| SkPaint Reference |
| === |
| |
| # <a name="Paint"></a> Paint |
| |
| ## <a name="Overview"></a> Overview |
| |
| ## <a name="Overview_Subtopic"></a> Overview Subtopic |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#Class_or_Struct">Class or Struct</a> | embedded struct and class members | |
| | <a href="#Constant">Constant</a> | enum and enum class, const values | |
| | <a href="#Constructor">Constructor</a> | functions that construct <a href="#SkPaint">SkPaint</a> | |
| | <a href="#Member_Function">Member Function</a> | static functions and member methods | |
| | <a href="#Operator">Operator</a> | operator overloading methods | |
| | <a href="#Related_Function">Related Function</a> | similar methods grouped together | |
| |
| # <a name="SkPaint"></a> Class SkPaint |
| <a href="#Paint">Paint</a> controls options applied when drawing and measuring. <a href="#Paint">Paint</a> collects all |
| options outside of the <a href="SkCanvas_Reference#Clip">Canvas Clip</a> and <a href="SkCanvas_Reference#Matrix">Canvas Matrix</a>. |
| |
| 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 <a href="SkCanvas_Reference#Canvas">Canvas</a> |
| functionality; for instance, text size is identical to matrix scale. |
| |
| <a href="#Paint">Paint</a> options are rarely exclusive; each option modifies a stage of the drawing |
| pipeline and multiple pipeline stages may be affected by a single <a href="#Paint">Paint</a>. |
| |
| <a href="#Paint">Paint</a> collects effects and filters that describe single-pass and multiple-pass |
| algorithms that alter the drawing geometry, color, and transparency. For instance, |
| <a href="#Paint">Paint</a> does not directly implement dashing or blur, but contains the objects that do so. |
| |
| The objects contained by <a href="#Paint">Paint</a> are opaque, and cannot be edited outside of the <a href="#Paint">Paint</a> |
| to affect it. The implementation is free to defer computations associated with the |
| <a href="#Paint">Paint</a>, or ignore them altogether. For instance, some GPU implementations draw all |
| <a href="SkPath_Reference#Path">Path</a> geometries with Anti-aliasing, regardless of how <a href="#SkPaint_kAntiAlias_Flag">SkPaint::kAntiAlias Flag</a> |
| is set in <a href="#Paint">Paint</a>. |
| |
| <a href="#Paint">Paint</a> 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 |
| <a href="undocumented#Shader">Shader</a> attached to <a href="#Paint">Paint</a>. |
| |
| ## <a name="Related_Function"></a> Related Function |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#Alpha_Methods">Alpha Methods</a> | get and set <a href="SkColor_Reference#Alpha">Alpha</a> | |
| | Anti-alias | approximating coverage with transparency | |
| | <a href="#Automatic_Hinting">Automatic Hinting</a> | always adjust glyph paths | |
| | <a href="#Blend_Mode_Methods">Blend Mode Methods</a> | get and set <a href="undocumented#Blend_Mode">Blend Mode</a> | |
| | <a href="#Color_Filter_Methods">Color Filter Methods</a> | get and set <a href="undocumented#Color_Filter">Color Filter</a> | |
| | <a href="#Color_Methods">Color Methods</a> | get and set <a href="SkColor_Reference#Color">Color</a> | |
| | <a href="#Device_Text">Device Text</a> | increase precision of glyph position | |
| | <a href="#Dither">Dither</a> | distributing color error | |
| | <a href="#Draw_Looper_Methods">Draw Looper Methods</a> | get and set <a href="undocumented#Draw_Looper">Draw Looper</a> | |
| | <a href="#Fake_Bold">Fake Bold</a> | approximate font styles | |
| | <a href="#Fast_Bounds">Fast Bounds</a> | approximate area required by <a href="#Paint">Paint</a> | |
| | <a href="#Fill_Path">Fill Path</a> | make <a href="SkPath_Reference#Path">Path</a> from <a href="undocumented#Path_Effect">Path Effect</a>, stroking | |
| | <a href="#Filter_Quality_Methods">Filter Quality Methods</a> | get and set <a href="undocumented#Filter_Quality">Filter Quality</a> | |
| | <a href="#SkPaint_Flags">Flags</a> | attributes represented by single bits | |
| | <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a> | custom sized bitmap <a href="undocumented#Glyph">Glyphs</a> | |
| | <a href="#Font_Metrics">Font Metrics</a> | common glyph dimensions | |
| | <a href="#Full_Hinting_Spacing">Full Hinting Spacing</a> | glyph spacing affected by hinting | |
| | <a href="#SkPaint_Hinting">Hinting</a> | glyph outline adjustment | |
| | <a href="#Image_Filter_Methods">Image Filter Methods</a> | get and set <a href="undocumented#Image_Filter">Image Filter</a> | |
| | <a href="#Initializers">Initializers</a> | constructors and initialization | |
| | <a href="#LCD_Text">LCD Text</a> | text relying on the order of <a href="SkColor_Reference#RGB">Color RGB</a> stripes | |
| | <a href="#Linear_Text">Linear Text</a> | selects text rendering as <a href="undocumented#Glyph">Glyph</a> or <a href="SkPath_Reference#Path">Path</a> | |
| | <a href="#Management">Management</a> | paint copying, moving, comparing | |
| | <a href="#Mask_Filter_Methods">Mask Filter Methods</a> | get and set <a href="undocumented#Mask_Filter">Mask Filter</a> | |
| | <a href="#Measure_Text">Measure Text</a> | width, height, bounds of text | |
| | <a href="#Miter_Limit">Miter Limit</a> | maximum length of stroked corners | |
| | <a href="#Path_Effect_Methods">Path Effect Methods</a> | get and set <a href="undocumented#Path_Effect">Path Effect</a> | |
| | <a href="#Shader_Methods">Shader Methods</a> | get and set <a href="undocumented#Shader">Shader</a> | |
| | <a href="#Stroke_Cap">Stroke Cap</a> | decorations at ends of open strokes | |
| | <a href="#Stroke_Join">Stroke Join</a> | decoration at corners of strokes | |
| | <a href="#Stroke_Width">Stroke Width</a> | thickness perpendicular to geometry | |
| | <a href="#SkPaint_Style">Style</a> | geometry filling, stroking | |
| | <a href="#Style_Fill">Style Fill</a> | fill and stroke | |
| | <a href="#Style_Hairline">Style Hairline</a> | lines and curves with minimal width | |
| | <a href="#Style_Stroke">Style Stroke</a> | lines and curves with width | |
| | <a href="#Subpixel_Text">Subpixel Text</a> | uses pixel transparency to represent fractional offset | |
| | <a href="#Text_Align">Text Align</a> | text placement relative to position | |
| | <a href="#Text_Encoding">Text Encoding</a> | text encoded as characters or <a href="undocumented#Glyph">Glyphs</a> | |
| | <a href="#Text_Intercepts">Text Intercepts</a> | advanced underline, strike through | |
| | <a href="#Text_Path">Text Path</a> | geometry of <a href="undocumented#Glyph">Glyphs</a> | |
| | <a href="#Text_Scale_X">Text Scale X</a> | text horizontal scale | |
| | <a href="#Text_Size">Text Size</a> | overall height in points | |
| | <a href="#Text_Skew_X">Text Skew X</a> | text horizontal slant | |
| | <a href="#Typeface_Methods">Typeface Methods</a> | get and set <a href="undocumented#Typeface">Typeface</a> | |
| | <a href="#Utility">Utility</a> | rarely called management functions | |
| | <a href="#Vertical_Text">Vertical Text</a> | orient text from top to bottom | |
| |
| ## <a name="Constant"></a> Constant |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#SkPaint_Align">Align</a> | glyph locations relative to text position | |
| | <a href="#SkPaint_Cap">Cap</a> | start and end geometry on stroked shapes | |
| | <a href="#SkPaint_Flags">Flags</a> | values described by bits and masks | |
| | <a href="#SkPaint_Hinting">Hinting</a> | level of glyph outline adjustment | |
| | <a href="#SkPaint_Join">Join</a> | corner geometry on stroked shapes | |
| | <a href="#SkPaint_Style">Style</a> | stroke, fill, or both | |
| | <a href="#SkPaint_TextEncoding">TextEncoding</a> | character or glyph encoded size | |
| |
| ## <a name="Class_or_Struct"></a> Class or Struct |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#SkPaint_FontMetrics">FontMetrics</a> | values computed by <a href="undocumented#Font_Manager">Font Manager</a> using <a href="undocumented#Typeface">Typeface</a> | |
| |
| ## <a name="Constructor"></a> Constructor |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#SkPaint_empty_constructor">SkPaint()</a> | constructs with default values | |
| | <a href="#SkPaint_move_SkPaint">SkPaint(SkPaint&& paint)</a> | moves paint without copying it | |
| | <a href="#SkPaint_copy_const_SkPaint">SkPaint(const SkPaint& paint)</a> | makes a shallow copy | |
| | <a href="#SkPaint_destructor">~SkPaint()</a> | decreases <a href="undocumented#Reference_Count">Reference Count</a> of owned objects | |
| |
| ## <a name="Operator"></a> Operator |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#SkPaint_notequal_operator">operator!=(const SkPaint& a, const SkPaint& b)</a> | compares paints for inequality | |
| | <a href="#SkPaint_move_operator">operator=(SkPaint&& paint)</a> | moves paint without copying it | |
| | <a href="#SkPaint_copy_operator">operator=(const SkPaint& paint)</a> | makes a shallow copy | |
| | <a href="#SkPaint_equal_operator">operator==(const SkPaint& a, const SkPaint& b)</a> | compares paints for equality | |
| |
| ## <a name="Member_Function"></a> Member Function |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#SkPaint_breakText">breakText</a> | returns text that fits in a width | |
| | <a href="#SkPaint_canComputeFastBounds">canComputeFastBounds</a> | returns true if settings allow for fast bounds computation | |
| | <a href="#SkPaint_computeFastBounds">computeFastBounds</a> | returns fill bounds for quick reject tests | |
| | <a href="#SkPaint_computeFastStrokeBounds">computeFastStrokeBounds</a> | returns stroke bounds for quick reject tests | |
| | <a href="#SkPaint_containsText">containsText</a> | returns if all text corresponds to <a href="undocumented#Glyph">Glyphs</a> | |
| | <a href="#SkPaint_countText">countText</a> | returns number of <a href="undocumented#Glyph">Glyphs</a> in text | |
| | <a href="#SkPaint_doComputeFastBounds">doComputeFastBounds</a> | returns bounds for quick reject tests | |
| | <a href="#SkPaint_getAlpha">getAlpha</a> | returns <a href="SkColor_Reference#Alpha">Color Alpha</a>, color opacity | |
| | <a href="#SkPaint_getBlendMode">getBlendMode</a> | returns <a href="undocumented#Blend_Mode">Blend Mode</a>, how colors combine with <a href="undocumented#Device">Device</a> | |
| | <a href="#SkPaint_getColor">getColor</a> | returns <a href="SkColor_Reference#Alpha">Color Alpha</a> and <a href="SkColor_Reference#RGB">Color RGB</a>, one drawing color | |
| | <a href="#SkPaint_getColorFilter">getColorFilter</a> | returns <a href="undocumented#Color_Filter">Color Filter</a>, how colors are altered | |
| | <a href="#SkPaint_getDrawLooper">getDrawLooper</a> | returns <a href="undocumented#Draw_Looper">Draw Looper</a>, multiple layers | |
| | <a href="#SkPaint_getFillPath">getFillPath</a> | returns fill path equivalent to stroke | |
| | <a href="#SkPaint_getFilterQuality">getFilterQuality</a> | returns <a href="undocumented#Filter_Quality">Filter Quality</a>, image filtering level | |
| | <a href="#SkPaint_getFlags">getFlags</a> | returns <a href="#SkPaint_Flags">Flags</a> stored in a bit field | |
| | <a href="#SkPaint_getFontBounds">getFontBounds</a> | returns union all glyph bounds | |
| | <a href="#SkPaint_getFontMetrics">getFontMetrics</a> | returns <a href="undocumented#Typeface">Typeface</a> metrics scaled by text size | |
| | <a href="#SkPaint_getFontSpacing">getFontSpacing</a> | returns recommended spacing between lines | |
| | <a href="#SkPaint_getHash">getHash</a> | returns a shallow hash for equality checks | |
| | <a href="#SkPaint_getHinting">getHinting</a> | returns <a href="#SkPaint_Hinting">Hinting</a>, glyph outline adjustment level | |
| | <a href="#SkPaint_getImageFilter">getImageFilter</a> | returns <a href="undocumented#Image_Filter">Image Filter</a>, alter pixels; blur | |
| | <a href="#SkPaint_getMaskFilter">getMaskFilter</a> | returns <a href="undocumented#Mask_Filter">Mask Filter</a>, alterations to <a href="undocumented#Mask_Alpha">Mask Alpha</a> | |
| | <a href="#SkPaint_getPathEffect">getPathEffect</a> | returns <a href="undocumented#Path_Effect">Path Effect</a>, modifications to path geometry; dashing | |
| | <a href="#SkPaint_getPosTextHIntercepts">getPosTextHIntercepts</a> | returns where lines intersect horizontally positioned text; underlines | |
| | <a href="#SkPaint_getPosTextIntercepts">getPosTextIntercepts</a> | returns where lines intersect positioned text; underlines | |
| | <a href="#SkPaint_getPosTextPath">getPosTextPath</a> | returns <a href="SkPath_Reference#Path">Path</a> equivalent to positioned text | |
| | <a href="#SkPaint_getShader">getShader</a> | returns <a href="undocumented#Shader">Shader</a>, multiple drawing colors; gradients | |
| | <a href="#SkPaint_getStrokeCap">getStrokeCap</a> | returns <a href="#SkPaint_Cap">Cap</a>, the area drawn at path ends | |
| | <a href="#SkPaint_getStrokeJoin">getStrokeJoin</a> | returns <a href="#SkPaint_Join">Join</a>, geometry on path corners | |
| | <a href="#SkPaint_getStrokeMiter">getStrokeMiter</a> | returns <a href="#Miter_Limit">Miter Limit</a>, angles with sharp corners | |
| | <a href="#SkPaint_getStrokeWidth">getStrokeWidth</a> | returns thickness of the stroke | |
| | <a href="#SkPaint_getStyle">getStyle</a> | returns <a href="#SkPaint_Style">Style</a>: stroke, fill, or both | |
| | <a href="#SkPaint_getTextAlign">getTextAlign</a> | returns <a href="#SkPaint_Align">Align</a>: left, center, or right | |
| | <a href="#SkPaint_getTextBlobIntercepts">getTextBlobIntercepts</a> | returns where lines intersect <a href="undocumented#Text_Blob">Text Blob</a>; underlines | |
| | <a href="#SkPaint_getTextEncoding">getTextEncoding</a> | returns character or glyph encoded size | |
| | <a href="#SkPaint_getTextIntercepts">getTextIntercepts</a> | returns where lines intersect text; underlines | |
| | <a href="#SkPaint_getTextPath">getTextPath</a> | returns <a href="SkPath_Reference#Path">Path</a> equivalent to text | |
| | <a href="#SkPaint_getTextScaleX">getTextScaleX</a> | returns the text horizontal scale; condensed text | |
| | <a href="#SkPaint_getTextSize">getTextSize</a> | returns text size in points | |
| | <a href="#SkPaint_getTextSkewX">getTextSkewX</a> | returns the text horizontal skew; oblique text | |
| | <a href="#SkPaint_getTextWidths">getTextWidths</a> | returns advance and bounds for each glyph in text | |
| | <a href="#SkPaint_getTypeface">getTypeface</a> | returns <a href="undocumented#Typeface">Typeface</a>, font description | |
| | <a href="#SkPaint_glyphsToUnichars">glyphsToUnichars</a> | converts <a href="undocumented#Glyph">Glyphs</a> into text | |
| | <a href="#SkPaint_isAntiAlias">isAntiAlias</a> | returns true if Anti-alias is set | |
| | <a href="#SkPaint_isAutohinted">isAutohinted</a> | returns true if <a href="undocumented#Glyph">Glyphs</a> are always hinted | |
| | <a href="#SkPaint_isDither">isDither</a> | returns true if <a href="#Dither">Dither</a> is set | |
| | <a href="#SkPaint_isEmbeddedBitmapText">isEmbeddedBitmapText</a> | returns true if <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a> is set | |
| | <a href="#SkPaint_isFakeBoldText">isFakeBoldText</a> | returns true if <a href="#Fake_Bold">Fake Bold</a> is set | |
| | <a href="#SkPaint_isLCDRenderText">isLCDRenderText</a> | returns true if <a href="#LCD_Text">LCD Text</a> is set | |
| | <a href="#SkPaint_isLinearText">isLinearText</a> | returns true if text is converted to <a href="SkPath_Reference#Path">Path</a> | |
| | <a href="#SkPaint_isSrcOver">isSrcOver</a> | returns true if <a href="undocumented#Blend_Mode">Blend Mode</a> is <a href="undocumented#SkBlendMode_kSrcOver">SkBlendMode::kSrcOver</a> | |
| | <a href="#SkPaint_isSubpixelText">isSubpixelText</a> | returns true if <a href="#Subpixel_Text">Subpixel Text</a> is set | |
| | <a href="#SkPaint_isVerticalText">isVerticalText</a> | returns true if <a href="#Vertical_Text">Vertical Text</a> is set | |
| | <a href="#SkPaint_measureText">measureText</a> | returns advance width and bounds of text | |
| | <a href="#SkPaint_nothingToDraw">nothingToDraw</a> | returns true if <a href="#Paint">Paint</a> prevents all drawing | |
| | <a href="#SkPaint_refColorFilter">refColorFilter</a> | references <a href="undocumented#Color_Filter">Color Filter</a>, how colors are altered | |
| | <a href="#SkPaint_refDrawLooper">refDrawLooper</a> | references <a href="undocumented#Draw_Looper">Draw Looper</a>, multiple layers | |
| | <a href="#SkPaint_refImageFilter">refImageFilter</a> | references <a href="undocumented#Image_Filter">Image Filter</a>, alter pixels; blur | |
| | <a href="#SkPaint_refMaskFilter">refMaskFilter</a> | references <a href="undocumented#Mask_Filter">Mask Filter</a>, alterations to <a href="undocumented#Mask_Alpha">Mask Alpha</a> | |
| | <a href="#SkPaint_refPathEffect">refPathEffect</a> | references <a href="undocumented#Path_Effect">Path Effect</a>, modifications to path geometry; dashing | |
| | <a href="#SkPaint_refShader">refShader</a> | references <a href="undocumented#Shader">Shader</a>, multiple drawing colors; gradients | |
| | <a href="#SkPaint_refTypeface">refTypeface</a> | references <a href="undocumented#Typeface">Typeface</a>, font description | |
| | <a href="#SkPaint_reset">reset</a> | sets to default values | |
| | <a href="#SkPaint_setARGB">setARGB</a> | sets color by component | |
| | <a href="#SkPaint_setAlpha">setAlpha</a> | sets <a href="SkColor_Reference#Alpha">Color Alpha</a>, color opacity | |
| | <a href="#SkPaint_setAntiAlias">setAntiAlias</a> | sets or clears Anti-alias | |
| | <a href="#SkPaint_setAutohinted">setAutohinted</a> | sets <a href="undocumented#Glyph">Glyphs</a> to always be hinted | |
| | <a href="#SkPaint_setBlendMode">setBlendMode</a> | sets <a href="undocumented#Blend_Mode">Blend Mode</a>, how colors combine with destination | |
| | <a href="#SkPaint_setColor">setColor</a> | sets <a href="SkColor_Reference#Alpha">Color Alpha</a> and <a href="SkColor_Reference#RGB">Color RGB</a>, one drawing color | |
| | <a href="#SkPaint_setColorFilter">setColorFilter</a> | sets <a href="undocumented#Color_Filter">Color Filter</a>, alters color | |
| | <a href="#SkPaint_setDither">setDither</a> | sets or clears <a href="#Dither">Dither</a> | |
| | <a href="#SkPaint_setDrawLooper">setDrawLooper</a> | sets <a href="undocumented#Draw_Looper">Draw Looper</a>, multiple layers | |
| | <a href="#SkPaint_setEmbeddedBitmapText">setEmbeddedBitmapText</a> | sets or clears <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a> | |
| | <a href="#SkPaint_setFakeBoldText">setFakeBoldText</a> | sets or clears <a href="#Fake_Bold">Fake Bold</a> | |
| | <a href="#SkPaint_setFilterQuality">setFilterQuality</a> | sets <a href="undocumented#Filter_Quality">Filter Quality</a>, the image filtering level | |
| | <a href="#SkPaint_setFlags">setFlags</a> | sets multiple <a href="#SkPaint_Flags">Flags</a> in a bit field | |
| | <a href="#SkPaint_setHinting">setHinting</a> | sets <a href="#SkPaint_Hinting">Hinting</a>, glyph outline adjustment level | |
| | <a href="#SkPaint_setImageFilter">setImageFilter</a> | sets <a href="undocumented#Image_Filter">Image Filter</a>, alter pixels; blur | |
| | <a href="#SkPaint_setLCDRenderText">setLCDRenderText</a> | sets or clears <a href="#LCD_Text">LCD Text</a> | |
| | <a href="#SkPaint_setLinearText">setLinearText</a> | converts to <a href="SkPath_Reference#Path">Path</a> before draw or measure | |
| | <a href="#SkPaint_setMaskFilter">setMaskFilter</a> | sets <a href="undocumented#Mask_Filter">Mask Filter</a>, alterations to <a href="undocumented#Mask_Alpha">Mask Alpha</a> | |
| | <a href="#SkPaint_setPathEffect">setPathEffect</a> | sets <a href="undocumented#Path_Effect">Path Effect</a>, modifications to path geometry; dashing | |
| | <a href="#SkPaint_setShader">setShader</a> | sets <a href="undocumented#Shader">Shader</a>, multiple drawing colors; gradients | |
| | <a href="#SkPaint_setStrokeCap">setStrokeCap</a> | sets <a href="#SkPaint_Cap">Cap</a>, the area drawn at path ends | |
| | <a href="#SkPaint_setStrokeJoin">setStrokeJoin</a> | sets <a href="#SkPaint_Join">Join</a>, geometry on path corners | |
| | <a href="#SkPaint_setStrokeMiter">setStrokeMiter</a> | sets <a href="#Miter_Limit">Miter Limit</a>, angles with sharp corners | |
| | <a href="#SkPaint_setStrokeWidth">setStrokeWidth</a> | sets thickness of the stroke | |
| | <a href="#SkPaint_setStyle">setStyle</a> | sets <a href="#SkPaint_Style">Style</a>: stroke, fill, or both | |
| | <a href="#SkPaint_setSubpixelText">setSubpixelText</a> | sets or clears <a href="#Subpixel_Text">Subpixel Text</a> | |
| | <a href="#SkPaint_setTextAlign">setTextAlign</a> | sets <a href="#SkPaint_Align">Align</a>: left, center, or right | |
| | <a href="#SkPaint_setTextEncoding">setTextEncoding</a> | sets character or glyph encoded size | |
| | <a href="#SkPaint_setTextScaleX">setTextScaleX</a> | sets the text horizontal scale; condensed text | |
| | <a href="#SkPaint_setTextSize">setTextSize</a> | sets text size in points | |
| | <a href="#SkPaint_setTextSkewX">setTextSkewX</a> | sets the text horizontal skew; oblique text | |
| | <a href="#SkPaint_setTypeface">setTypeface</a> | sets <a href="undocumented#Typeface">Typeface</a>, font description | |
| | <a href="#SkPaint_setVerticalText">setVerticalText</a> | sets or clears <a href="#Vertical_Text">Vertical Text</a> | |
| | <a href="#SkPaint_textToGlyphs">textToGlyphs</a> | converts text into glyph indices | |
| | <a href="#SkPaint_toString">toString</a> | converts <a href="#Paint">Paint</a> to machine readable form | |
| |
| ## <a name="Initializers"></a> Initializers |
| |
| <a name="SkPaint_empty_constructor"></a> |
| ## SkPaint |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkPaint() |
| </pre> |
| |
| Constructs <a href="#Paint">Paint</a> with default values. |
| |
| | attribute | default value | |
| | --- | --- | |
| | Anti-alias | false | |
| | <a href="undocumented#Blend_Mode">Blend Mode</a> | <a href="undocumented#SkBlendMode_kSrcOver">SkBlendMode::kSrcOver</a> | |
| | <a href="SkColor_Reference#Color">Color</a> | <a href="SkColor_Reference#SK_ColorBLACK">SK ColorBLACK</a> | |
| | <a href="SkColor_Reference#Alpha">Color Alpha</a> | 255 | |
| | <a href="undocumented#Color_Filter">Color Filter</a> | nullptr | |
| | <a href="#Dither">Dither</a> | false | |
| | <a href="undocumented#Draw_Looper">Draw Looper</a> | nullptr | |
| | <a href="#Fake_Bold">Fake Bold</a> | false | |
| | <a href="undocumented#Filter_Quality">Filter Quality</a> | <a href="undocumented#kNone_SkFilterQuality">kNone_SkFilterQuality</a> | |
| | <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a> | false | |
| | <a href="#Automatic_Hinting">Automatic Hinting</a> | false | |
| | <a href="#Full_Hinting_Spacing">Full Hinting Spacing</a> | false | |
| | <a href="#SkPaint_Hinting">Hinting</a> | <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a> | |
| | <a href="undocumented#Image_Filter">Image Filter</a> | nullptr | |
| | <a href="#LCD_Text">LCD Text</a> | false | |
| | <a href="#Linear_Text">Linear Text</a> | false | |
| | <a href="#Miter_Limit">Miter Limit</a> | 4 | |
| | <a href="undocumented#Mask_Filter">Mask Filter</a> | nullptr | |
| | <a href="undocumented#Path_Effect">Path Effect</a> | nullptr | |
| | <a href="undocumented#Shader">Shader</a> | nullptr | |
| | <a href="#SkPaint_Style">Style</a> | <a href="#SkPaint_kFill_Style">kFill Style</a> | |
| | <a href="#Text_Align">Text Align</a> | <a href="#SkPaint_kLeft_Align">kLeft Align</a> | |
| | <a href="#Text_Encoding">Text Encoding</a> | <a href="#SkPaint_kUTF8_TextEncoding">kUTF8 TextEncoding</a> | |
| | <a href="#Text_Scale_X">Text Scale X</a> | 1 | |
| | <a href="#Text_Size">Text Size</a> | 12 | |
| | <a href="#Text_Skew_X">Text Skew X</a> | 0 | |
| | <a href="undocumented#Typeface">Typeface</a> | nullptr | |
| | <a href="#Stroke_Cap">Stroke Cap</a> | <a href="#SkPaint_kButt_Cap">kButt Cap</a> | |
| | <a href="#Stroke_Join">Stroke Join</a> | <a href="#SkPaint_kMiter_Join">kMiter Join</a> | |
| | <a href="#Stroke_Width">Stroke Width</a> | 0 | |
| | <a href="#Subpixel_Text">Subpixel Text</a> | false | |
| | <a href="#Vertical_Text">Vertical Text</a> | 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 <a href="#Paint">Paint</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="c4b2186d85c142a481298f7144295ffd"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_copy_const_SkPaint"></a> |
| ## SkPaint |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkPaint(const SkPaint& paint) |
| </pre> |
| |
| Makes a shallow copy of <a href="#Paint">Paint</a>. <a href="undocumented#Typeface">Typeface</a>, <a href="undocumented#Path_Effect">Path Effect</a>, <a href="undocumented#Shader">Shader</a>, |
| <a href="undocumented#Mask_Filter">Mask Filter</a>, <a href="undocumented#Color_Filter">Color Filter</a>, <a href="undocumented#Draw_Looper">Draw Looper</a>, and <a href="undocumented#Image_Filter">Image Filter</a> are shared |
| between the original <a href="#SkPaint_copy_const_SkPaint_paint">paint</a> and the copy. Objects containing <a href="undocumented#Reference_Count">Reference Count</a> increment |
| their references by one. |
| |
| The referenced objects <a href="undocumented#Path_Effect">Path Effect</a>, <a href="undocumented#Shader">Shader</a>, <a href="undocumented#Mask_Filter">Mask Filter</a>, <a href="undocumented#Color_Filter">Color Filter</a>, |
| <a href="undocumented#Draw_Looper">Draw Looper</a>, and <a href="undocumented#Image_Filter">Image Filter</a> cannot be modified after they are created. |
| This prevents objects with <a href="undocumented#Reference_Count">Reference Count</a> from being modified once <a href="#Paint">Paint</a> refers to them. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_copy_const_SkPaint_paint"> <code><strong>paint </strong></code> </a></td> <td> |
| original to copy</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| shallow copy of <a href="#SkPaint_copy_const_SkPaint_paint">paint</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="b99971ad0ef243d617925289d963b62d"> |
| |
| #### Example Output |
| |
| ~~~~ |
| SK_ColorRED == paint1.getColor() |
| SK_ColorBLUE == paint2.getColor() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_move_SkPaint"></a> |
| ## SkPaint |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkPaint(SkPaint&& paint) |
| </pre> |
| |
| Implements a move constructor to avoid increasing the reference counts |
| of objects referenced by the <a href="#SkPaint_move_SkPaint_paint">paint</a>. |
| |
| After the call, <a href="#SkPaint_move_SkPaint_paint">paint</a> is undefined, and can be safely destructed. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_move_SkPaint_paint"> <code><strong>paint </strong></code> </a></td> <td> |
| original to move</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| content of <a href="#SkPaint_move_SkPaint_paint">paint</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="8ed1488a503cd5282b86a51614aa90b1"> |
| |
| #### Example Output |
| |
| ~~~~ |
| path effect unique: true |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_reset"></a> |
| ## reset |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void reset() |
| </pre> |
| |
| Sets all <a href="#Paint">Paint</a> contents to their initial values. This is equivalent to replacing |
| <a href="#Paint">Paint</a> with the result of <a href="#SkPaint_empty_constructor">SkPaint()</a>. |
| |
| ### Example |
| |
| <div><fiddle-embed name="ef269937ade7e7353635121d9a64f9f7"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_destructor"></a> |
| ## ~SkPaint |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| ~SkPaint() |
| </pre> |
| |
| Decreases <a href="#Paint">Paint</a> <a href="undocumented#Reference_Count">Reference Count</a> of owned objects: <a href="undocumented#Typeface">Typeface</a>, <a href="undocumented#Path_Effect">Path Effect</a>, <a href="undocumented#Shader">Shader</a>, |
| <a href="undocumented#Mask_Filter">Mask Filter</a>, <a href="undocumented#Color_Filter">Color Filter</a>, <a href="undocumented#Draw_Looper">Draw Looper</a>, and <a href="undocumented#Image_Filter">Image Filter</a>. If the |
| objects containing <a href="undocumented#Reference_Count">Reference Count</a> go to zero, they are deleted. |
| |
| --- |
| |
| ## <a name="Management"></a> Management |
| |
| <a name="SkPaint_copy_operator"></a> |
| ## operator= |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkPaint& operator=(const SkPaint& paint) |
| </pre> |
| |
| Makes a shallow copy of <a href="#Paint">Paint</a>. <a href="undocumented#Typeface">Typeface</a>, <a href="undocumented#Path_Effect">Path Effect</a>, <a href="undocumented#Shader">Shader</a>, |
| <a href="undocumented#Mask_Filter">Mask Filter</a>, <a href="undocumented#Color_Filter">Color Filter</a>, <a href="undocumented#Draw_Looper">Draw Looper</a>, and <a href="undocumented#Image_Filter">Image Filter</a> are shared |
| between the original <a href="#SkPaint_copy_operator_paint">paint</a> and the copy. Objects containing <a href="undocumented#Reference_Count">Reference Count</a> in the |
| prior destination are decreased by one, and the referenced objects are deleted if the |
| resulting count is zero. Objects containing <a href="undocumented#Reference_Count">Reference Count</a> in the parameter <a href="#SkPaint_copy_operator_paint">paint</a> |
| are increased by one. <a href="#SkPaint_copy_operator_paint">paint</a> is unmodified. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_copy_operator_paint"> <code><strong>paint </strong></code> </a></td> <td> |
| original to copy</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| content of <a href="#SkPaint_copy_operator_paint">paint</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="b476a9088f80dece176ed577807d3992"> |
| |
| #### Example Output |
| |
| ~~~~ |
| SK_ColorRED == paint1.getColor() |
| SK_ColorRED == paint2.getColor() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_move_operator"></a> |
| ## operator= |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkPaint& operator=(SkPaint&& paint) |
| </pre> |
| |
| Moves the <a href="#SkPaint_move_operator_paint">paint</a> to avoid increasing the reference counts |
| of objects referenced by the <a href="#SkPaint_move_operator_paint">paint</a> parameter. Objects containing <a href="undocumented#Reference_Count">Reference Count</a> in the |
| prior destination are decreased by one; those objects are deleted if the resulting count |
| is zero. |
| |
| After the call, <a href="#SkPaint_move_operator_paint">paint</a> is undefined, and can be safely destructed. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_move_operator_paint"> <code><strong>paint </strong></code> </a></td> <td> |
| original to move</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| content of <a href="#SkPaint_move_operator_paint">paint</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="9fb7459b097d713f5f1fe5675afe14f5"> |
| |
| #### Example Output |
| |
| ~~~~ |
| SK_ColorRED == paint2.getColor() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_equal_operator"></a> |
| ## operator== |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool operator==(const SkPaint& a, const SkPaint& b) |
| </pre> |
| |
| Compares <a href="#SkPaint_equal_operator_a">a</a> and <a href="#SkPaint_equal_operator_b">b</a>, and returns true if <a href="#SkPaint_equal_operator_a">a</a> and <a href="#SkPaint_equal_operator_b">b</a> are equivalent. May return false |
| if <a href="undocumented#Typeface">Typeface</a>, <a href="undocumented#Path_Effect">Path Effect</a>, <a href="undocumented#Shader">Shader</a>, <a href="undocumented#Mask_Filter">Mask Filter</a>, <a href="undocumented#Color_Filter">Color Filter</a>, |
| <a href="undocumented#Draw_Looper">Draw Looper</a>, or <a href="undocumented#Image_Filter">Image Filter</a> have identical contents but different pointers. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_equal_operator_a"> <code><strong>a </strong></code> </a></td> <td> |
| <a href="#Paint">Paint</a> to compare</td> |
| </tr> <tr> <td><a name="SkPaint_equal_operator_b"> <code><strong>b </strong></code> </a></td> <td> |
| <a href="#Paint">Paint</a> to compare</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if <a href="#Paint">Paint</a> pair are equivalent |
| |
| ### Example |
| |
| <div><fiddle-embed name="7481a948e34672720337a631830586dd"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| paint1 != paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_notequal_operator">operator!=(const SkPaint& a, const SkPaint& b)</a> |
| |
| --- |
| |
| <a name="SkPaint_notequal_operator"></a> |
| ## operator!= |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool operator!=(const SkPaint& a, const SkPaint& b) |
| </pre> |
| |
| Compares <a href="#SkPaint_notequal_operator_a">a</a> and <a href="#SkPaint_notequal_operator_b">b</a>, and returns true if <a href="#SkPaint_notequal_operator_a">a</a> and <a href="#SkPaint_notequal_operator_b">b</a> are not equivalent. May return true |
| if <a href="undocumented#Typeface">Typeface</a>, <a href="undocumented#Path_Effect">Path Effect</a>, <a href="undocumented#Shader">Shader</a>, <a href="undocumented#Mask_Filter">Mask Filter</a>, <a href="undocumented#Color_Filter">Color Filter</a>, |
| <a href="undocumented#Draw_Looper">Draw Looper</a>, or <a href="undocumented#Image_Filter">Image Filter</a> have identical contents but different pointers. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_notequal_operator_a"> <code><strong>a </strong></code> </a></td> <td> |
| <a href="#Paint">Paint</a> to compare</td> |
| </tr> <tr> <td><a name="SkPaint_notequal_operator_b"> <code><strong>b </strong></code> </a></td> <td> |
| <a href="#Paint">Paint</a> to compare</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if <a href="#Paint">Paint</a> pair are not equivalent |
| |
| ### Example |
| |
| <div><fiddle-embed name="b6c8484b1187f555b435ad5369833be4"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_equal_operator">operator==(const SkPaint& a, const SkPaint& b)</a> |
| |
| --- |
| |
| <a name="SkPaint_getHash"></a> |
| ## getHash |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| uint32_t getHash() const |
| </pre> |
| |
| Returns a hash generated from <a href="#Paint">Paint</a> values and pointers. |
| Identical hashes guarantee that the paints are |
| equivalent, but differing hashes do not guarantee that the paints have differing |
| contents. |
| |
| If <a href="#SkPaint_equal_operator">operator==(const SkPaint& a, const SkPaint& b)</a> returns true for two paints, |
| their hashes are also equal. |
| |
| The hash returned is platform and implementation specific. |
| |
| ### Return Value |
| |
| a shallow hash |
| |
| ### Example |
| |
| <div><fiddle-embed name="7f7e1b701361912b344f90ae6b530393"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| paint1.getHash() == paint2.getHash() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Hinting"></a> Hinting |
| |
| ## <a name="SkPaint_Hinting"></a> Enum SkPaint::Hinting |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#Hinting">Hinting</a> { |
| <a href="#SkPaint_kNo_Hinting">kNo Hinting</a> = 0, |
| <a href="#SkPaint_kSlight_Hinting">kSlight Hinting</a> = 1, |
| <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a> = 2, |
| <a href="#SkPaint_kFull_Hinting">kFull Hinting</a> = 3, |
| }; |
| </pre> |
| |
| <a href="#Hinting">Hinting</a> adjusts the glyph outlines so that the shape provides a uniform |
| look at a given point size on font engines that support it. <a href="#Hinting">Hinting</a> 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 <a href="undocumented#Engine">Font Engine</a>. |
| |
| ### Constants |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kNo_Hinting"> <code><strong>SkPaint::kNo_Hinting </strong></code> </a></td><td>0</td><td>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. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kSlight_Hinting"> <code><strong>SkPaint::kSlight_Hinting </strong></code> </a></td><td>1</td><td>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 <a href="undocumented#Glyph">Glyphs</a> may be fuzzy but better resemble their original shape. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kNormal_Hinting"> <code><strong>SkPaint::kNormal_Hinting </strong></code> </a></td><td>2</td><td>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. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kFull_Hinting"> <code><strong>SkPaint::kFull_Hinting </strong></code> </a></td><td>3</td><td>Modifies glyph outlines for maxiumum constrast. With FreeType, this selects |
| FT_LOAD_TARGET_LCD or FT_LOAD_TARGET_LCD_V if <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> 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. |
| </td> |
| </tr> |
| </table> |
| |
| On Windows with DirectWrite, <a href="#Hinting">Hinting</a> has no effect. |
| |
| <a href="#Hinting">Hinting</a> defaults to <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a>. |
| Set <a href="undocumented#SkPaintDefaults_Hinting">SkPaintDefaults Hinting</a> at compile time to change the default setting. |
| |
| |
| |
| <a name="SkPaint_getHinting"></a> |
| ## getHinting |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| Hinting getHinting() const |
| </pre> |
| |
| Returns level of glyph outline adjustment. |
| |
| ### Return Value |
| |
| one of: <a href="#SkPaint_kNo_Hinting">kNo Hinting</a>, <a href="#SkPaint_kSlight_Hinting">kSlight Hinting</a>, <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a>, <a href="#SkPaint_kFull_Hinting">kFull Hinting</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="329e2e5a5919ac431e1c58878a5b99e0"> |
| |
| #### Example Output |
| |
| ~~~~ |
| SkPaint::kNormal_Hinting == paint.getHinting() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setHinting"></a> |
| ## setHinting |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setHinting(Hinting hintingLevel) |
| </pre> |
| |
| Sets level of glyph outline adjustment. |
| Does not check for valid values of <a href="#SkPaint_setHinting_hintingLevel">hintingLevel</a>. |
| |
| | <a href="#Hinting">Hinting</a> | value | effect on generated glyph outlines | |
| | --- | --- | --- | |
| | <a href="#SkPaint_kNo_Hinting">kNo Hinting</a> | 0 | leaves glyph outlines unchanged from their native representation | |
| | <a href="#SkPaint_kSlight_Hinting">kSlight Hinting</a> | 1 | modifies glyph outlines minimally to improve contrast | |
| | <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a> | 2 | modifies glyph outlines to improve contrast | |
| | <a href="#SkPaint_kFull_Hinting">kFull Hinting</a> | 3 | modifies glyph outlines for maximum contrast | |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setHinting_hintingLevel"> <code><strong>hintingLevel </strong></code> </a></td> <td> |
| one of: <a href="#SkPaint_kNo_Hinting">kNo Hinting</a>, <a href="#SkPaint_kSlight_Hinting">kSlight Hinting</a>, <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a>, <a href="#SkPaint_kFull_Hinting">kFull Hinting</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="78153fbd3f1000cb33b97bbe831ed34e"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Flags"></a> Flags |
| |
| ## <a name="SkPaint_Flags"></a> Enum SkPaint::Flags |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#Flags">Flags</a> { |
| <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> = 0x01, |
| <a href="#SkPaint_kDither_Flag">kDither Flag</a> = 0x04, |
| <a href="#SkPaint_kFakeBoldText_Flag">kFakeBoldText Flag</a> = 0x20, |
| <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a> = 0x40, |
| <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> = 0x80, |
| <a href="#SkPaint_kDevKernText_Flag">kDevKernText Flag</a> = 0x100, |
| <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> = 0x200, |
| <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> = 0x400, |
| <a href="#SkPaint_kAutoHinting_Flag">kAutoHinting Flag</a> = 0x800, |
| <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> = 0x1000, |
| |
| <a href="#SkPaint_kAllFlags">kAllFlags</a> = 0xFFFF, |
| }; |
| |
| </pre> |
| |
| The bit values stored in <a href="#Flags">Flags</a>. |
| The default value for <a href="#Flags">Flags</a>, normally zero, can be changed at compile time |
| with a custom definition of <a href="undocumented#SkPaintDefaults_Flags">SkPaintDefaults Flags</a>. |
| All flags can be read and written explicitly; <a href="#Flags">Flags</a> allows manipulating |
| multiple settings at once. |
| |
| ### Constants |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kAntiAlias_Flag"> <code><strong>SkPaint::kAntiAlias_Flag </strong></code> </a></td><td>0x0001</td><td>mask for setting Anti-alias</td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kDither_Flag"> <code><strong>SkPaint::kDither_Flag </strong></code> </a></td><td>0x0004</td><td>mask for setting <a href="#Dither">Dither</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kFakeBoldText_Flag"> <code><strong>SkPaint::kFakeBoldText_Flag </strong></code> </a></td><td>0x0020</td><td>mask for setting <a href="#Fake_Bold">Fake Bold</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kLinearText_Flag"> <code><strong>SkPaint::kLinearText_Flag </strong></code> </a></td><td>0x0040</td><td>mask for setting <a href="#Linear_Text">Linear Text</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kSubpixelText_Flag"> <code><strong>SkPaint::kSubpixelText_Flag </strong></code> </a></td><td>0x0080</td><td>mask for setting <a href="#Subpixel_Text">Subpixel Text</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kDevKernText_Flag"> <code><strong>SkPaint::kDevKernText_Flag </strong></code> </a></td><td>0x0100</td><td></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kLCDRenderText_Flag"> <code><strong>SkPaint::kLCDRenderText_Flag </strong></code> </a></td><td>0x0200</td><td>mask for setting <a href="#LCD_Text">LCD Text</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kEmbeddedBitmapText_Flag"> <code><strong>SkPaint::kEmbeddedBitmapText_Flag </strong></code> </a></td><td>0x0400</td><td>mask for setting <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kAutoHinting_Flag"> <code><strong>SkPaint::kAutoHinting_Flag </strong></code> </a></td><td>0x0800</td><td>mask for setting <a href="#Automatic_Hinting">Automatic Hinting</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kVerticalText_Flag"> <code><strong>SkPaint::kVerticalText_Flag </strong></code> </a></td><td>0x1000</td><td>mask for setting <a href="#Vertical_Text">Vertical Text</a></td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kAllFlags"> <code><strong>SkPaint::kAllFlags </strong></code> </a></td><td>0xFFFF</td><td>mask of all <a href="#Flags">Flags</a>, including private flags and flags reserved for future use</td> |
| </tr> |
| <a href="#Flags">Flags</a> default to all flags clear, disabling the associated feature. |
| |
| |
| |
| ## <a name="SkPaint_ReserveFlags"></a> Enum SkPaint::ReserveFlags |
| |
| soonOnly valid for Android framework. |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#SkPaint_ReserveFlags">ReserveFlags</a> { |
| <a href="#SkPaint_kUnderlineText_ReserveFlag">kUnderlineText ReserveFlag</a> = 0x08, |
| <a href="#SkPaint_kStrikeThruText_ReserveFlag">kStrikeThruText ReserveFlag</a> = 0x10, |
| }; |
| </pre> |
| |
| ### Constants |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kUnderlineText_ReserveFlag"> <code><strong>SkPaint::kUnderlineText_ReserveFlag </strong></code> </a></td><td>0x0008</td><td>soon</td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kStrikeThruText_ReserveFlag"> <code><strong>SkPaint::kStrikeThruText_ReserveFlag </strong></code> </a></td><td>0x0010</td><td>soon</td> |
| </tr> |
| |
| |
| |
| <a name="SkPaint_getFlags"></a> |
| ## getFlags |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| uint32_t getFlags() const |
| </pre> |
| |
| Returns paint settings described by <a href="#Flags">Flags</a>. Each setting uses one |
| bit, and can be tested with <a href="#Flags">Flags</a> members. |
| |
| ### Return Value |
| |
| zero, one, or more bits described by <a href="#Flags">Flags</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="8a3f8c309533388b01aa66e1267f322d"> |
| |
| #### Example Output |
| |
| ~~~~ |
| (SkPaint::kAntiAlias_Flag & paint.getFlags()) != 0 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setFlags"></a> |
| ## setFlags |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setFlags(uint32_t flags) |
| </pre> |
| |
| Replaces <a href="#Flags">Flags</a> with <a href="#SkPaint_setFlags_flags">flags</a>, the union of the <a href="#Flags">Flags</a> members. |
| All <a href="#Flags">Flags</a> members may be cleared, or one or more may be set. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setFlags_flags"> <code><strong>flags </strong></code> </a></td> <td> |
| union of <a href="#Flags">Flags</a> for <a href="#Paint">Paint</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="54baed3f6bc4b9c31ba664e27767fdc7"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isAntiAlias() |
| paint.isDither() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Anti-alias"></a> Anti-alias |
| |
| Anti-alias drawing approximates partial pixel coverage with transparency. |
| If <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> is clear, pixel centers contained by the shape edge are drawn opaque. |
| If <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> is set, pixels are drawn with <a href="SkColor_Reference#Alpha">Color Alpha</a> equal to their coverage. |
| |
| The rule for <a href="undocumented#Alias">Aliased</a> pixels is inconsistent across platforms. A shape edge |
| passing through the pixel center may, but is not required to, draw the pixel. |
| |
| <a href="undocumented#Raster_Engine">Raster Engine</a> draws <a href="undocumented#Alias">Aliased</a> pixels whose centers are on or to the right of the start of an |
| active <a href="SkPath_Reference#Path">Path</a> edge, and whose center is to the left of the end of the active <a href="SkPath_Reference#Path">Path</a> edge. |
| |
| A platform may only support Anti-aliased drawing. Some GPU-backed platforms use |
| <a href="undocumented#Supersampling">Supersampling</a> to Anti-alias all drawing, and have no mechanism to selectively |
| <a href="undocumented#Alias">Alias</a>. |
| |
| 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 <a href="undocumented#SkPaintDefaults_Flags">SkPaintDefaults Flags</a> to <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> |
| at compile time. |
| |
| ### Example |
| |
| <div><fiddle-embed name="a6575a49467ce8d28bb01cc7638fa04d"><div>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 <a href="SkBitmap_Reference#Bitmap">Bitmap</a>, then drawn magnified to make the |
| <a href="undocumented#Alias">Aliasing</a> easier to see. |
| </div></fiddle-embed></div> |
| |
| <a name="SkPaint_isAntiAlias"></a> |
| ## isAntiAlias |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isAntiAlias() const |
| </pre> |
| |
| If true, pixels on the active edges of <a href="SkPath_Reference#Path">Path</a> may be drawn with partial transparency. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="d7d5f4f7da7acd5104a652f490c6f7b8"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isAntiAlias() == !!(paint.getFlags() & SkPaint::kAntiAlias_Flag) |
| paint.isAntiAlias() == !!(paint.getFlags() & SkPaint::kAntiAlias_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setAntiAlias"></a> |
| ## setAntiAlias |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setAntiAlias(bool aa) |
| </pre> |
| |
| Requests, but does not require, that <a href="SkPath_Reference#Path">Path</a> edge pixels draw opaque or with |
| partial transparency. |
| |
| Sets <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> if <a href="#SkPaint_setAntiAlias_aa">aa</a> is true. |
| Clears <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> if <a href="#SkPaint_setAntiAlias_aa">aa</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setAntiAlias_aa"> <code><strong>aa </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="c2ff148374d01cbef845b223e725905c"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Dither"></a> Dither |
| |
| <a href="#Dither">Dither</a> 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 <a href="SkImageInfo_Reference#kRGB_565_SkColorType">kRGB_565_SkColorType</a> |
| and <a href="SkImageInfo_Reference#kRGBA_8888_SkColorType">kRGBA_8888_SkColorType</a> gradients, |
| and improves rendering into a <a href="SkImageInfo_Reference#kRGB_565_SkColorType">kRGB_565_SkColorType</a> <a href="SkSurface_Reference#Surface">Surface</a>. |
| |
| Dithering is always enabled for linear gradients drawing into |
| <a href="SkImageInfo_Reference#kRGB_565_SkColorType">kRGB_565_SkColorType</a> <a href="SkSurface_Reference#Surface">Surface</a> and <a href="SkImageInfo_Reference#kRGBA_8888_SkColorType">kRGBA_8888_SkColorType</a> <a href="SkSurface_Reference#Surface">Surface</a>. |
| <a href="#Dither">Dither</a> cannot be enabled for <a href="SkImageInfo_Reference#kAlpha_8_SkColorType">kAlpha_8_SkColorType</a> <a href="SkSurface_Reference#Surface">Surface</a> and |
| <a href="SkImageInfo_Reference#kRGBA_F16_SkColorType">kRGBA_F16_SkColorType</a> <a href="SkSurface_Reference#Surface">Surface</a>. |
| |
| <a href="#Dither">Dither</a> is disabled by default. |
| <a href="#Dither">Dither</a> can be enabled by default by setting <a href="undocumented#SkPaintDefaults_Flags">SkPaintDefaults Flags</a> to <a href="#SkPaint_kDither_Flag">kDither Flag</a> |
| at compile time. |
| |
| Some platform implementations may ignore dithering. SetSK_IGNORE_GPU_DITHERto ignore <a href="#Dither">Dither</a> on <a href="undocumented#GPU_Surface">GPU Surface</a>. |
| |
| ### Example |
| |
| <div><fiddle-embed name="8b26507690b71462f44642b911890bbf"><div>Dithering in the bottom half more closely approximates the requested color by |
| alternating nearby colors from pixel to pixel. |
| </div></fiddle-embed></div> |
| |
| ### Example |
| |
| <div><fiddle-embed name="76d4d4a7931a48495e4d5f54e073be53"><div>Dithering introduces subtle adjustments to color to smooth gradients. |
| Drawing the gradient repeatedly with <a href="undocumented#SkBlendMode_kPlus">SkBlendMode::kPlus</a> exaggerates the |
| dither, making it easier to see. |
| </div></fiddle-embed></div> |
| |
| <a name="SkPaint_isDither"></a> |
| ## isDither |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isDither() const |
| </pre> |
| |
| If true, color error may be distributed to smooth color transition. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kDither_Flag">kDither Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kDither_Flag">kDither Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="f4ce93f6c5e7335436a985377fd980c0"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isDither() == !!(paint.getFlags() & SkPaint::kDither_Flag) |
| paint.isDither() == !!(paint.getFlags() & SkPaint::kDither_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setDither"></a> |
| ## setDither |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setDither(bool dither) |
| </pre> |
| |
| Requests, but does not require, to distribute color error. |
| |
| Sets <a href="#SkPaint_kDither_Flag">kDither Flag</a> if <a href="#SkPaint_setDither_dither">dither</a> is true. |
| Clears <a href="#SkPaint_kDither_Flag">kDither Flag</a> if <a href="#SkPaint_setDither_dither">dither</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setDither_dither"> <code><strong>dither </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kDither_Flag">kDither Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="69b7162e8324d9239dd02dd9ada2bdff"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="SkImageInfo_Reference#kRGB_565_SkColorType">kRGB_565_SkColorType</a> |
| |
| --- |
| |
| ### See Also |
| |
| Gradient <a href="SkColor_Reference#RGB">Color RGB</a>-565 |
| |
| ## <a name="Device_Text"></a> Device Text |
| |
| <a href="#LCD_Text">LCD Text</a> and <a href="#Subpixel_Text">Subpixel Text</a> increase the precision of glyph position. |
| |
| When set, <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> takes advantage of the organization of <a href="SkColor_Reference#RGB">Color RGB</a> stripes that |
| create a color, and relies |
| on the small size of the stripe and visual perception to make the color fringing imperceptible. |
| <a href="#LCD_Text">LCD Text</a> can be enabled on devices that orient stripes horizontally or vertically, and that order |
| the color components as <a href="SkColor_Reference#RGB">Color RGB</a> or <a href="SkColor_Reference#RBG">Color RBG</a>. |
| |
| <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> 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. |
| <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> and <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> are clear by default. |
| <a href="#LCD_Text">LCD Text</a> or <a href="#Subpixel_Text">Subpixel Text</a> can be enabled by default by setting <a href="undocumented#SkPaintDefaults_Flags">SkPaintDefaults Flags</a> to |
| <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> or <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> (or both) at compile time. |
| |
| ### Example |
| |
| <div><fiddle-embed name="4606ae1be792d6bc46d496432f050ee9"><div>Four commas are drawn normally and with combinations of <a href="#LCD_Text">LCD Text</a> and <a href="#Subpixel_Text">Subpixel Text</a>. |
| When <a href="#Subpixel_Text">Subpixel Text</a> is disabled, the comma <a href="undocumented#Glyph">Glyphs</a> are identical, but not evenly spaced. |
| When <a href="#Subpixel_Text">Subpixel Text</a> is enabled, the comma <a href="undocumented#Glyph">Glyphs</a> are unique, but appear evenly spaced. |
| </div></fiddle-embed></div> |
| |
| ## <a name="Linear_Text"></a> Linear Text |
| |
| <a href="#Linear_Text">Linear Text</a> selects whether text is rendered as a <a href="undocumented#Glyph">Glyph</a> or as a <a href="SkPath_Reference#Path">Path</a>. |
| If <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a> is set, it has the same effect as setting <a href="#SkPaint_Hinting">Hinting</a> to <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a>. |
| If <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a> is clear, it is the same as setting <a href="#SkPaint_Hinting">Hinting</a> to <a href="#SkPaint_kNo_Hinting">kNo Hinting</a>. |
| |
| <a name="SkPaint_isLinearText"></a> |
| ## isLinearText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isLinearText() const |
| </pre> |
| |
| If true, text is converted to <a href="SkPath_Reference#Path">Path</a> before drawing and measuring. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="2890ad644f980637837e6fcb386fb462"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_setLinearText">setLinearText</a> <a href="#SkPaint_Hinting">Hinting</a> |
| |
| --- |
| |
| <a name="SkPaint_setLinearText"></a> |
| ## setLinearText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setLinearText(bool linearText) |
| </pre> |
| |
| If true, text is converted to <a href="SkPath_Reference#Path">Path</a> before drawing and measuring. |
| By default, <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a> is clear. |
| |
| Sets <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a> if <a href="#SkPaint_setLinearText_linearText">linearText</a> is true. |
| Clears <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a> if <a href="#SkPaint_setLinearText_linearText">linearText</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setLinearText_linearText"> <code><strong>linearText </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kLinearText_Flag">kLinearText Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="c93bb912f3bddfb4d96d3ad70ada552b"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_isLinearText">isLinearText</a> <a href="#SkPaint_Hinting">Hinting</a> |
| |
| --- |
| |
| ## <a name="Subpixel_Text"></a> Subpixel Text |
| |
| <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> 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. |
| |
| <a name="SkPaint_isSubpixelText"></a> |
| ## isSubpixelText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isSubpixelText() const |
| </pre> |
| |
| If true, <a href="undocumented#Glyph">Glyphs</a> at different sub-pixel positions may differ on pixel edge coverage. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="abe9afc0932e2199324ae6cbb396e67c"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isSubpixelText() == !!(paint.getFlags() & SkPaint::kSubpixelText_Flag) |
| paint.isSubpixelText() == !!(paint.getFlags() & SkPaint::kSubpixelText_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setSubpixelText"></a> |
| ## setSubpixelText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setSubpixelText(bool subpixelText) |
| </pre> |
| |
| Requests, but does not require, that <a href="undocumented#Glyph">Glyphs</a> respect sub-pixel positioning. |
| |
| Sets <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> if <a href="#SkPaint_setSubpixelText_subpixelText">subpixelText</a> is true. |
| Clears <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a> if <a href="#SkPaint_setSubpixelText_subpixelText">subpixelText</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setSubpixelText_subpixelText"> <code><strong>subpixelText </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kSubpixelText_Flag">kSubpixelText Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="a77bbc1a4e3be9a8ab0f842f877c5ee4"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="LCD_Text"></a> LCD Text |
| |
| When set, <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> takes advantage of the organization of <a href="SkColor_Reference#RGB">Color RGB</a> stripes that |
| create a color, and relies |
| on the small size of the stripe and visual perception to make the color fringing imperceptible. |
| <a href="#LCD_Text">LCD Text</a> can be enabled on devices that orient stripes horizontally or vertically, and that order |
| the color components as <a href="SkColor_Reference#RGB">Color RGB</a> or <a href="SkColor_Reference#RBG">Color RBG</a>. |
| |
| <a name="SkPaint_isLCDRenderText"></a> |
| ## isLCDRenderText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isLCDRenderText() const |
| </pre> |
| |
| If true, <a href="undocumented#Glyph">Glyphs</a> may use LCD striping to improve glyph edges. |
| |
| Returns true if <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> is set. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="68e1fd95dd2fd06a333899d2bd2396b9"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isLCDRenderText() == !!(paint.getFlags() & SkPaint::kLCDRenderText_Flag) |
| paint.isLCDRenderText() == !!(paint.getFlags() & SkPaint::kLCDRenderText_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setLCDRenderText"></a> |
| ## setLCDRenderText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setLCDRenderText(bool lcdText) |
| </pre> |
| |
| Requests, but does not require, that <a href="undocumented#Glyph">Glyphs</a> use LCD striping for glyph edges. |
| |
| Sets <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> if <a href="#SkPaint_setLCDRenderText_lcdText">lcdText</a> is true. |
| Clears <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a> if <a href="#SkPaint_setLCDRenderText_lcdText">lcdText</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setLCDRenderText_lcdText"> <code><strong>lcdText </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kLCDRenderText_Flag">kLCDRenderText Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="50dedf8450159571a3edaf4f0050defe"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Font_Embedded_Bitmaps"></a> Font Embedded Bitmaps |
| |
| <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a> allows selecting custom sized bitmap <a href="undocumented#Glyph">Glyphs</a>. |
| <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> 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 <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> is set, and selects |
| the outline glyph if <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> is clear. |
| Windows may select the bitmap glyph but is not required to do so. |
| <a href="undocumented#OS_X">OS X</a> and iOS do not support this option. |
| |
| <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a> is disabled by default. |
| <a href="#Font_Embedded_Bitmaps">Font Embedded Bitmaps</a> can be enabled by default by setting <a href="undocumented#SkPaintDefaults_Flags">SkPaintDefaults Flags</a> to |
| <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> at compile time. |
| |
| ### Example |
| |
| <pre style="padding: 1em 1em 1em 1em; font-size: 13px width: 62.5em; background-color: #f0f0f0"> |
| <div>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.</div>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); |
| |
| </pre> |
| |
| <a name="SkPaint_isEmbeddedBitmapText"></a> |
| ## isEmbeddedBitmapText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isEmbeddedBitmapText() const |
| </pre> |
| |
| If true, <a href="undocumented#Engine">Font Engine</a> may return <a href="undocumented#Glyph">Glyphs</a> from font bitmaps instead of from outlines. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="eba10b27b790e87183ae451b3fc5c4b1"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isEmbeddedBitmapText() == !!(paint.getFlags() & SkPaint::kEmbeddedBitmapText_Flag) |
| paint.isEmbeddedBitmapText() == !!(paint.getFlags() & SkPaint::kEmbeddedBitmapText_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setEmbeddedBitmapText"></a> |
| ## setEmbeddedBitmapText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setEmbeddedBitmapText(bool useEmbeddedBitmapText) |
| </pre> |
| |
| Requests, but does not require, to use bitmaps in fonts instead of outlines. |
| |
| Sets <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> if <a href="#SkPaint_setEmbeddedBitmapText_useEmbeddedBitmapText">useEmbeddedBitmapText</a> is true. |
| Clears <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a> if <a href="#SkPaint_setEmbeddedBitmapText_useEmbeddedBitmapText">useEmbeddedBitmapText</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setEmbeddedBitmapText_useEmbeddedBitmapText"> <code><strong>useEmbeddedBitmapText </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kEmbeddedBitmapText_Flag">kEmbeddedBitmapText Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="246dffdd93a484ba4ad7ecf71198a5d4"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Automatic_Hinting"></a> Automatic Hinting |
| |
| If <a href="#SkPaint_Hinting">Hinting</a> is set to <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a> or <a href="#SkPaint_kFull_Hinting">kFull Hinting</a>, <a href="#Automatic_Hinting">Automatic Hinting</a> |
| instructs the <a href="undocumented#Font_Manager">Font Manager</a> to always hint <a href="undocumented#Glyph">Glyphs</a>. |
| <a href="#Automatic_Hinting">Automatic Hinting</a> has no effect if <a href="#SkPaint_Hinting">Hinting</a> is set to <a href="#SkPaint_kNo_Hinting">kNo Hinting</a> or |
| <a href="#SkPaint_kSlight_Hinting">kSlight Hinting</a>. |
| |
| <a href="#Automatic_Hinting">Automatic Hinting</a> only affects platforms that use FreeType as the <a href="undocumented#Font_Manager">Font Manager</a>. |
| |
| <a name="SkPaint_isAutohinted"></a> |
| ## isAutohinted |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isAutohinted() const |
| </pre> |
| |
| If true, and if <a href="#SkPaint_Hinting">Hinting</a> is set to <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a> or <a href="#SkPaint_kFull_Hinting">kFull Hinting</a>, and if |
| platform uses FreeType as the <a href="undocumented#Font_Manager">Font Manager</a>, instruct the <a href="undocumented#Font_Manager">Font Manager</a> to always hint |
| <a href="undocumented#Glyph">Glyphs</a>. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kAutoHinting_Flag">kAutoHinting Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kAutoHinting_Flag">kAutoHinting Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="aa4781afbe3b90e7ef56a287e5b9ce1e"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isAutohinted() == !!(paint.getFlags() & SkPaint::kAutoHinting_Flag) |
| paint.isAutohinted() == !!(paint.getFlags() & SkPaint::kAutoHinting_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_setAutohinted">setAutohinted</a> <a href="#SkPaint_Hinting">Hinting</a> |
| |
| --- |
| |
| <a name="SkPaint_setAutohinted"></a> |
| ## setAutohinted |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setAutohinted(bool useAutohinter) |
| </pre> |
| |
| If <a href="#SkPaint_Hinting">Hinting</a> is set to <a href="#SkPaint_kNormal_Hinting">kNormal Hinting</a> or <a href="#SkPaint_kFull_Hinting">kFull Hinting</a> and <a href="#SkPaint_setAutohinted_useAutohinter">useAutohinter</a> is set, |
| instruct the <a href="undocumented#Font_Manager">Font Manager</a> to always hint <a href="undocumented#Glyph">Glyphs</a>. |
| <a href="#Automatic_Hinting">Automatic Hinting</a> has no effect if <a href="#SkPaint_Hinting">Hinting</a> is set to <a href="#SkPaint_kNo_Hinting">kNo Hinting</a> or |
| <a href="#SkPaint_kSlight_Hinting">kSlight Hinting</a>. |
| |
| Only affects platforms that use FreeType as the <a href="undocumented#Font_Manager">Font Manager</a>. |
| |
| Sets <a href="#SkPaint_kAutoHinting_Flag">kAutoHinting Flag</a> if <a href="#SkPaint_setAutohinted_useAutohinter">useAutohinter</a> is true. |
| Clears <a href="#SkPaint_kAutoHinting_Flag">kAutoHinting Flag</a> if <a href="#SkPaint_setAutohinted_useAutohinter">useAutohinter</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setAutohinted_useAutohinter"> <code><strong>useAutohinter </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kAutoHinting_Flag">kAutoHinting Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="4e185306d7de9390fe8445eed0139309"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_isAutohinted">isAutohinted</a> <a href="#SkPaint_Hinting">Hinting</a> |
| |
| --- |
| |
| ## <a name="Vertical_Text"></a> Vertical Text |
| |
| <a href="undocumented#Text">Text</a> may be drawn by positioning each glyph, or by positioning the first glyph and |
| using <a href="undocumented#Advance">Font Advance</a> to position subsequent <a href="undocumented#Glyph">Glyphs</a>. By default, each successive glyph |
| is positioned to the right of the preceding glyph. <a href="#Vertical_Text">Vertical Text</a> sets successive |
| <a href="undocumented#Glyph">Glyphs</a> to position below the preceding glyph. |
| |
| Skia can translate text character codes as a series of <a href="undocumented#Glyph">Glyphs</a>, but does not implement |
| font substitution, |
| textual substitution, line layout, or contextual spacing like Kerning pairs. Use |
| a text shaping engine like <a href="http://harfbuzz.org/">HarfBuzz</a> to translate text runs |
| into glyph series. |
| |
| <a href="#Vertical_Text">Vertical Text</a> is clear if text is drawn left to right or set if drawn from top to bottom. |
| |
| <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> if clear draws text left to right. |
| <a href="#SkPaint_Flags">Flags</a> <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> if set draws text top to bottom. |
| |
| <a href="#Vertical_Text">Vertical Text</a> is clear by default. |
| <a href="#Vertical_Text">Vertical Text</a> can be set by default by setting <a href="undocumented#SkPaintDefaults_Flags">SkPaintDefaults Flags</a> to |
| <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> at compile time. |
| |
| ### Example |
| |
| <div><fiddle-embed name="8df5800819311b71373d9abb669b49b8"></fiddle-embed></div> |
| |
| <a name="SkPaint_isVerticalText"></a> |
| ## isVerticalText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isVerticalText() const |
| </pre> |
| |
| If true, <a href="undocumented#Glyph">Glyphs</a> are drawn top to bottom instead of left to right. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="4a269b16e644d473870ffa873396f139"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isVerticalText() == !!(paint.getFlags() & SkPaint::kVerticalText_Flag) |
| paint.isVerticalText() == !!(paint.getFlags() & SkPaint::kVerticalText_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setVerticalText"></a> |
| ## setVerticalText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setVerticalText(bool verticalText) |
| </pre> |
| |
| If true, text advance positions the next glyph below the previous glyph instead of to the |
| right of previous glyph. |
| |
| Sets <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> if vertical is true. |
| Clears <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> if vertical is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setVerticalText_verticalText"> <code><strong>verticalText </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="6fbd7e9e1a346cb8d7f537786009c736"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Fake_Bold"></a> Fake Bold |
| |
| <a href="#Fake_Bold">Fake Bold</a> 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 <a href="undocumented#Font_Manager">Font Manager</a>. |
| |
| Use <a href="#Text_Skew_X">Text Skew X</a> 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 <a href="undocumented#Glyph">Glyphs</a>. Otherwise, the extra bold is computed |
| by increasing the stroke width and setting the <a href="#SkPaint_Style">Style</a> to <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a> as needed. |
| |
| <a href="#Fake_Bold">Fake Bold</a> is disabled by default. |
| |
| ### Example |
| |
| <div><fiddle-embed name="e811f4829a2daaaeaad3795504a7e02a"></fiddle-embed></div> |
| |
| <a name="SkPaint_isFakeBoldText"></a> |
| ## isFakeBoldText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isFakeBoldText() const |
| </pre> |
| |
| If true, approximate bold by increasing the stroke width when creating glyph bitmaps |
| from outlines. |
| |
| Equivalent to <a href="#SkPaint_getFlags">getFlags</a> masked with <a href="#SkPaint_kFakeBoldText_Flag">kFakeBoldText Flag</a>. |
| |
| ### Return Value |
| |
| <a href="#SkPaint_kFakeBoldText_Flag">kFakeBoldText Flag</a> state |
| |
| ### Example |
| |
| <div><fiddle-embed name="f54d1f85b16073b80b9eef2e1a1d151d"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint.isFakeBoldText() == !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag) |
| paint.isFakeBoldText() == !!(paint.getFlags() & SkPaint::kFakeBoldText_Flag) |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setFakeBoldText"></a> |
| ## setFakeBoldText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setFakeBoldText(bool fakeBoldText) |
| </pre> |
| |
| Use increased stroke width when creating glyph bitmaps to approximate a bold typeface. |
| |
| Sets <a href="#SkPaint_kFakeBoldText_Flag">kFakeBoldText Flag</a> if <a href="#SkPaint_setFakeBoldText_fakeBoldText">fakeBoldText</a> is true. |
| Clears <a href="#SkPaint_kFakeBoldText_Flag">kFakeBoldText Flag</a> if <a href="#SkPaint_setFakeBoldText_fakeBoldText">fakeBoldText</a> is false. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setFakeBoldText_fakeBoldText"> <code><strong>fakeBoldText </strong></code> </a></td> <td> |
| setting for <a href="#SkPaint_kFakeBoldText_Flag">kFakeBoldText Flag</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="594d47858eb11028cb626515a520910a"> |
| |
| #### Example Output |
| |
| ~~~~ |
| paint1 == paint2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Full_Hinting_Spacing"></a> Full Hinting Spacing |
| |
| if <a href="#SkPaint_Hinting">Hinting</a> is set to <a href="#SkPaint_kFull_Hinting">kFull Hinting</a>, <a href="#Full_Hinting_Spacing">Full Hinting Spacing</a> adjusts the character |
| spacing by the difference of the hinted and Unhinted <a href="undocumented#Left_Side_Bearing">Left Side Bearing</a> and |
| <a href="undocumented#Right_Side_Bearing">Right Side Bearing</a>. <a href="#Full_Hinting_Spacing">Full Hinting Spacing</a> only applies to platforms that use |
| FreeType as their <a href="undocumented#Engine">Font Engine</a>. |
| |
| <a href="#Full_Hinting_Spacing">Full Hinting Spacing</a> is not related to text Kerning, where the space between |
| a specific pair of characters is adjusted using data in the font Kerning tables. |
| |
| <a name="SkPaint_isDevKernText"></a> |
| ## isDevKernText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isDevKernText() const |
| </pre> |
| |
| --- |
| |
| <a name="SkPaint_setDevKernText"></a> |
| ## setDevKernText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setDevKernText(bool) |
| </pre> |
| |
| --- |
| |
| ## <a name="Filter_Quality_Methods"></a> Filter Quality Methods |
| |
| <a href="undocumented#Filter_Quality">Filter Quality</a> trades speed for image filtering when the image is scaled. |
| A lower <a href="undocumented#Filter_Quality">Filter Quality</a> draws faster, but has less fidelity. |
| A higher <a href="undocumented#Filter_Quality">Filter Quality</a> draws slower, but looks better. |
| If the image is drawn without scaling, the <a href="undocumented#Filter_Quality">Filter Quality</a> choice will not result |
| in a noticeable difference. |
| |
| <a href="undocumented#Filter_Quality">Filter Quality</a> is used in <a href="#Paint">Paint</a> passed as a parameter to |
| |
| <table> <tr> |
| <td><a href="SkCanvas_Reference#SkCanvas_drawBitmap">SkCanvas::drawBitmap</a></td> </tr> <tr> |
| <td><a href="SkCanvas_Reference#SkCanvas_drawBitmapRect">SkCanvas::drawBitmapRect</a></td> </tr> <tr> |
| <td><a href="SkCanvas_Reference#SkCanvas_drawImage">SkCanvas::drawImage</a></td> </tr> <tr> |
| <td><a href="SkCanvas_Reference#SkCanvas_drawImageRect">SkCanvas::drawImageRect</a></td> </tr> |
| </table> |
| |
| and when <a href="#Paint">Paint</a> has a <a href="undocumented#Shader">Shader</a> specialization that uses <a href="SkImage_Reference#Image">Image</a> or <a href="SkBitmap_Reference#Bitmap">Bitmap</a>. |
| |
| <a href="undocumented#Filter_Quality">Filter Quality</a> is <a href="undocumented#kNone_SkFilterQuality">kNone_SkFilterQuality</a> by default. |
| |
| ### Example |
| |
| <div><fiddle-embed name="69369cff2f5b145a6f616092513266a0"></fiddle-embed></div> |
| |
| <a name="SkPaint_getFilterQuality"></a> |
| ## getFilterQuality |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkFilterQuality getFilterQuality() const |
| </pre> |
| |
| Returns <a href="undocumented#Filter_Quality">Filter Quality</a>, the image filtering level. A lower setting |
| draws faster; a higher setting looks better when the image is scaled. |
| |
| ### Return Value |
| |
| one of: <a href="undocumented#kNone_SkFilterQuality">kNone_SkFilterQuality</a>, <a href="undocumented#kLow_SkFilterQuality">kLow_SkFilterQuality</a>, |
| <a href="undocumented#kMedium_SkFilterQuality">kMedium_SkFilterQuality</a>, <a href="undocumented#kHigh_SkFilterQuality">kHigh_SkFilterQuality</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="d4ca1f23809b6835c4ba46ea98a86900"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kNone_SkFilterQuality == paint.getFilterQuality() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setFilterQuality"></a> |
| ## setFilterQuality |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setFilterQuality(SkFilterQuality quality) |
| </pre> |
| |
| Sets <a href="undocumented#Filter_Quality">Filter Quality</a>, 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 <a href="#SkPaint_setFilterQuality_quality">quality</a> is valid. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setFilterQuality_quality"> <code><strong>quality </strong></code> </a></td> <td> |
| one of: <a href="undocumented#kNone_SkFilterQuality">kNone_SkFilterQuality</a>, <a href="undocumented#kLow_SkFilterQuality">kLow_SkFilterQuality</a>, |
| <a href="undocumented#kMedium_SkFilterQuality">kMedium_SkFilterQuality</a>, <a href="undocumented#kHigh_SkFilterQuality">kHigh_SkFilterQuality</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="e4288fabf24ee60b645e8bb6ea0afadf"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kHigh_SkFilterQuality == paint.getFilterQuality() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="undocumented#SkFilterQuality">SkFilterQuality</a> <a href="undocumented#Image_Scaling">Image Scaling</a> |
| |
| --- |
| |
| ## <a name="Color_Methods"></a> Color Methods |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#SkPaint_getColor">getColor</a> | returns <a href="SkColor_Reference#Alpha">Color Alpha</a> and <a href="SkColor_Reference#RGB">Color RGB</a>, one drawing color | |
| | <a href="#SkPaint_setColor">setColor</a> | sets <a href="SkColor_Reference#Alpha">Color Alpha</a> and <a href="SkColor_Reference#RGB">Color RGB</a>, one drawing color | |
| |
| <a href="SkColor_Reference#Color">Color</a> specifies the <a href="SkColor_Reference#RGB_Red">Color RGB Red</a>, <a href="SkColor_Reference#RGB_Blue">Color RGB Blue</a>, <a href="SkColor_Reference#RGB_Green">Color RGB Green</a>, and <a href="SkColor_Reference#Alpha">Color Alpha</a> |
| 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. |
| |
| <a href="SkColor_Reference#Color">Color</a> is not <a href="undocumented#Premultiply">Premultiplied</a>; <a href="SkColor_Reference#Alpha">Color Alpha</a> sets the transparency independent of |
| <a href="SkColor_Reference#RGB">Color RGB</a>: <a href="SkColor_Reference#RGB_Red">Color RGB Red</a>, <a href="SkColor_Reference#RGB_Blue">Color RGB Blue</a>, and <a href="SkColor_Reference#RGB_Green">Color RGB Green</a>. |
| |
| The bit positions of <a href="SkColor_Reference#Alpha">Color Alpha</a> and <a href="SkColor_Reference#RGB">Color RGB</a> 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 | <a href="SkColor_Reference#Alpha">Color Alpha</a> | <a href="SkColor_Reference#RGB_Red">Color RGB Red</a> | <a href="SkColor_Reference#RGB_Blue">Color RGB Blue</a> | <a href="SkColor_Reference#RGB_Green">Color RGB Green</a> | |
| | --- | --- | --- | --- | --- | |
| | | 31 - 24 | 23 - 16 | 15 - 8 | 7 - 0 | |
| |
| ### Example |
| |
| <div><fiddle-embed name="214b559d75c65a7bef6ef4be1f860053"></fiddle-embed></div> |
| |
| <a name="SkPaint_getColor"></a> |
| ## getColor |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkColor getColor() const |
| </pre> |
| |
| Retrieves <a href="SkColor_Reference#Alpha">Alpha</a> and <a href="SkColor_Reference#RGB">Color RGB</a>, <a href="undocumented#Unpremultiply">Unpremultiplied</a>, packed into 32 bits. |
| Use helpers <a href="SkColor_Reference#SkColorGetA">SkColorGetA</a>, <a href="SkColor_Reference#SkColorGetR">SkColorGetR</a>, <a href="SkColor_Reference#SkColorGetG">SkColorGetG</a>, and <a href="SkColor_Reference#SkColorGetB">SkColorGetB</a> to extract |
| a color component. |
| |
| ### Return Value |
| |
| <a href="undocumented#Unpremultiply">Unpremultiplied</a> <a href="SkColor_Reference#ARGB">Color ARGB</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="72d41f890203109a41f589a7403acae9"> |
| |
| #### Example Output |
| |
| ~~~~ |
| Yellow is 100% red, 100% green, and 0% blue. |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="SkColor_Reference#SkColor">SkColor</a> |
| |
| --- |
| |
| <a name="SkPaint_setColor"></a> |
| ## setColor |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setColor(SkColor color) |
| </pre> |
| |
| Sets <a href="SkColor_Reference#Alpha">Alpha</a> and <a href="SkColor_Reference#RGB">Color RGB</a> used when stroking and filling. The <a href="#SkPaint_setColor_color">color</a> is a 32-bit value, |
| <a href="undocumented#Unpremultiply">Unpremultiplied</a>, packing 8-bit components for <a href="SkColor_Reference#Alpha">Alpha</a>, <a href="SkColor_Reference#RGB_Red">Red</a>, <a href="SkColor_Reference#RGB_Blue">Blue</a>, and <a href="SkColor_Reference#RGB_Green">Green</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setColor_color"> <code><strong>color </strong></code> </a></td> <td> |
| <a href="undocumented#Unpremultiply">Unpremultiplied</a> <a href="SkColor_Reference#ARGB">Color ARGB</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="6e70f18300bd676a3c056ceb6b62f8df"> |
| |
| #### Example Output |
| |
| ~~~~ |
| green1 == green2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="SkColor_Reference#SkColor">SkColor</a> <a href="#SkPaint_setARGB">setARGB</a> <a href="SkColor_Reference#SkColorSetARGB">SkColorSetARGB</a> |
| |
| --- |
| |
| ## <a name="Alpha_Methods"></a> Alpha Methods |
| |
| <a href="SkColor_Reference#Alpha">Color Alpha</a> sets the transparency independent of <a href="SkColor_Reference#RGB">Color RGB</a>: <a href="SkColor_Reference#RGB_Red">Color RGB Red</a>, <a href="SkColor_Reference#RGB_Blue">Color RGB Blue</a>, and <a href="SkColor_Reference#RGB_Green">Color RGB Green</a>. |
| |
| <a name="SkPaint_getAlpha"></a> |
| ## getAlpha |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| uint8_t getAlpha() const |
| </pre> |
| |
| Retrieves <a href="SkColor_Reference#Alpha">Alpha</a> from the <a href="SkColor_Reference#Color">Color</a> used when stroking and filling. |
| |
| ### Return Value |
| |
| <a href="SkColor_Reference#Alpha">Alpha</a> ranging from zero, fully transparent, to 255, fully opaque |
| |
| ### Example |
| |
| <div><fiddle-embed name="9a85bb62fe3d877b18fb7f952c4fa7f7"> |
| |
| #### Example Output |
| |
| ~~~~ |
| 255 == paint.getAlpha() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setAlpha"></a> |
| ## setAlpha |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setAlpha(U8CPU a) |
| </pre> |
| |
| Replaces <a href="SkColor_Reference#Alpha">Alpha</a>, leaving <a href="SkColor_Reference#RGB">Color RGB</a> |
| unchanged. An out of range value triggers an assert in the debug |
| build. <a href="#SkPaint_setAlpha_a">a</a> is <a href="#SkPaint_setAlpha_a">a</a> value from zero to 255. |
| <a href="#SkPaint_setAlpha_a">a</a> set to zero makes <a href="SkColor_Reference#Color">Color</a> fully transparent; <a href="#SkPaint_setAlpha_a">a</a> set to 255 makes <a href="SkColor_Reference#Color">Color</a> |
| fully opaque. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setAlpha_a"> <code><strong>a </strong></code> </a></td> <td> |
| <a href="SkColor_Reference#Alpha">Alpha</a> component of <a href="SkColor_Reference#Color">Color</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="6ddc0360512dfb9947e75c17e6a8103d"> |
| |
| #### Example Output |
| |
| ~~~~ |
| 0x44112233 == paint.getColor() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setARGB"></a> |
| ## setARGB |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) |
| </pre> |
| |
| Sets <a href="SkColor_Reference#Color">Color</a> used when drawing solid fills. The color components range from 0 to 255. |
| The color is <a href="undocumented#Unpremultiply">Unpremultiplied</a>; <a href="SkColor_Reference#Alpha">Alpha</a> sets the transparency independent of <a href="SkColor_Reference#RGB">Color RGB</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setARGB_a"> <code><strong>a </strong></code> </a></td> <td> |
| amount of <a href="SkColor_Reference#Alpha">Color Alpha</a>, from fully transparent (0) to fully opaque (255)</td> |
| </tr> <tr> <td><a name="SkPaint_setARGB_r"> <code><strong>r </strong></code> </a></td> <td> |
| amount of <a href="SkColor_Reference#RGB_Red">Color RGB Red</a>, from no red (0) to full red (255)</td> |
| </tr> <tr> <td><a name="SkPaint_setARGB_g"> <code><strong>g </strong></code> </a></td> <td> |
| amount of <a href="SkColor_Reference#RGB_Green">Color RGB Green</a>, from no green (0) to full green (255)</td> |
| </tr> <tr> <td><a name="SkPaint_setARGB_b"> <code><strong>b </strong></code> </a></td> <td> |
| amount of <a href="SkColor_Reference#RGB_Blue">Color RGB Blue</a>, from no blue (0) to full blue (255)</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="cb62e4755789ed32f7120dc55984959d"> |
| |
| #### Example Output |
| |
| ~~~~ |
| transRed1 == transRed2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_setColor">setColor</a> <a href="SkColor_Reference#SkColorSetARGB">SkColorSetARGB</a> |
| |
| --- |
| |
| ## <a name="Style"></a> Style |
| |
| <a href="#Style">Style</a> specifies if the geometry is filled, stroked, or both filled and stroked. |
| Some shapes ignore <a href="#Style">Style</a> and are always drawn filled or stroked. |
| |
| Set <a href="#Style">Style</a> to <a href="#SkPaint_kFill_Style">kFill Style</a> to fill the shape. |
| The fill covers the area inside the geometry for most shapes. |
| |
| Set <a href="#Style">Style</a> to <a href="#SkPaint_kStroke_Style">kStroke Style</a> to stroke the shape. |
| |
| ## <a name="Style_Fill"></a> Style Fill |
| |
| ### See Also |
| |
| <a href="SkPath_Reference#Fill_Type">Path Fill Type</a> |
| |
| ## <a name="Style_Stroke"></a> Style Stroke |
| |
| The stroke covers the area described by following the shape edge with a pen or brush of |
| <a href="#Stroke_Width">Stroke Width</a>. The area covered where the shape starts and stops is described by <a href="#Stroke_Cap">Stroke Cap</a>. |
| The area covered where the shape turns a corner is described by <a href="#Stroke_Join">Stroke Join</a>. |
| The stroke is centered on the shape; it extends equally on either side of the shape edge. |
| |
| As <a href="#Stroke_Width">Stroke Width</a> gets smaller, the drawn path frame is thinner. <a href="#Stroke_Width">Stroke Width</a> less than one |
| may have gaps, and if <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> is set, <a href="SkColor_Reference#Alpha">Color Alpha</a> will increase to visually decrease coverage. |
| |
| ## <a name="Style_Hairline"></a> Style Hairline |
| |
| <a href="#Stroke_Width">Stroke Width</a> of zero has a special meaning and switches drawing to use <a href="#Style_Hairline">Hairline</a>. |
| <a href="#Style_Hairline">Hairline</a> draws the thinnest continuous frame. If <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> is clear, adjacent pixels |
| flow horizontally, vertically,or diagonally. |
| |
| <a href="SkPath_Reference#Path">Path</a> drawing with <a href="#Style_Hairline">Hairline</a> may hit the same pixel more than once. For instance, <a href="SkPath_Reference#Path">Path</a> containing |
| two lines in one <a href="SkPath_Reference#Contour">Path Contour</a> will draw the corner point once, but may both lines may draw the adjacent |
| pixel. If <a href="#SkPaint_kAntiAlias_Flag">kAntiAlias Flag</a> 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. |
| |
| ## <a name="SkPaint_Style"></a> Enum SkPaint::Style |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#SkPaint_Style">Style</a> { |
| <a href="#SkPaint_kFill_Style">kFill Style</a>, |
| <a href="#SkPaint_kStroke_Style">kStroke Style</a>, |
| <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a>, |
| }; |
| |
| static constexpr int <a href="#SkPaint_kStyleCount">kStyleCount</a> = <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a> + 1; |
| </pre> |
| |
| Set <a href="#SkPaint_Style">Style</a> 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 <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a> to avoid hitting the same pixels twice with a stroke draw and |
| a fill draw. |
| |
| ### Constants |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kFill_Style"> <code><strong>SkPaint::kFill_Style </strong></code> </a></td><td>0</td><td>Set to fill geometry. |
| Applies to <a href="SkRect_Reference#Rect">Rect</a>, <a href="undocumented#Region">Region</a>, <a href="undocumented#Round_Rect">Round Rect</a>, <a href="undocumented#Circle">Circles</a>, <a href="undocumented#Oval">Ovals</a>, <a href="SkPath_Reference#Path">Path</a>, and <a href="undocumented#Text">Text</a>. |
| <a href="SkBitmap_Reference#Bitmap">Bitmap</a>, <a href="SkImage_Reference#Image">Image</a>, <a href="undocumented#Patch">Patches</a>, <a href="undocumented#Region">Region</a>, <a href="undocumented#Sprite">Sprites</a>, and <a href="undocumented#Vertices">Vertices</a> are painted as if |
| <a href="#SkPaint_kFill_Style">kFill Style</a> is set, and ignore the set <a href="#SkPaint_Style">Style</a>. |
| The <a href="SkPath_Reference#Fill_Type">Path Fill Type</a> specifies additional rules to fill the area outside the path edge, |
| and to create an unfilled hole inside the shape. |
| <a href="#SkPaint_Style">Style</a> is set to <a href="#SkPaint_kFill_Style">kFill Style</a> by default. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kStroke_Style"> <code><strong>SkPaint::kStroke_Style </strong></code> </a></td><td>1</td><td>Set to stroke geometry. |
| Applies to <a href="SkRect_Reference#Rect">Rect</a>, <a href="undocumented#Region">Region</a>, <a href="undocumented#Round_Rect">Round Rect</a>, <a href="undocumented#Arc">Arcs</a>, <a href="undocumented#Circle">Circles</a>, <a href="undocumented#Oval">Ovals</a>, <a href="SkPath_Reference#Path">Path</a>, and <a href="undocumented#Text">Text</a>. |
| <a href="undocumented#Arc">Arcs</a>, <a href="undocumented#Line">Lines</a>, and points, are always drawn as if <a href="#SkPaint_kStroke_Style">kStroke Style</a> is set, |
| and ignore the set <a href="#SkPaint_Style">Style</a>. |
| The stroke construction is unaffected by the <a href="SkPath_Reference#Fill_Type">Path Fill Type</a>. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kStrokeAndFill_Style"> <code><strong>SkPaint::kStrokeAndFill_Style </strong></code> </a></td><td>2</td><td>Set to stroke and fill geometry. |
| Applies to <a href="SkRect_Reference#Rect">Rect</a>, <a href="undocumented#Region">Region</a>, <a href="undocumented#Round_Rect">Round Rect</a>, <a href="undocumented#Circle">Circles</a>, <a href="undocumented#Oval">Ovals</a>, <a href="SkPath_Reference#Path">Path</a>, and <a href="undocumented#Text">Text</a>. |
| <a href="SkPath_Reference#Path">Path</a> is treated as if it is set to <a href="SkPath_Reference#SkPath_kWinding_FillType">SkPath::kWinding FillType</a>, |
| and the set <a href="SkPath_Reference#Fill_Type">Path Fill Type</a> is ignored. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kStyleCount"> <code><strong>SkPaint::kStyleCount </strong></code> </a></td><td>3</td><td>The number of different <a href="#SkPaint_Style">Style</a> values defined. |
| May be used to verify that <a href="#SkPaint_Style">Style</a> is a legal value. |
| </td> |
| </tr> |
| |
| |
| |
| <a name="SkPaint_getStyle"></a> |
| ## getStyle |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| Style getStyle() const |
| </pre> |
| |
| Whether the geometry is filled, stroked, or filled and stroked. |
| |
| ### Return Value |
| |
| one of:<a href="#SkPaint_kFill_Style">kFill Style</a>, <a href="#SkPaint_kStroke_Style">kStroke Style</a>, <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="1c5e18c3c0102d2dac86a78ba8c8ce01"> |
| |
| #### Example Output |
| |
| ~~~~ |
| SkPaint::kFill_Style == paint.getStyle() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_Style">Style</a> <a href="#SkPaint_setStyle">setStyle</a> |
| |
| --- |
| |
| <a name="SkPaint_setStyle"></a> |
| ## setStyle |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setStyle(Style style) |
| </pre> |
| |
| Sets whether the geometry is filled, stroked, or filled and stroked. |
| Has no effect if <a href="#SkPaint_setStyle_style">style</a> is not a legal <a href="#SkPaint_Style">Style</a> value. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setStyle_style"> <code><strong>style </strong></code> </a></td> <td> |
| one of: <a href="#SkPaint_kFill_Style">kFill Style</a>, <a href="#SkPaint_kStroke_Style">kStroke Style</a>, <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="c7bb6248e4735b8d1a32d02fba40d344"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_Style">Style</a> <a href="#SkPaint_getStyle">getStyle</a> |
| |
| --- |
| |
| ### See Also |
| |
| <a href="SkPath_Reference#Fill_Type">Path Fill Type</a> <a href="undocumented#Path_Effect">Path Effect</a> <a href="#Style_Fill">Style Fill</a> <a href="#Style_Stroke">Style Stroke</a> |
| |
| ## <a name="Stroke_Width"></a> Stroke Width |
| |
| <a href="#Stroke_Width">Stroke Width</a> 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 <a href="#SkPaint_kStroke_Style">kStroke Style</a> or <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a>. |
| |
| 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 <a href="#Style_Hairline">Hairline</a> stroke |
| remains one pixel wide regardless of scaling. |
| |
| The default width for the paint is zero. |
| |
| ### Example |
| |
| <div><fiddle-embed name="5112c7209a19e035c61cef33a624a652" gpu="true"><div>The pixels hit to represent thin lines vary with the angle of the |
| line and the platform implementation. |
| </div></fiddle-embed></div> |
| |
| <a name="SkPaint_getStrokeWidth"></a> |
| ## getStrokeWidth |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar getStrokeWidth() const |
| </pre> |
| |
| Returns the thickness of the pen used by <a href="#Paint">Paint</a> to |
| outline the shape. |
| |
| ### Return Value |
| |
| zero for <a href="#Style_Hairline">Hairline</a>, greater than zero for pen thickness |
| |
| ### Example |
| |
| <div><fiddle-embed name="99aa73f64df8bbf06e656cd891a81b9e"> |
| |
| #### Example Output |
| |
| ~~~~ |
| 0 == paint.getStrokeWidth() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setStrokeWidth"></a> |
| ## setStrokeWidth |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setStrokeWidth(SkScalar width) |
| </pre> |
| |
| Sets the thickness of the pen used by the paint to |
| outline the shape. |
| Has no effect if <a href="#SkPaint_setStrokeWidth_width">width</a> is less than zero. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setStrokeWidth_width"> <code><strong>width </strong></code> </a></td> <td> |
| zero thickness for <a href="#Style_Hairline">Hairline</a>; greater than zero for pen thickness</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="0c4446c0870b5c7b5a2efe77ff92afb8"> |
| |
| #### Example Output |
| |
| ~~~~ |
| 5 == paint.getStrokeWidth() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Miter_Limit"></a> Miter Limit |
| |
| <a href="#Miter_Limit">Miter Limit</a> specifies the maximum miter length, |
| relative to the stroke width. |
| |
| <a href="#Miter_Limit">Miter Limit</a> is used when the <a href="#Stroke_Join">Stroke Join</a> |
| is set to <a href="#SkPaint_kMiter_Join">kMiter Join</a>, and the <a href="#SkPaint_Style">Style</a> is either <a href="#SkPaint_kStroke_Style">kStroke Style</a> |
| or <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a>. |
| |
| If the miter at a corner exceeds this limit, <a href="#SkPaint_kMiter_Join">kMiter Join</a> |
| is replaced with <a href="#SkPaint_kBevel_Join">kBevel Join</a>. |
| |
| <a href="#Miter_Limit">Miter Limit</a> can be computed from the corner angle: |
| |
| miter limit = 1 / sin ( angle / 2 )<a href="#Miter_Limit">Miter Limit</a> default value is 4. |
| The default may be changed at compile time by setting <a href="undocumented#SkPaintDefaults_MiterLimit">SkPaintDefaults MiterLimit</a> |
| 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 |
| |
| <div><fiddle-embed name="5de2de0f00354e59074a9bb1a42d5a63"><div>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. |
| </div></fiddle-embed></div> |
| |
| <a name="SkPaint_getStrokeMiter"></a> |
| ## getStrokeMiter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar getStrokeMiter() const |
| </pre> |
| |
| The limit at which a sharp corner is drawn beveled. |
| |
| ### Return Value |
| |
| zero and greater <a href="#Miter_Limit">Miter Limit</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="50da74a43b725f07a914df588c867d36"> |
| |
| #### Example Output |
| |
| ~~~~ |
| default miter limit == 4 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#Miter_Limit">Miter Limit</a> <a href="#SkPaint_setStrokeMiter">setStrokeMiter</a> <a href="#SkPaint_Join">Join</a> |
| |
| --- |
| |
| <a name="SkPaint_setStrokeMiter"></a> |
| ## setStrokeMiter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setStrokeMiter(SkScalar miter) |
| </pre> |
| |
| The limit at which a sharp corner is drawn beveled. |
| Valid values are zero and greater. |
| Has no effect if <a href="#SkPaint_setStrokeMiter_miter">miter</a> is less than zero. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setStrokeMiter_miter"> <code><strong>miter </strong></code> </a></td> <td> |
| zero and greater <a href="#Miter_Limit">Miter Limit</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="700b284dbc97785c6a9c9636088713ad"> |
| |
| #### Example Output |
| |
| ~~~~ |
| default miter limit == 8 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#Miter_Limit">Miter Limit</a> <a href="#SkPaint_getStrokeMiter">getStrokeMiter</a> <a href="#SkPaint_Join">Join</a> |
| |
| --- |
| |
| ## <a name="Stroke_Cap"></a> Stroke Cap |
| |
| ## <a name="SkPaint_Cap"></a> Enum SkPaint::Cap |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#SkPaint_Cap">Cap</a> { |
| <a href="#SkPaint_kButt_Cap">kButt Cap</a>, |
| <a href="#SkPaint_kRound_Cap">kRound Cap</a>, |
| <a href="#SkPaint_kSquare_Cap">kSquare Cap</a>, |
| |
| <a href="#SkPaint_kLast_Cap">kLast Cap</a> = <a href="#SkPaint_kSquare_Cap">kSquare Cap</a>, |
| <a href="#SkPaint_kDefault_Cap">kDefault Cap</a> = <a href="#SkPaint_kButt_Cap">kButt Cap</a>, |
| }; |
| |
| static constexpr int <a href="#SkPaint_kCapCount">kCapCount</a> = <a href="#SkPaint_kLast_Cap">kLast Cap</a> + 1; |
| </pre> |
| |
| <a href="#Stroke_Cap">Stroke Cap</a> draws at the beginning and end of an open <a href="SkPath_Reference#Contour">Path Contour</a>. |
| |
| ### Constants |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kButt_Cap"> <code><strong>SkPaint::kButt_Cap </strong></code> </a></td><td>0</td><td>Does not extend the stroke past the beginning or the end. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kRound_Cap"> <code><strong>SkPaint::kRound_Cap </strong></code> </a></td><td>1</td><td>Adds a circle with a diameter equal to <a href="#Stroke_Width">Stroke Width</a> at the beginning |
| and end. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kSquare_Cap"> <code><strong>SkPaint::kSquare_Cap </strong></code> </a></td><td>2</td><td>Adds a square with sides equal to <a href="#Stroke_Width">Stroke Width</a> at the beginning |
| and end. The square sides are parallel to the initial and final direction |
| of the stroke. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kLast_Cap"> <code><strong>SkPaint::kLast_Cap </strong></code> </a></td><td>2</td><td>Equivalent to the largest value for <a href="#Stroke_Cap">Stroke Cap</a>. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kDefault_Cap"> <code><strong>SkPaint::kDefault_Cap </strong></code> </a></td><td>0</td><td>Equivalent to <a href="#SkPaint_kButt_Cap">kButt Cap</a>. |
| <a href="#Stroke_Cap">Stroke Cap</a> is set to <a href="#SkPaint_kButt_Cap">kButt Cap</a> by default. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kCapCount"> <code><strong>SkPaint::kCapCount </strong></code> </a></td><td>3</td><td>The number of different <a href="#Stroke_Cap">Stroke Cap</a> values defined. |
| May be used to verify that <a href="#Stroke_Cap">Stroke Cap</a> is a legal value. |
| </td> |
| </tr> |
| |
| Stroke describes the area covered by a pen of <a href="#Stroke_Width">Stroke Width</a> as it |
| follows the <a href="SkPath_Reference#Contour">Path Contour</a>, moving parallel to the contour direction. |
| |
| If the <a href="SkPath_Reference#Contour">Path Contour</a> is not terminated by <a href="SkPath_Reference#SkPath_kClose_Verb">SkPath::kClose Verb</a>, the contour has a |
| visible beginning and end. |
| |
| <a href="SkPath_Reference#Contour">Path Contour</a> may start and end at the same point; defining <a href="SkPath_Reference#Contour_Zero_Length">Zero Length Contour</a>. |
| |
| <a href="#SkPaint_kButt_Cap">kButt Cap</a> and <a href="SkPath_Reference#Contour_Zero_Length">Zero Length Contour</a> is not drawn. |
| <a href="#SkPaint_kRound_Cap">kRound Cap</a> and <a href="SkPath_Reference#Contour_Zero_Length">Zero Length Contour</a> draws a circle of diameter <a href="#Stroke_Width">Stroke Width</a> |
| at the contour point. |
| <a href="#SkPaint_kSquare_Cap">kSquare Cap</a> and <a href="SkPath_Reference#Contour_Zero_Length">Zero Length Contour</a> draws an upright square with a side of |
| <a href="#Stroke_Width">Stroke Width</a> at the contour point. |
| |
| <a href="#Stroke_Cap">Stroke Cap</a> is <a href="#SkPaint_kButt_Cap">kButt Cap</a> by default. |
| |
| ### Example |
| |
| <div><fiddle-embed name="2bffb6384cc20077e632e7d01da045ca"></fiddle-embed></div> |
| |
| <a name="SkPaint_getStrokeCap"></a> |
| ## getStrokeCap |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| Cap getStrokeCap() const |
| </pre> |
| |
| The geometry drawn at the beginning and end of strokes. |
| |
| ### Return Value |
| |
| one of: <a href="#SkPaint_kButt_Cap">kButt Cap</a>, <a href="#SkPaint_kRound_Cap">kRound Cap</a>, <a href="#SkPaint_kSquare_Cap">kSquare Cap</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="aabf9baee8e026fae36fca30e955512b"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kButt_Cap == default stroke cap |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#Stroke_Cap">Stroke Cap</a> <a href="#SkPaint_setStrokeCap">setStrokeCap</a> |
| |
| --- |
| |
| <a name="SkPaint_setStrokeCap"></a> |
| ## setStrokeCap |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setStrokeCap(Cap cap) |
| </pre> |
| |
| The geometry drawn at the beginning and end of strokes. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setStrokeCap_cap"> <code><strong>cap </strong></code> </a></td> <td> |
| one of: <a href="#SkPaint_kButt_Cap">kButt Cap</a>, <a href="#SkPaint_kRound_Cap">kRound Cap</a>, <a href="#SkPaint_kSquare_Cap">kSquare Cap</a>; |
| has no effect if <a href="#SkPaint_setStrokeCap_cap">cap</a> is not valid</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="de83fbd848a4625345b4b87a6e55d98a"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kRound_Cap == paint.getStrokeCap() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#Stroke_Cap">Stroke Cap</a> <a href="#SkPaint_getStrokeCap">getStrokeCap</a> |
| |
| --- |
| |
| ## <a name="Stroke_Join"></a> Stroke Join |
| |
| <a href="#Stroke_Join">Stroke Join</a> draws at the sharp corners of an open or closed <a href="SkPath_Reference#Contour">Path Contour</a>. |
| |
| Stroke describes the area covered by a pen of <a href="#Stroke_Width">Stroke Width</a> as it |
| follows the <a href="SkPath_Reference#Contour">Path Contour</a>, 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 <a href="#Stroke_Join">Stroke Join</a>. |
| |
| ### Example |
| |
| <div><fiddle-embed name="917c44b504d3f9308571fd3835d90a0d"></fiddle-embed></div> |
| |
| ## <a name="SkPaint_Join"></a> Enum SkPaint::Join |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#SkPaint_Join">Join</a> { |
| <a href="#SkPaint_kMiter_Join">kMiter Join</a>, |
| <a href="#SkPaint_kRound_Join">kRound Join</a>, |
| <a href="#SkPaint_kBevel_Join">kBevel Join</a>, |
| |
| <a href="#SkPaint_kLast_Join">kLast Join</a> = <a href="#SkPaint_kBevel_Join">kBevel Join</a>, |
| <a href="#SkPaint_kDefault_Join">kDefault Join</a> = <a href="#SkPaint_kMiter_Join">kMiter Join</a>, |
| }; |
| |
| static constexpr int <a href="#SkPaint_kJoinCount">kJoinCount</a> = <a href="#SkPaint_kLast_Join">kLast Join</a> + 1; |
| </pre> |
| |
| <a href="#SkPaint_Join">Join</a> specifies how corners are drawn when a shape is stroked. <a href="#SkPaint_Join">Join</a> |
| 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 |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kMiter_Join"> <code><strong>SkPaint::kMiter_Join </strong></code> </a></td><td>0</td><td>Extends the outside corner to the extent allowed by <a href="#Miter_Limit">Miter Limit</a>. |
| If the extension exceeds <a href="#Miter_Limit">Miter Limit</a>, <a href="#SkPaint_kBevel_Join">kBevel Join</a> is used instead. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kRound_Join"> <code><strong>SkPaint::kRound_Join </strong></code> </a></td><td>1</td><td>Adds a circle with a diameter of <a href="#Stroke_Width">Stroke Width</a> at the sharp corner. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kBevel_Join"> <code><strong>SkPaint::kBevel_Join </strong></code> </a></td><td>2</td><td>Connects the outside edges of the sharp corner. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kLast_Join"> <code><strong>SkPaint::kLast_Join </strong></code> </a></td><td>2</td><td>Equivalent to the largest value for <a href="#Stroke_Join">Stroke Join</a>. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kDefault_Join"> <code><strong>SkPaint::kDefault_Join </strong></code> </a></td><td>1</td><td>Equivalent to <a href="#SkPaint_kMiter_Join">kMiter Join</a>. |
| <a href="#Stroke_Join">Stroke Join</a> is set to <a href="#SkPaint_kMiter_Join">kMiter Join</a> by default. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kJoinCount"> <code><strong>SkPaint::kJoinCount </strong></code> </a></td><td>3</td><td>The number of different <a href="#Stroke_Join">Stroke Join</a> values defined. |
| May be used to verify that <a href="#Stroke_Join">Stroke Join</a> is a legal value. |
| </td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="3b1aebacc21c1836a52876b9b0b3905e"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_setStrokeJoin">setStrokeJoin</a> <a href="#SkPaint_getStrokeJoin">getStrokeJoin</a> <a href="#SkPaint_setStrokeMiter">setStrokeMiter</a> <a href="#SkPaint_getStrokeMiter">getStrokeMiter</a> |
| |
| |
| |
| <a name="SkPaint_getStrokeJoin"></a> |
| ## getStrokeJoin |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| Join getStrokeJoin() const |
| </pre> |
| |
| The geometry drawn at the corners of strokes. |
| |
| ### Return Value |
| |
| one of: <a href="#SkPaint_kMiter_Join">kMiter Join</a>, <a href="#SkPaint_kRound_Join">kRound Join</a>, <a href="#SkPaint_kBevel_Join">kBevel Join</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="31bf751d0a8ddf176b871810820d8199"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kMiter_Join == default stroke join |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#Stroke_Join">Stroke Join</a> <a href="#SkPaint_setStrokeJoin">setStrokeJoin</a> |
| |
| --- |
| |
| <a name="SkPaint_setStrokeJoin"></a> |
| ## setStrokeJoin |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setStrokeJoin(Join join) |
| </pre> |
| |
| The geometry drawn at the corners of strokes. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setStrokeJoin_join"> <code><strong>join </strong></code> </a></td> <td> |
| one of: <a href="#SkPaint_kMiter_Join">kMiter Join</a>, <a href="#SkPaint_kRound_Join">kRound Join</a>, <a href="#SkPaint_kBevel_Join">kBevel Join</a>; |
| otherwise, has no effect</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="48d963ad4286eddf680f9c511eb6da91"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kMiter_Join == paint.getStrokeJoin() |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#Stroke_Join">Stroke Join</a> <a href="#SkPaint_getStrokeJoin">getStrokeJoin</a> |
| |
| --- |
| |
| ### See Also |
| |
| <a href="#Miter_Limit">Miter Limit</a> |
| |
| ## <a name="Fill_Path"></a> Fill Path |
| |
| <a href="#Fill_Path">Fill Path</a> creates a <a href="SkPath_Reference#Path">Path</a> by applying the <a href="undocumented#Path_Effect">Path Effect</a>, followed by the <a href="#Style_Stroke">Style Stroke</a>. |
| |
| If <a href="#Paint">Paint</a> contains <a href="undocumented#Path_Effect">Path Effect</a>, <a href="undocumented#Path_Effect">Path Effect</a> operates on the source <a href="SkPath_Reference#Path">Path</a>; the result |
| replaces the destination <a href="SkPath_Reference#Path">Path</a>. Otherwise, the source <a href="SkPath_Reference#Path">Path</a> is replaces the |
| destination <a href="SkPath_Reference#Path">Path</a>. |
| |
| Fill <a href="SkPath_Reference#Path">Path</a> can request the <a href="undocumented#Path_Effect">Path Effect</a> to restrict to a culling rectangle, but |
| the <a href="undocumented#Path_Effect">Path Effect</a> is not required to do so. |
| |
| If <a href="#SkPaint_Style">Style</a> is <a href="#SkPaint_kStroke_Style">kStroke Style</a> or <a href="#SkPaint_kStrokeAndFill_Style">kStrokeAndFill Style</a>, |
| and <a href="#Stroke_Width">Stroke Width</a> is greater than zero, the <a href="#Stroke_Width">Stroke Width</a>, <a href="#Stroke_Cap">Stroke Cap</a>, <a href="#Stroke_Join">Stroke Join</a>, |
| and <a href="#Miter_Limit">Miter Limit</a> operate on the destination <a href="SkPath_Reference#Path">Path</a>, replacing it. |
| |
| Fill <a href="SkPath_Reference#Path">Path</a> can specify the precision used by <a href="#Stroke_Width">Stroke Width</a> to approximate the stroke geometry. |
| |
| If the <a href="#SkPaint_Style">Style</a> is <a href="#SkPaint_kStroke_Style">kStroke Style</a> and the <a href="#Stroke_Width">Stroke Width</a> is zero, <a href="#SkPaint_getFillPath">getFillPath</a> |
| returns false since <a href="#Style_Hairline">Hairline</a> has no filled equivalent. |
| |
| <a name="SkPaint_getFillPath"></a> |
| ## getFillPath |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool getFillPath(const SkPath& src, SkPath* dst, const SkRect* cullRect, SkScalar resScale = 1) const |
| </pre> |
| |
| The filled equivalent of the stroked path. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getFillPath_src"> <code><strong>src </strong></code> </a></td> <td> |
| <a href="SkPath_Reference#Path">Path</a> read to create a filled version</td> |
| </tr> <tr> <td><a name="SkPaint_getFillPath_dst"> <code><strong>dst </strong></code> </a></td> <td> |
| resulting <a href="SkPath_Reference#Path">Path</a>; may be the same as <a href="#SkPaint_getFillPath_src">src</a>, but may not be nullptr</td> |
| </tr> <tr> <td><a name="SkPaint_getFillPath_cullRect"> <code><strong>cullRect </strong></code> </a></td> <td> |
| optional limit passed to <a href="undocumented#Path_Effect">Path Effect</a></td> |
| </tr> <tr> <td><a name="SkPaint_getFillPath_resScale"> <code><strong>resScale </strong></code> </a></td> <td> |
| if > 1, increase precision, else if (0 < res < 1) reduce precision |
| to favor speed and size</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if the path represents <a href="#Style_Fill">Style Fill</a>, or false if it represents <a href="#Style_Hairline">Hairline</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="cedd6233848198e1fca4d1e14816baaf"><div>A very small <a href="SkPath_Reference#Quad">Quad</a> stroke is turned into a filled path with increasing levels of precision. |
| At the lowest precision, the <a href="SkPath_Reference#Quad">Quad</a> stroke is approximated by a rectangle. |
| At the highest precision, the filled path has high fidelity compared to the original stroke. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getFillPath_2"></a> |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool getFillPath(const SkPath& src, SkPath* dst) const |
| </pre> |
| |
| The filled equivalent of the stroked path. |
| |
| Replaces <a href="#SkPaint_getFillPath_2_dst">dst</a> with the <a href="#SkPaint_getFillPath_2_src">src</a> path modified by <a href="undocumented#Path_Effect">Path Effect</a> and <a href="#Style_Stroke">Style Stroke</a>. |
| <a href="undocumented#Path_Effect">Path Effect</a>, if any, is not culled. <a href="#Stroke_Width">Stroke Width</a> is created with default precision. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getFillPath_2_src"> <code><strong>src </strong></code> </a></td> <td> |
| <a href="SkPath_Reference#Path">Path</a> read to create a filled version</td> |
| </tr> <tr> <td><a name="SkPaint_getFillPath_2_dst"> <code><strong>dst </strong></code> </a></td> <td> |
| resulting <a href="SkPath_Reference#Path">Path</a> <a href="#SkPaint_getFillPath_2_dst">dst</a> may be the same as <a href="#SkPaint_getFillPath_2_src">src</a>, but may not be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if the path represents <a href="#Style_Fill">Style Fill</a>, or false if it represents <a href="#Style_Hairline">Hairline</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="e6d8ca0cc17e0b475bd54dd995825468"></fiddle-embed></div> |
| |
| --- |
| |
| ### See Also |
| |
| <a href="#Style_Stroke">Style Stroke</a> <a href="#Stroke_Width">Stroke Width</a> <a href="undocumented#Path_Effect">Path Effect</a> |
| |
| ## <a name="Shader_Methods"></a> Shader Methods |
| |
| <a href="undocumented#Shader">Shader</a> defines the colors used when drawing a shape. |
| <a href="undocumented#Shader">Shader</a> may be an image, a gradient, or a computed fill. |
| If <a href="#Paint">Paint</a> has no <a href="undocumented#Shader">Shader</a>, then <a href="SkColor_Reference#Color">Color</a> fills the shape. |
| |
| <a href="undocumented#Shader">Shader</a> is modulated by <a href="SkColor_Reference#Alpha">Color Alpha</a> component of <a href="SkColor_Reference#Color">Color</a>. |
| If <a href="undocumented#Shader">Shader</a> object defines only <a href="SkColor_Reference#Alpha">Color Alpha</a>, then <a href="SkColor_Reference#Color">Color</a> modulated by <a href="SkColor_Reference#Alpha">Color Alpha</a> describes |
| the fill. |
| |
| The drawn transparency can be modified without altering <a href="undocumented#Shader">Shader</a>, by changing <a href="SkColor_Reference#Alpha">Color Alpha</a>. |
| |
| ### Example |
| |
| <div><fiddle-embed name="c015dc2010c15e1c00b4f7330232b0f7"></fiddle-embed></div> |
| |
| If <a href="undocumented#Shader">Shader</a> generates only <a href="SkColor_Reference#Alpha">Color Alpha</a> then all components of <a href="SkColor_Reference#Color">Color</a> modulate the output. |
| |
| ### Example |
| |
| <div><fiddle-embed name="fe80fd80b98a20823db7fb9a077243c7"></fiddle-embed></div> |
| |
| <a name="SkPaint_getShader"></a> |
| ## getShader |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkShader* getShader() const |
| </pre> |
| |
| Optional colors used when filling a path, such as a gradient. |
| |
| Does not alter <a href="undocumented#Shader">Shader</a> <a href="undocumented#Reference_Count">Reference Count</a>. |
| |
| ### Return Value |
| |
| <a href="undocumented#Shader">Shader</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="09f15b9fd88882850da2d235eb86292f"> |
| |
| #### Example Output |
| |
| ~~~~ |
| nullptr == shader |
| nullptr != shader |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_refShader"></a> |
| ## refShader |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| sk_sp<SkShader> refShader() const |
| </pre> |
| |
| Optional colors used when filling a path, such as a gradient. |
| |
| Increases <a href="undocumented#Shader">Shader</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Shader">Shader</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="53da0295972a418cbc9607bbb17feaa8"> |
| |
| #### Example Output |
| |
| ~~~~ |
| shader unique: true |
| shader unique: false |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setShader"></a> |
| ## setShader |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setShader(sk_sp<SkShader> shader) |
| </pre> |
| |
| Optional colors used when filling a path, such as a gradient. |
| |
| Sets <a href="undocumented#Shader">Shader</a> to <a href="#SkPaint_setShader_shader">shader</a>, decreasing <a href="undocumented#Reference_Count">Reference Count</a> of the previous <a href="undocumented#Shader">Shader</a>. |
| Increments <a href="#SkPaint_setShader_shader">shader</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setShader_shader"> <code><strong>shader </strong></code> </a></td> <td> |
| how geometry is filled with color; if nullptr, <a href="SkColor_Reference#Color">Color</a> is used instead</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="77e64d5bae9b1ba037fd99252bb4aa58"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Color_Filter_Methods"></a> Color Filter Methods |
| |
| <a href="undocumented#Color_Filter">Color Filter</a> alters the color used when drawing a shape. |
| <a href="undocumented#Color_Filter">Color Filter</a> may apply <a href="undocumented#Blend_Mode">Blend Mode</a>, transform the color through a matrix, or composite multiple filters. |
| If <a href="#Paint">Paint</a> has no <a href="undocumented#Color_Filter">Color Filter</a>, the color is unaltered. |
| |
| The drawn transparency can be modified without altering <a href="undocumented#Color_Filter">Color Filter</a>, by changing <a href="SkColor_Reference#Alpha">Color Alpha</a>. |
| |
| ### Example |
| |
| <div><fiddle-embed name="5abde56ca2f89a18b8e231abd1b57c56"></fiddle-embed></div> |
| |
| <a name="SkPaint_getColorFilter"></a> |
| ## getColorFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkColorFilter* getColorFilter() const |
| </pre> |
| |
| Returns <a href="undocumented#Color_Filter">Color Filter</a> if set, or nullptr. |
| Does not alter <a href="undocumented#Color_Filter">Color Filter</a> <a href="undocumented#Reference_Count">Reference Count</a>. |
| |
| ### Return Value |
| |
| <a href="undocumented#Color_Filter">Color Filter</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="093bdc627d6b59002670fd290931f6c9"> |
| |
| #### Example Output |
| |
| ~~~~ |
| nullptr == color filter |
| nullptr != color filter |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_refColorFilter"></a> |
| ## refColorFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| sk_sp<SkColorFilter> refColorFilter() const |
| </pre> |
| |
| Returns <a href="undocumented#Color_Filter">Color Filter</a> if set, or nullptr. |
| Increases <a href="undocumented#Color_Filter">Color Filter</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Color_Filter">Color Filter</a> if set, or nullptr |
| |
| ### Example |
| |
| <div><fiddle-embed name="b588c95fa4c86ddbc4b0546762f08297"> |
| |
| #### Example Output |
| |
| ~~~~ |
| color filter unique: true |
| color filter unique: false |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setColorFilter"></a> |
| ## setColorFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setColorFilter(sk_sp<SkColorFilter> colorFilter) |
| </pre> |
| |
| Sets <a href="undocumented#Color_Filter">Color Filter</a> to filter, decreasing <a href="undocumented#Reference_Count">Reference Count</a> of the previous |
| <a href="undocumented#Color_Filter">Color Filter</a>. Pass nullptr to clear <a href="undocumented#Color_Filter">Color Filter</a>. |
| |
| Increments filter <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setColorFilter_colorFilter"> <code><strong>colorFilter </strong></code> </a></td> <td> |
| <a href="undocumented#Color_Filter">Color Filter</a> to apply to subsequent draw</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="c7b786dc9b3501cd0eaba47494b6fa31"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Blend_Mode_Methods"></a> Blend Mode Methods |
| |
| <a href="undocumented#Blend_Mode">Blend Mode</a> describes how <a href="SkColor_Reference#Color">Color</a> combines with the destination color. |
| The default setting, <a href="undocumented#SkBlendMode_kSrcOver">SkBlendMode::kSrcOver</a>, draws the source color |
| over the destination color. |
| |
| ### Example |
| |
| <div><fiddle-embed name="73092d4d06faecea3c204d852a4dd8a8"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="undocumented#Blend_Mode">Blend Mode</a> |
| |
| <a name="SkPaint_getBlendMode"></a> |
| ## getBlendMode |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkBlendMode getBlendMode() const |
| </pre> |
| |
| Returns <a href="undocumented#Blend_Mode">Blend Mode</a>. |
| By default, returns <a href="undocumented#SkBlendMode_kSrcOver">SkBlendMode::kSrcOver</a>. |
| |
| ### Return Value |
| |
| mode used to combine source color with destination color |
| |
| ### Example |
| |
| <div><fiddle-embed name="a1e059c8f6740fa2044cc64152b39dda"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kSrcOver == getBlendMode |
| kSrcOver != getBlendMode |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_isSrcOver"></a> |
| ## isSrcOver |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool isSrcOver() const |
| </pre> |
| |
| Returns true if <a href="undocumented#Blend_Mode">Blend Mode</a> is <a href="undocumented#SkBlendMode_kSrcOver">SkBlendMode::kSrcOver</a>, the default. |
| |
| ### Return Value |
| |
| true if <a href="undocumented#Blend_Mode">Blend Mode</a> is <a href="undocumented#SkBlendMode_kSrcOver">SkBlendMode::kSrcOver</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="257c9473db7a2b3a0fb2b9e2431e59a6"> |
| |
| #### Example Output |
| |
| ~~~~ |
| isSrcOver == true |
| isSrcOver != true |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setBlendMode"></a> |
| ## setBlendMode |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setBlendMode(SkBlendMode mode) |
| </pre> |
| |
| Sets <a href="undocumented#Blend_Mode">Blend Mode</a> to <a href="#SkPaint_setBlendMode_mode">mode</a>. |
| Does not check for valid input. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setBlendMode_mode"> <code><strong>mode </strong></code> </a></td> <td> |
| <a href="undocumented#SkBlendMode">SkBlendMode</a> used to combine source color and destination</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="257c9473db7a2b3a0fb2b9e2431e59a6"> |
| |
| #### Example Output |
| |
| ~~~~ |
| isSrcOver == true |
| isSrcOver != true |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Path_Effect_Methods"></a> Path Effect Methods |
| |
| <a href="undocumented#Path_Effect">Path Effect</a> modifies the path geometry before drawing it. |
| <a href="undocumented#Path_Effect">Path Effect</a> may implement dashing, custom fill effects and custom stroke effects. |
| If <a href="#Paint">Paint</a> has no <a href="undocumented#Path_Effect">Path Effect</a>, the path geometry is unaltered when filled or stroked. |
| |
| ### Example |
| |
| <div><fiddle-embed name="8cf5684b187d60f09e11c4a48993ea39"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="undocumented#Path_Effect">Path Effect</a> |
| |
| <a name="SkPaint_getPathEffect"></a> |
| ## getPathEffect |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkPathEffect* getPathEffect() const |
| </pre> |
| |
| Returns <a href="undocumented#Path_Effect">Path Effect</a> if set, or nullptr. |
| Does not alter <a href="undocumented#Path_Effect">Path Effect</a> <a href="undocumented#Reference_Count">Reference Count</a>. |
| |
| ### Return Value |
| |
| <a href="undocumented#Path_Effect">Path Effect</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="211a1b14bfa6c4332082c8eab4fbc5fd"> |
| |
| #### Example Output |
| |
| ~~~~ |
| nullptr == path effect |
| nullptr != path effect |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_refPathEffect"></a> |
| ## refPathEffect |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| sk_sp<SkPathEffect> refPathEffect() const |
| </pre> |
| |
| Returns <a href="undocumented#Path_Effect">Path Effect</a> if set, or nullptr. |
| Increases <a href="undocumented#Path_Effect">Path Effect</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Path_Effect">Path Effect</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="f56039b94c702c2704c8c5100e623aca"> |
| |
| #### Example Output |
| |
| ~~~~ |
| path effect unique: true |
| path effect unique: false |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setPathEffect"></a> |
| ## setPathEffect |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setPathEffect(sk_sp<SkPathEffect> pathEffect) |
| </pre> |
| |
| Sets <a href="undocumented#Path_Effect">Path Effect</a> to <a href="#SkPaint_setPathEffect_pathEffect">pathEffect</a>, decreasing <a href="undocumented#Reference_Count">Reference Count</a> of the previous |
| <a href="undocumented#Path_Effect">Path Effect</a>. Pass nullptr to leave the path geometry unaltered. |
| |
| Increments <a href="#SkPaint_setPathEffect_pathEffect">pathEffect</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setPathEffect_pathEffect"> <code><strong>pathEffect </strong></code> </a></td> <td> |
| replace <a href="SkPath_Reference#Path">Path</a> with a modification when drawn</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="52dd55074ca0b7d520d04e750ca2a0d7"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Mask_Filter_Methods"></a> Mask Filter Methods |
| |
| <a href="undocumented#Mask_Filter">Mask Filter</a> uses coverage of the shape drawn to create <a href="undocumented#Mask_Alpha">Mask Alpha</a>. |
| <a href="undocumented#Mask_Filter">Mask Filter</a> takes a Mask, and returns a Mask. |
| |
| <a href="undocumented#Mask_Filter">Mask Filter</a> may change the geometry and transparency of the shape, such as |
| creating a blur effect. Set <a href="undocumented#Mask_Filter">Mask Filter</a> to nullptr to prevent <a href="undocumented#Mask_Filter">Mask Filter</a> from |
| modifying the draw. |
| |
| ### Example |
| |
| <div><fiddle-embed name="55d7b9d482ac8e17a6153f555a8adb8d"></fiddle-embed></div> |
| |
| <a name="SkPaint_getMaskFilter"></a> |
| ## getMaskFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkMaskFilter* getMaskFilter() const |
| </pre> |
| |
| Returns <a href="undocumented#Mask_Filter">Mask Filter</a> if set, or nullptr. |
| Does not alter <a href="undocumented#Mask_Filter">Mask Filter</a> <a href="undocumented#Reference_Count">Reference Count</a>. |
| |
| ### Return Value |
| |
| <a href="undocumented#Mask_Filter">Mask Filter</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="5ac4b31371726da87bb7390b385e9fee"> |
| |
| #### Example Output |
| |
| ~~~~ |
| nullptr == mask filter |
| nullptr != mask filter |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_refMaskFilter"></a> |
| ## refMaskFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| sk_sp<SkMaskFilter> refMaskFilter() const |
| </pre> |
| |
| Returns <a href="undocumented#Mask_Filter">Mask Filter</a> if set, or nullptr. |
| |
| Increases <a href="undocumented#Mask_Filter">Mask Filter</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Mask_Filter">Mask Filter</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="084b0dc3cebd78718c651d58f257f799"> |
| |
| #### Example Output |
| |
| ~~~~ |
| mask filter unique: true |
| mask filter unique: false |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setMaskFilter"></a> |
| ## setMaskFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setMaskFilter(sk_sp<SkMaskFilter> maskFilter) |
| </pre> |
| |
| Sets <a href="undocumented#Mask_Filter">Mask Filter</a> to <a href="#SkPaint_setMaskFilter_maskFilter">maskFilter</a>, decreasing <a href="undocumented#Reference_Count">Reference Count</a> of the previous |
| <a href="undocumented#Mask_Filter">Mask Filter</a>. Pass nullptr to clear <a href="undocumented#Mask_Filter">Mask Filter</a> and leave <a href="undocumented#Mask_Filter">Mask Filter</a> effect on |
| <a href="undocumented#Mask_Alpha">Mask Alpha</a> unaltered. |
| |
| Increments <a href="#SkPaint_setMaskFilter_maskFilter">maskFilter</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setMaskFilter_maskFilter"> <code><strong>maskFilter </strong></code> </a></td> <td> |
| modifies clipping mask generated from drawn geometry</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="a993831c40f3e134f809134e3b74e4a6"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Typeface_Methods"></a> Typeface Methods |
| |
| <a href="undocumented#Typeface">Typeface</a> identifies the font used when drawing and measuring text. |
| <a href="undocumented#Typeface">Typeface</a> may be specified by name, from a file, or from a data stream. |
| The default <a href="undocumented#Typeface">Typeface</a> defers to the platform-specific default font |
| implementation. |
| |
| ### Example |
| |
| <div><fiddle-embed name="1a7a5062725139760962582f599f1b97"></fiddle-embed></div> |
| |
| <a name="SkPaint_getTypeface"></a> |
| ## getTypeface |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkTypeface* getTypeface() const |
| </pre> |
| |
| Returns <a href="undocumented#Typeface">Typeface</a> if set, or nullptr. |
| Increments <a href="undocumented#Typeface">Typeface</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Typeface">Typeface</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="5ce718e5a184baaac80e7098d7dad67b"> |
| |
| #### Example Output |
| |
| ~~~~ |
| nullptr == typeface |
| nullptr != typeface |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_refTypeface"></a> |
| ## refTypeface |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| sk_sp<SkTypeface> refTypeface() const |
| </pre> |
| |
| Increases <a href="undocumented#Typeface">Typeface</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Typeface">Typeface</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="8b5aa7e555a0dc31be69db7cadf471a1"> |
| |
| #### Example Output |
| |
| ~~~~ |
| typeface1 != typeface2 |
| typeface1 == typeface2 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setTypeface"></a> |
| ## setTypeface |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setTypeface(sk_sp<SkTypeface> typeface) |
| </pre> |
| |
| Sets <a href="undocumented#Typeface">Typeface</a> to <a href="#SkPaint_setTypeface_typeface">typeface</a>, decreasing <a href="undocumented#Reference_Count">Reference Count</a> of the previous <a href="undocumented#Typeface">Typeface</a>. |
| Pass nullptr to clear <a href="undocumented#Typeface">Typeface</a> and use the default <a href="#SkPaint_setTypeface_typeface">typeface</a>. Increments |
| <a href="#SkPaint_setTypeface_typeface">typeface</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setTypeface_typeface"> <code><strong>typeface </strong></code> </a></td> <td> |
| font and style used to draw text</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="0e6fbb7773cd925b274552f4cd1abef2"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Image_Filter_Methods"></a> Image Filter Methods |
| |
| <a href="undocumented#Image_Filter">Image Filter</a> operates on the pixel representation of the shape, as modified by <a href="#Paint">Paint</a> |
| with <a href="undocumented#Blend_Mode">Blend Mode</a> set to <a href="undocumented#SkBlendMode_kSrcOver">SkBlendMode::kSrcOver</a>. <a href="undocumented#Image_Filter">Image Filter</a> creates a new bitmap, |
| which is drawn to the device using the set <a href="undocumented#Blend_Mode">Blend Mode</a>. |
| |
| <a href="undocumented#Image_Filter">Image Filter</a> is higher level than <a href="undocumented#Mask_Filter">Mask Filter</a>; for instance, an <a href="undocumented#Image_Filter">Image Filter</a> |
| can operate on all channels of <a href="SkColor_Reference#Color">Color</a>, while <a href="undocumented#Mask_Filter">Mask Filter</a> generates <a href="SkColor_Reference#Alpha">Alpha</a> only. |
| <a href="undocumented#Image_Filter">Image Filter</a> operates independently of and can be used in combination with |
| <a href="undocumented#Mask_Filter">Mask Filter</a>. |
| |
| ### Example |
| |
| <div><fiddle-embed name="250e45c5935d54eac6aca775d1fe3475"></fiddle-embed></div> |
| |
| <a name="SkPaint_getImageFilter"></a> |
| ## getImageFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkImageFilter* getImageFilter() const |
| </pre> |
| |
| Returns <a href="undocumented#Image_Filter">Image Filter</a> if set, or nullptr. |
| Does not alter <a href="undocumented#Image_Filter">Image Filter</a> <a href="undocumented#Reference_Count">Reference Count</a>. |
| |
| ### Return Value |
| |
| <a href="undocumented#Image_Filter">Image Filter</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="7b8118ff57fcb84e6bc82380d155b62e"> |
| |
| #### Example Output |
| |
| ~~~~ |
| nullptr == image filter |
| nullptr != image filter |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_refImageFilter"></a> |
| ## refImageFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| sk_sp<SkImageFilter> refImageFilter() const |
| </pre> |
| |
| Returns <a href="undocumented#Image_Filter">Image Filter</a> if set, or nullptr. |
| Increases <a href="undocumented#Image_Filter">Image Filter</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Image_Filter">Image Filter</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="13f09088b569251547107d14ae989dc1"> |
| |
| #### Example Output |
| |
| ~~~~ |
| image filter unique: true |
| image filter unique: false |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setImageFilter"></a> |
| ## setImageFilter |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setImageFilter(sk_sp<SkImageFilter> imageFilter) |
| </pre> |
| |
| Sets <a href="undocumented#Image_Filter">Image Filter</a> to <a href="#SkPaint_setImageFilter_imageFilter">imageFilter</a>, decreasing <a href="undocumented#Reference_Count">Reference Count</a> of the previous |
| <a href="undocumented#Image_Filter">Image Filter</a>. Pass nullptr to clear <a href="undocumented#Image_Filter">Image Filter</a>, and remove <a href="undocumented#Image_Filter">Image Filter</a> effect |
| on drawing. |
| |
| Increments <a href="#SkPaint_setImageFilter_imageFilter">imageFilter</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setImageFilter_imageFilter"> <code><strong>imageFilter </strong></code> </a></td> <td> |
| how <a href="SkImage_Reference#Image">Image</a> is sampled when transformed</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="6679d6e4ec632715ee03e68391bd7f9a"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Draw_Looper_Methods"></a> Draw Looper Methods |
| |
| <a href="undocumented#Draw_Looper">Draw Looper</a> sets a modifier that communicates state from one <a href="undocumented#Draw_Layer">Draw Layer</a> |
| to another to construct the draw. |
| |
| <a href="undocumented#Draw_Looper">Draw Looper</a> draws one or more times, modifying the canvas and paint each time. |
| <a href="undocumented#Draw_Looper">Draw Looper</a> may be used to draw multiple colors or create a colored shadow. |
| Set <a href="undocumented#Draw_Looper">Draw Looper</a> to nullptr to prevent <a href="undocumented#Draw_Looper">Draw Looper</a> from modifying the draw. |
| |
| ### Example |
| |
| <div><fiddle-embed name="84ec12a36e50df5ac565cc7a75ffbe9f"></fiddle-embed></div> |
| |
| <a name="SkPaint_getDrawLooper"></a> |
| ## getDrawLooper |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkDrawLooper* getDrawLooper() const |
| </pre> |
| |
| Returns <a href="undocumented#Draw_Looper">Draw Looper</a> if set, or nullptr. |
| Does not alter <a href="undocumented#Draw_Looper">Draw Looper</a> <a href="undocumented#Reference_Count">Reference Count</a>. |
| |
| ### Return Value |
| |
| <a href="undocumented#Draw_Looper">Draw Looper</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="af4c5acc7a91e7f23c2af48018903ad4"> |
| |
| #### Example Output |
| |
| ~~~~ |
| nullptr == draw looper |
| nullptr != draw looper |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_refDrawLooper"></a> |
| ## refDrawLooper |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| sk_sp<SkDrawLooper> refDrawLooper() const |
| </pre> |
| |
| Returns <a href="undocumented#Draw_Looper">Draw Looper</a> if set, or nullptr. |
| Increases <a href="undocumented#Draw_Looper">Draw Looper</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Return Value |
| |
| <a href="undocumented#Draw_Looper">Draw Looper</a> if previously set, nullptr otherwise |
| |
| ### Example |
| |
| <div><fiddle-embed name="2a3782c33f04ed17a725d0e449c6f7c3"> |
| |
| #### Example Output |
| |
| ~~~~ |
| draw looper unique: true |
| draw looper unique: false |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getLooper"></a> |
| ## getLooper |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkDrawLooper* getLooper() const |
| </pre> |
| |
| --- |
| |
| <a name="SkPaint_setDrawLooper"></a> |
| ## setDrawLooper |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setDrawLooper(sk_sp<SkDrawLooper> drawLooper) |
| </pre> |
| |
| Sets <a href="undocumented#Draw_Looper">Draw Looper</a> to <a href="#SkPaint_setDrawLooper_drawLooper">drawLooper</a>, decreasing <a href="undocumented#Reference_Count">Reference Count</a> of the previous |
| <a href="#SkPaint_setDrawLooper_drawLooper">drawLooper</a>. Pass nullptr to clear <a href="undocumented#Draw_Looper">Draw Looper</a> and leave <a href="undocumented#Draw_Looper">Draw Looper</a> effect on |
| drawing unaltered. |
| |
| Increments <a href="#SkPaint_setDrawLooper_drawLooper">drawLooper</a> <a href="undocumented#Reference_Count">Reference Count</a> by one. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setDrawLooper_drawLooper"> <code><strong>drawLooper </strong></code> </a></td> <td> |
| iterates through drawing one or more time, altering <a href="#Paint">Paint</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="bf10f838b330f0a3a3266d42ea68a638"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setLooper"></a> |
| ## setLooper |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setLooper(sk_sp<SkDrawLooper> drawLooper) |
| </pre> |
| |
| --- |
| |
| ## <a name="Text_Align"></a> Text Align |
| |
| ## <a name="SkPaint_Align"></a> Enum SkPaint::Align |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#SkPaint_Align">Align</a> { |
| <a href="#SkPaint_kLeft_Align">kLeft Align</a>, |
| <a href="#SkPaint_kCenter_Align">kCenter Align</a>, |
| <a href="#SkPaint_kRight_Align">kRight Align</a>, |
| }; |
| |
| static constexpr int <a href="#SkPaint_kAlignCount">kAlignCount</a> = 3; |
| </pre> |
| |
| <a href="#SkPaint_Align">Align</a> adjusts the text relative to the text position. |
| <a href="#SkPaint_Align">Align</a> affects <a href="undocumented#Glyph">Glyphs</a> drawn with: <a href="SkCanvas_Reference#SkCanvas_drawText">SkCanvas::drawText</a>, <a href="SkCanvas_Reference#SkCanvas_drawPosText">SkCanvas::drawPosText</a>, |
| <a href="SkCanvas_Reference#SkCanvas_drawPosTextH">SkCanvas::drawPosTextH</a>, <a href="SkCanvas_Reference#SkCanvas_drawTextOnPath">SkCanvas::drawTextOnPath</a>, |
| <a href="SkCanvas_Reference#SkCanvas_drawTextOnPathHV">SkCanvas::drawTextOnPathHV</a>, <a href="SkCanvas_Reference#SkCanvas_drawTextRSXform">SkCanvas::drawTextRSXform</a>, <a href="SkCanvas_Reference#SkCanvas_drawTextBlob">SkCanvas::drawTextBlob</a>, |
| and <a href="SkCanvas_Reference#SkCanvas_drawString">SkCanvas::drawString</a>; |
| as well as calls that place text <a href="undocumented#Glyph">Glyphs</a> like <a href="#SkPaint_getTextWidths">getTextWidths</a> and <a href="#SkPaint_getTextPath">getTextPath</a>. |
| |
| 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. |
| |
| <a href="#SkPaint_Align">Align</a> adjusts the glyph position to center it or move it to abut the position |
| using the metrics returned by the font. |
| |
| <a href="#SkPaint_Align">Align</a> defaults to <a href="#SkPaint_kLeft_Align">kLeft Align</a>. |
| |
| ### Constants |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kLeft_Align"> <code><strong>SkPaint::kLeft_Align </strong></code> </a></td><td>0</td><td>Leaves the glyph at the position computed by the font offset by the text position. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kCenter_Align"> <code><strong>SkPaint::kCenter_Align </strong></code> </a></td><td>1</td><td>Moves the glyph half its width if <a href="#SkPaint_Flags">Flags</a> has <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> clear, and |
| half its height if <a href="#SkPaint_Flags">Flags</a> has <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> set. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kRight_Align"> <code><strong>SkPaint::kRight_Align </strong></code> </a></td><td>2</td><td>Moves the glyph by its width if <a href="#SkPaint_Flags">Flags</a> has <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> clear, |
| and by its height if <a href="#SkPaint_Flags">Flags</a> has <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> set. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kAlignCount"> <code><strong>SkPaint::kAlignCount </strong></code> </a></td><td>3</td><td>The number of different <a href="#Text_Align">Text Align</a> values defined. |
| </td> |
| </tr> |
| |
| |
| |
| ### Example |
| |
| <div><fiddle-embed name="702617fd9ebc3f12e30081b5db93e8a8"><div>Each position separately moves the glyph in drawPosText. |
| </div></fiddle-embed></div> |
| |
| ### Example |
| |
| <div><fiddle-embed name="f1cbbbafe6b3c52b81309cccbf96a308"><div><a href="#Vertical_Text">Vertical Text</a> treats <a href="#SkPaint_kLeft_Align">kLeft Align</a> as top align, and <a href="#SkPaint_kRight_Align">kRight Align</a> as bottom align. |
| </div></fiddle-embed></div> |
| |
| <a name="SkPaint_getTextAlign"></a> |
| ## getTextAlign |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| Align getTextAlign() const |
| </pre> |
| |
| Returns <a href="#Text_Align">Text Align</a>. |
| Returns <a href="#SkPaint_kLeft_Align">kLeft Align</a> if <a href="#Text_Align">Text Align</a> has not been set. |
| |
| ### Return Value |
| |
| text placement relative to position |
| |
| ### Example |
| |
| <div><fiddle-embed name="2df932f526e810f74c89d30ec3f4c947"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kLeft_Align == default |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setTextAlign"></a> |
| ## setTextAlign |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setTextAlign(Align align) |
| </pre> |
| |
| Sets <a href="#Text_Align">Text Align</a> to <a href="#SkPaint_setTextAlign_align">align</a>. |
| Has no effect if <a href="#SkPaint_setTextAlign_align">align</a> is an invalid value. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setTextAlign_align"> <code><strong>align </strong></code> </a></td> <td> |
| text placement relative to position</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="d37540afd918506ac2594665ca63979b"><div><a href="undocumented#Text">Text</a> is left-aligned by default, and then set to center. Setting the |
| alignment out of range has no effect. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Text_Size"></a> Text Size |
| |
| <a href="#Text_Size">Text Size</a> adjusts the overall text size in points. |
| <a href="#Text_Size">Text Size</a> can be set to any positive value or zero. |
| <a href="#Text_Size">Text Size</a> defaults to 12. |
| Set <a href="undocumented#SkPaintDefaults_TextSize">SkPaintDefaults TextSize</a> at compile time to change the default setting. |
| |
| ### Example |
| |
| <div><fiddle-embed name="91c9a3e498bb9412e4522a95d076ed5f"></fiddle-embed></div> |
| |
| <a name="SkPaint_getTextSize"></a> |
| ## getTextSize |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar getTextSize() const |
| </pre> |
| |
| Returns <a href="#Text_Size">Text Size</a> in points. |
| |
| ### Return Value |
| |
| typographic height of text |
| |
| ### Example |
| |
| <div><fiddle-embed name="983e2a71ba72d4ba8c945420040b8f1c"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setTextSize"></a> |
| ## setTextSize |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setTextSize(SkScalar textSize) |
| </pre> |
| |
| Sets <a href="#Text_Size">Text Size</a> in points. |
| Has no effect if <a href="#SkPaint_setTextSize_textSize">textSize</a> is not greater than or equal to zero. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setTextSize_textSize"> <code><strong>textSize </strong></code> </a></td> <td> |
| typographic height of text</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="6510c9e2f57b83c47e67829e7a68d493"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Text_Scale_X"></a> Text Scale X |
| |
| <a href="#Text_Scale_X">Text Scale X</a> adjusts the text horizontal scale. |
| <a href="undocumented#Text">Text</a> scaling approximates condensed and expanded type faces when the actual face |
| is not available. |
| <a href="#Text_Scale_X">Text Scale X</a> can be set to any value. |
| <a href="#Text_Scale_X">Text Scale X</a> defaults to 1. |
| |
| ### Example |
| |
| <div><fiddle-embed name="d13d787c1e36f515319fc998411c1d91"></fiddle-embed></div> |
| |
| <a name="SkPaint_getTextScaleX"></a> |
| ## getTextScaleX |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar getTextScaleX() const |
| </pre> |
| |
| Returns <a href="#Text_Scale_X">Text Scale X</a>. |
| Default value is 1. |
| |
| ### Return Value |
| |
| text horizontal scale |
| |
| ### Example |
| |
| <div><fiddle-embed name="5dc8e58f6910cb8e4de9ed60f888188b"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setTextScaleX"></a> |
| ## setTextScaleX |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setTextScaleX(SkScalar scaleX) |
| </pre> |
| |
| Sets <a href="#Text_Scale_X">Text Scale X</a>. |
| Default value is 1. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setTextScaleX_scaleX"> <code><strong>scaleX </strong></code> </a></td> <td> |
| text horizontal scale</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="a75bbdb8bb866b125c4c1dd5e967d470"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Text_Skew_X"></a> Text Skew X |
| |
| <a href="#Text_Skew_X">Text Skew X</a> adjusts the text horizontal slant. |
| <a href="undocumented#Text">Text</a> skewing approximates italic and oblique type faces when the actual face |
| is not available. |
| <a href="#Text_Skew_X">Text Skew X</a> can be set to any value. |
| <a href="#Text_Skew_X">Text Skew X</a> defaults to 0. |
| |
| ### Example |
| |
| <div><fiddle-embed name="aff208b0aab265f273045b27e683c17c"></fiddle-embed></div> |
| |
| <a name="SkPaint_getTextSkewX"></a> |
| ## getTextSkewX |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar getTextSkewX() const |
| </pre> |
| |
| Returns <a href="#Text_Skew_X">Text Skew X</a>. |
| Default value is zero. |
| |
| ### Return Value |
| |
| additional shear in x-axis relative to y-axis |
| |
| ### Example |
| |
| <div><fiddle-embed name="11c10f466dae0d1639dbb9f6a0040218"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setTextSkewX"></a> |
| ## setTextSkewX |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setTextSkewX(SkScalar skewX) |
| </pre> |
| |
| Sets <a href="#Text_Skew_X">Text Skew X</a>. |
| Default value is zero. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setTextSkewX_skewX"> <code><strong>skewX </strong></code> </a></td> <td> |
| additional shear in x-axis relative to y-axis</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="6bd705a6e0c5f8ee24f302fe531bfabc"></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Text_Encoding"></a> Text Encoding |
| |
| ## <a name="SkPaint_TextEncoding"></a> Enum SkPaint::TextEncoding |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#SkPaint_TextEncoding">TextEncoding</a> { |
| <a href="#SkPaint_kUTF8_TextEncoding">kUTF8 TextEncoding</a>, |
| <a href="#SkPaint_kUTF16_TextEncoding">kUTF16 TextEncoding</a>, |
| <a href="#SkPaint_kUTF32_TextEncoding">kUTF32 TextEncoding</a>, |
| <a href="#SkPaint_kGlyphID_TextEncoding">kGlyphID TextEncoding</a>, |
| }; |
| </pre> |
| |
| <a href="#SkPaint_TextEncoding">TextEncoding</a> determines whether text specifies character codes and their encoded |
| size, or glyph indices. Characters are encoded as specified by the <a href="http://unicode.org/standard/standard.html">Unicode standard</a> . |
| |
| 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. |
| |
| <a href="https://tools.ietf.org/html/rfc3629">UTF-8 (RFC 3629)</a> encodes each character as one or more 8-bit bytes. |
| |
| <a href="https://tools.ietf.org/html/rfc2781">UTF-16 (RFC 2781)</a> encodes each character as one or two 16-bit words. |
| |
| <a href="http://www.unicode.org/versions/Unicode5.0.0/ch03.pdf">UTF-32</a> encodes each character as one 32-bit word. |
| |
| <a href="undocumented#Font_Manager">Font Manager</a> uses font data to convert character code points into glyph indices. |
| A glyph index is a 16-bit word. |
| |
| <a href="#SkPaint_TextEncoding">TextEncoding</a> is set to <a href="#SkPaint_kUTF8_TextEncoding">kUTF8 TextEncoding</a> by default. |
| |
| ### Constants |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_kUTF8_TextEncoding"> <code><strong>SkPaint::kUTF8_TextEncoding </strong></code> </a></td><td>0</td><td>Uses bytes to represent UTF-8 or ASCII. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kUTF16_TextEncoding"> <code><strong>SkPaint::kUTF16_TextEncoding </strong></code> </a></td><td>1</td><td>Uses two byte words to represent most of Unicode. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kUTF32_TextEncoding"> <code><strong>SkPaint::kUTF32_TextEncoding </strong></code> </a></td><td>2</td><td>Uses four byte words to represent all of Unicode. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_kGlyphID_TextEncoding"> <code><strong>SkPaint::kGlyphID_TextEncoding </strong></code> </a></td><td>3</td><td>Uses two byte words to represent glyph indices. |
| </td> |
| </tr> |
| |
| |
| |
| ### Example |
| |
| <div><fiddle-embed name="b29294e7f29d160a1b46abf2dcec9d2a"><div>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. |
| </div></fiddle-embed></div> |
| |
| <a name="SkPaint_getTextEncoding"></a> |
| ## getTextEncoding |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| TextEncoding getTextEncoding() const |
| </pre> |
| |
| Returns <a href="#Text_Encoding">Text Encoding</a>. |
| <a href="#Text_Encoding">Text Encoding</a> determines how character code points are mapped to font glyph indices. |
| |
| ### Return Value |
| |
| one of: <a href="#SkPaint_kUTF8_TextEncoding">kUTF8 TextEncoding</a>, <a href="#SkPaint_kUTF16_TextEncoding">kUTF16 TextEncoding</a>, <a href="#SkPaint_kUTF32_TextEncoding">kUTF32 TextEncoding</a>, or |
| <a href="#SkPaint_kGlyphID_TextEncoding">kGlyphID TextEncoding</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="c6cc2780a9828b3af8c4621c12b29a1b"> |
| |
| #### Example Output |
| |
| ~~~~ |
| kUTF8_TextEncoding == text encoding |
| kGlyphID_TextEncoding == text encoding |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_setTextEncoding"></a> |
| ## setTextEncoding |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void setTextEncoding(TextEncoding encoding) |
| </pre> |
| |
| Sets <a href="#Text_Encoding">Text Encoding</a> to <a href="#SkPaint_setTextEncoding_encoding">encoding</a>. |
| <a href="#Text_Encoding">Text Encoding</a> determines how character code points are mapped to font glyph indices. |
| Invalid values for <a href="#SkPaint_setTextEncoding_encoding">encoding</a> are ignored. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_setTextEncoding_encoding"> <code><strong>encoding </strong></code> </a></td> <td> |
| one of: <a href="#SkPaint_kUTF8_TextEncoding">kUTF8 TextEncoding</a>, <a href="#SkPaint_kUTF16_TextEncoding">kUTF16 TextEncoding</a>, <a href="#SkPaint_kUTF32_TextEncoding">kUTF32 TextEncoding</a>, or |
| <a href="#SkPaint_kGlyphID_TextEncoding">kGlyphID TextEncoding</a></td> |
| </tr> |
| # |
| |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="329b92fbc35151dee9aa0c0e70107665"> |
| |
| #### Example Output |
| |
| ~~~~ |
| 4 != text encoding |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Font_Metrics"></a> Font Metrics |
| |
| <a href="#Font_Metrics">Font Metrics</a> describe dimensions common to the <a href="undocumented#Glyph">Glyphs</a> in <a href="undocumented#Typeface">Typeface</a>. |
| The dimensions are computed by <a href="undocumented#Font_Manager">Font Manager</a> from font data and do not take |
| <a href="#Paint">Paint</a> settings other than <a href="#Text_Size">Text Size</a> into account. |
| |
| <a href="undocumented#Font">Font</a> 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 |
| |
| <div><fiddle-embed name="2bfa3783719fcd769af177a1b244e171"></fiddle-embed></div> |
| |
| # <a name="SkPaint_FontMetrics"></a> Struct SkPaint::FontMetrics |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| struct <a href="#SkPaint_FontMetrics">FontMetrics</a> { |
| enum <a href="#SkPaint_FontMetrics_FontMetricsFlags">FontMetricsFlags</a> { |
| <a href="#SkPaint_FontMetrics_kUnderlineThicknessIsValid_Flag">kUnderlineThicknessIsValid Flag</a> = 1 << 0, |
| <a href="#SkPaint_FontMetrics_kUnderlinePositionIsValid_Flag">kUnderlinePositionIsValid Flag</a> = 1 << 1, |
| <a href="#SkPaint_FontMetrics_kStrikeoutThicknessIsValid_Flag">kStrikeoutThicknessIsValid Flag</a> = 1 << 2, |
| <a href="#SkPaint_FontMetrics_kStrikeoutPositionIsValid_Flag">kStrikeoutPositionIsValid Flag</a> = 1 << 3, |
| }; |
| |
| uint32_t <a href="#SkPaint_FontMetrics_fFlags">fFlags</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fTop">fTop</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fAscent">fAscent</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fDescent">fDescent</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fBottom">fBottom</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fLeading">fLeading</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fAvgCharWidth">fAvgCharWidth</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fMaxCharWidth">fMaxCharWidth</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fXMin">fXMin</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fXMax">fXMax</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fXHeight">fXHeight</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fCapHeight">fCapHeight</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fUnderlineThickness">fUnderlineThickness</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fUnderlinePosition">fUnderlinePosition</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fStrikeoutThickness">fStrikeoutThickness</a>; |
| <a href="undocumented#SkScalar">SkScalar</a> <a href="#SkPaint_FontMetrics_fStrikeoutPosition">fStrikeoutPosition</a>; |
| |
| bool <a href="#SkPaint_FontMetrics_hasUnderlineThickness">hasUnderlineThickness(SkScalar* thickness)</a> const; |
| bool <a href="#SkPaint_FontMetrics_hasUnderlinePosition">hasUnderlinePosition(SkScalar* position)</a> const; |
| bool <a href="#SkPaint_FontMetrics_hasStrikeoutThickness">hasStrikeoutThickness(SkScalar* thickness)</a> const; |
| bool <a href="#SkPaint_FontMetrics_hasStrikeoutPosition">hasStrikeoutPosition(SkScalar* position)</a> const; |
| }; |
| </pre> |
| |
| <a href="#SkPaint_FontMetrics">FontMetrics</a> is filled out by <a href="#SkPaint_getFontMetrics">getFontMetrics</a>. <a href="#SkPaint_FontMetrics">FontMetrics</a> contents reflect the values |
| computed by <a href="undocumented#Font_Manager">Font Manager</a> using <a href="undocumented#Typeface">Typeface</a>. 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. |
| |
| <a href="#SkPaint_FontMetrics_fUnderlineThickness">fUnderlineThickness</a> and <a href="#SkPaint_FontMetrics_fUnderlinePosition">fUnderlinePosition</a> have a bit set in <a href="#SkPaint_FontMetrics_fFlags">fFlags</a> if their values |
| are valid, since their value may be zero. |
| |
| <a href="#SkPaint_FontMetrics_fStrikeoutThickness">fStrikeoutThickness</a> and <a href="#SkPaint_FontMetrics_fStrikeoutPosition">fStrikeoutPosition</a> have a bit set in <a href="#SkPaint_FontMetrics_fFlags">fFlags</a> if their values |
| are valid, since their value may be zero. |
| |
| ## <a name="SkPaint_FontMetrics_FontMetricsFlags"></a> Enum SkPaint::FontMetrics::FontMetricsFlags |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| enum <a href="#SkPaint_FontMetrics_FontMetricsFlags">FontMetricsFlags</a> { |
| <a href="#SkPaint_FontMetrics_kUnderlineThicknessIsValid_Flag">kUnderlineThicknessIsValid Flag</a> = 1 << 0, |
| <a href="#SkPaint_FontMetrics_kUnderlinePositionIsValid_Flag">kUnderlinePositionIsValid Flag</a> = 1 << 1, |
| <a href="#SkPaint_FontMetrics_kStrikeoutThicknessIsValid_Flag">kStrikeoutThicknessIsValid Flag</a> = 1 << 2, |
| <a href="#SkPaint_FontMetrics_kStrikeoutPositionIsValid_Flag">kStrikeoutPositionIsValid Flag</a> = 1 << 3, |
| }; |
| </pre> |
| |
| <a href="#SkPaint_FontMetrics_FontMetricsFlags">FontMetricsFlags</a> are set in <a href="#SkPaint_FontMetrics_fFlags">fFlags</a> 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 |
| |
| <table> |
| <tr> |
| <td><a name="SkPaint_FontMetrics_kUnderlineThicknessIsValid_Flag"> <code><strong>SkPaint::FontMetrics::kUnderlineThicknessIsValid_Flag </strong></code> </a></td><td>0x0001</td><td>Set if <a href="#SkPaint_FontMetrics_fUnderlineThickness">fUnderlineThickness</a> is valid. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_FontMetrics_kUnderlinePositionIsValid_Flag"> <code><strong>SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag </strong></code> </a></td><td>0x0002</td><td>Set if <a href="#SkPaint_FontMetrics_fUnderlinePosition">fUnderlinePosition</a> is valid. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_FontMetrics_kStrikeoutThicknessIsValid_Flag"> <code><strong>SkPaint::FontMetrics::kStrikeoutThicknessIsValid_Flag </strong></code> </a></td><td>0x0004</td><td>Set if <a href="#SkPaint_FontMetrics_fStrikeoutThickness">fStrikeoutThickness</a> is valid. |
| </td> |
| </tr> |
| <tr> |
| <td><a name="SkPaint_FontMetrics_kStrikeoutPositionIsValid_Flag"> <code><strong>SkPaint::FontMetrics::kStrikeoutPositionIsValid_Flag </strong></code> </a></td><td>0x0008</td><td>Set if <a href="#SkPaint_FontMetrics_fStrikeoutPosition">fStrikeoutPosition</a> is valid. |
| </td> |
| </tr> |
| |
| |
| |
| <a name="SkPaint_FontMetrics_fFlags"> <code><strong>uint32_t fFlags</strong></code> </a> |
| |
| <a href="#SkPaint_FontMetrics_fFlags">fFlags</a> is set when underline metrics are valid. |
| |
| <a name="SkPaint_FontMetrics_fTop"> <code><strong>SkScalar fTop</strong></code> </a> |
| |
| Greatest extent above the baseline for any glyph. |
| Typically less than zero. |
| |
| <a name="SkPaint_FontMetrics_fAscent"> <code><strong>SkScalar fAscent</strong></code> </a> |
| |
| Recommended distance above the baseline to reserve for a line of text. |
| Typically less than zero. |
| |
| <a name="SkPaint_FontMetrics_fDescent"> <code><strong>SkScalar fDescent</strong></code> </a> |
| |
| Recommended distance below the baseline to reserve for a line of text. |
| Typically greater than zero. |
| |
| <a name="SkPaint_FontMetrics_fBottom"> <code><strong>SkScalar fBottom</strong></code> </a> |
| |
| Greatest extent below the baseline for any glyph. |
| Typically greater than zero. |
| |
| <a name="SkPaint_FontMetrics_fLeading"> <code><strong>SkScalar fLeading</strong></code> </a> |
| |
| Recommended distance to add between lines of text. |
| Typically greater than or equal to zero. |
| |
| <a name="SkPaint_FontMetrics_fAvgCharWidth"> <code><strong>SkScalar fAvgCharWidth</strong></code> </a> |
| |
| Average character width, if it is available. |
| Zero if no average width is stored in the font. |
| |
| <a name="SkPaint_FontMetrics_fMaxCharWidth"> <code><strong>SkScalar fMaxCharWidth</strong></code> </a> |
| |
| Maximum character width. |
| |
| <a name="SkPaint_FontMetrics_fXMin"> <code><strong>SkScalar fXMin</strong></code> </a> |
| |
| Minimum bounding box x value for all <a href="undocumented#Glyph">Glyphs</a>. |
| Typically less than zero. |
| |
| <a name="SkPaint_FontMetrics_fXMax"> <code><strong>SkScalar fXMax</strong></code> </a> |
| |
| Maximum bounding box x value for all <a href="undocumented#Glyph">Glyphs</a>. |
| Typically greater than zero. |
| |
| <a name="SkPaint_FontMetrics_fXHeight"> <code><strong>SkScalar fXHeight</strong></code> </a> |
| |
| Height of a lower-case 'x'. |
| May be zero if no lower-case height is stored in the font. |
| |
| <a name="SkPaint_FontMetrics_fCapHeight"> <code><strong>SkScalar fCapHeight</strong></code> </a> |
| |
| Height of an upper-case letter. |
| May be zero if no upper-case height is stored in the font. |
| |
| <a name="SkPaint_FontMetrics_fUnderlineThickness"> <code><strong>SkScalar fUnderlineThickness</strong></code> </a> |
| |
| Underline thickness. |
| |
| If the metric is valid, the <a href="#SkPaint_FontMetrics_kUnderlineThicknessIsValid_Flag">kUnderlineThicknessIsValid Flag</a> is set in <a href="#SkPaint_FontMetrics_fFlags">fFlags</a>. |
| If <a href="#SkPaint_FontMetrics_kUnderlineThicknessIsValid_Flag">kUnderlineThicknessIsValid Flag</a> is clear, <a href="#SkPaint_FontMetrics_fUnderlineThickness">fUnderlineThickness</a> is zero. |
| |
| <a name="SkPaint_FontMetrics_fUnderlinePosition"> <code><strong>SkScalar fUnderlinePosition</strong></code> </a> |
| |
| Position of the top of the underline stroke relative to the baseline. |
| Typically positive when valid. |
| |
| If the metric is valid, the <a href="#SkPaint_FontMetrics_kUnderlinePositionIsValid_Flag">kUnderlinePositionIsValid Flag</a> is set in <a href="#SkPaint_FontMetrics_fFlags">fFlags</a>. |
| If <a href="#SkPaint_FontMetrics_kUnderlinePositionIsValid_Flag">kUnderlinePositionIsValid Flag</a> is clear, <a href="#SkPaint_FontMetrics_fUnderlinePosition">fUnderlinePosition</a> is zero. |
| |
| <a name="SkPaint_FontMetrics_fStrikeoutThickness"> <code><strong>SkScalar fStrikeoutThickness</strong></code> </a> |
| |
| Strikeout thickness. |
| |
| If the metric is valid, the <a href="#SkPaint_FontMetrics_kStrikeoutThicknessIsValid_Flag">kStrikeoutThicknessIsValid Flag</a> is set in <a href="#SkPaint_FontMetrics_fFlags">fFlags</a>. |
| If <a href="#SkPaint_FontMetrics_kStrikeoutThicknessIsValid_Flag">kStrikeoutThicknessIsValid Flag</a> is clear, <a href="#SkPaint_FontMetrics_fStrikeoutThickness">fStrikeoutThickness</a> is zero. |
| |
| <a name="SkPaint_FontMetrics_fStrikeoutPosition"> <code><strong>SkScalar fStrikeoutPosition</strong></code> </a> |
| |
| Position of the bottom of the strikeout stroke relative to the baseline. |
| Typically negative when valid. |
| |
| If the metric is valid, the <a href="#SkPaint_FontMetrics_kStrikeoutPositionIsValid_Flag">kStrikeoutPositionIsValid Flag</a> is set in <a href="#SkPaint_FontMetrics_fFlags">fFlags</a>. |
| If <a href="#SkPaint_FontMetrics_kStrikeoutPositionIsValid_Flag">kStrikeoutPositionIsValid Flag</a> is clear, <a href="#SkPaint_FontMetrics_fStrikeoutPosition">fStrikeoutPosition</a> is zero. |
| |
| <a name="SkPaint_FontMetrics_hasUnderlineThickness"></a> |
| ## hasUnderlineThickness |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool hasUnderlineThickness(SkScalar* thickness) const |
| </pre> |
| |
| If <a href="#Font_Metrics">Font Metrics</a> has a valid underline <a href="#SkPaint_FontMetrics_hasUnderlineThickness_thickness">thickness</a>, return true, and set |
| <a href="#SkPaint_FontMetrics_hasUnderlineThickness_thickness">thickness</a> to that value. If the underline <a href="#SkPaint_FontMetrics_hasUnderlineThickness_thickness">thickness</a> is not valid, |
| return false, and ignore <a href="#SkPaint_FontMetrics_hasUnderlineThickness_thickness">thickness</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_FontMetrics_hasUnderlineThickness_thickness"> <code><strong>thickness </strong></code> </a></td> <td> |
| storage for underline width</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if font specifies underline width |
| |
| --- |
| |
| <a name="SkPaint_FontMetrics_hasUnderlinePosition"></a> |
| ## hasUnderlinePosition |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool hasUnderlinePosition(SkScalar* position) const |
| </pre> |
| |
| If <a href="#Font_Metrics">Font Metrics</a> has a valid underline <a href="#SkPaint_FontMetrics_hasUnderlinePosition_position">position</a>, return true, and set |
| <a href="#SkPaint_FontMetrics_hasUnderlinePosition_position">position</a> to that value. If the underline <a href="#SkPaint_FontMetrics_hasUnderlinePosition_position">position</a> is not valid, |
| return false, and ignore <a href="#SkPaint_FontMetrics_hasUnderlinePosition_position">position</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_FontMetrics_hasUnderlinePosition_position"> <code><strong>position </strong></code> </a></td> <td> |
| storage for underline <a href="#SkPaint_FontMetrics_hasUnderlinePosition_position">position</a></td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if font specifies underline <a href="#SkPaint_FontMetrics_hasUnderlinePosition_position">position</a> |
| |
| --- |
| |
| <a name="SkPaint_FontMetrics_hasStrikeoutThickness"></a> |
| ## hasStrikeoutThickness |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool hasStrikeoutThickness(SkScalar* thickness) const |
| </pre> |
| |
| If <a href="#Font_Metrics">Font Metrics</a> has a valid strikeout <a href="#SkPaint_FontMetrics_hasStrikeoutThickness_thickness">thickness</a>, return true, and set |
| <a href="#SkPaint_FontMetrics_hasStrikeoutThickness_thickness">thickness</a> to that value. If the underline <a href="#SkPaint_FontMetrics_hasStrikeoutThickness_thickness">thickness</a> is not valid, |
| return false, and ignore <a href="#SkPaint_FontMetrics_hasStrikeoutThickness_thickness">thickness</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_FontMetrics_hasStrikeoutThickness_thickness"> <code><strong>thickness </strong></code> </a></td> <td> |
| storage for strikeout width</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if font specifies strikeout width |
| |
| --- |
| |
| <a name="SkPaint_FontMetrics_hasStrikeoutPosition"></a> |
| ## hasStrikeoutPosition |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool hasStrikeoutPosition(SkScalar* position) const |
| </pre> |
| |
| If <a href="#Font_Metrics">Font Metrics</a> has a valid strikeout <a href="#SkPaint_FontMetrics_hasStrikeoutPosition_position">position</a>, return true, and set |
| <a href="#SkPaint_FontMetrics_hasStrikeoutPosition_position">position</a> to that value. If the underline <a href="#SkPaint_FontMetrics_hasStrikeoutPosition_position">position</a> is not valid, |
| return false, and ignore <a href="#SkPaint_FontMetrics_hasStrikeoutPosition_position">position</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_FontMetrics_hasStrikeoutPosition_position"> <code><strong>position </strong></code> </a></td> <td> |
| storage for strikeout <a href="#SkPaint_FontMetrics_hasStrikeoutPosition_position">position</a></td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if font specifies strikeout <a href="#SkPaint_FontMetrics_hasStrikeoutPosition_position">position</a> |
| |
| --- |
| |
| <a name="SkPaint_getFontMetrics"></a> |
| ## getFontMetrics |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar getFontMetrics(FontMetrics* metrics, SkScalar scale = 0) const |
| </pre> |
| |
| Returns <a href="#Font_Metrics">Font Metrics</a> associated with <a href="undocumented#Typeface">Typeface</a>. |
| The return value is the recommended spacing between lines: the sum of <a href="#SkPaint_getFontMetrics_metrics">metrics</a> |
| descent, ascent, and leading. |
| If <a href="#SkPaint_getFontMetrics_metrics">metrics</a> is not nullptr, <a href="#Font_Metrics">Font Metrics</a> is copied to <a href="#SkPaint_getFontMetrics_metrics">metrics</a>. |
| Results are scaled by <a href="#Text_Size">Text Size</a> but does not take into account |
| dimensions required by <a href="#Text_Scale_X">Text Scale X</a>, <a href="#Text_Skew_X">Text Skew X</a>, <a href="#Fake_Bold">Fake Bold</a>, |
| <a href="#Style_Stroke">Style Stroke</a>, and <a href="undocumented#Path_Effect">Path Effect</a>. |
| Results can be additionally scaled by <a href="#SkPaint_getFontMetrics_scale">scale</a>; a <a href="#SkPaint_getFontMetrics_scale">scale</a> of zero |
| is ignored. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getFontMetrics_metrics"> <code><strong>metrics </strong></code> </a></td> <td> |
| storage for <a href="#Font_Metrics">Font Metrics</a> from <a href="undocumented#Typeface">Typeface</a>; may be nullptr</td> |
| </tr> <tr> <td><a name="SkPaint_getFontMetrics_scale"> <code><strong>scale </strong></code> </a></td> <td> |
| additional multiplier for returned values</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| recommended spacing between lines |
| |
| ### Example |
| |
| <div><fiddle-embed name="b899d84caba6607340322d317992d070"></fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#Text_Size">Text Size</a> <a href="undocumented#Typeface">Typeface</a> <a href="#Typeface_Methods">Typeface Methods</a> |
| |
| --- |
| |
| <a name="SkPaint_getFontSpacing"></a> |
| ## getFontSpacing |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar getFontSpacing() const |
| </pre> |
| |
| Returns the recommended spacing between lines: the sum of metrics |
| descent, ascent, and leading. |
| Result is scaled by <a href="#Text_Size">Text Size</a> but does not take into account |
| dimensions required by stroking and <a href="undocumented#Path_Effect">Path Effect</a>. |
| Returns the same result as <a href="#SkPaint_getFontMetrics">getFontMetrics</a>. |
| |
| ### Return Value |
| |
| recommended spacing between lines |
| |
| ### Example |
| |
| <div><fiddle-embed name="424741e26e1b174e43087d67422ce14f"> |
| |
| #### Example Output |
| |
| ~~~~ |
| textSize: 12 fontSpacing: 13.9688 |
| textSize: 18 fontSpacing: 20.9531 |
| textSize: 24 fontSpacing: 27.9375 |
| textSize: 32 fontSpacing: 37.25 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getFontBounds"></a> |
| ## getFontBounds |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkRect getFontBounds() const |
| </pre> |
| |
| Returns the union of bounds of all <a href="undocumented#Glyph">Glyphs</a>. |
| Returned dimensions are computed by <a href="undocumented#Font_Manager">Font Manager</a> from font data, |
| ignoring <a href="#SkPaint_Hinting">Hinting</a>. Includes <a href="#Text_Size">Text Size</a>, <a href="#Text_Scale_X">Text Scale X</a>, |
| and <a href="#Text_Skew_X">Text Skew X</a>, but not <a href="#Fake_Bold">Fake Bold</a> or <a href="undocumented#Path_Effect">Path Effect</a>. |
| |
| If <a href="#Text_Size">Text Size</a> is large, <a href="#Text_Scale_X">Text Scale X</a> is one, and <a href="#Text_Skew_X">Text Skew X</a> is zero, |
| returns the same bounds as <a href="#Font_Metrics">Font Metrics</a> { <a href="#SkPaint_FontMetrics_fXMin">FontMetrics::fXMin</a>, |
| <a href="#SkPaint_FontMetrics_fTop">FontMetrics::fTop</a>, <a href="#SkPaint_FontMetrics_fXMax">FontMetrics::fXMax</a>, <a href="#SkPaint_FontMetrics_fBottom">FontMetrics::fBottom</a> }. |
| |
| ### Return Value |
| |
| union of bounds of all <a href="undocumented#Glyph">Glyphs</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="facaddeec7943bc491988e345e27e65f"> |
| |
| #### Example Output |
| |
| ~~~~ |
| metrics bounds = { -12.2461, -14.7891, 21.5215, 5.55469 } |
| font bounds = { -12.2461, -14.7891, 21.5215, 5.55469 } |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_textToGlyphs"></a> |
| ## textToGlyphs |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| int textToGlyphs(const void* text, size_t byteLength, SkGlyphID glyphs[]) const |
| </pre> |
| |
| Converts <a href="#SkPaint_textToGlyphs_text">text</a> into glyph indices. |
| Returns the number of glyph indices represented by <a href="#SkPaint_textToGlyphs_text">text</a>. |
| <a href="#Text_Encoding">Text Encoding</a> specifies how <a href="#SkPaint_textToGlyphs_text">text</a> represents characters or <a href="#SkPaint_textToGlyphs_glyphs">glyphs</a>. |
| <a href="#SkPaint_textToGlyphs_glyphs">glyphs</a> may be nullptr, to compute the glyph count. |
| |
| Does not check <a href="#SkPaint_textToGlyphs_text">text</a> for valid character codes or valid glyph indices. |
| |
| If <a href="#SkPaint_textToGlyphs_byteLength">byteLength</a> equals zero, returns zero. |
| If <a href="#SkPaint_textToGlyphs_byteLength">byteLength</a> includes a partial character, the partial character is ignored. |
| |
| If <a href="#Text_Encoding">Text Encoding</a> is <a href="#SkPaint_kUTF8_TextEncoding">kUTF8 TextEncoding</a> and |
| <a href="#SkPaint_textToGlyphs_text">text</a> contains an invalid UTF-8 sequence, zero is returned. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_textToGlyphs_text"> <code><strong>text </strong></code> </a></td> <td> |
| character storage encoded with <a href="#Text_Encoding">Text Encoding</a></td> |
| </tr> <tr> <td><a name="SkPaint_textToGlyphs_byteLength"> <code><strong>byteLength </strong></code> </a></td> <td> |
| length of character storage in bytes</td> |
| </tr> <tr> <td><a name="SkPaint_textToGlyphs_glyphs"> <code><strong>glyphs </strong></code> </a></td> <td> |
| storage for glyph indices; may be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| number of <a href="#SkPaint_textToGlyphs_glyphs">glyphs</a> represented by <a href="#SkPaint_textToGlyphs_text">text</a> of length <a href="#SkPaint_textToGlyphs_byteLength">byteLength</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="343e9471a7f7b5f09abdc3b44983433b"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_countText"></a> |
| ## countText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| int countText(const void* text, size_t byteLength) const |
| </pre> |
| |
| Returns the number of <a href="undocumented#Glyph">Glyphs</a> in <a href="#SkPaint_countText_text">text</a>. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to count the <a href="undocumented#Glyph">Glyphs</a>. |
| Returns the same result as <a href="#SkPaint_textToGlyphs">textToGlyphs</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_countText_text"> <code><strong>text </strong></code> </a></td> <td> |
| character storage encoded with <a href="#Text_Encoding">Text Encoding</a></td> |
| </tr> <tr> <td><a name="SkPaint_countText_byteLength"> <code><strong>byteLength </strong></code> </a></td> <td> |
| length of character storage in bytes</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| number of <a href="undocumented#Glyph">Glyphs</a> represented by <a href="#SkPaint_countText_text">text</a> of length <a href="#SkPaint_countText_byteLength">byteLength</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="85436c71aab5410767fc688ab0573e09"> |
| |
| #### Example Output |
| |
| ~~~~ |
| count = 5 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_containsText"></a> |
| ## containsText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool containsText(const void* text, size_t byteLength) const |
| </pre> |
| |
| Returns true if all <a href="#SkPaint_containsText_text">text</a> corresponds to a non-zero glyph index. |
| Returns false if any characters in <a href="#SkPaint_containsText_text">text</a> are not supported in |
| <a href="undocumented#Typeface">Typeface</a>. |
| |
| If <a href="#Text_Encoding">Text Encoding</a> is <a href="#SkPaint_kGlyphID_TextEncoding">kGlyphID TextEncoding</a>, |
| returns true if all glyph indices in <a href="#SkPaint_containsText_text">text</a> are non-zero; |
| does not check to see if <a href="#SkPaint_containsText_text">text</a> contains valid glyph indices for <a href="undocumented#Typeface">Typeface</a>. |
| |
| Returns true if <a href="#SkPaint_containsText_byteLength">byteLength</a> is zero. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_containsText_text"> <code><strong>text </strong></code> </a></td> <td> |
| array of characters or <a href="undocumented#Glyph">Glyphs</a></td> |
| </tr> <tr> <td><a name="SkPaint_containsText_byteLength"> <code><strong>byteLength </strong></code> </a></td> <td> |
| number of bytes in <a href="#SkPaint_containsText_text">text</a> array</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| true if all <a href="#SkPaint_containsText_text">text</a> corresponds to a non-zero glyph index |
| |
| ### Example |
| |
| <div><fiddle-embed name="71b417d6651cbcecae1a05067c94ab3e"><div><a href="#SkPaint_containsText">containsText</a> succeeds for degree symbol, but cannot find a glyph index |
| corresponding to the Unicode surrogate code point. |
| </div> |
| |
| #### Example Output |
| |
| ~~~~ |
| 0x00b0 == has char |
| 0xd800 != has char |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### Example |
| |
| <div><fiddle-embed name="083557b6f653d6fc00a34e01f87b74ff"><div><a href="#SkPaint_containsText">containsText</a> returns true that glyph index is greater than zero, not |
| that it corresponds to an entry in <a href="undocumented#Typeface">Typeface</a>. |
| </div> |
| |
| #### Example Output |
| |
| ~~~~ |
| 0x01ff == has glyph |
| 0x0000 != has glyph |
| 0xffff == has glyph |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="#SkPaint_setTextEncoding">setTextEncoding</a> <a href="undocumented#Typeface">Typeface</a> |
| |
| --- |
| |
| <a name="SkPaint_glyphsToUnichars"></a> |
| ## glyphsToUnichars |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void glyphsToUnichars(const SkGlyphID glyphs[], int count, SkUnichar text[]) const |
| </pre> |
| |
| Converts <a href="#SkPaint_glyphsToUnichars_glyphs">glyphs</a> into <a href="#SkPaint_glyphsToUnichars_text">text</a> if possible. |
| <a href="undocumented#Glyph">Glyph</a> values without direct Unicode equivalents are mapped to zero. |
| Uses the <a href="undocumented#Typeface">Typeface</a>, but is unaffected |
| by <a href="#Text_Encoding">Text Encoding</a>; the <a href="#SkPaint_glyphsToUnichars_text">text</a> values returned are equivalent to <a href="#SkPaint_kUTF32_TextEncoding">kUTF32 TextEncoding</a>. |
| |
| Only supported on platforms that use FreeType as the <a href="undocumented#Engine">Font Engine</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_glyphsToUnichars_glyphs"> <code><strong>glyphs </strong></code> </a></td> <td> |
| array of indices into font</td> |
| </tr> <tr> <td><a name="SkPaint_glyphsToUnichars_count"> <code><strong>count </strong></code> </a></td> <td> |
| length of glyph array</td> |
| </tr> <tr> <td><a name="SkPaint_glyphsToUnichars_text"> <code><strong>text </strong></code> </a></td> <td> |
| storage for character codes, one per glyph</td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="c12686b0b3e0a87d0a248bbfc57e9492"><div>Convert UTF-8 <a href="#SkPaint_glyphsToUnichars_text">text</a> to <a href="#SkPaint_glyphsToUnichars_glyphs">glyphs</a>; then convert <a href="#SkPaint_glyphsToUnichars_glyphs">glyphs</a> to Unichar code points. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Measure_Text"></a> Measure Text |
| |
| <a name="SkPaint_measureText"></a> |
| ## measureText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar measureText(const void* text, size_t length, SkRect* bounds) const |
| </pre> |
| |
| Returns the advance width of <a href="#SkPaint_measureText_text">text</a> if <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is clear, |
| and the height of <a href="#SkPaint_measureText_text">text</a> if <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is set. |
| The advance is the normal distance to move before drawing additional <a href="#SkPaint_measureText_text">text</a>. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_measureText_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the font metrics, |
| and <a href="#Text_Size">Text Size</a>, <a href="#Text_Scale_X">Text Scale X</a>, <a href="#Text_Skew_X">Text Skew X</a>, <a href="#Stroke_Width">Stroke Width</a>, and |
| <a href="undocumented#Path_Effect">Path Effect</a> to scale the metrics and <a href="#SkPaint_measureText_bounds">bounds</a>. |
| Returns the bounding box of <a href="#SkPaint_measureText_text">text</a> if <a href="#SkPaint_measureText_bounds">bounds</a> is not nullptr. |
| The bounding box is computed as if the <a href="#SkPaint_measureText_text">text</a> was drawn at the origin. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_measureText_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices to be measured</td> |
| </tr> <tr> <td><a name="SkPaint_measureText_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_measureText_text">text</a> to measure</td> |
| </tr> <tr> <td><a name="SkPaint_measureText_bounds"> <code><strong>bounds </strong></code> </a></td> <td> |
| returns bounding box relative to (0, 0) if not nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| advance width or height |
| |
| ### Example |
| |
| <div><fiddle-embed name="06084f609184470135a9cd9ebc5af149"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_measureText_2"></a> |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| SkScalar measureText(const void* text, size_t length) const |
| </pre> |
| |
| Returns the advance width of <a href="#SkPaint_measureText_2_text">text</a> if <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is clear, |
| and the height of <a href="#SkPaint_measureText_2_text">text</a> if <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is set. |
| The advance is the normal distance to move before drawing additional <a href="#SkPaint_measureText_2_text">text</a>. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_measureText_2_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the font metrics, |
| and <a href="#Text_Size">Text Size</a> to scale the metrics. |
| Does not scale the advance or bounds by <a href="#Fake_Bold">Fake Bold</a> or <a href="undocumented#Path_Effect">Path Effect</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_measureText_2_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices to be measured</td> |
| </tr> <tr> <td><a name="SkPaint_measureText_2_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_measureText_2_text">text</a> to measure</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| advance width or height |
| |
| ### Example |
| |
| <div><fiddle-embed name="f1139a5ddd17fd47c2f45f6e642cac76"> |
| |
| #### Example Output |
| |
| ~~~~ |
| default width = 5 |
| double width = 10 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_breakText"></a> |
| ## breakText |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| size_t breakText(const void* text, size_t length, SkScalar maxWidth, |
| SkScalar* measuredWidth = nullptr) const |
| </pre> |
| |
| Returns the bytes of <a href="#SkPaint_breakText_text">text</a> that fit within <a href="#SkPaint_breakText_maxWidth">maxWidth</a>. |
| If <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is clear, the <a href="#SkPaint_breakText_text">text</a> fragment fits if its advance width is less than or |
| equal to <a href="#SkPaint_breakText_maxWidth">maxWidth</a>. |
| If <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is set, the <a href="#SkPaint_breakText_text">text</a> fragment fits if its advance height is less than or |
| equal to <a href="#SkPaint_breakText_maxWidth">maxWidth</a>. |
| Measures only while the advance is less than or equal to <a href="#SkPaint_breakText_maxWidth">maxWidth</a>. |
| Returns the advance or the <a href="#SkPaint_breakText_text">text</a> fragment in <a href="#SkPaint_breakText_measuredWidth">measuredWidth</a> if it not nullptr. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_breakText_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the font metrics, |
| and <a href="#Text_Size">Text Size</a> to scale the metrics. |
| Does not scale the advance or bounds by <a href="#Fake_Bold">Fake Bold</a> or <a href="undocumented#Path_Effect">Path Effect</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_breakText_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices to be measured</td> |
| </tr> <tr> <td><a name="SkPaint_breakText_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_breakText_text">text</a> to measure</td> |
| </tr> <tr> <td><a name="SkPaint_breakText_maxWidth"> <code><strong>maxWidth </strong></code> </a></td> <td> |
| advance limit; <a href="#SkPaint_breakText_text">text</a> is measured while advance is less than <a href="#SkPaint_breakText_maxWidth">maxWidth</a></td> |
| </tr> <tr> <td><a name="SkPaint_breakText_measuredWidth"> <code><strong>measuredWidth </strong></code> </a></td> <td> |
| returns the width of the <a href="#SkPaint_breakText_text">text</a> less than or equal to <a href="#SkPaint_breakText_maxWidth">maxWidth</a></td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| bytes of <a href="#SkPaint_breakText_text">text</a> that fit, always less than or equal to <a href="#SkPaint_breakText_length">length</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="fd0033470ccbd5c7059670fdbf96cffc"><div><a href="undocumented#Line">Line</a> under "" shows desired width, shorter than available characters. |
| <a href="undocumented#Line">Line</a> under "" shows measured width after breaking <a href="#SkPaint_breakText_text">text</a>. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getTextWidths"></a> |
| ## getTextWidths |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| int getTextWidths(const void* text, size_t byteLength, SkScalar widths[], SkRect bounds[] = nullptr) const |
| </pre> |
| |
| Retrieves the advance and <a href="#SkPaint_getTextWidths_bounds">bounds</a> for each glyph in <a href="#SkPaint_getTextWidths_text">text</a>, and returns |
| the glyph count in <a href="#SkPaint_getTextWidths_text">text</a>. |
| Both <a href="#SkPaint_getTextWidths_widths">widths</a> and <a href="#SkPaint_getTextWidths_bounds">bounds</a> may be nullptr. |
| If <a href="#SkPaint_getTextWidths_widths">widths</a> is not nullptr, <a href="#SkPaint_getTextWidths_widths">widths</a> must be an array of glyph count entries. |
| if <a href="#SkPaint_getTextWidths_bounds">bounds</a> is not nullptr, <a href="#SkPaint_getTextWidths_bounds">bounds</a> must be an array of glyph count entries. |
| If <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is clear, <a href="#SkPaint_getTextWidths_widths">widths</a> returns the horizontal advance. |
| If <a href="#SkPaint_kVerticalText_Flag">kVerticalText Flag</a> is set, <a href="#SkPaint_getTextWidths_widths">widths</a> returns the vertical advance. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_getTextWidths_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the font metrics, |
| and <a href="#Text_Size">Text Size</a> to scale the <a href="#SkPaint_getTextWidths_widths">widths</a> and <a href="#SkPaint_getTextWidths_bounds">bounds</a>. |
| Does not scale the advance by <a href="#Fake_Bold">Fake Bold</a> or <a href="undocumented#Path_Effect">Path Effect</a>. |
| Does include <a href="#Fake_Bold">Fake Bold</a> and <a href="undocumented#Path_Effect">Path Effect</a> in the <a href="#SkPaint_getTextWidths_bounds">bounds</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getTextWidths_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices to be measured</td> |
| </tr> <tr> <td><a name="SkPaint_getTextWidths_byteLength"> <code><strong>byteLength </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_getTextWidths_text">text</a> to measure</td> |
| </tr> <tr> <td><a name="SkPaint_getTextWidths_widths"> <code><strong>widths </strong></code> </a></td> <td> |
| returns <a href="#SkPaint_getTextWidths_text">text</a> advances for each glyph; may be nullptr</td> |
| </tr> <tr> <td><a name="SkPaint_getTextWidths_bounds"> <code><strong>bounds </strong></code> </a></td> <td> |
| returns <a href="#SkPaint_getTextWidths_bounds">bounds</a> for each glyph relative to (0, 0); may be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| glyph count in <a href="#SkPaint_getTextWidths_text">text</a> |
| |
| ### Example |
| |
| <div><fiddle-embed name="6b9e101f49e9c2c28755c5bdcef64dfb"><div>Bounds of <a href="undocumented#Glyph">Glyphs</a> increase for stroked <a href="#SkPaint_getTextWidths_text">text</a>, but <a href="#SkPaint_getTextWidths_text">text</a> advance remains the same. |
| The underlines show the <a href="#SkPaint_getTextWidths_text">text</a> advance, spaced to keep them distinct. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Text_Path"></a> Text Path |
| |
| <a href="#Text_Path">Text Path</a> describes the geometry of <a href="undocumented#Glyph">Glyphs</a> used to draw text. |
| |
| <a name="SkPaint_getTextPath"></a> |
| ## getTextPath |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void getTextPath(const void* text, size_t length, SkScalar x, SkScalar y, SkPath* path) const |
| </pre> |
| |
| Returns the geometry as <a href="SkPath_Reference#Path">Path</a> equivalent to the drawn <a href="#SkPaint_getTextPath_text">text</a>. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_getTextPath_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the glyph paths, |
| and <a href="#Text_Size">Text Size</a>, <a href="#Fake_Bold">Fake Bold</a>, and <a href="undocumented#Path_Effect">Path Effect</a> to scale and modify the glyph paths. |
| All of the glyph paths are stored in <a href="#SkPaint_getTextPath_path">path</a>. |
| Uses <a href="#SkPaint_getTextPath_x">x</a>, <a href="#SkPaint_getTextPath_y">y</a>, and <a href="#Text_Align">Text Align</a> to position <a href="#SkPaint_getTextPath_path">path</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getTextPath_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices</td> |
| </tr> <tr> <td><a name="SkPaint_getTextPath_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_getTextPath_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getTextPath_x"> <code><strong>x </strong></code> </a></td> <td> |
| <a href="#SkPaint_getTextPath_x">x</a>-coordinate of the origin of the <a href="#SkPaint_getTextPath_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getTextPath_y"> <code><strong>y </strong></code> </a></td> <td> |
| <a href="#SkPaint_getTextPath_y">y</a>-coordinate of the origin of the <a href="#SkPaint_getTextPath_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getTextPath_path"> <code><strong>path </strong></code> </a></td> <td> |
| geometry of the <a href="undocumented#Glyph">Glyphs</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="7c9e6a399f898d68026c1f0865e6f73e"><div><a href="undocumented#Text">Text</a> is added to <a href="SkPath_Reference#Path">Path</a>, offset, and subtracted from <a href="SkPath_Reference#Path">Path</a>, then added at |
| the offset location. The result is rendered with one draw call. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getPosTextPath"></a> |
| ## getPosTextPath |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void getPosTextPath(const void* text, size_t length, const SkPoint pos[], SkPath* path) const |
| </pre> |
| |
| Returns the geometry as <a href="SkPath_Reference#Path">Path</a> equivalent to the drawn <a href="#SkPaint_getPosTextPath_text">text</a>. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_getPosTextPath_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the glyph paths, |
| and <a href="#Text_Size">Text Size</a>, <a href="#Fake_Bold">Fake Bold</a>, and <a href="undocumented#Path_Effect">Path Effect</a> to scale and modify the glyph paths. |
| All of the glyph paths are stored in <a href="#SkPaint_getPosTextPath_path">path</a>. |
| Uses <a href="#SkPaint_getPosTextPath_pos">pos</a> array and <a href="#Text_Align">Text Align</a> to position <a href="#SkPaint_getPosTextPath_path">path</a>. |
| <a href="#SkPaint_getPosTextPath_pos">pos</a> contains a position for each glyph. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getPosTextPath_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextPath_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_getPosTextPath_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextPath_pos"> <code><strong>pos </strong></code> </a></td> <td> |
| positions of each glyph</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextPath_path"> <code><strong>path </strong></code> </a></td> <td> |
| geometry of the <a href="undocumented#Glyph">Glyphs</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="7f27c93472aa99a7542fb3493076f072"><div>Simplifies three <a href="undocumented#Glyph">Glyphs</a> to eliminate overlaps, and strokes the result. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Text_Intercepts"></a> Text Intercepts |
| |
| <a href="#Text_Intercepts">Text Intercepts</a> describe the intersection of drawn text <a href="undocumented#Glyph">Glyphs</a> with a pair |
| of lines parallel to the text advance. <a href="#Text_Intercepts">Text Intercepts</a> permits creating a |
| underline that skips Descenders. |
| |
| <a name="SkPaint_getTextIntercepts"></a> |
| ## getTextIntercepts |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| int getTextIntercepts(const void* text, size_t length, SkScalar x, SkScalar y, |
| const SkScalar bounds[2], SkScalar* intervals) const |
| </pre> |
| |
| Returns the number of <a href="#SkPaint_getTextIntercepts_intervals">intervals</a> that intersect <a href="#SkPaint_getTextIntercepts_bounds">bounds</a>. |
| <a href="#SkPaint_getTextIntercepts_bounds">bounds</a> describes a pair of lines parallel to the <a href="#SkPaint_getTextIntercepts_text">text</a> advance. |
| The return count is zero or a multiple of two, and is at most twice the number of <a href="undocumented#Glyph">Glyphs</a> in |
| the string. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_getTextIntercepts_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the glyph paths, |
| and <a href="#Text_Size">Text Size</a>, <a href="#Fake_Bold">Fake Bold</a>, and <a href="undocumented#Path_Effect">Path Effect</a> to scale and modify the glyph paths. |
| Uses <a href="#SkPaint_getTextIntercepts_x">x</a>, <a href="#SkPaint_getTextIntercepts_y">y</a>, and <a href="#Text_Align">Text Align</a> to position <a href="#SkPaint_getTextIntercepts_intervals">intervals</a>. |
| |
| Pass nullptr for <a href="#SkPaint_getTextIntercepts_intervals">intervals</a> to determine the size of the interval array. |
| |
| <a href="#SkPaint_getTextIntercepts_intervals">intervals</a> are cached to improve performance for multiple calls. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getTextIntercepts_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices</td> |
| </tr> <tr> <td><a name="SkPaint_getTextIntercepts_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_getTextIntercepts_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getTextIntercepts_x"> <code><strong>x </strong></code> </a></td> <td> |
| <a href="#SkPaint_getTextIntercepts_x">x</a>-coordinate of the origin of the <a href="#SkPaint_getTextIntercepts_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getTextIntercepts_y"> <code><strong>y </strong></code> </a></td> <td> |
| <a href="#SkPaint_getTextIntercepts_y">y</a>-coordinate of the origin of the <a href="#SkPaint_getTextIntercepts_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getTextIntercepts_bounds"> <code><strong>bounds </strong></code> </a></td> <td> |
| lower and upper line parallel to the advance</td> |
| </tr> <tr> <td><a name="SkPaint_getTextIntercepts_intervals"> <code><strong>intervals </strong></code> </a></td> <td> |
| returned intersections; may be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| number of intersections; may be zero |
| |
| ### Example |
| |
| <div><fiddle-embed name="2a0b80ed20d193c688085b79deb5bdc9"><div>Underline uses intercepts to draw on either side of the glyph Descender. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getPosTextIntercepts"></a> |
| ## getPosTextIntercepts |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| int getPosTextIntercepts(const void* text, size_t length, const SkPoint pos[], |
| const SkScalar bounds[2], SkScalar* intervals) const |
| </pre> |
| |
| Returns the number of <a href="#SkPaint_getPosTextIntercepts_intervals">intervals</a> that intersect <a href="#SkPaint_getPosTextIntercepts_bounds">bounds</a>. |
| <a href="#SkPaint_getPosTextIntercepts_bounds">bounds</a> describes a pair of lines parallel to the <a href="#SkPaint_getPosTextIntercepts_text">text</a> advance. |
| The return count is zero or a multiple of two, and is at most twice the number of <a href="undocumented#Glyph">Glyphs</a> in |
| the string. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_getPosTextIntercepts_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the glyph paths, |
| and <a href="#Text_Size">Text Size</a>, <a href="#Fake_Bold">Fake Bold</a>, and <a href="undocumented#Path_Effect">Path Effect</a> to scale and modify the glyph paths. |
| Uses <a href="#SkPaint_getPosTextIntercepts_pos">pos</a> array and <a href="#Text_Align">Text Align</a> to position <a href="#SkPaint_getPosTextIntercepts_intervals">intervals</a>. |
| |
| Pass nullptr for <a href="#SkPaint_getPosTextIntercepts_intervals">intervals</a> to determine the size of the interval array. |
| |
| <a href="#SkPaint_getPosTextIntercepts_intervals">intervals</a> are cached to improve performance for multiple calls. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getPosTextIntercepts_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextIntercepts_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_getPosTextIntercepts_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextIntercepts_pos"> <code><strong>pos </strong></code> </a></td> <td> |
| positions of each glyph</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextIntercepts_bounds"> <code><strong>bounds </strong></code> </a></td> <td> |
| lower and upper line parallel to the advance</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextIntercepts_intervals"> <code><strong>intervals </strong></code> </a></td> <td> |
| returned intersections; may be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| number of intersections; may be zero |
| |
| ### Example |
| |
| <div><fiddle-embed name="98b2dfc552d0540a7c041fe7a2839bd7"><div><a href="undocumented#Text">Text</a> intercepts draw on either side of, but not inside, <a href="undocumented#Glyph">Glyphs</a> in a run. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getPosTextHIntercepts"></a> |
| ## getPosTextHIntercepts |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| int getPosTextHIntercepts(const void* text, size_t length, const SkScalar xpos[], SkScalar constY, |
| const SkScalar bounds[2], SkScalar* intervals) const |
| </pre> |
| |
| Returns the number of <a href="#SkPaint_getPosTextHIntercepts_intervals">intervals</a> that intersect <a href="#SkPaint_getPosTextHIntercepts_bounds">bounds</a>. |
| <a href="#SkPaint_getPosTextHIntercepts_bounds">bounds</a> describes a pair of lines parallel to the <a href="#SkPaint_getPosTextHIntercepts_text">text</a> advance. |
| The return count is zero or a multiple of two, and is at most twice the number of <a href="undocumented#Glyph">Glyphs</a> in |
| the string. |
| Uses <a href="#Text_Encoding">Text Encoding</a> to decode <a href="#SkPaint_getPosTextHIntercepts_text">text</a>, <a href="undocumented#Typeface">Typeface</a> to get the glyph paths, |
| and <a href="#Text_Size">Text Size</a>, <a href="#Fake_Bold">Fake Bold</a>, and <a href="undocumented#Path_Effect">Path Effect</a> to scale and modify the glyph paths. |
| Uses <a href="#SkPaint_getPosTextHIntercepts_xpos">xpos</a> array, <a href="#SkPaint_getPosTextHIntercepts_constY">constY</a>, and <a href="#Text_Align">Text Align</a> to position <a href="#SkPaint_getPosTextHIntercepts_intervals">intervals</a>. |
| |
| Pass nullptr for <a href="#SkPaint_getPosTextHIntercepts_intervals">intervals</a> to determine the size of the interval array. |
| |
| <a href="#SkPaint_getPosTextHIntercepts_intervals">intervals</a> are cached to improve performance for multiple calls. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getPosTextHIntercepts_text"> <code><strong>text </strong></code> </a></td> <td> |
| character codes or glyph indices</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextHIntercepts_length"> <code><strong>length </strong></code> </a></td> <td> |
| number of bytes of <a href="#SkPaint_getPosTextHIntercepts_text">text</a></td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextHIntercepts_xpos"> <code><strong>xpos </strong></code> </a></td> <td> |
| positions of each glyph in x</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextHIntercepts_constY"> <code><strong>constY </strong></code> </a></td> <td> |
| position of each glyph in y</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextHIntercepts_bounds"> <code><strong>bounds </strong></code> </a></td> <td> |
| lower and upper line parallel to the advance</td> |
| </tr> <tr> <td><a name="SkPaint_getPosTextHIntercepts_intervals"> <code><strong>intervals </strong></code> </a></td> <td> |
| returned intersections; may be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| number of intersections; may be zero |
| |
| ### Example |
| |
| <div><fiddle-embed name="dc9851c43acc3716aca8c9a4d40d452d"><div><a href="undocumented#Text">Text</a> intercepts do not take stroke thickness into consideration. |
| </div></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_getTextBlobIntercepts"></a> |
| ## getTextBlobIntercepts |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| int getTextBlobIntercepts(const SkTextBlob* blob, const SkScalar bounds[2], SkScalar* intervals) const |
| </pre> |
| |
| Returns the number of <a href="#SkPaint_getTextBlobIntercepts_intervals">intervals</a> that intersect <a href="#SkPaint_getTextBlobIntercepts_bounds">bounds</a>. |
| <a href="#SkPaint_getTextBlobIntercepts_bounds">bounds</a> 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 <a href="undocumented#Glyph">Glyphs</a> in |
| the string. |
| Uses <a href="undocumented#Typeface">Typeface</a> to get the glyph paths, |
| and <a href="#Text_Size">Text Size</a>, <a href="#Fake_Bold">Fake Bold</a>, and <a href="undocumented#Path_Effect">Path Effect</a> to scale and modify the glyph paths. |
| Uses run array and <a href="#Text_Align">Text Align</a> to position <a href="#SkPaint_getTextBlobIntercepts_intervals">intervals</a>. |
| |
| <a href="#Text_Encoding">Text Encoding</a> must be set to <a href="#SkPaint_kGlyphID_TextEncoding">SkPaint::kGlyphID TextEncoding</a>. |
| |
| Pass nullptr for <a href="#SkPaint_getTextBlobIntercepts_intervals">intervals</a> to determine the size of the interval array. |
| |
| <a href="#SkPaint_getTextBlobIntercepts_intervals">intervals</a> are cached to improve performance for multiple calls. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_getTextBlobIntercepts_blob"> <code><strong>blob </strong></code> </a></td> <td> |
| <a href="undocumented#Glyph">Glyphs</a>, positions, and text paint attributes</td> |
| </tr> <tr> <td><a name="SkPaint_getTextBlobIntercepts_bounds"> <code><strong>bounds </strong></code> </a></td> <td> |
| lower and upper line parallel to the advance</td> |
| </tr> <tr> <td><a name="SkPaint_getTextBlobIntercepts_intervals"> <code><strong>intervals </strong></code> </a></td> <td> |
| returned intersections; may be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| number of intersections; may be zero |
| |
| ### Example |
| |
| <div><fiddle-embed name="f2229dd5c8e76f9e12fafe59b61353c8"></fiddle-embed></div> |
| |
| --- |
| |
| <a name="SkPaint_nothingToDraw"></a> |
| ## nothingToDraw |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool nothingToDraw() const |
| </pre> |
| |
| Returns true if <a href="#Paint">Paint</a> prevents all drawing; |
| otherwise, the <a href="#Paint">Paint</a> may or may not allow drawing. |
| |
| Returns true if, for example, <a href="undocumented#Blend_Mode">Blend Mode</a> combined with <a href="SkColor_Reference#Alpha">Color Alpha</a> computes a |
| new <a href="SkColor_Reference#Alpha">Alpha</a> of zero. |
| |
| ### Return Value |
| |
| true if <a href="#Paint">Paint</a> prevents all drawing |
| |
| ### Example |
| |
| <div><fiddle-embed name="2973b05bfbb6b4c29332c8ac4fcf3995"> |
| |
| #### 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 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| --- |
| |
| ## <a name="Fast_Bounds"></a> Fast Bounds |
| |
| <a href="#Fast_Bounds">Fast Bounds</a> methods conservatively outset a drawing bounds by additional area |
| <a href="#Paint">Paint</a> may draw to. |
| |
| <a name="SkPaint_canComputeFastBounds"></a> |
| ## canComputeFastBounds |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| bool canComputeFastBounds() const |
| </pre> |
| |
| Returns true if <a href="#Paint">Paint</a> does not include elements requiring extensive computation |
| to compute <a href="undocumented#Device">Device</a> bounds of drawn geometry. For instance, <a href="#Paint">Paint</a> with <a href="undocumented#Path_Effect">Path Effect</a> |
| always returns false. |
| |
| ### Return Value |
| |
| true if <a href="#Paint">Paint</a> allows for fast computation of bounds |
| |
| --- |
| |
| <a name="SkPaint_computeFastBounds"></a> |
| ## computeFastBounds |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| const SkRect& computeFastBounds(const SkRect& orig, SkRect* storage) const |
| </pre> |
| |
| Only call this if <a href="#SkPaint_canComputeFastBounds">canComputeFastBounds</a> 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 <a href="#SkPaint_computeFastBounds_storage">storage</a> |
| parameter. It returns the adjusted bounds that can then be used |
| for <a href="SkCanvas_Reference#SkCanvas_quickReject">SkCanvas::quickReject</a> tests. |
| |
| The returned <a href="SkRect_Reference#Rect">Rect</a> will either be <a href="#SkPaint_computeFastBounds_orig">orig</a> or <a href="#SkPaint_computeFastBounds_storage">storage</a>, thus the caller |
| should not rely on <a href="#SkPaint_computeFastBounds_storage">storage</a> being set to the result, but should always |
| use the returned value. It is legal for <a href="#SkPaint_computeFastBounds_orig">orig</a> and <a href="#SkPaint_computeFastBounds_storage">storage</a> to be the same |
| <a href="SkRect_Reference#Rect">Rect</a>. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_computeFastBounds_orig"> <code><strong>orig </strong></code> </a></td> <td> |
| geometry modified by <a href="#Paint">Paint</a> when drawn</td> |
| </tr> <tr> <td><a name="SkPaint_computeFastBounds_storage"> <code><strong>storage </strong></code> </a></td> <td> |
| computed bounds of geometry; may not be nullptr</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| fast computed bounds |
| |
| --- |
| |
| <a name="SkPaint_computeFastStrokeBounds"></a> |
| ## computeFastStrokeBounds |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| const SkRect& computeFastStrokeBounds(const SkRect& orig, SkRect* storage) const |
| </pre> |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_computeFastStrokeBounds_orig"> <code><strong>orig </strong></code> </a></td> <td> |
| geometry modified by <a href="#Paint">Paint</a> when drawn</td> |
| </tr> <tr> <td><a name="SkPaint_computeFastStrokeBounds_storage"> <code><strong>storage </strong></code> </a></td> <td> |
| computed bounds of geometry</td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| fast computed bounds |
| |
| --- |
| |
| <a name="SkPaint_doComputeFastBounds"></a> |
| ## doComputeFastBounds |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| const SkRect& doComputeFastBounds(const SkRect& orig, SkRect* storage, Style style) const |
| </pre> |
| |
| Computes the bounds, overriding the <a href="#Paint">Paint</a> <a href="#SkPaint_Style">Style</a>. This can be used to |
| account for additional width required by stroking <a href="#SkPaint_doComputeFastBounds_orig">orig</a>, without |
| altering <a href="#SkPaint_Style">Style</a> set to fill. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_doComputeFastBounds_orig"> <code><strong>orig </strong></code> </a></td> <td> |
| geometry modified by <a href="#Paint">Paint</a> when drawn</td> |
| </tr> <tr> <td><a name="SkPaint_doComputeFastBounds_storage"> <code><strong>storage </strong></code> </a></td> <td> |
| computed bounds of geometry</td> |
| </tr> <tr> <td><a name="SkPaint_doComputeFastBounds_style"> <code><strong>style </strong></code> </a></td> <td> |
| overrides <a href="#SkPaint_Style">Style</a></td> |
| </tr> |
| </table> |
| |
| ### Return Value |
| |
| fast computed bounds |
| |
| --- |
| |
| ## <a name="Utility"></a> Utility |
| |
| | name | description | |
| | --- | --- | |
| | <a href="#SkPaint_containsText">containsText</a> | returns if all text corresponds to <a href="undocumented#Glyph">Glyphs</a> | |
| | <a href="#SkPaint_countText">countText</a> | returns number of <a href="undocumented#Glyph">Glyphs</a> in text | |
| | <a href="#SkPaint_glyphsToUnichars">glyphsToUnichars</a> | converts <a href="undocumented#Glyph">Glyphs</a> into text | |
| | <a href="#SkPaint_nothingToDraw">nothingToDraw</a> | returns true if <a href="#Paint">Paint</a> prevents all drawing | |
| | <a href="#SkPaint_textToGlyphs">textToGlyphs</a> | converts text into glyph indices | |
| | <a href="#SkPaint_toString">toString</a> | converts <a href="#Paint">Paint</a> to machine readable form | |
| |
| <a name="SkPaint_toString"></a> |
| ## toString |
| |
| <pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0"> |
| void toString(SkString* str) const |
| </pre> |
| |
| Creates string representation of <a href="#Paint">Paint</a>. The representation is read by |
| internal debugging tools. |
| |
| ### Parameters |
| |
| <table> <tr> <td><a name="SkPaint_toString_str"> <code><strong>str </strong></code> </a></td> <td> |
| storage for string representation of <a href="#Paint">Paint</a></td> |
| </tr> |
| </table> |
| |
| ### Example |
| |
| <div><fiddle-embed name="5670c04b4562908169a776c48c92d104"> |
| |
| #### Example Output |
| |
| ~~~~ |
| text size = 12 |
| ~~~~ |
| |
| </fiddle-embed></div> |
| |
| ### See Also |
| |
| <a href="undocumented#SkPathEffect_toString">SkPathEffect::toString</a> <a href="undocumented#SkMaskFilter_toString">SkMaskFilter::toString</a> <a href="undocumented#SkColorFilter_toString">SkColorFilter::toString</a> <a href="undocumented#SkImageFilter_toString">SkImageFilter::toString</a> |
| |
| --- |
| |