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<a href="#PangoEngineLang.synopsis" class="shortcut">Top</a>
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<a href="#PangoEngineLang.description" class="shortcut">Description</a>
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<a href="#PangoEngineLang.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<div class="refentry">
<a name="PangoEngineLang"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="PangoEngineLang.top_of_page"></a>PangoEngineLang</span></h2>
<p>PangoEngineLang — Rendering-system independent script engines</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsect1">
<a name="PangoEngineLang.stability-level"></a><h2>Stability Level</h2>
Unstable, unless otherwise indicated
</div>
<div class="refsynopsisdiv">
<a name="PangoEngineLang.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="PangoEngineLang.html#PangoEngineLang-struct" title="PangoEngineLang">PangoEngineLang</a>;
struct <a class="link" href="PangoEngineLang.html#PangoEngineLangClass" title="struct PangoEngineLangClass">PangoEngineLangClass</a>;
#define <a class="link" href="PangoEngineLang.html#PANGO-ENGINE-TYPE-LANG:CAPS" title="PANGO_ENGINE_TYPE_LANG">PANGO_ENGINE_TYPE_LANG</a>
#define <a class="link" href="PangoEngineLang.html#PANGO-ENGINE-LANG-DEFINE-TYPE:CAPS" title="PANGO_ENGINE_LANG_DEFINE_TYPE()">PANGO_ENGINE_LANG_DEFINE_TYPE</a> (name,
prefix,
class_init,
instance_init)
</pre>
</div>
<div class="refsect1">
<a name="PangoEngineLang.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
GObject
+----<a class="link" href="pango-Engines.html#PangoEngine">PangoEngine</a>
+----PangoEngineLang
</pre>
</div>
<div class="refsect1">
<a name="PangoEngineLang.description"></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 class="link" href="pango-Text-Processing.html#pango-break" title="pango_break ()"><code class="function">pango_break()</code></a>.
</p>
</div>
<div class="refsect1">
<a name="PangoEngineLang.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="PangoEngineLang-struct"></a><h3>PangoEngineLang</h3>
<pre class="programlisting">typedef struct _PangoEngineLang PangoEngineLang;</pre>
<p>
The <a class="link" 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 class="link" 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>
</div>
<hr>
<div class="refsect2">
<a name="PangoEngineLangClass"></a><h3>struct PangoEngineLangClass</h3>
<pre class="programlisting">struct PangoEngineLangClass {
void (*script_break) (PangoEngineLang *engine,
const char *text,
int len,
PangoAnalysis *analysis,
PangoLogAttr *attrs,
int attrs_len);
};
</pre>
<p>
Class structure for <a class="link" href="PangoEngineLang.html" title="PangoEngineLang"><span class="type">PangoEngineLang</span></a>
</p>
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<td><p><span class="term"><em class="structfield"><code><a name="PangoEngineLangClass.script-break"></a>script_break</code></em> ()</span></p></td>
<td>Provides a custom implementation of <a class="link" href="pango-Text-Processing.html#pango-break" title="pango_break ()"><code class="function">pango_break()</code></a>.
If <a href="/home/mclasen/gnome/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL--CAPS"><code class="literal">NULL</code></a>, <a class="link" href="pango-Text-Processing.html#pango-default-break" title="pango_default_break ()"><code class="function">pango_default_break()</code></a> is used instead. If not <a href="/home/mclasen/gnome/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL--CAPS"><code class="literal">NULL</code></a>, for
Pango versions before 1.16 (module interface version before 1.6.0),
this was called instead of <a class="link" href="pango-Text-Processing.html#pango-default-break" title="pango_default_break ()"><code class="function">pango_default_break()</code></a>, but in newer versions,
<a class="link" href="pango-Text-Processing.html#pango-default-break" title="pango_default_break ()"><code class="function">pango_default_break()</code></a> is always called and this is called after that to
allow tailoring the breaking results.</td>
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<hr>
<div class="refsect2">
<a name="PANGO-ENGINE-TYPE-LANG:CAPS"></a><h3>PANGO_ENGINE_TYPE_LANG</h3>
<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 class="link" href="PangoEngineLang.html" title="PangoEngineLang"><span class="type">PangoEngineLang</span></a>.
</p>
</div>
<hr>
<div class="refsect2">
<a name="PANGO-ENGINE-LANG-DEFINE-TYPE:CAPS"></a><h3>PANGO_ENGINE_LANG_DEFINE_TYPE()</h3>
<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 class="link" 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 class="link" href="pango-Engines.html#script-engine-init" title="script_engine_init ()"><code class="function">script_engine_init()</code></a> function for
each type that your module implements, and then your <a class="link" href="pango-Engines.html#script-engine-create" title="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">
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<td class="listing_lines" align="right"><pre>1</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="usertype">PangoEngine</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">engine </span><span class="symbol">=</span><span class="normal"> </span><span class="function">g_object_new</span><span class="normal"> </span><span class="symbol">(<</span><span class="usertype">em</span><span class="normal"> class</span><span class="symbol">=</span><span class="string">"replaceable"</span><span class="symbol">><</span><span class="normal">code</span><span class="symbol">></span><span class="normal">prefix</span><span class="symbol"></</span><span class="normal">code</span><span class="symbol">></</span><span class="normal">em</span><span class="symbol">></span><span class="normal">_type</span><span class="symbol">,</span><span class="normal"> <a href="/home/mclasen/gnome/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL--CAPS">NULL</a></span><span class="symbol">);</span></pre></td>
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<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>Name of the the type to register (for example:, <code class="literal">ArabicEngineFc</code>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>prefix</code></em> :</span></p></td>
<td>Prefix for symbols that will be defined (for example:, <code class="literal">arabic_engine_fc</code>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>class_init</code></em> :</span></p></td>
<td>Class initialization function for the new type, or <a href="/home/mclasen/gnome/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL--CAPS"><code class="literal">NULL</code></a>
</td>
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<tr>
<td><p><span class="term"><em class="parameter"><code>instance_init</code></em> :</span></p></td>
<td>Instance initialization function for the new type, or <a href="/home/mclasen/gnome/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL--CAPS"><code class="literal">NULL</code></a>
</td>
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