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<a href="#desc" class="shortcut">Description</a>
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<div class="refentry" lang="en">
<a name="PangoEngineLang"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
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<h2><span class="refentrytitle"><a name="top_of_page"></a>PangoEngineLang</span></h2>
<p>PangoEngineLang — Rendering-system independent script engines</p>
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<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
<a href="PangoEngineLang.html#PangoEngineLang-struct">PangoEngineLang</a>;
<a href="PangoEngineLang.html#PangoEngineLangClass">PangoEngineLangClass</a>;
#define <a href="PangoEngineLang.html#PANGO-ENGINE-TYPE-LANG:CAPS">PANGO_ENGINE_TYPE_LANG</a>
#define <a href="PangoEngineLang.html#PANGO-ENGINE-LANG-DEFINE-TYPE:CAPS">PANGO_ENGINE_LANG_DEFINE_TYPE</a> (name, prefix, class_init, instance_init)
</pre>
</div>
<div class="refsect1" lang="en">
<a name="object_hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a
href="../gobject/gobject-The-Base-Object-Type.html#GObject"
>GObject</a>
+----<a href="pango-Engines.html#PangoEngine">PangoEngine</a>
+----PangoEngineLang
</pre>
</div>
<div class="refsect1" lang="en">
<a name="desc"></a><h2>Description</h2>
<p>
The <em class="firstterm">language engines</em> are rendering-system independent
engines that determine line, word, and character breaks for character strings.
These engines are used in <a href="pango-Text-Processing.html#pango-break"><code class="function">pango_break()</code></a>.
</p>
</div>
<div class="refsect1" lang="en">
<a name="details"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id2910221"></a><h3>
<a name="PangoEngineLang-struct"></a>PangoEngineLang</h3>
<a class="indexterm" name="id2910233"></a><pre class="programlisting">typedef struct _PangoEngineLang PangoEngineLang;</pre>
<p>
The <a href="PangoEngineLang.html" title="PangoEngineLang"><span class="type">PangoEngineLang</span></a> class is implemented by engines that
customize the rendering-system independent part of the
Pango pipeline for a particular script or language. For
instance, a custom <a href="PangoEngineLang.html" title="PangoEngineLang"><span class="type">PangoEngineLang</span></a> could be provided for
Thai to implement the dictionary-based word boundary
lookups needed for that language.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2910273"></a><h3>
<a name="PangoEngineLangClass"></a>PangoEngineLangClass</h3>
<a class="indexterm" name="id2910286"></a><pre class="programlisting">typedef struct {
void (*script_break) (PangoEngineLang *engine,
const char *text,
int len,
PangoAnalysis *analysis,
PangoLogAttr *attrs,
int attrs_len);
} PangoEngineLangClass;
</pre>
<p>
Class structure for <a href="PangoEngineLang.html" title="PangoEngineLang"><span class="type">PangoEngineLang</span></a></p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="structfield"><code>script_break</code></em> ()</span></td>
<td> Provides a custom implementation of <a href="pango-Text-Processing.html#pango-break"><code class="function">pango_break()</code></a>.
if this is <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a>, <a href="pango-Text-Processing.html#pango-default-break"><code class="function">pango_default_break()</code></a> will be used.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2910365"></a><h3>
<a name="PANGO-ENGINE-TYPE-LANG:CAPS"></a>PANGO_ENGINE_TYPE_LANG</h3>
<a class="indexterm" name="id2910379"></a><pre class="programlisting">#define PANGO_ENGINE_TYPE_LANG "PangoEngineLang"
</pre>
<p>
A string constant defining the engine type
for language engines.
These engines derive from <a href="PangoEngineLang.html" title="PangoEngineLang"><span class="type">PangoEngineLang</span></a>.
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2910404"></a><h3>
<a name="PANGO-ENGINE-LANG-DEFINE-TYPE:CAPS"></a>PANGO_ENGINE_LANG_DEFINE_TYPE()</h3>
<a class="indexterm" name="id2910418"></a><pre class="programlisting">#define PANGO_ENGINE_LANG_DEFINE_TYPE(name, prefix, class_init, instance_init)</pre>
<p>
Outputs the necessary code for GObject type registration for a
<a href="PangoEngineLang.html" title="PangoEngineLang"><span class="type">PangoEngineLang</span></a> class defined in a module. Two static symbols
are defined.
</p>
<p>
</p>
<pre class="programlisting">
static GType <em class="replaceable"><code>prefix</code></em>_type;
static void <em class="replaceable"><code>prefix</code></em>_register_type (GTypeModule module);
</pre>
<p>
</p>
<p>
The <code class="function"><em class="replaceable"><code>prefix</code></em>, <code class="function">_register_type()</code></code>
function should be called in your <a href="pango-Engines.html#script-engine-init"><code class="function">script_engine_init()</code></a> function for
each type that your module implements, and then your <a href="pango-Engines.html#script-engine-create"><code class="function">script_engine_create()</code></a>
function can create instances of the object as follows:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
PangoEngine *engine = g_object_new (<em class="replaceable"><code>prefix</code></em>_type, NULL);
</pre></div>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>name</code></em> :</span></td>
<td> Name of the the type to register (for example:, <code class="literal">ArabicEngineFc</code>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>prefix</code></em> :</span></td>
<td> Prefix for symbols that will be defined (for example:, <code class="literal">arabic_engine_fc</code>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>class_init</code></em> :</span></td>
<td> Class initialization function for the new type, or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>instance_init</code></em> :</span></td>
<td> Instance initialization function for the new type, or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a>
</td>
</tr>
</tbody>
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