gdk-images.html

最新gtk中文资料集

<div class="variablelist"><table border="0">
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<td><p><span class="term"><em class="parameter"><code>image</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> the image
</td>
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</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3136158"></a><h3>
<a name="gdk-image-unref"></a>gdk_image_unref ()</h3>
<a class="indexterm" name="id3136173"></a><pre class="programlisting">void                gdk_image_unref                     (<a class="link" href="gdk-Images.html#GdkImage">GdkImage</a> *image);</pre>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">gdk_image_unref</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
Deprecated function; use <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> instead.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<td><p><span class="term"><em class="parameter"><code>image</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3136254"></a><h3>
<a name="gdk-image-destroy"></a>gdk_image_destroy</h3>
<a class="indexterm" name="id3136269"></a><pre class="programlisting">#define gdk_image_destroy              gdk_image_unref
</pre>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<h3 class="title">Warning</h3>
<p><code class="literal">gdk_image_destroy</code> is deprecated and should not be used in newly-written code.</p>
</div>
<p>
Destroys a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>, freeing any resources allocated for it.
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3136306"></a><h3>
<a name="gdk-image-get-colormap"></a>gdk_image_get_colormap ()</h3>
<a class="indexterm" name="id3136320"></a><pre class="programlisting"><a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a>*        gdk_image_get_colormap              (<a class="link" href="gdk-Images.html#GdkImage">GdkImage</a> *image);</pre>
<p>
Retrieves the colormap for a given image, if it exists.  An image
will have a colormap if the drawable from which it was created has
a colormap, or if a colormap was set explicitely with
<a class="link" href="gdk-Images.html#gdk-image-set-colormap"><code class="function">gdk_image_set_colormap()</code></a>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<td><p><span class="term"><em class="parameter"><code>image</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> colormap for the image
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3136401"></a><h3>
<a name="gdk-image-set-colormap"></a>gdk_image_set_colormap ()</h3>
<a class="indexterm" name="id3136415"></a><pre class="programlisting">void                gdk_image_set_colormap              (<a class="link" href="gdk-Images.html#GdkImage">GdkImage</a> *image,
                                                         <a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap">GdkColormap</a> *colormap);</pre>
<p>
Sets the colormap for the image to the given colormap.  Normally
there's no need to use this function, images are created with the
correct colormap if you get the image from a drawable. If you
create the image from scratch, use the colormap of the drawable you
intend to render the image to.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<td><p><span class="term"><em class="parameter"><code>image</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>colormap</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Colormaps-and-Colors.html#GdkColormap"><span class="type">GdkColormap</span></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3136506"></a><h3>
<a name="gdk-image-put-pixel"></a>gdk_image_put_pixel ()</h3>
<a class="indexterm" name="id3136519"></a><pre class="programlisting">void                gdk_image_put_pixel                 (<a class="link" href="gdk-Images.html#GdkImage">GdkImage</a> *image,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> x,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> y,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint32"
>guint32</a> pixel);</pre>
<p>
Sets a pixel in a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a> to a given pixel value.
</p>
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<td><p><span class="term"><em class="parameter"><code>image</code></em>&#160;:</span></p></td>
<td>a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em>&#160;:</span></p></td>
<td>the x coordinate of the pixel to set.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em>&#160;:</span></p></td>
<td>the y coordinate of the pixel to set.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>pixel</code></em>&#160;:</span></p></td>
<td>the pixel value to set.


</td>
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</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3136647"></a><h3>
<a name="gdk-image-get-pixel"></a>gdk_image_get_pixel ()</h3>
<a class="indexterm" name="id3136660"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint32"
>guint32</a>             gdk_image_get_pixel                 (<a class="link" href="gdk-Images.html#GdkImage">GdkImage</a> *image,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> x,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> y);</pre>
<p>
Gets a pixel value at a specified position in a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>.
</p>
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<td><p><span class="term"><em class="parameter"><code>image</code></em>&#160;:</span></p></td>
<td>a <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em>&#160;:</span></p></td>
<td>the x coordinate of the pixel to get.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em>&#160;:</span></p></td>
<td>the y coordinate of the pixel to get.
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td>the pixel value at the given position.


</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1" lang="en">
<a name="id3136778"></a><h2>See Also</h2>
<p>
</p>
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<td><p><span class="term"><a class="link" href="gdk-Bitmaps-and-Pixmaps.html" title="Bitmaps and Pixmaps">Bitmaps and Pixmaps</a></span></p></td>
<td><p>
Graphics which are stored on the X Windows server.
Since these are stored on the server they can be drawn very quickly, and all
of the <a class="link" href="gdk-Drawing-Primitives.html" title="Drawing Primitives">Drawing Primitives</a> can be
used to draw on them. Their main disadvantage is that manipulating individual
pixels can be very slow.
</p></td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gdk-GdkRGB.html" title="GdkRGB">GdkRGB</a></span></p></td>
<td><p>
Built on top of <a class="link" href="gdk-Images.html#GdkImage"><span class="type">GdkImage</span></a>, this provides much more functionality,
including the dithering of colors to produce better output on low-color
displays.
</p></td>
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<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id3136846"></a><div class="refsect2" lang="en"><a name="id3136847"></a></div>
<hr>
<div class="refsect2" lang="en"><a name="id3136848"></a></div>
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