pango-text-processing.html

GTK+-2.0源码之pango-1.15.6.tar.gz

</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2758109"></a><h3>
<a name="pango-context-get-gravity"></a>pango_context_get_gravity ()</h3>
<a class="indexterm" name="id2758125"></a><pre class="programlisting"><a href="pango-Vertical-Text.html#PangoGravity">PangoGravity</a> pango_context_get_gravity      (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context);</pre>
<p>
Retrieves the gravity for the context. This is similar to
<a href="pango-Text-Processing.html#pango-context-get-base-gravity"><code class="function">pango_context_get_base_gravity()</code></a>, except for when the base gravity
is <a href="pango-Vertical-Text.html#PANGO-GRAVITY-AUTO:CAPS"><code class="literal">PANGO_GRAVITY_AUTO</code></a> for which <a href="pango-Vertical-Text.html#pango-gravity-get-for-matrix"><code class="function">pango_gravity_get_for_matrix()</code></a> is used
to return the gravity from the current context matrix.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the resolved gravity for the context.

</td>
</tr>
</tbody>
</table></div>
<p>Since  1.16
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2758237"></a><h3>
<a name="pango-context-get-gravity-hint"></a>pango_context_get_gravity_hint ()</h3>
<a class="indexterm" name="id2758252"></a><pre class="programlisting"><a href="pango-Vertical-Text.html#PangoGravityHint">PangoGravityHint</a> pango_context_get_gravity_hint
                                            (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context);</pre>
<p>
Retrieves the gravity hint for the context. See
<a href="pango-Text-Processing.html#pango-context-set-gravity-hint"><code class="function">pango_context_set_gravity_hint()</code></a> for details.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the gravity hint for the context.

</td>
</tr>
</tbody>
</table></div>
<p>Since  1.16
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2758339"></a><h3>
<a name="pango-context-set-gravity-hint"></a>pango_context_set_gravity_hint ()</h3>
<a class="indexterm" name="id2758354"></a><pre class="programlisting">void        pango_context_set_gravity_hint  (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context,
                                             <a href="pango-Vertical-Text.html#PangoGravityHint">PangoGravityHint</a> hint);</pre>
<p>
Sets the gravity hint for the context.
</p>
<p>
The gravity hint is used in laying vertical text out, and is only relevant
if gravity of the context as returned by <a href="pango-Text-Processing.html#pango-context-get-gravity"><code class="function">pango_context_get_gravity()</code></a>
is set <a href="pango-Vertical-Text.html#PANGO-GRAVITY-EAST:CAPS"><code class="literal">PANGO_GRAVITY_EAST</code></a> or <a href="pango-Vertical-Text.html#PANGO-GRAVITY-WEST:CAPS"><code class="literal">PANGO_GRAVITY_WEST</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>hint</code></em>&#160;:</span></td>
<td> the new gravity hint
</td>
</tr>
</tbody>
</table></div>
<p>Since  1.16
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2758480"></a><h3>
<a name="pango-context-get-matrix"></a>pango_context_get_matrix ()</h3>
<a class="indexterm" name="id2758495"></a><pre class="programlisting">const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a>* pango_context_get_matrix (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context);</pre>
<p>
Gets the transformation matrix that will be applied when
rendering with this context. See <a href="pango-Text-Processing.html#pango-context-set-matrix"><code class="function">pango_context_set_matrix()</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td> the matrix, or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> if no matrix has been set
 (which is the same as the identity matrix). The returned
 matrix is owned by Pango and must not be modified or
 freed.

</td>
</tr>
</tbody>
</table></div>
<p>Since  1.6
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2758594"></a><h3>
<a name="pango-context-set-matrix"></a>pango_context_set_matrix ()</h3>
<a class="indexterm" name="id2758609"></a><pre class="programlisting">void        pango_context_set_matrix        (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context,
                                             const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix);</pre>
<p>
Sets the transformation matrix that will be applied when rendering
with this context. Note that reported metrics are in the user space
coordinates before the application of the matrix, not device-space
coordinates after the application of the matrix. So, they don't scale
with the matrix, though they may change slightly for different
matrices, depending on how the text is fit to the pixel grid.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>matrix</code></em>&#160;:</span></td>
<td> a <a href="pango-Glyph-Storage.html#PangoMatrix"><span class="type">PangoMatrix</span></a>, or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> to unset any existing matrix.
 (No matrix set is the same as setting the identity matrix.)
</td>
</tr>
</tbody>
</table></div>
<p>Since  1.6
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2758719"></a><h3>
<a name="pango-context-load-font"></a>pango_context_load_font ()</h3>
<a class="indexterm" name="id2758732"></a><pre class="programlisting"><a href="pango-Fonts.html#PangoFont">PangoFont</a>*  pango_context_load_font         (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context,
                                             const <a href="pango-Fonts.html#PangoFontDescription">PangoFontDescription</a> *desc);</pre>
<p>
Loads the font in one of the fontmaps in the context
that is the closest match for <em class="parameter"><code>desc</code></em>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>desc</code></em>&#160;:</span></td>
<td> a <a href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a> describing the font to load
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td>the font loaded, or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> if no font matched.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2758850"></a><h3>
<a name="pango-context-load-fontset"></a>pango_context_load_fontset ()</h3>
<a class="indexterm" name="id2758863"></a><pre class="programlisting"><a href="pango-Fonts.html#PangoFontset">PangoFontset</a>* pango_context_load_fontset    (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context,
                                             const <a href="pango-Fonts.html#PangoFontDescription">PangoFontDescription</a> *desc,
                                             <a href="pango-Text-Attributes.html#PangoLanguage">PangoLanguage</a> *language);</pre>
<p>
Load a set of fonts in the context that can be used to render
a font matching <em class="parameter"><code>desc</code></em>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>context</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>desc</code></em>&#160;:</span></td>
<td> a <a href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a> describing the fonts to load
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>language</code></em>&#160;:</span></td>
<td> a <a href="pango-Text-Attributes.html#PangoLanguage"><span class="type">PangoLanguage</span></a> the fonts will be used for
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></td>
<td>the fontset, or <a
href="../glib/glib-Standard-Macros.html#NULL:CAPS"
><code class="literal">NULL</code></a> if no font matched.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2759011"></a><h3>
<a name="pango-context-get-metrics"></a>pango_context_get_metrics ()</h3>
<a class="indexterm" name="id2759024"></a><pre class="programlisting"><a href="pango-Fonts.html#PangoFontMetrics">PangoFontMetrics</a>* pango_context_get_metrics (<a href="pango-Text-Processing.html#PangoContext">PangoContext</a> *context,
                                             const <a href="pango-Fonts.html#PangoFontDescription">PangoFontDescription</a> *desc,
                                             <a href="pango-Text-Attributes.html#PangoLanguage">PangoLanguage</a> *language);</pre>
<p>
Get overall metric information for a particular font
description.  Since the metrics may be substantially different for
different scripts, a language tag can be provided to indicate that
the metrics should be retrieved that correspond to the script(s)
used by that language.
</p>
<p>
The <a href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a> is interpreted in the same way as
by <a href="pango-Text-Processing.html#pango-itemize"><code class="function">pango_itemize()</code></a>, and the family name may be a comma separated
list of figures. If characters from multiple of these families
would be used to render the string, then the returned fonts would
be a composite o