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<a name="libgimpwidgets-GimpCairoUtils"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="libgimpwidgets-GimpCairoUtils.top_of_page"></a>gimpcairo-utils</span></h2>
<p>gimpcairo-utils</p>
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<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="libgimpwidgets-GimpCairoUtils.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"><span class="returnvalue">void</span> <a class="link" href="libgimpwidgets-GimpCairoUtils.html#gimp-cairo-set-source-rgb" title="gimp_cairo_set_source_rgb ()">gimp_cairo_set_source_rgb</a> (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *color</code></em>);
<span class="returnvalue">void</span> <a class="link" href="libgimpwidgets-GimpCairoUtils.html#gimp-cairo-set-source-rgba" title="gimp_cairo_set_source_rgba ()">gimp_cairo_set_source_rgba</a> (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *color</code></em>);
<span class="returnvalue">gboolean</span> <a class="link" href="libgimpwidgets-GimpCairoUtils.html#gimp-cairo-set-focus-line-pattern" title="gimp_cairo_set_focus_line_pattern ()">gimp_cairo_set_focus_line_pattern</a> (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code><span class="type">GtkWidget</span> *widget</code></em>);
<span class="returnvalue">cairo_pattern_t</span> * <a class="link" href="libgimpwidgets-GimpCairoUtils.html#gimp-cairo-checkerboard-create" title="gimp_cairo_checkerboard_create ()">gimp_cairo_checkerboard_create</a> (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code><span class="type">gint</span> size</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *light</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *dark</code></em>);
<span class="returnvalue">cairo_surface_t</span> * <a class="link" href="libgimpwidgets-GimpCairoUtils.html#gimp-cairo-surface-create-from-pixbuf" title="gimp_cairo_surface_create_from_pixbuf ()">gimp_cairo_surface_create_from_pixbuf</a>
(<em class="parameter"><code><span class="type">GdkPixbuf</span> *pixbuf</code></em>);
#define <a class="link" href="libgimpwidgets-GimpCairoUtils.html#GIMP-CAIRO-RGB24-SET-PIXEL:CAPS" title="GIMP_CAIRO_RGB24_SET_PIXEL()">GIMP_CAIRO_RGB24_SET_PIXEL</a> (d,
r,
g,
b)
#define <a class="link" href="libgimpwidgets-GimpCairoUtils.html#GIMP-CAIRO-ARGB32-SET-PIXEL:CAPS" title="GIMP_CAIRO_ARGB32_SET_PIXEL()">GIMP_CAIRO_ARGB32_SET_PIXEL</a> (d,
r,
g,
b,
a)
</pre>
</div>
<div class="refsect1">
<a name="libgimpwidgets-GimpCairoUtils.description"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1">
<a name="libgimpwidgets-GimpCairoUtils.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="gimp-cairo-set-source-rgb"></a><h3>gimp_cairo_set_source_rgb ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_cairo_set_source_rgb (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *color</code></em>);</pre>
<p>
Sets the source pattern within <em class="parameter"><code>cr</code></em> to the solid opaque color
described by <em class="parameter"><code>color</code></em>.
</p>
<p>
This function calls <code class="function">cairo_set_source_rgb()</code> for you.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>cr</code></em> :</span></p></td>
<td>Cairo context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>GimpRGB color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since GIMP 2.6</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-cairo-set-source-rgba"></a><h3>gimp_cairo_set_source_rgba ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gimp_cairo_set_source_rgba (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *color</code></em>);</pre>
<p>
Sets the source pattern within <em class="parameter"><code>cr</code></em> to the solid translucent color
described by <em class="parameter"><code>color</code></em>.
</p>
<p>
This function calls <code class="function">cairo_set_source_rgba()</code> for you.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>cr</code></em> :</span></p></td>
<td>Cairo context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td>GimpRGB color</td>
</tr>
</tbody>
</table></div>
<p class="since">Since GIMP 2.6</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-cairo-set-focus-line-pattern"></a><h3>gimp_cairo_set_focus_line_pattern ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span> gimp_cairo_set_focus_line_pattern (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code><span class="type">GtkWidget</span> *widget</code></em>);</pre>
<p>
Sets color and dash pattern for stroking a focus line on the given
<em class="parameter"><code>cr</code></em>. The line pattern is taken from <em class="parameter"><code>widget</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>cr</code></em> :</span></p></td>
<td>Cairo context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>widget</code></em> :</span></p></td>
<td>widget to draw the focus indicator on</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<code class="literal">TRUE</code> if the widget style has a focus line pattern,
<code class="literal">FALSE</code> otherwise</td>
</tr>
</tbody>
</table></div>
<p class="since">Since GIMP 2.6</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-cairo-checkerboard-create"></a><h3>gimp_cairo_checkerboard_create ()</h3>
<pre class="programlisting"><span class="returnvalue">cairo_pattern_t</span> * gimp_cairo_checkerboard_create (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
<em class="parameter"><code><span class="type">gint</span> size</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *light</code></em>,
<em class="parameter"><code>const <a href="../libgimpcolor/libgimpcolor-GimpRGB.html#GimpRGB"><span class="type">GimpRGB</span></a> *dark</code></em>);</pre>
<p>
Create a repeating checkerboard pattern.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>cr</code></em> :</span></p></td>
<td>Cairo context</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>size</code></em> :</span></p></td>
<td>check size</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>light</code></em> :</span></p></td>
<td>light check color or <code class="literal">NULL</code> to use the default light gray</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dark</code></em> :</span></p></td>
<td>dark check color or <code class="literal">NULL</code> to use the default dark gray</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new Cairo pattern that can be used as a source on <em class="parameter"><code>cr</code></em>.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since GIMP 2.6</p>
</div>
<hr>
<div class="refsect2">
<a name="gimp-cairo-surface-create-from-pixbuf"></a><h3>gimp_cairo_surface_create_from_pixbuf ()</h3>
<pre class="programlisting"><span class="returnvalue">cairo_surface_t</span> * gimp_cairo_surface_create_from_pixbuf
(<em class="parameter"><code><span class="type">GdkPixbuf</span> *pixbuf</code></em>);</pre>
<p>
Create a Cairo image surface from a GdkPixbuf.
</p>
<p>
You should avoid calling this function as there are probably more
efficient ways of achieving the result you are looking for.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>pixbuf</code></em> :</span></p></td>
<td>a GdkPixbuf</td>
</tr></tbody>
</table></div>
<p class="since">Since GIMP 2.6</p>
</div>
<hr>
<div class="refsect2">
<a name="GIMP-CAIRO-RGB24-SET-PIXEL:CAPS"></a><h3>GIMP_CAIRO_RGB24_SET_PIXEL()</h3>
<pre class="programlisting">#define GIMP_CAIRO_RGB24_SET_PIXEL(d, r, g, b)</pre>
<p>
Sets a single pixel in an Cairo image surface in <code class="literal">CAIRO_FORMAT_RGB24</code>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>d</code></em> :</span></p></td>
<td>pointer to the destination buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>r</code></em> :</span></p></td>
<td>red component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>g</code></em> :</span></p></td>
<td>green component</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>b</code></em> :</span></p></td>
<td>blue component</td>
</tr>
</tbody>
</table></div>
<p class="since">Since GIMP 2.6</p>
</div>
<hr>
<div class="refsect2">
<a name="GIMP-CAIRO-ARGB32-SET-PIXEL:CAPS"></a><h3>GIMP_CAIRO_ARGB32_SET_PIXEL()</h3>
<pre class="programlisting">#define GIMP_CAIRO_ARGB32_SET_PIXEL(d, r, g, b, a)</pre>
<p>
Sets a single pixel in an Cairo image surface in <code class="literal">CAIRO_FORMAT_ARGB32</code>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>d</code></em> :</span></p></td>
<td>pointer to the destination buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>r</code></em> :</span></p></td>
<td>red component, not pre-multiplied</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>g</code></em> :</span></p></td>
<td>green component, not pre-multiplied</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>b</code></em> :</span></p></td>
<td>blue component, not pre-multiplied</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>a</code></em> :</span></p></td>
<td>alpha component</td>
</tr>
</tbody>
</table></div>
<p class="since">Since GIMP 2.6</p>
</div>
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