device</a> is deleted.
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_flush'>flush</a> <a href='SkSurface_Reference#SkSurface_prepareForExternalIO'>SkSurface::prepareForExternalIO</a> GrContext::abandonContext
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPaint'></a>
|
|
## drawPaint
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPaint'>drawPaint</a>(const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
Fill <a href='#Clip'>Clip</a> with <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPaint_paint'>paint</a>. <a href='SkPaint_Reference#Paint'>Paint</a> components <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> affect drawing;
|
|
<a href='undocumented#Path_Effect'>Path Effect</a> in <a href='#SkCanvas_drawPaint_paint'>paint</a> is ignored.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPaint_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>graphics state used to fill <a href='#Canvas'>Canvas</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1cd076b9b1a7c976cdca72b93c4f42dd"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_clear'>clear</a> <a href='#SkCanvas_drawColor'>drawColor</a> <a href='SkBitmap_Reference#SkBitmap_erase'>SkBitmap::erase</a>
|
|
|
|
---
|
|
|
|
## <a name='SkCanvas_PointMode'>Enum SkCanvas::PointMode</a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
enum <a href='#SkCanvas_PointMode'>PointMode</a> {
|
|
<a href='#SkCanvas_kPoints_PointMode'>kPoints PointMode</a>,
|
|
<a href='#SkCanvas_kLines_PointMode'>kLines PointMode</a>,
|
|
<a href='#SkCanvas_kPolygon_PointMode'>kPolygon PointMode</a>,
|
|
};
|
|
</pre>
|
|
|
|
Selects if an array of points are drawn as discrete points, as lines, or as
|
|
an open polygon.
|
|
|
|
### Constants
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
|
|
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kPoints_PointMode'><code>SkCanvas::kPoints_PointMode</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
draw each point separately</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kLines_PointMode'><code>SkCanvas::kLines_PointMode</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
draw each pair of points as a line segment</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kPolygon_PointMode'><code>SkCanvas::kPolygon_PointMode</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
draw the array of points as a open polygon</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="292b4b2008961b6f612434d3121fc4ce"><div>The upper left corner shows three squares when drawn as points.
|
|
The upper right corner shows one line; when drawn as lines, two points are required per line.
|
|
The lower right corner shows two lines; when draw as polygon, no miter is drawn at the corner.
|
|
The lower left corner shows two lines with a miter when path contains polygon.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup> <a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
<a name='SkCanvas_drawPoints'></a>
|
|
## drawPoints
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPoints'>drawPoints</a>(<a href='#SkCanvas_PointMode'>PointMode</a> mode, size_t count, const <a href='SkPoint_Reference#SkPoint'>SkPoint</a> pts[], const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='#SkCanvas_drawPoints_pts'>pts</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPoints_paint'>paint</a>.
|
|
<a href='#SkCanvas_drawPoints_count'>count</a> is the number of points; if <a href='#SkCanvas_drawPoints_count'>count</a> is less than one, has no effect.
|
|
<a href='#SkCanvas_drawPoints_mode'>mode</a> may be one of: <a href='#SkCanvas_kPoints_PointMode'>kPoints PointMode</a>, <a href='#SkCanvas_kLines_PointMode'>kLines PointMode</a>, or <a href='#SkCanvas_kPolygon_PointMode'>kPolygon PointMode</a>.
|
|
|
|
If <a href='#SkCanvas_drawPoints_mode'>mode</a> is <a href='#SkCanvas_kPoints_PointMode'>kPoints PointMode</a>, the shape of point drawn depends on <a href='#SkCanvas_drawPoints_paint'>paint</a>
|
|
<a href='SkPaint_Reference#Stroke_Cap'>Paint Stroke Cap</a>. If <a href='#SkCanvas_drawPoints_paint'>paint</a> is set to <a href='SkPaint_Reference#SkPaint_kRound_Cap'>SkPaint::kRound Cap</a>, each point draws a
|
|
circle of diameter <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a>. If <a href='#SkCanvas_drawPoints_paint'>paint</a> is set to <a href='SkPaint_Reference#SkPaint_kSquare_Cap'>SkPaint::kSquare Cap</a>
|
|
or <a href='SkPaint_Reference#SkPaint_kButt_Cap'>SkPaint::kButt Cap</a>, each point draws a square of width and height
|
|
<a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a>.
|
|
|
|
If <a href='#SkCanvas_drawPoints_mode'>mode</a> is <a href='#SkCanvas_kLines_PointMode'>kLines PointMode</a>, each pair of points draws a line segment.
|
|
One line is drawn for every two points; each point is used once. If <a href='#SkCanvas_drawPoints_count'>count</a> is odd,
|
|
the final point is ignored.
|
|
|
|
If <a href='#SkCanvas_drawPoints_mode'>mode</a> is <a href='#SkCanvas_kPolygon_PointMode'>kPolygon PointMode</a>, each adjacent pair of points draws a line segment.
|
|
<a href='#SkCanvas_drawPoints_count'>count</a> minus one lines are drawn; the first and last point are used once.
|
|
|
|
Each line segment respects <a href='#SkCanvas_drawPoints_paint'>paint</a> <a href='SkPaint_Reference#Stroke_Cap'>Paint Stroke Cap</a> and <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a>.
|
|
<a href='SkPaint_Reference#Style'>Paint Style</a> is ignored, as if were set to <a href='SkPaint_Reference#SkPaint_kStroke_Style'>SkPaint::kStroke Style</a>.
|
|
|
|
Always draws each element one at a time; is not affected by
|
|
<a href='SkPaint_Reference#Stroke_Join'>Paint Stroke Join</a>, and unlike <a href='#SkCanvas_drawPath'>drawPath</a>, does not create a mask from all points
|
|
and lines before drawing.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPoints_mode'><code><strong>mode</strong></code></a></td>
|
|
<td>whether <a href='#SkCanvas_drawPoints_pts'>pts</a> draws points or lines</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPoints_count'><code><strong>count</strong></code></a></td>
|
|
<td>number of points in the array</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPoints_pts'><code><strong>pts</strong></code></a></td>
|
|
<td>array of points to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPoints_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="635d54b4716e226e93dfbc21ad40e77d"><div>
|
|
|
|
<table> <tr>
|
|
<td>The first column draws points.</td>
|
|
</tr> <tr>
|
|
<td>The second column draws points as lines.</td>
|
|
</tr> <tr>
|
|
<td>The third column draws points as a polygon.</td>
|
|
</tr> <tr>
|
|
<td>The fourth column draws points as a polygonal path.</td>
|
|
</tr> <tr>
|
|
<td>The first row uses a round cap and round join.</td>
|
|
</tr> <tr>
|
|
<td>The second row uses a square cap and a miter join.</td>
|
|
</tr> <tr>
|
|
<td>The third row uses a butt cap and a bevel join.</td>
|
|
</tr>
|
|
</table>
|
|
|
|
The transparent color makes multiple line draws visible;
|
|
the path is drawn all at once.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup> <a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPoint'></a>
|
|
## drawPoint
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPoint'>drawPoint</a>(<a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> point at (<a href='#SkCanvas_drawPoint_x'>x</a>, <a href='#SkCanvas_drawPoint_y'>y</a>) using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPoint_paint'>paint</a>.
|
|
|
|
The shape of point drawn depends on <a href='#SkCanvas_drawPoint_paint'>paint</a> <a href='SkPaint_Reference#Stroke_Cap'>Paint Stroke Cap</a>.
|
|
If <a href='#SkCanvas_drawPoint_paint'>paint</a> is set to <a href='SkPaint_Reference#SkPaint_kRound_Cap'>SkPaint::kRound Cap</a>, draw a circle of diameter
|
|
<a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a>. If <a href='#SkCanvas_drawPoint_paint'>paint</a> is set to <a href='SkPaint_Reference#SkPaint_kSquare_Cap'>SkPaint::kSquare Cap</a> or <a href='SkPaint_Reference#SkPaint_kButt_Cap'>SkPaint::kButt Cap</a>,
|
|
draw a square of width and height <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a>.
|
|
<a href='SkPaint_Reference#Style'>Paint Style</a> is ignored, as if were set to <a href='SkPaint_Reference#SkPaint_kStroke_Style'>SkPaint::kStroke Style</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPoint_x'><code><strong>x</strong></code></a></td>
|
|
<td>left edge of circle or square</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPoint_y'><code><strong>y</strong></code></a></td>
|
|
<td>top edge of circle or square</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPoint_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="3476b553e7b547b604a3f6969f02d933"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPoints'>drawPoints</a> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPoint_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPoint'>drawPoint</a>(<a href='SkPoint_Reference#SkPoint'>SkPoint</a> p, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> point <a href='#SkCanvas_drawPoint_2_p'>p</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPoint_2_paint'>paint</a>.
|
|
|
|
The shape of point drawn depends on <a href='#SkCanvas_drawPoint_2_paint'>paint</a> <a href='SkPaint_Reference#Stroke_Cap'>Paint Stroke Cap</a>.
|
|
If <a href='#SkCanvas_drawPoint_2_paint'>paint</a> is set to <a href='SkPaint_Reference#SkPaint_kRound_Cap'>SkPaint::kRound Cap</a>, draw a circle of diameter
|
|
<a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a>. If <a href='#SkCanvas_drawPoint_2_paint'>paint</a> is set to <a href='SkPaint_Reference#SkPaint_kSquare_Cap'>SkPaint::kSquare Cap</a> or <a href='SkPaint_Reference#SkPaint_kButt_Cap'>SkPaint::kButt Cap</a>,
|
|
draw a square of width and height <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a>.
|
|
<a href='SkPaint_Reference#Style'>Paint Style</a> is ignored, as if were set to <a href='SkPaint_Reference#SkPaint_kStroke_Style'>SkPaint::kStroke Style</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPoint_2_p'><code><strong>p</strong></code></a></td>
|
|
<td>top-left edge of circle or square</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPoint_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1a0a839061c69d870acca2bcfbdf1a41"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPoints'>drawPoints</a> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawLine'></a>
|
|
## drawLine
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawLine'>drawLine</a>(<a href='undocumented#SkScalar'>SkScalar</a> x0, <a href='undocumented#SkScalar'>SkScalar</a> y0, <a href='undocumented#SkScalar'>SkScalar</a> x1, <a href='undocumented#SkScalar'>SkScalar</a> y1, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
Draws line segment from (<a href='#SkCanvas_drawLine_x0'>x0</a>, <a href='#SkCanvas_drawLine_y0'>y0</a>) to (<a href='#SkCanvas_drawLine_x1'>x1</a>, <a href='#SkCanvas_drawLine_y1'>y1</a>) using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawLine_paint'>paint</a>.
|
|
In <a href='#SkCanvas_drawLine_paint'>paint</a>: <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness;
|
|
<a href='SkPaint_Reference#Stroke_Cap'>Paint Stroke Cap</a> draws the end rounded or square;
|
|
<a href='SkPaint_Reference#Style'>Paint Style</a> is ignored, as if were set to <a href='SkPaint_Reference#SkPaint_kStroke_Style'>SkPaint::kStroke Style</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawLine_x0'><code><strong>x0</strong></code></a></td>
|
|
<td>start of line segment on x-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawLine_y0'><code><strong>y0</strong></code></a></td>
|
|
<td>start of line segment on y-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawLine_x1'><code><strong>x1</strong></code></a></td>
|
|
<td>end of line segment on x-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawLine_y1'><code><strong>y1</strong></code></a></td>
|
|
<td>end of line segment on y-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawLine_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="d10ee4a265f278d02afe11ad889b293b"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawLine_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawLine'>drawLine</a>(<a href='SkPoint_Reference#SkPoint'>SkPoint</a> p0, <a href='SkPoint_Reference#SkPoint'>SkPoint</a> p1, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
Draws line segment from <a href='#SkCanvas_drawLine_2_p0'>p0</a> to <a href='#SkCanvas_drawLine_2_p1'>p1</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawLine_2_paint'>paint</a>.
|
|
In <a href='#SkCanvas_drawLine_2_paint'>paint</a>: <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness;
|
|
<a href='SkPaint_Reference#Stroke_Cap'>Paint Stroke Cap</a> draws the end rounded or square;
|
|
<a href='SkPaint_Reference#Style'>Paint Style</a> is ignored, as if were set to <a href='SkPaint_Reference#SkPaint_kStroke_Style'>SkPaint::kStroke Style</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawLine_2_p0'><code><strong>p0</strong></code></a></td>
|
|
<td>start of line segment</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawLine_2_p1'><code><strong>p1</strong></code></a></td>
|
|
<td>end of line segment</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawLine_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="f8525816cb596dde1a3855446792c8e0"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawRect'></a>
|
|
## drawRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawRect'>drawRect</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawRect_rect'>rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawRect_paint'>paint</a>.
|
|
In <a href='#SkCanvas_drawRect_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if rectangle is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness, and
|
|
<a href='SkPaint_Reference#Stroke_Join'>Paint Stroke Join</a> draws the corners rounded or square.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawRect_rect'><code><strong>rect</strong></code></a></td>
|
|
<td>rectangle to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawRect_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="871b0da9b4a23de11ae7a772ce14aed3"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawIRect'>drawIRect</a> <a href='#SkCanvas_drawRRect'>drawRRect</a> <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a> <a href='#SkCanvas_drawRegion'>drawRegion</a> <a href='#SkCanvas_drawPath'>drawPath</a> <a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawIRect'></a>
|
|
## drawIRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawIRect'>drawIRect</a>(const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& rect, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_drawIRect_rect'>rect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawIRect_paint'>paint</a>.
|
|
In <a href='#SkCanvas_drawIRect_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if rectangle is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness, and
|
|
<a href='SkPaint_Reference#Stroke_Join'>Paint Stroke Join</a> draws the corners rounded or square.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawIRect_rect'><code><strong>rect</strong></code></a></td>
|
|
<td>rectangle to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawIRect_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="d3d8ca584134560750b1efa4a4c6e138"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawRRect'>drawRRect</a> <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a> <a href='#SkCanvas_drawRegion'>drawRegion</a> <a href='#SkCanvas_drawPath'>drawPath</a> <a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawRegion'></a>
|
|
## drawRegion
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawRegion'>drawRegion</a>(const <a href='undocumented#SkRegion'>SkRegion</a>& region, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Region'>Region</a> <a href='#SkCanvas_drawRegion_region'>region</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawRegion_paint'>paint</a>.
|
|
In <a href='#SkCanvas_drawRegion_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if rectangle is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness, and
|
|
<a href='SkPaint_Reference#Stroke_Join'>Paint Stroke Join</a> draws the corners rounded or square.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawRegion_region'><code><strong>region</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawRegion_region'>region</a> to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawRegion_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="80309e0deca0f8add616cec7bec634ca"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawIRect'>drawIRect</a> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawOval'></a>
|
|
## drawOval
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawOval'>drawOval</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& oval, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Oval'>Oval</a> <a href='#SkCanvas_drawOval_oval'>oval</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a>.
|
|
In <a href='#SkCanvas_drawOval_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if <a href='undocumented#Oval'>Oval</a> is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawOval_oval'><code><strong>oval</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> bounds of <a href='undocumented#Oval'>Oval</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawOval_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8b6b86f8a022811cd29a9c6ab771df12"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup> <a href='#SkCanvas_drawPath'>drawPath</a> <a href='#SkCanvas_drawRRect'>drawRRect</a> <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawRRect'></a>
|
|
## drawRRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawRRect'>drawRRect</a>(const <a href='SkRRect_Reference#SkRRect'>SkRRect</a>& rrect, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkRRect_Reference#RRect'>Round Rect</a> <a href='#SkCanvas_drawRRect_rrect'>rrect</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawRRect_paint'>paint</a>.
|
|
In <a href='#SkCanvas_drawRRect_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if <a href='#SkCanvas_drawRRect_rrect'>rrect</a> is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness.
|
|
|
|
<a href='#SkCanvas_drawRRect_rrect'>rrect</a> may represent a rectangle, circle, oval, uniformly rounded rectangle, or
|
|
may have any combination of positive non-square radii for the four corners.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawRRect_rrect'><code><strong>rrect</strong></code></a></td>
|
|
<td><a href='SkRRect_Reference#RRect'>Round Rect</a> with up to eight corner radii to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawRRect_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="90fed1bb11efb43aada94113338c63d8"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a> <a href='#SkCanvas_drawDRRect'>drawDRRect</a> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawOval'>drawOval</a> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawDRRect'></a>
|
|
## drawDRRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawDRRect'>drawDRRect</a>(const <a href='SkRRect_Reference#SkRRect'>SkRRect</a>& outer, const <a href='SkRRect_Reference#SkRRect'>SkRRect</a>& inner, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkRRect_Reference#RRect'>Round Rect</a> <a href='#SkCanvas_drawDRRect_outer'>outer</a> and <a href='#SkCanvas_drawDRRect_inner'>inner</a>
|
|
using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawDRRect_paint'>paint</a>.
|
|
<a href='#SkCanvas_drawDRRect_outer'>outer</a> must contain <a href='#SkCanvas_drawDRRect_inner'>inner</a> or the drawing is undefined.
|
|
In <a href='#SkCanvas_drawDRRect_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if <a href='SkRRect_Reference#RRect'>Round Rect</a> is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness.
|
|
If stroked and <a href='SkRRect_Reference#RRect'>Round Rect</a> corner has zero length radii, <a href='SkPaint_Reference#Stroke_Join'>Paint Stroke Join</a> can
|
|
draw corners rounded or square.
|
|
|
|
GPU-backed platforms optimize drawing when both <a href='#SkCanvas_drawDRRect_outer'>outer</a> and <a href='#SkCanvas_drawDRRect_inner'>inner</a> are
|
|
concave and <a href='#SkCanvas_drawDRRect_outer'>outer</a> contains <a href='#SkCanvas_drawDRRect_inner'>inner</a>. These platforms may not be able to draw
|
|
<a href='SkPath_Reference#Path'>Path</a> built with identical data as fast.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawDRRect_outer'><code><strong>outer</strong></code></a></td>
|
|
<td><a href='SkRRect_Reference#RRect'>Round Rect</a> <a href='#SkCanvas_drawDRRect_outer'>outer</a> bounds to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawDRRect_inner'><code><strong>inner</strong></code></a></td>
|
|
<td><a href='SkRRect_Reference#RRect'>Round Rect</a> <a href='#SkCanvas_drawDRRect_inner'>inner</a> bounds to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawDRRect_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="02e33141f13da2f19aef7feb7117b541"></fiddle-embed></div>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="30823cb4edf884d330285ea161664931"><div>Outer <a href='SkRect_Reference#Rect'>Rect</a> has no corner radii, but stroke join is rounded.
|
|
Inner <a href='SkRRect_Reference#RRect'>Round Rect</a> has corner radii; outset stroke increases radii of corners.
|
|
Stroke join does not affect <a href='#SkCanvas_drawDRRect_inner'>inner</a> <a href='SkRRect_Reference#RRect'>Round Rect</a> since it has no sharp corners.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a> <a href='#SkCanvas_drawRRect'>drawRRect</a> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawOval'>drawOval</a> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawCircle'></a>
|
|
## drawCircle
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawCircle'>drawCircle</a>(<a href='undocumented#SkScalar'>SkScalar</a> cx, <a href='undocumented#SkScalar'>SkScalar</a> cy, <a href='undocumented#SkScalar'>SkScalar</a> radius, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Circle'>Circle</a> at (<a href='#SkCanvas_drawCircle_cx'>cx</a>, <a href='#SkCanvas_drawCircle_cy'>cy</a>) with <a href='#SkCanvas_drawCircle_radius'>radius</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawCircle_paint'>paint</a>.
|
|
If <a href='#SkCanvas_drawCircle_radius'>radius</a> is zero or less, nothing is drawn.
|
|
In <a href='#SkCanvas_drawCircle_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if <a href='undocumented#Circle'>Circle</a> is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawCircle_cx'><code><strong>cx</strong></code></a></td>
|
|
<td><a href='undocumented#Circle'>Circle</a> center on the x-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawCircle_cy'><code><strong>cy</strong></code></a></td>
|
|
<td><a href='undocumented#Circle'>Circle</a> center on the y-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawCircle_radius'><code><strong>radius</strong></code></a></td>
|
|
<td>half the diameter of <a href='undocumented#Circle'>Circle</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawCircle_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="841229e25ca9dfb68bd0dc4dfff356eb"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawOval'>drawOval</a> <a href='#SkCanvas_drawRRect'>drawRRect</a> <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a> <a href='#SkCanvas_drawPath'>drawPath</a> <a href='#SkCanvas_drawArc'>drawArc</a> <a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup> <a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawCircle_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawCircle'>drawCircle</a>(<a href='SkPoint_Reference#SkPoint'>SkPoint</a> center, <a href='undocumented#SkScalar'>SkScalar</a> radius, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Circle'>Circle</a> at <a href='#SkCanvas_drawCircle_2_center'>center</a> with <a href='#SkCanvas_drawCircle_2_radius'>radius</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawCircle_2_paint'>paint</a>.
|
|
If <a href='#SkCanvas_drawCircle_2_radius'>radius</a> is zero or less, nothing is drawn.
|
|
In <a href='#SkCanvas_drawCircle_2_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if <a href='undocumented#Circle'>Circle</a> is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawCircle_2_center'><code><strong>center</strong></code></a></td>
|
|
<td><a href='undocumented#Circle'>Circle</a> <a href='#SkCanvas_drawCircle_2_center'>center</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawCircle_2_radius'><code><strong>radius</strong></code></a></td>
|
|
<td>half the diameter of <a href='undocumented#Circle'>Circle</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawCircle_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9303ffae45ddd0b0a1f93d816a1762f4"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawOval'>drawOval</a> <a href='#SkCanvas_drawRRect'>drawRRect</a> <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a> <a href='#SkCanvas_drawPath'>drawPath</a> <a href='#SkCanvas_drawArc'>drawArc</a> <a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup> <a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawArc'></a>
|
|
## drawArc
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawArc'>drawArc</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& oval, <a href='undocumented#SkScalar'>SkScalar</a> startAngle, <a href='undocumented#SkScalar'>SkScalar</a> sweepAngle, bool useCenter,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Arc'>Arc</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawArc_paint'>paint</a>.
|
|
|
|
<a href='undocumented#Arc'>Arc</a> is part of <a href='undocumented#Oval'>Oval</a> bounded by <a href='#SkCanvas_drawArc_oval'>oval</a>, sweeping from <a href='#SkCanvas_drawArc_startAngle'>startAngle</a> to <a href='#SkCanvas_drawArc_startAngle'>startAngle</a> plus
|
|
<a href='#SkCanvas_drawArc_sweepAngle'>sweepAngle</a>. <a href='#SkCanvas_drawArc_startAngle'>startAngle</a> and <a href='#SkCanvas_drawArc_sweepAngle'>sweepAngle</a> are in degrees.
|
|
|
|
<a href='#SkCanvas_drawArc_startAngle'>startAngle</a> of zero places start point at the right middle edge of <a href='#SkCanvas_drawArc_oval'>oval</a>.
|
|
A positive <a href='#SkCanvas_drawArc_sweepAngle'>sweepAngle</a> places <a href='undocumented#Arc'>Arc</a> end point clockwise from start point;
|
|
a negative <a href='#SkCanvas_drawArc_sweepAngle'>sweepAngle</a> places <a href='undocumented#Arc'>Arc</a> end point counterclockwise from start point.
|
|
<a href='#SkCanvas_drawArc_sweepAngle'>sweepAngle</a> may exceed 360 degrees, a full circle.
|
|
If <a href='#SkCanvas_drawArc_useCenter'>useCenter</a> is true, draw a wedge that includes lines from <a href='#SkCanvas_drawArc_oval'>oval</a>
|
|
center to <a href='undocumented#Arc'>Arc</a> end points. If <a href='#SkCanvas_drawArc_useCenter'>useCenter</a> is false, draw <a href='undocumented#Arc'>Arc</a> between end points.
|
|
|
|
If <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawArc_oval'>oval</a> is empty or <a href='#SkCanvas_drawArc_sweepAngle'>sweepAngle</a> is zero, nothing is drawn.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawArc_oval'><code><strong>oval</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> bounds of <a href='undocumented#Oval'>Oval</a> containing <a href='undocumented#Arc'>Arc</a> to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawArc_startAngle'><code><strong>startAngle</strong></code></a></td>
|
|
<td>angle in degrees where <a href='undocumented#Arc'>Arc</a> begins</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawArc_sweepAngle'><code><strong>sweepAngle</strong></code></a></td>
|
|
<td>sweep angle in degrees; positive is clockwise</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawArc_useCenter'><code><strong>useCenter</strong></code></a></td>
|
|
<td>if true, include the center of the <a href='#SkCanvas_drawArc_oval'>oval</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawArc_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> stroke or fill, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="11f0fbe7b30d776913c2e7c92c02ff57"></fiddle-embed></div>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e91dbe45974489b8962c815017b7914f"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkPath_Reference#SkPath_arcTo'>SkPath::arcTo</a><sup><a href='SkPath_Reference#SkPath_arcTo_2'>[2]</a></sup><sup><a href='SkPath_Reference#SkPath_arcTo_3'>[3]</a></sup><sup><a href='SkPath_Reference#SkPath_arcTo_4'>[4]</a></sup><sup><a href='SkPath_Reference#SkPath_arcTo_5'>[5]</a></sup> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawOval'>drawOval</a> <a href='#SkCanvas_drawPath'>drawPath</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawRoundRect'></a>
|
|
## drawRoundRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawRoundRect'>drawRoundRect</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect, <a href='undocumented#SkScalar'>SkScalar</a> rx, <a href='undocumented#SkScalar'>SkScalar</a> ry, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkRRect_Reference#RRect'>Round Rect</a> bounded by <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawRoundRect_rect'>rect</a>, with corner radii (<a href='#SkCanvas_drawRoundRect_rx'>rx</a>, <a href='#SkCanvas_drawRoundRect_ry'>ry</a>) using <a href='#Clip'>Clip</a>,
|
|
<a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawRoundRect_paint'>paint</a>.
|
|
|
|
In <a href='#SkCanvas_drawRoundRect_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if <a href='SkRRect_Reference#RRect'>Round Rect</a> is stroked or filled;
|
|
if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness.
|
|
If <a href='#SkCanvas_drawRoundRect_rx'>rx</a> or <a href='#SkCanvas_drawRoundRect_ry'>ry</a> are less than zero, they are treated as if they are zero.
|
|
If <a href='#SkCanvas_drawRoundRect_rx'>rx</a> plus <a href='#SkCanvas_drawRoundRect_ry'>ry</a> exceeds <a href='#SkCanvas_drawRoundRect_rect'>rect</a> width or <a href='#SkCanvas_drawRoundRect_rect'>rect</a> height, radii are scaled down to fit.
|
|
If <a href='#SkCanvas_drawRoundRect_rx'>rx</a> and <a href='#SkCanvas_drawRoundRect_ry'>ry</a> are zero, <a href='SkRRect_Reference#RRect'>Round Rect</a> is drawn as <a href='SkRect_Reference#Rect'>Rect</a> and if stroked is affected by
|
|
<a href='SkPaint_Reference#Stroke_Join'>Paint Stroke Join</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawRoundRect_rect'><code><strong>rect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> bounds of <a href='SkRRect_Reference#RRect'>Round Rect</a> to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawRoundRect_rx'><code><strong>rx</strong></code></a></td>
|
|
<td>axis length on x-axis of oval describing rounded corners</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawRoundRect_ry'><code><strong>ry</strong></code></a></td>
|
|
<td>axis length on y-axis of oval describing rounded corners</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawRoundRect_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="199fe818c09026c114e165bff166a39f"><div>Top row has a zero radius a generates a rectangle.
|
|
Second row radii sum to less than sides.
|
|
Third row radii sum equals sides.
|
|
Fourth row radii sum exceeds sides; radii are scaled to fit.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
DrawRRect <a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawDRRect'>drawDRRect</a> <a href='#SkCanvas_drawPath'>drawPath</a> <a href='#SkCanvas_drawCircle'>drawCircle</a><sup><a href='#SkCanvas_drawCircle_2'>[2]</a></sup> <a href='#SkCanvas_drawOval'>drawOval</a> <a href='#SkCanvas_drawPoint'>drawPoint</a><sup><a href='#SkCanvas_drawPoint_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPath'></a>
|
|
## drawPath
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPath'>drawPath</a>(const <a href='SkPath_Reference#SkPath'>SkPath</a>& path, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkPath_Reference#Path'>Path</a> <a href='#SkCanvas_drawPath_path'>path</a> using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPath_paint'>paint</a>.
|
|
<a href='SkPath_Reference#Path'>Path</a> contains an array of <a href='SkPath_Reference#Contour'>Path Contour</a>, each of which may be open or closed.
|
|
|
|
In <a href='#SkCanvas_drawPath_paint'>paint</a>: <a href='SkPaint_Reference#Style'>Paint Style</a> determines if <a href='SkRRect_Reference#RRect'>Round Rect</a> is stroked or filled:
|
|
if filled, <a href='SkPath_Reference#Fill_Type'>Path Fill Type</a> determines whether <a href='SkPath_Reference#Contour'>Path Contour</a> describes inside or
|
|
outside of fill; if stroked, <a href='SkPaint_Reference#Stroke_Width'>Paint Stroke Width</a> describes the line thickness,
|
|
<a href='SkPaint_Reference#Stroke_Cap'>Paint Stroke Cap</a> describes line ends, and <a href='SkPaint_Reference#Stroke_Join'>Paint Stroke Join</a> describes how
|
|
corners are drawn.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPath_path'><code><strong>path</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Path'>Path</a> to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPath_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>stroke, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="fe2294131f422b8d6752f6a880f98ad9"><div>Top rows draw stroked <a href='#SkCanvas_drawPath_path'>path</a> with combinations of joins and caps. The open contour
|
|
is affected by caps; the closed contour is affected by joins.
|
|
Bottom row draws fill the same for open and closed contour.
|
|
First bottom column shows winding fills overlap.
|
|
Second bottom column shows even odd fills exclude overlap.
|
|
Third bottom column shows inverse winding fills area outside both contours.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkPath_Reference#SkPath'>SkPath</a> <a href='#SkCanvas_drawLine'>drawLine</a><sup><a href='#SkCanvas_drawLine_2'>[2]</a></sup> <a href='#SkCanvas_drawArc'>drawArc</a> <a href='#SkCanvas_drawRect'>drawRect</a> <a href='#SkCanvas_drawPoints'>drawPoints</a>
|
|
|
|
---
|
|
|
|
## <a name='Draw_Image'>Draw Image</a>
|
|
|
|
<a href='#SkCanvas_drawImage'>drawImage</a>, <a href='#SkCanvas_drawImageRect'>drawImageRect</a>, and <a href='#SkCanvas_drawImageNine'>drawImageNine</a> can be called with a bare pointer or
|
|
a smart pointer as a convenience. The pairs of calls are otherwise identical.
|
|
|
|
<a name='SkCanvas_drawImage'></a>
|
|
## drawImage
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImage'>drawImage</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* image, <a href='undocumented#SkScalar'>SkScalar</a> left, <a href='undocumented#SkScalar'>SkScalar</a> top, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImage_image'>image</a>, with its <a href='#SkCanvas_drawImage_top'>top</a>-<a href='#SkCanvas_drawImage_left'>left</a> corner at (<a href='#SkCanvas_drawImage_left'>left</a>, <a href='#SkCanvas_drawImage_top'>top</a>),
|
|
using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImage_paint'>paint</a>.
|
|
|
|
If <a href='#SkCanvas_drawImage_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>,
|
|
and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImage_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImage_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImage_image'>image</a> bounds. If generated
|
|
mask extends beyond <a href='#SkCanvas_drawImage_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImage_image'>image</a> edge colors, just as <a href='undocumented#Shader'>Shader</a>
|
|
made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the
|
|
<a href='#SkCanvas_drawImage_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImage_image'><code><strong>image</strong></code></a></td>
|
|
<td>uncompressed rectangular map of pixels</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImage_left'><code><strong>left</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawImage_left'>left</a> side of <a href='#SkCanvas_drawImage_image'>image</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImage_top'><code><strong>top</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawImage_top'>top</a> side of <a href='#SkCanvas_drawImage_image'>image</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImage_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="ac93f30dff13f8a8bb31398de370863b"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup> <a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup> <a href='SkPaint_Reference#SkPaint_setImageFilter'>SkPaint::setImageFilter</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImage_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImage'>drawImage</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkImage_Reference#SkImage'>SkImage</a>>& image, <a href='undocumented#SkScalar'>SkScalar</a> left, <a href='undocumented#SkScalar'>SkScalar</a> top,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImage_2_image'>image</a>, with its <a href='#SkCanvas_drawImage_2_top'>top</a>-<a href='#SkCanvas_drawImage_2_left'>left</a> corner at (<a href='#SkCanvas_drawImage_2_left'>left</a>, <a href='#SkCanvas_drawImage_2_top'>top</a>),
|
|
using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImage_2_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImage_2_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImage_2_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImage_2_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImage_2_image'>image</a> bounds. If generated
|
|
mask extends beyond <a href='#SkCanvas_drawImage_2_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImage_2_image'>image</a> edge colors, just as <a href='undocumented#Shader'>Shader</a>
|
|
made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the
|
|
<a href='#SkCanvas_drawImage_2_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImage_2_image'><code><strong>image</strong></code></a></td>
|
|
<td>uncompressed rectangular map of pixels</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImage_2_left'><code><strong>left</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawImage_2_left'>left</a> side of <a href='#SkCanvas_drawImage_2_image'>image</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImage_2_top'><code><strong>top</strong></code></a></td>
|
|
<td>pop side of <a href='#SkCanvas_drawImage_2_image'>image</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImage_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="a4e877e891b1be5faa2b7fd07f673a10"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup> <a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup> <a href='SkPaint_Reference#SkPaint_setImageFilter'>SkPaint::setImageFilter</a>
|
|
|
|
---
|
|
|
|
## <a name='SkCanvas_SrcRectConstraint'>Enum SkCanvas::SrcRectConstraint</a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
enum <a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> {
|
|
<a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>,
|
|
<a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a>,
|
|
};
|
|
</pre>
|
|
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> controls the behavior at the edge of source <a href='SkRect_Reference#Rect'>Rect</a>,
|
|
provided to <a href='#SkCanvas_drawImageRect'>drawImageRect</a>, trading off speed for precision.
|
|
|
|
<a href='undocumented#Image_Filter'>Image Filter</a> in <a href='SkPaint_Reference#Paint'>Paint</a> may sample multiple pixels in the image. Source <a href='SkRect_Reference#Rect'>Rect</a>
|
|
restricts the bounds of pixels that may be read. <a href='undocumented#Image_Filter'>Image Filter</a> may slow down if
|
|
it cannot read outside the bounds, when sampling near the edge of source <a href='SkRect_Reference#Rect'>Rect</a>.
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> specifies whether an <a href='undocumented#Image_Filter'>Image Filter</a> is allowed to read pixels
|
|
outside source <a href='SkRect_Reference#Rect'>Rect</a>.
|
|
|
|
### Constants
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
|
|
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kStrict_SrcRectConstraint'><code>SkCanvas::kStrict_SrcRectConstraint</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Requires <a href='undocumented#Image_Filter'>Image Filter</a> to respect source <a href='SkRect_Reference#Rect'>Rect</a>,
|
|
sampling only inside of its bounds, possibly with a performance penalty.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_kFast_SrcRectConstraint'><code>SkCanvas::kFast_SrcRectConstraint</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Permits <a href='undocumented#Image_Filter'>Image Filter</a> to sample outside of source <a href='SkRect_Reference#Rect'>Rect</a>
|
|
by half the width of <a href='undocumented#Image_Filter'>Image Filter</a>, permitting it to run faster but with
|
|
error at the image edges.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="5df49d1f4da37275a1f10ef7f1a749f0"><div>redBorder contains a black and white checkerboard bordered by red.
|
|
redBorder is drawn scaled by 16 on the left.
|
|
The middle and right bitmaps are filtered checkerboards.
|
|
Drawing the checkerboard with <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> shows only a blur of black and white.
|
|
Drawing the checkerboard with <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows red to bleed in the corners.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='SkPaint_Reference#SkPaint_setImageFilter'>SkPaint::setImageFilter</a>
|
|
|
|
<a name='SkCanvas_drawImageRect'></a>
|
|
## drawImageRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageRect'>drawImageRect</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* image, const <a href='SkRect_Reference#SkRect'>SkRect</a>& src, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint,
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_src'>src</a> of <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageRect_image'>image</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_dst'>dst</a>.
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImageRect_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageRect_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImageRect_image'>image</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageRect_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageRect_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageRect_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawImageRect_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawImageRect_src'>src</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageRect_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_src'><code><strong>src</strong></code></a></td>
|
|
<td>source <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_image'>image</a> to draw from</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawImageRect_src'>src</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="bfd18e9cac896cdf94c9f154ccf94be8"><div>The left bitmap draws with <a href='SkPaint_Reference#Paint'>Paint</a> default <a href='undocumented#kNone_SkFilterQuality'>kNone_SkFilterQuality</a>, and stays within
|
|
its bounds; there is no bleeding with <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a>.
|
|
the middle and right bitmaps draw with <a href='undocumented#kLow_SkFilterQuality'>kLow_SkFilterQuality</a>; with
|
|
<a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>, the filter remains within the checkerboard, and
|
|
with <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> red bleeds on the edges.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageRect_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageRect'>drawImageRect</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* image, const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& isrc, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint,
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_drawImageRect_2_isrc'>isrc</a> of <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageRect_2_image'>image</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_2_dst'>dst</a>.
|
|
Note that <a href='#SkCanvas_drawImageRect_2_isrc'>isrc</a> is on integer pixel boundaries; <a href='#SkCanvas_drawImageRect_2_dst'>dst</a> may include fractional
|
|
boundaries. Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a>
|
|
<a href='#SkCanvas_drawImageRect_2_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_2_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImageRect_2_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageRect_2_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImageRect_2_image'>image</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageRect_2_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageRect_2_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageRect_2_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawImageRect_2_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawImageRect_2_isrc'>isrc</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageRect_2_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_2_isrc'><code><strong>isrc</strong></code></a></td>
|
|
<td>source <a href='SkIRect_Reference#IRect'>IRect</a> of <a href='#SkCanvas_drawImageRect_2_image'>image</a> to draw from</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_2_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_2_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_2_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawImageRect_2_isrc'>isrc</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7f92cd5c9b9f4b1ac3cd933b08037bfe"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageRect_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageRect'>drawImageRect</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* image, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint,
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageRect_3_image'>image</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_3_dst'>dst</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>,
|
|
and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_3_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_3_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImageRect_3_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageRect_3_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImageRect_3_image'>image</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageRect_3_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageRect_3_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageRect_3_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawImageRect_3_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawImageRect_3_image'>image</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageRect_3_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_3_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_3_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_3_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_3_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawImageRect_3_image'>image</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="3cf8fb639fef99993cafc064d550c739"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageRect_4'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageRect'>drawImageRect</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkImage_Reference#SkImage'>SkImage</a>>& image, const <a href='SkRect_Reference#SkRect'>SkRect</a>& src, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint, <a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_4_src'>src</a> of <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageRect_4_image'>image</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_4_dst'>dst</a>.
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_4_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_4_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImageRect_4_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageRect_4_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImageRect_4_image'>image</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageRect_4_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageRect_4_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageRect_4_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawImageRect_4_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawImageRect_4_src'>src</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageRect_4_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_4_src'><code><strong>src</strong></code></a></td>
|
|
<td>source <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_4_image'>image</a> to draw from</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_4_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_4_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_4_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_4_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawImageRect_4_src'>src</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="d4b35a9d24c32c042bd1f529b8de3c0d"><div><a href='#Canvas'>Canvas</a> scales and translates; transformation from <a href='#SkCanvas_drawImageRect_4_src'>src</a> to <a href='#SkCanvas_drawImageRect_4_dst'>dst</a> also scales.
|
|
The two matrices are concatenated to create the final transformation.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageRect_5'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageRect'>drawImageRect</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkImage_Reference#SkImage'>SkImage</a>>& image, const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& isrc, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint, <a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_drawImageRect_5_isrc'>isrc</a> of <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageRect_5_image'>image</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_5_dst'>dst</a>.
|
|
<a href='#SkCanvas_drawImageRect_5_isrc'>isrc</a> is on integer pixel boundaries; <a href='#SkCanvas_drawImageRect_5_dst'>dst</a> may include fractional boundaries.
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_5_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_5_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImageRect_5_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageRect_5_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImageRect_5_image'>image</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageRect_5_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageRect_5_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageRect_5_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawImageRect_5_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawImageRect_5_image'>image</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageRect_5_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_5_isrc'><code><strong>isrc</strong></code></a></td>
|
|
<td>source <a href='SkIRect_Reference#IRect'>IRect</a> of <a href='#SkCanvas_drawImageRect_5_image'>image</a> to draw from</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_5_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_5_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_5_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_5_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawImageRect_5_image'>image</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="d307e7e1237f39fb54d80723e5449857"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageRect_6'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageRect'>drawImageRect</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkImage_Reference#SkImage'>SkImage</a>>& image, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint,
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageRect_6_image'>image</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageRect_6_dst'>dst</a>,
|
|
using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_6_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageRect_6_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawImageRect_6_image'>image</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageRect_6_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawImageRect_6_image'>image</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageRect_6_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageRect_6_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageRect_6_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawImageRect_6_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawImageRect_6_image'>image</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageRect_6_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_6_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageRect_6_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_6_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageRect_6_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawImageRect_6_image'>image</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="3a47ef94cb70144455f80333d8653e6c"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageNine'></a>
|
|
## drawImageNine
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageNine'>drawImageNine</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* image, const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& center, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageNine_image'>image</a> stretched proportionally to fit into <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageNine_dst'>dst</a>.
|
|
<a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_drawImageNine_center'>center</a> divides the <a href='#SkCanvas_drawImageNine_image'>image</a> into nine sections: four sides, four corners, and
|
|
the <a href='#SkCanvas_drawImageNine_center'>center</a>. Corners are unmodified or scaled down proportionately if their sides
|
|
are larger than <a href='#SkCanvas_drawImageNine_dst'>dst</a>; <a href='#SkCanvas_drawImageNine_center'>center</a> and four sides are scaled to fit remaining space, if any.
|
|
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageNine_paint'>paint</a>.
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageNine_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If image is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageNine_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from image bounds. If <a href='#SkCanvas_drawImageNine_paint'>paint</a>
|
|
<a href='undocumented#Filter_Quality'>Filter Quality</a> set to <a href='undocumented#kNone_SkFilterQuality'>kNone_SkFilterQuality</a>, disable pixel filtering. For all
|
|
other values of <a href='#SkCanvas_drawImageNine_paint'>paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a>, use <a href='undocumented#kLow_SkFilterQuality'>kLow_SkFilterQuality</a> to filter pixels.
|
|
Any <a href='undocumented#SkMaskFilter'>SkMaskFilter</a> on <a href='#SkCanvas_drawImageNine_paint'>paint</a> is ignored as is <a href='#SkCanvas_drawImageNine_paint'>paint</a> <a href='SkPaint_Reference#Anti_Alias'>Anti Aliasing</a> state.
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageNine_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageNine_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageNine_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageNine_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageNine_center'><code><strong>center</strong></code></a></td>
|
|
<td><a href='SkIRect_Reference#IRect'>IRect</a> edge of <a href='#SkCanvas_drawImageNine_image'>image</a> corners and sides</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageNine_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageNine_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageNine_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4f153cf1d0dbe1a95acf5badeec14dae"><div>The leftmost <a href='#SkCanvas_drawImageNine_image'>image</a> is smaller than <a href='#SkCanvas_drawImageNine_center'>center</a>; only corners are drawn, all scaled to fit.
|
|
The second <a href='#SkCanvas_drawImageNine_image'>image</a> equals the size of <a href='#SkCanvas_drawImageNine_center'>center</a>; only corners are drawn without scaling.
|
|
The remaining images are larger than <a href='#SkCanvas_drawImageNine_center'>center</a>. All corners draw without scaling.
|
|
The sides and <a href='#SkCanvas_drawImageNine_center'>center</a> are scaled if needed to take up the remaining space.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageNine_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageNine'>drawImageNine</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkImage_Reference#SkImage'>SkImage</a>>& image, const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& center, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageNine_2_image'>image</a> stretched proportionally to fit into <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageNine_2_dst'>dst</a>.
|
|
<a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_drawImageNine_2_center'>center</a> divides the <a href='#SkCanvas_drawImageNine_2_image'>image</a> into nine sections: four sides, four corners, and
|
|
the <a href='#SkCanvas_drawImageNine_2_center'>center</a>. Corners are not scaled, or scaled down proportionately if their sides
|
|
are larger than <a href='#SkCanvas_drawImageNine_2_dst'>dst</a>; <a href='#SkCanvas_drawImageNine_2_center'>center</a> and four sides are scaled to fit remaining space, if any.
|
|
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageNine_2_paint'>paint</a>.
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageNine_2_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If image is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageNine_2_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from image bounds. If <a href='#SkCanvas_drawImageNine_2_paint'>paint</a>
|
|
<a href='undocumented#Filter_Quality'>Filter Quality</a> set to <a href='undocumented#kNone_SkFilterQuality'>kNone_SkFilterQuality</a>, disable pixel filtering. For all
|
|
other values of <a href='#SkCanvas_drawImageNine_2_paint'>paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a>, use <a href='undocumented#kLow_SkFilterQuality'>kLow_SkFilterQuality</a> to filter pixels.
|
|
Any <a href='undocumented#SkMaskFilter'>SkMaskFilter</a> on <a href='#SkCanvas_drawImageNine_2_paint'>paint</a> is ignored as is <a href='#SkCanvas_drawImageNine_2_paint'>paint</a> <a href='SkPaint_Reference#Anti_Alias'>Anti Aliasing</a> state.
|
|
If generated mask extends beyond <a href='#SkCanvas_drawImageNine_2_image'>image</a> bounds, replicate <a href='#SkCanvas_drawImageNine_2_image'>image</a> edge colors, just
|
|
as <a href='undocumented#Shader'>Shader</a> made from <a href='SkImage_Reference#SkImage_makeShader'>SkImage::makeShader</a> with <a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set
|
|
replicates the <a href='#SkCanvas_drawImageNine_2_image'>image</a> edge color when it samples outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageNine_2_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageNine_2_center'><code><strong>center</strong></code></a></td>
|
|
<td><a href='SkIRect_Reference#IRect'>IRect</a> edge of <a href='#SkCanvas_drawImageNine_2_image'>image</a> corners and sides</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageNine_2_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageNine_2_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageNine_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="d597d9af8d17fd93e634dd12017058e2"><div>The two leftmost images has four corners and sides to the left and right of <a href='#SkCanvas_drawImageNine_2_center'>center</a>.
|
|
The leftmost <a href='#SkCanvas_drawImageNine_2_image'>image</a> scales the width of corners proportionately to fit.
|
|
The third and fourth <a href='#SkCanvas_drawImageNine_2_image'>image</a> corners are not scaled; the sides and <a href='#SkCanvas_drawImageNine_2_center'>center</a> are scaled to
|
|
fill the remaining space.
|
|
The rightmost <a href='#SkCanvas_drawImageNine_2_image'>image</a> has four corners scaled vertically to fit, and uses sides above
|
|
and below <a href='#SkCanvas_drawImageNine_2_center'>center</a> to fill the remaining space.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a> <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawBitmap'></a>
|
|
## drawBitmap
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawBitmap'>drawBitmap</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, <a href='undocumented#SkScalar'>SkScalar</a> left, <a href='undocumented#SkScalar'>SkScalar</a> top, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a>, with its <a href='#SkCanvas_drawBitmap_top'>top</a>-<a href='#SkCanvas_drawBitmap_left'>left</a> corner at (<a href='#SkCanvas_drawBitmap_left'>left</a>, <a href='#SkCanvas_drawBitmap_top'>top</a>),
|
|
using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmap_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmap_paint'>paint</a> is not nullptr, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawBitmap_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a> bounds, replicate <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a> edge colors,
|
|
just as <a href='undocumented#Shader'>Shader</a> made from <a href='undocumented#SkShader_MakeBitmapShader'>SkShader::MakeBitmapShader</a> with
|
|
<a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a> edge color when it samples
|
|
outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawBitmap_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td><a href='SkBitmap_Reference#Bitmap'>Bitmap</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmap_left'><code><strong>left</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawBitmap_left'>left</a> side of <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmap_top'><code><strong>top</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawBitmap_top'>top</a> side of <a href='#SkCanvas_drawBitmap_bitmap'>bitmap</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmap_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4a521be1f850058541e136a808c65e78"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a> <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a> <a href='#SkCanvas_drawBitmapRect'>drawBitmapRect</a><sup><a href='#SkCanvas_drawBitmapRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawBitmapRect_3'>[3]</a></sup> <a href='SkBitmap_Reference#SkBitmap_readPixels'>SkBitmap::readPixels</a><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_2'>[2]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_3'>[3]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_readPixels_4'>[4]</a></sup> <a href='SkBitmap_Reference#SkBitmap_writePixels'>SkBitmap::writePixels</a><sup><a href='SkBitmap_Reference#SkBitmap_writePixels_2'>[2]</a></sup><sup><a href='SkBitmap_Reference#SkBitmap_writePixels_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawBitmapRect'></a>
|
|
## drawBitmapRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawBitmapRect'>drawBitmapRect</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, const <a href='SkRect_Reference#SkRect'>SkRect</a>& src, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint, <a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawBitmapRect_src'>src</a> of <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> <a href='#SkCanvas_drawBitmapRect_bitmap'>bitmap</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawBitmapRect_dst'>dst</a>.
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapRect_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapRect_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawBitmapRect_bitmap'>bitmap</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawBitmapRect_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawBitmapRect_bitmap'>bitmap</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawBitmapRect_bitmap'>bitmap</a> bounds, replicate <a href='#SkCanvas_drawBitmapRect_bitmap'>bitmap</a> edge colors,
|
|
just as <a href='undocumented#Shader'>Shader</a> made from <a href='undocumented#SkShader_MakeBitmapShader'>SkShader::MakeBitmapShader</a> with
|
|
<a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the <a href='#SkCanvas_drawBitmapRect_bitmap'>bitmap</a> edge color when it samples
|
|
outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawBitmapRect_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawBitmapRect_src'>src</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawBitmapRect_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td><a href='SkBitmap_Reference#Bitmap'>Bitmap</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_src'><code><strong>src</strong></code></a></td>
|
|
<td>source <a href='SkRect_Reference#Rect'>Rect</a> of image to draw from</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of image to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawBitmapRect_src'>src</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7d04932f2a259cc70d6e45cd25a6feb6"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a> <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawBitmapRect_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawBitmapRect'>drawBitmapRect</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& isrc, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint, <a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_drawBitmapRect_2_isrc'>isrc</a> of <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> <a href='#SkCanvas_drawBitmapRect_2_bitmap'>bitmap</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawBitmapRect_2_dst'>dst</a>.
|
|
<a href='#SkCanvas_drawBitmapRect_2_isrc'>isrc</a> is on integer pixel boundaries; <a href='#SkCanvas_drawBitmapRect_2_dst'>dst</a> may include fractional boundaries.
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapRect_2_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapRect_2_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawBitmapRect_2_bitmap'>bitmap</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawBitmapRect_2_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawBitmapRect_2_bitmap'>bitmap</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawBitmapRect_2_bitmap'>bitmap</a> bounds, replicate <a href='#SkCanvas_drawBitmapRect_2_bitmap'>bitmap</a> edge colors,
|
|
just as <a href='undocumented#Shader'>Shader</a> made from <a href='undocumented#SkShader_MakeBitmapShader'>SkShader::MakeBitmapShader</a> with
|
|
<a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the <a href='#SkCanvas_drawBitmapRect_2_bitmap'>bitmap</a> edge color when it samples
|
|
outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawBitmapRect_2_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawBitmapRect_2_isrc'>isrc</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawBitmapRect_2_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td><a href='SkBitmap_Reference#Bitmap'>Bitmap</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_2_isrc'><code><strong>isrc</strong></code></a></td>
|
|
<td>source <a href='SkIRect_Reference#IRect'>IRect</a> of image to draw from</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_2_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of image to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_2_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>sample strictly within <a href='#SkCanvas_drawBitmapRect_2_isrc'>isrc</a>, or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="0a3c6d2459566e58cee7d4910655ee21"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a> <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawBitmapRect_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawBitmapRect'>drawBitmapRect</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint,
|
|
<a href='#SkCanvas_SrcRectConstraint'>SrcRectConstraint</a> constraint = <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a>)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a>, scaled and translated to fill <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawBitmapRect_3_dst'>dst</a>.
|
|
<a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a> bounds is on integer pixel boundaries; <a href='#SkCanvas_drawBitmapRect_3_dst'>dst</a> may include fractional boundaries.
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapRect_3_paint'>paint</a>.
|
|
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapRect_3_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a> is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawBitmapRect_3_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a> bounds.
|
|
|
|
If generated mask extends beyond <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a> bounds, replicate <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a> edge colors,
|
|
just as <a href='undocumented#Shader'>Shader</a> made from <a href='undocumented#SkShader_MakeBitmapShader'>SkShader::MakeBitmapShader</a> with
|
|
<a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a> edge color when it samples
|
|
outside of its bounds.
|
|
|
|
<a href='#SkCanvas_drawBitmapRect_3_constraint'>constraint</a> set to <a href='#SkCanvas_kStrict_SrcRectConstraint'>kStrict SrcRectConstraint</a> limits <a href='SkPaint_Reference#Paint'>Paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a> to
|
|
sample within <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a>; set to <a href='#SkCanvas_kFast_SrcRectConstraint'>kFast SrcRectConstraint</a> allows sampling outside to
|
|
improve performance.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawBitmapRect_3_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td><a href='SkBitmap_Reference#Bitmap'>Bitmap</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_3_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of image to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_3_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapRect_3_constraint'><code><strong>constraint</strong></code></a></td>
|
|
<td>filter strictly within <a href='#SkCanvas_drawBitmapRect_3_bitmap'>bitmap</a> or draw faster</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="bdbeac3c97f60a63987b1cc8e1f1e91e"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImageRect'>drawImageRect</a><sup><a href='#SkCanvas_drawImageRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawImageRect_3'>[3]</a></sup><sup><a href='#SkCanvas_drawImageRect_4'>[4]</a></sup><sup><a href='#SkCanvas_drawImageRect_5'>[5]</a></sup><sup><a href='#SkCanvas_drawImageRect_6'>[6]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a> <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawBitmapNine'></a>
|
|
## drawBitmapNine
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>& center, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> stretched proportionally to fit into <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawBitmapNine_dst'>dst</a>.
|
|
<a href='SkIRect_Reference#IRect'>IRect</a> <a href='#SkCanvas_drawBitmapNine_center'>center</a> divides the <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> into nine sections: four sides, four corners,
|
|
and the <a href='#SkCanvas_drawBitmapNine_center'>center</a>. Corners are not scaled, or scaled down proportionately if their
|
|
sides are larger than <a href='#SkCanvas_drawBitmapNine_dst'>dst</a>; <a href='#SkCanvas_drawBitmapNine_center'>center</a> and four sides are scaled to fit remaining
|
|
space, if any.
|
|
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapNine_paint'>paint</a>.
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapNine_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If bitmap is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawBitmapNine_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from bitmap bounds. If <a href='#SkCanvas_drawBitmapNine_paint'>paint</a>
|
|
<a href='undocumented#Filter_Quality'>Filter Quality</a> set to <a href='undocumented#kNone_SkFilterQuality'>kNone_SkFilterQuality</a>, disable pixel filtering. For all
|
|
other values of <a href='#SkCanvas_drawBitmapNine_paint'>paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a>, use <a href='undocumented#kLow_SkFilterQuality'>kLow_SkFilterQuality</a> to filter pixels.
|
|
Any <a href='undocumented#SkMaskFilter'>SkMaskFilter</a> on <a href='#SkCanvas_drawBitmapNine_paint'>paint</a> is ignored as is <a href='#SkCanvas_drawBitmapNine_paint'>paint</a> <a href='SkPaint_Reference#Anti_Alias'>Anti Aliasing</a> state.
|
|
If generated mask extends beyond <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> bounds, replicate <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> edge colors,
|
|
just as <a href='undocumented#Shader'>Shader</a> made from <a href='undocumented#SkShader_MakeBitmapShader'>SkShader::MakeBitmapShader</a> with
|
|
<a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> edge color when it samples
|
|
outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawBitmapNine_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td><a href='SkBitmap_Reference#Bitmap'>Bitmap</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapNine_center'><code><strong>center</strong></code></a></td>
|
|
<td><a href='SkIRect_Reference#IRect'>IRect</a> edge of image corners and sides</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapNine_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of image to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapNine_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e99e7be0d8f67dfacbecf85df585433d"><div>The two leftmost <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> draws has four corners and sides to the left and right of <a href='#SkCanvas_drawBitmapNine_center'>center</a>.
|
|
The leftmost <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> draw scales the width of corners proportionately to fit.
|
|
The third and fourth draw corners are not scaled; the sides and <a href='#SkCanvas_drawBitmapNine_center'>center</a> are scaled to
|
|
fill the remaining space.
|
|
The rightmost <a href='#SkCanvas_drawBitmapNine_bitmap'>bitmap</a> draw has four corners scaled vertically to fit, and uses sides above
|
|
and below <a href='#SkCanvas_drawBitmapNine_center'>center</a> to fill the remaining space.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a> <a href='#SkCanvas_drawBitmapRect'>drawBitmapRect</a><sup><a href='#SkCanvas_drawBitmapRect_2'>[2]</a></sup><sup><a href='#SkCanvas_drawBitmapRect_3'>[3]</a></sup>
|
|
|
|
---
|
|
|
|
## <a name='Draw_Image_Lattice'>Draw Image Lattice</a>
|
|
|
|
# <a name='SkCanvas_Lattice'>Struct SkCanvas::Lattice</a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
struct <a href='#SkCanvas_Lattice'>Lattice</a> {
|
|
enum <a href='#SkCanvas_Lattice_RectType'>RectType</a> ...
|
|
|
|
const int* <a href='#SkCanvas_Lattice_fXDivs'>fXDivs</a>;
|
|
const int* <a href='#SkCanvas_Lattice_fYDivs'>fYDivs</a>;
|
|
const <a href='#SkCanvas_Lattice_RectType'>RectType</a>* <a href='#SkCanvas_Lattice_fRectTypes'>fRectTypes</a>;
|
|
int <a href='#SkCanvas_Lattice_fXCount'>fXCount</a>;
|
|
int <a href='#SkCanvas_Lattice_fYCount'>fYCount</a>;
|
|
const <a href='SkIRect_Reference#SkIRect'>SkIRect</a>* <a href='#SkCanvas_Lattice_fBounds'>fBounds</a>;
|
|
const <a href='SkColor_Reference#SkColor'>SkColor</a>* <a href='#SkCanvas_Lattice_fColors'>fColors</a>;
|
|
};
|
|
</pre>
|
|
|
|
<a href='#SkCanvas_Lattice'>Lattice</a> divides <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> or <a href='SkImage_Reference#Image'>Image</a> into a rectangular grid.
|
|
Grid entries on even columns and even rows are fixed; these entries are
|
|
always drawn at their original size if the destination is large enough.
|
|
If the destination side is too small to hold the fixed entries, all fixed
|
|
entries are proportionately scaled down to fit.
|
|
The grid entries not on even columns and rows are scaled to fit the
|
|
remaining space, if any.
|
|
|
|
## <a name='Draw_Image_Lattice_Overview'>Draw Image Lattice Overview</a>
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Draw_Image_Lattice_Constant'>Constants</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>enum and enum class, and their const values</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Draw_Image_Lattice_Member'>Members</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>member values</td>
|
|
</tr>
|
|
</table>
|
|
|
|
|
|
## <a name='Draw_Image_Lattice_Constant'>Draw Image Lattice Constant</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
</table>
|
|
|
|
## <a name='SkCanvas_Lattice_RectType'>Enum SkCanvas::Lattice::RectType</a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
enum <a href='#SkCanvas_Lattice_RectType'>RectType</a> : uint8_t {
|
|
<a href='#SkCanvas_Lattice_kDefault'>kDefault</a> = 0,
|
|
<a href='#SkCanvas_Lattice_kTransparent'>kTransparent</a>,
|
|
<a href='#SkCanvas_Lattice_kFixedColor'>kFixedColor</a>,
|
|
};
|
|
</pre>
|
|
|
|
Optional setting per rectangular grid entry to make it transparent,
|
|
or to fill the grid entry with a color.
|
|
|
|
### Constants
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
|
|
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_kDefault'><code>SkCanvas::Lattice::kDefault</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
draws Bitmap into lattice rectangle</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_kTransparent'><code>SkCanvas::Lattice::kTransparent</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
skips lattice rectangle by making it transparent</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_kFixedColor'><code>SkCanvas::Lattice::kFixedColor</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
draws one of fColors into lattice rectangle</td>
|
|
</tr>
|
|
</table>
|
|
|
|
## <a name='Draw_Image_Lattice_Member'>Draw Image Lattice Member</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
</table>
|
|
|
|
### Members
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Type</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Name</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const int*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_fXDivs'><code>fXDivs</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Array of x-axis values that divide the bitmap vertically.
|
|
Array entries must be unique, increasing, greater than or equal to
|
|
<a href='#SkCanvas_Lattice_fBounds'>fBounds</a> left edge, and less than <a href='#SkCanvas_Lattice_fBounds'>fBounds</a> right edge.
|
|
Set the first element to <a href='#SkCanvas_Lattice_fBounds'>fBounds</a> left to collapse the left column of
|
|
fixed grid entries.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const int*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_fYDivs'><code>fYDivs</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Array of y-axis values that divide the bitmap horizontally.
|
|
Array entries must be unique, increasing, greater than or equal to
|
|
<a href='#SkCanvas_Lattice_fBounds'>fBounds</a> top edge, and less than <a href='#SkCanvas_Lattice_fBounds'>fBounds</a> bottom edge.
|
|
Set the first element to <a href='#SkCanvas_Lattice_fBounds'>fBounds</a> top to collapse the top row of fixed
|
|
grid entries.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const RectType*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_fRectTypes'><code>fRectTypes</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Optional array of fill types, one per rectangular grid entry:
|
|
array length must be( <a href='#SkCanvas_Lattice_fXCount'>fXCount</a> + 1) * (<a href='#SkCanvas_Lattice_fYCount'>fYCount</a> + 1)
|
|
.
|
|
|
|
Each <a href='#SkCanvas_Lattice_RectType'>RectType</a> is one of: <a href='#SkCanvas_Lattice_kDefault'>kDefault</a>, <a href='#SkCanvas_Lattice_kTransparent'>kTransparent</a>, <a href='#SkCanvas_Lattice_kFixedColor'>kFixedColor</a>.
|
|
|
|
Array entries correspond to the rectangular grid entries, ascending
|
|
left to right and then top to bottom.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>int</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_fXCount'><code>fXCount</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Number of entries in <a href='#SkCanvas_Lattice_fXDivs'>fXDivs</a> array; one less than the number of
|
|
horizontal divisions.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>int</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_fYCount'><code>fYCount</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Number of entries in <a href='#SkCanvas_Lattice_fYDivs'>fYDivs</a> array; one less than the number of vertical
|
|
divisions.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const SkIRect*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_fBounds'><code>fBounds</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Optional subset <a href='SkIRect_Reference#IRect'>IRect</a> source to draw from.
|
|
If nullptr, source bounds is dimensions of <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> or <a href='SkImage_Reference#Image'>Image</a>.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>const SkColor*</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkCanvas_Lattice_fColors'><code>fColors</code></a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Optional array of colors, one per rectangular grid entry.
|
|
Array length must be( <a href='#SkCanvas_Lattice_fXCount'>fXCount</a> + 1) * (<a href='#SkCanvas_Lattice_fYCount'>fYCount</a> + 1)
|
|
.
|
|
|
|
Array entries correspond to the rectangular grid entries, ascending
|
|
left to right, then top to bottom.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_drawBitmapLattice'></a>
|
|
## drawBitmapLattice
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& bitmap, const <a href='#SkCanvas_Lattice'>Lattice</a>& lattice, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> stretched proportionally to fit into <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawBitmapLattice_dst'>dst</a>.
|
|
|
|
<a href='#SkCanvas_Lattice'>Lattice</a> <a href='#SkCanvas_drawBitmapLattice_lattice'>lattice</a> divides <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> into a rectangular grid.
|
|
Each intersection of an even-numbered row and column is fixed; like the corners
|
|
of <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a>, fixed <a href='#SkCanvas_drawBitmapLattice_lattice'>lattice</a> elements never scale larger than their initial
|
|
size and shrink proportionately when all fixed elements exceed the <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a>
|
|
dimension. All other grid elements scale to fill the available space, if any.
|
|
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapLattice_paint'>paint</a>.
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawBitmapLattice_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If bitmap is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawBitmapLattice_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from bitmap bounds. If <a href='#SkCanvas_drawBitmapLattice_paint'>paint</a>
|
|
<a href='undocumented#Filter_Quality'>Filter Quality</a> set to <a href='undocumented#kNone_SkFilterQuality'>kNone_SkFilterQuality</a>, disable pixel filtering. For all
|
|
other values of <a href='#SkCanvas_drawBitmapLattice_paint'>paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a>, use <a href='undocumented#kLow_SkFilterQuality'>kLow_SkFilterQuality</a> to filter pixels.
|
|
Any <a href='undocumented#SkMaskFilter'>SkMaskFilter</a> on <a href='#SkCanvas_drawBitmapLattice_paint'>paint</a> is ignored as is <a href='#SkCanvas_drawBitmapLattice_paint'>paint</a> <a href='SkPaint_Reference#Anti_Alias'>Anti Aliasing</a> state.
|
|
If generated mask extends beyond <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> bounds, replicate <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> edge colors,
|
|
just as <a href='undocumented#Shader'>Shader</a> made from <a href='undocumented#SkShader_MakeBitmapShader'>SkShader::MakeBitmapShader</a> with
|
|
<a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> edge color when it samples
|
|
outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawBitmapLattice_bitmap'><code><strong>bitmap</strong></code></a></td>
|
|
<td><a href='SkBitmap_Reference#Bitmap'>Bitmap</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapLattice_lattice'><code><strong>lattice</strong></code></a></td>
|
|
<td>division of <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> into fixed and variable rectangles</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapLattice_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of image to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawBitmapLattice_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="c5bfa944e17ba4a4400dc799f032069c"><div>The two leftmost <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> draws has four corners and sides to the left and right of center.
|
|
The leftmost <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> draw scales the width of corners proportionately to fit.
|
|
The third and fourth draw corners are not scaled; the sides are scaled to
|
|
fill the remaining space; the center is transparent.
|
|
The rightmost <a href='#SkCanvas_drawBitmapLattice_bitmap'>bitmap</a> draw has four corners scaled vertically to fit, and uses sides above
|
|
and below center to fill the remaining space.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawImageLattice'>drawImageLattice</a> <a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a> <a href='#SkCanvas_Lattice'>Lattice</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawImageLattice'></a>
|
|
## drawImageLattice
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawImageLattice'>drawImageLattice</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* image, const <a href='#SkCanvas_Lattice'>Lattice</a>& lattice, const <a href='SkRect_Reference#SkRect'>SkRect</a>& dst,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkImage_Reference#Image'>Image</a> <a href='#SkCanvas_drawImageLattice_image'>image</a> stretched proportionally to fit into <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawImageLattice_dst'>dst</a>.
|
|
|
|
<a href='#SkCanvas_Lattice'>Lattice</a> <a href='#SkCanvas_drawImageLattice_lattice'>lattice</a> divides <a href='#SkCanvas_drawImageLattice_image'>image</a> into a rectangular grid.
|
|
Each intersection of an even-numbered row and column is fixed; like the corners
|
|
of <a href='#SkCanvas_drawBitmapNine'>drawBitmapNine</a>, fixed <a href='#SkCanvas_drawImageLattice_lattice'>lattice</a> elements never scale larger than their initial
|
|
size and shrink proportionately when all fixed elements exceed the bitmap
|
|
dimension. All other grid elements scale to fill the available space, if any.
|
|
|
|
Additionally transform draw using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageLattice_paint'>paint</a>.
|
|
If <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawImageLattice_paint'>paint</a> is supplied, apply <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
<a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>. If image is <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, apply <a href='undocumented#Shader'>Shader</a>.
|
|
If <a href='#SkCanvas_drawImageLattice_paint'>paint</a> contains <a href='undocumented#Mask_Filter'>Mask Filter</a>, generate mask from image bounds. If <a href='#SkCanvas_drawImageLattice_paint'>paint</a>
|
|
<a href='undocumented#Filter_Quality'>Filter Quality</a> set to <a href='undocumented#kNone_SkFilterQuality'>kNone_SkFilterQuality</a>, disable pixel filtering. For all
|
|
other values of <a href='#SkCanvas_drawImageLattice_paint'>paint</a> <a href='undocumented#Filter_Quality'>Filter Quality</a>, use <a href='undocumented#kLow_SkFilterQuality'>kLow_SkFilterQuality</a> to filter pixels.
|
|
Any <a href='undocumented#SkMaskFilter'>SkMaskFilter</a> on <a href='#SkCanvas_drawImageLattice_paint'>paint</a> is ignored as is <a href='#SkCanvas_drawImageLattice_paint'>paint</a> <a href='SkPaint_Reference#Anti_Alias'>Anti Aliasing</a> state.
|
|
If generated mask extends beyond bitmap bounds, replicate bitmap edge colors,
|
|
just as <a href='undocumented#Shader'>Shader</a> made from <a href='undocumented#SkShader_MakeBitmapShader'>SkShader::MakeBitmapShader</a> with
|
|
<a href='undocumented#SkShader_kClamp_TileMode'>SkShader::kClamp TileMode</a> set replicates the bitmap edge color when it samples
|
|
outside of its bounds.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawImageLattice_image'><code><strong>image</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing pixels, dimensions, and format</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageLattice_lattice'><code><strong>lattice</strong></code></a></td>
|
|
<td>division of bitmap into fixed and variable rectangles</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageLattice_dst'><code><strong>dst</strong></code></a></td>
|
|
<td>destination <a href='SkRect_Reference#Rect'>Rect</a> of <a href='#SkCanvas_drawImageLattice_image'>image</a> to draw to</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawImageLattice_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> containing <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>,
|
|
and so on; or nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4f153cf1d0dbe1a95acf5badeec14dae"><div>The leftmost <a href='#SkCanvas_drawImageLattice_image'>image</a> is smaller than center; only corners are drawn, all scaled to fit.
|
|
The second <a href='#SkCanvas_drawImageLattice_image'>image</a> equals the size of center; only corners are drawn without scaling.
|
|
The remaining images are larger than center. All corners draw without scaling. The sides
|
|
are scaled if needed to take up the remaining space; the center is transparent.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawBitmapLattice'>drawBitmapLattice</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup> <a href='#SkCanvas_drawImageNine'>drawImageNine</a><sup><a href='#SkCanvas_drawImageNine_2'>[2]</a></sup> <a href='#SkCanvas_Lattice'>Lattice</a>
|
|
|
|
---
|
|
|
|
## <a name='Draw_Text'>Draw Text</a>
|
|
|
|
|
|
<table style='border-collapse: collapse; width: 62.5em'>
|
|
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Topic</th>
|
|
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPosText'>drawPosText</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text at array of (x, y) positions</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawPosTextH'>drawPosTextH</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text at x positions with common baseline</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawString'>drawString</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws null terminated string at (x, y) using font advance</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawString'>drawString(const char* string, SkScalar x, SkScalar y, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawString_2'>drawString(const SkString& string, SkScalar x, SkScalar y, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawText'>drawText</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text at (x, y), using font advance</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextBlob'>drawTextBlob</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text with arrays of positions and <a href='SkPaint_Reference#Paint'>Paint</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextBlob'>drawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextBlob_2'>drawTextBlob(const sk sp<SkTextBlob>& blob, SkScalar x, SkScalar y, const SkPaint& paint)</a></td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text following <a href='SkPath_Reference#Path'>Path</a> contour</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextOnPathHV'>drawTextOnPathHV</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text following <a href='SkPath_Reference#Path'>Path</a> with offsets</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>draws text with array of <a href='undocumented#RSXform'>RSXform</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a name='SkCanvas_drawText'></a>
|
|
## drawText
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawText'>drawText</a>(const void* text, size_t byteLength, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='#SkCanvas_drawText_text'>text</a>, with origin at (<a href='#SkCanvas_drawText_x'>x</a>, <a href='#SkCanvas_drawText_y'>y</a>), using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawText_paint'>paint</a>.
|
|
|
|
<a href='#SkCanvas_drawText_text'>text</a> meaning depends on <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a>; by default, <a href='#SkCanvas_drawText_text'>text</a> is encoded as
|
|
UTF-8.
|
|
|
|
<a href='#SkCanvas_drawText_x'>x</a> and <a href='#SkCanvas_drawText_y'>y</a> meaning depends on <a href='SkPaint_Reference#Text_Align'>Paint Text Align</a> and <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>; by default
|
|
<a href='#SkCanvas_drawText_text'>text</a> draws left to right, positioning the first glyph left side bearing at <a href='#SkCanvas_drawText_x'>x</a>
|
|
and its baseline at <a href='#SkCanvas_drawText_y'>y</a>. <a href='undocumented#Text'>Text</a> size is affected by <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>.
|
|
|
|
All elements of <a href='#SkCanvas_drawText_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawText_text'>text</a>. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawText_text'><code><strong>text</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawText_byteLength'><code><strong>byteLength</strong></code></a></td>
|
|
<td>byte length of <a href='#SkCanvas_drawText_text'>text</a> array</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawText_x'><code><strong>x</strong></code></a></td>
|
|
<td>start of <a href='#SkCanvas_drawText_text'>text</a> on <a href='#SkCanvas_drawText_x'>x</a>-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawText_y'><code><strong>y</strong></code></a></td>
|
|
<td>start of <a href='#SkCanvas_drawText_text'>text</a> on <a href='#SkCanvas_drawText_y'>y</a>-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawText_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawText_text'>text</a> size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="55f5e59350622c5e2834d1c85789f732"><div>The same <a href='#SkCanvas_drawText_text'>text</a> is drawn varying <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a> and varying
|
|
<a href='#Matrix'>Matrix</a>.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawString'>drawString</a><sup><a href='#SkCanvas_drawString_2'>[2]</a></sup> <a href='#SkCanvas_drawPosText'>drawPosText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup> <a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a> <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawString'></a>
|
|
## drawString
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawString'>drawString</a>(const char* string, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
Draws null terminated <a href='#SkCanvas_drawString_string'>string</a>, with origin at (<a href='#SkCanvas_drawString_x'>x</a>, <a href='#SkCanvas_drawString_y'>y</a>), using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and
|
|
<a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawString_paint'>paint</a>.
|
|
|
|
<a href='#SkCanvas_drawString_string'>string</a> meaning depends on <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a>; by default, strings are encoded
|
|
as UTF-8. Other values of <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a> are unlikely to produce the desired
|
|
results, since zero bytes may be embedded in the <a href='#SkCanvas_drawString_string'>string</a>.
|
|
|
|
<a href='#SkCanvas_drawString_x'>x</a> and <a href='#SkCanvas_drawString_y'>y</a> meaning depends on <a href='SkPaint_Reference#Text_Align'>Paint Text Align</a> and <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>; by default
|
|
<a href='#SkCanvas_drawString_string'>string</a> draws left to right, positioning the first glyph left side bearing at <a href='#SkCanvas_drawString_x'>x</a>
|
|
and its baseline at <a href='#SkCanvas_drawString_y'>y</a>. <a href='undocumented#Text'>Text</a> size is affected by <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>.
|
|
|
|
All elements of <a href='#SkCanvas_drawString_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to text. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawString_string'><code><strong>string</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn,
|
|
ending with a char value of zero</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawString_x'><code><strong>x</strong></code></a></td>
|
|
<td>start of <a href='#SkCanvas_drawString_string'>string</a> on <a href='#SkCanvas_drawString_x'>x</a>-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawString_y'><code><strong>y</strong></code></a></td>
|
|
<td>start of <a href='#SkCanvas_drawString_string'>string</a> on <a href='#SkCanvas_drawString_y'>y</a>-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawString_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>text size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="85442cf8d0bce6b5a777853bc36a4dc4"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosText'>drawPosText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup> <a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a> <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawString_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawString'>drawString</a>(const <a href='undocumented#SkString'>SkString</a>& string, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> null terminated <a href='#SkCanvas_drawString_2_string'>string</a>, with origin at (<a href='#SkCanvas_drawString_2_x'>x</a>, <a href='#SkCanvas_drawString_2_y'>y</a>), using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and
|
|
<a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawString_2_paint'>paint</a>.
|
|
|
|
<a href='#SkCanvas_drawString_2_string'>string</a> meaning depends on <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a>; by default, strings are encoded
|
|
as UTF-8. Other values of <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a> are unlikely to produce the desired
|
|
results, since zero bytes may be embedded in the <a href='#SkCanvas_drawString_2_string'>string</a>.
|
|
|
|
<a href='#SkCanvas_drawString_2_x'>x</a> and <a href='#SkCanvas_drawString_2_y'>y</a> meaning depends on <a href='SkPaint_Reference#Text_Align'>Paint Text Align</a> and <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>; by default
|
|
<a href='#SkCanvas_drawString_2_string'>string</a> draws left to right, positioning the first glyph left side bearing at <a href='#SkCanvas_drawString_2_x'>x</a>
|
|
and its baseline at <a href='#SkCanvas_drawString_2_y'>y</a>. <a href='undocumented#Text'>Text</a> size is affected by <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>.
|
|
|
|
All elements of <a href='#SkCanvas_drawString_2_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to text. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawString_2_string'><code><strong>string</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn,
|
|
ending with a char value of zero</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawString_2_x'><code><strong>x</strong></code></a></td>
|
|
<td>start of <a href='#SkCanvas_drawString_2_string'>string</a> on <a href='#SkCanvas_drawString_2_x'>x</a>-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawString_2_y'><code><strong>y</strong></code></a></td>
|
|
<td>start of <a href='#SkCanvas_drawString_2_string'>string</a> on <a href='#SkCanvas_drawString_2_y'>y</a>-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawString_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>text size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="435178c09feb3bfec5e35d983609a013"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosText'>drawPosText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup> <a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a> <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPosText'></a>
|
|
## drawPosText
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPosText'>drawPosText</a>(const void* text, size_t byteLength, const <a href='SkPoint_Reference#SkPoint'>SkPoint</a> pos[], const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> each glyph in <a href='#SkCanvas_drawPosText_text'>text</a> with the origin in <a href='#SkCanvas_drawPosText_pos'>pos</a> array, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and
|
|
<a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPosText_paint'>paint</a>. The number of entries in <a href='#SkCanvas_drawPosText_pos'>pos</a> array must match the number of <a href='undocumented#Glyph'>Glyphs</a>
|
|
described by <a href='#SkCanvas_drawPosText_byteLength'>byteLength</a> of <a href='#SkCanvas_drawPosText_text'>text</a>.
|
|
|
|
<a href='#SkCanvas_drawPosText_text'>text</a> meaning depends on <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a>; by default, <a href='#SkCanvas_drawPosText_text'>text</a> is encoded as
|
|
UTF-8. <a href='#SkCanvas_drawPosText_pos'>pos</a> elements meaning depends on <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>; by default
|
|
glyph left side bearing and baseline are relative to <a href='SkPoint_Reference#Point'>Point</a> in <a href='#SkCanvas_drawPosText_pos'>pos</a> array.
|
|
<a href='undocumented#Text'>Text</a> size is affected by <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>.
|
|
|
|
All elements of <a href='#SkCanvas_drawPosText_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawPosText_text'>text</a>. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
Layout engines such as Harfbuzz typically position each glyph
|
|
rather than using the font advance widths.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPosText_text'><code><strong>text</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPosText_byteLength'><code><strong>byteLength</strong></code></a></td>
|
|
<td>byte length of <a href='#SkCanvas_drawPosText_text'>text</a> array</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPosText_pos'><code><strong>pos</strong></code></a></td>
|
|
<td>array of glyph origins</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPosText_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawPosText_text'>text</a> size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="bf0b2402533a23b6392e0676b7a8414c"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup> <a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a> <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPosTextH'></a>
|
|
## drawPosTextH
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a>(const void* text, size_t byteLength, const <a href='undocumented#SkScalar'>SkScalar</a> xpos[], <a href='undocumented#SkScalar'>SkScalar</a> constY,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> each glyph in <a href='#SkCanvas_drawPosTextH_text'>text</a> with its (x, y) origin composed from <a href='#SkCanvas_drawPosTextH_xpos'>xpos</a> array and
|
|
<a href='#SkCanvas_drawPosTextH_constY'>constY</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPosTextH_paint'>paint</a>. The number of entries in <a href='#SkCanvas_drawPosTextH_xpos'>xpos</a> array
|
|
must match the number of <a href='undocumented#Glyph'>Glyphs</a> described by <a href='#SkCanvas_drawPosTextH_byteLength'>byteLength</a> of <a href='#SkCanvas_drawPosTextH_text'>text</a>.
|
|
|
|
<a href='#SkCanvas_drawPosTextH_text'>text</a> meaning depends on <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a>; by default, <a href='#SkCanvas_drawPosTextH_text'>text</a> is encoded as
|
|
UTF-8. <a href='#SkCanvas_drawPosTextH_xpos'>xpos</a> elements meaning depends on <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>;
|
|
by default each glyph left side bearing is positioned at an <a href='#SkCanvas_drawPosTextH_xpos'>xpos</a> element and
|
|
its baseline is positioned at <a href='#SkCanvas_drawPosTextH_constY'>constY</a>. <a href='undocumented#Text'>Text</a> size is affected by <a href='#Matrix'>Matrix</a> and
|
|
<a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>.
|
|
|
|
All elements of <a href='#SkCanvas_drawPosTextH_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawPosTextH_text'>text</a>. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
Layout engines such as Harfbuzz typically position each glyph
|
|
rather than using the font advance widths if all <a href='undocumented#Glyph'>Glyphs</a> share the same
|
|
baseline.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPosTextH_text'><code><strong>text</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPosTextH_byteLength'><code><strong>byteLength</strong></code></a></td>
|
|
<td>byte length of <a href='#SkCanvas_drawPosTextH_text'>text</a> array</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPosTextH_xpos'><code><strong>xpos</strong></code></a></td>
|
|
<td>array of x-axis positions, used to position each glyph</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPosTextH_constY'><code><strong>constY</strong></code></a></td>
|
|
<td>shared y-axis value for all of x-axis positions</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPosTextH_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawPosTextH_text'>text</a> size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="95c6a7ef82993a8d2add676080e9438a"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosText'>drawPosText</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup> <a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a> <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawTextOnPathHV'></a>
|
|
## drawTextOnPathHV
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawTextOnPathHV'>drawTextOnPathHV</a>(const void* text, size_t byteLength, const <a href='SkPath_Reference#SkPath'>SkPath</a>& path, <a href='undocumented#SkScalar'>SkScalar</a> hOffset,
|
|
<a href='undocumented#SkScalar'>SkScalar</a> vOffset, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> on <a href='SkPath_Reference#Path'>Path</a> <a href='#SkCanvas_drawTextOnPathHV_path'>path</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawTextOnPathHV_paint'>paint</a>.
|
|
|
|
Origin of <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> is at distance <a href='#SkCanvas_drawTextOnPathHV_hOffset'>hOffset</a> along the <a href='#SkCanvas_drawTextOnPathHV_path'>path</a>, offset by a perpendicular
|
|
vector of length <a href='#SkCanvas_drawTextOnPathHV_vOffset'>vOffset</a>. If the <a href='#SkCanvas_drawTextOnPathHV_path'>path</a> section corresponding the glyph advance is
|
|
curved, the glyph is drawn curved to match; control points in the glyph are
|
|
mapped to projected points parallel to the <a href='#SkCanvas_drawTextOnPathHV_path'>path</a>. If the <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> advance is larger
|
|
than the <a href='#SkCanvas_drawTextOnPathHV_path'>path</a> length, the excess <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> is clipped.
|
|
|
|
<a href='#SkCanvas_drawTextOnPathHV_text'>text</a> meaning depends on <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a>; by default, <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> is encoded as
|
|
UTF-8. Origin meaning depends on <a href='SkPaint_Reference#Text_Align'>Paint Text Align</a> and <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>; by
|
|
default <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> positions the first glyph left side bearing and baseline relative
|
|
to origin. <a href='undocumented#Text'>Text</a> size is affected by <a href='#Matrix'>Matrix</a> and <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>.
|
|
|
|
All elements of <a href='#SkCanvas_drawTextOnPathHV_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawTextOnPathHV_text'>text</a>. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawTextOnPathHV_text'><code><strong>text</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPathHV_byteLength'><code><strong>byteLength</strong></code></a></td>
|
|
<td>byte length of <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> array</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPathHV_path'><code><strong>path</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Path'>Path</a> providing <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> baseline</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPathHV_hOffset'><code><strong>hOffset</strong></code></a></td>
|
|
<td>distance along <a href='#SkCanvas_drawTextOnPathHV_path'>path</a> to offset origin</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPathHV_vOffset'><code><strong>vOffset</strong></code></a></td>
|
|
<td>offset of <a href='#SkCanvas_drawTextOnPathHV_text'>text</a> above (if negative) or below (if positive) the <a href='#SkCanvas_drawTextOnPathHV_path'>path</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPathHV_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawTextOnPathHV_text'>text</a> size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="b2f22d1d5041e55d6913aab52f73a7d3"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a> <a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup> <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawTextOnPath'></a>
|
|
## drawTextOnPath
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a>(const void* text, size_t byteLength, const <a href='SkPath_Reference#SkPath'>SkPath</a>& path, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* matrix,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='#SkCanvas_drawTextOnPath_text'>text</a> on <a href='SkPath_Reference#Path'>Path</a> <a href='#SkCanvas_drawTextOnPath_path'>path</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawTextOnPath_paint'>paint</a>.
|
|
|
|
Origin of <a href='#SkCanvas_drawTextOnPath_text'>text</a> is at beginning of <a href='#SkCanvas_drawTextOnPath_path'>path</a> offset by <a href='#SkCanvas_drawTextOnPath_matrix'>matrix</a>, if not nullptr.
|
|
<a href='#SkCanvas_drawTextOnPath_matrix'>matrix</a> transforms <a href='#SkCanvas_drawTextOnPath_text'>text</a> before <a href='#SkCanvas_drawTextOnPath_text'>text</a> is mapped to <a href='#SkCanvas_drawTextOnPath_path'>path</a>. If the <a href='#SkCanvas_drawTextOnPath_path'>path</a> section
|
|
corresponding the glyph advance is curved, the glyph is drawn curved to match;
|
|
control points in the glyph are mapped to projected points parallel to the <a href='#SkCanvas_drawTextOnPath_path'>path</a>.
|
|
If the <a href='#SkCanvas_drawTextOnPath_text'>text</a> advance is larger than the <a href='#SkCanvas_drawTextOnPath_path'>path</a> length, the excess <a href='#SkCanvas_drawTextOnPath_text'>text</a> is clipped.
|
|
|
|
<a href='#SkCanvas_drawTextOnPath_matrix'>matrix</a> does not effect <a href='#SkCanvas_drawTextOnPath_paint'>paint</a> <a href='undocumented#Shader'>Shader</a>.
|
|
|
|
<a href='#SkCanvas_drawTextOnPath_text'>text</a> meaning depends on <a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a>; by default, <a href='#SkCanvas_drawTextOnPath_text'>text</a> is encoded as
|
|
UTF-8. Origin meaning depends on <a href='SkPaint_Reference#Text_Align'>Paint Text Align</a> and <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>; by
|
|
default <a href='#SkCanvas_drawTextOnPath_text'>text</a> positions the first glyph left side bearing and baseline relative
|
|
to origin. <a href='undocumented#Text'>Text</a> size is affected by <a href='#SkCanvas_drawTextOnPath_matrix'>matrix</a> parameter, <a href='#Canvas'>Canvas</a> <a href='#Matrix'>Matrix</a>,
|
|
and <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>.
|
|
|
|
All elements of <a href='#SkCanvas_drawTextOnPath_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawTextOnPath_text'>text</a>. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawTextOnPath_text'><code><strong>text</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPath_byteLength'><code><strong>byteLength</strong></code></a></td>
|
|
<td>byte length of <a href='#SkCanvas_drawTextOnPath_text'>text</a> array</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPath_path'><code><strong>path</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Path'>Path</a> providing <a href='#SkCanvas_drawTextOnPath_text'>text</a> baseline</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPath_matrix'><code><strong>matrix</strong></code></a></td>
|
|
<td>transform of <a href='undocumented#Glyph'>Glyphs</a> before mapping to <a href='#SkCanvas_drawTextOnPath_path'>path</a>; may be nullptr
|
|
to use identity <a href='#Matrix'>Matrix</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextOnPath_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawTextOnPath_text'>text</a> size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="236e680b27960ca22641586dba0599c9"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawTextOnPathHV'>drawTextOnPathHV</a> <a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup> <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawTextRSXform'></a>
|
|
## drawTextRSXform
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawTextRSXform'>drawTextRSXform</a>(const void* text, size_t byteLength, const <a href='undocumented#SkRSXform'>SkRSXform</a> xform[],
|
|
const <a href='SkRect_Reference#SkRect'>SkRect</a>* cullRect, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='#SkCanvas_drawTextRSXform_text'>text</a>, transforming each glyph by the corresponding <a href='undocumented#SkRSXform'>SkRSXform</a>,
|
|
using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawTextRSXform_paint'>paint</a>.
|
|
|
|
<a href='undocumented#RSXform'>RSXform</a> <a href='#SkCanvas_drawTextRSXform_xform'>xform</a> array specifies a separate square scale, rotation, and translation
|
|
for each glyph. <a href='#SkCanvas_drawTextRSXform_xform'>xform</a> does not affect <a href='#SkCanvas_drawTextRSXform_paint'>paint</a> <a href='undocumented#Shader'>Shader</a>.
|
|
|
|
Optional <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawTextRSXform_cullRect'>cullRect</a> is a conservative bounds of <a href='#SkCanvas_drawTextRSXform_text'>text</a>, taking into account
|
|
<a href='undocumented#RSXform'>RSXform</a> and <a href='#SkCanvas_drawTextRSXform_paint'>paint</a>. If <a href='#SkCanvas_drawTextRSXform_cullRect'>cullRect</a> is outside of <a href='#Clip'>Clip</a>, canvas can skip drawing.
|
|
|
|
All elements of <a href='#SkCanvas_drawTextRSXform_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>,
|
|
<a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawTextRSXform_text'>text</a>. By default, draws
|
|
filled 12 point black <a href='undocumented#Glyph'>Glyphs</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawTextRSXform_text'><code><strong>text</strong></code></a></td>
|
|
<td>character code points or <a href='undocumented#Glyph'>Glyphs</a> drawn</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextRSXform_byteLength'><code><strong>byteLength</strong></code></a></td>
|
|
<td>byte length of <a href='#SkCanvas_drawTextRSXform_text'>text</a> array</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextRSXform_xform'><code><strong>xform</strong></code></a></td>
|
|
<td><a href='undocumented#RSXform'>RSXform</a> rotates, scales, and translates each glyph individually</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextRSXform_cullRect'><code><strong>cullRect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> bounds of <a href='#SkCanvas_drawTextRSXform_text'>text</a> for efficient clipping; or nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextRSXform_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='#SkCanvas_drawTextRSXform_text'>text</a> size, blend, color, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="3ce367af833428b08e75d8a22fe67808"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawTextOnPath'>drawTextOnPath</a> <a href='#SkCanvas_drawTextOnPathHV'>drawTextOnPathHV</a> <a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosText'>drawPosText</a> <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a><sup><a href='#SkCanvas_drawTextBlob_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawTextBlob'></a>
|
|
## drawTextBlob
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a>(const <a href='undocumented#SkTextBlob'>SkTextBlob</a>* blob, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Text_Blob'>Text Blob</a> <a href='#SkCanvas_drawTextBlob_blob'>blob</a> at (<a href='#SkCanvas_drawTextBlob_x'>x</a>, <a href='#SkCanvas_drawTextBlob_y'>y</a>), using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawTextBlob_paint'>paint</a>.
|
|
|
|
<a href='#SkCanvas_drawTextBlob_blob'>blob</a> contains <a href='undocumented#Glyph'>Glyphs</a>, their positions, and <a href='#SkCanvas_drawTextBlob_paint'>paint</a> attributes specific to text:
|
|
<a href='undocumented#Typeface'>Typeface</a>, <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>, <a href='SkPaint_Reference#Text_Scale_X'>Paint Text Scale X</a>, <a href='SkPaint_Reference#Text_Skew_X'>Paint Text Skew X</a>,
|
|
<a href='SkPaint_Reference#Text_Align'>Paint Text Align</a>, <a href='SkPaint_Reference#Hinting'>Paint Hinting</a>, <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a>, <a href='SkPaint_Reference#Fake_Bold'>Paint Fake Bold</a>,
|
|
<a href='SkPaint_Reference#Font_Embedded_Bitmaps'>Font Embedded Bitmaps</a>, <a href='SkPaint_Reference#Full_Hinting_Spacing'>Full Hinting Spacing</a>, <a href='SkPaint_Reference#LCD_Text'>LCD Text</a>, <a href='SkPaint_Reference#Linear_Text'>Linear Text</a>,
|
|
<a href='SkPaint_Reference#Subpixel_Text'>Subpixel Text</a>, and <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>.
|
|
|
|
<a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a> must be set to <a href='SkPaint_Reference#SkPaint_kGlyphID_TextEncoding'>SkPaint::kGlyphID TextEncoding</a>.
|
|
|
|
Elements of <a href='#SkCanvas_drawTextBlob_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>, <a href='undocumented#Color_Filter'>Color Filter</a>,
|
|
<a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawTextBlob_blob'>blob</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawTextBlob_blob'><code><strong>blob</strong></code></a></td>
|
|
<td><a href='undocumented#Glyph'>Glyphs</a>, positions, and their paints' text size, typeface, and so on</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextBlob_x'><code><strong>x</strong></code></a></td>
|
|
<td>horizontal offset applied to <a href='#SkCanvas_drawTextBlob_blob'>blob</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextBlob_y'><code><strong>y</strong></code></a></td>
|
|
<td>vertical offset applied to <a href='#SkCanvas_drawTextBlob_blob'>blob</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextBlob_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>blend, color, stroking, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="5f823814ec9df1f912a2ea943bedfca1"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosText'>drawPosText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawTextBlob_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='undocumented#SkTextBlob'>SkTextBlob</a>>& blob, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Text_Blob'>Text Blob</a> <a href='#SkCanvas_drawTextBlob_2_blob'>blob</a> at (<a href='#SkCanvas_drawTextBlob_2_x'>x</a>, <a href='#SkCanvas_drawTextBlob_2_y'>y</a>), using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawTextBlob_2_paint'>paint</a>.
|
|
|
|
<a href='#SkCanvas_drawTextBlob_2_blob'>blob</a> contains <a href='undocumented#Glyph'>Glyphs</a>, their positions, and <a href='#SkCanvas_drawTextBlob_2_paint'>paint</a> attributes specific to text:
|
|
<a href='undocumented#Typeface'>Typeface</a>, <a href='SkPaint_Reference#Text_Size'>Paint Text Size</a>, <a href='SkPaint_Reference#Text_Scale_X'>Paint Text Scale X</a>, <a href='SkPaint_Reference#Text_Skew_X'>Paint Text Skew X</a>,
|
|
<a href='SkPaint_Reference#Text_Align'>Paint Text Align</a>, <a href='SkPaint_Reference#Hinting'>Paint Hinting</a>, <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a>, <a href='SkPaint_Reference#Fake_Bold'>Paint Fake Bold</a>,
|
|
<a href='SkPaint_Reference#Font_Embedded_Bitmaps'>Font Embedded Bitmaps</a>, <a href='SkPaint_Reference#Full_Hinting_Spacing'>Full Hinting Spacing</a>, <a href='SkPaint_Reference#LCD_Text'>LCD Text</a>, <a href='SkPaint_Reference#Linear_Text'>Linear Text</a>,
|
|
<a href='SkPaint_Reference#Subpixel_Text'>Subpixel Text</a>, and <a href='SkPaint_Reference#Vertical_Text'>Paint Vertical Text</a>.
|
|
|
|
<a href='SkPaint_Reference#Text_Encoding'>Paint Text Encoding</a> must be set to <a href='SkPaint_Reference#SkPaint_kGlyphID_TextEncoding'>SkPaint::kGlyphID TextEncoding</a>.
|
|
|
|
Elements of <a href='#SkCanvas_drawTextBlob_2_paint'>paint</a>: <a href='undocumented#Path_Effect'>Path Effect</a>, <a href='undocumented#Mask_Filter'>Mask Filter</a>, <a href='undocumented#Shader'>Shader</a>, <a href='undocumented#Color_Filter'>Color Filter</a>,
|
|
<a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='undocumented#Draw_Looper'>Draw Looper</a>; apply to <a href='#SkCanvas_drawTextBlob_2_blob'>blob</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawTextBlob_2_blob'><code><strong>blob</strong></code></a></td>
|
|
<td><a href='undocumented#Glyph'>Glyphs</a>, positions, and their paints' text size, typeface, and so on</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextBlob_2_x'><code><strong>x</strong></code></a></td>
|
|
<td>horizontal offset applied to <a href='#SkCanvas_drawTextBlob_2_blob'>blob</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextBlob_2_y'><code><strong>y</strong></code></a></td>
|
|
<td>vertical offset applied to <a href='#SkCanvas_drawTextBlob_2_blob'>blob</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawTextBlob_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>blend, color, stroking, and so on, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="af4c69fbbd165c8b0eb0c9bd49ccbd8d"><div><a href='SkPaint_Reference#Paint'>Paint</a> attributes unrelated to text, like color, have no effect on <a href='#SkCanvas_drawTextBlob_2_paint'>paint</a> in allocated <a href='undocumented#Text_Blob'>Text Blob</a>.
|
|
<a href='SkPaint_Reference#Paint'>Paint</a> attributes related to text, like text size, have no effect on <a href='#SkCanvas_drawTextBlob_2_paint'>paint</a> passed to <a href='#SkCanvas_drawTextBlob'>drawTextBlob</a>.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawText'>drawText</a> <a href='#SkCanvas_drawPosText'>drawPosText</a> <a href='#SkCanvas_drawPosTextH'>drawPosTextH</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPicture'></a>
|
|
## drawPicture
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPicture'>drawPicture</a>(const <a href='SkPicture_Reference#SkPicture'>SkPicture</a>* picture)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkPicture_Reference#Picture'>Picture</a> <a href='#SkCanvas_drawPicture_picture'>picture</a>, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>.
|
|
<a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a> are unchanged by <a href='#SkCanvas_drawPicture_picture'>picture</a> contents, as if
|
|
<a href='#SkCanvas_save'>save</a> was called before and <a href='#SkCanvas_restore'>restore</a> was called after <a href='#SkCanvas_drawPicture'>drawPicture</a>.
|
|
|
|
<a href='SkPicture_Reference#Picture'>Picture</a> records a series of draw commands for later playback.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPicture_picture'><code><strong>picture</strong></code></a></td>
|
|
<td>recorded drawing commands to play</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="83918a23fcffd47f59a1ef662c85a24c"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawDrawable'>drawDrawable</a><sup><a href='#SkCanvas_drawDrawable_2'>[2]</a></sup> <a href='SkPicture_Reference#SkPicture'>SkPicture</a> <a href='SkPicture_Reference#SkPicture_playback'>SkPicture::playback</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPicture_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPicture'>drawPicture</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkPicture_Reference#SkPicture'>SkPicture</a>>& picture)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkPicture_Reference#Picture'>Picture</a> <a href='#SkCanvas_drawPicture_2_picture'>picture</a>, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>.
|
|
<a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a> are unchanged by <a href='#SkCanvas_drawPicture_2_picture'>picture</a> contents, as if
|
|
<a href='#SkCanvas_save'>save</a> was called before and <a href='#SkCanvas_restore'>restore</a> was called after <a href='#SkCanvas_drawPicture'>drawPicture</a>.
|
|
|
|
<a href='SkPicture_Reference#Picture'>Picture</a> records a series of draw commands for later playback.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPicture_2_picture'><code><strong>picture</strong></code></a></td>
|
|
<td>recorded drawing commands to play</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="83918a23fcffd47f59a1ef662c85a24c"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawDrawable'>drawDrawable</a><sup><a href='#SkCanvas_drawDrawable_2'>[2]</a></sup> <a href='SkPicture_Reference#SkPicture'>SkPicture</a> <a href='SkPicture_Reference#SkPicture_playback'>SkPicture::playback</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPicture_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPicture'>drawPicture</a>(const <a href='SkPicture_Reference#SkPicture'>SkPicture</a>* picture, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* matrix, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkPicture_Reference#Picture'>Picture</a> <a href='#SkCanvas_drawPicture_3_picture'>picture</a>, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>; transforming <a href='#SkCanvas_drawPicture_3_picture'>picture</a> with
|
|
<a href='#Matrix'>Matrix</a> <a href='#SkCanvas_drawPicture_3_matrix'>matrix</a>, if provided; and use <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPicture_3_paint'>paint</a> <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>,
|
|
<a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, if provided.
|
|
|
|
<a href='#SkCanvas_drawPicture_3_matrix'>matrix</a> transformation is equivalent to: <a href='#SkCanvas_save'>save</a>, <a href='#SkCanvas_concat'>concat</a>, <a href='#SkCanvas_drawPicture'>drawPicture</a>, <a href='#SkCanvas_restore'>restore</a>.
|
|
<a href='#SkCanvas_drawPicture_3_paint'>paint</a> use is equivalent to: <a href='#SkCanvas_saveLayer'>saveLayer</a>, <a href='#SkCanvas_drawPicture'>drawPicture</a>, <a href='#SkCanvas_restore'>restore</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPicture_3_picture'><code><strong>picture</strong></code></a></td>
|
|
<td>recorded drawing commands to play</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPicture_3_matrix'><code><strong>matrix</strong></code></a></td>
|
|
<td><a href='#Matrix'>Matrix</a> to rotate, scale, translate, and so on; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPicture_3_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> to apply transparency, filtering, and so on; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="759e4e5bac680838added8f70884dcdc"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawDrawable'>drawDrawable</a><sup><a href='#SkCanvas_drawDrawable_2'>[2]</a></sup> <a href='SkPicture_Reference#SkPicture'>SkPicture</a> <a href='SkPicture_Reference#SkPicture_playback'>SkPicture::playback</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPicture_4'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPicture'>drawPicture</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkPicture_Reference#SkPicture'>SkPicture</a>>& picture, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* matrix, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='SkPicture_Reference#Picture'>Picture</a> <a href='#SkCanvas_drawPicture_4_picture'>picture</a>, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>; transforming <a href='#SkCanvas_drawPicture_4_picture'>picture</a> with
|
|
<a href='#Matrix'>Matrix</a> <a href='#SkCanvas_drawPicture_4_matrix'>matrix</a>, if provided; and use <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawPicture_4_paint'>paint</a> <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>,
|
|
<a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, if provided.
|
|
|
|
<a href='#SkCanvas_drawPicture_4_matrix'>matrix</a> transformation is equivalent to: <a href='#SkCanvas_save'>save</a>, <a href='#SkCanvas_concat'>concat</a>, <a href='#SkCanvas_drawPicture'>drawPicture</a>, <a href='#SkCanvas_restore'>restore</a>.
|
|
<a href='#SkCanvas_drawPicture_4_paint'>paint</a> use is equivalent to: <a href='#SkCanvas_saveLayer'>saveLayer</a>, <a href='#SkCanvas_drawPicture'>drawPicture</a>, <a href='#SkCanvas_restore'>restore</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPicture_4_picture'><code><strong>picture</strong></code></a></td>
|
|
<td>recorded drawing commands to play</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPicture_4_matrix'><code><strong>matrix</strong></code></a></td>
|
|
<td><a href='#Matrix'>Matrix</a> to rotate, scale, translate, and so on; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPicture_4_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='SkPaint_Reference#Paint'>Paint</a> to apply transparency, filtering, and so on; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="c4ff59439dd2fc871925d4eeb0c84ca1"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawDrawable'>drawDrawable</a><sup><a href='#SkCanvas_drawDrawable_2'>[2]</a></sup> <a href='SkPicture_Reference#SkPicture'>SkPicture</a> <a href='SkPicture_Reference#SkPicture_playback'>SkPicture::playback</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawVertices'></a>
|
|
## drawVertices
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawVertices'>drawVertices</a>(const <a href='undocumented#SkVertices'>SkVertices</a>* vertices, <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Vertices'>Vertices</a> <a href='#SkCanvas_drawVertices_vertices'>vertices</a>, a triangle mesh, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>.
|
|
If <a href='undocumented#Texs'>Vertices Texs</a> and <a href='undocumented#Colors'>Vertices Colors</a> are defined in <a href='#SkCanvas_drawVertices_vertices'>vertices</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawVertices_paint'>paint</a>
|
|
contains <a href='undocumented#Shader'>Shader</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> <a href='#SkCanvas_drawVertices_mode'>mode</a> combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawVertices_vertices'><code><strong>vertices</strong></code></a></td>
|
|
<td>triangle mesh to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_mode'><code><strong>mode</strong></code></a></td>
|
|
<td>combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>, if both are present</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>specifies the <a href='undocumented#Shader'>Shader</a>, used as <a href='undocumented#Vertices'>Vertices</a> texture; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="f48b22eaad1bb7adcc3faaa321754af6"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPatch'>drawPatch</a><sup><a href='#SkCanvas_drawPatch_2'>[2]</a></sup> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawVertices_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawVertices'>drawVertices</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='undocumented#SkVertices'>SkVertices</a>>& vertices, <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Vertices'>Vertices</a> <a href='#SkCanvas_drawVertices_2_vertices'>vertices</a>, a triangle mesh, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>.
|
|
If <a href='undocumented#Texs'>Vertices Texs</a> and <a href='undocumented#Colors'>Vertices Colors</a> are defined in <a href='#SkCanvas_drawVertices_2_vertices'>vertices</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawVertices_2_paint'>paint</a>
|
|
contains <a href='undocumented#Shader'>Shader</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> <a href='#SkCanvas_drawVertices_2_mode'>mode</a> combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawVertices_2_vertices'><code><strong>vertices</strong></code></a></td>
|
|
<td>triangle mesh to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_2_mode'><code><strong>mode</strong></code></a></td>
|
|
<td>combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>, if both are present</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>specifies the <a href='undocumented#Shader'>Shader</a>, used as <a href='undocumented#Vertices'>Vertices</a> texture, may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e8bdae9bea3227758989028424fcac3d"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPatch'>drawPatch</a><sup><a href='#SkCanvas_drawPatch_2'>[2]</a></sup> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawVertices_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawVertices'>drawVertices</a>(const <a href='undocumented#SkVertices'>SkVertices</a>* vertices, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* bones, int boneCount, <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Vertices'>Vertices</a> <a href='#SkCanvas_drawVertices_3_vertices'>vertices</a>, a triangle mesh, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>. Bone data is used to
|
|
deform <a href='#SkCanvas_drawVertices_3_vertices'>vertices</a> with bone weights.
|
|
If <a href='undocumented#Texs'>Vertices Texs</a> and <a href='undocumented#Colors'>Vertices Colors</a> are defined in <a href='#SkCanvas_drawVertices_3_vertices'>vertices</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawVertices_3_paint'>paint</a>
|
|
contains <a href='undocumented#Shader'>Shader</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> <a href='#SkCanvas_drawVertices_3_mode'>mode</a> combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>.
|
|
The first element of <a href='#SkCanvas_drawVertices_3_bones'>bones</a> should be an object to world space transformation matrix that
|
|
will be applied before performing mesh deformations. If no such transformation is needed,
|
|
it should be the identity matrix.
|
|
<a href='#SkCanvas_drawVertices_3_boneCount'>boneCount</a> must be at most 100, and thus the size of <a href='#SkCanvas_drawVertices_3_bones'>bones</a> should be at most 100.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawVertices_3_vertices'><code><strong>vertices</strong></code></a></td>
|
|
<td>triangle mesh to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_3_bones'><code><strong>bones</strong></code></a></td>
|
|
<td>bone matrix data</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_3_boneCount'><code><strong>boneCount</strong></code></a></td>
|
|
<td>number of bone matrices</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_3_mode'><code><strong>mode</strong></code></a></td>
|
|
<td>combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>, if both are present</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_3_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>specifies the <a href='undocumented#Shader'>Shader</a>, used as <a href='undocumented#Vertices'>Vertices</a> texture, may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7db6ad6b01931d713d7390736239001b"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPatch'>drawPatch</a><sup><a href='#SkCanvas_drawPatch_2'>[2]</a></sup> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawVertices_4'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawVertices'>drawVertices</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='undocumented#SkVertices'>SkVertices</a>>& vertices, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* bones, int boneCount,
|
|
<a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Vertices'>Vertices</a> <a href='#SkCanvas_drawVertices_4_vertices'>vertices</a>, a triangle mesh, using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>. Bone data is used to
|
|
deform <a href='#SkCanvas_drawVertices_4_vertices'>vertices</a> with bone weights.
|
|
If <a href='undocumented#Texs'>Vertices Texs</a> and <a href='undocumented#Colors'>Vertices Colors</a> are defined in <a href='#SkCanvas_drawVertices_4_vertices'>vertices</a>, and <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawVertices_4_paint'>paint</a>
|
|
contains <a href='undocumented#Shader'>Shader</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> <a href='#SkCanvas_drawVertices_4_mode'>mode</a> combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>.
|
|
The first element of <a href='#SkCanvas_drawVertices_4_bones'>bones</a> should be an object to world space transformation matrix that
|
|
will be applied before performing mesh deformations. If no such transformation is needed,
|
|
it should be the identity matrix.
|
|
<a href='#SkCanvas_drawVertices_4_boneCount'>boneCount</a> must be at most 100, and thus the size of <a href='#SkCanvas_drawVertices_4_bones'>bones</a> should be at most 100.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawVertices_4_vertices'><code><strong>vertices</strong></code></a></td>
|
|
<td>triangle mesh to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_4_bones'><code><strong>bones</strong></code></a></td>
|
|
<td>bone matrix data</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_4_boneCount'><code><strong>boneCount</strong></code></a></td>
|
|
<td>number of bone matrices</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_4_mode'><code><strong>mode</strong></code></a></td>
|
|
<td>combines <a href='undocumented#Colors'>Vertices Colors</a> with <a href='undocumented#Shader'>Shader</a>, if both are present</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawVertices_4_paint'><code><strong>paint</strong></code></a></td>
|
|
<td>specifies the <a href='undocumented#Shader'>Shader</a>, used as <a href='undocumented#Vertices'>Vertices</a> texture, may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="cc1fc7f3462abc79ec6dec3405e2812d"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawPatch'>drawPatch</a><sup><a href='#SkCanvas_drawPatch_2'>[2]</a></sup> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPatch'></a>
|
|
## drawPatch
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPatch'>drawPatch</a>(const <a href='SkPoint_Reference#SkPoint'>SkPoint</a> cubics[12], const <a href='SkColor_Reference#SkColor'>SkColor</a> colors[4], const <a href='SkPoint_Reference#SkPoint'>SkPoint</a> texCoords[4],
|
|
<a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
Draws a <a href='undocumented#Coons_Patch'>Coons Patch</a>: the interpolation of four <a href='#SkCanvas_drawPatch_cubics'>cubics</a> with shared corners,
|
|
associating a color, and optionally a texture <a href='SkPoint_Reference#Point'>Point</a>, with each corner.
|
|
|
|
<a href='undocumented#Coons_Patch'>Coons Patch</a> uses <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>, <a href='#SkCanvas_drawPatch_paint'>paint</a> <a href='undocumented#Shader'>Shader</a>, <a href='undocumented#Color_Filter'>Color Filter</a>,
|
|
<a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>. If <a href='undocumented#Shader'>Shader</a> is provided it is treated
|
|
as <a href='undocumented#Coons_Patch'>Coons Patch</a> texture; <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> <a href='#SkCanvas_drawPatch_mode'>mode</a> combines <a href='SkColor_Reference#Color'>Color</a> <a href='#SkCanvas_drawPatch_colors'>colors</a> and <a href='undocumented#Shader'>Shader</a> if
|
|
both are provided.
|
|
|
|
<a href='SkPoint_Reference#Point'>Point</a> array <a href='#SkCanvas_drawPatch_cubics'>cubics</a> specifies four <a href='SkPath_Reference#Cubic'>Cubics</a> starting at the top-left corner,
|
|
in clockwise order, sharing every fourth point. The last <a href='SkPath_Reference#Cubic'>Cubic</a> ends at the
|
|
first point.
|
|
|
|
<a href='SkColor_Reference#Color'>Color</a> array color associates <a href='#SkCanvas_drawPatch_colors'>colors</a> with corners in top-left, top-right,
|
|
bottom-right, bottom-left order.
|
|
|
|
If <a href='#SkCanvas_drawPatch_paint'>paint</a> contains <a href='undocumented#Shader'>Shader</a>, <a href='SkPoint_Reference#Point'>Point</a> array <a href='#SkCanvas_drawPatch_texCoords'>texCoords</a> maps <a href='undocumented#Shader'>Shader</a> as texture to
|
|
corners in top-left, top-right, bottom-right, bottom-left order.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPatch_cubics'><code><strong>cubics</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Cubic'>Path Cubic</a> array, sharing common points</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPatch_colors'><code><strong>colors</strong></code></a></td>
|
|
<td><a href='SkColor_Reference#Color'>Color</a> array, one for each corner</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPatch_texCoords'><code><strong>texCoords</strong></code></a></td>
|
|
<td><a href='SkPoint_Reference#Point'>Point</a> array of texture coordinates, mapping <a href='undocumented#Shader'>Shader</a> to corners;
|
|
may be nullptr</td>
|
|
</tr>
|
|
# <tr> <td><a name='SkCanvas_drawPatch_mode'><code><strong>mode</strong></code></a></td>
|
|
<td><a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> for <a href='#SkCanvas_drawPatch_colors'>colors</a>, and for <a href='undocumented#Shader'>Shader</a> if <a href='#SkCanvas_drawPatch_paint'>paint</a> has one</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPatch_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='undocumented#Shader'>Shader</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="accb545d67984ced168f5be6ab824795"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
SeeAlso <a href='#SkCanvas_drawVertices'>drawVertices</a><sup><a href='#SkCanvas_drawVertices_2'>[2]</a></sup><sup><a href='#SkCanvas_drawVertices_3'>[3]</a></sup><sup><a href='#SkCanvas_drawVertices_4'>[4]</a></sup> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawPatch_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawPatch'>drawPatch</a>(const <a href='SkPoint_Reference#SkPoint'>SkPoint</a> cubics[12], const <a href='SkColor_Reference#SkColor'>SkColor</a> colors[4], const <a href='SkPoint_Reference#SkPoint'>SkPoint</a> texCoords[4],
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>& paint)
|
|
</pre>
|
|
|
|
Draws <a href='SkPath_Reference#Cubic'>Cubic</a> <a href='undocumented#Coons_Patch'>Coons Patch</a>: the interpolation of four <a href='#SkCanvas_drawPatch_2_cubics'>cubics</a> with shared corners,
|
|
associating a color, and optionally a texture <a href='SkPoint_Reference#Point'>Point</a>, with each corner.
|
|
|
|
<a href='undocumented#Coons_Patch'>Coons Patch</a> uses <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>, <a href='#SkCanvas_drawPatch_2_paint'>paint</a> <a href='undocumented#Shader'>Shader</a>, <a href='undocumented#Color_Filter'>Color Filter</a>,
|
|
<a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>. If <a href='undocumented#Shader'>Shader</a> is provided it is treated
|
|
as <a href='undocumented#Coons_Patch'>Coons Patch</a> texture; <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> mode combines <a href='SkColor_Reference#Color'>Color</a> <a href='#SkCanvas_drawPatch_2_colors'>colors</a> and <a href='undocumented#Shader'>Shader</a> if
|
|
both are provided.
|
|
|
|
<a href='SkPoint_Reference#Point'>Point</a> array <a href='#SkCanvas_drawPatch_2_cubics'>cubics</a> specifies four <a href='SkPath_Reference#Cubic'>Cubics</a> starting at the top-left corner,
|
|
in clockwise order, sharing every fourth point. The last <a href='SkPath_Reference#Cubic'>Cubic</a> ends at the
|
|
first point.
|
|
|
|
<a href='SkColor_Reference#Color'>Color</a> array color associates <a href='#SkCanvas_drawPatch_2_colors'>colors</a> with corners in top-left, top-right,
|
|
bottom-right, bottom-left order.
|
|
|
|
If <a href='#SkCanvas_drawPatch_2_paint'>paint</a> contains <a href='undocumented#Shader'>Shader</a>, <a href='SkPoint_Reference#Point'>Point</a> array <a href='#SkCanvas_drawPatch_2_texCoords'>texCoords</a> maps <a href='undocumented#Shader'>Shader</a> as texture to
|
|
corners in top-left, top-right, bottom-right, bottom-left order.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawPatch_2_cubics'><code><strong>cubics</strong></code></a></td>
|
|
<td><a href='SkPath_Reference#Cubic'>Path Cubic</a> array, sharing common points</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPatch_2_colors'><code><strong>colors</strong></code></a></td>
|
|
<td><a href='SkColor_Reference#Color'>Color</a> array, one for each corner</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawPatch_2_texCoords'><code><strong>texCoords</strong></code></a></td>
|
|
<td><a href='SkPoint_Reference#Point'>Point</a> array of texture coordinates, mapping <a href='undocumented#Shader'>Shader</a> to corners;
|
|
may be nullptr</td>
|
|
</tr>
|
|
# <tr> <td><a name='SkCanvas_drawPatch_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='undocumented#Shader'>Shader</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, used to draw</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4cf70f8d194867d053d7e177e5088445"></fiddle-embed></div>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="3412c2a16cb529af0e04878d264451f2"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
SeeAlso <a href='#SkCanvas_drawVertices'>drawVertices</a><sup><a href='#SkCanvas_drawVertices_2'>[2]</a></sup><sup><a href='#SkCanvas_drawVertices_3'>[3]</a></sup><sup><a href='#SkCanvas_drawVertices_4'>[4]</a></sup> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawAtlas'></a>
|
|
## drawAtlas
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawAtlas'>drawAtlas</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* atlas, const <a href='undocumented#SkRSXform'>SkRSXform</a> xform[], const <a href='SkRect_Reference#SkRect'>SkRect</a> tex[],
|
|
const <a href='SkColor_Reference#SkColor'>SkColor</a> colors[], int count, <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode, const <a href='SkRect_Reference#SkRect'>SkRect</a>* cullRect,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> a set of sprites from <a href='#SkCanvas_drawAtlas_atlas'>atlas</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawAtlas_paint'>paint</a>.
|
|
<a href='#SkCanvas_drawAtlas_paint'>paint</a> uses <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>
|
|
to draw, if present. For each entry in the array, <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawAtlas_tex'>tex</a> locates sprite in
|
|
<a href='#SkCanvas_drawAtlas_atlas'>atlas</a>, and <a href='undocumented#RSXform'>RSXform</a> <a href='#SkCanvas_drawAtlas_xform'>xform</a> transforms it into destination space.
|
|
|
|
<a href='#SkCanvas_drawAtlas_xform'>xform</a>, text, and <a href='#SkCanvas_drawAtlas_colors'>colors</a> if present, must contain <a href='#SkCanvas_drawAtlas_count'>count</a> entries.
|
|
Optional <a href='#SkCanvas_drawAtlas_colors'>colors</a> are applied for each sprite using <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> <a href='#SkCanvas_drawAtlas_mode'>mode</a>, treating
|
|
sprite as source and <a href='#SkCanvas_drawAtlas_colors'>colors</a> as destination.
|
|
Optional <a href='#SkCanvas_drawAtlas_cullRect'>cullRect</a> is a conservative bounds of all transformed sprites.
|
|
If <a href='#SkCanvas_drawAtlas_cullRect'>cullRect</a> is outside of <a href='#Clip'>Clip</a>, canvas can skip drawing.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawAtlas_atlas'><code><strong>atlas</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing sprites</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_xform'><code><strong>xform</strong></code></a></td>
|
|
<td><a href='undocumented#RSXform'>RSXform</a> mappings for sprites in <a href='#SkCanvas_drawAtlas_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_tex'><code><strong>tex</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> locations of sprites in <a href='#SkCanvas_drawAtlas_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_colors'><code><strong>colors</strong></code></a></td>
|
|
<td>one per sprite, blended with sprite using <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_count'><code><strong>count</strong></code></a></td>
|
|
<td>number of sprites to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_mode'><code><strong>mode</strong></code></a></td>
|
|
<td><a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> combining <a href='#SkCanvas_drawAtlas_colors'>colors</a> and sprites</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_cullRect'><code><strong>cullRect</strong></code></a></td>
|
|
<td>bounds of transformed sprites for efficient clipping; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and so on; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1df575f9b8132306ce0552a2554ed132"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawAtlas_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawAtlas'>drawAtlas</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkImage_Reference#SkImage'>SkImage</a>>& atlas, const <a href='undocumented#SkRSXform'>SkRSXform</a> xform[], const <a href='SkRect_Reference#SkRect'>SkRect</a> tex[],
|
|
const <a href='SkColor_Reference#SkColor'>SkColor</a> colors[], int count, <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode, const <a href='SkRect_Reference#SkRect'>SkRect</a>* cullRect,
|
|
const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> a set of sprites from <a href='#SkCanvas_drawAtlas_2_atlas'>atlas</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawAtlas_2_paint'>paint</a>.
|
|
<a href='#SkCanvas_drawAtlas_2_paint'>paint</a> uses <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>
|
|
to draw, if present. For each entry in the array, <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawAtlas_2_tex'>tex</a> locates sprite in
|
|
<a href='#SkCanvas_drawAtlas_2_atlas'>atlas</a>, and <a href='undocumented#RSXform'>RSXform</a> <a href='#SkCanvas_drawAtlas_2_xform'>xform</a> transforms it into destination space.
|
|
|
|
<a href='#SkCanvas_drawAtlas_2_xform'>xform</a>, text, and <a href='#SkCanvas_drawAtlas_2_colors'>colors</a> if present, must contain <a href='#SkCanvas_drawAtlas_2_count'>count</a> entries.
|
|
Optional <a href='#SkCanvas_drawAtlas_2_colors'>colors</a> is applied for each sprite using <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>.
|
|
Optional <a href='#SkCanvas_drawAtlas_2_cullRect'>cullRect</a> is a conservative bounds of all transformed sprites.
|
|
If <a href='#SkCanvas_drawAtlas_2_cullRect'>cullRect</a> is outside of <a href='#Clip'>Clip</a>, canvas can skip drawing.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawAtlas_2_atlas'><code><strong>atlas</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing sprites</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_2_xform'><code><strong>xform</strong></code></a></td>
|
|
<td><a href='undocumented#RSXform'>RSXform</a> mappings for sprites in <a href='#SkCanvas_drawAtlas_2_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_2_tex'><code><strong>tex</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> locations of sprites in <a href='#SkCanvas_drawAtlas_2_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_2_colors'><code><strong>colors</strong></code></a></td>
|
|
<td>one per sprite, blended with sprite using <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_2_count'><code><strong>count</strong></code></a></td>
|
|
<td>number of sprites to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_2_mode'><code><strong>mode</strong></code></a></td>
|
|
<td><a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a> combining <a href='#SkCanvas_drawAtlas_2_colors'>colors</a> and sprites</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_2_cullRect'><code><strong>cullRect</strong></code></a></td>
|
|
<td>bounds of transformed sprites for efficient clipping; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_2_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and so on; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="0e66a8f230a8d531bcef9f5ebdc5aac1"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawAtlas_3'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawAtlas'>drawAtlas</a>(const <a href='SkImage_Reference#SkImage'>SkImage</a>* atlas, const <a href='undocumented#SkRSXform'>SkRSXform</a> xform[], const <a href='SkRect_Reference#SkRect'>SkRect</a> tex[], int count,
|
|
const <a href='SkRect_Reference#SkRect'>SkRect</a>* cullRect, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> a set of sprites from <a href='#SkCanvas_drawAtlas_3_atlas'>atlas</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawAtlas_3_paint'>paint</a>.
|
|
<a href='#SkCanvas_drawAtlas_3_paint'>paint</a> uses <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>
|
|
to draw, if present. For each entry in the array, <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawAtlas_3_tex'>tex</a> locates sprite in
|
|
<a href='#SkCanvas_drawAtlas_3_atlas'>atlas</a>, and <a href='undocumented#RSXform'>RSXform</a> <a href='#SkCanvas_drawAtlas_3_xform'>xform</a> transforms it into destination space.
|
|
|
|
<a href='#SkCanvas_drawAtlas_3_xform'>xform</a> and text must contain <a href='#SkCanvas_drawAtlas_3_count'>count</a> entries.
|
|
Optional <a href='#SkCanvas_drawAtlas_3_cullRect'>cullRect</a> is a conservative bounds of all transformed sprites.
|
|
If <a href='#SkCanvas_drawAtlas_3_cullRect'>cullRect</a> is outside of <a href='#Clip'>Clip</a>, canvas can skip drawing.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawAtlas_3_atlas'><code><strong>atlas</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing sprites</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_3_xform'><code><strong>xform</strong></code></a></td>
|
|
<td><a href='undocumented#RSXform'>RSXform</a> mappings for sprites in <a href='#SkCanvas_drawAtlas_3_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_3_tex'><code><strong>tex</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> locations of sprites in <a href='#SkCanvas_drawAtlas_3_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_3_count'><code><strong>count</strong></code></a></td>
|
|
<td>number of sprites to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_3_cullRect'><code><strong>cullRect</strong></code></a></td>
|
|
<td>bounds of transformed sprites for efficient clipping; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_3_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and so on; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8dc0d0fdeab20bbc21cac6874ddbefcd"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawAtlas_4'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawAtlas'>drawAtlas</a>(const <a href='undocumented#sk_sp'>sk sp</a><<a href='SkImage_Reference#SkImage'>SkImage</a>>& atlas, const <a href='undocumented#SkRSXform'>SkRSXform</a> xform[], const <a href='SkRect_Reference#SkRect'>SkRect</a> tex[], int count,
|
|
const <a href='SkRect_Reference#SkRect'>SkRect</a>* cullRect, const <a href='SkPaint_Reference#SkPaint'>SkPaint</a>* paint)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> a set of sprites from <a href='#SkCanvas_drawAtlas_4_atlas'>atlas</a>, using <a href='#Clip'>Clip</a>, <a href='#Matrix'>Matrix</a>, and optional <a href='SkPaint_Reference#Paint'>Paint</a> <a href='#SkCanvas_drawAtlas_4_paint'>paint</a>.
|
|
<a href='#SkCanvas_drawAtlas_4_paint'>paint</a> uses <a href='SkPaint_Reference#Anti_Alias'>Anti Alias</a>, <a href='SkColor_Reference#Alpha'>Color Alpha</a>, <a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, and <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>
|
|
to draw, if present. For each entry in the array, <a href='SkRect_Reference#Rect'>Rect</a> <a href='#SkCanvas_drawAtlas_4_tex'>tex</a> locates sprite in
|
|
<a href='#SkCanvas_drawAtlas_4_atlas'>atlas</a>, and <a href='undocumented#RSXform'>RSXform</a> <a href='#SkCanvas_drawAtlas_4_xform'>xform</a> transforms it into destination space.
|
|
|
|
<a href='#SkCanvas_drawAtlas_4_xform'>xform</a> and text must contain <a href='#SkCanvas_drawAtlas_4_count'>count</a> entries.
|
|
Optional <a href='#SkCanvas_drawAtlas_4_cullRect'>cullRect</a> is a conservative bounds of all transformed sprites.
|
|
If <a href='#SkCanvas_drawAtlas_4_cullRect'>cullRect</a> is outside of <a href='#Clip'>Clip</a>, canvas can skip drawing.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawAtlas_4_atlas'><code><strong>atlas</strong></code></a></td>
|
|
<td><a href='SkImage_Reference#Image'>Image</a> containing sprites</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_4_xform'><code><strong>xform</strong></code></a></td>
|
|
<td><a href='undocumented#RSXform'>RSXform</a> mappings for sprites in <a href='#SkCanvas_drawAtlas_4_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_4_tex'><code><strong>tex</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> locations of sprites in <a href='#SkCanvas_drawAtlas_4_atlas'>atlas</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_4_count'><code><strong>count</strong></code></a></td>
|
|
<td>number of sprites to draw</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_4_cullRect'><code><strong>cullRect</strong></code></a></td>
|
|
<td>bounds of transformed sprites for efficient clipping; may be nullptr</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAtlas_4_paint'><code><strong>paint</strong></code></a></td>
|
|
<td><a href='undocumented#Color_Filter'>Color Filter</a>, <a href='undocumented#Image_Filter'>Image Filter</a>, <a href='SkBlendMode_Reference#Blend_Mode'>Blend Mode</a>, and so on; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="c093c2b14bd3e6171ede7cd4049d9b57"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_drawBitmap'>drawBitmap</a> <a href='#SkCanvas_drawImage'>drawImage</a><sup><a href='#SkCanvas_drawImage_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawDrawable'></a>
|
|
## drawDrawable
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawDrawable'>drawDrawable</a>(<a href='undocumented#SkDrawable'>SkDrawable</a>* drawable, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* matrix = nullptr)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Drawable'>Drawable</a> <a href='#SkCanvas_drawDrawable_drawable'>drawable</a> using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>, concatenated with
|
|
optional <a href='#SkCanvas_drawDrawable_matrix'>matrix</a>.
|
|
|
|
If <a href='#Canvas'>Canvas</a> has an asynchronous implementation, as is the case
|
|
when it is recording into <a href='SkPicture_Reference#Picture'>Picture</a>, then <a href='#SkCanvas_drawDrawable_drawable'>drawable</a> will be referenced,
|
|
so that <a href='undocumented#SkDrawable_draw'>SkDrawable::draw()</a> can be called when the operation is finalized. To force
|
|
immediate drawing, call <a href='undocumented#SkDrawable_draw'>SkDrawable::draw()</a> instead.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawDrawable_drawable'><code><strong>drawable</strong></code></a></td>
|
|
<td>custom struct encapsulating drawing commands</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawDrawable_matrix'><code><strong>matrix</strong></code></a></td>
|
|
<td>transformation applied to drawing; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="3a4dfcd08838866b5cfc0d82489195ba"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='undocumented#SkDrawable'>SkDrawable</a> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawDrawable_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawDrawable'>drawDrawable</a>(<a href='undocumented#SkDrawable'>SkDrawable</a>* drawable, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y)
|
|
</pre>
|
|
|
|
<a href='#Draw'>Draw</a> <a href='undocumented#Drawable'>Drawable</a> <a href='#SkCanvas_drawDrawable_2_drawable'>drawable</a> using <a href='#Clip'>Clip</a> and <a href='#Matrix'>Matrix</a>, offset by (<a href='#SkCanvas_drawDrawable_2_x'>x</a>, <a href='#SkCanvas_drawDrawable_2_y'>y</a>).
|
|
|
|
If <a href='#Canvas'>Canvas</a> has an asynchronous implementation, as is the case
|
|
when it is recording into <a href='SkPicture_Reference#Picture'>Picture</a>, then <a href='#SkCanvas_drawDrawable_2_drawable'>drawable</a> will be referenced,
|
|
so that <a href='undocumented#SkDrawable_draw'>SkDrawable::draw()</a> can be called when the operation is finalized. To force
|
|
immediate drawing, call <a href='undocumented#SkDrawable_draw'>SkDrawable::draw()</a> instead.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawDrawable_2_drawable'><code><strong>drawable</strong></code></a></td>
|
|
<td>custom struct encapsulating drawing commands</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawDrawable_2_x'><code><strong>x</strong></code></a></td>
|
|
<td>offset into <a href='#Canvas'>Canvas</a> writable pixels on <a href='#SkCanvas_drawDrawable_2_x'>x</a>-axis</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawDrawable_2_y'><code><strong>y</strong></code></a></td>
|
|
<td>offset into <a href='#Canvas'>Canvas</a> writable pixels on <a href='#SkCanvas_drawDrawable_2_y'>y</a>-axis</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1bdc07ad3b154c89b771722c2fcaee3f"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='undocumented#SkDrawable'>SkDrawable</a> <a href='#SkCanvas_drawPicture'>drawPicture</a><sup><a href='#SkCanvas_drawPicture_2'>[2]</a></sup><sup><a href='#SkCanvas_drawPicture_3'>[3]</a></sup><sup><a href='#SkCanvas_drawPicture_4'>[4]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawAnnotation'></a>
|
|
## drawAnnotation
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawAnnotation'>drawAnnotation</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect, const char key[], <a href='undocumented#SkData'>SkData</a>* value)
|
|
</pre>
|
|
|
|
Associate <a href='SkRect_Reference#Rect'>Rect</a> on <a href='#Canvas'>Canvas</a> with an annotation; a <a href='#SkCanvas_drawAnnotation_key'>key</a>-<a href='#SkCanvas_drawAnnotation_value'>value</a> pair, where the <a href='#SkCanvas_drawAnnotation_key'>key</a> is
|
|
a null-terminated utf8 string, and optional <a href='#SkCanvas_drawAnnotation_value'>value</a> is stored as <a href='undocumented#Data'>Data</a>.
|
|
|
|
Only some canvas implementations, such as recording to <a href='SkPicture_Reference#Picture'>Picture</a>, or drawing to
|
|
<a href='undocumented#PDF'>Document PDF</a>, use annotations.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawAnnotation_rect'><code><strong>rect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> extent of canvas to annotate</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAnnotation_key'><code><strong>key</strong></code></a></td>
|
|
<td>string used for lookup</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAnnotation_value'><code><strong>value</strong></code></a></td>
|
|
<td>data holding <a href='#SkCanvas_drawAnnotation_value'>value</a> stored in annotation</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="00b430bd80d740e19c6d020a940f56d5"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkPicture_Reference#SkPicture'>SkPicture</a> <a href='undocumented#SkDocument'>SkDocument</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_drawAnnotation_2'></a>
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkCanvas_drawAnnotation'>drawAnnotation</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& rect, const char key[], const <a href='undocumented#sk_sp'>sk sp</a><<a href='undocumented#SkData'>SkData</a>>& value)
|
|
</pre>
|
|
|
|
Associate <a href='SkRect_Reference#Rect'>Rect</a> on <a href='#Canvas'>Canvas</a> when an annotation; a <a href='#SkCanvas_drawAnnotation_2_key'>key</a>-<a href='#SkCanvas_drawAnnotation_2_value'>value</a> pair, where the <a href='#SkCanvas_drawAnnotation_2_key'>key</a> is
|
|
a null-terminated utf8 string, and optional <a href='#SkCanvas_drawAnnotation_2_value'>value</a> is stored as <a href='undocumented#Data'>Data</a>.
|
|
|
|
Only some canvas implementations, such as recording to <a href='SkPicture_Reference#Picture'>Picture</a>, or drawing to
|
|
<a href='undocumented#PDF'>Document PDF</a>, use annotations.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkCanvas_drawAnnotation_2_rect'><code><strong>rect</strong></code></a></td>
|
|
<td><a href='SkRect_Reference#Rect'>Rect</a> extent of canvas to annotate</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAnnotation_2_key'><code><strong>key</strong></code></a></td>
|
|
<td>string used for lookup</td>
|
|
</tr>
|
|
<tr> <td><a name='SkCanvas_drawAnnotation_2_value'><code><strong>value</strong></code></a></td>
|
|
<td>data holding <a href='#SkCanvas_drawAnnotation_2_value'>value</a> stored in annotation</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="00b430bd80d740e19c6d020a940f56d5"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkPicture_Reference#SkPicture'>SkPicture</a> <a href='undocumented#SkDocument'>SkDocument</a>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_getDrawFilter'></a>
|
|
## getDrawFilter
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='undocumented#SkDrawFilter'>SkDrawFilter</a>* <a href='#SkCanvas_getDrawFilter'>getDrawFilter</a>() const
|
|
</pre>
|
|
|
|
Deprecated.
|
|
|
|
soon
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_setDrawFilter'></a>
|
|
## setDrawFilter
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
virtual <a href='undocumented#SkDrawFilter'>SkDrawFilter</a>* <a href='#SkCanvas_setDrawFilter'>setDrawFilter</a>(<a href='undocumented#SkDrawFilter'>SkDrawFilter</a>* filter)
|
|
</pre>
|
|
|
|
Deprecated.
|
|
|
|
soon
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_isClipEmpty'></a>
|
|
## isClipEmpty
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
virtual bool <a href='#SkCanvas_isClipEmpty'>isClipEmpty</a>() const
|
|
</pre>
|
|
|
|
Returns true if <a href='#Clip'>Clip</a> is empty; that is, nothing will draw.
|
|
|
|
May do work when called; it should not be called
|
|
more often than needed. However, once called, subsequent calls perform no
|
|
work until <a href='#Clip'>Clip</a> changes.
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#Clip'>Clip</a> is empty
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="f106f146a58c8604308d4d8d7086d2f5">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
clip is not empty
|
|
clip is empty
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_isClipRect'>isClipRect</a> <a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a><sup><a href='#SkCanvas_getLocalClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a><sup><a href='#SkCanvas_getDeviceClipBounds_2'>[2]</a></sup>
|
|
|
|
---
|
|
|
|
<a name='SkCanvas_isClipRect'></a>
|
|
## isClipRect
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
virtual bool <a href='#SkCanvas_isClipRect'>isClipRect</a>() const
|
|
</pre>
|
|
|
|
Returns true if <a href='#Clip'>Clip</a> is <a href='SkRect_Reference#Rect'>Rect</a> and not empty.
|
|
Returns false if the clip is empty, or if it is not <a href='SkRect_Reference#Rect'>Rect</a>.
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#Clip'>Clip</a> is <a href='SkRect_Reference#Rect'>Rect</a> and not empty
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9894bfb476c78a8f6c8f49fbbca3d50d">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
clip is rect
|
|
clip is not rect
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkCanvas_isClipEmpty'>isClipEmpty</a> <a href='#SkCanvas_getLocalClipBounds'>getLocalClipBounds</a><sup><a href='#SkCanvas_getLocalClipBounds_2'>[2]</a></sup> <a href='#SkCanvas_getDeviceClipBounds'>getDeviceClipBounds</a><sup><a href='#SkCanvas_getDeviceClipBounds_2'>[2]</a></sup>
|
|
|
|
---
|
|
|