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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=US-ASCII"><title>OpenType Font Handling</title><meta name="generator" content="DocBook XSL Stylesheets V1.72.0"><link rel="start" href="index.html" title="Pango Reference Manual"><link rel="up" href="lowlevel.html" title="Low Level Functionality"><link rel="prev" href="PangoFcDecoder.html" title="PangoFcDecoder"><link rel="next" href="pango-Coverage-Maps.html" title="Coverage Maps"><meta name="generator" content="GTK-Doc V1.8 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="chapter" href="pango.html" title="Basic Pango Interfaces"><link rel="chapter" href="rendering.html" title="Rendering with Pango"><link rel="chapter" href="lowlevel.html" title="Low Level Functionality"><link rel="chapter" href="tools.html" title="Pango Tools"><link rel="chapter" href="pango-hierarchy.html" title="Object Hierarchy"><link rel="index" 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cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="PangoFcDecoder.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="lowlevel.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">Pango Reference Manual</th><td><a accesskey="n" href="pango-Coverage-Maps.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#id3259943" class="shortcut">Top</a>  |  <a href="#id3261322" class="shortcut">Description</a>  |  <a href="#id3261284" class="shortcut">Object Hierarchy</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="pango-OpenType-Font-Handling"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><a name="id3259943"></a><span class="refentrytitle">OpenType Font Handling</span></h2><p>OpenType Font Handling — Obtaining information from OpenType tables</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsect1" lang="en"><a name="id3259333"></a><h2>Stability Level</h2>Unstable, unless otherwise indicated</div><div class="refsynopsisdiv"><h2>Synopsis</h2><a name="PangoOTInfo"></a><a name="PangoOTRuleset"></a><pre class="synopsis">typedef <a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a>; <a href="pango-OpenType-Font-Handling.html#PangoOTInfo-struct">PangoOTInfo</a>; <a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a>; <a href="pango-OpenType-Font-Handling.html#PangoOTGlyph">PangoOTGlyph</a>; <a href="pango-OpenType-Font-Handling.html#PangoOTRuleset-struct">PangoOTRuleset</a>; <a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a>;enum <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a>; <a href="pango-OpenType-Font-Handling.html#PangoOTFeatureMap">PangoOTFeatureMap</a>;#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-TAG-MAKE:CAPS">PANGO_OT_TAG_MAKE</a> (c1,c2,c3,c4)#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-TAG-MAKE-FROM-STRING:CAPS">PANGO_OT_TAG_MAKE_FROM_STRING</a> (s)#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-ALL-GLYPHS:CAPS">PANGO_OT_ALL_GLYPHS</a>#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-NO-FEATURE:CAPS">PANGO_OT_NO_FEATURE</a>#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-NO-SCRIPT:CAPS">PANGO_OT_NO_SCRIPT</a>#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-DEFAULT-LANGUAGE:CAPS">PANGO_OT_DEFAULT_LANGUAGE</a>#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-TAG-DEFAULT-LANGUAGE:CAPS">PANGO_OT_TAG_DEFAULT_LANGUAGE</a>#define <a href="pango-OpenType-Font-Handling.html#PANGO-OT-TAG-DEFAULT-SCRIPT:CAPS">PANGO_OT_TAG_DEFAULT_SCRIPT</a><a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-info-get">pango_ot_info_get</a> (FT_Face face);<ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-info-find-script">pango_ot_info_find_script</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, <a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> script_tag, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> *script_index);<ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-info-find-language">pango_ot_info_find_language</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> script_index, <a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> language_tag, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> *language_index, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> *required_feature_index);<ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-info-find-feature">pango_ot_info_find_feature</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, <a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> feature_tag, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> script_index, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> language_index, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> *feature_index);<a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-info-list-scripts">pango_ot_info_list_scripts</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type);<a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-info-list-languages">pango_ot_info_list_languages</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> script_index, <a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> language_tag);<a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-info-list-features">pango_ot_info_list_features</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, <a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> tag, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> script_index, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> language_index);<a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-new">pango_ot_buffer_new</a> (<a href="PangoFcFont.html" title="PangoFcFont">PangoFcFont</a> *font);void <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-destroy">pango_ot_buffer_destroy</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer);void <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-clear">pango_ot_buffer_clear</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer);void <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-add-glyph">pango_ot_buffer_add_glyph</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> glyph, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> properties, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> cluster);void <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-set-rtl">pango_ot_buffer_set_rtl</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer, <ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> rtl);void <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-set-zero-width-marks">pango_ot_buffer_set_zero_width_marks</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer, <ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> zero_width_marks);void <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-get-glyphs">pango_ot_buffer_get_glyphs</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer, <a href="pango-OpenType-Font-Handling.html#PangoOTGlyph">PangoOTGlyph</a> **glyphs, int *n_glyphs);void <a href="pango-OpenType-Font-Handling.html#pango-ot-buffer-output">pango_ot_buffer_output</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer, <a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *glyphs);const <a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-get-for-description">pango_ot_ruleset_get_for_description</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, const <a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a> *desc);<a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-new">pango_ot_ruleset_new</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info);<a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-new-for">pango_ot_ruleset_new_for</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, <a href="pango-Scripts.html#PangoScript">PangoScript</a> script, <a href="pango-Text-Attributes.html#PangoLanguage">PangoLanguage</a> *language);<a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-new-from-description">pango_ot_ruleset_new_from_description</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTInfo">PangoOTInfo</a> *info, const <a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a> *desc);void <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-add-feature">pango_ot_ruleset_add_feature</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a> *ruleset, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> feature_index, <ahref="../glib/glib-Basic-Types.html#gulong">gulong</a> property_bit);<ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-maybe-add-feature">pango_ot_ruleset_maybe_add_feature</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a> *ruleset, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, <a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> feature_tag, <ahref="../glib/glib-Basic-Types.html#gulong">gulong</a> property_bit);<ahref="../glib/glib-Basic-Types.html#guint">guint</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-maybe-add-features">pango_ot_ruleset_maybe_add_features</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a> *ruleset, <a href="pango-OpenType-Font-Handling.html#PangoOTTableType">PangoOTTableType</a> table_type, const <a href="pango-OpenType-Font-Handling.html#PangoOTFeatureMap">PangoOTFeatureMap</a> *features, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> n_features);<ahref="../glib/glib-Basic-Types.html#guint">guint</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-get-feature-count">pango_ot_ruleset_get_feature_count</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a> *ruleset, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> *n_gsub_features, <ahref="../glib/glib-Basic-Types.html#guint">guint</a> *n_gpos_features);void <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-substitute">pango_ot_ruleset_substitute</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a> *ruleset, <a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer);void <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-position">pango_ot_ruleset_position</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTRuleset">PangoOTRuleset</a> *ruleset, <a href="pango-OpenType-Font-Handling.html#PangoOTBuffer">PangoOTBuffer</a> *buffer);<a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-description-copy">pango_ot_ruleset_description_copy</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a> *desc);<ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-description-equal">pango_ot_ruleset_description_equal</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a> *desc1, const <a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a> *desc2);void <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-description-free">pango_ot_ruleset_description_free</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a> *desc);<ahref="../glib/glib-Basic-Types.html#guint">guint</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-ruleset-description-hash">pango_ot_ruleset_description_hash</a> (const <a href="pango-OpenType-Font-Handling.html#PangoOTRulesetDescription">PangoOTRulesetDescription</a> *desc);<a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-tag-from-language">pango_ot_tag_from_language</a> (<a href="pango-Text-Attributes.html#PangoLanguage">PangoLanguage</a> *language);<a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-tag-from-script">pango_ot_tag_from_script</a> (<a href="pango-Scripts.html#PangoScript">PangoScript</a> script);<a href="pango-Text-Attributes.html#PangoLanguage">PangoLanguage</a>* <a href="pango-OpenType-Font-Handling.html#pango-ot-tag-to-language">pango_ot_tag_to_language</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> language_tag);<a href="pango-Scripts.html#PangoScript">PangoScript</a> <a href="pango-OpenType-Font-Handling.html#pango-ot-tag-to-script">pango_ot_tag_to_script</a> (<a href="pango-OpenType-Font-Handling.html#PangoOTTag">PangoOTTag</a> script_tag);</pre></div><div class="refsect1" lang="en"><a name="id3261284"></a><h2>Object Hierarchy</h2><pre class="synopsis"> <ahref="../gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> +----PangoOTInfo</pre><pre class="synopsis"> <ahref="../gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> +----PangoOTRuleset</pre></div><div class="refsect1" lang="en"><a name="id3261322"></a><h2>Description</h2><p>Functions and macros in this section are used to implement the OpenType Layoutfeatures and algorithms. These are mostly useful when writing Fontconfig-basedshaping engines</p></div><div class="refsect1" lang="en"><a name="id3261339"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id3261350"></a><h3><a name="PangoOTTag"></a>PangoOTTag</h3><a class="indexterm" name="id3261362"></a><pre class="programlisting">typedef guint32 PangoOTTag;</pre><p>?? 快捷鍵說(shuō)明
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