gdk-points-rectangles-and-regions.html

最新gtk中文资料集

<a name="gdk-region-union-with-rect"></a>gdk_region_union_with_rect ()</h3>
<a class="indexterm" name="id3082082"></a><pre class="programlisting">void                gdk_region_union_with_rect          (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRectangle">GdkRectangle</a> *rect);</pre>
<p>
Sets the area of <em class="parameter"><code>region</code></em> to the union of the areas of <em class="parameter"><code>region</code></em> and
<em class="parameter"><code>rect</code></em>. The resulting area is the set of pixels contained in
either <em class="parameter"><code>region</code></em> or <em class="parameter"><code>rect</code></em>.</p>
<p>

</p>
<div class="variablelist"><table border="0">
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<td><p><span class="term"><em class="parameter"><code>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rect</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRectangle"><span class="type">GdkRectangle</span></a>.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3082200"></a><h3>
<a name="gdk-region-intersect"></a>gdk_region_intersect ()</h3>
<a class="indexterm" name="id3082213"></a><pre class="programlisting">void                gdk_region_intersect                (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source1,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source2);</pre>
<p>
Sets the area of <em class="parameter"><code>source1</code></em> to the intersection of the areas of <em class="parameter"><code>source1</code></em>
and <em class="parameter"><code>source2</code></em>. The resulting area is the set of pixels contained in
both <em class="parameter"><code>source1</code></em> and <em class="parameter"><code>source2</code></em>.</p>
<p>
</p>
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<td><p><span class="term"><em class="parameter"><code>source1</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>source2</code></em>&#160;:</span></p></td>
<td> another <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3082332"></a><h3>
<a name="gdk-region-union"></a>gdk_region_union ()</h3>
<a class="indexterm" name="id3082344"></a><pre class="programlisting">void                gdk_region_union                    (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source1,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source2);</pre>
<p>
Sets the area of <em class="parameter"><code>source1</code></em> to the union of the areas of <em class="parameter"><code>source1</code></em> and
<em class="parameter"><code>source2</code></em>. The resulting area is the set of pixels contained in
either <em class="parameter"><code>source1</code></em> or <em class="parameter"><code>source2</code></em>.</p>
<p>

</p>
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<td><p><span class="term"><em class="parameter"><code>source1</code></em>&#160;:</span></p></td>
<td>  a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>source2</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a> 
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3082462"></a><h3>
<a name="gdk-region-subtract"></a>gdk_region_subtract ()</h3>
<a class="indexterm" name="id3082475"></a><pre class="programlisting">void                gdk_region_subtract                 (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source1,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source2);</pre>
<p>
Subtracts the area of <em class="parameter"><code>source2</code></em> from the area <em class="parameter"><code>source1</code></em>. The resulting
area is the set of pixels contained in <em class="parameter"><code>source1</code></em> but not in <em class="parameter"><code>source2</code></em>.</p>
<p>
</p>
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<td><p><span class="term"><em class="parameter"><code>source1</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>source2</code></em>&#160;:</span></p></td>
<td> another <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3082587"></a><h3>
<a name="gdk-region-xor"></a>gdk_region_xor ()</h3>
<a class="indexterm" name="id3082599"></a><pre class="programlisting">void                gdk_region_xor                      (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source1,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *source2);</pre>
<p>
Sets the area of <em class="parameter"><code>source1</code></em> to the exclusive-OR of the areas of <em class="parameter"><code>source1</code></em>
and <em class="parameter"><code>source2</code></em>. The resulting area is the set of pixels contained in one
or the other of the two sources but not in both.</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>source1</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>source2</code></em>&#160;:</span></p></td>
<td> another <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3082706"></a><h3>
<a name="GdkSpan"></a>GdkSpan</h3>
<a class="indexterm" name="id3082718"></a><pre class="programlisting">typedef struct {
  gint x;
  gint y;
  gint width;
} GdkSpan;
</pre>
<p>
A GdkSpan represents a horizontal line of pixels starting
at the pixel with coordinates <em class="parameter"><code>x</code></em>, <em class="parameter"><code>y</code></em> and ending before <em class="parameter"><code>x</code></em> + <em class="parameter"><code>width</code></em>, <em class="parameter"><code>y</code></em>.
</p>
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<td><p><span class="term"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a>&#160;<em class="structfield"><code>x</code></em>;</span></p></td>
<td>x coordinate of the first pixel.
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a>&#160;<em class="structfield"><code>y</code></em>;</span></p></td>
<td>y coordinate of the first pixel.
</td>
</tr>
<tr>
<td><p><span class="term"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a>&#160;<em class="structfield"><code>width</code></em>;</span></p></td>
<td>number of pixels in the span.

</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id3082830"></a><h3>
<a name="GdkSpanFunc"></a>GdkSpanFunc ()</h3>
<a class="indexterm" name="id3082842"></a><pre class="programlisting">void                (*GdkSpanFunc)                      (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkSpan">GdkSpan</a> *span,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);</pre>
<p>
This defines the type of the function passed to 
<a class="link" href="gdk-Points-Rectangles-and-Regions.html#gdk-region-spans-intersect-foreach"><code class="function">gdk_region_spans_intersect_foreach()</code></a>. 
</p>
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<td><p><span class="term"><em class="parameter"><code>span</code></em>&#160;:</span></p></td>
<td>a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkSpan"><span class="type">GdkSpan</span></a>.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em>&#160;:</span></p></td>
<td>the user data passed to <a class="link" href="gdk-Points-Rectangles-and-Regions.html#gdk-region-spans-intersect-foreach"><code class="function">gdk_region_spans_intersect_foreach()</code></a>.


</td>
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<hr>
<div class="refsect2" lang="en">
<a name="id3082942"></a><h3>
<a name="gdk-region-spans-intersect-foreach"></a>gdk_region_spans_intersect_foreach ()</h3>
<a class="indexterm" name="id3082955"></a><pre class="programlisting">void                gdk_region_spans_intersect_foreach  (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkSpan">GdkSpan</a> *spans,
                                                         int n_spans,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a> sorted,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkSpanFunc">GdkSpanFunc</a> function,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);</pre>
<p>
Calls a function on each span in the intersection of <em class="parameter"><code>region</code></em> and <em class="parameter"><code>spans</code></em>.</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>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>spans</code></em>&#160;:</span></p></td>
<td> an array of <span class="type">GdkSpans</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n_spans</code></em>&#160;:</span></p></td>
<td> the length of <em class="parameter"><code>spans</code></em>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>sorted</code></em>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if <em class="parameter"><code>spans</code></em> is sorted wrt. the y coordinate
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>function</code></em>&#160;:</span></p></td>
<td> function to call on each span in the intersection
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>data</code></em>&#160;:</span></p></td>
<td> data to pass to <em class="parameter"><code>function</code></em>
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1" lang="en">
<a name="id3083170"></a><div class="refsect2" lang="en"><a name="id3083172"></a></div>
<hr>
<div class="refsect2" lang="en"><a name="id3083173"></a></div>
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