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skia2/site/user/api/SkTextBlobBuilder_Reference.md
Cary Clark 1c23557b6e bookmaker nightly fix 
replace SkPaint::kGlyphID_TextEncoding with kGlyphID_SkTextEncoding

NOTRY=true
TBR=reed@google.com

Docs-Preview: https://skia.org/?cl=175340
Bug: skia:
Change-Id: I5835bf2d45969b727d9c895d34d7adb7c15b251c
Reviewed-on: https://skia-review.googlesource.com/c/175340
Commit-Queue: Cary Clark <caryclark@skia.org>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
2018-12-06 18:03:08 +00:00

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SkTextBlobBuilder Reference
===
<a name='SkTextBlobBuilder'></a>
---
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
class <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a> {
<a href='#SkTextBlobBuilder_empty_constructor'>SkTextBlobBuilder()</a>;
<a href='#SkTextBlobBuilder_destructor'>~SkTextBlobBuilder()</a>;
<a href='undocumented#sk_sp'>sk_sp</a><<a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>> <a href='#SkTextBlobBuilder_make'>make()</a>;
const <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>& <a href='#SkTextBlobBuilder_allocRun'>allocRun</a>(const <a href='SkFont_Reference#SkFont'>SkFont</a>& <a href='SkFont_Reference#Font'>font</a>, int count, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y,
const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds = nullptr);
const <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>& <a href='#SkTextBlobBuilder_allocRunPosH'>allocRunPosH</a>(const <a href='SkFont_Reference#SkFont'>SkFont</a>& <a href='SkFont_Reference#Font'>font</a>, int count, <a href='undocumented#SkScalar'>SkScalar</a> y,
const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds = nullptr);
const <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>& <a href='#SkTextBlobBuilder_allocRunPos'>allocRunPos</a>(const <a href='SkFont_Reference#SkFont'>SkFont</a>& <a href='SkFont_Reference#Font'>font</a>, int count,
const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds = nullptr);
};
</pre>
Helper class for constructing <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>.
<a name='SkTextBlobBuilder_RunBuffer'></a>
---
<pre style="padding: 1em 1em 1em 1em;width: 62.5em; background-color: #f0f0f0">
struct <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a> {
<a href='undocumented#SkGlyphID'>SkGlyphID</a>* <a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a>;
<a href='undocumented#SkScalar'>SkScalar</a>* <a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a>;
char* <a href='#SkTextBlobBuilder_RunBuffer_utf8text'>utf8text</a>;
uint32_t* <a href='#SkTextBlobBuilder_RunBuffer_clusters'>clusters</a>;
};
</pre>
<a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a> supplies storage for <a href='undocumented#Glyph'>Glyphs</a> and positions within a run.
A run is a sequence of <a href='undocumented#Glyph'>Glyphs</a> sharing <a href='#Font_Metrics'>Font_Metrics</a> and positioning.
Each run may position its <a href='undocumented#Glyph'>Glyphs</a> in one of three ways:
by specifying where the first <a href='undocumented#Glyph'>Glyph</a> is drawn, and allowing <a href='#Font_Metrics'>Font_Metrics</a> to
determine the advance to subsequent <a href='undocumented#Glyph'>Glyphs</a>; by specifying a baseline, and
the position on that baseline for each <a href='undocumented#Glyph'>Glyph</a> in run; or by providing <a href='SkPoint_Reference#Point'>Point</a>
array, one per <a href='undocumented#Glyph'>Glyph</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; '>SkGlyphID*</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkTextBlobBuilder_RunBuffer_glyphs'><code>glyphs</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
<a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a> <a href='SkPoint_Reference#Point'>points</a> to memory for one or more <a href='undocumented#Glyph'>Glyphs</a>. <a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a> memory must be
written to by the caller.
</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='SkTextBlobBuilder_RunBuffer_pos'><code>pos</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
<a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a> <a href='SkPoint_Reference#Point'>points</a> to memory for <a href='undocumented#Glyph'>Glyph</a> positions. Depending on how <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>
is allocated, <a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a> may <a href='SkPoint_Reference#Point'>point</a> to zero bytes per <a href='undocumented#Glyph'>Glyph</a>, one <a href='undocumented#Scalar'>Scalar</a> per <a href='undocumented#Glyph'>Glyph</a>,
or one <a href='SkPoint_Reference#Point'>Point</a> per <a href='undocumented#Glyph'>Glyph</a>.
</td>
</tr>
<tr style='background-color: #f0f0f0; '>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>char*</td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '><a name='SkTextBlobBuilder_RunBuffer_utf8text'><code>utf8text</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Reserved for future use. <a href='#SkTextBlobBuilder_RunBuffer_utf8text'>utf8text</a> should not be read or written.
</td>
</tr>
<tr>
<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='SkTextBlobBuilder_RunBuffer_clusters'><code>clusters</code></a></td>
<td style='text-align: left; border: 2px solid #dddddd; padding: 8px; '>
Reserved for future use. <a href='#SkTextBlobBuilder_RunBuffer_clusters'>clusters</a> should not be read or written.
</td>
</tr>
</table>
### See Also
<a href='#SkTextBlobBuilder_allocRun'>allocRun</a> <a href='#SkTextBlobBuilder_allocRunPos'>allocRunPos</a> <a href='#SkTextBlobBuilder_allocRunPosH'>allocRunPosH</a>
<a name='SkTextBlobBuilder_empty_constructor'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
<a href='#SkTextBlobBuilder_empty_constructor'>SkTextBlobBuilder()</a>
</pre>
Constructs empty <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a>. By default, <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a> has no runs.
### Return Value
empty <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a>
### Example
<div><fiddle-embed name="d9dbabfe24aad92ee3c8144513e90d81">
#### Example Output
~~~~
blob equals nullptr
~~~~
</fiddle-embed></div>
### See Also
<a href='#SkTextBlobBuilder_make'>make</a> <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>::<a href='#SkTextBlob_MakeFromText'>MakeFromText</a>
<a name='SkTextBlobBuilder_destructor'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
<a href='#SkTextBlobBuilder_destructor'>~SkTextBlobBuilder()</a>
</pre>
Deletes <a href='undocumented#Data'>data</a> allocated internally by <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a>.
### See Also
<a href='#SkTextBlobBuilder_empty_constructor'>SkTextBlobBuilder()</a>
<a name='SkTextBlobBuilder_make'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
<a href='undocumented#sk_sp'>sk_sp</a>&lt;<a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>&gt; <a href='#SkTextBlobBuilder_make'>make()</a>
</pre>
Returns <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a> built from runs of <a href='undocumented#Glyph'>glyphs</a> added by builder. Returned
<a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a> is immutable; it may be copied, but its contents may not be altered.
Returns nullptr if no runs of <a href='undocumented#Glyph'>glyphs</a> were added by builder.
Resets <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a> to its initial empty state, allowing it to be
reused to build a new set of runs.
### Return Value
<a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a> or nullptr
### Example
<div><fiddle-embed name="34c37c0212cc0aef670d96945d08fe24">
#### Example Output
~~~~
blob equals nullptr
blob does not equal nullptr
blob equals nullptr
~~~~
</fiddle-embed></div>
### See Also
<a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>::<a href='#SkTextBlob_MakeFromText'>MakeFromText</a>
<a name='SkTextBlobBuilder_allocRun'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
const <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>& <a href='#SkTextBlobBuilder_allocRun'>allocRun</a>(const <a href='SkFont_Reference#SkFont'>SkFont</a>& <a href='SkFont_Reference#Font'>font</a>, int count, <a href='undocumented#SkScalar'>SkScalar</a> x, <a href='undocumented#SkScalar'>SkScalar</a> y,
const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds = nullptr)
</pre>
Returns run with storage for <a href='undocumented#Glyph'>glyphs</a>. Caller must write <a href='#SkTextBlobBuilder_allocRun_count'>count</a> <a href='undocumented#Glyph'>glyphs</a> to
<a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a> before next call to <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a>.
<a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_utf8text'>utf8text</a>, and <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_clusters'>clusters</a> should be ignored.
<a href='undocumented#Glyph'>Glyphs</a> share metrics in <a href='#SkTextBlobBuilder_allocRun_font'>font</a>.
<a href='undocumented#Glyph'>Glyphs</a> are positioned on a baseline at (<a href='#SkTextBlobBuilder_allocRun_x'>x</a>, <a href='#SkTextBlobBuilder_allocRun_y'>y</a>), using <a href='undocumented#Font_Metrics'>font metrics</a> to
determine their relative placement.
<a href='#SkTextBlobBuilder_allocRun_bounds'>bounds</a> defines an optional bounding box, used to suppress drawing when <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>
<a href='#SkTextBlobBuilder_allocRun_bounds'>bounds</a> does not intersect <a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='#SkTextBlobBuilder_allocRun_bounds'>bounds</a>. If <a href='#SkTextBlobBuilder_allocRun_bounds'>bounds</a> is nullptr, <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a> <a href='#SkTextBlobBuilder_allocRun_bounds'>bounds</a>
is computed from (<a href='#SkTextBlobBuilder_allocRun_x'>x</a>, <a href='#SkTextBlobBuilder_allocRun_y'>y</a>) and <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a> metrics.
### Parameters
<table> <tr> <td><a name='SkTextBlobBuilder_allocRun_font'><code><strong>font</strong></code></a></td>
<td><a href='SkFont_Reference#SkFont'>SkFont</a> used for this run</td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRun_count'><code><strong>count</strong></code></a></td>
<td>number of <a href='undocumented#Glyph'>glyphs</a></td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRun_x'><code><strong>x</strong></code></a></td>
<td>horizontal offset within the blob</td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRun_y'><code><strong>y</strong></code></a></td>
<td>vertical offset within the blob</td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRun_bounds'><code><strong>bounds</strong></code></a></td>
<td>optional run bounding box</td>
</tr>
</table>
### Return Value
writable <a href='undocumented#Glyph'>glyph</a> buffer
### Example
<div><fiddle-embed name="f0e584aec20eaee7a5bfed62aa885eee"></fiddle-embed></div>
### See Also
<a href='#SkTextBlobBuilder_allocRunPosH'>allocRunPosH</a> <a href='#SkTextBlobBuilder_allocRunPos'>allocRunPos</a>
<a name='SkTextBlobBuilder_allocRunPosH'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
const <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>& <a href='#SkTextBlobBuilder_allocRunPosH'>allocRunPosH</a>(const <a href='SkFont_Reference#SkFont'>SkFont</a>& <a href='SkFont_Reference#Font'>font</a>, int count, <a href='undocumented#SkScalar'>SkScalar</a> y,
const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds = nullptr)
</pre>
Returns run with storage for <a href='undocumented#Glyph'>glyphs</a> and positions along baseline. Caller must
write <a href='#SkTextBlobBuilder_allocRunPosH_count'>count</a> <a href='undocumented#Glyph'>glyphs</a> to <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a>, and <a href='#SkTextBlobBuilder_allocRunPosH_count'>count</a> <a href='undocumented#Scalar'>scalars</a> to <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a>;
before next call to <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a>.
<a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_utf8text'>utf8text</a>, and <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_clusters'>clusters</a> should be ignored.
<a href='undocumented#Glyph'>Glyphs</a> share metrics in <a href='#SkTextBlobBuilder_allocRunPosH_font'>font</a>.
<a href='undocumented#Glyph'>Glyphs</a> are positioned on a baseline at <a href='#SkTextBlobBuilder_allocRunPosH_y'>y</a>, using x-axis positions written by
caller to <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a>.
<a href='#SkTextBlobBuilder_allocRunPosH_bounds'>bounds</a> defines an optional bounding box, used to suppress drawing when <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>
<a href='#SkTextBlobBuilder_allocRunPosH_bounds'>bounds</a> does not intersect <a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='#SkTextBlobBuilder_allocRunPosH_bounds'>bounds</a>. If <a href='#SkTextBlobBuilder_allocRunPosH_bounds'>bounds</a> is nullptr, <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a> <a href='#SkTextBlobBuilder_allocRunPosH_bounds'>bounds</a>
is computed from <a href='#SkTextBlobBuilder_allocRunPosH_y'>y</a>, <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a>, and <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a> metrics.
### Parameters
<table> <tr> <td><a name='SkTextBlobBuilder_allocRunPosH_font'><code><strong>font</strong></code></a></td>
<td><a href='SkFont_Reference#SkFont'>SkFont</a> used for this run</td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRunPosH_count'><code><strong>count</strong></code></a></td>
<td>number of <a href='undocumented#Glyph'>glyphs</a></td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRunPosH_y'><code><strong>y</strong></code></a></td>
<td>vertical offset within the blob</td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRunPosH_bounds'><code><strong>bounds</strong></code></a></td>
<td>optional run bounding box</td>
</tr>
</table>
### Return Value
writable <a href='undocumented#Glyph'>glyph</a> buffer and x-axis position buffer
### Example
<div><fiddle-embed name="c77ac50f506106fdfef94d20bc1a6934"></fiddle-embed></div>
### See Also
<a href='#SkTextBlobBuilder_allocRunPos'>allocRunPos</a> <a href='#SkTextBlobBuilder_allocRun'>allocRun</a>
<a name='SkTextBlobBuilder_allocRunPos'></a>
---
<pre style="padding: 1em 1em 1em 1em; width: 62.5em;background-color: #f0f0f0">
const <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>& <a href='#SkTextBlobBuilder_allocRunPos'>allocRunPos</a>(const <a href='SkFont_Reference#SkFont'>SkFont</a>& <a href='SkFont_Reference#Font'>font</a>, int count, const <a href='SkRect_Reference#SkRect'>SkRect</a>* bounds = nullptr)
</pre>
Returns run with storage for <a href='undocumented#Glyph'>glyphs</a> and <a href='SkPoint_Reference#SkPoint'>SkPoint</a> positions. Caller must
write <a href='#SkTextBlobBuilder_allocRunPos_count'>count</a> <a href='undocumented#Glyph'>glyphs</a> to <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a>, and <a href='#SkTextBlobBuilder_allocRunPos_count'>count</a> <a href='SkPoint_Reference#SkPoint'>SkPoint</a> to <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a>;
before next call to <a href='SkTextBlobBuilder_Reference#SkTextBlobBuilder'>SkTextBlobBuilder</a>.
<a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_utf8text'>utf8text</a>, and <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_clusters'>clusters</a> should be ignored.
<a href='undocumented#Glyph'>Glyphs</a> share metrics in <a href='#SkTextBlobBuilder_allocRunPos_font'>font</a>.
<a href='undocumented#Glyph'>Glyphs</a> are positioned using <a href='SkPoint_Reference#SkPoint'>SkPoint</a> written by caller to <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a>, using
two <a href='undocumented#Scalar'>scalar</a> values for each <a href='SkPoint_Reference#SkPoint'>SkPoint</a>.
<a href='#SkTextBlobBuilder_allocRunPos_bounds'>bounds</a> defines an optional bounding box, used to suppress drawing when <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a>
<a href='#SkTextBlobBuilder_allocRunPos_bounds'>bounds</a> does not intersect <a href='SkSurface_Reference#SkSurface'>SkSurface</a> <a href='#SkTextBlobBuilder_allocRunPos_bounds'>bounds</a>. If <a href='#SkTextBlobBuilder_allocRunPos_bounds'>bounds</a> is nullptr, <a href='SkTextBlob_Reference#SkTextBlob'>SkTextBlob</a> <a href='#SkTextBlobBuilder_allocRunPos_bounds'>bounds</a>
is computed from <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_pos'>pos</a>, and <a href='#SkTextBlobBuilder_RunBuffer'>RunBuffer</a>::<a href='#SkTextBlobBuilder_RunBuffer_glyphs'>glyphs</a> metrics.
### Parameters
<table> <tr> <td><a name='SkTextBlobBuilder_allocRunPos_font'><code><strong>font</strong></code></a></td>
<td><a href='SkFont_Reference#SkFont'>SkFont</a> used for this run</td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRunPos_count'><code><strong>count</strong></code></a></td>
<td>number of <a href='undocumented#Glyph'>glyphs</a></td>
</tr>
<tr> <td><a name='SkTextBlobBuilder_allocRunPos_bounds'><code><strong>bounds</strong></code></a></td>
<td>optional run bounding box</td>
</tr>
</table>
### Return Value
writable <a href='undocumented#Glyph'>glyph</a> buffer and <a href='SkPoint_Reference#SkPoint'>SkPoint</a> buffer
### Example
<div><fiddle-embed name="da4fcb4a972b500996be9aff6c6c40e1"></fiddle-embed></div>
### See Also
<a href='#SkTextBlobBuilder_allocRunPosH'>allocRunPosH</a> <a href='#SkTextBlobBuilder_allocRun'>allocRun</a>
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