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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Quartz Surfaces: Cairo: A Vector Graphics Library</title>
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<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#cairo-Quartz-Surfaces.description" class="shortcut">Description</a></span>
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<div class="refentry">
<a name="cairo-Quartz-Surfaces"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cairo-Quartz-Surfaces.top_of_page"></a>Quartz Surfaces</span></h2>
<p>Quartz Surfaces — Rendering to Quartz surfaces</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="cairo-Quartz-Surfaces.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="cairo-Quartz-Surfaces.html#cairo-quartz-surface-create" title="cairo_quartz_surface_create ()">cairo_quartz_surface_create</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> *
</td>
<td class="function_name">
<a class="link" href="cairo-Quartz-Surfaces.html#cairo-quartz-surface-create-for-cg-context" title="cairo_quartz_surface_create_for_cg_context ()">cairo_quartz_surface_create_for_cg_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">CGContextRef</span>
</td>
<td class="function_name">
<a class="link" href="cairo-Quartz-Surfaces.html#cairo-quartz-surface-get-cg-context" title="cairo_quartz_surface_get_cg_context ()">cairo_quartz_surface_get_cg_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cairo-Quartz-Surfaces.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="cairo-Quartz-Surfaces.html#CAIRO-HAS-QUARTZ-SURFACE:CAPS" title="CAIRO_HAS_QUARTZ_SURFACE">CAIRO_HAS_QUARTZ_SURFACE</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cairo-Quartz-Surfaces.description"></a><h2>Description</h2>
<p>The Quartz surface is used to render cairo graphics targeting the
Apple OS X Quartz rendering system.</p>
</div>
<div class="refsect1">
<a name="cairo-Quartz-Surfaces.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="cairo-quartz-surface-create"></a><h3>cairo_quartz_surface_create ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> *
cairo_quartz_surface_create (<em class="parameter"><code><a class="link" href="cairo-Image-Surfaces.html#cairo-format-t" title="enum cairo_format_t"><span class="type">cairo_format_t</span></a> format</code></em>,
                             <em class="parameter"><code>unsigned <span class="type">int</span> width</code></em>,
                             <em class="parameter"><code>unsigned <span class="type">int</span> height</code></em>);</pre>
<p>Creates a Quartz surface backed by a CGBitmap.  The surface is
created using the Device RGB (or Device Gray, for A8) color space.
All Cairo operations, including those that require software
rendering, will succeed on this surface.</p>
<div class="refsect3">
<a name="cairo-quartz-surface-create.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>format of pixels in the surface to create</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>width of the surface, in pixels</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>height of the surface, in pixels</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cairo-quartz-surface-create.returns"></a><h4>Returns</h4>
<p> the newly created surface.</p>
</div>
<p class="since">Since: 1.6</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-quartz-surface-create-for-cg-context"></a><h3>cairo_quartz_surface_create_for_cg_context ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> *
cairo_quartz_surface_create_for_cg_context
                               (<em class="parameter"><code><span class="type">CGContextRef</span> cgContext</code></em>,
                                <em class="parameter"><code>unsigned <span class="type">int</span> width</code></em>,
                                <em class="parameter"><code>unsigned <span class="type">int</span> height</code></em>);</pre>
<p>Creates a Quartz surface that wraps the given CGContext.  The
CGContext is assumed to be in the standard Cairo coordinate space
(that is, with the origin at the upper left and the Y axis
increasing downward).  If the CGContext is in the Quartz coordinate
space (with the origin at the bottom left), then it should be
flipped before this function is called.  The flip can be accomplished
using a translate and a scale; for example:</p>
<div class="informalexample"><pre class="programlisting">
CGContextTranslateCTM (cgContext, 0.0, height);
CGContextScaleCTM (cgContext, 1.0, -1.0);
</pre></div>
<p>All Cairo operations are implemented in terms of Quartz operations,
as long as Quartz-compatible elements are used (such as Quartz fonts).</p>
<div class="refsect3">
<a name="cairo-quartz-surface-create-for-cg-context.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>cgContext</p></td>
<td class="parameter_description"><p>the existing CGContext for which to create the surface</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>width of the surface, in pixels</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>height of the surface, in pixels</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cairo-quartz-surface-create-for-cg-context.returns"></a><h4>Returns</h4>
<p> the newly created Cairo surface.</p>
</div>
<p class="since">Since: 1.6</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-quartz-surface-get-cg-context"></a><h3>cairo_quartz_surface_get_cg_context ()</h3>
<pre class="programlisting"><span class="returnvalue">CGContextRef</span>
cairo_quartz_surface_get_cg_context (<em class="parameter"><code><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a> *surface</code></em>);</pre>
<p>Returns the CGContextRef that the given Quartz surface is backed
by.</p>
<p>A call to <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-flush" title="cairo_surface_flush ()"><code class="function">cairo_surface_flush()</code></a> is required before using the
CGContextRef to ensure that all pending drawing operations are
finished and to restore any temporary modification cairo has made
to its state. A call to <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-mark-dirty" title="cairo_surface_mark_dirty ()"><code class="function">cairo_surface_mark_dirty()</code></a> is required
after the state or the content of the CGContextRef has been
modified.</p>
<div class="refsect3">
<a name="cairo-quartz-surface-get-cg-context.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>surface</p></td>
<td class="parameter_description"><p>the Cairo Quartz surface</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cairo-quartz-surface-get-cg-context.returns"></a><h4>Returns</h4>
<p> the CGContextRef for the given surface.</p>
</div>
<p class="since">Since: 1.6</p>
</div>
</div>
<div class="refsect1">
<a name="cairo-Quartz-Surfaces.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="CAIRO-HAS-QUARTZ-SURFACE:CAPS"></a><h3>CAIRO_HAS_QUARTZ_SURFACE</h3>
<pre class="programlisting">#define CAIRO_HAS_QUARTZ_SURFACE 1
</pre>
<p>Defined if the Quartz surface backend is available.
This macro can be used to conditionally compile backend-specific code.</p>
<p class="since">Since: 1.6</p>
</div>
</div>
<div class="refsect1">
<a name="cairo-Quartz-Surfaces.see-also"></a><h2>See Also</h2>
<p><a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a></p>
</div>
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