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skia2/site/user/api/undocumented.md
Cary Clark 7e69c8f348 fix paint docs 
quick and dirty edit to get the bots green.
Larger edit is in the works to bring docs
related to these changes up to date.

TBR=reed@google.com

Docs-Preview: https://skia.org/?cl=168923
Bug: skia:
Change-Id: I38af409e75e46439288e94de2758b34094d0e08f
Reviewed-on: https://skia-review.googlesource.com/c/168923
Commit-Queue: Cary Clark <caryclark@skia.org>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
2018-11-07 02:10:01 +00:00

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undocumented
===
<a name='SkBBHFactory'></a>
---
<a name='GrBackendSemaphore'></a>
---
<a name='SkClipOp'></a>
---
### Constants
<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkClipOp_kDifference'><code>SkClipOp::kDifference</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkClipOp_kIntersect'><code>SkClipOp::kIntersect</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='SkColorFilter'></a>
---
<a name='SkColorSpace'></a>
---
<a name='SkColorSpace_MakeSRGBLinear'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
static <a href='#sk_sp'>sk sp</a>&lt;<a href='#SkColorSpace'>SkColorSpace</a>&gt; <a href='#SkColorSpace_MakeSRGBLinear'>MakeSRGBLinear</a>()
</pre>
<a name='SkColorSpace_gammaCloseToSRGB'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#SkColorSpace_gammaCloseToSRGB'>gammaCloseToSRGB</a>() const
</pre>
<a name='SkColorSpace_Equals'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
static bool <a href='#SkColorSpace_Equals'>Equals</a>(const <a href='#SkColorSpace'>SkColorSpace</a>* src, const <a href='#SkColorSpace'>SkColorSpace</a>* dst)
</pre>
<a name='SkCreateColorSpaceXformCanvas'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
std::unique_ptr&lt;<a href='SkCanvas_Reference#SkCanvas'>SkCanvas</a>&gt; SK_API <a href='#SkCreateColorSpaceXformCanvas'>SkCreateColorSpaceXformCanvas</a>(<a href='SkCanvas_Reference#SkCanvas'>SkCanvas</a>* target,
<a href='#sk_sp'>sk sp</a>&lt;<a href='#SkColorSpace'>SkColorSpace</a>&gt; targetCS)
</pre>
<a name='SkData'></a>
---
<a name='SkDebugCanvas'></a>
---
<a name='SkDebugf'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
SK_API void <a href='#SkDebugf'>SkDebugf</a>(const char format[], ...)
</pre>
<a name='SkDeferredDisplayList'></a>
---
<a name='Recorder'></a>
<a name='SkDeferredDisplayListRecorder'></a>
---
<a name='SkDeserialProcs'></a>
---<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Type</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Member</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkDeserialPictureProc</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkDeserialProcs_fPictureProc'><code>fPictureProc</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>void*</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkDeserialProcs_fPictureCtx'><code>fPictureCtx</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkDeserialTypefaceProc</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkDeserialProcs_fTypefaceProc'><code>fTypefaceProc</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>void*</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkDeserialProcs_fTypefaceCtx'><code>fTypefaceCtx</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='SkBaseDevice'></a>
---
<a name='SkDocument'></a>
---
<a name='SkDocument_beginPage'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
<a href='SkCanvas_Reference#SkCanvas'>SkCanvas</a>* <a href='#SkDocument_beginPage'>beginPage</a>(<a href='#SkScalar'>SkScalar</a> width, <a href='#SkScalar'>SkScalar</a> height, const <a href='SkRect_Reference#SkRect'>SkRect</a>* content = NULL)
</pre>
<a name='PDF'></a>
<a name='SkDrawLooper'></a>
---
<a name='SkDrawable'></a>
---
<a name='SkDrawable_draw'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
void <a href='#SkDrawable_draw'>draw</a>(<a href='SkCanvas_Reference#SkCanvas'>SkCanvas</a>*, const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* = NULL)
</pre>
<a name='SkFilterQuality'></a>
---
### Constants
<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kNone_SkFilterQuality'><code>kNone_SkFilterQuality</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kLow_SkFilterQuality'><code>kLow_SkFilterQuality</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kMedium_SkFilterQuality'><code>kMedium_SkFilterQuality</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kHigh_SkFilterQuality'><code>kHigh_SkFilterQuality</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>3</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='Nearest_Neighbor'></a>
<a name='Bilerp'></a>
<a name='MipMap'></a>
<a name='BiCubic'></a>
<a name='Advance'></a>
<a name='Engine'></a>
<a name='SkTextEncoding'></a>
---
### Constants
<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kUTF8_SkTextEncoding'><code>kUTF8_SkTextEncoding</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kUTF16_SkTextEncoding'><code>kUTF16_SkTextEncoding</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kUTF32_SkTextEncoding'><code>kUTF32_SkTextEncoding</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kGlyphID_SkTextEncoding'><code>kGlyphID_SkTextEncoding</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>3</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='SkFont'></a>
---
<a name='SkFontHinting'></a>
---
### Constants
<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kNo_SkFontHinting'><code>kNo_SkFontHinting</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kSlight_SkFontHinting'><code>kSlight_SkFontHinting</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kNormal_SkFontHinting'><code>kNormal_SkFontHinting</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='kFull_SkFontHinting'><code>kFull_SkFontHinting</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>3</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='SkFontMetrics'></a>
---
<a href='#SkFontMetrics'>SkFontMetrics</a> is filled out by <a href='SkPaint_Reference#SkPaint_getFontMetrics'>SkPaint::getFontMetrics</a>. <a href='#SkFontMetrics'>SkFontMetrics</a> contents
reflect the values
computed by <a href='#Font_Manager'>Font Manager</a> using <a href='#Typeface'>Typeface</a>. Values are set to zero if they are
not available.
All vertical values are relative to the baseline, on a y-axis pointing down.
Zero is on the baseline, negative values are above the baseline, and positive
values are below the baseline.
<a href='#SkFontMetrics_fUnderlineThickness'>fUnderlineThickness</a> and <a href='#SkFontMetrics_fUnderlinePosition'>fUnderlinePosition</a> have a bit set in <a href='#SkFontMetrics_fFlags'>fFlags</a> if their values
are valid, since their value may be zero.
<a href='#SkFontMetrics_fStrikeoutThickness'>fStrikeoutThickness</a> and <a href='#SkFontMetrics_fStrikeoutPosition'>fStrikeoutPosition</a> have a bit set in <a href='#SkFontMetrics_fFlags'>fFlags</a> if their values
are valid, since their value may be zero.
<a name='SkFontMetrics_FontMetricsFlags'></a>
---
<a href='#SkFontMetrics_FontMetricsFlags'>FontMetricsFlags</a> are set in <a href='#SkFontMetrics_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 style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_kUnderlineThicknessIsValid_Flag'><code>SkFontMetrics::kUnderlineThicknessIsValid_Flag</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0x0001</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
set if fUnderlineThickness is valid</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_kUnderlinePositionIsValid_Flag'><code>SkFontMetrics::kUnderlinePositionIsValid_Flag</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0x0002</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
set if fUnderlinePosition is valid</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_kStrikeoutThicknessIsValid_Flag'><code>SkFontMetrics::kStrikeoutThicknessIsValid_Flag</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0x0004</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
set if fStrikeoutThickness is valid</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_kStrikeoutPositionIsValid_Flag'><code>SkFontMetrics::kStrikeoutPositionIsValid_Flag</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0x0008</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
set if fStrikeoutPosition is valid</td>
</tr>
</table><table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Type</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Member</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>uint32_t</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fFlags'><code>fFlags</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
is set to FontMetricsFlags when metrics are valid</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fTop'><code>fTop</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Greatest extent above the baseline for any glyph.
Typically less than zero.
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fAscent'><code>fAscent</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Recommended distance above the baseline to reserve for a line of text.
Typically less than zero.
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fDescent'><code>fDescent</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Recommended distance below the baseline to reserve for a line of text.
Typically greater than zero.
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fBottom'><code>fBottom</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Greatest extent below the baseline for any glyph.
Typically greater than zero.
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fLeading'><code>fLeading</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Recommended distance to add between lines of text.
Typically greater than or equal to zero.
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fAvgCharWidth'><code>fAvgCharWidth</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Average character width, if it is available.
Zero if no average width is stored in the font.
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fMaxCharWidth'><code>fMaxCharWidth</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
maximum character width</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fXMin'><code>fXMin</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Minimum bounding box x-axis value for all <a href='#Glyph'>Glyphs</a>.
Typically less than zero.
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fXMax'><code>fXMax</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Maximum bounding box x-axis value for all <a href='#Glyph'>Glyphs</a>.
Typically greater than zero.
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fXHeight'><code>fXHeight</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
May be zero if no lower-case height is stored in the font.
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fCapHeight'><code>fCapHeight</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
May be zero if no upper-case height is stored in the font.
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fUnderlineThickness'><code>fUnderlineThickness</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
If the metric is valid, the <a href='#SkFontMetrics_kUnderlineThicknessIsValid_Flag'>kUnderlineThicknessIsValid Flag</a> is set in <a href='#SkFontMetrics_fFlags'>fFlags</a>.
If <a href='#SkFontMetrics_kUnderlineThicknessIsValid_Flag'>kUnderlineThicknessIsValid Flag</a> is clear, <a href='#SkFontMetrics_fUnderlineThickness'>fUnderlineThickness</a> is zero.
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fUnderlinePosition'><code>fUnderlinePosition</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Position of the top of the underline stroke relative to the baseline.
Typically positive when valid.
If the metric is valid, the <a href='#SkFontMetrics_kUnderlinePositionIsValid_Flag'>kUnderlinePositionIsValid Flag</a> is set in <a href='#SkFontMetrics_fFlags'>fFlags</a>.
If <a href='#SkFontMetrics_kUnderlinePositionIsValid_Flag'>kUnderlinePositionIsValid Flag</a> is clear, <a href='#SkFontMetrics_fUnderlinePosition'>fUnderlinePosition</a> is zero.
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fStrikeoutThickness'><code>fStrikeoutThickness</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
If the metric is valid, the <a href='#SkFontMetrics_kStrikeoutThicknessIsValid_Flag'>kStrikeoutThicknessIsValid Flag</a> is set in <a href='#SkFontMetrics_fFlags'>fFlags</a>.
If <a href='#SkFontMetrics_kStrikeoutThicknessIsValid_Flag'>kStrikeoutThicknessIsValid Flag</a> is clear, <a href='#SkFontMetrics_fStrikeoutThickness'>fStrikeoutThickness</a> is zero.
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkFontMetrics_fStrikeoutPosition'><code>fStrikeoutPosition</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Position of the bottom of the strikeout stroke relative to the baseline.
Typically negative when valid.
If the metric is valid, the <a href='#SkFontMetrics_kStrikeoutPositionIsValid_Flag'>kStrikeoutPositionIsValid Flag</a> is set in <a href='#SkFontMetrics_fFlags'>fFlags</a>.
If <a href='#SkFontMetrics_kStrikeoutPositionIsValid_Flag'>kStrikeoutPositionIsValid Flag</a> is clear, <a href='#SkFontMetrics_fStrikeoutPosition'>fStrikeoutPosition</a> is zero.
</td>
</tr>
</table>
<a name='SkFontMetrics_hasUnderlineThickness'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#SkFontMetrics_hasUnderlineThickness'>hasUnderlineThickness</a>(<a href='#SkScalar'>SkScalar</a>* thickness) const
</pre>
<a name='SkFontMetrics_hasUnderlinePosition'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#SkFontMetrics_hasUnderlinePosition'>hasUnderlinePosition</a>(<a href='#SkScalar'>SkScalar</a>* position) const
</pre>
<a name='SkFontMetrics_hasStrikeoutThickness'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#SkFontMetrics_hasStrikeoutThickness'>hasStrikeoutThickness</a>(<a href='#SkScalar'>SkScalar</a>* thickness) const
</pre>
<a name='SkFontMetrics_hasStrikeoutPosition'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#SkFontMetrics_hasStrikeoutPosition'>hasStrikeoutPosition</a>(<a href='#SkScalar'>SkScalar</a>* position) const
</pre>
<a name='GrContext'></a>
---
<a name='GrContext_flush'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
void <a href='#GrContext_flush'>flush</a>()
</pre>
<a name='ID'></a>
<a name='ArcTo'></a>
<a name='SkISize'></a>
---
<a name='SkISize_width'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
int32_t <a href='#SkISize_width'>width</a>() const
</pre>
<a name='SkISize_height'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
int32_t <a href='#SkISize_height'>height</a>() const
</pre>
<a name='SkImageFilter'></a>
---
<a name='SkMaskFilter'></a>
---
<a name='SkMetaData'></a>
---
### Constants
<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkPaintDefaults_Flags'><code>SkPaintDefaults_Flags</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkPaintDefaults_Hinting'><code>SkPaintDefaults_Hinting</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkPaintDefaults_TextSize'><code>SkPaintDefaults_TextSize</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>12</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkPaintDefaults_MiterLimit'><code>SkPaintDefaults_MiterLimit</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>4</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<a name='SkPathOp'></a>
---
</table>
<a name='Op'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool SK_API <a href='#Op'>Op</a>(const <a href='SkPath_Reference#SkPath'>SkPath</a>& one, const <a href='SkPath_Reference#SkPath'>SkPath</a>& two, <a href='#SkPathOp'>SkPathOp</a> op, <a href='SkPath_Reference#SkPath'>SkPath</a>* result)
</pre>
<a name='SkPathEffect'></a>
---
<a name='SkPictureRecorder'></a>
---
<a name='SkPictureRecorder_beginRecording'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
<a href='SkCanvas_Reference#SkCanvas'>SkCanvas</a>* <a href='#SkPictureRecorder_beginRecording'>beginRecording</a>(const <a href='SkRect_Reference#SkRect'>SkRect</a>& bounds, <a href='#SkBBHFactory'>SkBBHFactory</a>* bbhFactory = NULL,
uint32_t recordFlags = 0)
</pre>
<a name='Storage'></a>
<a name='SkPixelRef'></a>
---
<a name='SkPixelRef_width'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
int <a href='#SkPixelRef_width'>width</a>() const
</pre>
<a name='SkPixelRef_height'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
int <a href='#SkPixelRef_height'>height</a>() const
</pre>
<a name='SkPixelRef_isImmutable'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#SkPixelRef_isImmutable'>isImmutable</a>() const
</pre>
<a name='SkPixelRef_setImmutable'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
void <a href='#SkPixelRef_setImmutable'>setImmutable</a>()
</pre>
<a name='SkPoint3'></a>
---
<a name='Arct'></a>
<a name='SkRSXform'></a>
---<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Type</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Member</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkRSXform_fSCos'><code>fSCos</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkRSXform_fSSin'><code>fSSin</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkRSXform_fTx'><code>fTx</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkScalar</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkRSXform_fTy'><code>fTy</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='SkRasterHandleAllocator'></a>
---
<a name='SkRasterHandleAllocator_Handle'></a>
---
<a name='SkRasterHandleAllocator_Rec'></a>
---
<a name='SkRasterHandleAllocator_MakeCanvas'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
static std::unique_ptr&lt;<a href='SkCanvas_Reference#SkCanvas'>SkCanvas</a>&gt; <a href='#SkRasterHandleAllocator_MakeCanvas'>MakeCanvas</a>(std::unique_ptr&lt;<a href='#SkRasterHandleAllocator'>SkRasterHandleAllocator</a>&gt;,
const <a href='SkImageInfo_Reference#SkImageInfo'>SkImageInfo</a>&, const <a href='#SkRasterHandleAllocator_Rec'>Rec</a>* rec = nullptr)
</pre>
<a name='SkRefCnt'></a>
---
<a name='GrBackendRenderTarget'></a>
---
<a name='GrBackendRenderTarget_isValid'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#GrBackendRenderTarget_isValid'>isValid</a>() const
</pre>
<a name='GrRenderTarget'></a>
---
<a name='Canvas'></a>
<a name='Arc'></a>
<a name='Sweep_Flag'></a>
<a name='SkScalar'></a>
---
<a name='SkSerialProcs'></a>
---<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Type</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Member</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkSerialPictureProc</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkSerialProcs_fPictureProc'><code>fPictureProc</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>void*</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkSerialProcs_fPictureCtx'><code>fPictureCtx</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>SkSerialTypefaceProc</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkSerialProcs_fTypefaceProc'><code>fTypefaceProc</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>void*</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkSerialProcs_fTypefaceCtx'><code>fTypefaceCtx</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='SkShader'></a>
---
<a name='SkShader_TileMode'></a>
---
### Constants
<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkShader_kClamp_TileMode'><code>SkShader::kClamp_TileMode</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkShader_kRepeat_TileMode'><code>SkShader::kRepeat_TileMode</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>1</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkShader_kMirror_TileMode'><code>SkShader::kMirror_TileMode</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>2</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
<a name='SkShader_MakeBitmapShader'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
static <a href='#sk_sp'>sk sp</a>&lt;<a href='#SkShader'>SkShader</a>&gt; <a href='#SkShader_MakeBitmapShader'>MakeBitmapShader</a>(const <a href='SkBitmap_Reference#SkBitmap'>SkBitmap</a>& src, <a href='#SkShader_TileMode'>TileMode</a> tmx, <a href='#SkShader_TileMode'>TileMode</a> tmy,
const <a href='SkMatrix_Reference#SkMatrix'>SkMatrix</a>* localMatrix = nullptr)
</pre>
<a name='SkShader_MakeCompose'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
static <a href='#sk_sp'>sk sp</a>&lt;<a href='#SkShader'>SkShader</a>&gt; <a href='#SkShader_MakeCompose'>MakeCompose</a>(<a href='#sk_sp'>sk sp</a>&lt;<a href='#SkShader'>SkShader</a>&gt; dst, <a href='#sk_sp'>sk sp</a>&lt;<a href='#SkShader'>SkShader</a>&gt; src, <a href='SkBlendMode_Reference#SkBlendMode'>SkBlendMode</a> mode,
float lerp = 1)
</pre>
<a name='SkSize'></a>
---
<a name='SkSize_width'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
int32_t <a href='#SkSize_width'>width</a>() const
</pre>
<a name='SkSize_height'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
int32_t <a href='#SkSize_height'>height</a>() const
</pre>
<a name='sk_sp'></a>
---
<a name='SkStreamAsset'></a>
---
<a name='SkString'></a>
---
<a name='SkSurfaceCharacterization'></a>
---
<a name='SkSurfaceProps'></a>
---
<a name='Legacy_Font_Host'></a>
<a name='SkSurfaceProps_InitType'></a>
---
### Constants
<table style='border-collapse: collapse; width: 62.5em'>
<tr><th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Const</th>
<th style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>Value</th>
<th style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>Description</th></tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkSurfaceProps_kLegacyFontHost_InitType'><code>SkSurfaceProps::kLegacyFontHost_InitType</code></a></td>
<td style='text-align: center; border: 2px solid #dddddd; padding: 8px; '>0</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
</td>
</tr>
</table>
#
Topic
<a name='GrBackendTexture'></a>
---
<a name='GrBackendTexture_isValid'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
bool <a href='#GrBackendTexture_isValid'>isValid</a>() const
</pre>
<a name='ID'></a>
<a name='SkFontID'></a>
---
<a name='SkTypeface'></a>
---
<a name='SkTypeface_uniqueID'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
<a href='#SkFontID'>SkFontID</a> <a href='#SkTypeface_uniqueID'>uniqueID</a>() const
</pre>
<a name='SkVertices'></a>
---
<a name='SkVertices_Bone'></a>
---
<a name='Colors'></a>
<a name='Texs'></a>
<a name='SkXfermodeImageFilter'></a>
---
<a name='SkYUVAIndex'></a>
---
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