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/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-ot-color.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>hb-ot-color: HarfBuzz Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="HarfBuzz Manual"> <link rel="up" href="ch13.html" title="OpenType API"> <link rel="prev" href="ch13.html" title="OpenType API"> <link rel="next" href="harfbuzz-hb-ot-font.html" title="hb-ot-font"> <meta name="generator" content="GTK-Doc V1.32 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#harfbuzz-hb-ot-color.description" class="shortcut">Description</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="ch13.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="ch13.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="harfbuzz-hb-ot-font.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="harfbuzz-hb-ot-color"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="harfbuzz-hb-ot-color.top_of_page"></a>hb-ot-color</span></h2> <p>hb-ot-color — OpenType Color Fonts</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="harfbuzz-hb-ot-color.functions"></a><h2>Functions</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="functions_proto_type"> <col class="functions_proto_name"> </colgroup> <tbody> <tr> <td class="define_keyword">#define</td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#HB-COLOR:CAPS" title="HB_COLOR()">HB_COLOR</a><span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">uint8_t</span> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-color-get-alpha" title="hb_color_get_alpha ()">hb_color_get_alpha</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">uint8_t</span> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-color-get-blue" title="hb_color_get_blue ()">hb_color_get_blue</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">uint8_t</span> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-color-get-green" title="hb_color_get_green ()">hb_color_get_green</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">uint8_t</span> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-color-get-red" title="hb_color_get_red ()">hb_color_get_red</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">unsigned <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-glyph-get-layers" title="hb_ot_color_glyph_get_layers ()">hb_ot_color_glyph_get_layers</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-blob.html#hb-blob-t" title="hb_blob_t"><span class="returnvalue">hb_blob_t</span></a> * </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-glyph-reference-png" title="hb_ot_color_glyph_reference_png ()">hb_ot_color_glyph_reference_png</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-blob.html#hb-blob-t" title="hb_blob_t"><span class="returnvalue">hb_blob_t</span></a> * </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-glyph-reference-svg" title="hb_ot_color_glyph_reference_svg ()">hb_ot_color_glyph_reference_svg</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-has-layers" title="hb_ot_color_has_layers ()">hb_ot_color_has_layers</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-has-palettes" title="hb_ot_color_has_palettes ()">hb_ot_color_has_palettes</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-has-png" title="hb_ot_color_has_png ()">hb_ot_color_has_png</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-has-svg" title="hb_ot_color_has_svg ()">hb_ot_color_has_svg</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="returnvalue">hb_ot_name_id_t</span></a> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-color-get-name-id" title="hb_ot_color_palette_color_get_name_id ()">hb_ot_color_palette_color_get_name_id</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">unsigned <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-get-colors" title="hb_ot_color_palette_get_colors ()">hb_ot_color_palette_get_colors</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type">unsigned <span class="returnvalue">int</span> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-get-count" title="hb_ot_color_palette_get_count ()">hb_ot_color_palette_get_count</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-flags-t" title="enum hb_ot_color_palette_flags_t"><span class="returnvalue">hb_ot_color_palette_flags_t</span></a> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-get-flags" title="hb_ot_color_palette_get_flags ()">hb_ot_color_palette_get_flags</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="returnvalue">hb_ot_name_id_t</span></a> </td> <td class="function_name"> <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-get-name-id" title="hb_ot_color_palette_get_name_id ()">hb_ot_color_palette_get_name_id</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-color.other"></a><h2>Types and Values</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="other_proto_type"> <col class="other_proto_name"> </colgroup> <tbody> <tr> <td class="typedef_keyword">typedef</td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-color.html#hb-color-t" title="hb_color_t">hb_color_t</a></td> </tr> <tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-layer-t" title="hb_ot_color_layer_t">hb_ot_color_layer_t</a></td> </tr> <tr> <td class="datatype_keyword">enum</td> <td class="function_name"><a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-flags-t" title="enum hb_ot_color_palette_flags_t">hb_ot_color_palette_flags_t</a></td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-color.includes"></a><h2>Includes</h2> <pre class="synopsis">#include <hb-ot.h> </pre> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-color.description"></a><h2>Description</h2> <p>Functions for fetching color-font information from OpenType font faces.</p> <p>HarfBuzz supports <code class="literal">COLR</code>/<code class="literal">CPAL</code>, <code class="literal">sbix</code>, <code class="literal">CBDT</code>, and <code class="literal">SVG</code> color fonts.</p> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-color.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="HB-COLOR:CAPS"></a><h3>HB_COLOR()</h3> <pre class="programlisting">#define HB_COLOR(b,g,r,a) ((hb_color_t) HB_TAG ((b),(g),(r),(a))) </pre> </div> <hr> <div class="refsect2"> <a name="hb-color-get-alpha"></a><h3>hb_color_get_alpha ()</h3> <pre class="programlisting"><span class="returnvalue">uint8_t</span> hb_color_get_alpha (<em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-color.html#hb-color-t" title="hb_color_t"><span class="type">hb_color_t</span></a> color</code></em>);</pre> <div class="refsect3"> <a name="hb-color-get-alpha.returns"></a><h4>Returns</h4> <p> Alpha channel value of the given color</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-color-get-blue"></a><h3>hb_color_get_blue ()</h3> <pre class="programlisting"><span class="returnvalue">uint8_t</span> hb_color_get_blue (<em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-color.html#hb-color-t" title="hb_color_t"><span class="type">hb_color_t</span></a> color</code></em>);</pre> <div class="refsect3"> <a name="hb-color-get-blue.returns"></a><h4>Returns</h4> <p> Blue channel value of the given color</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-color-get-green"></a><h3>hb_color_get_green ()</h3> <pre class="programlisting"><span class="returnvalue">uint8_t</span> hb_color_get_green (<em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-color.html#hb-color-t" title="hb_color_t"><span class="type">hb_color_t</span></a> color</code></em>);</pre> <div class="refsect3"> <a name="hb-color-get-green.returns"></a><h4>Returns</h4> <p> Green channel value of the given color</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-color-get-red"></a><h3>hb_color_get_red ()</h3> <pre class="programlisting"><span class="returnvalue">uint8_t</span> hb_color_get_red (<em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-color.html#hb-color-t" title="hb_color_t"><span class="type">hb_color_t</span></a> color</code></em>);</pre> <div class="refsect3"> <a name="hb-color-get-red.returns"></a><h4>Returns</h4> <p> Red channel value of the given color</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-glyph-get-layers"></a><h3>hb_ot_color_glyph_get_layers ()</h3> <pre class="programlisting">unsigned <span class="returnvalue">int</span> hb_ot_color_glyph_get_layers (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> start_offset</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> *layer_count</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-layer-t" title="hb_ot_color_layer_t"><span class="type">hb_ot_color_layer_t</span></a> *layers</code></em>);</pre> <p>Fetches a list of all color layers for the specified glyph index in the specified face. The list returned will begin at the offset provided.</p> <div class="refsect3"> <a name="hb-ot-color-glyph-get-layers.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>The glyph index to query</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>start_offset</p></td> <td class="parameter_description"><p>offset of the first layer to retrieve</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>layer_count</p></td> <td class="parameter_description"><p>Input = the maximum number of layers to return; Output = the actual number of layers returned (may be zero). </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input and for returning results. Default is transfer full."><span class="acronym">inout</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td> </tr> <tr> <td class="parameter_name"><p>layers</p></td> <td class="parameter_description"><p>The array of layers found. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=layer_count][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-glyph-get-layers.returns"></a><h4>Returns</h4> <p> Total number of layers available for the glyph index queried</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-glyph-reference-png"></a><h3>hb_ot_color_glyph_reference_png ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-blob.html#hb-blob-t" title="hb_blob_t"><span class="returnvalue">hb_blob_t</span></a> * hb_ot_color_glyph_reference_png (<em class="parameter"><code><a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> *font</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>);</pre> <p>Fetches the PNG image for a glyph. This function takes a font object, not a face object, as input. To get an optimally sized PNG blob, the UPEM value must be set on the <em class="parameter"><code>font</code></em> object. If UPEM is unset, the blob returned will be the largest PNG available.</p> <div class="refsect3"> <a name="hb-ot-color-glyph-reference-png.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>font</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-font.html#hb-font-t" title="hb_font_t"><span class="type">hb_font_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>a glyph index</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-glyph-reference-png.returns"></a><h4>Returns</h4> <p>An <a class="link" href="harfbuzz-hb-blob.html#hb-blob-t" title="hb_blob_t"><span class="type">hb_blob_t</span></a> containing the PNG image for the glyph, if available. </p> <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-glyph-reference-svg"></a><h3>hb_ot_color_glyph_reference_svg ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-blob.html#hb-blob-t" title="hb_blob_t"><span class="returnvalue">hb_blob_t</span></a> * hb_ot_color_glyph_reference_svg (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-common.html#hb-codepoint-t" title="hb_codepoint_t"><span class="type">hb_codepoint_t</span></a> glyph</code></em>);</pre> <p>Fetches the SVG document for a glyph. The blob may be either plain text or gzip-encoded.</p> <div class="refsect3"> <a name="hb-ot-color-glyph-reference-svg.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>glyph</p></td> <td class="parameter_description"><p>a svg glyph index</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-glyph-reference-svg.returns"></a><h4>Returns</h4> <p>An <a class="link" href="harfbuzz-hb-blob.html#hb-blob-t" title="hb_blob_t"><span class="type">hb_blob_t</span></a> containing the SVG document of the glyph, if available. </p> <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-has-layers"></a><h3>hb_ot_color_has_layers ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> hb_ot_color_has_layers (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>);</pre> <p>Tests whether a face includes any <code class="literal">COLR</code> color layers.</p> <div class="refsect3"> <a name="hb-ot-color-has-layers.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-has-layers.returns"></a><h4>Returns</h4> <p> true if data found, false otherwise</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-has-palettes"></a><h3>hb_ot_color_has_palettes ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> hb_ot_color_has_palettes (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>);</pre> <p>Tests whether a face includes a <code class="literal">CPAL</code> color-palette table.</p> <div class="refsect3"> <a name="hb-ot-color-has-palettes.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-has-palettes.returns"></a><h4>Returns</h4> <p> true if data found, false otherwise</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-has-png"></a><h3>hb_ot_color_has_png ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> hb_ot_color_has_png (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>);</pre> <p>Tests whether a face has PNG glyph images (either in <code class="literal">CBDT</code> or <code class="literal">sbix</code> tables).</p> <div class="refsect3"> <a name="hb-ot-color-has-png.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-has-png.returns"></a><h4>Returns</h4> <p> true if data found, false otherwise</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-has-svg"></a><h3>hb_ot_color_has_svg ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-common.html#hb-bool-t" title="hb_bool_t"><span class="returnvalue">hb_bool_t</span></a> hb_ot_color_has_svg (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>);</pre> <p>Tests whether a face includes any <code class="literal">SVG</code> glyph images.</p> <div class="refsect3"> <a name="hb-ot-color-has-svg.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon.</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-has-svg.returns"></a><h4>Returns</h4> <p> true if data found, false otherwise.</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-palette-color-get-name-id"></a><h3>hb_ot_color_palette_color_get_name_id ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="returnvalue">hb_ot_name_id_t</span></a> hb_ot_color_palette_color_get_name_id (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> color_index</code></em>);</pre> <p>Fetches the <code class="literal">name</code> table Name ID that provides display names for the specificed color in a face's <code class="literal">CPAL</code> color palette. </p> <p>Display names can be generic (e.g., "Background") or specific (e.g., "Eye color").</p> <div class="refsect3"> <a name="hb-ot-color-palette-color-get-name-id.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>color_index</p></td> <td class="parameter_description"><p>The index of the color</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-palette-color-get-name-id.returns"></a><h4>Returns</h4> <p> the Name ID found for the color.</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-palette-get-colors"></a><h3>hb_ot_color_palette_get_colors ()</h3> <pre class="programlisting">unsigned <span class="returnvalue">int</span> hb_ot_color_palette_get_colors (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> palette_index</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> start_offset</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> *color_count</code></em>, <em class="parameter"><code><a class="link" href="harfbuzz-hb-ot-color.html#hb-color-t" title="hb_color_t"><span class="type">hb_color_t</span></a> *colors</code></em>);</pre> <p>Fetches a list of the colors in a color palette.</p> <p>After calling this function, <em class="parameter"><code>colors</code></em> will be filled with the palette colors. If <em class="parameter"><code>colors</code></em> is NULL, the function will just return the number of total colors without storing any actual colors; this can be used for allocating a buffer of suitable size before calling <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-get-colors" title="hb_ot_color_palette_get_colors ()"><code class="function">hb_ot_color_palette_get_colors()</code></a> a second time.</p> <div class="refsect3"> <a name="hb-ot-color-palette-get-colors.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>palette_index</p></td> <td class="parameter_description"><p>the index of the color palette to query</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>start_offset</p></td> <td class="parameter_description"><p>offset of the first color to retrieve</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>color_count</p></td> <td class="parameter_description"><p>Input = the maximum number of colors to return; Output = the actual number of colors returned (may be zero). </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input and for returning results. Default is transfer full."><span class="acronym">inout</span></acronym>][<acronym title="NULL may be passed instead of a pointer to a location."><span class="acronym">optional</span></acronym>]</span></td> </tr> <tr> <td class="parameter_name"><p>colors</p></td> <td class="parameter_description"><p>The array of <a class="link" href="harfbuzz-hb-ot-color.html#hb-color-t" title="hb_color_t"><span class="type">hb_color_t</span></a> records found. </p></td> <td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=color_count][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-palette-get-colors.returns"></a><h4>Returns</h4> <p> the total number of colors in the palette</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-palette-get-count"></a><h3>hb_ot_color_palette_get_count ()</h3> <pre class="programlisting">unsigned <span class="returnvalue">int</span> hb_ot_color_palette_get_count (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>);</pre> <p>Fetches the number of color palettes in a face.</p> <div class="refsect3"> <a name="hb-ot-color-palette-get-count.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-palette-get-count.returns"></a><h4>Returns</h4> <p> the number of palettes found</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-palette-get-flags"></a><h3>hb_ot_color_palette_get_flags ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-flags-t" title="enum hb_ot_color_palette_flags_t"><span class="returnvalue">hb_ot_color_palette_flags_t</span></a> hb_ot_color_palette_get_flags (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> palette_index</code></em>);</pre> <p>Fetches the flags defined for a color palette.</p> <div class="refsect3"> <a name="hb-ot-color-palette-get-flags.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>palette_index</p></td> <td class="parameter_description"><p>The index of the color palette</p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-palette-get-flags.returns"></a><h4>Returns</h4> <p> the <a class="link" href="harfbuzz-hb-ot-color.html#hb-ot-color-palette-flags-t" title="enum hb_ot_color_palette_flags_t"><span class="type">hb_ot_color_palette_flags_t</span></a> of the requested color palette</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-palette-get-name-id"></a><h3>hb_ot_color_palette_get_name_id ()</h3> <pre class="programlisting"><a class="link" href="harfbuzz-hb-ot-name.html#hb-ot-name-id-t" title="hb_ot_name_id_t"><span class="returnvalue">hb_ot_name_id_t</span></a> hb_ot_color_palette_get_name_id (<em class="parameter"><code><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> *face</code></em>, <em class="parameter"><code>unsigned <span class="type">int</span> palette_index</code></em>);</pre> <p>Fetches the <code class="literal">name</code> table Name ID that provides display names for a <code class="literal">CPAL</code> color palette. </p> <p>Palette display names can be generic (e.g., "Default") or provide specific, themed names (e.g., "Spring", "Summer", "Fall", and "Winter").</p> <div class="refsect3"> <a name="hb-ot-color-palette-get-name-id.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody> <tr> <td class="parameter_name"><p>face</p></td> <td class="parameter_description"><p><a class="link" href="harfbuzz-hb-face.html#hb-face-t" title="hb_face_t"><span class="type">hb_face_t</span></a> to work upon</p></td> <td class="parameter_annotations"> </td> </tr> <tr> <td class="parameter_name"><p>palette_index</p></td> <td class="parameter_description"><p>The index of the color palette </p></td> <td class="parameter_annotations"> </td> </tr> </tbody> </table></div> </div> <div class="refsect3"> <a name="hb-ot-color-palette-get-name-id.returns"></a><h4>Returns</h4> <p> the Named ID found for the palette. If the requested palette has no name the result is <span class="type">HB_OT_NAME_ID_INVALID</span>.</p> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> </div> <div class="refsect1"> <a name="harfbuzz-hb-ot-color.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="hb-color-t"></a><h3>hb_color_t</h3> <pre class="programlisting">typedef uint32_t hb_color_t; </pre> <p>Data type for holding color values. Colors are eight bits per channel RGB plus alpha transparency.</p> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-layer-t"></a><h3>hb_ot_color_layer_t</h3> <pre class="programlisting">typedef struct { hb_codepoint_t glyph; unsigned int color_index; } hb_ot_color_layer_t; </pre> <p>Pairs of glyph and color index.</p> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> <hr> <div class="refsect2"> <a name="hb-ot-color-palette-flags-t"></a><h3>enum hb_ot_color_palette_flags_t</h3> <div class="refsect3"> <a name="hb-ot-color-palette-flags-t.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="enum_members_name"> <col class="enum_members_description"> <col width="200px" class="enum_members_annotations"> </colgroup> <tbody> <tr> <td class="enum_member_name"><p><a name="HB-OT-COLOR-PALETTE-FLAG-DEFAULT:CAPS"></a>HB_OT_COLOR_PALETTE_FLAG_DEFAULT</p></td> <td class="enum_member_description"> <p>Default indicating that there is nothing special to note about a color palette.</p> </td> <td class="enum_member_annotations"> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-COLOR-PALETTE-FLAG-USABLE-WITH-LIGHT-BACKGROUND:CAPS"></a>HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_LIGHT_BACKGROUND</p></td> <td class="enum_member_description"> <p>Flag indicating that the color palette is appropriate to use when displaying the font on a light background such as white.</p> </td> <td class="enum_member_annotations"> </td> </tr> <tr> <td class="enum_member_name"><p><a name="HB-OT-COLOR-PALETTE-FLAG-USABLE-WITH-DARK-BACKGROUND:CAPS"></a>HB_OT_COLOR_PALETTE_FLAG_USABLE_WITH_DARK_BACKGROUND</p></td> <td class="enum_member_description"> <p>Flag indicating that the color palette is appropriate to use when displaying the font on a dark background such as black.</p> </td> <td class="enum_member_annotations"> </td> </tr> </tbody> </table></div> </div> <p class="since">Since: <a class="link" href="api-index-2-1-0.html#api-index-2.1.0">2.1.0</a></p> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>
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