gdk-drawing-primitives.html

最新gtk中文资料集

                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> y);</pre>
<p>
Draws a point, using the foreground color and other attributes of 
the <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.</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> (a <a class="link" href="gdk-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> or a <a class="link" href="gdk-Bitmaps-and-Pixmaps.html#GdkPixmap"><span class="type">GdkPixmap</span></a>).
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</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 point.
</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 point.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3104481"></a><h3>
<a name="gdk-draw-points"></a>gdk_draw_points ()</h3>
<a class="indexterm" name="id3104494"></a><pre class="programlisting">void                gdk_draw_points                     (<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 class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkPoint">GdkPoint</a> *points,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> npoints);</pre>
<p>
Draws a number of points, using the foreground color and other 
attributes of the <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.</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> (a <a class="link" href="gdk-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> or a <a class="link" href="gdk-Bitmaps-and-Pixmaps.html#GdkPixmap"><span class="type">GdkPixmap</span></a>).
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>points</code></em>&#160;:</span></p></td>
<td> an array of <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkPoint"><span class="type">GdkPoint</span></a> structures.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>npoints</code></em>&#160;:</span></p></td>
<td> the number of points to be drawn.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3104657"></a><h3>
<a name="gdk-draw-line"></a>gdk_draw_line ()</h3>
<a class="indexterm" name="id3104670"></a><pre class="programlisting">void                gdk_draw_line                       (<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> x1_,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> y1_,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> x2_,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> y2_);</pre>
<p>
Draws a line, using the foreground color and other attributes of 
the <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.</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> (a <a class="link" href="gdk-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> or a <a class="link" href="gdk-Bitmaps-and-Pixmaps.html#GdkPixmap"><span class="type">GdkPixmap</span></a>). 
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1_</code></em>&#160;:</span></p></td>
<td> the x coordinate of the start point.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1_</code></em>&#160;:</span></p></td>
<td> the y coordinate of the start point.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x2_</code></em>&#160;:</span></p></td>
<td> the x coordinate of the end point.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y2_</code></em>&#160;:</span></p></td>
<td> the y coordinate of the end point.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3104870"></a><h3>
<a name="gdk-draw-lines"></a>gdk_draw_lines ()</h3>
<a class="indexterm" name="id3104883"></a><pre class="programlisting">void                gdk_draw_lines                      (<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 class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkPoint">GdkPoint</a> *points,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> npoints);</pre>
<p>
Draws a series of lines connecting the given points.
The way in which joins between lines are draw is determined by the
<a class="link" href="gdk-Graphics-Contexts.html#GdkCapStyle"><span class="type">GdkCapStyle</span></a> value in the <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>. This can be set with
<a class="link" href="gdk-Graphics-Contexts.html#gdk-gc-set-line-attributes"><code class="function">gdk_gc_set_line_attributes()</code></a>.</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> (a <a class="link" href="gdk-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> or a <a class="link" href="gdk-Bitmaps-and-Pixmaps.html#GdkPixmap"><span class="type">GdkPixmap</span></a>).
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>gc</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Graphics-Contexts.html#GdkGC"><span class="type">GdkGC</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>points</code></em>&#160;:</span></p></td>
<td> an array of <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkPoint"><span class="type">GdkPoint</span></a> structures specifying the endpoints of the
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>npoints</code></em>&#160;:</span></p></td>
<td> the size of the <em class="parameter"><code>points</code></em> array.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3105073"></a><h3>
<a name="gdk-draw-pixbuf"></a>gdk_draw_pixbuf ()</h3>
<a class="indexterm" name="id3105088"></a><pre class="programlisting">void                gdk_draw_pixbuf                     (<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/gdk-pixbuf/gdk-pixbuf-gdk-pixbuf.html#GdkPixbuf"
>GdkPixbuf</a> *pixbuf,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> src_x,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> src_y,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> dest_x,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> dest_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> dither,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> x_dither,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> y_dither);</pre>
<p>
Renders a rectangular portion of a pixbuf to a drawable.  The destination
drawable must have a colormap. All windows have a colormap, however, pixmaps
only have colormap by default if they were created with a non-<a
href="/usr/share/gtk-doc/html/liboil/liboil-liboiljunk.html#NULL:CAPS"
><code class="literal">NULL</code></a> window 
argument. Otherwise a colormap must be set on them with 
<a class="link" href="gdk-Drawing-Primitives.html#gdk-drawable-set-colormap"><code class="function">gdk_drawable_set_colormap()</code></a>.
</p>
<p>
On older X servers, rendering pixbufs with an alpha channel involves round 
trips to the X server, and may be somewhat slow.
</p>
<p>
The clip mask of <em class="parameter"><code>gc</code></em> is ignored, but clip rectangles and clip regions work
fine.
</p>
<p>
If GDK is built with the Sun mediaLib library, the gdk_draw_pixbuf
function is accelerated using mediaLib, which provides hardware
acceleration on Intel, AMD, and Sparc chipsets.  If desired, mediaLib
support ca