gdk-gdkrgb.html

最新gtk中文资料集

                                                         <a class="link" href="gdk-GdkRGB.html#GdkRgbDither">GdkRgbDither</a> dith,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> *buf,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> rowstride,
                                                         <a class="link" href="gdk-GdkRGB.html#GdkRgbCmap">GdkRgbCmap</a> *cmap);</pre>
<p>
Draws an indexed image in the drawable, using a <a class="link" href="gdk-GdkRGB.html#GdkRgbCmap"><span class="type">GdkRgbCmap</span></a> to assign
actual colors to the color indices.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em>&#160;:</span></p></td>
<td>The <a class="link" href="gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> to draw in (usually a <a class="link" href="gdk-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a>).
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>
<td>The graphics context.
</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 top-left corner in the drawable.
</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 top-left corner in the drawable.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em>&#160;:</span></p></td>
<td>The width of the rectangle to be drawn.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em>&#160;:</span></p></td>
<td>The height of the rectangle to be drawn.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dith</code></em>&#160;:</span></p></td>
<td>A <a class="link" href="gdk-GdkRGB.html#GdkRgbDither"><span class="type">GdkRgbDither</span></a> value, selecting the desired dither mode.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buf</code></em>&#160;:</span></p></td>
<td>The pixel data, represented as 8-bit color indices.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rowstride</code></em>&#160;:</span></p></td>
<td>The number of bytes from the start of one row in <em class="parameter"><code>buf</code></em> to the
start of the next.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cmap</code></em>&#160;:</span></p></td>
<td>The <a class="link" href="gdk-GdkRGB.html#GdkRgbCmap"><span class="type">GdkRgbCmap</span></a> used to assign colors to the color indices.


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3127258"></a><h3>
<a name="gdk-draw-gray-image"></a>gdk_draw_gray_image ()</h3>
<a class="indexterm" name="id3127271"></a><pre class="programlisting">void                gdk_draw_gray_image                 (<a class="link" href="gdk-Drawing-Primitives.html#GdkDrawable">GdkDrawable</a> *drawable,
                                                         <a class="link" href="gdk-Graphics-Contexts.html#GdkGC">GdkGC</a> *gc,
                                                         <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#gint"
>gint</a> width,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> height,
                                                         <a class="link" href="gdk-GdkRGB.html#GdkRgbDither">GdkRgbDither</a> dith,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> *buf,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> rowstride);</pre>
<p>
Draws a grayscale image in the drawable.

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em>&#160;:</span></p></td>
<td>The <a class="link" href="gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> to draw in (usually a <a class="link" href="gdk-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a>).
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>
<td>The graphics context.
</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 top-left corner in the drawable.
</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 top-left corner in the drawable.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em>&#160;:</span></p></td>
<td>The width of the rectangle to be drawn.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em>&#160;:</span></p></td>
<td>The height of the rectangle to be drawn.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dith</code></em>&#160;:</span></p></td>
<td>A <a class="link" href="gdk-GdkRGB.html#GdkRgbDither"><span class="type">GdkRgbDither</span></a> value, selecting the desired dither mode.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buf</code></em>&#160;:</span></p></td>
<td>The pixel data, represented as 8-bit gray values.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rowstride</code></em>&#160;:</span></p></td>
<td>The number of bytes from the start of one row in <em class="parameter"><code>buf</code></em> to the
start of the next.


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3127525"></a><h3>
<a name="gdk-draw-rgb-32-image"></a>gdk_draw_rgb_32_image ()</h3>
<a class="indexterm" name="id3127539"></a><pre class="programlisting">void                gdk_draw_rgb_32_image               (<a class="link" href="gdk-Drawing-Primitives.html#GdkDrawable">GdkDrawable</a> *drawable,
                                                         <a class="link" href="gdk-Graphics-Contexts.html#GdkGC">GdkGC</a> *gc,
                                                         <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#gint"
>gint</a> width,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> height,
                                                         <a class="link" href="gdk-GdkRGB.html#GdkRgbDither">GdkRgbDither</a> dith,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> *buf,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> rowstride);</pre>
<p>
Draws a padded RGB image in the drawable. The image is stored as one
pixel per 32-bit word. It is laid out as a red byte, a green byte, a
blue byte, and a padding byte.
</p>
<p>
It's unlikely that this function will give significant performance
gains in practice. In my experience, the performance gain from having
pixels aligned to 32-bit boundaries is cancelled out by the increased
memory bandwidth.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em>&#160;:</span></p></td>
<td>The <a class="link" href="gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a> to draw in (usually a <a class="link" href="gdk-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a>).
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>
<td>The graphics context.
</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 top-left corner in the drawable.
</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 top-left corner in the drawable.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em>&#160;:</span></p></td>
<td>The width of the rectangle to be drawn.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em>&#160;:</span></p></td>
<td>The height of the rectangle to be drawn.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dith</code></em>&#160;:</span></p></td>
<td>A <a class="link" href="gdk-GdkRGB.html#GdkRgbDither"><span class="type">GdkRgbDither</span></a> value, selecting the desired dither mode.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>buf</code></em>&#160;:</span></p></td>
<td>The pixel data, represented as padded 32-bit data.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rowstride</code></em>&#160;:</span></p></td>
<td>The number of bytes from the start of one row in <em class="parameter"><code>buf</code></em> to the
start of the next.


</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3127803"></a><h3>
<a name="gdk-draw-rgb-32-image-dithalign"></a>gdk_draw_rgb_32_image_dithalign ()</h3>
<a class="indexterm" name="id3127816"></a><pre class="programlisting">void                gdk_draw_rgb_32_image_dithalign     (<a class="link" href="gdk-Drawing-Primitives.html#GdkDrawable">GdkDrawable</a> *drawable,
                                                         <a class="link" href="gdk-Graphics-Contexts.html#GdkGC">GdkGC</a> *gc,
                                                         <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#gint"
>gint</a> width,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> height,
                                                         <a class="link" href="gdk-GdkRGB.html#GdkRgbDither">GdkRgbDither</a> dith,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guchar"
>guchar</a> *buf,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> rowstride,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> xdith,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> ydith);</pre>
<p>
Like <a class="link" href="gdk-GdkRGB.html#gdk-draw-rgb-32-image"><code class="function">gdk_draw_rgb_32_image()</code></a>, but allows you to specify the dither
offsets. See <a class="link" href="gdk-GdkRGB.html#gdk-draw-rgb-image-dithalign"><code class="function">gdk_draw_rgb_image_dithalign()</code></a> for more details.</p>
<p>

</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>drawable</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Drawing-Primitives.html#GdkDrawable"><span class="type">GdkDrawable</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>