gdk-visuals.html

最新gtk中文资料集

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<a name="id3155962"></a><h3>
<a name="gdk-visual-get-best-type"></a>gdk_visual_get_best_type ()</h3>
<a class="indexterm" name="id3155976"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisualType">GdkVisualType</a>       gdk_visual_get_best_type            (void);</pre>
<p>
Return the best available visual type for the default GDK screen.</p>
<p>

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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> best visual type
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<a name="id3156017"></a><h3>
<a name="gdk-visual-get-system"></a>gdk_visual_get_system ()</h3>
<a class="indexterm" name="id3156030"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_visual_get_system               (void);</pre>
<p>
Get the system'sdefault visual for the default GDK screen.
This is the visual for the root window of the display.
The return value should not be freed.</p>
<p>

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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> system visual
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<div class="refsect2" lang="en">
<a name="id3156072"></a><h3>
<a name="gdk-visual-get-best"></a>gdk_visual_get_best ()</h3>
<a class="indexterm" name="id3156086"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_visual_get_best                 (void);</pre>
<p>
Get the visual with the most available colors for the default
GDK screen. The return value should not be freed.</p>
<p>

</p>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> best visual
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<a name="id3156127"></a><h3>
<a name="gdk-visual-get-best-with-depth"></a>gdk_visual_get_best_with_depth ()</h3>
<a class="indexterm" name="id3156141"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_visual_get_best_with_depth      (<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> depth);</pre>
<p>
Get the best visual with depth <em class="parameter"><code>depth</code></em> for the default GDK screen.
Color visuals and visuals with mutable colormaps are preferred
over grayscale or fixed-colormap visuals. The return value should not
be freed. <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> may be returned if no visual supports <em class="parameter"><code>depth</code></em>.</p>
<p>

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<td><p><span class="term"><em class="parameter"><code>depth</code></em>&#160;:</span></p></td>
<td> a bit depth
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> best visual for the given depth
</td>
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<div class="refsect2" lang="en">
<a name="id3156227"></a><h3>
<a name="gdk-visual-get-best-with-type"></a>gdk_visual_get_best_with_type ()</h3>
<a class="indexterm" name="id3156241"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_visual_get_best_with_type       (<a class="link" href="gdk-Visuals.html#GdkVisualType">GdkVisualType</a> visual_type);</pre>
<p>
Get the best visual of the given <em class="parameter"><code>visual_type</code></em> for the default GDK screen.
Visuals with higher color depths are considered better. The return value
should not be freed. <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> may be returned if no visual has type
<em class="parameter"><code>visual_type</code></em>.</p>
<p>

</p>
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<td><p><span class="term"><em class="parameter"><code>visual_type</code></em>&#160;:</span></p></td>
<td> a visual type
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> best visual of the given type
</td>
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<div class="refsect2" lang="en">
<a name="id3156327"></a><h3>
<a name="gdk-visual-get-best-with-both"></a>gdk_visual_get_best_with_both ()</h3>
<a class="indexterm" name="id3156341"></a><pre class="programlisting"><a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a>*          gdk_visual_get_best_with_both       (<a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> depth,
                                                         <a class="link" href="gdk-Visuals.html#GdkVisualType">GdkVisualType</a> visual_type);</pre>
<p>
Combines <a class="link" href="gdk-Visuals.html#gdk-visual-get-best-with-depth"><code class="function">gdk_visual_get_best_with_depth()</code></a> and <a class="link" href="gdk-Visuals.html#gdk-visual-get-best-with-type"><code class="function">gdk_visual_get_best_with_type()</code></a>.</p>
<p>

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<td><p><span class="term"><em class="parameter"><code>depth</code></em>&#160;:</span></p></td>
<td> a bit depth
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>visual_type</code></em>&#160;:</span></p></td>
<td> a visual type
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> best visual with both <em class="parameter"><code>depth</code></em> and <em class="parameter"><code>visual_type</code></em>, or <a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> if none
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<a name="id3156469"></a><h3>
<a name="gdk-visual-ref"></a>gdk_visual_ref()</h3>
<a class="indexterm" name="id3156484"></a><pre class="programlisting">#define gdk_visual_ref(v) g_object_ref(v)
</pre>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">gdk_visual_ref</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
Deprecated equivalent of <a
href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-ref"
><code class="function">g_object_ref()</code></a>.
</p>
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<td><p><span class="term"><em class="parameter"><code>v</code></em>&#160;:</span></p></td>
<td>a <a class="link" href="gdk-Visuals.html#GdkVisual"><span class="type">GdkVisual</span></a>
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td>the same visual


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<div class="refsect2" lang="en">
<a name="id3156559"></a><h3>
<a name="gdk-visual-unref"></a>gdk_visual_unref()</h3>
<a class="indexterm" name="id3156574"></a><pre class="programlisting">#define gdk_visual_unref(v) g_object_unref(v)
</pre>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">gdk_visual_unref</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
Deprecated equivalent of <a
href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref"
><code class="function">g_object_unref()</code></a>.
</p>
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<td><p><span class="term"><em class="parameter"><code>v</code></em>&#160;:</span></p></td>
<td>a <a class="link" href="gdk-Visuals.html#GdkVisual"><span class="type">GdkVisual</span></a>


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<div class="refsect2" lang="en">
<a name="id3156638"></a><h3>
<a name="gdk-visual-get-screen"></a>gdk_visual_get_screen ()</h3>
<a class="indexterm" name="id3156654"></a><pre class="programlisting"><a class="link" href="GdkScreen.html" title="GdkScreen">GdkScreen</a>*          gdk_visual_get_screen               (<a class="link" href="gdk-Visuals.html#GdkVisual">GdkVisual</a> *visual);</pre>
<p>
Gets the screen to which this visual belongs</p>
<p>

</p>
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<td><p><span class="term"><em class="parameter"><code>visual</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Visuals.html#GdkVisual"><span class="type">GdkVisual</span></a>
</td>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> the screen to which this visual belongs.

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<p class="since">Since  2.2
</p>
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<div class="refsect1" lang="en">
<a name="id3156730"></a><h2>See Also</h2>
<p>
<a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>, <a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a>, <span class="type">GdkRGB</span>
</p>
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<a name="id3156764"></a><div class="refsect2" lang="en"><a name="id3156765"></a></div>
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<div class="refsect2" lang="en"><a name="id3156766"></a></div>
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