SkPaint Reference === # Paint # Class SkPaint Paint controls options applied when drawing and measuring. Paint collects all options outside of the Canvas Clip and Canvas Matrix. Various options apply to text, strokes and fills, and images. Some options may not be implemented on all platforms; in these cases, setting the option has no effect. Some options are conveniences that duplicate Canvas functionality; for instance, text size is identical to matrix scale. Paint options are rarely exclusive; each option modifies a stage of the drawing pipeline and multiple pipeline stages may be affected by a single Paint. Paint collects effects and filters that describe single-pass and multiple-pass algorithms that alter the drawing geometry, color, and transparency. For instance, Paint does not directly implement dashing or blur, but contains the objects that do so. The objects contained by Paint are opaque, and cannot be edited outside of the Paint to affect it. The implementation is free to defer computations associated with the Paint, or ignore them altogether. For instance, some GPU implementations draw all Path geometries with Anti Aliasing, regardless of how SkPaint::kAntiAlias Flag is set in Paint. Paint describes a single color, a single font, a single image quality, and so on. Multiple colors are drawn either by using multiple paints or with objects like Shader attached to Paint. ## Overview

Topic	Description
Constants	enum and enum class, and their const values
Constructors	functions that construct SkPaint
Functions	global and class member functions
Operators	operator overloading methods
Related Functions	similar member functions grouped together
Struct Declarations	embedded struct members

## Related Function SkPaint global, struct, and class related member functions share a topic.

Topic	Description
Alpha Methods	get and set Alpha
Anti Alias	approximating coverage with transparency
Automatic Hinting	always adjust glyph paths
Blend Mode Methods	get and set Blend Mode
Color Filter Methods	get and set Color Filter
Color Methods	get and set Color
Device Text	increase precision of glyph position
Dither	distributing color error
Draw Looper Methods	get and set Draw Looper
Fake Bold	approximate font styles
Fast Bounds	approximate area required by Paint
Fill Path	make Path from Path Effect, stroking
Filter Quality Methods	get and set Filter Quality
Flags	attributes represented by single bits
Font Embedded Bitmaps	custom sized bitmap Glyphs
Font Metrics	common glyph dimensions
Full Hinting Spacing	glyph spacing affected by hinting
Hinting	glyph outline adjustment
Image Filter Methods	get and set Image Filter
Initializers	constructors and initialization
LCD Text	text relying on the order of RGB stripes
Linear Text	selects text rendering as Glyph or Path
Management	paint copying, moving, comparing
Mask Filter Methods	get and set Mask Filter
Measure Text	width, height, bounds of text
Miter Limit	maximum length of stroked corners
Path Effect Methods	get and set Path Effect
Shader Methods	get and set Shader
Stroke Cap	decorations at ends of open strokes
Stroke Join	decoration at corners of strokes
Stroke Width	thickness perpendicular to geometry
Style	geometry filling, stroking
Style Fill	fill and stroke
Style Hairline	lines and curves with minimal width
Style Stroke	lines and curves with width
Subpixel Text	uses pixel transparency to represent fractional offset
Text Align	text placement relative to position
Text Encoding	text encoded as characters or Glyphs
Text Intercepts	advanced underline, strike through
Text Path	geometry of Glyphs
Text Scale X	text horizontal scale
Text Size	overall height in points
Text Skew X	text horizontal slant
Typeface Methods	get and set Typeface
Utility	rarely called management functions
Vertical Text	orient text from top to bottom

## Constant SkPaint related constants are defined by enum, enum class, #define, const, and constexpr.

Topic	Description
Align	glyph locations relative to text position
Cap	start and end geometry on stroked shapes
Flags	values described by bits and masks
Hinting	level of glyph outline adjustment
Join	corner geometry on stroked shapes
Style	stroke, fill, or both
TextEncoding	character or glyph encoded size
kAlignCount	number of different Text Align values defined
kAllFlags	mask of all Flags
kAntiAlias Flag	mask for setting Anti Alias
kAutoHinting Flag	mask for setting Automatic Hinting
kBevel Join	connects outside edges
kButt Cap	no stroke extension
kCapCount	number of different Stroke Cap values defined
kCenter Align	centers line of glyphs by its width or height
kDefault Cap	equivalent to kButt Cap
kDefault Join	equivalent to kMiter Join
kDither Flag	mask for setting Dither
kEmbeddedBitmapText Flag	mask for setting Font Embedded Bitmaps
kFakeBoldText Flag	mask for setting Fake Bold
kFill Style	set to fill geometry
kFull Hinting	modifies glyph outlines for maximum constrast
kGlyphID TextEncoding	uses two byte words to represent glyph indices
kJoinCount	number of different Stroke Join values defined
kLCDRenderText Flag	mask for setting LCD Text
kLast Cap	largest Stroke Cap value
kLast Join	equivalent to the largest value for Stroke Join
kLeft Align	positions glyph by computed font offset
kLinearText Flag	mask for setting Linear Text
kMiter Join	extends to Miter Limit
kNo Hinting	glyph outlines unchanged
kNormal Hinting	glyph outlines modified to improve constrast
kRight Align	moves lines of glyphs by its width or height
kRound Cap	adds circle
kRound Join	adds circle
kSlight Hinting	minimal modification to improve constrast
kSquare Cap	adds square
kStrokeAndFill Style	sets to stroke and fill geometry
kStroke Style	set to stroke geometry
kStyleCount	number of different Style values defined
kSubpixelText Flag	mask for setting Subpixel Text
kUTF16 TextEncoding	uses two byte words to represent most of Unicode
kUTF32 TextEncoding	uses four byte words to represent all of Unicode
kUTF8 TextEncoding	uses bytes to represent UTF-8 or ASCII
kVerticalText Flag	mask for setting Vertical Text

## Struct SkPaint uses C++ structs to declare the public data structures and interfaces.

Topic	Description
FontMetrics	values computed by Font Manager using Typeface

## Constructor SkPaint can be constructed or initialized by these functions, including C++ class constructors.

Topic	Description
SkPaint()	constructs with default values
SkPaint(SkPaint&& paint)	moves paint without copying it
SkPaint(const SkPaint& paint)	makes a shallow copy
~SkPaint()	decreases Reference Count of owned objects

## Operator SkPaint operators inline class member functions with arithmetic equivalents.

Topic	Description
operator!=(const SkPaint& a, const SkPaint& b)	compares paints for inequality
operator=(SkPaint&& paint)	moves paint without copying it
operator=(const SkPaint& paint)	makes a shallow copy
operator==(const SkPaint& a, const SkPaint& b)	compares paints for equality

## Member Function SkPaint member functions read and modify the structure properties.

Topic	Description
breakText	returns text that fits in a width
canComputeFastBounds	returns true if settings allow for fast bounds computation
computeFastBounds	returns fill bounds for quick reject tests
computeFastStrokeBounds	returns stroke bounds for quick reject tests
containsText	returns if all text corresponds to Glyphs
countText	returns number of Glyphs in text
doComputeFastBounds	returns bounds for quick reject tests
getAlpha	returns Color Alpha, color opacity
getBlendMode	returns Blend Mode, how colors combine with Device
getColor	returns Color Alpha and RGB, one drawing color
getColorFilter	returns Color Filter, how colors are altered
getDrawLooper	returns Draw Looper, multiple layers
getFillPath	returns fill path equivalent to stroke
getFilterQuality	returns Filter Quality, image filtering level
getFlags	returns Flags stored in a bit field
getFontBounds	returns union all glyph bounds
getFontMetrics	returns Typeface metrics scaled by text size
getFontSpacing	returns recommended spacing between lines
getHash	returns a shallow hash for equality checks
getHinting	returns Hinting, glyph outline adjustment level
getImageFilter	returns Image Filter, alter pixels; blur
getMaskFilter	returns Mask Filter, alterations to Mask Alpha
getPathEffect	returns Path Effect, modifications to path geometry; dashing
getPosTextHIntercepts	returns where lines intersect horizontally positioned text; underlines
getPosTextIntercepts	returns where lines intersect positioned text; underlines
getPosTextPath	returns Path equivalent to positioned text
getShader	returns Shader, multiple drawing colors; gradients
getStrokeCap	returns Cap, the area drawn at path ends
getStrokeJoin	returns Join, geometry on path corners
getStrokeMiter	returns Miter Limit, angles with sharp corners
getStrokeWidth	returns thickness of the stroke
getStyle	returns Style: stroke, fill, or both
getTextAlign	returns Align: left, center, or right
getTextBlobIntercepts	returns where lines intersect Text Blob; underlines
getTextEncoding	returns character or glyph encoded size
getTextIntercepts	returns where lines intersect text; underlines
getTextPath	returns Path equivalent to text
getTextScaleX	returns the text horizontal scale; condensed text
getTextSize	returns text size in points
getTextSkewX	returns the text horizontal skew; oblique text
getTextWidths	returns advance and bounds for each glyph in text
getTypeface	returns Typeface, font description
glyphsToUnichars	converts Glyphs into text
isAntiAlias	returns true if Anti Alias is set
isAutohinted	returns true if Glyphs are always hinted
isDither	returns true if Dither is set
isEmbeddedBitmapText	returns true if Font Embedded Bitmaps is set
isFakeBoldText	returns true if Fake Bold is set
isLCDRenderText	returns true if LCD Text is set
isLinearText	returns true if text is converted to Path
isSrcOver	returns true if Blend Mode is SkBlendMode::kSrcOver
isSubpixelText	returns true if Subpixel Text is set
isVerticalText	returns true if Vertical Text is set
measureText	returns advance width and bounds of text
nothingToDraw	returns true if Paint prevents all drawing
refColorFilter	references Color Filter, how colors are altered
refDrawLooper	references Draw Looper, multiple layers
refImageFilter	references Image Filter, alter pixels; blur
refMaskFilter	references Mask Filter, alterations to Mask Alpha
refPathEffect	references Path Effect, modifications to path geometry; dashing
refShader	references Shader, multiple drawing colors; gradients
refTypeface	references Typeface, font description
reset	sets to default values
setARGB	sets color by component
setAlpha	sets Color Alpha, color opacity
setAntiAlias	sets or clears Anti Alias
setAutohinted	sets Glyphs to always be hinted
setBlendMode	sets Blend Mode, how colors combine with destination
setColor	sets Color Alpha and RGB, one drawing color
setColorFilter	sets Color Filter, alters color
setDither	sets or clears Dither
setDrawLooper	sets Draw Looper, multiple layers
setEmbeddedBitmapText	sets or clears Font Embedded Bitmaps
setFakeBoldText	sets or clears Fake Bold
setFilterQuality	sets Filter Quality, the image filtering level
setFlags	sets multiple Flags in a bit field
setHinting	sets Hinting, glyph outline adjustment level
setImageFilter	sets Image Filter, alter pixels; blur
setLCDRenderText	sets or clears LCD Text
setLinearText	converts to Path before draw or measure
setMaskFilter	sets Mask Filter, alterations to Mask Alpha
setPathEffect	sets Path Effect, modifications to path geometry; dashing
setShader	sets Shader, multiple drawing colors; gradients
setStrokeCap	sets Cap, the area drawn at path ends
setStrokeJoin	sets Join, geometry on path corners
setStrokeMiter	sets Miter Limit, angles with sharp corners
setStrokeWidth	sets thickness of the stroke
setStyle	sets Style: stroke, fill, or both
setSubpixelText	sets or clears Subpixel Text
setTextAlign	sets Align: left, center, or right
setTextEncoding	sets character or glyph encoded size
setTextScaleX	sets the text horizontal scale; condensed text
setTextSize	sets text size in points
setTextSkewX	sets the text horizontal skew; oblique text
setTypeface	sets Typeface, font description
setVerticalText	sets or clears Vertical Text
textToGlyphs	converts text into glyph indices

## Initializers ## SkPaint

SkPaint()

Constructs Paint with default values. | attribute | default value | | --- | --- | | Anti Alias | false | | Blend Mode | SkBlendMode::kSrcOver | | Color | SK ColorBLACK | | Color Alpha | 255 | | Color Filter | nullptr | | Dither | false | | Draw Looper | nullptr | | Fake Bold | false | | Filter Quality | kNone_SkFilterQuality | | Font Embedded Bitmaps | false | | Automatic Hinting | false | | Full Hinting Spacing | false | | Hinting | kNormal Hinting | | Image Filter | nullptr | | LCD Text | false | | Linear Text | false | | Miter Limit | 4 | | Mask Filter | nullptr | | Path Effect | nullptr | | Shader | nullptr | | Style | kFill Style | | Text Align | kLeft Align | | Text Encoding | kUTF8 TextEncoding | | Text Scale X | 1 | | Text Size | 12 | | Text Skew X | 0 | | Typeface | nullptr | | Stroke Cap | kButt Cap | | Stroke Join | kMiter Join | | Stroke Width | 0 | | Subpixel Text | false | | Vertical Text | false | The flags, text size, hinting, and miter limit may be overridden at compile time by defining paint default values. The overrides may be included in "SkUserConfig.h" or predefined by the build system. ### Return Value default initialized Paint ### Example

--- ## SkPaint

SkPaint(const SkPaint& paint)

Makes a shallow copy of Paint. Typeface, Path Effect, Shader, Mask Filter, Color Filter, Draw Looper, and Image Filter are shared between the original paint and the copy. Objects containing Reference Count increment their references by one. The referenced objects Path Effect, Shader, Mask Filter, Color Filter, Draw Looper, and Image Filter cannot be modified after they are created. This prevents objects with Reference Count from being modified once Paint refers to them. ### Parameters

paint original to copy

### Return Value shallow copy of paint ### Example

#### Example Output ~~~~ SK_ColorRED == paint1.getColor() SK_ColorBLUE == paint2.getColor() ~~~~

--- ## SkPaint

SkPaint(SkPaint&& paint)

Implements a move constructor to avoid increasing the reference counts of objects referenced by the paint. After the call, paint is undefined, and can be safely destructed. ### Parameters

paint original to move

### Return Value content of paint ### Example

#### Example Output ~~~~ path effect unique: true ~~~~

--- ## reset

void reset()

Sets all Paint contents to their initial values. This is equivalent to replacing Paint with the result of SkPaint(). ### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## ~SkPaint

~SkPaint()

Decreases Paint Reference Count of owned objects: Typeface, Path Effect, Shader, Mask Filter, Color Filter, Draw Looper, and Image Filter. If the objects containing Reference Count go to zero, they are deleted. --- ## Management ## operator=

SkPaint& operator=(const SkPaint& paint)

Makes a shallow copy of Paint. Typeface, Path Effect, Shader, Mask Filter, Color Filter, Draw Looper, and Image Filter are shared between the original paint and the copy. Objects containing Reference Count in the prior destination are decreased by one, and the referenced objects are deleted if the resulting count is zero. Objects containing Reference Count in the parameter paint are increased by one. paint is unmodified. ### Parameters

paint original to copy

### Return Value content of paint ### Example

#### Example Output ~~~~ SK_ColorRED == paint1.getColor() SK_ColorRED == paint2.getColor() ~~~~

--- ## operator=

SkPaint& operator=(SkPaint&& paint)

Moves the paint to avoid increasing the reference counts of objects referenced by the paint parameter. Objects containing Reference Count in the prior destination are decreased by one; those objects are deleted if the resulting count is zero. After the call, paint is undefined, and can be safely destructed. ### Parameters

paint original to move

### Return Value content of paint ### Example

#### Example Output ~~~~ SK_ColorRED == paint2.getColor() ~~~~

--- ## operator==

bool operator==(const SkPaint& a, const SkPaint& b)

Compares a and b, and returns true if a and b are equivalent. May return false if Typeface, Path Effect, Shader, Mask Filter, Color Filter, Draw Looper, or Image Filter have identical contents but different pointers. ### Parameters

`a`	Paint to compare
`b`	Paint to compare

### Return Value true if Paint pair are equivalent ### Example

#### Example Output ~~~~ paint1 == paint2 paint1 != paint2 ~~~~

### See Also operator!=(const SkPaint& a, const SkPaint& b) --- ## operator!=

bool operator!=(const SkPaint& a, const SkPaint& b)

Compares a and b, and returns true if a and b are not equivalent. May return true if Typeface, Path Effect, Shader, Mask Filter, Color Filter, Draw Looper, or Image Filter have identical contents but different pointers. ### Parameters

`a`	Paint to compare
`b`	Paint to compare

### Return Value true if Paint pair are not equivalent ### Example

#### Example Output ~~~~ paint1 == paint2 paint1 == paint2 ~~~~

### See Also operator==(const SkPaint& a, const SkPaint& b) --- ## getHash

uint32_t getHash() const

Returns a hash generated from Paint values and pointers. Identical hashes guarantee that the paints are equivalent, but differing hashes do not guarantee that the paints have differing contents. If operator==(const SkPaint& a, const SkPaint& b) returns true for two paints, their hashes are also equal. The hash returned is platform and implementation specific. ### Return Value a shallow hash ### Example

#### Example Output ~~~~ paint1 == paint2 paint1.getHash() == paint2.getHash() ~~~~

--- ## Hinting ## Enum SkPaint::Hinting

    enum Hinting {
        kNo Hinting            = 0,
        kSlight Hinting        = 1,
        kNormal Hinting        = 2,
        kFull Hinting          = 3,
    };

Hinting adjusts the glyph outlines so that the shape provides a uniform look at a given point size on font engines that support it. Hinting may have a muted effect or no effect at all depending on the platform. The four levels roughly control corresponding features on platforms that use FreeType as the Font Engine. ### Constants

Const	Value	Description
`SkPaint::kNo_Hinting`	0	Leaves glyph outlines unchanged from their native representation. With FreeType, this is equivalent to the FT_LOAD_NO_HINTING bit-field constant supplied to FT_Load_Glyph, which indicates that the vector outline being loaded should not be fitted to the pixel grid but simply scaled to 26.6 fractional pixels.
`SkPaint::kSlight_Hinting`	1	Modifies glyph outlines minimally to improve constrast. With FreeType, this is equivalent in spirit to the FT_LOAD_TARGET_LIGHT value supplied to FT_Load_Glyph. It chooses a lighter hinting algorithm for non-monochrome modes. Generated Glyphs may be fuzzy but better resemble their original shape.
`SkPaint::kNormal_Hinting`	2	Modifies glyph outlines to improve constrast. This is the default. With FreeType, this supplies FT_LOAD_TARGET_NORMAL to FT_Load_Glyph, choosing the default hinting algorithm, which is optimized for standard gray-level rendering.
`SkPaint::kFull_Hinting`	3	Modifies glyph outlines for maximum constrast. With FreeType, this selects FT_LOAD_TARGET_LCD or FT_LOAD_TARGET_LCD_V if kLCDRenderText Flag is set. FT_LOAD_TARGET_LCD is a variant of FT_LOAD_TARGET_NORMAL optimized for horizontally decimated LCD displays; FT_LOAD_TARGET_LCD_V is a variant of FT_LOAD_TARGET_NORMAL optimized for vertically decimated LCD displays.

On OS X and iOS, hinting controls whether Core Graphics dilates the font outlines to account for LCD text. No hinting uses Core Text Grayscale output. Normal hinting uses Core Text LCD output. If kLCDRenderText Flag is clear, the LCD output is reduced to a single Grayscale channel. On Windows with DirectWrite, Hinting has no effect. Hinting defaults to kNormal Hinting. Set SkPaintDefaults Hinting at compile time to change the default setting. ## getHinting

Hinting getHinting() const

Returns level of glyph outline adjustment. ### Return Value one of: kNo Hinting, kSlight Hinting, kNormal Hinting, kFull Hinting ### Example

#### Example Output ~~~~ SkPaint::kNormal_Hinting == paint.getHinting() ~~~~

--- ## setHinting

void setHinting(Hinting hintingLevel)

Sets level of glyph outline adjustment. Does not check for valid values of hintingLevel. | Hinting | value | effect on generated glyph outlines | | --- | --- | --- | | kNo Hinting | 0 | leaves glyph outlines unchanged from their native representation | | kSlight Hinting | 1 | modifies glyph outlines minimally to improve contrast | | kNormal Hinting | 2 | modifies glyph outlines to improve contrast | | kFull Hinting | 3 | modifies glyph outlines for maximum contrast | ### Parameters

hintingLevel one of: kNo Hinting, kSlight Hinting, kNormal Hinting, kFull Hinting

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## Flags ## Enum SkPaint::Flags

    enum Flags {
        kAntiAlias Flag       = 0x01,
        kDither Flag          = 0x04,
        kFakeBoldText Flag    = 0x20,
        kLinearText Flag      = 0x40,
        kSubpixelText Flag    = 0x80,
        kLCDRenderText Flag   = 0x200,
        kEmbeddedBitmapText Flag = 0x400,
        kAutoHinting Flag     = 0x800,
        kVerticalText Flag    = 0x1000,

        kAllFlags = 0xFFFF,
    };

The bit values stored in Flags. The default value for Flags, normally zero, can be changed at compile time with a custom definition of SkPaintDefaults Flags. All flags can be read and written explicitly; Flags allows manipulating multiple settings at once. ### Constants Flags default to all flags clear, disabling the associated feature.

Const	Value	Description
`SkPaint::kAntiAlias_Flag`	0x0001	mask for setting Anti_Alias
`SkPaint::kDither_Flag`	0x0004	mask for setting Dither
`SkPaint::kFakeBoldText_Flag`	0x0020	mask for setting Fake_Bold
`SkPaint::kLinearText_Flag`	0x0040	mask for setting Linear_Text
`SkPaint::kSubpixelText_Flag`	0x0080	mask for setting Subpixel_Text
`SkPaint::kLCDRenderText_Flag`	0x0200	mask for setting LCD_Text
`SkPaint::kEmbeddedBitmapText_Flag`	0x0400	mask for setting Font_Embedded_Bitmaps
`SkPaint::kAutoHinting_Flag`	0x0800	mask for setting Automatic_Hinting
`SkPaint::kVerticalText_Flag`	0x1000	mask for setting Vertical_Text
`SkPaint::kAllFlags`	0xFFFF	mask of all Flags, including private flags and flags reserved for future use

## Enum SkPaint::ReserveFlags Deprecated. soonOnly valid for Android framework.

    enum ReserveFlags {
        kUnderlineText ReserveFlag   = 0x08,
        kStrikeThruText ReserveFlag  = 0x10,
    };

### Constants

Const	Value	Description
`SkPaint::kUnderlineText_ReserveFlag`	0x0008	Deprecated. soon
`SkPaint::kStrikeThruText_ReserveFlag`	0x0010	Deprecated. soon

## getFlags

uint32_t getFlags() const

Returns paint settings described by Flags. Each setting uses one bit, and can be tested with Flags members. ### Return Value zero, one, or more bits described by Flags ### Example

#### Example Output ~~~~ (SkPaint::kAntiAlias_Flag & paint.getFlags()) != 0 ~~~~

--- ## setFlags

void setFlags(uint32_t flags)

Replaces Flags with flags, the union of the Flags members. All Flags members may be cleared, or one or more may be set. ### Parameters

flags union of Flags for Paint

### Example

#### Example Output ~~~~ paint.isAntiAlias() paint.isDither() ~~~~

--- ## Anti Alias Anti Alias drawing approximates partial pixel coverage with transparency. If kAntiAlias Flag is clear, pixel centers contained by the shape edge are drawn opaque. If kAntiAlias Flag is set, pixels are drawn with Color Alpha equal to their coverage. The rule for Aliased pixels is inconsistent across platforms. A shape edge passing through the pixel center may, but is not required to, draw the pixel. Raster Engine draws Aliased pixels whose centers are on or to the right of the start of an active Path edge, and whose center is to the left of the end of the active Path edge. A platform may only support Anti Aliased drawing. Some GPU-backed platforms use Supersampling to Anti Alias all drawing, and have no mechanism to selectively Alias. The amount of coverage computed for Anti Aliased pixels also varies across platforms. Anti Alias is disabled by default. Anti Alias can be enabled by default by setting SkPaintDefaults Flags to kAntiAlias Flag at compile time. ### Example

A red line is drawn with transparency on the edges to make it look smoother. A blue line draws only where the pixel centers are contained. The lines are drawn into Bitmap, then drawn magnified to make the Aliasing easier to see.

## isAntiAlias

bool isAntiAlias() const

If true, pixels on the active edges of Path may be drawn with partial transparency. Equivalent to getFlags masked with kAntiAlias Flag. ### Return Value kAntiAlias Flag state ### Example

#### Example Output ~~~~ paint.isAntiAlias() == !!(paint.getFlags() & SkPaint::kAntiAlias_Flag) paint.isAntiAlias() == !!(paint.getFlags() & SkPaint::kAntiAlias_Flag) ~~~~

--- ## setAntiAlias

void setAntiAlias(bool aa)

Requests, but does not require, that Path edge pixels draw opaque or with partial transparency. Sets kAntiAlias Flag if aa is true. Clears kAntiAlias Flag if aa is false. ### Parameters

`aa`	setting for kAntiAlias Flag

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## Dither Dither increases fidelity by adjusting the color of adjacent pixels. This can help to smooth color transitions and reducing banding in gradients. Dithering lessens visible banding from kRGB_565_SkColorType and kRGBA_8888_SkColorType gradients, and improves rendering into a kRGB_565_SkColorType Surface. Dithering is always enabled for linear gradients drawing into kRGB_565_SkColorType Surface and kRGBA_8888_SkColorType Surface. Dither cannot be enabled for kAlpha_8_SkColorType Surface and kRGBA_F16_SkColorType Surface. Dither is disabled by default. Dither can be enabled by default by setting SkPaintDefaults Flags to kDither Flag at compile time. Some platform implementations may ignore dithering. SetSK_IGNORE_GPU_DITHERto ignore Dither on GPU Surface. ### Example

Dithering in the bottom half more closely approximates the requested color by alternating nearby colors from pixel to pixel.

### Example

Dithering introduces subtle adjustments to color to smooth gradients. Drawing the gradient repeatedly with SkBlendMode::kPlus exaggerates the dither, making it easier to see.

## isDither

bool isDither() const

If true, color error may be distributed to smooth color transition. Equivalent to getFlags masked with kDither Flag. ### Return Value kDither Flag state ### Example

#### Example Output ~~~~ paint.isDither() == !!(paint.getFlags() & SkPaint::kDither_Flag) paint.isDither() == !!(paint.getFlags() & SkPaint::kDither_Flag) ~~~~

--- ## setDither

void setDither(bool dither)

Requests, but does not require, to distribute color error. Sets kDither Flag if dither is true. Clears kDither Flag if dither is false. ### Parameters

dither setting for kDither Flag

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

### See Also kRGB_565_SkColorType --- ### See Also Gradient kRGB_565_SkColorType ## Device Text LCD Text and Subpixel Text increase the precision of glyph position. When set, Flags kLCDRenderText Flag takes advantage of the organization of RGB stripes that create a color, and relies on the small size of the stripe and visual perception to make the color fringing imperceptible. LCD Text can be enabled on devices that orient stripes horizontally or vertically, and that order the color components as RGB or BGR. Flags kSubpixelText Flag uses the pixel transparency to represent a fractional offset. As the opaqueness of the color increases, the edge of the glyph appears to move towards the outside of the pixel. Either or both techniques can be enabled. kLCDRenderText Flag and kSubpixelText Flag are clear by default. LCD Text or Subpixel Text can be enabled by default by setting SkPaintDefaults Flags to kLCDRenderText Flag or kSubpixelText Flag (or both) at compile time. ### Example

Four commas are drawn normally and with combinations of LCD Text and Subpixel Text. When Subpixel Text is disabled, the comma Glyphs are identical, but not evenly spaced. When Subpixel Text is enabled, the comma Glyphs are unique, but appear evenly spaced.

## Linear Text Linear Text selects whether text is rendered as a Glyph or as a Path. If kLinearText Flag is set, it has the same effect as setting Hinting to kNormal Hinting. If kLinearText Flag is clear, it is the same as setting Hinting to kNo Hinting. ## isLinearText

bool isLinearText() const

If true, text is converted to Path before drawing and measuring. Equivalent to getFlags masked with kLinearText Flag. ### Return Value kLinearText Flag state ### Example

### See Also setLinearText Hinting --- ## setLinearText

void setLinearText(bool linearText)

If true, text is converted to Path before drawing and measuring. By default, kLinearText Flag is clear. Sets kLinearText Flag if linearText is true. Clears kLinearText Flag if linearText is false. ### Parameters

linearText setting for kLinearText Flag

### Example

### See Also isLinearText Hinting --- ## Subpixel Text Flags kSubpixelText Flag uses the pixel transparency to represent a fractional offset. As the opaqueness of the color increases, the edge of the glyph appears to move towards the outside of the pixel. ## isSubpixelText

bool isSubpixelText() const

If true, Glyphs at different sub-pixel positions may differ on pixel edge coverage. Equivalent to getFlags masked with kSubpixelText Flag. ### Return Value kSubpixelText Flag state ### Example

#### Example Output ~~~~ paint.isSubpixelText() == !!(paint.getFlags() & SkPaint::kSubpixelText_Flag) paint.isSubpixelText() == !!(paint.getFlags() & SkPaint::kSubpixelText_Flag) ~~~~

--- ## setSubpixelText

void setSubpixelText(bool subpixelText)

Requests, but does not require, that Glyphs respect sub-pixel positioning. Sets kSubpixelText Flag if subpixelText is true. Clears kSubpixelText Flag if subpixelText is false. ### Parameters

subpixelText setting for kSubpixelText Flag

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## LCD Text When set, Flags kLCDRenderText Flag takes advantage of the organization of RGB stripes that create a color, and relies on the small size of the stripe and visual perception to make the color fringing imperceptible. LCD Text can be enabled on devices that orient stripes horizontally or vertically, and that order the color components as RGB or BGR. ## isLCDRenderText

bool isLCDRenderText() const

If true, Glyphs may use LCD striping to improve glyph edges. Returns true if Flags kLCDRenderText Flag is set. ### Return Value kLCDRenderText Flag state ### Example

#### Example Output ~~~~ paint.isLCDRenderText() == !!(paint.getFlags() & SkPaint::kLCDRenderText_Flag) paint.isLCDRenderText() == !!(paint.getFlags() & SkPaint::kLCDRenderText_Flag) ~~~~

--- ## setLCDRenderText

void setLCDRenderText(bool lcdText)

Requests, but does not require, that Glyphs use LCD striping for glyph edges. Sets kLCDRenderText Flag if lcdText is true. Clears kLCDRenderText Flag if lcdText is false. ### Parameters

lcdText setting for kLCDRenderText Flag

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## Font Embedded Bitmaps Font Embedded Bitmaps allows selecting custom sized bitmap Glyphs. Flags kEmbeddedBitmapText Flag when set chooses an embedded bitmap glyph over an outline contained in a font if the platform supports this option. FreeType selects the bitmap glyph if available when kEmbeddedBitmapText Flag is set, and selects the outline glyph if kEmbeddedBitmapText Flag is clear. Windows may select the bitmap glyph but is not required to do so. OS X and iOS do not support this option. Font Embedded Bitmaps is disabled by default. Font Embedded Bitmaps can be enabled by default by setting SkPaintDefaults Flags to kEmbeddedBitmapText Flag at compile time. ### Example

The "hintgasp" TrueType font in the Skia resources/fonts directory
        includes an embedded bitmap Glyph at odd font sizes. This example works
        on platforms that use FreeType as their Font_Engine.
        Windows may, but is not required to, return a bitmap glyph if
        kEmbeddedBitmapText_Flag is set.SkBitmap bitmap;
    bitmap.allocN32Pixels(30, 15);
    bitmap.eraseColor(0);
    SkCanvas offscreen(bitmap);
    SkPaint paint;
    paint.setAntiAlias(true);
    paint.setTextSize(13);
    paint.setTypeface(MakeResourceAsTypeface("fonts/hintgasp.ttf"));
    for (bool embedded : { false, true}) {
        paint.setEmbeddedBitmapText(embedded);
        offscreen.drawString("A", embedded ? 5 : 15, 15, paint);
    }
    canvas->drawBitmap(bitmap, 0, 0);
    canvas->scale(10, 10);
    canvas->drawBitmap(bitmap, -2, 1);

## isEmbeddedBitmapText

bool isEmbeddedBitmapText() const

If true, Font Engine may return Glyphs from font bitmaps instead of from outlines. Equivalent to getFlags masked with kEmbeddedBitmapText Flag. ### Return Value kEmbeddedBitmapText Flag state ### Example

#### Example Output ~~~~ paint.isEmbeddedBitmapText() == !!(paint.getFlags() & SkPaint::kEmbeddedBitmapText_Flag) paint.isEmbeddedBitmapText() == !!(paint.getFlags() & SkPaint::kEmbeddedBitmapText_Flag) ~~~~

--- ## setEmbeddedBitmapText

void setEmbeddedBitmapText(bool useEmbeddedBitmapText)

Requests, but does not require, to use bitmaps in fonts instead of outlines. Sets kEmbeddedBitmapText Flag if useEmbeddedBitmapText is true. Clears kEmbeddedBitmapText Flag if useEmbeddedBitmapText is false. ### Parameters

useEmbeddedBitmapText setting for kEmbeddedBitmapText Flag

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## Automatic Hinting If Hinting is set to kNormal Hinting or kFull Hinting, Automatic Hinting instructs the Font Manager to always hint Glyphs. Automatic Hinting has no effect if Hinting is set to kNo Hinting or kSlight Hinting. Automatic Hinting only affects platforms that use FreeType as the Font Manager. ## isAutohinted

bool isAutohinted() const

If true, and if Hinting is set to kNormal Hinting or kFull Hinting, and if platform uses FreeType as the Font Manager, instruct the Font Manager to always hint Glyphs. Equivalent to getFlags masked with kAutoHinting Flag. ### Return Value kAutoHinting Flag state ### Example

#### Example Output ~~~~ paint.isAutohinted() == !!(paint.getFlags() & SkPaint::kAutoHinting_Flag) paint.isAutohinted() == !!(paint.getFlags() & SkPaint::kAutoHinting_Flag) ~~~~

### See Also setAutohinted Hinting --- ## setAutohinted

void setAutohinted(bool useAutohinter)

If Hinting is set to kNormal Hinting or kFull Hinting and useAutohinter is set, instruct the Font Manager to always hint Glyphs. Automatic Hinting has no effect if Hinting is set to kNo Hinting or kSlight Hinting. Only affects platforms that use FreeType as the Font Manager. Sets kAutoHinting Flag if useAutohinter is true. Clears kAutoHinting Flag if useAutohinter is false. ### Parameters

useAutohinter setting for kAutoHinting Flag

### Example

### See Also isAutohinted Hinting --- ## Vertical Text Text may be drawn by positioning each glyph, or by positioning the first glyph and using Font Advance to position subsequent Glyphs. By default, each successive glyph is positioned to the right of the preceding glyph. Vertical Text sets successive Glyphs to position below the preceding glyph. Skia can translate text character codes as a series of Glyphs, but does not implement font substitution, textual substitution, line layout, or contextual spacing like Kerning pairs. Use a text shaping engine like HarfBuzz to translate text runs into glyph series. Vertical Text is clear if text is drawn left to right or set if drawn from top to bottom. Flags kVerticalText Flag if clear draws text left to right. Flags kVerticalText Flag if set draws text top to bottom. Vertical Text is clear by default. Vertical Text can be set by default by setting SkPaintDefaults Flags to kVerticalText Flag at compile time. ### Example

## isVerticalText

bool isVerticalText() const

If true, Glyphs are drawn top to bottom instead of left to right. Equivalent to getFlags masked with kVerticalText Flag. ### Return Value kVerticalText Flag state ### Example

#### Example Output ~~~~ paint.isVerticalText() == !!(paint.getFlags() & SkPaint::kVerticalText_Flag) paint.isVerticalText() == !!(paint.getFlags() & SkPaint::kVerticalText_Flag) ~~~~

--- ## setVerticalText

void setVerticalText(bool verticalText)

If true, text advance positions the next glyph below the previous glyph instead of to the right of previous glyph. Sets kVerticalText Flag if vertical is true. Clears kVerticalText Flag if vertical is false. ### Parameters

verticalText setting for kVerticalText Flag

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## Fake Bold Fake Bold approximates the bold font style accompanying a normal font when a bold font face is not available. Skia does not provide font substitution; it is up to the client to find the bold font face using the platform Font Manager. Use Text Skew X to approximate an italic font style when the italic font face is not available. A FreeType based port may define SK_USE_FREETYPE_EMBOLDEN at compile time to direct the font engine to create the bold Glyphs. Otherwise, the extra bold is computed by increasing the stroke width and setting the Style to kStrokeAndFill Style as needed. Fake Bold is disabled by default. ### Example

## isFakeBoldText

bool isFakeBoldText() const

If true, approximate bold by increasing the stroke width when creating glyph bitmaps from outlines. Equivalent to getFlags masked with kFakeBoldText Flag. ### Return Value kFakeBoldText Flag state ### Example

#### Example Output ~~~~ paint.isFakeBoldText() == !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag) paint.isFakeBoldText() == !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag) ~~~~

--- ## setFakeBoldText

void setFakeBoldText(bool fakeBoldText)

Use increased stroke width when creating glyph bitmaps to approximate a bold typeface. Sets kFakeBoldText Flag if fakeBoldText is true. Clears kFakeBoldText Flag if fakeBoldText is false. ### Parameters

fakeBoldText setting for kFakeBoldText Flag

### Example

#### Example Output ~~~~ paint1 == paint2 ~~~~

--- ## Full Hinting Spacing if Hinting is set to kFull Hinting, Full Hinting Spacing adjusts the character spacing by the difference of the hinted and Unhinted Left Side Bearing and Right Side Bearing. Full Hinting Spacing only applies to platforms that use FreeType as their Font Engine. Full Hinting Spacing is not related to text Kerning, where the space between a specific pair of characters is adjusted using data in the font Kerning tables. ## isDevKernText

bool isDevKernText() const

Deprecated. --- ## setDevKernText

void setDevKernText(bool)

Deprecated. --- ## Filter Quality Methods Filter Quality trades speed for image filtering when the image is scaled. A lower Filter Quality draws faster, but has less fidelity. A higher Filter Quality draws slower, but looks better. If the image is drawn without scaling, the Filter Quality choice will not result in a noticeable difference. Filter Quality is used in Paint passed as a parameter to

SkCanvas::drawBitmap

SkCanvas::drawBitmapRect

SkCanvas::drawImage

SkCanvas::drawImageRect

and when Paint has a Shader specialization that uses Image or Bitmap. Filter Quality is kNone_SkFilterQuality by default. ### Example

## getFilterQuality

SkFilterQuality getFilterQuality() const

Returns Filter Quality, the image filtering level. A lower setting draws faster; a higher setting looks better when the image is scaled. ### Return Value one of: kNone_SkFilterQuality, kLow_SkFilterQuality, kMedium_SkFilterQuality, kHigh_SkFilterQuality ### Example

#### Example Output ~~~~ kNone_SkFilterQuality == paint.getFilterQuality() ~~~~

--- ## setFilterQuality

void setFilterQuality(SkFilterQuality quality)

Sets Filter Quality, the image filtering level. A lower setting draws faster; a higher setting looks better when the image is scaled. Does not check to see if quality is valid. ### Parameters

quality one of: kNone_SkFilterQuality, kLow_SkFilterQuality, kMedium_SkFilterQuality, kHigh_SkFilterQuality

### Example

#### Example Output ~~~~ kHigh_SkFilterQuality == paint.getFilterQuality() ~~~~

### See Also SkFilterQuality Image Scaling --- ## Color Methods | name | description | | --- | --- | | getColor | returns Color Alpha and RGB, one drawing color | | setColor | sets Color Alpha and RGB, one drawing color | Color specifies the red, blue, green, and Color Alpha values used to draw a filled or stroked shape in a 32-bit value. Each component occupies 8-bits, ranging from zero: no contribution; to 255: full intensity. All values in any combination are valid. Color is not Premultiplied; Color Alpha sets the transparency independent of RGB: red, blue, and green. The bit positions of Color Alpha and RGB are independent of the bit positions on the output device, which may have more or fewer bits, and may have a different arrangement. | bit positions | Color Alpha | red | blue | green | | --- | --- | --- | --- | --- | | | 31 - 24 | 23 - 16 | 15 - 8 | 7 - 0 | ### Example

## getColor

SkColor getColor() const

Retrieves Alpha and RGB, Unpremultiplied, packed into 32 bits. Use helpers SkColorGetA, SkColorGetR, SkColorGetG, and SkColorGetB to extract a color component. ### Return Value Unpremultiplied ARGB ### Example

#### Example Output ~~~~ Yellow is 100% red, 100% green, and 0% blue. ~~~~

### See Also SkColor --- ## setColor

void setColor(SkColor color)

Sets Alpha and RGB used when stroking and filling. The color is a 32-bit value, Unpremultiplied, packing 8-bit components for Alpha, red, blue, and green. ### Parameters

color Unpremultiplied ARGB

### Example

#### Example Output ~~~~ green1 == green2 ~~~~

### See Also SkColor setARGB SkColorSetARGB --- ## Alpha Methods Color Alpha sets the transparency independent of RGB: red, blue, and green. ## getAlpha

uint8_t getAlpha() const

Retrieves Alpha from the Color used when stroking and filling. ### Return Value Alpha ranging from zero, fully transparent, to 255, fully opaque ### Example

#### Example Output ~~~~ 255 == paint.getAlpha() ~~~~

--- ## setAlpha

void setAlpha(U8CPU a)

Replaces Alpha, leaving RGB unchanged. An out of range value triggers an assert in the debug build. a is a value from zero to 255. a set to zero makes Color fully transparent; a set to 255 makes Color fully opaque. ### Parameters

`a`	Alpha component of Color

### Example

#### Example Output ~~~~ 0x44112233 == paint.getColor() ~~~~

--- ## setARGB

void setARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b)

Sets Color used when drawing solid fills. The color components range from 0 to 255. The color is Unpremultiplied; Alpha sets the transparency independent of RGB. ### Parameters

`a`	amount of Color Alpha, from fully transparent (0) to fully opaque (255)
`r`	amount of red, from no red (0) to full red (255)
`g`	amount of green, from no green (0) to full green (255)
`b`	amount of blue, from no blue (0) to full blue (255)

### Example

#### Example Output ~~~~ transRed1 == transRed2 ~~~~

### See Also setColor SkColorSetARGB --- ## Style Style specifies if the geometry is filled, stroked, or both filled and stroked. Some shapes ignore Style and are always drawn filled or stroked. Set Style to kFill Style to fill the shape. The fill covers the area inside the geometry for most shapes. Set Style to kStroke Style to stroke the shape. ## Style Fill ### See Also Path Fill Type ## Style Stroke The stroke covers the area described by following the shape edge with a pen or brush of Stroke Width. The area covered where the shape starts and stops is described by Stroke Cap. The area covered where the shape turns a corner is described by Stroke Join. The stroke is centered on the shape; it extends equally on either side of the shape edge. As Stroke Width gets smaller, the drawn path frame is thinner. Stroke Width less than one may have gaps, and if kAntiAlias Flag is set, Color Alpha will increase to visually decrease coverage. ## Style Hairline Stroke Width of zero has a special meaning and switches drawing to use Hairline. Hairline draws the thinnest continuous frame. If kAntiAlias Flag is clear, adjacent pixels flow horizontally, vertically,or diagonally. Path drawing with Hairline may hit the same pixel more than once. For instance, Path containing two lines in one Path Contour will draw the corner point once, but may both lines may draw the adjacent pixel. If kAntiAlias Flag is set, transparency is applied twice, resulting in a darker pixel. Some GPU-backed implementations apply transparency at a later drawing stage, avoiding double hit pixels while stroking. ## Enum SkPaint::Style

    enum Style {
        kFill Style,
        kStroke Style,
        kStrokeAndFill Style,
    };

    static constexpr int kStyleCount = kStrokeAndFill Style + 1;

Set Style to fill, stroke, or both fill and stroke geometry. The stroke and fill share all paint attributes; for instance, they are drawn with the same color. Use kStrokeAndFill Style to avoid hitting the same pixels twice with a stroke draw and a fill draw. ### Constants

Const	Value	Description
`SkPaint::kFill_Style`	0	Applies to Rect, Region, Round Rect, Circles, Ovals, Path, and Text. Bitmap, Image, Patches, Region, Sprites, and Vertices are painted as if kFill Style is set, and ignore the set Style. The Path Fill Type specifies additional rules to fill the area outside the path edge, and to create an unfilled hole inside the shape. Style is set to kFill Style by default.
`SkPaint::kStroke_Style`	1	Applies to Rect, Region, Round Rect, Arcs, Circles, Ovals, Path, and Text. Arcs, Lines, and points, are always drawn as if kStroke Style is set, and ignore the set Style. The stroke construction is unaffected by the Path Fill Type.
`SkPaint::kStrokeAndFill_Style`	2	Applies to Rect, Region, Round Rect, Circles, Ovals, Path, and Text. Path is treated as if it is set to SkPath::kWinding FillType, and the set Path Fill Type is ignored.
`SkPaint::kStyleCount`	3	May be used to verify that Style is a legal value.

## getStyle

Style getStyle() const

Whether the geometry is filled, stroked, or filled and stroked. ### Return Value one of:kFill Style, kStroke Style, kStrokeAndFill Style ### Example

#### Example Output ~~~~ SkPaint::kFill_Style == paint.getStyle() ~~~~

### See Also Style setStyle --- ## setStyle

void setStyle(Style style)

Sets whether the geometry is filled, stroked, or filled and stroked. Has no effect if style is not a legal Style value. ### Parameters

style one of: kFill Style, kStroke Style, kStrokeAndFill Style

### Example

### See Also Style getStyle --- ### See Also Path Fill Type Path Effect Style Fill Style Stroke ## Stroke Width Stroke Width sets the width for stroking. The width is the thickness of the stroke perpendicular to the path direction when the paint style is set to kStroke Style or kStrokeAndFill Style. When width is greater than zero, the stroke encompasses as many pixels partially or fully as needed. When the width equals zero, the paint enables hairlines; the stroke is always one pixel wide. The stroke dimensions are scaled by the canvas matrix, but Hairline stroke remains one pixel wide regardless of scaling. The default width for the paint is zero. ### Example

The pixels hit to represent thin lines vary with the angle of the line and the platform implementation.

## getStrokeWidth

SkScalar getStrokeWidth() const

Returns the thickness of the pen used by Paint to outline the shape. ### Return Value zero for Hairline, greater than zero for pen thickness ### Example

#### Example Output ~~~~ 0 == paint.getStrokeWidth() ~~~~

--- ## setStrokeWidth

void setStrokeWidth(SkScalar width)

Sets the thickness of the pen used by the paint to outline the shape. Has no effect if width is less than zero. ### Parameters

width zero thickness for Hairline; greater than zero for pen thickness

### Example

#### Example Output ~~~~ 5 == paint.getStrokeWidth() ~~~~

--- ## Miter Limit Miter Limit specifies the maximum miter length, relative to the stroke width. Miter Limit is used when the Stroke Join is set to kMiter Join, and the Style is either kStroke Style or kStrokeAndFill Style. If the miter at a corner exceeds this limit, kMiter Join is replaced with kBevel Join. Miter Limit can be computed from the corner angle: miter limit = 1 / sin ( angle / 2 )Miter Limit default value is 4. The default may be changed at compile time by setting SkPaintDefaults MiterLimit in "SkUserConfig.h" or as a define supplied by the build environment. Here are some miter limits and the angles that triggers them. | miter limit | angle in degrees | | --- | --- | | 10 | 11.48 | | 9 | 12.76 | | 8 | 14.36 | | 7 | 16.43 | | 6 | 19.19 | | 5 | 23.07 | | 4 | 28.96 | | 3 | 38.94 | | 2 | 60 | | 1 | 180 | ### Example

This example draws a stroked corner and the miter length beneath. When the miter limit is decreased slightly, the miter join is replaced by a bevel join.

## getStrokeMiter

SkScalar getStrokeMiter() const

The limit at which a sharp corner is drawn beveled. ### Return Value zero and greater Miter Limit ### Example

#### Example Output ~~~~ default miter limit == 4 ~~~~

### See Also Miter Limit setStrokeMiter Join --- ## setStrokeMiter

void setStrokeMiter(SkScalar miter)

The limit at which a sharp corner is drawn beveled. Valid values are zero and greater. Has no effect if miter is less than zero. ### Parameters

miter zero and greater Miter Limit

### Example

#### Example Output ~~~~ default miter limit == 8 ~~~~

### See Also Miter Limit getStrokeMiter Join --- ## Stroke Cap ## Enum SkPaint::Cap

    enum Cap {
        kButt Cap,
        kRound Cap,
        kSquare Cap,

        kLast Cap = kSquare Cap,
        kDefault Cap = kButt Cap,
    };

    static constexpr int kCapCount = kLast Cap + 1;

Stroke Cap draws at the beginning and end of an open Path Contour. ### Constants

Const	Value	Description
`SkPaint::kButt_Cap`	0	Does not extend the stroke past the beginning or the end.
`SkPaint::kRound_Cap`	1	Adds a circle with a diameter equal to Stroke Width at the beginning and end.
`SkPaint::kSquare_Cap`	2	Adds a square with sides equal to Stroke Width at the beginning and end. The square sides are parallel to the initial and final direction of the stroke.
`SkPaint::kLast_Cap`	2	Equivalent to the largest value for Stroke Cap.
`SkPaint::kDefault_Cap`	0	Stroke Cap is set to kButt Cap by default.
`SkPaint::kCapCount`	3	May be used to verify that Stroke Cap is a legal value.

Stroke describes the area covered by a pen of Stroke Width as it follows the Path Contour, moving parallel to the contour direction. If the Path Contour is not terminated by SkPath::kClose Verb, the contour has a visible beginning and end. Path Contour may start and end at the same point; defining Zero Length Contour. kButt Cap and Zero Length Contour is not drawn. kRound Cap and Zero Length Contour draws a circle of diameter Stroke Width at the contour point. kSquare Cap and Zero Length Contour draws an upright square with a side of Stroke Width at the contour point. Stroke Cap is kButt Cap by default. ### Example

## getStrokeCap

Cap getStrokeCap() const

The geometry drawn at the beginning and end of strokes. ### Return Value one of: kButt Cap, kRound Cap, kSquare Cap ### Example

#### Example Output ~~~~ kButt_Cap == default stroke cap ~~~~

### See Also Stroke Cap setStrokeCap --- ## setStrokeCap

void setStrokeCap(Cap cap)

The geometry drawn at the beginning and end of strokes. ### Parameters

cap one of: kButt Cap, kRound Cap, kSquare Cap; has no effect if cap is not valid

### Example

#### Example Output ~~~~ kRound_Cap == paint.getStrokeCap() ~~~~

### See Also Stroke Cap getStrokeCap --- ## Stroke Join Stroke Join draws at the sharp corners of an open or closed Path Contour. Stroke describes the area covered by a pen of Stroke Width as it follows the Path Contour, moving parallel to the contour direction. If the contour direction changes abruptly, because the tangent direction leading to the end of a curve within the contour does not match the tangent direction of the following curve, the pair of curves meet at Stroke Join. ### Example

## Enum SkPaint::Join

    enum Join {
        kMiter Join,
        kRound Join,
        kBevel Join,

        kLast Join = kBevel Join,
        kDefault Join = kMiter Join,
    };

    static constexpr int kJoinCount = kLast Join + 1;

Join specifies how corners are drawn when a shape is stroked. Join affects the four corners of a stroked rectangle, and the connected segments in a stroked path. Choose miter join to draw sharp corners. Choose round join to draw a circle with a radius equal to the stroke width on top of the corner. Choose bevel join to minimally connect the thick strokes. The fill path constructed to describe the stroked path respects the join setting but may not contain the actual join. For instance, a fill path constructed with round joins does not necessarily include circles at each connected segment. ### Constants

Const	Value	Description
`SkPaint::kMiter_Join`	0	Extends the outside corner to the extent allowed by Miter Limit. If the extension exceeds Miter Limit, kBevel Join is used instead.
`SkPaint::kRound_Join`	1	Adds a circle with a diameter of Stroke Width at the sharp corner.
`SkPaint::kBevel_Join`	2	Connects the outside edges of the sharp corner.
`SkPaint::kLast_Join`	2	equivalent to the largest value for Stroke_Join
`SkPaint::kDefault_Join`	1	Stroke Join is set to kMiter Join by default.
`SkPaint::kJoinCount`	3	May be used to verify that Stroke Join is a legal value.

### Example

### See Also setStrokeJoin getStrokeJoin setStrokeMiter getStrokeMiter ## getStrokeJoin

Join getStrokeJoin() const

The geometry drawn at the corners of strokes. ### Return Value one of: kMiter Join, kRound Join, kBevel Join ### Example

#### Example Output ~~~~ kMiter_Join == default stroke join ~~~~

### See Also Stroke Join setStrokeJoin --- ## setStrokeJoin

void setStrokeJoin(Join join)

The geometry drawn at the corners of strokes. ### Parameters

join one of: kMiter Join, kRound Join, kBevel Join; otherwise, has no effect

### Example

#### Example Output ~~~~ kMiter_Join == paint.getStrokeJoin() ~~~~

### See Also Stroke Join getStrokeJoin --- ### See Also Miter Limit ## Fill Path Fill Path creates a Path by applying the Path Effect, followed by the Style Stroke. If Paint contains Path Effect, Path Effect operates on the source Path; the result replaces the destination Path. Otherwise, the source Path is replaces the destination Path. Fill Path can request the Path Effect to restrict to a culling rectangle, but the Path Effect is not required to do so. If Style is kStroke Style or kStrokeAndFill Style, and Stroke Width is greater than zero, the Stroke Width, Stroke Cap, Stroke Join, and Miter Limit operate on the destination Path, replacing it. Fill Path can specify the precision used by Stroke Width to approximate the stroke geometry. If the Style is kStroke Style and the Stroke Width is zero, getFillPath returns false since Hairline has no filled equivalent. ## getFillPath

bool getFillPath(const SkPath& src, SkPath* dst, const SkRect* cullRect, SkScalar resScale = 1) const

The filled equivalent of the stroked path. ### Parameters

`src`	Path read to create a filled version
`dst`	resulting Path; may be the same as src, but may not be nullptr
`cullRect`	optional limit passed to Path Effect
`resScale`	if > 1, increase precision, else if (0 < res < 1) reduce precision to favor speed and size

### Return Value true if the path represents Style Fill, or false if it represents Hairline ### Example

A very small Quad stroke is turned into a filled path with increasing levels of precision. At the lowest precision, the Quad stroke is approximated by a rectangle. At the highest precision, the filled path has high fidelity compared to the original stroke.

---

bool getFillPath(const SkPath& src, SkPath* dst) const

The filled equivalent of the stroked path. Replaces dst with the src path modified by Path Effect and Style Stroke. Path Effect, if any, is not culled. Stroke Width is created with default precision. ### Parameters

`src`	Path read to create a filled version
`dst`	resulting Path dst may be the same as src, but may not be nullptr

### Return Value true if the path represents Style Fill, or false if it represents Hairline ### Example

--- ### See Also Style Stroke Stroke Width Path Effect ## Shader Methods Shader defines the colors used when drawing a shape. Shader may be an image, a gradient, or a computed fill. If Paint has no Shader, then Color fills the shape. Shader is modulated by Color Alpha component of Color. If Shader object defines only Color Alpha, then Color modulated by Color Alpha describes the fill. The drawn transparency can be modified without altering Shader, by changing Color Alpha. ### Example

If Shader generates only Color Alpha then all components of Color modulate the output. ### Example

## getShader

SkShader* getShader() const

Optional colors used when filling a path, such as a gradient. Does not alter Shader Reference Count. ### Return Value Shader if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ nullptr == shader nullptr != shader ~~~~

--- ## refShader

sk sp<SkShader> refShader() const

Optional colors used when filling a path, such as a gradient. Increases Shader Reference Count by one. ### Return Value Shader if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ shader unique: true shader unique: false ~~~~

--- ## setShader

void setShader(sk sp<SkShader> shader)

Optional colors used when filling a path, such as a gradient. Sets Shader to shader, decreasing Reference Count of the previous Shader. Increments shader Reference Count by one. ### Parameters

shader how geometry is filled with color; if nullptr, Color is used instead

### Example

--- ## Color Filter Methods Color Filter alters the color used when drawing a shape. Color Filter may apply Blend Mode, transform the color through a matrix, or composite multiple filters. If Paint has no Color Filter, the color is unaltered. The drawn transparency can be modified without altering Color Filter, by changing Color Alpha. ### Example

## getColorFilter

SkColorFilter* getColorFilter() const

Returns Color Filter if set, or nullptr. Does not alter Color Filter Reference Count. ### Return Value Color Filter if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ nullptr == color filter nullptr != color filter ~~~~

--- ## refColorFilter

sk sp<SkColorFilter> refColorFilter() const

Returns Color Filter if set, or nullptr. Increases Color Filter Reference Count by one. ### Return Value Color Filter if set, or nullptr ### Example

#### Example Output ~~~~ color filter unique: true color filter unique: false ~~~~

--- ## setColorFilter

void setColorFilter(sk sp<SkColorFilter> colorFilter)

Sets Color Filter to filter, decreasing Reference Count of the previous Color Filter. Pass nullptr to clear Color Filter. Increments filter Reference Count by one. ### Parameters

colorFilter Color Filter to apply to subsequent draw

### Example

--- ## Blend Mode Methods Blend Mode describes how Color combines with the destination color. The default setting, SkBlendMode::kSrcOver, draws the source color over the destination color. ### Example

### See Also Blend Mode ## getBlendMode

SkBlendMode getBlendMode() const

Returns Blend Mode. By default, returns SkBlendMode::kSrcOver. ### Return Value mode used to combine source color with destination color ### Example

#### Example Output ~~~~ kSrcOver == getBlendMode kSrcOver != getBlendMode ~~~~

--- ## isSrcOver

bool isSrcOver() const

Returns true if Blend Mode is SkBlendMode::kSrcOver, the default. ### Return Value true if Blend Mode is SkBlendMode::kSrcOver ### Example

#### Example Output ~~~~ isSrcOver == true isSrcOver != true ~~~~

--- ## setBlendMode

void setBlendMode(SkBlendMode mode)

Sets Blend Mode to mode. Does not check for valid input. ### Parameters

mode SkBlendMode used to combine source color and destination

### Example

#### Example Output ~~~~ isSrcOver == true isSrcOver != true ~~~~

--- ## Path Effect Methods Path Effect modifies the path geometry before drawing it. Path Effect may implement dashing, custom fill effects and custom stroke effects. If Paint has no Path Effect, the path geometry is unaltered when filled or stroked. ### Example

### See Also Path Effect ## getPathEffect

SkPathEffect* getPathEffect() const

Returns Path Effect if set, or nullptr. Does not alter Path Effect Reference Count. ### Return Value Path Effect if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ nullptr == path effect nullptr != path effect ~~~~

--- ## refPathEffect

sk sp<SkPathEffect> refPathEffect() const

Returns Path Effect if set, or nullptr. Increases Path Effect Reference Count by one. ### Return Value Path Effect if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ path effect unique: true path effect unique: false ~~~~

--- ## setPathEffect

void setPathEffect(sk sp<SkPathEffect> pathEffect)

Sets Path Effect to pathEffect, decreasing Reference Count of the previous Path Effect. Pass nullptr to leave the path geometry unaltered. Increments pathEffect Reference Count by one. ### Parameters

pathEffect replace Path with a modification when drawn

### Example

--- ## Mask Filter Methods Mask Filter uses coverage of the shape drawn to create Mask Alpha. Mask Filter takes a Mask, and returns a Mask. Mask Filter may change the geometry and transparency of the shape, such as creating a blur effect. Set Mask Filter to nullptr to prevent Mask Filter from modifying the draw. ### Example

## getMaskFilter

SkMaskFilter* getMaskFilter() const

Returns Mask Filter if set, or nullptr. Does not alter Mask Filter Reference Count. ### Return Value Mask Filter if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ nullptr == mask filter nullptr != mask filter ~~~~

--- ## refMaskFilter

sk sp<SkMaskFilter> refMaskFilter() const

Returns Mask Filter if set, or nullptr. Increases Mask Filter Reference Count by one. ### Return Value Mask Filter if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ mask filter unique: true mask filter unique: false ~~~~

--- ## setMaskFilter

void setMaskFilter(sk sp<SkMaskFilter> maskFilter)

Sets Mask Filter to maskFilter, decreasing Reference Count of the previous Mask Filter. Pass nullptr to clear Mask Filter and leave Mask Filter effect on Mask Alpha unaltered. Increments maskFilter Reference Count by one. ### Parameters

maskFilter modifies clipping mask generated from drawn geometry

### Example

--- ## Typeface Methods Typeface identifies the font used when drawing and measuring text. Typeface may be specified by name, from a file, or from a data stream. The default Typeface defers to the platform-specific default font implementation. ### Example

## getTypeface

SkTypeface* getTypeface() const

Returns Typeface if set, or nullptr. Increments Typeface Reference Count by one. ### Return Value Typeface if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ nullptr == typeface nullptr != typeface ~~~~

--- ## refTypeface

sk sp<SkTypeface> refTypeface() const

Increases Typeface Reference Count by one. ### Return Value Typeface if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ typeface1 != typeface2 typeface1 == typeface2 ~~~~

--- ## setTypeface

void setTypeface(sk sp<SkTypeface> typeface)

Sets Typeface to typeface, decreasing Reference Count of the previous Typeface. Pass nullptr to clear Typeface and use the default typeface. Increments typeface Reference Count by one. ### Parameters

typeface font and style used to draw text

### Example

--- ## Image Filter Methods Image Filter operates on the pixel representation of the shape, as modified by Paint with Blend Mode set to SkBlendMode::kSrcOver. Image Filter creates a new bitmap, which is drawn to the device using the set Blend Mode. Image Filter is higher level than Mask Filter; for instance, an Image Filter can operate on all channels of Color, while Mask Filter generates Alpha only. Image Filter operates independently of and can be used in combination with Mask Filter. ### Example

## getImageFilter

SkImageFilter* getImageFilter() const

Returns Image Filter if set, or nullptr. Does not alter Image Filter Reference Count. ### Return Value Image Filter if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ nullptr == image filter nullptr != image filter ~~~~

--- ## refImageFilter

sk sp<SkImageFilter> refImageFilter() const

Returns Image Filter if set, or nullptr. Increases Image Filter Reference Count by one. ### Return Value Image Filter if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ image filter unique: true image filter unique: false ~~~~

--- ## setImageFilter

void setImageFilter(sk sp<SkImageFilter> imageFilter)

Sets Image Filter to imageFilter, decreasing Reference Count of the previous Image Filter. Pass nullptr to clear Image Filter, and remove Image Filter effect on drawing. Increments imageFilter Reference Count by one. ### Parameters

imageFilter how Image is sampled when transformed

### Example

--- ## Draw Looper Methods Draw Looper sets a modifier that communicates state from one Draw Layer to another to construct the draw. Draw Looper draws one or more times, modifying the canvas and paint each time. Draw Looper may be used to draw multiple colors or create a colored shadow. Set Draw Looper to nullptr to prevent Draw Looper from modifying the draw. ### Example

## getDrawLooper

SkDrawLooper* getDrawLooper() const

Returns Draw Looper if set, or nullptr. Does not alter Draw Looper Reference Count. ### Return Value Draw Looper if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ nullptr == draw looper nullptr != draw looper ~~~~

--- ## refDrawLooper

sk sp<SkDrawLooper> refDrawLooper() const

Returns Draw Looper if set, or nullptr. Increases Draw Looper Reference Count by one. ### Return Value Draw Looper if previously set, nullptr otherwise ### Example

#### Example Output ~~~~ draw looper unique: true draw looper unique: false ~~~~

--- ## getLooper

SkDrawLooper* getLooper() const

Deprecated. --- ## setDrawLooper

void setDrawLooper(sk sp<SkDrawLooper> drawLooper)

Sets Draw Looper to drawLooper, decreasing Reference Count of the previous drawLooper. Pass nullptr to clear Draw Looper and leave Draw Looper effect on drawing unaltered. Increments drawLooper Reference Count by one. ### Parameters

drawLooper iterates through drawing one or more time, altering Paint

### Example

--- ## setLooper

void setLooper(sk sp<SkDrawLooper> drawLooper)

Deprecated. --- ## Text Align ## Enum SkPaint::Align

    enum Align {
        kLeft Align,
        kCenter Align,
        kRight Align,
    };

    static constexpr int kAlignCount = 3;

Align adjusts the text relative to the text position. Align affects Glyphs drawn with: SkCanvas::drawText, SkCanvas::drawPosText, SkCanvas::drawPosTextH, SkCanvas::drawTextOnPath, SkCanvas::drawTextOnPathHV, SkCanvas::drawTextRSXform, SkCanvas::drawTextBlob, and SkCanvas::drawString; as well as calls that place text Glyphs like getTextWidths and getTextPath. The text position is set by the font for both horizontal and vertical text. Typically, for horizontal text, the position is to the left side of the glyph on the base line; and for vertical text, the position is the horizontal center of the glyph at the caps height. Align adjusts the glyph position to center it or move it to abut the position using the metrics returned by the font. Align defaults to kLeft Align. ### Constants

Const	Value	Description
`SkPaint::kLeft_Align`	0	Leaves the glyph at the position computed by the font offset by the text position.
`SkPaint::kCenter_Align`	1	Moves the glyph half its width if Flags has kVerticalText Flag clear, and half its height if Flags has kVerticalText Flag set.
`SkPaint::kRight_Align`	2	Moves the glyph by its width if Flags has kVerticalText Flag clear, and by its height if Flags has kVerticalText Flag set.
`SkPaint::kAlignCount`	3	May be used to verify that Align is a legal value.

### Example

Each position separately moves the glyph in drawPosText.

### Example

Vertical Text treats kLeft Align as top align, and kRight Align as bottom align.

## getTextAlign

Align getTextAlign() const

Returns Text Align. Returns kLeft Align if Text Align has not been set. ### Return Value text placement relative to position ### Example

#### Example Output ~~~~ kLeft_Align == default ~~~~

--- ## setTextAlign

void    setTextAlign(Align align)

Sets Text Align to align. Has no effect if align is an invalid value. ### Parameters

align text placement relative to position

### Example

Text is left-aligned by default, and then set to center. Setting the alignment out of range has no effect.

--- ## Text Size Text Size adjusts the overall text size in points. Text Size can be set to any positive value or zero. Text Size defaults to 12. Set SkPaintDefaults TextSize at compile time to change the default setting. ### Example

## getTextSize

SkScalar getTextSize() const

Returns Text Size in points. ### Return Value typographic height of text ### Example

--- ## setTextSize

void setTextSize(SkScalar textSize)

Sets Text Size in points. Has no effect if textSize is not greater than or equal to zero. ### Parameters

textSize typographic height of text

### Example

--- ## Text Scale X Text Scale X adjusts the text horizontal scale. Text scaling approximates condensed and expanded type faces when the actual face is not available. Text Scale X can be set to any value. Text Scale X defaults to 1. ### Example

## getTextScaleX

SkScalar getTextScaleX() const

Returns Text Scale X. Default value is 1. ### Return Value text horizontal scale ### Example

--- ## setTextScaleX

void setTextScaleX(SkScalar scaleX)

Sets Text Scale X. Default value is 1. ### Parameters

scaleX text horizontal scale

### Example

--- ## Text Skew X Text Skew X adjusts the text horizontal slant. Text skewing approximates italic and oblique type faces when the actual face is not available. Text Skew X can be set to any value. Text Skew X defaults to 0. ### Example

## getTextSkewX

SkScalar getTextSkewX() const

Returns Text Skew X. Default value is zero. ### Return Value additional shear in x-axis relative to y-axis ### Example

--- ## setTextSkewX

void setTextSkewX(SkScalar skewX)

Sets Text Skew X. Default value is zero. ### Parameters

skewX additional shear in x-axis relative to y-axis

### Example

--- ## Text Encoding ## Enum SkPaint::TextEncoding

    enum TextEncoding {
        kUTF8 TextEncoding,
        kUTF16 TextEncoding,
        kUTF32 TextEncoding,
        kGlyphID TextEncoding,
    };

TextEncoding determines whether text specifies character codes and their encoded size, or glyph indices. Characters are encoded as specified by the Unicode standard . Character codes encoded size are specified by UTF-8, UTF-16, or UTF-32. All character code formats are able to represent all of Unicode, differing only in the total storage required. UTF-8 (RFC 3629) encodes each character as one or more 8-bit bytes. UTF-16 (RFC 2781) encodes each character as one or two 16-bit words. UTF-32 encodes each character as one 32-bit word. Font Manager uses font data to convert character code points into glyph indices. A glyph index is a 16-bit word. TextEncoding is set to kUTF8 TextEncoding by default. ### Constants

Const	Value	Description
`SkPaint::kUTF8_TextEncoding`	0	uses bytes to represent UTF-8 or ASCII
`SkPaint::kUTF16_TextEncoding`	1	uses two byte words to represent most of Unicode
`SkPaint::kUTF32_TextEncoding`	2	uses four byte words to represent all of Unicode
`SkPaint::kGlyphID_TextEncoding`	3	uses two byte words to represent glyph indices

### Example

First line is encoded in UTF-8. Second line is encoded in UTF-16. Third line is encoded in UTF-32. Fourth line has 16-bit glyph indices.

## getTextEncoding

TextEncoding getTextEncoding() const

Returns Text Encoding. Text Encoding determines how character code points are mapped to font glyph indices. ### Return Value one of: kUTF8 TextEncoding, kUTF16 TextEncoding, kUTF32 TextEncoding, or kGlyphID TextEncoding ### Example

#### Example Output ~~~~ kUTF8_TextEncoding == text encoding kGlyphID_TextEncoding == text encoding ~~~~

--- ## setTextEncoding

void setTextEncoding(TextEncoding encoding)

Sets Text Encoding to encoding. Text Encoding determines how character code points are mapped to font glyph indices. Invalid values for encoding are ignored. ### Parameters #

encoding one of: kUTF8 TextEncoding, kUTF16 TextEncoding, kUTF32 TextEncoding, or kGlyphID TextEncoding

### Example

#### Example Output ~~~~ 4 != text encoding ~~~~

--- ## Font Metrics Font Metrics describe dimensions common to the Glyphs in Typeface. The dimensions are computed by Font Manager from font data and do not take Paint settings other than Text Size into account. Font dimensions specify the anchor to the left of the glyph at baseline as the origin. X-axis values to the left of the glyph are negative, and to the right of the left glyph edge are positive. Y-axis values above the baseline are negative, and below the baseline are positive. ### Example

# Struct SkPaint::FontMetrics ## Constant SkPaint related constants are defined by enum, enum class, #define, const, and constexpr.

Topic	Description
FontMetricsFlags	valid Font Metrics
kStrikeoutPositionIsValid Flag	set if fStrikeoutPosition is valid
kStrikeoutThicknessIsValid Flag	set if fStrikeoutThickness is valid
kUnderlinePositionIsValid Flag	set if fUnderlinePosition is valid
kUnderlineThicknessIsValid Flag	set if fUnderlineThickness is valid

## Member_Function SkPaint member functions read and modify the structure properties.

Topic	Description
hasStrikeoutPosition	returns strikeout position if set
hasStrikeoutThickness	returns strikeout thickness if set
hasUnderlinePosition	returns underline position if set
hasUnderlineThickness	returns underline thickness if set

## Member SkPaint members may be read and written directly without using a member function.

Topic	Description
fAscent	distance to reserve above baseline
fAvgCharWidth	average character width
fBottom	extent below baseline
fCapHeight	height of an upper-case letter
fDescent	distance to reserve below baseline
fFlags	is set to FontMetricsFlags when metrics are valid
fLeading	distance to add between lines
fMaxCharWidth	maximum character width
fStrikeoutPosition	strikeout position relative to baseline
fStrikeoutThickness	strikeout thickness
fTop	extent above baseline
fUnderlinePosition	underline position relative to baseline
fUnderlineThickness	underline thickness
fXHeight	height of lower-case 'x'
fXMax	maximum x
fXMin	minimum x

    struct FontMetrics {
        enum FontMetricsFlags {
            kUnderlineThicknessIsValid Flag = 1 << 0,
            kUnderlinePositionIsValid Flag = 1 << 1,
            kStrikeoutThicknessIsValid Flag = 1 << 2,
            kStrikeoutPositionIsValid Flag = 1 << 3,
        };

        uint32_t    fFlags;
        SkScalar    fTop;
        SkScalar    fAscent;
        SkScalar    fDescent;
        SkScalar    fBottom;
        SkScalar    fLeading;
        SkScalar    fAvgCharWidth;
        SkScalar    fMaxCharWidth;
        SkScalar    fXMin;
        SkScalar    fXMax;
        SkScalar    fXHeight;
        SkScalar    fCapHeight;
        SkScalar    fUnderlineThickness;
        SkScalar    fUnderlinePosition;
        SkScalar    fStrikeoutThickness;
        SkScalar    fStrikeoutPosition;

        bool hasUnderlineThickness(SkScalar* thickness) const;
        bool hasUnderlinePosition(SkScalar* position) const;
        bool hasStrikeoutThickness(SkScalar* thickness) const;
        bool hasStrikeoutPosition(SkScalar* position) const;
    };

FontMetrics is filled out by getFontMetrics. FontMetrics contents reflect the values computed by Font Manager using Typeface. Values are set to zero if they are not available. All vertical values relative to the baseline are given y-down. As such, zero is on the baseline, negative values are above the baseline, and positive values are below the baseline. fUnderlineThickness and fUnderlinePosition have a bit set in fFlags if their values are valid, since their value may be zero. fStrikeoutThickness and fStrikeoutPosition have a bit set in fFlags if their values are valid, since their value may be zero. ## Enum SkPaint::FontMetrics::FontMetricsFlags

        enum FontMetricsFlags {
            kUnderlineThicknessIsValid Flag = 1 << 0,
            kUnderlinePositionIsValid Flag = 1 << 1,
            kStrikeoutThicknessIsValid Flag = 1 << 2,
            kStrikeoutPositionIsValid Flag = 1 << 3,
        };

FontMetricsFlags are set in fFlags when underline and strikeout metrics are valid; the underline or strikeout metric may be valid and zero. Fonts with embedded bitmaps may not have valid underline or strikeout metrics. ### Constants

Const	Value	Description
`SkPaint::FontMetrics::kUnderlineThicknessIsValid_Flag`	0x0001	set if fUnderlineThickness is valid
`SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag`	0x0002	set if fUnderlinePosition is valid
`SkPaint::FontMetrics::kStrikeoutThicknessIsValid_Flag`	0x0004	set if fStrikeoutThickness is valid
`SkPaint::FontMetrics::kStrikeoutPositionIsValid_Flag`	0x0008	set if fStrikeoutPosition is valid

### Members

Type	Name	Description
uint32_t	`fFlags`	is set to FontMetricsFlags when metrics are valid
SkScalar	`fTop`	Greatest extent above the baseline for any glyph. Typically less than zero.
SkScalar	`fAscent`	Recommended distance above the baseline to reserve for a line of text. Typically less than zero.
SkScalar	`fDescent`	Recommended distance below the baseline to reserve for a line of text. Typically greater than zero.
SkScalar	`fBottom`	Greatest extent below the baseline for any glyph. Typically greater than zero.
SkScalar	`fLeading`	Recommended distance to add between lines of text. Typically greater than or equal to zero.
SkScalar	`fAvgCharWidth`	Average character width, if it is available. Zero if no average width is stored in the font.
SkScalar	`fMaxCharWidth`	maximum character width
SkScalar	`fXMin`	Minimum bounding box x-value for all Glyphs. Typically less than zero.
SkScalar	`fXMax`	Maximum bounding box x value for all Glyphs. Typically greater than zero.
SkScalar	`fXHeight`	May be zero if no lower-case height is stored in the font.
SkScalar	`fCapHeight`	May be zero if no upper-case height is stored in the font.
SkScalar	`fUnderlineThickness`	If the metric is valid, the kUnderlineThicknessIsValid Flag is set in fFlags. If kUnderlineThicknessIsValid Flag is clear, fUnderlineThickness is zero.
SkScalar	`fUnderlinePosition`	Position of the top of the underline stroke relative to the baseline. Typically positive when valid. If the metric is valid, the kUnderlinePositionIsValid Flag is set in fFlags. If kUnderlinePositionIsValid Flag is clear, fUnderlinePosition is zero.
SkScalar	`fStrikeoutThickness`	If the metric is valid, the kStrikeoutThicknessIsValid Flag is set in fFlags. If kStrikeoutThicknessIsValid Flag is clear, fStrikeoutThickness is zero.
SkScalar	`fStrikeoutPosition`	Position of the bottom of the strikeout stroke relative to the baseline. Typically negative when valid. If the metric is valid, the kStrikeoutPositionIsValid Flag is set in fFlags. If kStrikeoutPositionIsValid Flag is clear, fStrikeoutPosition is zero.

## hasUnderlineThickness

bool hasUnderlineThickness(SkScalar* thickness) const

If Font Metrics has a valid underline thickness, return true, and set thickness to that value. If the underline thickness is not valid, return false, and ignore thickness. ### Parameters

thickness storage for underline width

### Return Value true if font specifies underline width --- ## hasUnderlinePosition

bool hasUnderlinePosition(SkScalar* position) const

If Font Metrics has a valid underline position, return true, and set position to that value. If the underline position is not valid, return false, and ignore position. ### Parameters

position storage for underline position

### Return Value true if font specifies underline position --- ## hasStrikeoutThickness

bool hasStrikeoutThickness(SkScalar* thickness) const

If Font Metrics has a valid strikeout thickness, return true, and set thickness to that value. If the underline thickness is not valid, return false, and ignore thickness. ### Parameters

thickness storage for strikeout width

### Return Value true if font specifies strikeout width --- ## hasStrikeoutPosition

bool hasStrikeoutPosition(SkScalar* position) const

If Font Metrics has a valid strikeout position, return true, and set position to that value. If the underline position is not valid, return false, and ignore position. ### Parameters

position storage for strikeout position

### Return Value true if font specifies strikeout position --- ## getFontMetrics

SkScalar getFontMetrics(FontMetrics* metrics, SkScalar scale = 0) const

Returns Font Metrics associated with Typeface. The return value is the recommended spacing between lines: the sum of metrics descent, ascent, and leading. If metrics is not nullptr, Font Metrics is copied to metrics. Results are scaled by Text Size but does not take into account dimensions required by Text Scale X, Text Skew X, Fake Bold, Style Stroke, and Path Effect. Results can be additionally scaled by scale; a scale of zero is ignored. ### Parameters

`metrics`	storage for Font Metrics from Typeface; may be nullptr
`scale`	additional multiplier for returned values

### Return Value recommended spacing between lines ### Example

### See Also Text Size Typeface Typeface Methods --- ## getFontSpacing

SkScalar getFontSpacing() const

Returns the recommended spacing between lines: the sum of metrics descent, ascent, and leading. Result is scaled by Text Size but does not take into account dimensions required by stroking and Path Effect. Returns the same result as getFontMetrics. ### Return Value recommended spacing between lines ### Example

#### Example Output ~~~~ textSize: 12 fontSpacing: 13.9688 textSize: 18 fontSpacing: 20.9531 textSize: 24 fontSpacing: 27.9375 textSize: 32 fontSpacing: 37.25 ~~~~

--- ## getFontBounds

SkRect getFontBounds() const

Returns the union of bounds of all Glyphs. Returned dimensions are computed by Font Manager from font data, ignoring Hinting. Includes Text Size, Text Scale X, and Text Skew X, but not Fake Bold or Path Effect. If Text Size is large, Text Scale X is one, and Text Skew X is zero, returns the same bounds as Font Metrics { FontMetrics::fXMin, FontMetrics::fTop, FontMetrics::fXMax, FontMetrics::fBottom }. ### Return Value union of bounds of all Glyphs ### Example

#### Example Output ~~~~ metrics bounds = { -12.2461, -14.7891, 21.5215, 5.55469 } font bounds = { -12.2461, -14.7891, 21.5215, 5.55469 } ~~~~

--- ## textToGlyphs

int textToGlyphs(const void* text, size_t byteLength, SkGlyphID glyphs[]) const

Converts text into glyph indices. Returns the number of glyph indices represented by text. Text Encoding specifies how text represents characters or glyphs. glyphs may be nullptr, to compute the glyph count. Does not check text for valid character codes or valid glyph indices. If byteLength equals zero, returns zero. If byteLength includes a partial character, the partial character is ignored. If Text Encoding is kUTF8 TextEncoding and text contains an invalid UTF-8 sequence, zero is returned. ### Parameters

`text`	character storage encoded with Text Encoding
`byteLength`	length of character storage in bytes
`glyphs`	storage for glyph indices; may be nullptr

### Return Value number of glyphs represented by text of length byteLength ### Example

--- ## countText

int countText(const void* text, size_t byteLength) const

Returns the number of Glyphs in text. Uses Text Encoding to count the Glyphs. Returns the same result as textToGlyphs. ### Parameters

`text`	character storage encoded with Text Encoding
`byteLength`	length of character storage in bytes

### Return Value number of Glyphs represented by text of length byteLength ### Example

#### Example Output ~~~~ count = 5 ~~~~

--- ## containsText

bool containsText(const void* text, size_t byteLength) const

Returns true if all text corresponds to a non-zero glyph index. Returns false if any characters in text are not supported in Typeface. If Text Encoding is kGlyphID TextEncoding, returns true if all glyph indices in text are non-zero; does not check to see if text contains valid glyph indices for Typeface. Returns true if byteLength is zero. ### Parameters

`text`	array of characters or Glyphs
`byteLength`	number of bytes in text array

### Return Value true if all text corresponds to a non-zero glyph index ### Example

containsText succeeds for degree symbol, but cannot find a glyph index corresponding to the Unicode surrogate code point.

#### Example Output ~~~~ 0x00b0 == has char 0xd800 != has char ~~~~

### Example

containsText returns true that glyph index is greater than zero, not that it corresponds to an entry in Typeface.

#### Example Output ~~~~ 0x01ff == has glyph 0x0000 != has glyph 0xffff == has glyph ~~~~

### See Also setTextEncoding Typeface --- ## glyphsToUnichars

void glyphsToUnichars(const SkGlyphID glyphs[], int count, SkUnichar text[]) const

Converts glyphs into text if possible. Glyph values without direct Unicode equivalents are mapped to zero. Uses the Typeface, but is unaffected by Text Encoding; the text values returned are equivalent to kUTF32 TextEncoding. Only supported on platforms that use FreeType as the Font Engine. ### Parameters

`glyphs`	array of indices into font
`count`	length of glyph array
`text`	storage for character codes, one per glyph

### Example

Convert UTF-8 text to glyphs; then convert glyphs to Unichar code points.

--- ## Measure Text ## measureText

SkScalar measureText(const void* text, size_t length, SkRect* bounds) const

Returns the advance width of text if kVerticalText Flag is clear, and the height of text if kVerticalText Flag is set. The advance is the normal distance to move before drawing additional text. Uses Text Encoding to decode text, Typeface to get the font metrics, and Text Size, Text Scale X, Text Skew X, Stroke Width, and Path Effect to scale the metrics and bounds. Returns the bounding box of text if bounds is not nullptr. The bounding box is computed as if the text was drawn at the origin. ### Parameters

`text`	character codes or glyph indices to be measured
`length`	number of bytes of text to measure
`bounds`	returns bounding box relative to (0, 0) if not nullptr

### Return Value advance width or height ### Example

---

SkScalar measureText(const void* text, size_t length) const

Returns the advance width of text if kVerticalText Flag is clear, and the height of text if kVerticalText Flag is set. The advance is the normal distance to move before drawing additional text. Uses Text Encoding to decode text, Typeface to get the font metrics, and Text Size to scale the metrics. Does not scale the advance or bounds by Fake Bold or Path Effect. ### Parameters

`text`	character codes or glyph indices to be measured
`length`	number of bytes of text to measure

### Return Value advance width or height ### Example

#### Example Output ~~~~ default width = 5 double width = 10 ~~~~

--- ## breakText

size_t breakText(const void* text, size_t length, SkScalar maxWidth,
                 SkScalar* measuredWidth = nullptr) const

Returns the bytes of text that fit within maxWidth. If kVerticalText Flag is clear, the text fragment fits if its advance width is less than or equal to maxWidth. If kVerticalText Flag is set, the text fragment fits if its advance height is less than or equal to maxWidth. Measures only while the advance is less than or equal to maxWidth. Returns the advance or the text fragment in measuredWidth if it not nullptr. Uses Text Encoding to decode text, Typeface to get the font metrics, and Text Size to scale the metrics. Does not scale the advance or bounds by Fake Bold or Path Effect. ### Parameters

`text`	character codes or glyph indices to be measured
`length`	number of bytes of text to measure
`maxWidth`	advance limit; text is measured while advance is less than maxWidth
`measuredWidth`	returns the width of the text less than or equal to maxWidth

### Return Value bytes of text that fit, always less than or equal to length ### Example

Line under "" shows desired width, shorter than available characters. Line under "" shows measured width after breaking text.

--- ## getTextWidths

int getTextWidths(const void* text, size_t byteLength, SkScalar widths[], SkRect bounds[] = nullptr) const

Retrieves the advance and bounds for each glyph in text, and returns the glyph count in text. Both widths and bounds may be nullptr. If widths is not nullptr, widths must be an array of glyph count entries. if bounds is not nullptr, bounds must be an array of glyph count entries. If kVerticalText Flag is clear, widths returns the horizontal advance. If kVerticalText Flag is set, widths returns the vertical advance. Uses Text Encoding to decode text, Typeface to get the font metrics, and Text Size to scale the widths and bounds. Does not scale the advance by Fake Bold or Path Effect. Does include Fake Bold and Path Effect in the bounds. ### Parameters

`text`	character codes or glyph indices to be measured
`byteLength`	number of bytes of text to measure
`widths`	returns text advances for each glyph; may be nullptr
`bounds`	returns bounds for each glyph relative to (0, 0); may be nullptr

### Return Value glyph count in text ### Example

Bounds of Glyphs increase for stroked text, but text advance remains the same. The underlines show the text advance, spaced to keep them distinct.

--- ## Text Path Text Path describes the geometry of Glyphs used to draw text. ## getTextPath

void getTextPath(const void* text, size_t length, SkScalar x, SkScalar y, SkPath* path) const

Returns the geometry as Path equivalent to the drawn text. Uses Text Encoding to decode text, Typeface to get the glyph paths, and Text Size, Fake Bold, and Path Effect to scale and modify the glyph paths. All of the glyph paths are stored in path. Uses x, y, and Text Align to position path. ### Parameters

`text`	character codes or glyph indices
`length`	number of bytes of text
`x`	x-coordinate of the origin of the text
`y`	y-coordinate of the origin of the text
`path`	geometry of the Glyphs

### Example

Text is added to Path, offset, and subtracted from Path, then added at the offset location. The result is rendered with one draw call.

--- ## getPosTextPath

void getPosTextPath(const void* text, size_t length, const SkPoint pos[], SkPath* path) const

Returns the geometry as Path equivalent to the drawn text. Uses Text Encoding to decode text, Typeface to get the glyph paths, and Text Size, Fake Bold, and Path Effect to scale and modify the glyph paths. All of the glyph paths are stored in path. Uses pos array and Text Align to position path. pos contains a position for each glyph. ### Parameters

`text`	character codes or glyph indices
`length`	number of bytes of text
`pos`	positions of each glyph
`path`	geometry of the Glyphs

### Example

Simplifies three Glyphs to eliminate overlaps, and strokes the result.

--- ## Text Intercepts Text Intercepts describe the intersection of drawn text Glyphs with a pair of lines parallel to the text advance. Text Intercepts permits creating a underline that skips Descenders. ## getTextIntercepts

int getTextIntercepts(const void* text, size_t length, SkScalar x, SkScalar y,
                      const SkScalar bounds[2], SkScalar* intervals) const

Returns the number of intervals that intersect bounds. bounds describes a pair of lines parallel to the text advance. The return count is zero or a multiple of two, and is at most twice the number of Glyphs in the string. Uses Text Encoding to decode text, Typeface to get the glyph paths, and Text Size, Fake Bold, and Path Effect to scale and modify the glyph paths. Uses x, y, and Text Align to position intervals. Pass nullptr for intervals to determine the size of the interval array. intervals are cached to improve performance for multiple calls. ### Parameters

`text`	character codes or glyph indices
`length`	number of bytes of text
`x`	x-coordinate of the origin of the text
`y`	y-coordinate of the origin of the text
`bounds`	lower and upper line parallel to the advance
`intervals`	returned intersections; may be nullptr

### Return Value number of intersections; may be zero ### Example

Underline uses intercepts to draw on either side of the glyph Descender.

--- ## getPosTextIntercepts

int getPosTextIntercepts(const void* text, size_t length, const SkPoint pos[],
                         const SkScalar bounds[2], SkScalar* intervals) const

Returns the number of intervals that intersect bounds. bounds describes a pair of lines parallel to the text advance. The return count is zero or a multiple of two, and is at most twice the number of Glyphs in the string. Uses Text Encoding to decode text, Typeface to get the glyph paths, and Text Size, Fake Bold, and Path Effect to scale and modify the glyph paths. Uses pos array and Text Align to position intervals. Pass nullptr for intervals to determine the size of the interval array. intervals are cached to improve performance for multiple calls. ### Parameters

`text`	character codes or glyph indices
`length`	number of bytes of text
`pos`	positions of each glyph
`bounds`	lower and upper line parallel to the advance
`intervals`	returned intersections; may be nullptr

### Return Value number of intersections; may be zero ### Example

Text intercepts draw on either side of, but not inside, Glyphs in a run.

--- ## getPosTextHIntercepts

int getPosTextHIntercepts(const void* text, size_t length, const SkScalar xpos[], SkScalar constY,
                          const SkScalar bounds[2], SkScalar* intervals) const

Returns the number of intervals that intersect bounds. bounds describes a pair of lines parallel to the text advance. The return count is zero or a multiple of two, and is at most twice the number of Glyphs in the string. Uses Text Encoding to decode text, Typeface to get the glyph paths, and Text Size, Fake Bold, and Path Effect to scale and modify the glyph paths. Uses xpos array, constY, and Text Align to position intervals. Pass nullptr for intervals to determine the size of the interval array. intervals are cached to improve performance for multiple calls. ### Parameters

`text`	character codes or glyph indices
`length`	number of bytes of text
`xpos`	positions of each glyph in x
`constY`	position of each glyph in y
`bounds`	lower and upper line parallel to the advance
`intervals`	returned intersections; may be nullptr

### Return Value number of intersections; may be zero ### Example

Text intercepts do not take stroke thickness into consideration.

--- ## getTextBlobIntercepts

int getTextBlobIntercepts(const SkTextBlob* blob, const SkScalar bounds[2], SkScalar* intervals) const

Returns the number of intervals that intersect bounds. bounds describes a pair of lines parallel to the text advance. The return count is zero or a multiple of two, and is at most twice the number of Glyphs in the string. Uses Typeface to get the glyph paths, and Text Size, Fake Bold, and Path Effect to scale and modify the glyph paths. Uses run array and Text Align to position intervals. Text Encoding must be set to SkPaint::kGlyphID TextEncoding. Pass nullptr for intervals to determine the size of the interval array. intervals are cached to improve performance for multiple calls. ### Parameters

`blob`	Glyphs, positions, and text paint attributes
`bounds`	lower and upper line parallel to the advance
`intervals`	returned intersections; may be nullptr

### Return Value number of intersections; may be zero ### Example

--- ## nothingToDraw

bool nothingToDraw() const

Returns true if Paint prevents all drawing; otherwise, the Paint may or may not allow drawing. Returns true if, for example, Blend Mode combined with Color Alpha computes a new Alpha of zero. ### Return Value true if Paint prevents all drawing ### Example

#### Example Output ~~~~ initial nothing to draw: false blend dst nothing to draw: true blend src over nothing to draw: false alpha 0 nothing to draw: true ~~~~

--- ## Fast Bounds To be made private. Fast Bounds functions conservatively outset a drawing bounds by additional area Paint may draw to. ## canComputeFastBounds

bool canComputeFastBounds() const

( to be made private) Returns true if Paint does not include elements requiring extensive computation to compute Device bounds of drawn geometry. For instance, Paint with Path Effect always returns false. ### Return Value true if Paint allows for fast computation of bounds --- ## computeFastBounds

const SkRect& computeFastBounds(const SkRect& orig, SkRect* storage) const

( to be made private) Only call this if canComputeFastBounds returned true. This takes a raw rectangle (the raw bounds of a shape), and adjusts it for stylistic effects in the paint (e.g. stroking). If needed, it uses the storage parameter. It returns the adjusted bounds that can then be used for SkCanvas::quickReject tests. The returned Rect will either be orig or storage, thus the caller should not rely on storage being set to the result, but should always use the returned value. It is legal for orig and storage to be the same Rect. For example: if (!path.isInverseFillType() && paint.canComputeFastBounds) { SkRect storage; if (canvas->quickReject(paint.computeFastBounds(path.getBounds(), &storage))) { return; // do not draw the path } } // draw the path ### Parameters

`orig`	geometry modified by Paint when drawn
`storage`	computed bounds of geometry; may not be nullptr

### Return Value fast computed bounds --- ## computeFastStrokeBounds

const SkRect& computeFastStrokeBounds(const SkRect& orig, SkRect* storage) const

( to be made private) ### Parameters

`orig`	geometry modified by Paint when drawn
`storage`	computed bounds of geometry

### Return Value fast computed bounds --- ## doComputeFastBounds

const SkRect& doComputeFastBounds(const SkRect& orig, SkRect* storage, Style style) const

( to be made private) Computes the bounds, overriding the Paint Style. This can be used to account for additional width required by stroking orig, without altering Style set to fill. ### Parameters

`orig`	geometry modified by Paint when drawn
`storage`	computed bounds of geometry
`style`	overrides Style

### Return Value fast computed bounds --- ## Utility

Topic	Description
containsText	returns if all text corresponds to Glyphs
countText	returns number of Glyphs in text
glyphsToUnichars	converts Glyphs into text
nothingToDraw	returns true if Paint prevents all drawing
textToGlyphs	converts text into glyph indices