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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>Script Surfaces</title>
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<a href="#cairo-Script-Surfaces.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#cairo-Script-Surfaces.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="cairo-Script-Surfaces"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cairo-Script-Surfaces.top_of_page"></a>Script Surfaces</span></h2>
<p>Script Surfaces — Rendering to replayable scripts</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cairo-Script-Surfaces.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">#define             <a class="link" href="cairo-Script-Surfaces.html#CAIRO-HAS-SCRIPT-SURFACE:CAPS" title="CAIRO_HAS_SCRIPT_SURFACE">CAIRO_HAS_SCRIPT_SURFACE</a>
<a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="returnvalue">cairo_device_t</span></a> *    <a class="link" href="cairo-Script-Surfaces.html#cairo-script-create" title="cairo_script_create ()">cairo_script_create</a>                 (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);
<a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="returnvalue">cairo_device_t</span></a> *    <a class="link" href="cairo-Script-Surfaces.html#cairo-script-create-for-stream" title="cairo_script_create_for_stream ()">cairo_script_create_for_stream</a>      (<em class="parameter"><code><a class="link" href="cairo-PNG-Support.html#cairo-write-func-t" title="cairo_write_func_t ()"><span class="type">cairo_write_func_t</span></a> write_func</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *closure</code></em>);
<a class="link" href="cairo-Error-handling.html#cairo-status-t" title="enum cairo_status_t"><span class="returnvalue">cairo_status_t</span></a>      <a class="link" href="cairo-Script-Surfaces.html#cairo-script-from-recording-surface" title="cairo_script_from_recording_surface ()">cairo_script_from_recording_surface</a> (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <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> *recording_surface</code></em>);
<a class="link" href="cairo-Script-Surfaces.html#cairo-script-mode-t" title="enum cairo_script_mode_t"><span class="returnvalue">cairo_script_mode_t</span></a> <a class="link" href="cairo-Script-Surfaces.html#cairo-script-get-mode" title="cairo_script_get_mode ()">cairo_script_get_mode</a>               (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>);
enum                <a class="link" href="cairo-Script-Surfaces.html#cairo-script-mode-t" title="enum cairo_script_mode_t">cairo_script_mode_t</a>;
<span class="returnvalue">void</span>                <a class="link" href="cairo-Script-Surfaces.html#cairo-script-set-mode" title="cairo_script_set_mode ()">cairo_script_set_mode</a>               (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cairo-Script-Surfaces.html#cairo-script-mode-t" title="enum cairo_script_mode_t"><span class="type">cairo_script_mode_t</span></a> mode</code></em>);
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> *   <a class="link" href="cairo-Script-Surfaces.html#cairo-script-surface-create" title="cairo_script_surface_create ()">cairo_script_surface_create</a>         (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cairo-cairo-surface-t.html#cairo-content-t" title="enum cairo_content_t"><span class="type">cairo_content_t</span></a> content</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> width</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> height</code></em>);
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="returnvalue">cairo_surface_t</span></a> *   <a class="link" href="cairo-Script-Surfaces.html#cairo-script-surface-create-for-target" title="cairo_script_surface_create_for_target ()">cairo_script_surface_create_for_target</a>
                                                        (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <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> *target</code></em>);
<span class="returnvalue">void</span>                <a class="link" href="cairo-Script-Surfaces.html#cairo-script-write-comment" title="cairo_script_write_comment ()">cairo_script_write_comment</a>          (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *comment</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> len</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="cairo-Script-Surfaces.description"></a><h2>Description</h2>
<p>
The script surface provides the ability to render to a native
script that matches the cairo drawing model. The scripts can
be replayed using tools under the util/cairo-script directoriy,
or with cairo-perf-trace.
</p>
</div>
<div class="refsect1">
<a name="cairo-Script-Surfaces.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="CAIRO-HAS-SCRIPT-SURFACE:CAPS"></a><h3>CAIRO_HAS_SCRIPT_SURFACE</h3>
<pre class="programlisting">#define CAIRO_HAS_SCRIPT_SURFACE 1
</pre>
<p>
Defined if the script surface backend is available.
The script surface backend is always built in since 1.12.
</p>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-create"></a><h3>cairo_script_create ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="returnvalue">cairo_device_t</span></a> *    cairo_script_create                 (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>);</pre>
<p>
Creates a output device for emitting the script, used when
creating the individual surfaces.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>filename</code></em> :</span></p></td>
<td>the name (path) of the file to write the script to</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to the newly created device. The caller
owns the surface and should call <a class="link" href="cairo-cairo-device-t.html#cairo-device-destroy" title="cairo_device_destroy ()"><code class="function">cairo_device_destroy()</code></a> when done
with it.
This function always returns a valid pointer, but it will return a
pointer to a "nil" device if an error such as out of memory
occurs. You can use <a class="link" href="cairo-cairo-device-t.html#cairo-device-status" title="cairo_device_status ()"><code class="function">cairo_device_status()</code></a> to check for this.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-create-for-stream"></a><h3>cairo_script_create_for_stream ()</h3>
<pre class="programlisting"><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="returnvalue">cairo_device_t</span></a> *    cairo_script_create_for_stream      (<em class="parameter"><code><a class="link" href="cairo-PNG-Support.html#cairo-write-func-t" title="cairo_write_func_t ()"><span class="type">cairo_write_func_t</span></a> write_func</code></em>,
                                                         <em class="parameter"><code><span class="type">void</span> *closure</code></em>);</pre>
<p>
Creates a output device for emitting the script, used when
creating the individual surfaces.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>write_func</code></em> :</span></p></td>
<td>callback function passed the bytes written to the script</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td>
<td>user data to be passed to the callback</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to the newly created device. The caller
owns the surface and should call <a class="link" href="cairo-cairo-device-t.html#cairo-device-destroy" title="cairo_device_destroy ()"><code class="function">cairo_device_destroy()</code></a> when done
with it.
This function always returns a valid pointer, but it will return a
pointer to a "nil" device if an error such as out of memory
occurs. You can use <a class="link" href="cairo-cairo-device-t.html#cairo-device-status" title="cairo_device_status ()"><code class="function">cairo_device_status()</code></a> to check for this.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-from-recording-surface"></a><h3>cairo_script_from_recording_surface ()</h3>
<pre class="programlisting"><a class="link" href="cairo-Error-handling.html#cairo-status-t" title="enum cairo_status_t"><span class="returnvalue">cairo_status_t</span></a>      cairo_script_from_recording_surface (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <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> *recording_surface</code></em>);</pre>
<p>
Converts the record operations in <em class="parameter"><code>recording_surface</code></em> into a script.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>script</code></em> :</span></p></td>
<td>the script (output device)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>recording_surface</code></em> :</span></p></td>
<td>the recording surface to replay</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a class="link" href="cairo-Error-handling.html#CAIRO-STATUS-SUCCESS:CAPS"><span class="type">CAIRO_STATUS_SUCCESS</span></a> on successful completion or an error code.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-get-mode"></a><h3>cairo_script_get_mode ()</h3>
<pre class="programlisting"><a class="link" href="cairo-Script-Surfaces.html#cairo-script-mode-t" title="enum cairo_script_mode_t"><span class="returnvalue">cairo_script_mode_t</span></a> cairo_script_get_mode               (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>);</pre>
<p>
Queries the script for its current output mode.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>script</code></em> :</span></p></td>
<td>The script (output device) to query</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the current output mode of the script</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-mode-t"></a><h3>enum cairo_script_mode_t</h3>
<pre class="programlisting">typedef enum {
    CAIRO_SCRIPT_MODE_ASCII,
    CAIRO_SCRIPT_MODE_BINARY
} cairo_script_mode_t;
</pre>
<p>
A set of script output variants.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><a name="CAIRO-SCRIPT-MODE-ASCII:CAPS"></a><span class="term"><code class="literal">CAIRO_SCRIPT_MODE_ASCII</code></span></p></td>
<td>the output will be in readable text (default). (Since 1.12)
</td>
</tr>
<tr>
<td><p><a name="CAIRO-SCRIPT-MODE-BINARY:CAPS"></a><span class="term"><code class="literal">CAIRO_SCRIPT_MODE_BINARY</code></span></p></td>
<td>the output will use byte codes. (Since 1.12)
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-set-mode"></a><h3>cairo_script_set_mode ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cairo_script_set_mode               (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cairo-Script-Surfaces.html#cairo-script-mode-t" title="enum cairo_script_mode_t"><span class="type">cairo_script_mode_t</span></a> mode</code></em>);</pre>
<p>
Change the output mode of the script
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>script</code></em> :</span></p></td>
<td>The script (output device)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>mode</code></em> :</span></p></td>
<td>the new mode</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-surface-create"></a><h3>cairo_script_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_script_surface_create         (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <em class="parameter"><code><a class="link" href="cairo-cairo-surface-t.html#cairo-content-t" title="enum cairo_content_t"><span class="type">cairo_content_t</span></a> content</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> width</code></em>,
                                                         <em class="parameter"><code><span class="type">double</span> height</code></em>);</pre>
<p>
Create a new surface that will emit its rendering through <em class="parameter"><code>script</code></em>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>script</code></em> :</span></p></td>
<td>the script (output device)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>content</code></em> :</span></p></td>
<td>the content of the surface</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td>width in pixels</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td>height in pixels</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to the newly created surface. The caller
owns the surface and should call <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-destroy" title="cairo_surface_destroy ()"><code class="function">cairo_surface_destroy()</code></a> when done
with it.
This function always returns a valid pointer, but it will return a
pointer to a "nil" surface if an error such as out of memory
occurs. You can use <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-status" title="cairo_surface_status ()"><code class="function">cairo_surface_status()</code></a> to check for this.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-surface-create-for-target"></a><h3>cairo_script_surface_create_for_target ()</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_script_surface_create_for_target
                                                        (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <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> *target</code></em>);</pre>
<p>
Create a pxoy surface that will render to <em class="parameter"><code>target</code></em> and record
the operations to <em class="parameter"><code>device</code></em>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>script</code></em> :</span></p></td>
<td>the script (output device)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>target</code></em> :</span></p></td>
<td>a target surface to wrap</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a pointer to the newly created surface. The caller
owns the surface and should call <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-destroy" title="cairo_surface_destroy ()"><code class="function">cairo_surface_destroy()</code></a> when done
with it.
This function always returns a valid pointer, but it will return a
pointer to a "nil" surface if an error such as out of memory
occurs. You can use <a class="link" href="cairo-cairo-surface-t.html#cairo-surface-status" title="cairo_surface_status ()"><code class="function">cairo_surface_status()</code></a> to check for this.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-script-write-comment"></a><h3>cairo_script_write_comment ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                cairo_script_write_comment          (<em class="parameter"><code><a class="link" href="cairo-cairo-device-t.html#cairo-device-t" title="cairo_device_t"><span class="type">cairo_device_t</span></a> *script</code></em>,
                                                         <em class="parameter"><code>const <span class="type">char</span> *comment</code></em>,
                                                         <em class="parameter"><code><span class="type">int</span> len</code></em>);</pre>
<p>
Emit a string verbatim into the script.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>script</code></em> :</span></p></td>
<td>the script (output device)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>comment</code></em> :</span></p></td>
<td>the string to emit</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>len</code></em> :</span></p></td>
<td>the length of the sting to write, or -1 to use <code class="function">strlen()</code>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.12</p>
</div>
</div>
<div class="refsect1">
<a name="cairo-Script-Surfaces.see-also"></a><h2>See Also</h2>
<a class="link" href="cairo-cairo-surface-t.html#cairo-surface-t" title="cairo_surface_t"><span class="type">cairo_surface_t</span></a>
</div>
</div>
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