pangofcfontmap.html

GTK+-2.0源码之pango-1.15.6.tar.gz

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<div class="refsect2" lang="en">
<a name="id2917533"></a><h3>
<a name="pango-fc-font-description-from-pattern"></a>pango_fc_font_description_from_pattern ()</h3>
<a class="indexterm" name="id2917550"></a><pre class="programlisting"><a href="pango-Fonts.html#PangoFontDescription">PangoFontDescription</a>* pango_fc_font_description_from_pattern
                                            (FcPattern *pattern,
                                             <a
href="../glib/glib-Basic-Types.html#gboolean"
>gboolean</a> include_size);</pre>
<p>
Creates a <a href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a> that matches the specified
Fontconfig pattern as closely as possible. Many possible Fontconfig
pattern values, such as <code class="literal">FC_RASTERIZER</code> or <code class="literal">FC_DPI</code>, don't make sense in
the context of <a href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a>, so will be ignored.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<tbody>
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<td>
<span class="term"><em class="parameter"><code>pattern</code></em>&#160;:</span></td>
<td> a <span class="type">FcPattern</span>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>include_size</code></em>&#160;:</span></td>
<td> if <a
href="../glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a>, the pattern will include the size from
  the <em class="parameter"><code>pattern</code></em>; otherwise the resulting pattern will be unsized.
  (only <code class="literal">FC_SIZE</code> is examined, not <code class="literal">FC_PIXEL_SIZE</code>)
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a>. Free with
 <a href="pango-Fonts.html#pango-font-description-free"><code class="function">pango_font_description_free()</code></a>.

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<p>Since  1.4
</p>
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<div class="refsect2" lang="en">
<a name="id2917751"></a><h3>
<a name="pango-fc-font-map-cache-clear"></a>pango_fc_font_map_cache_clear ()</h3>
<a class="indexterm" name="id2917766"></a><pre class="programlisting">void        pango_fc_font_map_cache_clear   (<a href="PangoFcFontMap.html" title="PangoFcFontMap">PangoFcFontMap</a> *fcfontmap);</pre>
<p>
Clear all cached information and fontsets for this font map;
this should be called whenever there is a change in the
output of the <code class="function">default_substitute()</code> virtual function.
</p>
<p>
This function is intended to be used only by backend implementations
deriving from <span class="type">PangoFcFontmap</span>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>fcfontmap</code></em>&#160;:</span></td>
<td> a <span class="type">PangoFcFontmap</span>
</td>
</tr></tbody>
</table></div>
<p>Since  1.4
</p>
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<hr>
<div class="refsect2" lang="en">
<a name="id2917858"></a><h3>
<a name="pango-fc-font-map-create-context"></a>pango_fc_font_map_create_context ()</h3>
<a class="indexterm" name="id2917874"></a><pre class="programlisting"><a href="pango-Text-Processing.html#PangoContext">PangoContext</a>* pango_fc_font_map_create_context
                                            (<a href="PangoFcFontMap.html" title="PangoFcFontMap">PangoFcFontMap</a> *fcfontmap);</pre>
<p>
Creates a new context for this fontmap. This function is intended
only for backend implementations deriving from <span class="type">PangoFcFontmap</span>;
it is possible that a backend will store additional information
needed for correct operation on the <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> after calling
this function.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>fcfontmap</code></em>&#160;:</span></td>
<td> a <a href="PangoFcFontMap.html" title="PangoFcFontMap"><span class="type">PangoFcFontMap</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>

</td>
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</tbody>
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<p>Since  1.4
</p>
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<hr>
<div class="refsect2" lang="en">
<a name="id2917977"></a><h3>
<a name="pango-fc-font-map-shutdown"></a>pango_fc_font_map_shutdown ()</h3>
<a class="indexterm" name="id2917993"></a><pre class="programlisting">void        pango_fc_font_map_shutdown      (<a href="PangoFcFontMap.html" title="PangoFcFontMap">PangoFcFontMap</a> *fcfontmap);</pre>
<p>
Clears all cached information for the fontmap and marks
all fonts open for the fontmap as dead. (See the <code class="function">shutdown()</code>
virtual function of <a href="PangoFcFont.html" title="PangoFcFont"><span class="type">PangoFcFont</span></a>.) This function might be used
by a backend when the underlying windowing system for the font
map exits. This function is only intended to be called from
only for backend implementations deriving from <span class="type">PangoFcFontmap</span>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>fcfontmap</code></em>&#160;:</span></td>
<td> a <span class="type">PangoFcFontmap</span>
</td>
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<p>Since  1.4
</p>
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<hr>
<div class="refsect2" lang="en">
<a name="id2918088"></a><h3>
<a name="pango-fc-font-map-add-decoder-find-func"></a>pango_fc_font_map_add_decoder_find_func ()</h3>
<a class="indexterm" name="id2918104"></a><pre class="programlisting">void        pango_fc_font_map_add_decoder_find_func
                                            (<a href="PangoFcFontMap.html" title="PangoFcFontMap">PangoFcFontMap</a> *fcfontmap,
                                             <a href="PangoFcFontMap.html#PangoFcDecoderFindFunc">PangoFcDecoderFindFunc</a> findfunc,
                                             <a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> user_data,
                                             <a
href="../glib/glib-Datasets.html#GDestroyNotify"
>GDestroyNotify</a> dnotify);</pre>
<p>
This function saves a callback method in the <a href="PangoFcFontMap.html" title="PangoFcFontMap"><span class="type">PangoFcFontMap</span></a> that
will be called whenever new fonts are created.  If the
function returns a <a href="PangoFcDecoder.html" title="PangoFcDecoder"><span class="type">PangoFcDecoder</span></a>, that decoder will be used to
determine both coverage via a <span class="type">FcCharSet</span> and a one-to-one mapping of
characters to glyphs.  This will allow applications to have
application-specific encodings for various fonts.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>fcfontmap</code></em>&#160;:</span></td>
<td> The <a href="PangoFcFontMap.html" title="PangoFcFontMap"><span class="type">PangoFcFontMap</span></a> to add this method to.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>findfunc</code></em>&#160;:</span></td>
<td> The <a href="PangoFcFontMap.html#PangoFcDecoderFindFunc"><span class="type">PangoFcDecoderFindFunc</span></a> callback function
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>user_data</code></em>&#160;:</span></td>
<td> User data.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>dnotify</code></em>&#160;:</span></td>
<td> A <a
href="../glib/glib-Datasets.html#GDestroyNotify"
><span class="type">GDestroyNotify</span></a> callback that will be called when the
 fontmap is finalized and the decoder is released.
</td>
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<p>Since  1.6.
</p>
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<hr>
<div class="refsect2" lang="en">
<a name="id2918284"></a><h3>
<a name="PangoFcDecoderFindFunc"></a>PangoFcDecoderFindFunc ()</h3>
<a class="indexterm" name="id2918298"></a><pre class="programlisting"><a href="PangoFcDecoder.html" title="PangoFcDecoder">PangoFcDecoder</a>* (*PangoFcDecoderFindFunc)   (FcPattern *pattern,
                                             <a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> user_data);</pre>
<p>
Callback function passed to <a href="PangoFcFontMap.html#pango-fc-font-map-add-decoder-find-func"><code class="function">pango_fc_font_map_add_decoder_find_func()</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<td>
<span class="term"><em class="parameter"><code>pattern</code></em>&#160;:</span></td>
<td> a fully resolved <span class="type">FcPattern</span> specifying the font on the system
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>user_data</code></em>&#160;:</span></td>
<td> user data passed to <a href="PangoFcFontMap.html#pango-fc-font-map-add-decoder-find-func"><code class="function">pango_fc_font_map_add_decoder_find_func()</code></a>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> a new reference to a custom decoder for this pattern,
 or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> if the default decoder handling should be used.
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<div class="refsect1" lang="en">
<a name="id2918425"></a><h2>See Also</h2>
<p>
</p>
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<td>
<span class="term"><a href="PangoFcFont.html" title="PangoFcFont"><span class="type">PangoFcFont</span></a></span></td>
<td><p>The base class for fonts; creating a new
Fontconfig-based backend involves deriving from both
<a href="PangoFcFontMap.html" title="PangoFcFontMap"><span class="type">PangoFcFontMap</span></a> and <a href="PangoFcFont.html" title="PangoFcFont"><span class="type">PangoFcFont</span></a>.
</p></td>
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