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2280 lines
122 KiB
Markdown
2280 lines
122 KiB
Markdown
SkImageInfo Reference
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===
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<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
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enum <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> {
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<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kLastEnum_SkAlphaType'>kLastEnum_SkAlphaType</a> = <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>,
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};
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static bool <a href='SkImageInfo_Reference#SkAlphaTypeIsOpaque'>SkAlphaTypeIsOpaque</a>(<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at);
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enum <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> {
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<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>,
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<a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
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<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
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<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
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<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_F32_SkColorType'>kRGBA_F32_SkColorType</a>,
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<a href='SkImageInfo_Reference#kLastEnum_SkColorType'>kLastEnum_SkColorType</a> = <a href='SkImageInfo_Reference#kRGBA_F32_SkColorType'>kRGBA_F32_SkColorType</a>,
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<a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> = <a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>,
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<a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> = <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>,
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};
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int <a href='SkImageInfo_Reference#SkColorTypeBytesPerPixel'>SkColorTypeBytesPerPixel</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> ct);
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bool <a href='SkImageInfo_Reference#SkColorTypeIsAlwaysOpaque'>SkColorTypeIsAlwaysOpaque</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> ct);
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bool <a href='SkImageInfo_Reference#SkColorTypeValidateAlphaType'>SkColorTypeValidateAlphaType</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> <a href='#SkImage_colorType'>colorType</a>, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> <a href='#SkImage_alphaType'>alphaType</a>,
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<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>* canonical = nullptr);
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enum <a href='SkImageInfo_Reference#SkYUVColorSpace'>SkYUVColorSpace</a> {
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<a href='SkImageInfo_Reference#kJPEG_SkYUVColorSpace'>kJPEG_SkYUVColorSpace</a>,
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<a href='SkImageInfo_Reference#kRec601_SkYUVColorSpace'>kRec601_SkYUVColorSpace</a>,
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<a href='SkImageInfo_Reference#kRec709_SkYUVColorSpace'>kRec709_SkYUVColorSpace</a>,
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<a href='SkImageInfo_Reference#kLastEnum_SkYUVColorSpace'>kLastEnum_SkYUVColorSpace</a> = <a href='SkImageInfo_Reference#kRec709_SkYUVColorSpace'>kRec709_SkYUVColorSpace</a>,
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};
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struct <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> {
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// <i><a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> interface</i>
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};
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</pre>
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<a href='#Image_Info'>Image_Info</a> specifies the dimensions and encoding of the pixels in a <a href='SkBitmap_Reference#Bitmap'>Bitmap</a>.
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The dimensions are integral width and height. The encoding is how <a href='undocumented#Pixel'>pixel</a>
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bits describe <a href='#Color_Alpha'>Color_Alpha</a>, transparency; <a href='SkColor_Reference#Color'>Color</a> components red, blue,
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and green; and <a href='#Color_Space'>Color_Space</a>, the range and linearity of colors.
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<a href='#Image_Info'>Image_Info</a> describes an uncompressed raster pixels. In contrast, <a href='SkImage_Reference#Image'>Image</a>
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additionally describes compressed pixels like PNG, and <a href='SkSurface_Reference#Surface'>Surface</a> describes
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destinations on the GPU. <a href='SkImage_Reference#Image'>Image</a> and <a href='SkSurface_Reference#Surface'>Surface</a> may be specified by <a href='#Image_Info'>Image_Info</a>,
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but <a href='SkImage_Reference#Image'>Image</a> and <a href='SkSurface_Reference#Surface'>Surface</a> may not contain <a href='#Image_Info'>Image_Info</a>.
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<a name='Alpha_Type'></a>
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<a name='SkAlphaType'></a>
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---
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<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
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enum <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> {
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<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kLastEnum_SkAlphaType'>kLastEnum_SkAlphaType</a> = <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>,
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};
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</pre>
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Describes how to interpret the <a href='SkColor_Reference#Alpha'>alpha</a> component of a <a href='undocumented#Pixel'>pixel</a>. A <a href='undocumented#Pixel'>pixel</a> may
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be opaque, or <a href='#Color_Alpha'>Color_Alpha</a>, describing multiple levels of transparency.
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In simple blending, <a href='#Color_Alpha'>Color_Alpha</a> <a href='SkPath_Reference#Conic_Weight'>weights</a> the draw <a href='SkColor_Reference#Color'>color</a> and the destination
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<a href='SkColor_Reference#Color'>color</a> to create a new <a href='SkColor_Reference#Color'>color</a>. If <a href='SkColor_Reference#Alpha'>alpha</a> describes a weight from zero to one,
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new <a href='SkColor_Reference#Color'>color</a> is set to: <code>draw <a href='SkColor_Reference#Color'>color</a> * <a href='SkColor_Reference#Alpha'>alpha</a> + destination <a href='SkColor_Reference#Color'>color</a> * (1 - <a href='SkColor_Reference#Alpha'>alpha</a>)</code>.
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In practice <a href='SkColor_Reference#Alpha'>alpha</a> is encoded in two or more bits, where 1.0 equals all bits set.
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RGB may have <a href='#Color_Alpha'>Color_Alpha</a> included in each component value; the stored
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value is the original RGB multiplied by <a href='#Color_Alpha'>Color_Alpha</a>. <a href='undocumented#Premultiply'>Premultiplied</a> <a href='SkColor_Reference#Color'>color</a>
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components improve performance.
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### Constants
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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; '>Const</th>
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<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
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<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Details</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 name='kUnknown_SkAlphaType'><code>kUnknown_SkAlphaType</code></a></td>
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<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
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<a href='#Image_Info_Alpha_Type'>Alpha_Type</a> is uninitialized.
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</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 name='kOpaque_SkAlphaType'><code>kOpaque_SkAlphaType</code></a></td>
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<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Opaque'>Opaque</a> </td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
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Pixels are opaque. The <a href='#Image_Info_Color_Type'>Color_Type</a> must have no explicit <a href='SkColor_Reference#Alpha'>alpha</a>
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component, or all <a href='SkColor_Reference#Alpha'>alpha</a> components must be set to their maximum value.
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</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 name='kPremul_SkAlphaType'><code>kPremul_SkAlphaType</code></a></td>
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<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Premul'>Premul</a> </td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
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Pixels have <a href='SkColor_Reference#Alpha'>Alpha</a> <a href='undocumented#Premultiply'>Premultiplied</a> into <a href='SkColor_Reference#Color'>color</a> components.
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<a href='SkSurface_Reference#Surface'>Surface</a> pixels must be <a href='undocumented#Premultiply'>Premultiplied</a>.
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</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 name='kUnpremul_SkAlphaType'><code>kUnpremul_SkAlphaType</code></a></td>
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<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>3</td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Unpremul'>Unpremul</a> </td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
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<a href='undocumented#Pixel'>Pixel</a> <a href='SkColor_Reference#Color'>color</a> component values are independent of <a href='SkColor_Reference#Alpha'>alpha</a> value.
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Images generated from encoded <a href='undocumented#Data'>data</a> like PNG do not <a href='undocumented#Premultiply'>Premultiply</a> <a href='undocumented#Pixel'>pixel</a> <a href='SkColor_Reference#Color'>color</a>
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components. <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a> is supported for <a href='SkImage_Reference#Image'>Image</a> pixels, but not for
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<a href='SkSurface_Reference#Surface'>Surface</a> pixels.
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</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 name='kLastEnum_SkAlphaType'><code>kLastEnum_SkAlphaType</code></a></td>
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<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>3</td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
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<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
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Used by tests to iterate through all valid values.
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</td>
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</tr>
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</table>
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### See Also
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<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>
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<a name='Alpha_Type_Opaque'></a>
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---
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Use <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a> as a hint to optimize drawing when <a href='SkColor_Reference#Alpha'>Alpha</a> component
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of all <a href='undocumented#Pixel'>pixel</a> is set to its maximum value of 1.0; all <a href='SkColor_Reference#Alpha'>alpha</a> component bits are set.
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If <a href='#Image_Info'>Image_Info</a> is set to <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a> but all <a href='SkColor_Reference#Alpha'>alpha</a> values are not 1.0,
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results are undefined.
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### Example
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<div><fiddle-embed name="79146a1a41d58d22582fdc567c6ffe4e"><div><a href='SkColor_Reference#SkPreMultiplyARGB'>SkPreMultiplyARGB</a> parameter a is set to 255, its maximum value, and is interpreted
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as <a href='#Color_Alpha'>Color_Alpha</a> of 1.0. <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a> may be set to improve performance.
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If <a href='SkColor_Reference#SkPreMultiplyARGB'>SkPreMultiplyARGB</a> parameter a is set to a value smaller than 255,
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<a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a> must be used instead to avoid undefined results.
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The four displayed values are the original component values, though not necessarily
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in the same order.
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</div></fiddle-embed></div>
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<a name='Alpha_Type_Premul'></a>
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---
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Use <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a> when stored <a href='SkColor_Reference#Color'>color</a> components are the original <a href='SkColor_Reference#Color'>color</a>
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multiplied by the <a href='SkColor_Reference#Alpha'>alpha</a> component. The <a href='SkColor_Reference#Alpha'>alpha</a> component range of 0.0 to 1.0 is
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achieved by dividing the integer bit value by the maximum bit value.
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<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
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stored <a href='SkColor_Reference#Color'>color</a> = original <a href='SkColor_Reference#Color'>color</a> * <a href='SkColor_Reference#Alpha'>alpha</a> / max <a href='SkColor_Reference#Alpha'>alpha </a>
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</pre>
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The <a href='SkColor_Reference#Color'>color</a> component must be equal to or smaller than the <a href='SkColor_Reference#Alpha'>alpha</a> component,
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or the results are undefined.
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### Example
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<div><fiddle-embed name="ad696b39c915803d566e96896ec3a36c"><div><a href='SkColor_Reference#SkPreMultiplyARGB'>SkPreMultiplyARGB</a> parameter a is set to 150, less than its maximum value, and is
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interpreted as <a href='#Color_Alpha'>Color_Alpha</a> of about 0.6. <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a> must be set, since
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<a href='SkColor_Reference#SkPreMultiplyARGB'>SkPreMultiplyARGB</a> parameter a is set to a value smaller than 255,
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to avoid undefined results.
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The four displayed values reflect that the <a href='SkColor_Reference#Alpha'>alpha</a> component has been multiplied
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by the original <a href='SkColor_Reference#Color'>color</a>.
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</div></fiddle-embed></div>
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<a name='Alpha_Type_Unpremul'></a>
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---
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Use <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a> if stored <a href='SkColor_Reference#Color'>color</a> components are not divided by the
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<a href='SkColor_Reference#Alpha'>alpha</a> component. Some drawing destinations may not support
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<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>.
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### Example
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<div><fiddle-embed name="b8216a9e5ff5bc61a0e46eba7d36307b"><div><a href='SkColor_Reference#SkColorSetARGB'>SkColorSetARGB</a> parameter a is set to 150, less than its maximum value, and is
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interpreted as <a href='#Color_Alpha'>Color_Alpha</a> of about 0.6. <a href='SkColor_Reference#Color'>color</a> is not <a href='undocumented#Premultiply'>Premultiplied</a>;
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<a href='SkColor_Reference#Color'>color</a> components may have values greater than <a href='SkColor_Reference#Color'>color alpha</a>.
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The four displayed values are the original component values, though not necessarily
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in the same order.
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</div></fiddle-embed></div>
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<a name='SkAlphaTypeIsOpaque'></a>
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---
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<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
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static bool <a href='SkImageInfo_Reference#SkAlphaTypeIsOpaque'>SkAlphaTypeIsOpaque</a>(<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at)
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</pre>
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Returns true if <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> equals <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>. <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a> is a
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hint that the <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> is opaque, or that all <a href='SkColor_Reference#Alpha'>alpha</a> values are set to
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their 1.0 equivalent. If <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> is <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, and <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> is not
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opaque, then the result of drawing any <a href='undocumented#Pixel'>pixel</a> with a <a href='SkColor_Reference#Alpha'>alpha</a> value less than
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1.0 is undefined.
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### Parameters
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<table> <tr> <td><a name='SkAlphaTypeIsOpaque_at'><code><strong>at</strong></code></a></td>
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<td>one of:</td>
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</tr>
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</table>
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<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
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<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
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### Return Value
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true if <a href='#SkAlphaTypeIsOpaque_at'>at</a> equals <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>
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<a name='Color_Type'></a>
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<a name='SkColorType'></a>
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---
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<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
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enum <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> {
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<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>,
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<a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
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<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
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<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
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<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>,
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<a href='SkImageInfo_Reference#kRGBA_F32_SkColorType'>kRGBA_F32_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kLastEnum_SkColorType'>kLastEnum_SkColorType</a> = <a href='SkImageInfo_Reference#kRGBA_F32_SkColorType'>kRGBA_F32_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> = <a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> = <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>,
|
|
};
|
|
</pre>
|
|
|
|
Describes how <a href='undocumented#Pixel'>pixel</a> bits encode <a href='SkColor_Reference#Color'>color</a>. A <a href='undocumented#Pixel'>pixel</a> may be an <a href='SkColor_Reference#Alpha'>alpha</a> mask, a
|
|
grayscale, RGB, or ARGB.
|
|
|
|
<a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> selects the native 32-bit ARGB format. On <a href='#Little_Endian'>Little_Endian</a>
|
|
processors, pixels containing 8-bit ARGB components pack into 32-bit
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>. On <a href='#Big_Endian'>Big_Endian</a> processors, pixels pack into 32-bit
|
|
<a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</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; '>Details</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='kUnknown_SkColorType'><code>kUnknown_SkColorType</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; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
<a href='#Image_Info_Color_Type'>Color_Type</a> is set to <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a> by default. If set,
|
|
encoding format and <a href='undocumented#Size'>size</a> is unknown.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kAlpha_8_SkColorType'><code>kAlpha_8_SkColorType</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; '><a href='#Alpha_8'>Alpha 8</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 8-bit byte <a href='undocumented#Pixel'>pixel</a> encoding that represents transparency. Value of zero
|
|
is completely transparent; a value of 255 is completely opaque.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRGB_565_SkColorType'><code>kRGB_565_SkColorType</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; '><a href='#RGB_565'>RGB 565</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 16-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains five bits of blue,
|
|
six bits of green, and five bits of red.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kARGB_4444_SkColorType'><code>kARGB_4444_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>3</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#ARGB_4444'>ARGB 4444</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 16-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains four bits of <a href='SkColor_Reference#Alpha'>alpha</a>,
|
|
four bits of blue, four bits of green, and four bits of red.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRGBA_8888_SkColorType'><code>kRGBA_8888_SkColorType</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; '><a href='#RGBA_8888'>RGBA 8888</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 32-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains eight bits of red,
|
|
eight bits of green, eight bits of blue, and eight bits of <a href='SkColor_Reference#Alpha'>alpha</a>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRGB_888x_SkColorType'><code>kRGB_888x_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>5</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#RGB_888'>RGB 888</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 32-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains eight bits of red,
|
|
eight bits of green, eight bits of blue, and eight unused bits.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kBGRA_8888_SkColorType'><code>kBGRA_8888_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>6</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#BGRA_8888'>BGRA 8888</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 32-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains eight bits of blue,
|
|
eight bits of green, eight bits of red, and eight bits of <a href='SkColor_Reference#Alpha'>alpha</a>.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRGBA_1010102_SkColorType'><code>kRGBA_1010102_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>7</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#RGBA_1010102'>RGBA 1010102</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 32-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains ten bits of red,
|
|
ten bits of green, ten bits of blue, and two bits of <a href='SkColor_Reference#Alpha'>alpha</a>.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRGB_101010x_SkColorType'><code>kRGB_101010x_SkColorType</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; '><a href='#RGB_101010'>RGB 101010</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 32-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains ten bits of red,
|
|
ten bits of green, ten bits of blue, and two unused bits.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kGray_8_SkColorType'><code>kGray_8_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>9</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#Gray_8'>Gray 8</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 8-bit byte <a href='undocumented#Pixel'>pixel</a> encoding that equivalent to equal values for red,
|
|
blue, and green, representing colors from black to white.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRGBA_F16_SkColorType'><code>kRGBA_F16_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>10</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#RGBA_F16'>RGBA F16</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 64-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains 16 bits of blue,
|
|
16 bits of green, 16 bits of red, and 16 bits of <a href='SkColor_Reference#Alpha'>alpha</a>. Each component
|
|
is encoded as a half float.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRGBA_F32_SkColorType'><code>kRGBA_F32_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>11</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a href='#RGBA_F32'>RGBA F32</a> </td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Stores 128-bit word <a href='undocumented#Pixel'>pixel</a> encoding that contains 32 bits of blue,
|
|
32 bits of green, 32 bits of red, and 32 bits of <a href='SkColor_Reference#Alpha'>alpha</a>. Each component
|
|
is encoded as a single precision float.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kLastEnum_SkColorType'><code>kLastEnum_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>11</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Used by tests to iterate through all valid values.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kN32_SkColorType'><code>kN32_SkColorType</code></a></td>
|
|
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>4 or 6</td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '></td>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
|
|
Encodes ARGB as either <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a> or
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, whichever is native to the platform.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### See Also
|
|
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>
|
|
|
|
<a name='Color_Type_Alpha_8'></a>
|
|
|
|
---
|
|
|
|
<a href='SkColor_Reference#Alpha'>Alpha</a> pixels encode transparency without <a href='SkColor_Reference#Color'>color</a> information. Value of zero is
|
|
completely transparent; a value of 255 is completely opaque. <a href='SkBitmap_Reference#Bitmap'>Bitmap</a>
|
|
pixels do not visibly draw, because its pixels have no <a href='SkColor_Reference#Color'>color</a> information.
|
|
When <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> is set to <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, the paired <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> is
|
|
ignored.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="21ae21e4ce53d2018e042dd457997300"><div><a href='SkColor_Reference#Alpha'>Alpha</a> pixels can modify another draw. orangePaint fills the bounds of <a href='SkBitmap_Reference#Bitmap'>bitmap</a>,
|
|
with its transparency set to alpha8 <a href='undocumented#Pixel'>pixel</a> value.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkColor_Reference#Alpha'>Alpha</a> <a href='#Image_Info_Color_Type_Gray_8'>Gray_8</a>
|
|
|
|
<a name='Color_Type_RGB_565'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a> encodes RGB to fit in a 16-bit word. Red and blue
|
|
components use five bits describing 32 levels. Green components, more sensitive
|
|
to the eye, use six bits describing 64 levels. <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a> has no
|
|
bits for <a href='SkColor_Reference#Alpha'>Alpha</a>.
|
|
Pixels are fully opaque as if its <a href='#Color_Alpha'>Color_Alpha</a> was set to one, and should
|
|
always be paired with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>.
|
|
|
|
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="7e7c46bb4572e21e13529ff364eb0a9c"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_ARGB_4444'>ARGB_4444</a> <a href='#Image_Info_Color_Type_RGBA_8888'>RGBA_8888</a>
|
|
|
|
<a name='Color_Type_ARGB_4444'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a> encodes ARGB to fit in 16-bit word. Each
|
|
component: <a href='SkColor_Reference#Alpha'>alpha</a>, blue, green, and red; use four bits, describing 16 levels.
|
|
Note that <a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a> is misnamed; the acronym does not
|
|
describe the actual component order.
|
|
|
|
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>: blue, green, and red components are
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> by the <a href='SkColor_Reference#Alpha'>alpha</a> value. If blue, green, or red is greater than <a href='SkColor_Reference#Alpha'>alpha</a>,
|
|
the drawn result is undefined.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>: <a href='SkColor_Reference#Alpha'>alpha</a>, blue, green, and red components
|
|
may have any value. There may be a performance penalty with <a href='undocumented#Unpremultiply'>Unpremultiplied</a>
|
|
pixels.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>: all <a href='SkColor_Reference#Alpha'>alpha</a> component values are at the maximum;
|
|
blue, green, and red components are fully opaque. If any <a href='SkColor_Reference#Alpha'>alpha</a> component is
|
|
less than 15, the drawn result is undefined.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="33a360c3404ac21db801943336843d8e"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_RGBA_8888'>RGBA_8888</a>
|
|
|
|
<a name='Color_Type_RGBA_8888'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a> encodes ARGB into a 32-bit word. Each component:
|
|
red, green, blue, <a href='SkColor_Reference#Alpha'>alpha</a>; use eight bits, describing 256 levels.
|
|
|
|
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>: red, green, and blue components are
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> by the <a href='SkColor_Reference#Alpha'>alpha</a> value. If red, green, or blue is greater than <a href='SkColor_Reference#Alpha'>alpha</a>,
|
|
the drawn result is undefined.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>: <a href='SkColor_Reference#Alpha'>alpha</a>, red, green, and blue components
|
|
may have any value. There may be a performance penalty with <a href='undocumented#Unpremultiply'>Unpremultiplied</a>
|
|
pixels.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>: all <a href='SkColor_Reference#Alpha'>alpha</a> component values are at the maximum;
|
|
red, green, and blue components are fully opaque. If any <a href='SkColor_Reference#Alpha'>alpha</a> component is
|
|
less than 255, the drawn result is undefined.
|
|
|
|
On <a href='#Big_Endian'>Big_Endian</a> platforms, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a> is the native <a href='#Image_Info_Color_Type'>Color_Type</a>, and
|
|
will have the best performance. Use <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> to choose the best
|
|
<a href='#Image_Info_Color_Type'>Color_Type</a> for the platform at compile time.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="947922a19d59893fe7f9d9ee1954379b"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_RGB_888'>RGB_888</a> <a href='#Image_Info_Color_Type_BGRA_8888'>BGRA_8888</a>
|
|
|
|
<a name='Color_Type_RGB_888'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a> encodes RGB into a 32-bit word. Each component:
|
|
red, green, blue; use eight bits, describing 256 levels. Eight bits are
|
|
unused. Pixels described by <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a> are fully opaque as if
|
|
their <a href='#Color_Alpha'>Color_Alpha</a> was set to one, and should always be paired with
|
|
<a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>.
|
|
|
|
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4260d6cc15db2c60c07f6fdc8d9ae425"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_RGBA_8888'>RGBA_8888</a> <a href='#Image_Info_Color_Type_BGRA_8888'>BGRA_8888</a>
|
|
|
|
<a name='Color_Type_BGRA_8888'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a> encodes ARGB into a 32-bit word. Each component:
|
|
blue, green, red, and <a href='SkColor_Reference#Alpha'>alpha</a>; use eight bits, describing 256 levels.
|
|
|
|
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>: blue, green, and red components are
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> by the <a href='SkColor_Reference#Alpha'>alpha</a> value. If blue, green, or red is greater than <a href='SkColor_Reference#Alpha'>alpha</a>,
|
|
the drawn result is undefined.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>: blue, green, red, and <a href='SkColor_Reference#Alpha'>alpha</a> components
|
|
may have any value. There may be a performance penalty with <a href='undocumented#Unpremultiply'>Unpremultiplied</a>
|
|
pixels.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>: all <a href='SkColor_Reference#Alpha'>alpha</a> component values are at the maximum;
|
|
blue, green, and red components are fully opaque. If any <a href='SkColor_Reference#Alpha'>alpha</a> component is
|
|
less than 255, the drawn result is undefined.
|
|
|
|
On <a href='#Little_Endian'>Little_Endian</a> platforms, <a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a> is the native <a href='#Image_Info_Color_Type'>Color_Type</a>,
|
|
and will have the best performance. Use <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> to choose the best
|
|
<a href='#Image_Info_Color_Type'>Color_Type</a> for the platform at compile time.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="945ce5344fce5470f8604b2e06e9f9ae"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_RGBA_8888'>RGBA_8888</a>
|
|
|
|
<a name='Color_Type_RGBA_1010102'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a> encodes ARGB into a 32-bit word. Each
|
|
<a href='SkColor_Reference#Color'>Color</a> component: red, green, and blue; use ten bits, describing 1024 levels.
|
|
Two bits contain <a href='SkColor_Reference#Alpha'>alpha</a>, describing four levels. Possible <a href='SkColor_Reference#Alpha'>alpha</a>
|
|
values are zero: fully transparent; one: 33% opaque; two: 67% opaque;
|
|
three: fully opaque.
|
|
|
|
At present, <a href='SkColor_Reference#Color'>Color</a> in <a href='SkPaint_Reference#Paint'>Paint</a> does not provide enough precision to
|
|
draw all colors possible to a <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a> <a href='SkSurface_Reference#Surface'>Surface</a>.
|
|
|
|
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>: red, green, and blue components are
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> by the <a href='SkColor_Reference#Alpha'>alpha</a> value. If red, green, or blue is greater than the
|
|
<a href='SkColor_Reference#Alpha'>alpha</a> replicated to ten bits, the drawn result is undefined.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>: <a href='SkColor_Reference#Alpha'>alpha</a>, red, green, and blue components
|
|
may have any value. There may be a performance penalty with <a href='undocumented#Unpremultiply'>Unpremultiplied</a>
|
|
pixels.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>: all <a href='SkColor_Reference#Alpha'>alpha</a> component values are at the maximum;
|
|
red, green, and blue components are fully opaque. If any <a href='SkColor_Reference#Alpha'>alpha</a> component is
|
|
less than three, the drawn result is undefined.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="1282dc1127ce1b0061544619ae4de0f0"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_RGB_101010'>RGB_101010</a> <a href='#Image_Info_Color_Type_RGBA_8888'>RGBA_8888</a>
|
|
|
|
<a name='Color_Type_RGB_101010'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a> encodes RGB into a 32-bit word. Each
|
|
<a href='SkColor_Reference#Color'>Color</a> component: red, green, and blue; use ten bits, describing 1024 levels.
|
|
Two bits are unused. Pixels described by <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a> are fully
|
|
opaque as if its <a href='#Color_Alpha'>Color_Alpha</a> was set to one, and should always be paired
|
|
with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>.
|
|
|
|
At present, <a href='SkColor_Reference#Color'>Color</a> in <a href='SkPaint_Reference#Paint'>Paint</a> does not provide enough precision to
|
|
draw all colors possible to a <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a> <a href='SkSurface_Reference#Surface'>Surface</a>.
|
|
|
|
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="92f81aa0459230459600a01e79ccff29"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_RGBA_1010102'>RGBA_1010102</a>
|
|
|
|
<a name='Color_Type_Gray_8'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a> encodes grayscale level in eight bits that is equivalent
|
|
to equal values for red, blue, and green, representing colors from black to
|
|
white. Pixels described by <a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a> are fully
|
|
opaque as if its <a href='#Color_Alpha'>Color_Alpha</a> was set to one, and should always be paired with
|
|
<a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="93da0eb0b6722a4f33dc7dae094abf0b"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Image_Info_Color_Type_Alpha_8'>Alpha_8</a>
|
|
|
|
<a name='Color_Type_RGBA_F16'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a> encodes ARGB into a 64-bit word. Each component:
|
|
blue, green, red, and <a href='SkColor_Reference#Alpha'>alpha</a>; use 16 bits, describing a floating <a href='SkPoint_Reference#Point'>point</a> value,
|
|
from -65500 to 65000 with 3.31 decimal digits of precision.
|
|
|
|
At present, <a href='SkColor_Reference#Color'>Color</a> in <a href='SkPaint_Reference#Paint'>Paint</a> does not provide enough precision or range to
|
|
draw all colors possible to a <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a> <a href='SkSurface_Reference#Surface'>Surface</a>.
|
|
|
|
Each component encodes a floating <a href='SkPoint_Reference#Point'>point</a> value using
|
|
<a href='https://www.khronos.org/opengl/wiki/Small_Float_Formats'>Half floats</a></a>. Meaningful colors are represented by the range 0.0 to 1.0, although smaller
|
|
and larger values may be useful when used in combination with <a href='#Transfer_Mode'>Transfer_Mode</a>.
|
|
|
|
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>: blue, green, and red components are
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> by the <a href='SkColor_Reference#Alpha'>alpha</a> value. If blue, green, or red is greater than <a href='SkColor_Reference#Alpha'>alpha</a>,
|
|
the drawn result is undefined.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>: blue, green, red, and <a href='SkColor_Reference#Alpha'>alpha</a> components
|
|
may have any value. There may be a performance penalty with <a href='undocumented#Unpremultiply'>Unpremultiplied</a>
|
|
pixels.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>: all <a href='SkColor_Reference#Alpha'>alpha</a> component values are at the maximum;
|
|
blue, green, and red components are fully opaque. If any <a href='SkColor_Reference#Alpha'>alpha</a> component is
|
|
less than one, the drawn result is undefined.
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="dd81527bbdf5eaae7dd21ac04ab84f9e"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkColor4f_Reference#SkColor4f'>SkColor4f</a>
|
|
|
|
<a name='Color_Type_RGBA_F32'></a>
|
|
|
|
---
|
|
|
|
<a href='SkImageInfo_Reference#kRGBA_F32_SkColorType'>kRGBA_F32_SkColorType</a> encodes ARGB into a 128-bit word. Each component:
|
|
blue, green, red, and <a href='SkColor_Reference#Alpha'>alpha</a>; use 32 bits, describing a floating <a href='SkPoint_Reference#Point'>point</a> value,
|
|
from -3.402823e+38 to 3.402823e+38 with 7.225 decimal digits of precision.
|
|
|
|
At present, <a href='SkColor_Reference#Color'>Color</a> in <a href='SkPaint_Reference#Paint'>Paint</a> does not provide enough precision or range to
|
|
draw all colors possible to a <a href='SkImageInfo_Reference#kRGBA_F32_SkColorType'>kRGBA_F32_SkColorType</a> <a href='SkSurface_Reference#Surface'>Surface</a>.
|
|
|
|
Each component encodes a floating <a href='SkPoint_Reference#Point'>point</a> value using
|
|
<a href='https://en.wikipedia.org/wiki/Single-precision_floating-point_format'>single-precision floats</a></a>. Meaningful colors are represented by the range 0.0 to 1.0, although smaller
|
|
and larger values may be useful when used in combination with <a href='#Transfer_Mode'>Transfer_Mode</a>.
|
|
|
|
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>: blue, green, and red components are
|
|
<a href='undocumented#Premultiply'>Premultiplied</a> by the <a href='SkColor_Reference#Alpha'>alpha</a> value. If blue, green, or red is greater than <a href='SkColor_Reference#Alpha'>alpha</a>,
|
|
the drawn result is undefined.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>: blue, green, red, and <a href='SkColor_Reference#Alpha'>alpha</a> components
|
|
may have any value. There may be a performance penalty with <a href='undocumented#Unpremultiply'>Unpremultiplied</a>
|
|
pixels.
|
|
|
|
If paired with <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>: all <a href='SkColor_Reference#Alpha'>alpha</a> component values are at the maximum;
|
|
blue, green, and red components are fully opaque. If any <a href='SkColor_Reference#Alpha'>alpha</a> component is
|
|
less than one, the drawn result is undefined.
|
|
|
|
### See Also
|
|
|
|
<a href='SkColor4f_Reference#SkColor4f'>SkColor4f</a>
|
|
|
|
<a name='SkColorTypeBytesPerPixel'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='SkImageInfo_Reference#SkColorTypeBytesPerPixel'>SkColorTypeBytesPerPixel</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> ct)
|
|
</pre>
|
|
|
|
Returns the number of bytes required to store a <a href='undocumented#Pixel'>pixel</a>, including unused padding.
|
|
Returns zero if <a href='#SkColorTypeBytesPerPixel_ct'>ct</a> is <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a> or invalid.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkColorTypeBytesPerPixel_ct'><code><strong>ct</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
|
|
### Return Value
|
|
|
|
bytes per <a href='undocumented#Pixel'>pixel</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="09ef49d07cb7005ba3e34d5ea53896f5"><a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>::<a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a>
|
|
|
|
<a name='SkColorTypeIsAlwaysOpaque'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='SkImageInfo_Reference#SkColorTypeIsAlwaysOpaque'>SkColorTypeIsAlwaysOpaque</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> ct)
|
|
</pre>
|
|
|
|
Returns true if <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> always decodes <a href='SkColor_Reference#Alpha'>alpha</a> to 1.0, making the <a href='undocumented#Pixel'>pixel</a>
|
|
fully opaque. If true, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> does not reserve bits to encode <a href='SkColor_Reference#Alpha'>alpha</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkColorTypeIsAlwaysOpaque_ct'><code><strong>ct</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='SkColor_Reference#Alpha'>alpha</a> is always set to 1.0
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9b3eb5aaa0dfea9feee54e7650fa5446"><a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkImageInfo_Reference#SkColorTypeValidateAlphaType'>SkColorTypeValidateAlphaType</a>
|
|
|
|
<a name='SkColorTypeValidateAlphaType'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='SkImageInfo_Reference#SkColorTypeValidateAlphaType'>SkColorTypeValidateAlphaType</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> colorType, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> alphaType,
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>* canonical = nullptr)
|
|
</pre>
|
|
|
|
Returns true if <a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> can be set to a valid <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> for <a href='#SkColorTypeValidateAlphaType_colorType'>colorType</a>. If
|
|
there is more than one valid <a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>, set to <a href='#SkColorTypeValidateAlphaType_alphaType'>alphaType</a>, if valid.
|
|
If true is returned and <a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> is not nullptr, store valid <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>.
|
|
|
|
Returns false only if <a href='#SkColorTypeValidateAlphaType_alphaType'>alphaType</a> is <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#Color_Type'>color type</a> is not
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, and <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> is not always opaque. If false is returned,
|
|
<a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> is ignored.
|
|
|
|
For <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>: set <a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> to <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a> and return true.
|
|
For <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>: set <a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> to <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a> or
|
|
<a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a> and return true if <a href='#SkColorTypeValidateAlphaType_alphaType'>alphaType</a> is not <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>.
|
|
For <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>, and
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>: set <a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> to <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a> and return true.
|
|
For <a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, and <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>: set <a href='#SkColorTypeValidateAlphaType_canonical'>canonical</a> to <a href='#SkColorTypeValidateAlphaType_alphaType'>alphaType</a>
|
|
and return true if <a href='#SkColorTypeValidateAlphaType_alphaType'>alphaType</a> is not <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkColorTypeValidateAlphaType_colorType'><code><strong>colorType</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkColorTypeValidateAlphaType_alphaType'><code><strong>alphaType</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
|
|
<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkColorTypeValidateAlphaType_canonical'><code><strong>canonical</strong></code></a></td>
|
|
<td>storage for <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a></td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if valid <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> can be associated with <a href='#SkColorTypeValidateAlphaType_colorType'>colorType</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="befac1c29ed21507d367e4d824383a04"><a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
|
|
<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='SkImageInfo_Reference#SkColorTypeIsAlwaysOpaque'>SkColorTypeIsAlwaysOpaque</a>
|
|
|
|
<a name='YUV_ColorSpace'></a>
|
|
|
|
<a name='SkYUVColorSpace'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
enum <a href='SkImageInfo_Reference#SkYUVColorSpace'>SkYUVColorSpace</a> {
|
|
<a href='SkImageInfo_Reference#kJPEG_SkYUVColorSpace'>kJPEG_SkYUVColorSpace</a>,
|
|
<a href='SkImageInfo_Reference#kRec601_SkYUVColorSpace'>kRec601_SkYUVColorSpace</a>,
|
|
<a href='SkImageInfo_Reference#kRec709_SkYUVColorSpace'>kRec709_SkYUVColorSpace</a>,
|
|
<a href='SkImageInfo_Reference#kLastEnum_SkYUVColorSpace'>kLastEnum_SkYUVColorSpace</a> = <a href='SkImageInfo_Reference#kRec709_SkYUVColorSpace'>kRec709_SkYUVColorSpace</a>,
|
|
};
|
|
</pre>
|
|
|
|
Describes <a href='SkColor_Reference#Color'>color</a> range of YUV pixels. The <a href='SkColor_Reference#Color'>color</a> mapping from YUV to RGB varies
|
|
depending on the source. YUV pixels may be generated by JPEG images, standard
|
|
video streams, or high definition video streams. Each has its own mapping from
|
|
YUV and RGB.
|
|
|
|
JPEG YUV values encode the full range of 0 to 255 for all three components.
|
|
Video YUV values range from 16 to 235 for all three components. Details of
|
|
encoding and conversion to RGB are described in
|
|
<a href='https://en.wikipedia.org/wiki/YCbCr'>YCbCr color space</a></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='kJPEG_SkYUVColorSpace'><code>kJPEG_SkYUVColorSpace</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; '>
|
|
Describes standard JPEG <a href='undocumented#Color_Space'>color space</a>;
|
|
<a href='https://en.wikipedia.org/wiki/Rec._601'>CCIR 601</a></a> with full range of 0 to 255 for components.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRec601_SkYUVColorSpace'><code>kRec601_SkYUVColorSpace</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; '>
|
|
Describes standard used by standard definition television;
|
|
<a href='https://en.wikipedia.org/wiki/Rec._601'>CCIR 601</a></a> with studio range of 16 to 235 range for components.
|
|
</td>
|
|
</tr>
|
|
<tr style='background-color: #f0f0f0; '>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kRec709_SkYUVColorSpace'><code>kRec709_SkYUVColorSpace</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; '>
|
|
Describes standard used by high definition television;
|
|
<a href='https://en.wikipedia.org/wiki/Rec._709'>Rec. 709</a></a> with studio range of 16 to 235 range for components.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kLastEnum_SkYUVColorSpace'><code>kLastEnum_SkYUVColorSpace</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; '>
|
|
Used by tests to iterate through all valid values.
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### See Also
|
|
|
|
<a href='SkImage_Reference#SkImage'>SkImage</a>::<a href='#SkImage_MakeFromYUVTexturesCopy'>MakeFromYUVTexturesCopy</a> <a href='SkImage_Reference#SkImage'>SkImage</a>::<a href='#SkImage_MakeFromNV12TexturesCopy'>MakeFromNV12TexturesCopy</a>
|
|
|
|
<a name='SkImageInfo'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
|
|
struct <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> {
|
|
public:
|
|
<a href='#SkImageInfo_empty_constructor'>SkImageInfo()</a>;
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_Make'>Make</a>(int width, int height, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> ct, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at,
|
|
<a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs = nullptr);
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeN32'>MakeN32</a>(int width, int height, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at,
|
|
<a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs = nullptr);
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a>(int width, int height, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at);
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeN32Premul'>MakeN32Premul</a>(int width, int height, <a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs = nullptr);
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeN32Premul'>MakeN32Premul</a>(const <a href='undocumented#SkISize'>SkISize</a>& <a href='undocumented#Size'>size</a>);
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a>(int width, int height);
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeUnknown'>MakeUnknown</a>(int width, int height);
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeUnknown'>MakeUnknown</a>();
|
|
int <a href='#SkImageInfo_width'>width()</a> const;
|
|
int <a href='#SkImageInfo_height'>height()</a> const;
|
|
<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> <a href='#SkImageInfo_colorType'>colorType</a>() const;
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> <a href='#SkImageInfo_alphaType'>alphaType</a>() const;
|
|
<a href='undocumented#SkColorSpace'>SkColorSpace</a>* <a href='#SkImageInfo_colorSpace'>colorSpace</a>() const;
|
|
<a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> <a href='#SkImageInfo_refColorSpace'>refColorSpace</a>() const;
|
|
bool <a href='#SkImageInfo_isEmpty'>isEmpty</a>() const;
|
|
bool <a href='#SkImageInfo_isOpaque'>isOpaque</a>() const;
|
|
<a href='undocumented#SkISize'>SkISize</a> <a href='#SkImageInfo_dimensions'>dimensions()</a> const;
|
|
<a href='SkIRect_Reference#SkIRect'>SkIRect</a> <a href='#SkImageInfo_bounds'>bounds()</a> const;
|
|
bool <a href='#SkImageInfo_gammaCloseToSRGB'>gammaCloseToSRGB</a>() const;
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeWH'>makeWH</a>(int newWidth, int newHeight) const;
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeAlphaType'>makeAlphaType</a>(<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> newAlphaType) const;
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeColorType'>makeColorType</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> newColorType) const;
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeColorSpace'>makeColorSpace</a>(<a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs) const;
|
|
int <a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a>() const;
|
|
int <a href='#SkImageInfo_shiftPerPixel'>shiftPerPixel</a>() const;
|
|
uint64_t <a href='#SkImageInfo_minRowBytes64'>minRowBytes64</a>() const;
|
|
size_t <a href='#SkImageInfo_minRowBytes'>minRowBytes</a>() const;
|
|
size_t <a href='#SkImageInfo_computeOffset'>computeOffset</a>(int x, int y, size_t rowBytes) const;
|
|
bool operator==(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& other) const;
|
|
bool operator!=(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& other) const;
|
|
size_t <a href='#SkImageInfo_computeByteSize'>computeByteSize</a>(size_t rowBytes) const;
|
|
size_t <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a>() const;
|
|
static bool <a href='#SkImageInfo_ByteSizeOverflowed'>ByteSizeOverflowed</a>(size_t byteSize);
|
|
bool <a href='#SkImageInfo_validRowBytes'>validRowBytes</a>(size_t rowBytes) const;
|
|
void <a href='#SkImageInfo_reset'>reset()</a>;
|
|
void <a href='#SkImageInfo_validate'>validate()</a> const;
|
|
};
|
|
</pre>
|
|
|
|
Describes <a href='undocumented#Pixel'>pixel</a> dimensions and encoding. <a href='SkBitmap_Reference#Bitmap'>Bitmap</a>, <a href='SkImage_Reference#Image'>Image</a>, <a href='SkPixmap_Reference#Pixmap'>Pixmap</a>, and <a href='SkSurface_Reference#Surface'>Surface</a>
|
|
can be created from <a href='#Image_Info'>Image_Info</a>. <a href='#Image_Info'>Image_Info</a> can be retrieved from <a href='SkBitmap_Reference#Bitmap'>Bitmap</a> and
|
|
<a href='SkPixmap_Reference#Pixmap'>Pixmap</a>, but not from <a href='SkImage_Reference#Image'>Image</a> and <a href='SkSurface_Reference#Surface'>Surface</a>. For example, <a href='SkImage_Reference#Image'>Image</a> and <a href='SkSurface_Reference#Surface'>Surface</a>
|
|
implementations may defer <a href='undocumented#Pixel'>pixel</a> depth, so may not completely specify <a href='#Image_Info'>Image_Info</a>.
|
|
|
|
<a href='#Image_Info'>Image_Info</a> contains dimensions, the <a href='undocumented#Pixel'>pixel</a> integral width and height. It encodes
|
|
how <a href='undocumented#Pixel'>pixel</a> bits describe <a href='#Color_Alpha'>Color_Alpha</a>, transparency; <a href='SkColor_Reference#Color'>Color</a> components red, blue,
|
|
and green; and <a href='#Color_Space'>Color_Space</a>, the range and linearity of colors.
|
|
|
|
<a name='SkImageInfo_empty_constructor'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='#SkImageInfo_empty_constructor'>SkImageInfo()</a>
|
|
</pre>
|
|
|
|
Creates an empty <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>,
|
|
a width and height of zero, and no <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
|
|
|
|
### Return Value
|
|
|
|
empty <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="f206f698e7a8db3d84334c26b1a702dc"><div>An empty <a href='#Image_Info'>Image_Info</a> may be passed to <a href='SkCanvas_Reference#SkCanvas'>SkCanvas</a>::<a href='#SkCanvas_accessTopLayerPixels'>accessTopLayerPixels</a> as storage
|
|
for the <a href='SkCanvas_Reference#Canvas'>Canvas</a> actual <a href='#Image_Info'>Image_Info</a>.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_Make'>Make</a> <a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a>
|
|
|
|
<a name='SkImageInfo_Make'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_Make'>Make</a>(int width, int height, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> ct, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at,
|
|
<a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs = nullptr)
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions <a href='#SkImageInfo_Make_width'>width</a> and <a href='#SkImageInfo_Make_height'>height</a>, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> <a href='#SkImageInfo_Make_ct'>ct</a>,
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> <a href='#SkImageInfo_Make_at'>at</a>, and optionally <a href='undocumented#SkColorSpace'>SkColorSpace</a> <a href='#SkImageInfo_Make_cs'>cs</a>.
|
|
|
|
If <a href='undocumented#SkColorSpace'>SkColorSpace</a> <a href='#SkImageInfo_Make_cs'>cs</a> is nullptr and <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> is part of drawing source: <a href='undocumented#SkColorSpace'>SkColorSpace</a>
|
|
defaults to sRGB, mapping into <a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
|
|
|
|
Parameters are not validated to see if their values are legal, or that the
|
|
combination is supported.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_Make_width'><code><strong>width</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> column count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_Make_height'><code><strong>height</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> row count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_Make_ct'><code><strong>ct</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_Make_at'><code><strong>at</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
|
|
<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_Make_cs'><code><strong>cs</strong></code></a></td>
|
|
<td>range of colors; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9f47f9c2a99473f5b1113db48096d586"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeN32Premul'>MakeN32Premul</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a>
|
|
|
|
<a name='SkImageInfo_MakeN32'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeN32'>MakeN32</a>(int width, int height, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at, <a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs = nullptr)
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions <a href='#SkImageInfo_MakeN32_width'>width</a> and <a href='#SkImageInfo_MakeN32_height'>height</a>, <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> <a href='#SkImageInfo_MakeN32_at'>at</a>, and optionally <a href='undocumented#SkColorSpace'>SkColorSpace</a> <a href='#SkImageInfo_MakeN32_cs'>cs</a>. <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a> will equal either
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a> or <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, whichever is optimal.
|
|
|
|
If <a href='undocumented#SkColorSpace'>SkColorSpace</a> <a href='#SkImageInfo_MakeN32_cs'>cs</a> is nullptr and <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> is part of drawing source: <a href='undocumented#SkColorSpace'>SkColorSpace</a>
|
|
defaults to sRGB, mapping into <a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
|
|
|
|
Parameters are not validated to see if their values are legal, or that the
|
|
combination is supported.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_MakeN32_width'><code><strong>width</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> column count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeN32_height'><code><strong>height</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> row count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeN32_at'><code><strong>at</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
|
|
<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_MakeN32_cs'><code><strong>cs</strong></code></a></td>
|
|
<td>range of colors; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="78cea0c4cac205b61ad6f6c982cbd888"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_Make'>Make</a> <a href='#SkImageInfo_MakeN32Premul'>MakeN32Premul</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a>
|
|
|
|
<a name='SkImageInfo_MakeS32'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a>(int width, int height, <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> at)
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions <a href='#SkImageInfo_MakeS32_width'>width</a> and <a href='#SkImageInfo_MakeS32_height'>height</a>, <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> <a href='#SkImageInfo_MakeS32_at'>at</a>, with sRGB <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
|
|
|
|
Parameters are not validated to see if their values are legal, or that the
|
|
combination is supported.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_MakeS32_width'><code><strong>width</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> column count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeS32_height'><code><strong>height</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> row count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeS32_at'><code><strong>at</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
|
|
<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="de418ccb42471d1589508ef3955f8c53"><div>Top gradient is drawn to offScreen without <a href='#Color_Space'>Color_Space</a>. It is darker than middle
|
|
gradient, drawn to offScreen with sRGB <a href='#Color_Space'>Color_Space</a>. Bottom gradient shares bits
|
|
with middle, but does not specify the <a href='#Color_Space'>Color_Space</a> in noColorSpaceBitmap. A source
|
|
without <a href='#Color_Space'>Color_Space</a> is treated as sRGB; the bottom gradient is identical to the
|
|
middle gradient.
|
|
</div></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_Make'>Make</a> <a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeN32Premul'>MakeN32Premul</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a>
|
|
|
|
<a name='SkImageInfo_MakeN32Premul'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeN32Premul'>MakeN32Premul</a>(int width, int height, <a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs = nullptr)
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions <a href='#SkImageInfo_MakeN32Premul_width'>width</a> and <a href='#SkImageInfo_MakeN32Premul_height'>height</a>, <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>, with optional <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
|
|
|
|
If <a href='undocumented#SkColorSpace'>SkColorSpace</a> <a href='#SkImageInfo_MakeN32Premul_cs'>cs</a> is nullptr and <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> is part of drawing source: <a href='undocumented#SkColorSpace'>SkColorSpace</a>
|
|
defaults to sRGB, mapping into <a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
|
|
|
|
Parameters are not validated to see if their values are legal, or that the
|
|
combination is supported.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_MakeN32Premul_width'><code><strong>width</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> column count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeN32Premul_height'><code><strong>height</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> row count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeN32Premul_cs'><code><strong>cs</strong></code></a></td>
|
|
<td>range of colors; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="525650a67e19fdd8ca9f72b7eda65174"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a> <a href='#SkImageInfo_Make'>Make</a>
|
|
|
|
<a name='SkImageInfo_MakeN32Premul_2'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeN32Premul'>MakeN32Premul</a>(const <a href='undocumented#SkISize'>SkISize</a>& <a href='undocumented#Size'>size</a>)
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions width and height, <a href='SkImageInfo_Reference#kN32_SkColorType'>kN32_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>, with <a href='undocumented#SkColorSpace'>SkColorSpace</a> set to nullptr.
|
|
|
|
If <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> is part of drawing source: <a href='undocumented#SkColorSpace'>SkColorSpace</a> defaults to sRGB, mapping
|
|
into <a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
|
|
|
|
Parameters are not validated to see if their values are legal, or that the
|
|
combination is supported.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_MakeN32Premul_2_size'><code><strong>size</strong></code></a></td>
|
|
<td>width and height, each must be zero or greater</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="b9026d7f39029756bd7cab9542c64f4e"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a> <a href='#SkImageInfo_Make'>Make</a>
|
|
|
|
<a name='SkImageInfo_MakeA8'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a>(int width, int height)
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions <a href='#SkImageInfo_MakeA8_width'>width</a> and <a href='#SkImageInfo_MakeA8_height'>height</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>, with <a href='undocumented#SkColorSpace'>SkColorSpace</a> set to nullptr.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_MakeA8_width'><code><strong>width</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> column count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeA8_height'><code><strong>height</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> row count; must be zero or greater</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="547388991687b8e10d482d8b1c82777d"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_Make'>Make</a>
|
|
|
|
<a name='SkImageInfo_MakeUnknown'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeUnknown'>MakeUnknown</a>(int width, int height)
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions <a href='#SkImageInfo_MakeUnknown_width'>width</a> and <a href='#SkImageInfo_MakeUnknown_height'>height</a>, <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, with <a href='undocumented#SkColorSpace'>SkColorSpace</a> set to nullptr.
|
|
|
|
Returned <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> as part of source does not draw, and as part of destination
|
|
can not be drawn to.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_MakeUnknown_width'><code><strong>width</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> column count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_MakeUnknown_height'><code><strong>height</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> row count; must be zero or greater</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="75f13a78b28b08c72baf32b7d868de1c"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_empty_constructor'>SkImageInfo()</a> <a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_Make'>Make</a>
|
|
|
|
<a name='SkImageInfo_MakeUnknown_2'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_MakeUnknown'>MakeUnknown</a>()
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> from integral dimensions width and height set to zero,
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, with <a href='undocumented#SkColorSpace'>SkColorSpace</a> set to nullptr.
|
|
|
|
Returned <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> as part of source does not draw, and as part of destination
|
|
can not be drawn to.
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="a1af7696ae0cdd6f379546dd1f211b7a"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_empty_constructor'>SkImageInfo()</a> <a href='#SkImageInfo_MakeN32'>MakeN32</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_Make'>Make</a>
|
|
|
|
<a name='Property'></a>
|
|
|
|
<a name='SkImageInfo_width'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkImageInfo_width'>width()</a> const
|
|
</pre>
|
|
|
|
Returns <a href='undocumented#Pixel'>pixel</a> count in each row.
|
|
|
|
### Return Value
|
|
|
|
<a href='undocumented#Pixel'>pixel</a> width
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e2491817695290d0218be77f091b8460"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_height'>height</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_width'>width</a> <a href='undocumented#SkPixelRef'>SkPixelRef</a>::<a href='#SkPixelRef_width'>width</a> <a href='SkImage_Reference#SkImage'>SkImage</a>::<a href='#SkImage_width'>width</a> <a href='SkSurface_Reference#SkSurface'>SkSurface</a>::<a href='#SkSurface_width'>width</a>
|
|
|
|
<a name='SkImageInfo_height'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkImageInfo_height'>height()</a> const
|
|
</pre>
|
|
|
|
Returns <a href='undocumented#Pixel'>pixel</a> row count.
|
|
|
|
### Return Value
|
|
|
|
<a href='undocumented#Pixel'>pixel</a> height
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="72c35baaeddca1d912edf93d19429c8e"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_width'>width</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_height'>height</a> <a href='undocumented#SkPixelRef'>SkPixelRef</a>::<a href='#SkPixelRef_height'>height</a> <a href='SkImage_Reference#SkImage'>SkImage</a>::<a href='#SkImage_height'>height</a> <a href='SkSurface_Reference#SkSurface'>SkSurface</a>::<a href='#SkSurface_height'>height</a>
|
|
|
|
<a name='SkImageInfo_colorType'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> <a href='#SkImageInfo_colorType'>colorType</a>() const
|
|
</pre>
|
|
|
|
Returns <a href='#Image_Info_Color_Type'>Color_Type</a>, one of: <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
.
|
|
|
|
### Return Value
|
|
|
|
<a href='#Image_Info_Color_Type'>Color_Type</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="06ecc3ce7f35cc7f930cbc2a662e3105">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
color type: kAlpha_8_SkColorType
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_alphaType'>alphaType</a> <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>::<a href='#SkPixmap_colorType'>colorType</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_colorType'>colorType</a>
|
|
|
|
<a name='SkImageInfo_alphaType'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> <a href='#SkImageInfo_alphaType'>alphaType</a>() const
|
|
</pre>
|
|
|
|
Returns <a href='#Image_Info_Alpha_Type'>Alpha_Type</a>, one of: <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
|
|
<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
|
|
.
|
|
|
|
### Return Value
|
|
|
|
<a href='#Image_Info_Alpha_Type'>Alpha_Type</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="5c1d2499a4056b6cff38c1cf924158a1">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
alpha type: kPremul_SkAlphaType
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_colorType'>colorType</a> <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>::<a href='#SkPixmap_alphaType'>alphaType</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_alphaType'>alphaType</a>
|
|
|
|
<a name='SkImageInfo_colorSpace'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='undocumented#SkColorSpace'>SkColorSpace</a>* <a href='#SkImageInfo_colorSpace'>colorSpace</a>() const
|
|
</pre>
|
|
|
|
Returns <a href='undocumented#SkColorSpace'>SkColorSpace</a>, the range of colors. The reference count of
|
|
<a href='undocumented#SkColorSpace'>SkColorSpace</a> is unchanged. The returned <a href='undocumented#SkColorSpace'>SkColorSpace</a> is immutable.
|
|
|
|
### Return Value
|
|
|
|
<a href='undocumented#SkColorSpace'>SkColorSpace</a>, or nullptr
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="5602b816d7cf75e3851274ef36a4c10f"><div><a href='undocumented#SkColorSpace'>SkColorSpace</a>::<a href='#SkColorSpace_MakeSRGBLinear'>MakeSRGBLinear</a> creates <a href='#Color_Space'>Color_Space</a> with linear gamma
|
|
and an sRGB gamut. This <a href='#Color_Space'>Color_Space</a> gamma is not close to sRGB gamma.
|
|
</div>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
gammaCloseToSRGB: false gammaIsLinear: true isSRGB: false
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Color_Space'>Color_Space</a> <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>::<a href='#SkPixmap_colorSpace'>colorSpace</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_colorSpace'>colorSpace</a>
|
|
|
|
<a name='SkImageInfo_refColorSpace'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> <a href='#SkImageInfo_refColorSpace'>refColorSpace</a>() const
|
|
</pre>
|
|
|
|
Returns smart pointer to <a href='undocumented#SkColorSpace'>SkColorSpace</a>, the range of colors. The smart pointer
|
|
tracks the number of objects sharing this <a href='undocumented#SkColorSpace'>SkColorSpace</a> reference so the memory
|
|
is released when the owners destruct.
|
|
|
|
The returned <a href='undocumented#SkColorSpace'>SkColorSpace</a> is immutable.
|
|
|
|
### Return Value
|
|
|
|
<a href='undocumented#SkColorSpace'>SkColorSpace</a> wrapped in a smart pointer
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="33f65524736736fd91802b4198ba6fa8"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Color_Space'>Color_Space</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_refColorSpace'>refColorSpace</a>
|
|
|
|
<a name='SkImageInfo_isEmpty'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkImageInfo_isEmpty'>isEmpty</a>() const
|
|
</pre>
|
|
|
|
Returns if <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> describes an empty area of pixels by checking if either
|
|
width or height is zero or smaller.
|
|
|
|
### Return Value
|
|
|
|
true if either dimension is zero or smaller
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="b8757200da5be0b43763cf79feb681a7">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
width: 0 height: 0 empty: true
|
|
width: 0 height: 2 empty: true
|
|
width: 2 height: 0 empty: true
|
|
width: 2 height: 2 empty: false
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_dimensions'>dimensions</a> <a href='#SkImageInfo_bounds'>bounds</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_empty'>empty</a> <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>::<a href='#SkPixmap_bounds'>bounds</a>
|
|
|
|
<a name='SkImageInfo_isOpaque'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkImageInfo_isOpaque'>isOpaque</a>() const
|
|
</pre>
|
|
|
|
Returns true if <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> is set to hint that all pixels are opaque; their
|
|
<a href='SkColor_Reference#Alpha'>alpha</a> value is implicitly or explicitly 1.0. If true, and all pixels are
|
|
not opaque, Skia may draw incorrectly.
|
|
|
|
Does not check if <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> allows <a href='SkColor_Reference#Alpha'>alpha</a>, or if any <a href='undocumented#Pixel'>pixel</a> value has
|
|
transparency.
|
|
|
|
### Return Value
|
|
|
|
true if <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> is <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e9bd4f02b6cfb3ac864cb7fee7d7299c">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
isOpaque: false
|
|
isOpaque: false
|
|
isOpaque: true
|
|
isOpaque: true
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#Color_Alpha'>Color_Alpha</a> <a href='SkImageInfo_Reference#SkColorTypeValidateAlphaType'>SkColorTypeValidateAlphaType</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_isOpaque'>isOpaque</a> <a href='SkImage_Reference#SkImage'>SkImage</a>::<a href='#SkImage_isOpaque'>isOpaque</a> <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>::<a href='#SkPixmap_isOpaque'>isOpaque</a>
|
|
|
|
<a name='SkImageInfo_dimensions'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='undocumented#SkISize'>SkISize</a> <a href='#SkImageInfo_dimensions'>dimensions()</a> const
|
|
</pre>
|
|
|
|
Returns <a href='undocumented#SkISize'>SkISize</a> { <a href='#SkImageInfo_width'>width()</a>, <a href='#SkImageInfo_height'>height()</a> }.
|
|
|
|
### Return Value
|
|
|
|
integral <a href='undocumented#Size'>size</a> of <a href='#SkImageInfo_width'>width()</a> and <a href='#SkImageInfo_height'>height()</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="d5547cd2b302822aa85b7b0ae3f48458">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
dimensionsAsBounds == bounds
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_width'>width</a> <a href='#SkImageInfo_height'>height</a> <a href='#SkImageInfo_bounds'>bounds</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_dimensions'>dimensions</a>
|
|
|
|
<a name='SkImageInfo_bounds'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkIRect_Reference#SkIRect'>SkIRect</a> <a href='#SkImageInfo_bounds'>bounds()</a> const
|
|
</pre>
|
|
|
|
Returns <a href='SkIRect_Reference#SkIRect'>SkIRect</a> { 0, 0, <a href='#SkImageInfo_width'>width()</a>, <a href='#SkImageInfo_height'>height()</a> }.
|
|
|
|
### Return Value
|
|
|
|
integral rectangle from origin to <a href='#SkImageInfo_width'>width()</a> and <a href='#SkImageInfo_height'>height()</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="a818be8945cd0c18f99ffe53e90afa48"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_width'>width</a> <a href='#SkImageInfo_height'>height</a> <a href='#SkImageInfo_dimensions'>dimensions</a>
|
|
|
|
<a name='SkImageInfo_gammaCloseToSRGB'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool <a href='#SkImageInfo_gammaCloseToSRGB'>gammaCloseToSRGB</a>() const
|
|
</pre>
|
|
|
|
Returns true if associated <a href='#Color_Space'>Color_Space</a> is not nullptr, and <a href='#Color_Space'>Color_Space</a> gamma
|
|
is approximately the same as sRGB.
|
|
This includes the
|
|
<a href='https://en.wikipedia.org/wiki/SRGB#The_sRGB_transfer_function_(%22gamma%22)'>sRGB transfer function</a></a> as well as a gamma <a href='undocumented#Curve'>curve</a> described by a 2.2 exponent.
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#Color_Space'>Color_Space</a> gamma is approximately the same as sRGB
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="22df72732e898a11773fbfe07388a546"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='undocumented#SkColorSpace'>SkColorSpace</a>::<a href='#SkColorSpace_gammaCloseToSRGB'>gammaCloseToSRGB</a>
|
|
|
|
<a name='SkImageInfo_makeWH'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeWH'>makeWH</a>(int newWidth, int newHeight) const
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with the same <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>, <a href='undocumented#SkColorSpace'>SkColorSpace</a>, and <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>,
|
|
with dimensions set to width and height.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_makeWH_newWidth'><code><strong>newWidth</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> column count; must be zero or greater</td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_makeWH_newHeight'><code><strong>newHeight</strong></code></a></td>
|
|
<td><a href='undocumented#Pixel'>pixel</a> row count; must be zero or greater</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="cd203a3f9c5fb68272f21f302dd54fbc"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_Make'>Make</a> <a href='#SkImageInfo_makeAlphaType'>makeAlphaType</a> <a href='#SkImageInfo_makeColorSpace'>makeColorSpace</a> <a href='#SkImageInfo_makeColorType'>makeColorType</a>
|
|
|
|
<a name='SkImageInfo_makeAlphaType'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeAlphaType'>makeAlphaType</a>(<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> newAlphaType) const
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with same <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>, <a href='undocumented#SkColorSpace'>SkColorSpace</a>, width, and height,
|
|
with <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> set to <a href='#SkImageInfo_makeAlphaType_newAlphaType'>newAlphaType</a>.
|
|
|
|
Created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> contains <a href='#SkImageInfo_makeAlphaType_newAlphaType'>newAlphaType</a> even if it is incompatible with
|
|
<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>, in which case <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a> in <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> is ignored.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_makeAlphaType_newAlphaType'><code><strong>newAlphaType</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>, <a href='SkImageInfo_Reference#kOpaque_SkAlphaType'>kOpaque_SkAlphaType</a>, <a href='SkImageInfo_Reference#kPremul_SkAlphaType'>kPremul_SkAlphaType</a>,
|
|
<a href='SkImageInfo_Reference#kUnpremul_SkAlphaType'>kUnpremul_SkAlphaType</a>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e72db006f1bea26feceaef8727ff9818"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_Make'>Make</a> <a href='#SkImageInfo_MakeA8'>MakeA8</a> <a href='#SkImageInfo_makeColorType'>makeColorType</a> <a href='#SkImageInfo_makeColorSpace'>makeColorSpace</a>
|
|
|
|
<a name='SkImageInfo_makeColorType'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeColorType'>makeColorType</a>(<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> newColorType) const
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with same <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>, <a href='undocumented#SkColorSpace'>SkColorSpace</a>, width, and height,
|
|
with <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a> set to <a href='#SkImageInfo_makeColorType_newColorType'>newColorType</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_makeColorType_newColorType'><code><strong>newColorType</strong></code></a></td>
|
|
<td>one of:</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>, <a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="3ac267b08b12dc83c95f91d8dd5d70ee"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_Make'>Make</a> <a href='#SkImageInfo_makeAlphaType'>makeAlphaType</a> <a href='#SkImageInfo_makeColorSpace'>makeColorSpace</a>
|
|
|
|
<a name='SkImageInfo_makeColorSpace'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
<a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> <a href='#SkImageInfo_makeColorSpace'>makeColorSpace</a>(<a href='undocumented#sk_sp'>sk_sp</a><<a href='undocumented#SkColorSpace'>SkColorSpace</a>> cs) const
|
|
</pre>
|
|
|
|
Creates <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with same <a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>, width, and height,
|
|
with <a href='undocumented#SkColorSpace'>SkColorSpace</a> set to <a href='#SkImageInfo_makeColorSpace_cs'>cs</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_makeColorSpace_cs'><code><strong>cs</strong></code></a></td>
|
|
<td>range of colors; may be nullptr</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
created <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="fe3c5a755d3dde29bba058a583f18901"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_Make'>Make</a> <a href='#SkImageInfo_MakeS32'>MakeS32</a> <a href='#SkImageInfo_makeAlphaType'>makeAlphaType</a> <a href='#SkImageInfo_makeColorType'>makeColorType</a>
|
|
|
|
<a name='SkImageInfo_bytesPerPixel'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a>() const
|
|
</pre>
|
|
|
|
Returns number of bytes per <a href='undocumented#Pixel'>pixel</a> required by <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>.
|
|
Returns zero if <a href='#SkImageInfo_colorType'>colorType</a>( is <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>.
|
|
|
|
### Return Value
|
|
|
|
bytes in <a href='undocumented#Pixel'>pixel</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9b6de4a07b2316228e9340e5a3b82134"><a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
color: kUnknown_SkColorType bytesPerPixel: 0
|
|
color: kAlpha_8_SkColorType bytesPerPixel: 1
|
|
color: kRGB_565_SkColorType bytesPerPixel: 2
|
|
color: kARGB_4444_SkColorType bytesPerPixel: 2
|
|
color: kRGBA_8888_SkColorType bytesPerPixel: 4
|
|
color: kRGB_888x_SkColorType bytesPerPixel: 4
|
|
color: kBGRA_8888_SkColorType bytesPerPixel: 4
|
|
color: kRGBA_1010102_SkColorType bytesPerPixel: 4
|
|
color: kRGB_101010x_SkColorType bytesPerPixel: 4
|
|
color: kGray_8_SkColorType bytesPerPixel: 1
|
|
color: kRGBA_F16_SkColorType bytesPerPixel: 8
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_width'>width</a> <a href='#SkImageInfo_shiftPerPixel'>shiftPerPixel</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_bytesPerPixel'>bytesPerPixel</a>
|
|
|
|
<a name='SkImageInfo_shiftPerPixel'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
int <a href='#SkImageInfo_shiftPerPixel'>shiftPerPixel</a>() const
|
|
</pre>
|
|
|
|
Returns bit shift converting row bytes to row pixels.
|
|
Returns zero for <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>.
|
|
|
|
### Return Value
|
|
|
|
one of: 0, 1, 2, 3; left shift to convert pixels to bytes
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="e47b911f94fc629f756a829e523a2a89"><a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kAlpha_8_SkColorType'>kAlpha_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_565_SkColorType'>kRGB_565_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kARGB_4444_SkColorType'>kARGB_4444_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_8888_SkColorType'>kRGBA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_888x_SkColorType'>kRGB_888x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kBGRA_8888_SkColorType'>kBGRA_8888_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_1010102_SkColorType'>kRGBA_1010102_SkColorType</a>, <a href='SkImageInfo_Reference#kRGB_101010x_SkColorType'>kRGB_101010x_SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#kGray_8_SkColorType'>kGray_8_SkColorType</a>, <a href='SkImageInfo_Reference#kRGBA_F16_SkColorType'>kRGBA_F16_SkColorType</a>
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
color: kUnknown_SkColorType shiftPerPixel: 0
|
|
color: kAlpha_8_SkColorType shiftPerPixel: 0
|
|
color: kRGB_565_SkColorType shiftPerPixel: 1
|
|
color: kARGB_4444_SkColorType shiftPerPixel: 1
|
|
color: kRGBA_8888_SkColorType shiftPerPixel: 2
|
|
color: kRGB_888x_SkColorType shiftPerPixel: 2
|
|
color: kBGRA_8888_SkColorType shiftPerPixel: 2
|
|
color: kRGBA_1010102_SkColorType shiftPerPixel: 2
|
|
color: kRGB_101010x_SkColorType shiftPerPixel: 2
|
|
color: kGray_8_SkColorType shiftPerPixel: 0
|
|
color: kRGBA_F16_SkColorType shiftPerPixel: 3
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a> <a href='#SkImageInfo_minRowBytes'>minRowBytes</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_shiftPerPixel'>shiftPerPixel</a> <a href='SkPixmap_Reference#SkPixmap'>SkPixmap</a>::<a href='#SkPixmap_shiftPerPixel'>shiftPerPixel</a>
|
|
|
|
<a name='SkImageInfo_minRowBytes64'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
uint64_t <a href='#SkImageInfo_minRowBytes64'>minRowBytes64</a>() const
|
|
</pre>
|
|
|
|
Returns minimum bytes per row, computed from <a href='undocumented#Pixel'>pixel</a> <a href='#SkImageInfo_width'>width()</a> and <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>, which
|
|
specifies <a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a>(). <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a> maximum value for row bytes must fit
|
|
in 31 bits.
|
|
|
|
### Return Value
|
|
|
|
<a href='#SkImageInfo_width'>width()</a> times <a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a>() as unsigned 64-bit integer
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="4b5d3904476726a39f1c3e276d6b6ba7">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
RGBA_F16 width 16777216 (0x01000000) OK
|
|
RGBA_F16 width 33554432 (0x02000000) OK
|
|
RGBA_F16 width 67108864 (0x04000000) OK
|
|
RGBA_F16 width 134217728 (0x08000000) OK
|
|
RGBA_F16 width 268435456 (0x10000000) too large
|
|
RGBA_F16 width 536870912 (0x20000000) too large
|
|
RGBA_F16 width 1073741824 (0x40000000) too large
|
|
RGBA_F16 width -2147483648 (0x80000000) too large
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_minRowBytes'>minRowBytes</a> <a href='#SkImageInfo_computeByteSize'>computeByteSize</a> <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a> <a href='#SkImageInfo_validRowBytes'>validRowBytes</a>
|
|
|
|
<a name='SkImageInfo_minRowBytes'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
size_t <a href='#SkImageInfo_minRowBytes'>minRowBytes</a>() const
|
|
</pre>
|
|
|
|
Returns minimum bytes per row, computed from <a href='undocumented#Pixel'>pixel</a> <a href='#SkImageInfo_width'>width()</a> and <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>, which
|
|
specifies <a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a>(). <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a> maximum value for row bytes must fit
|
|
in 31 bits.
|
|
|
|
### Return Value
|
|
|
|
<a href='#SkImageInfo_width'>width()</a> times <a href='#SkImageInfo_bytesPerPixel'>bytesPerPixel</a>() as signed 32-bit integer
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="897230ecfb36095486beca324fd369f9">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
RGBA_F16 width 16777216 (0x01000000) OK
|
|
RGBA_F16 width 33554432 (0x02000000) OK
|
|
RGBA_F16 width 67108864 (0x04000000) OK
|
|
RGBA_F16 width 134217728 (0x08000000) OK
|
|
RGBA_F16 width 268435456 (0x10000000) too large
|
|
RGBA_F16 width 536870912 (0x20000000) too large
|
|
RGBA_F16 width 1073741824 (0x40000000) too large
|
|
RGBA_F16 width -2147483648 (0x80000000) too large
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_minRowBytes64'>minRowBytes64</a> <a href='#SkImageInfo_computeByteSize'>computeByteSize</a> <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a> <a href='#SkImageInfo_validRowBytes'>validRowBytes</a>
|
|
|
|
<a name='SkImageInfo_computeOffset'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
size_t <a href='#SkImageInfo_computeOffset'>computeOffset</a>(int x, int y, size_t rowBytes) const
|
|
</pre>
|
|
|
|
Returns byte offset of <a href='undocumented#Pixel'>pixel</a> from <a href='undocumented#Pixel'>pixel</a> base address.
|
|
|
|
Asserts in debug build if <a href='#SkImageInfo_computeOffset_x'>x</a> or <a href='#SkImageInfo_computeOffset_y'>y</a> is outside of bounds. Does not assert if
|
|
<a href='#SkImageInfo_computeOffset_rowBytes'>rowBytes</a> is smaller than <a href='#SkImageInfo_minRowBytes'>minRowBytes</a>(), even though result may be incorrect.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_computeOffset_x'><code><strong>x</strong></code></a></td>
|
|
<td>column index, zero or greater, and less than <a href='#SkImageInfo_width'>width()</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_computeOffset_y'><code><strong>y</strong></code></a></td>
|
|
<td>row index, zero or greater, and less than <a href='#SkImageInfo_height'>height()</a></td>
|
|
</tr>
|
|
<tr> <td><a name='SkImageInfo_computeOffset_rowBytes'><code><strong>rowBytes</strong></code></a></td>
|
|
<td><a href='undocumented#Size'>size</a> of <a href='undocumented#Pixel'>pixel</a> row or larger</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
offset within <a href='undocumented#Pixel'>pixel</a> array
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="818e4e1191e39d2a642902cbf253b399"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_height'>height</a> <a href='#SkImageInfo_width'>width</a> <a href='#SkImageInfo_minRowBytes'>minRowBytes</a> <a href='#SkImageInfo_computeByteSize'>computeByteSize</a>
|
|
|
|
<a name='SkImageInfo_equal1_operator'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool operator==(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& other) const
|
|
</pre>
|
|
|
|
Compares <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with <a href='#SkImageInfo_equal1_operator_other'>other</a>, and returns true if width, height, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>, and <a href='undocumented#SkColorSpace'>SkColorSpace</a> are equivalent.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_equal1_operator_other'><code><strong>other</strong></code></a></td>
|
|
<td><a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> to compare</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> equals <a href='#SkImageInfo_equal1_operator_other'>other</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="53c212c4f2449df0b0eedbc6227b6ab7">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
info1 != info2
|
|
info1 != info2
|
|
info1 != info2
|
|
info1 == info2
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_notequal1_operator'>operator!=(const SkImageInfo& other)_const</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>::<a href='#SkColorSpace_Equals'>Equals</a>
|
|
|
|
<a name='SkImageInfo_notequal1_operator'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
bool operator!=(const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>& other) const
|
|
</pre>
|
|
|
|
Compares <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with <a href='#SkImageInfo_notequal1_operator_other'>other</a>, and returns true if width, height, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>,
|
|
<a href='SkImageInfo_Reference#SkAlphaType'>SkAlphaType</a>, and <a href='undocumented#SkColorSpace'>SkColorSpace</a> are not equivalent.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_notequal1_operator_other'><code><strong>other</strong></code></a></td>
|
|
<td><a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> to compare</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> is not equal to <a href='#SkImageInfo_notequal1_operator_other'>other</a>
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="8c039fde0a476ac1aa62bf9de5d61c77">
|
|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
info1 != info2
|
|
info1 != info2
|
|
info1 != info2
|
|
info1 == info2
|
|
~~~~
|
|
|
|
</fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_equal1_operator'>operator==(const SkImageInfo& other)_const</a> <a href='undocumented#SkColorSpace'>SkColorSpace</a>::<a href='#SkColorSpace_Equals'>Equals</a>
|
|
|
|
<a name='SkImageInfo_computeByteSize'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
size_t <a href='#SkImageInfo_computeByteSize'>computeByteSize</a>(size_t rowBytes) const
|
|
</pre>
|
|
|
|
Returns storage required by <a href='undocumented#Pixel'>pixel</a> array, given <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> dimensions, <a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>,
|
|
and <a href='#SkImageInfo_computeByteSize_rowBytes'>rowBytes</a>. <a href='#SkImageInfo_computeByteSize_rowBytes'>rowBytes</a> is assumed to be at least as large as <a href='#SkImageInfo_minRowBytes'>minRowBytes</a>().
|
|
|
|
Returns zero if height is zero.
|
|
Returns SIZE_MAX if answer exceeds the range of size_t.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_computeByteSize_rowBytes'><code><strong>rowBytes</strong></code></a></td>
|
|
<td><a href='undocumented#Size'>size</a> of <a href='undocumented#Pixel'>pixel</a> row or larger</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
memory required by <a href='undocumented#Pixel'>pixel</a> buffer
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="9def507d2295f7051effd0c83bb04436"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a> <a href='#SkImageInfo_validRowBytes'>validRowBytes</a>
|
|
|
|
<a name='SkImageInfo_computeMinByteSize'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
size_t <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a>() const
|
|
</pre>
|
|
|
|
Returns storage required by <a href='undocumented#Pixel'>pixel</a> array, given <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> dimensions, and
|
|
<a href='SkImageInfo_Reference#SkColorType'>SkColorType</a>. Uses <a href='#SkImageInfo_minRowBytes'>minRowBytes</a>() to compute bytes for <a href='undocumented#Pixel'>pixel</a> row.
|
|
|
|
Returns zero if height is zero.
|
|
Returns SIZE_MAX if answer exceeds the range of size_t.
|
|
|
|
### Return Value
|
|
|
|
least memory required by <a href='undocumented#Pixel'>pixel</a> buffer
|
|
|
|
### Example
|
|
|
|
<div><fiddle-embed name="fc18640fdde437cb35338aed7c68d399"></fiddle-embed></div>
|
|
|
|
### See Also
|
|
|
|
<a href='#SkImageInfo_computeByteSize'>computeByteSize</a> <a href='#SkImageInfo_validRowBytes'>validRowBytes</a>
|
|
|
|
<a name='SkImageInfo_ByteSizeOverflowed'></a>
|
|
|
|
---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
static bool <a href='#SkImageInfo_ByteSizeOverflowed'>ByteSizeOverflowed</a>(size_t byteSize)
|
|
</pre>
|
|
|
|
Returns true if <a href='#SkImageInfo_ByteSizeOverflowed_byteSize'>byteSize</a> equals SIZE_MAX. <a href='#SkImageInfo_computeByteSize'>computeByteSize</a>() and
|
|
<a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a>() return SIZE_MAX if size_t can not hold buffer <a href='undocumented#Size'>size</a>.
|
|
|
|
### Parameters
|
|
|
|
<table> <tr> <td><a name='SkImageInfo_ByteSizeOverflowed_byteSize'><code><strong>byteSize</strong></code></a></td>
|
|
<td>result of <a href='#SkImageInfo_computeByteSize'>computeByteSize</a>() or <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a>()</td>
|
|
</tr>
|
|
</table>
|
|
|
|
### Return Value
|
|
|
|
true if <a href='#SkImageInfo_computeByteSize'>computeByteSize</a>() or <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a>() result exceeds size_t
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### Example
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<div><fiddle-embed name="6a63dfdd62ab77ff57783af8c33d7b78">
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#### Example Output
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~~~~
|
|
rowBytes:100000000 size:99999999900000008 overflowed:false
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|
rowBytes:1000000000 size:999999999000000008 overflowed:false
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rowBytes:10000000000 size:9999999990000000008 overflowed:false
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rowBytes:100000000000 size:18446744073709551615 overflowed:true
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rowBytes:1000000000000 size:18446744073709551615 overflowed:true
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~~~~
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</fiddle-embed></div>
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### See Also
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<a href='#SkImageInfo_computeByteSize'>computeByteSize</a> <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a> <a href='#SkImageInfo_validRowBytes'>validRowBytes</a>
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<a name='SkImageInfo_validRowBytes'></a>
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---
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<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
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bool <a href='#SkImageInfo_validRowBytes'>validRowBytes</a>(size_t rowBytes) const
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</pre>
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Returns true if <a href='#SkImageInfo_validRowBytes_rowBytes'>rowBytes</a> is smaller than width times <a href='undocumented#Pixel'>pixel</a> <a href='undocumented#Size'>size</a>.
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### Parameters
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<table> <tr> <td><a name='SkImageInfo_validRowBytes_rowBytes'><code><strong>rowBytes</strong></code></a></td>
|
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<td><a href='undocumented#Size'>size</a> of <a href='undocumented#Pixel'>pixel</a> row or larger</td>
|
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</tr>
|
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</table>
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### Return Value
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|
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true if <a href='#SkImageInfo_validRowBytes_rowBytes'>rowBytes</a> is large enough to contain <a href='undocumented#Pixel'>pixel</a> row
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|
|
### Example
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|
|
|
<div><fiddle-embed name="c6b0f6a3f493cb08d9abcdefe12de245">
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|
|
#### Example Output
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|
|
|
~~~~
|
|
validRowBytes(60): false
|
|
validRowBytes(64): true
|
|
validRowBytes(68): true
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~~~~
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</fiddle-embed></div>
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### See Also
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|
|
|
<a href='#SkImageInfo_ByteSizeOverflowed'>ByteSizeOverflowed</a> <a href='#SkImageInfo_computeByteSize'>computeByteSize</a> <a href='#SkImageInfo_computeMinByteSize'>computeMinByteSize</a>
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|
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<a name='SkImageInfo_reset'></a>
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|
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---
|
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|
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<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkImageInfo_reset'>reset()</a>
|
|
</pre>
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Creates an empty <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a> with <a href='SkImageInfo_Reference#kUnknown_SkColorType'>kUnknown_SkColorType</a>, <a href='SkImageInfo_Reference#kUnknown_SkAlphaType'>kUnknown_SkAlphaType</a>,
|
|
a width and height of zero, and no <a href='undocumented#SkColorSpace'>SkColorSpace</a>.
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|
|
### Example
|
|
|
|
<div><fiddle-embed name="ab7e73786805c936de386b6c1ebe1f13">
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|
|
|
#### Example Output
|
|
|
|
~~~~
|
|
info == copy
|
|
info != reset copy
|
|
SkImageInfo() == reset copy
|
|
~~~~
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|
|
</fiddle-embed></div>
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### See Also
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|
|
|
<a href='#SkImageInfo_empty_constructor'>SkImageInfo()</a>
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|
|
|
<a name='Utility'></a>
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|
|
|
<a name='SkImageInfo_validate'></a>
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|
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---
|
|
|
|
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
|
|
void <a href='#SkImageInfo_validate'>validate()</a> const
|
|
</pre>
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### See Also
|
|
|
|
<a href='#SkImageInfo_validRowBytes'>validRowBytes</a> <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>::<a href='#SkBitmap_validate'>validate</a>
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