third_party/freetype2/src/docs/reference/ft2-quick_advance.html - Issue 1524973002: Update freetype sources (2.6.2) in third party.

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Issue 1524973002: Update freetype sources (2.6.2) in third party. (Closed) Base URL: https://github.com/domokit/mojo.git@master

Patch Set: Created 5 years ago

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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"

+"http://www.w3.org/TR/html4/loose.dtd">

+<html>

+<head>

+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

+<title>FreeType-2.6.2 API Reference</title>

+<style type="text/css">

+ a:link { color: #0000EF; }

+ a:visited { color: #51188E; }

+ a:hover { color: #FF0000; }

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+ padding: 2ex 0 2ex 1%; }

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+ margin: 1.5ex 0 1.5ex 10%; }

+ div.section table.toc { width: 95%;

+ margin: 1.5ex 0 1.5ex 5%; }

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+ font-size: 69%;

+ margin: 1.5ex 0 1.5ex 0; }

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+ margin: 4ex 0 1.5ex 0; }

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+ pre.colored { color: blue; }

+ span.keyword { font-family: monospace;

+ text-align: left;

+ white-space: pre;

+ color: darkblue; }

+ table.fields td.val { font-weight: bold;

+ text-align: right;

+ width: 30%;

+ vertical-align: baseline;

+ padding: 1ex 1em 1ex 0; }

+ table.fields td.desc { vertical-align: baseline;

+ padding: 1ex 0 1ex 1em; }

+ table.fields td.desc p:first-child { margin: 0; }

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+ font-size: 83%;

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+ font-size: 83%;

+ text-align: right; }

+ table.synopsis { margin: 6ex auto 6ex auto;

+ border: 0;

+ border-collapse: separate;

+ border-spacing: 2em 0.6ex; }

+ table.synopsis tr { padding: 0; }

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+ table.toc td.link { width: 30%;

+ text-align: right;

+ vertical-align: baseline;

+ padding: 1ex 1em 1ex 0; }

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+ table.toc td.desc p:first-child { margin: 0;

+ text-align: left; }

+ table.toc td.desc p { margin: 1.5ex 0 0 0;

+ text-align: left; }

+</style>

+</head>

+<body>

+<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table>

+<h1>FreeType-2.6.2 API Reference</h1>

+<h1 id="quick_advance">Quick retrieval of advance values</h1>

+<h2>Synopsis</h2>

+<table class="synopsis">

+<tr><td><a href="#FT_Get_Advance">FT_Get_Advance</a></td><td> </td></tr>

+<tr><td><a href="#FT_Get_Advances">FT_Get_Advances</a></td><td><a href="#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a></td></tr>

+</table>

+<p>This section contains functions to quickly extract advance values without handling glyph outlines, if possible.</p>

+<div class="section">

+<h3 id="FT_Get_Advance">FT_Get_Advance</h3>

+<p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p>

+<pre>

+ FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )

+ <b>FT_Get_Advance</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,

+ <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> gindex,

+ <a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags,

+ <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *padvance );

+</pre>

+<p>Retrieve the advance value of a given glyph outline in an <a href="ft2-base_interface.html#FT_Face">FT_Face</a>.</p>

+<h4>input</h4>

+<table class="fields">

+<tr><td class="val" id="face">face</td><td class="desc">

+<p>The source <a href="ft2-base_interface.html#FT_Face">FT_Face</a> handle.</p>

+</td></tr>

+<tr><td class="val" id="gindex">gindex</td><td class="desc">

+<p>The glyph index.</p>

+</td></tr>

+<tr><td class="val" id="load_flags">load_flags</td><td class="desc">

+<p>A set of bit flags similar to those used when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>, used to determine what kind of advances you need.</p>

+</td></tr>

+</table>

+<h4>output</h4>

+<table class="fields">

+<tr><td class="val" id="padvance">padvance</td><td class="desc">

+<p>The advance value. If scaling is performed (based on the value of ‘load_flags’), the advance value is in 16.16 format. Otherwise, it is in font units.</p>

+<p>If <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a> is set, this is the vertical advance corresponding to a vertical layout. Otherwise, it is the horizontal advance in a horizontal layout.</p>

+</td></tr>

+</table>

+<h4>return</h4>

+<p>FreeType error code. 0 means success.</p>

+<h4>note</h4>

+<p>This function may fail if you use <a href="ft2-quick_advance.html#FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</a> and if the corresponding font backend doesn't have a quick way to retrieve the advances.</p>

+<p>A scaled advance is returned in 16.16 format but isn't transformed by the affine transformation specified by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a>.</p>

+<hr>

+<table class="index-toc-link"><tr><td class="left">[<a href="ft2-index.html">Index</a>]</td><td class="middle">[<a href="#">Top</a>]</td><td class="right">[<a href="ft2-toc.html">TOC</a>]</td></tr></table></div>

+<div class="section">

+<h3 id="FT_Get_Advances">FT_Get_Advances</h3>

+<p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p>

+<pre>

+ FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> )

+ <b>FT_Get_Advances</b>( <a href="ft2-base_interface.html#FT_Face">FT_Face</a> face,

+ <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> start,

+ <a href="ft2-basic_types.html#FT_UInt">FT_UInt</a> count,

+ <a href="ft2-basic_types.html#FT_Int32">FT_Int32</a> load_flags,

+ <a href="ft2-basic_types.html#FT_Fixed">FT_Fixed</a> *padvances );

+</pre>

+<p>Retrieve the advance values of several glyph outlines in an <a href="ft2-base_interface.html#FT_Face">FT_Face</a>.</p>

+<h4>input</h4>

+<table class="fields">

+<tr><td class="val" id="face">face</td><td class="desc">

+<p>The source <a href="ft2-base_interface.html#FT_Face">FT_Face</a> handle.</p>

+</td></tr>

+<tr><td class="val" id="start">start</td><td class="desc">

+<p>The first glyph index.</p>

+</td></tr>

+<tr><td class="val" id="count">count</td><td class="desc">

+<p>The number of advance values you want to retrieve.</p>

+</td></tr>

+<tr><td class="val" id="load_flags">load_flags</td><td class="desc">

+<p>A set of bit flags similar to those used when calling <a href="ft2-base_interface.html#FT_Load_Glyph">FT_Load_Glyph</a>.</p>

+</td></tr>

+</table>

+<h4>output</h4>

+<table class="fields">

+<tr><td class="val" id="padvance">padvance</td><td class="desc">

+<p>The advance values. This array, to be provided by the caller, must contain at least ‘count’ elements.</p>

+<p>If scaling is performed (based on the value of ‘load_flags’), the advance values are in 16.16 format. Otherwise, they are in font units.</p>

+<p>If <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_VERTICAL_LAYOUT</a> is set, these are the vertical advances corresponding to a vertical layout. Otherwise, they are the horizontal advances in a horizontal layout.</p>

+</td></tr>

+</table>

+<h4>return</h4>

+<p>FreeType error code. 0 means success.</p>

+<h4>note</h4>

+<p>Scaled advances are returned in 16.16 format but aren't transformed by the affine transformation specified by <a href="ft2-base_interface.html#FT_Set_Transform">FT_Set_Transform</a>.</p>

+<hr>

+<div class="section">

+<h3 id="FT_ADVANCE_FLAG_FAST_ONLY">FT_ADVANCE_FLAG_FAST_ONLY</h3>

+<p>Defined in FT_ADVANCES_H (freetype/ftadvanc.h).</p>

+<pre>

+#define <b>FT_ADVANCE_FLAG_FAST_ONLY</b> 0x20000000L

+</pre>

+<p>A bit-flag to be OR-ed with the ‘flags’ parameter of the <a href="ft2-quick_advance.html#FT_Get_Advance">FT_Get_Advance</a> and <a href="ft2-quick_advance.html#FT_Get_Advances">FT_Get_Advances</a> functions.</p>

+<p>If set, it indicates that you want these functions to fail if the corresponding hinting mode or font driver doesn't allow for very quick advance computation.</p>

+<p>Typically, glyphs that are either unscaled, unhinted, bitmapped, or light-hinted can have their advance width computed very quickly.</p>

+<p>Normal and bytecode hinted modes that require loading, scaling, and hinting of the glyph outline, are extremely slow by comparison.</p>

+<hr>

+</body>

+</html>