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139 lines
5.9 KiB
HTML
139 lines
5.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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"http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>FreeType-2.5.0 API Reference</title>
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body { font-family: Verdana, Geneva, Arial, Helvetica, serif;
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a:hover { color: #FF0000; }
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span.keyword { font-family: monospace;
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text-align: left;
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white-space: pre;
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pre.colored { color: blue; }
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ul.empty { list-style-type: none; }
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</style>
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</head>
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<body>
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<table align=center><tr><td><font size=-1>[<a href="ft2-index.html">Index</a>]</font></td>
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<td width="100%"></td>
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<td><font size=-1>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
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<center><h1>FreeType-2.5.0 API Reference</h1></center>
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<center><h1>
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The CFF driver
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</h1></center>
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<h2>Synopsis</h2>
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<table align=center cellspacing=5 cellpadding=0 border=0>
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<tr><td></td><td><a href="#hinting-engine">hinting-engine</a></td><td></td><td><a href="#FT_CFF_HINTING_XXX">FT_CFF_HINTING_XXX</a></td><td></td><td><a href="#no-stem-darkening">no-stem-darkening</a></td></tr>
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</table><br><br>
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<table align=center width="87%"><tr><td>
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<p>While FreeType's CFF driver doesn't expose API functions by itself, it is possible to control its behaviour with <a href="ft2-module_management.html#FT_Property_Set">FT_Property_Set</a> and <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a>. The following lists the available properties together with the necessary macros and structures.</p>
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<p>The CFF driver's module name is ‘cff’.</p>
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</td></tr></table><br>
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<table align=center width="75%"><tr><td>
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<h4><a name="hinting-engine">hinting-engine</a></h4>
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<table align=center width="87%"><tr><td>
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<p>Thanks to Adobe, which contributed a new hinting (and parsing) engine, an application can select between ‘freetype’ and ‘adobe’ if compiled with CFF_CONFIG_OPTION_OLD_ENGINE. If this configuration macro isn't defined, ‘hinting-engine’ does nothing.</p>
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<p>The default engine is ‘freetype’ if CFF_CONFIG_OPTION_OLD_ENGINE is defined, and ‘adobe’ otherwise.</p>
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<p>The following example code demonstrates how to select Adobe's hinting engine (omitting the error handling).</p>
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<pre class="colored">
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FT_Library library;
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FT_Face face;
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FT_UInt hinting_engine = FT_CFF_HINTING_ADOBE;
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FT_Init_FreeType( &library );
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FT_Property_Set( library, "cff",
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"hinting-engine", &hinting_engine );
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</pre>
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</td></tr></table><br>
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<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
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<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
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</td></tr></table>
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</td></tr></table>
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<hr width="75%">
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<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
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<td width="100%"></td>
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<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
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<table align=center width="75%"><tr><td>
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<h4><a name="FT_CFF_HINTING_XXX">FT_CFF_HINTING_XXX</a></h4>
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<table align=center width="87%"><tr><td>
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Defined in FT_CFF_DRIVER_H (freetype/ftcffdrv.h).
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</td></tr></table><br>
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<table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre>
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#define <a href="ft2-cff_driver.html#FT_CFF_HINTING_XXX">FT_CFF_HINTING_FREETYPE</a> 0
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#define <a href="ft2-cff_driver.html#FT_CFF_HINTING_XXX">FT_CFF_HINTING_ADOBE</a> 1
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</pre></table><br>
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<table align=center width="87%"><tr><td>
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<p>A list of constants used for the <a href="ft2-cff_driver.html#hinting-engine">hinting-engine</a> property to select the hinting engine for CFF fonts.</p>
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</td></tr></table><br>
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<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>values</b></em></td></tr><tr><td>
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<p></p>
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<table cellpadding=3 border=0>
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<tr valign=top><td colspan=0><b>FT_CFF_HINTING_FREETYPE</b></td></tr>
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<tr valign=top><td></td><td>
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<p>Use the old FreeType hinting engine.</p>
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</td></tr>
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<tr valign=top><td><b>FT_CFF_HINTING_ADOBE</b></td><td>
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<p>Use the hinting engine contributed by Adobe.</p>
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</td></tr>
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</table>
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</td></tr></table>
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</td></tr></table>
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<hr width="75%">
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<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
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<td width="100%"></td>
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<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
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<table align=center width="75%"><tr><td>
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<h4><a name="no-stem-darkening">no-stem-darkening</a></h4>
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<table align=center width="87%"><tr><td>
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<p>By default, the Adobe CFF engine darkens stems at smaller sizes, regardless of hinting, to enhance contrast. Setting this property, stem darkening gets switched off.</p>
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<p>Note that stem darkening is never applied if <a href="ft2-base_interface.html#FT_LOAD_XXX">FT_LOAD_NO_SCALE</a> is set.</p>
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<pre class="colored">
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FT_Library library;
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FT_Face face;
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FT_Bool no_stem_darkening = TRUE;
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FT_Init_FreeType( &library );
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FT_Property_Set( library, "cff",
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"no-stem-darkening", &no_stem_darkening );
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</pre>
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</td></tr></table><br>
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<table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td>
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<p>This property can be used with <a href="ft2-module_management.html#FT_Property_Get">FT_Property_Get</a> also.</p>
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</td></tr></table>
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</td></tr></table>
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<hr width="75%">
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<table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td>
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<td width="100%"></td>
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<td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table>
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</body>
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</html>
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