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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>PDF Surfaces: Cairo: A Vector Graphics Library</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="Cairo: A Vector Graphics Library">
<link rel="up" href="cairo-surfaces.html" title="Surfaces">
<link rel="prev" href="cairo-Image-Surfaces.html" title="Image Surfaces">
<link rel="next" href="cairo-PNG-Support.html" title="PNG Support">
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</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#cairo-PDF-Surfaces.description" class="shortcut">Description</a></span>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
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</tr></table>
<div class="refentry">
<a name="cairo-PDF-Surfaces"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cairo-PDF-Surfaces.top_of_page"></a>PDF Surfaces</span></h2>
<p>PDF Surfaces — Rendering PDF documents</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="cairo-PDF-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-PDF-Surfaces.html#cairo-pdf-surface-create" title="cairo_pdf_surface_create ()">cairo_pdf_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-PDF-Surfaces.html#cairo-pdf-surface-create-for-stream" title="cairo_pdf_surface_create_for_stream ()">cairo_pdf_surface_create_for_stream</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-restrict-to-version" title="cairo_pdf_surface_restrict_to_version ()">cairo_pdf_surface_restrict_to_version</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-get-versions" title="cairo_pdf_get_versions ()">cairo_pdf_get_versions</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-version-to-string" title="cairo_pdf_version_to_string ()">cairo_pdf_version_to_string</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-set-size" title="cairo_pdf_surface_set_size ()">cairo_pdf_surface_set_size</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">int</span>
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-add-outline" title="cairo_pdf_surface_add_outline ()">cairo_pdf_surface_add_outline</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-set-metadata" title="cairo_pdf_surface_set_metadata ()">cairo_pdf_surface_set_metadata</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-set-page-label" title="cairo_pdf_surface_set_page_label ()">cairo_pdf_surface_set_page_label</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-set-thumbnail-size" title="cairo_pdf_surface_set_thumbnail_size ()">cairo_pdf_surface_set_thumbnail_size</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cairo-PDF-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-PDF-Surfaces.html#CAIRO-HAS-PDF-SURFACE:CAPS" title="CAIRO_HAS_PDF_SURFACE">CAIRO_HAS_PDF_SURFACE</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="cairo-PDF-Surfaces.html#CAIRO-PDF-OUTLINE-ROOT:CAPS" title="CAIRO_PDF_OUTLINE_ROOT">CAIRO_PDF_OUTLINE_ROOT</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-outline-flags-t" title="enum cairo_pdf_outline_flags_t">cairo_pdf_outline_flags_t</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-metadata-t" title="enum cairo_pdf_metadata_t">cairo_pdf_metadata_t</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-version-t" title="enum cairo_pdf_version_t">cairo_pdf_version_t</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="cairo-PDF-Surfaces.description"></a><h2>Description</h2>
<p>The PDF surface is used to render cairo graphics to Adobe
PDF files and is a multi-page vector surface backend.</p>
<p>The following mime types are supported: <a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JPEG:CAPS" title="CAIRO_MIME_TYPE_JPEG"><code class="literal">CAIRO_MIME_TYPE_JPEG</code></a>,
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JP2:CAPS" title="CAIRO_MIME_TYPE_JP2"><code class="literal">CAIRO_MIME_TYPE_JP2</code></a>, <a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-UNIQUE-ID:CAPS" title="CAIRO_MIME_TYPE_UNIQUE_ID"><code class="literal">CAIRO_MIME_TYPE_UNIQUE_ID</code></a>,
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2:CAPS" title="CAIRO_MIME_TYPE_JBIG2"><code class="literal">CAIRO_MIME_TYPE_JBIG2</code></a>, <a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2-GLOBAL:CAPS" title="CAIRO_MIME_TYPE_JBIG2_GLOBAL"><code class="literal">CAIRO_MIME_TYPE_JBIG2_GLOBAL</code></a>,
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2-GLOBAL-ID:CAPS" title="CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID"><code class="literal">CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID</code></a>,
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-CCITT-FAX:CAPS" title="CAIRO_MIME_TYPE_CCITT_FAX"><code class="literal">CAIRO_MIME_TYPE_CCITT_FAX</code></a>, <a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-CCITT-FAX-PARAMS:CAPS" title="CAIRO_MIME_TYPE_CCITT_FAX_PARAMS"><code class="literal">CAIRO_MIME_TYPE_CCITT_FAX_PARAMS</code></a>.</p>
<div class="refsect2">
<a name="id-1.5.5.5.4"></a><h3>JBIG2 Images</h3>
<p>JBIG2 data in PDF must be in the embedded format as described in
ISO/IEC 11544. Image specific JBIG2 data must be in
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2:CAPS" title="CAIRO_MIME_TYPE_JBIG2"><code class="literal">CAIRO_MIME_TYPE_JBIG2</code></a>.  Any global segments in the JBIG2 data
(segments with page association field set to 0) must be in
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2-GLOBAL:CAPS" title="CAIRO_MIME_TYPE_JBIG2_GLOBAL"><code class="literal">CAIRO_MIME_TYPE_JBIG2_GLOBAL</code></a>. The global data may be shared by
multiple images. All images sharing the same global data must set
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2-GLOBAL-ID:CAPS" title="CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID"><code class="literal">CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID</code></a> to a unique identifier. At least
one of the images must provide the global data using
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2-GLOBAL:CAPS" title="CAIRO_MIME_TYPE_JBIG2_GLOBAL"><code class="literal">CAIRO_MIME_TYPE_JBIG2_GLOBAL</code></a>. The global data will only be
embedded once and shared by all JBIG2 images with the same
<a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-JBIG2-GLOBAL-ID:CAPS" title="CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID"><code class="literal">CAIRO_MIME_TYPE_JBIG2_GLOBAL_ID</code></a>.</p>
</div>
<hr>
<div class="refsect2">
<a name="ccitt"></a><h3>CCITT Fax Images</h3>
<p>The <a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-CCITT-FAX:CAPS" title="CAIRO_MIME_TYPE_CCITT_FAX"><code class="literal">CAIRO_MIME_TYPE_CCITT_FAX</code></a> mime data requires a number of decoding
parameters These parameters are specified using <a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-CCITT-FAX-PARAMS:CAPS" title="CAIRO_MIME_TYPE_CCITT_FAX_PARAMS"><code class="literal">CAIRO_MIME_TYPE_CCITT_FAX_PARAMS</code></a>.</p>
<p><a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-CCITT-FAX-PARAMS:CAPS" title="CAIRO_MIME_TYPE_CCITT_FAX_PARAMS"><code class="literal">CAIRO_MIME_TYPE_CCITT_FAX_PARAMS</code></a> mime data must contain a string of the form
"param1=value1 param2=value2 ...".</p>
<p><em class="parameter"><code>Columns</code></em>
: [required] An integer specifying the width of the image in pixels.</p>
<p><em class="parameter"><code>Rows</code></em>
: [required] An integer specifying the height of the image in scan lines.</p>
<p><em class="parameter"><code>K</code></em>
: [optional] An integer identifying the encoding scheme used. &lt; 0
is 2 dimensional Group 4, = 0 is Group3 1 dimensional, &gt; 0 is mixed 1
and 2 dimensional encoding. Default is 0.</p>
<p><em class="parameter"><code>EndOfLine</code></em>
: [optional] If true end-of-line bit patterns are present. Default is false.</p>
<p><em class="parameter"><code>EncodedByteAlign</code></em>
: [optional] If true the end of line is padded
with 0 bits so the next line begins on a byte boundary. Default is false.</p>
<p><em class="parameter"><code>EndOfBlock</code></em>
: [optional] If true the data contains an end-of-block pattern. Default is true.</p>
<p><em class="parameter"><code>BlackIs1</code></em>
: [optional] If true 1 bits are black pixels. Default is false.</p>
<p><em class="parameter"><code>DamagedRowsBeforeError</code></em>
: [optional] An integer specifying the
number of damages rows tolerated before an error occurs. Default is 0.</p>
<p>Boolean values may be "true" or "false", or 1 or 0.</p>
<p>These parameters are the same as the CCITTFaxDecode parameters in the
<a class="ulink" href="https://www.adobe.com/products/postscript/pdfs/PLRM.pdf" target="_top">PostScript Language Reference</a>
and <a class="ulink" href="https://www.adobe.com/content/dam/Adobe/en/devnet/pdf/pdfs/PDF32000_2008.pdf" target="_top">Portable Document Format (PDF)</a>.
Refer to these documents for further details.</p>
<p>An example <a class="link" href="cairo-cairo-surface-t.html#CAIRO-MIME-TYPE-CCITT-FAX-PARAMS:CAPS" title="CAIRO_MIME_TYPE_CCITT_FAX_PARAMS"><code class="literal">CAIRO_MIME_TYPE_CCITT_FAX_PARAMS</code></a> string is:</p>
<pre class="programlisting">
"Columns=10230 Rows=40000 K=1 EndOfLine=true EncodedByteAlign=1 BlackIs1=false"
</pre>
</div>
</div>
<div class="refsect1">
<a name="cairo-PDF-Surfaces.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="cairo-pdf-surface-create"></a><h3>cairo_pdf_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_pdf_surface_create (<em class="parameter"><code>const <span class="type">char</span> *filename</code></em>,
                          <em class="parameter"><code><span class="type">double</span> width_in_points</code></em>,
                          <em class="parameter"><code><span class="type">double</span> height_in_points</code></em>);</pre>
<p>Creates a PDF surface of the specified size in points to be written
to <em class="parameter"><code>filename</code></em>
.</p>
<div class="refsect3">
<a name="cairo-pdf-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>filename</p></td>
<td class="parameter_description"><p>a filename for the PDF output (must be writable), <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> may be
used to specify no output. This will generate a PDF surface that
may be queried and used as a source, without generating a
temporary file.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width_in_points</p></td>
<td class="parameter_description"><p>width of the surface, in points (1 point == 1/72.0 inch)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height_in_points</p></td>
<td class="parameter_description"><p>height of the surface, in points (1 point == 1/72.0 inch)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cairo-pdf-surface-create.returns"></a><h4>Returns</h4>
<p> 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.</p>
<p>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.</p>
</div>
<p class="since">Since: 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-surface-create-for-stream"></a><h3>cairo_pdf_surface_create_for_stream ()</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_pdf_surface_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>,
                                     <em class="parameter"><code><span class="type">double</span> width_in_points</code></em>,
                                     <em class="parameter"><code><span class="type">double</span> height_in_points</code></em>);</pre>
<p>Creates a PDF surface of the specified size in points to be written
incrementally to the stream represented by <em class="parameter"><code>write_func</code></em>
 and <em class="parameter"><code>closure</code></em>
.</p>
<div class="refsect3">
<a name="cairo-pdf-surface-create-for-stream.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>write_func</p></td>
<td class="parameter_description"><p>a <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> to accept the output data, may be <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
to indicate a no-op <em class="parameter"><code>write_func</code></em>
. With a no-op <em class="parameter"><code>write_func</code></em>
,
the surface may be queried or used as a source without
generating any temporary files.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>closure</p></td>
<td class="parameter_description"><p>the closure argument for <em class="parameter"><code>write_func</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width_in_points</p></td>
<td class="parameter_description"><p>width of the surface, in points (1 point == 1/72.0 inch)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height_in_points</p></td>
<td class="parameter_description"><p>height of the surface, in points (1 point == 1/72.0 inch)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cairo-pdf-surface-create-for-stream.returns"></a><h4>Returns</h4>
<p> 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.</p>
<p>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.</p>
</div>
<p class="since">Since: 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-surface-restrict-to-version"></a><h3>cairo_pdf_surface_restrict_to_version ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cairo_pdf_surface_restrict_to_version (<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>,
                                       <em class="parameter"><code><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-version-t" title="enum cairo_pdf_version_t"><span class="type">cairo_pdf_version_t</span></a> version</code></em>);</pre>
<p>Restricts the generated PDF file to <em class="parameter"><code>version</code></em>
. See <a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-get-versions" title="cairo_pdf_get_versions ()"><code class="function">cairo_pdf_get_versions()</code></a>
for a list of available version values that can be used here.</p>
<p>This function should only be called before any drawing operations
have been performed on the given surface. The simplest way to do
this is to call this function immediately after creating the
surface.</p>
<div class="refsect3">
<a name="cairo-pdf-surface-restrict-to-version.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>a PDF <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></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>version</p></td>
<td class="parameter_description"><p>PDF version</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.10</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-get-versions"></a><h3>cairo_pdf_get_versions ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cairo_pdf_get_versions (<em class="parameter"><code><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-version-t" title="enum cairo_pdf_version_t"><span class="type">cairo_pdf_version_t</span></a> const **versions</code></em>,
                        <em class="parameter"><code><span class="type">int</span> *num_versions</code></em>);</pre>
<p>Used to retrieve the list of supported versions. See
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-restrict-to-version" title="cairo_pdf_surface_restrict_to_version ()"><code class="function">cairo_pdf_surface_restrict_to_version()</code></a>.</p>
<div class="refsect3">
<a name="cairo-pdf-get-versions.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>versions</p></td>
<td class="parameter_description"><p>supported version list</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>num_versions</p></td>
<td class="parameter_description"><p>list length</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.10</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-version-to-string"></a><h3>cairo_pdf_version_to_string ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
cairo_pdf_version_to_string (<em class="parameter"><code><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-version-t" title="enum cairo_pdf_version_t"><span class="type">cairo_pdf_version_t</span></a> version</code></em>);</pre>
<p>Get the string representation of the given <em class="parameter"><code>version</code></em>
 id. This function
will return <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if <em class="parameter"><code>version</code></em>
 isn't valid. See <a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-get-versions" title="cairo_pdf_get_versions ()"><code class="function">cairo_pdf_get_versions()</code></a>
for a way to get the list of valid version ids.</p>
<div class="refsect3">
<a name="cairo-pdf-version-to-string.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>version</p></td>
<td class="parameter_description"><p>a version id</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cairo-pdf-version-to-string.returns"></a><h4>Returns</h4>
<p> the string associated to given version.</p>
</div>
<p class="since">Since: 1.10</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-surface-set-size"></a><h3>cairo_pdf_surface_set_size ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cairo_pdf_surface_set_size (<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>,
                            <em class="parameter"><code><span class="type">double</span> width_in_points</code></em>,
                            <em class="parameter"><code><span class="type">double</span> height_in_points</code></em>);</pre>
<p>Changes the size of a PDF surface for the current (and
subsequent) pages.</p>
<p>This function should only be called before any drawing operations
have been performed on the current page. The simplest way to do
this is to call this function immediately after creating the
surface or immediately after completing a page with either
<a class="link" href="cairo-cairo-t.html#cairo-show-page" title="cairo_show_page ()"><code class="function">cairo_show_page()</code></a> or <a class="link" href="cairo-cairo-t.html#cairo-copy-page" title="cairo_copy_page ()"><code class="function">cairo_copy_page()</code></a>.</p>
<div class="refsect3">
<a name="cairo-pdf-surface-set-size.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>a PDF <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></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width_in_points</p></td>
<td class="parameter_description"><p>new surface width, in points (1 point == 1/72.0 inch)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height_in_points</p></td>
<td class="parameter_description"><p>new surface height, in points (1 point == 1/72.0 inch)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-surface-add-outline"></a><h3>cairo_pdf_surface_add_outline ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span>
cairo_pdf_surface_add_outline (<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>,
                               <em class="parameter"><code><span class="type">int</span> parent_id</code></em>,
                               <em class="parameter"><code>const <span class="type">char</span> *utf8</code></em>,
                               <em class="parameter"><code>const <span class="type">char</span> *link_attribs</code></em>,
                               <em class="parameter"><code><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-outline-flags-t" title="enum cairo_pdf_outline_flags_t"><span class="type">cairo_pdf_outline_flags_t</span></a> flags</code></em>);</pre>
<p>Add an item to the document outline hierarchy with the name <em class="parameter"><code>utf8</code></em>

that links to the location specified by <em class="parameter"><code>link_attribs</code></em>
. Link
attributes have the same keys and values as the <a class="link" href="cairo-Tags-and-Links.html#link" title="Link Tags">Link Tag</a>,
excluding the "rect" attribute. The item will be a child of the
item with id <em class="parameter"><code>parent_id</code></em>
. Use <a class="link" href="cairo-PDF-Surfaces.html#CAIRO-PDF-OUTLINE-ROOT:CAPS" title="CAIRO_PDF_OUTLINE_ROOT"><code class="literal">CAIRO_PDF_OUTLINE_ROOT</code></a> as the parent
id of top level items.</p>
<div class="refsect3">
<a name="cairo-pdf-surface-add-outline.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>a PDF <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></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parent_id</p></td>
<td class="parameter_description"><p>the id of the parent item or <a class="link" href="cairo-PDF-Surfaces.html#CAIRO-PDF-OUTLINE-ROOT:CAPS" title="CAIRO_PDF_OUTLINE_ROOT"><code class="literal">CAIRO_PDF_OUTLINE_ROOT</code></a> if this is a top level item.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>utf8</p></td>
<td class="parameter_description"><p>the name of the outline</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>link_attribs</p></td>
<td class="parameter_description"><p>the link attributes specifying where this outline links to</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>outline item flags</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="cairo-pdf-surface-add-outline.returns"></a><h4>Returns</h4>
<p> the id for the added item.</p>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-surface-set-metadata"></a><h3>cairo_pdf_surface_set_metadata ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cairo_pdf_surface_set_metadata (<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>,
                                <em class="parameter"><code><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-metadata-t" title="enum cairo_pdf_metadata_t"><span class="type">cairo_pdf_metadata_t</span></a> metadata</code></em>,
                                <em class="parameter"><code>const <span class="type">char</span> *utf8</code></em>);</pre>
<p>Set document metadata. The <a class="link" href="cairo-PDF-Surfaces.html#CAIRO-PDF-METADATA-CREATE-DATE:CAPS"><code class="literal">CAIRO_PDF_METADATA_CREATE_DATE</code></a> and
<a class="link" href="cairo-PDF-Surfaces.html#CAIRO-PDF-METADATA-MOD-DATE:CAPS"><code class="literal">CAIRO_PDF_METADATA_MOD_DATE</code></a> values must be in ISO-8601 format:
YYYY-MM-DDThh:mm:ss. An optional timezone of the form "[+/-]hh:mm"
or "Z" for UTC time can be appended. All other metadata values can be any UTF-8
string.</p>
<p>For example:</p>
<div class="informalexample"><pre class="programlisting">
cairo_pdf_surface_set_metadata (surface, CAIRO_PDF_METADATA_TITLE, "My Document");
cairo_pdf_surface_set_metadata (surface, CAIRO_PDF_METADATA_CREATE_DATE, "2015-12-31T23:59+02:00");
</pre></div>
<div class="refsect3">
<a name="cairo-pdf-surface-set-metadata.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>a PDF <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></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>metadata</p></td>
<td class="parameter_description"><p>The metadata item to set.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>utf8</p></td>
<td class="parameter_description"><p>metadata value</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-surface-set-page-label"></a><h3>cairo_pdf_surface_set_page_label ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cairo_pdf_surface_set_page_label (<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>,
                                  <em class="parameter"><code>const <span class="type">char</span> *utf8</code></em>);</pre>
<p>Set page label for the current page.</p>
<div class="refsect3">
<a name="cairo-pdf-surface-set-page-label.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>a PDF <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></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>utf8</p></td>
<td class="parameter_description"><p>The page label.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-surface-set-thumbnail-size"></a><h3>cairo_pdf_surface_set_thumbnail_size ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
cairo_pdf_surface_set_thumbnail_size (<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>,
                                      <em class="parameter"><code><span class="type">int</span> width</code></em>,
                                      <em class="parameter"><code><span class="type">int</span> height</code></em>);</pre>
<p>Set the thumbnail image size for the current and all subsequent
pages. Setting a width or height of 0 disables thumbnails for the
current and subsequent pages.</p>
<div class="refsect3">
<a name="cairo-pdf-surface-set-thumbnail-size.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>a PDF <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></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>Thumbnail width.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>Thumbnail height</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.16</p>
</div>
</div>
<div class="refsect1">
<a name="cairo-PDF-Surfaces.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="CAIRO-HAS-PDF-SURFACE:CAPS"></a><h3>CAIRO_HAS_PDF_SURFACE</h3>
<pre class="programlisting">#define CAIRO_HAS_PDF_SURFACE 1
</pre>
<p>Defined if the PDF surface backend is available.
This macro can be used to conditionally compile backend-specific code.</p>
<p class="since">Since: 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="CAIRO-PDF-OUTLINE-ROOT:CAPS"></a><h3>CAIRO_PDF_OUTLINE_ROOT</h3>
<pre class="programlisting">#define CAIRO_PDF_OUTLINE_ROOT 0
</pre>
<p>The root outline item in <a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-add-outline" title="cairo_pdf_surface_add_outline ()"><code class="function">cairo_pdf_surface_add_outline()</code></a>.</p>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-outline-flags-t"></a><h3>enum cairo_pdf_outline_flags_t</h3>
<p><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-outline-flags-t" title="enum cairo_pdf_outline_flags_t"><span class="type">cairo_pdf_outline_flags_t</span></a> is used by the
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-add-outline" title="cairo_pdf_surface_add_outline ()"><code class="function">cairo_pdf_surface_add_outline()</code></a> function specify the attributes of
an outline item. These flags may be bitwise-or'd to produce any
combination of flags.</p>
<div class="refsect3">
<a name="cairo-pdf-outline-flags-t.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-OUTLINE-FLAG-OPEN:CAPS"></a>CAIRO_PDF_OUTLINE_FLAG_OPEN</p></td>
<td class="enum_member_description">
<p>The outline item defaults to open in the PDF viewer (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-OUTLINE-FLAG-BOLD:CAPS"></a>CAIRO_PDF_OUTLINE_FLAG_BOLD</p></td>
<td class="enum_member_description">
<p>The outline item is displayed by the viewer in bold text (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-OUTLINE-FLAG-ITALIC:CAPS"></a>CAIRO_PDF_OUTLINE_FLAG_ITALIC</p></td>
<td class="enum_member_description">
<p>The outline item is displayed by the viewer in italic text (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-metadata-t"></a><h3>enum cairo_pdf_metadata_t</h3>
<p><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-metadata-t" title="enum cairo_pdf_metadata_t"><span class="type">cairo_pdf_metadata_t</span></a> is used by the
<a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-surface-set-metadata" title="cairo_pdf_surface_set_metadata ()"><code class="function">cairo_pdf_surface_set_metadata()</code></a> function specify the metadata to set.</p>
<div class="refsect3">
<a name="cairo-pdf-metadata-t.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-METADATA-TITLE:CAPS"></a>CAIRO_PDF_METADATA_TITLE</p></td>
<td class="enum_member_description">
<p>The document title (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-METADATA-AUTHOR:CAPS"></a>CAIRO_PDF_METADATA_AUTHOR</p></td>
<td class="enum_member_description">
<p>The document author (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-METADATA-SUBJECT:CAPS"></a>CAIRO_PDF_METADATA_SUBJECT</p></td>
<td class="enum_member_description">
<p>The document subject (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-METADATA-KEYWORDS:CAPS"></a>CAIRO_PDF_METADATA_KEYWORDS</p></td>
<td class="enum_member_description">
<p>The document keywords (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-METADATA-CREATOR:CAPS"></a>CAIRO_PDF_METADATA_CREATOR</p></td>
<td class="enum_member_description">
<p>The document creator (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-METADATA-CREATE-DATE:CAPS"></a>CAIRO_PDF_METADATA_CREATE_DATE</p></td>
<td class="enum_member_description">
<p>The document creation date (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-METADATA-MOD-DATE:CAPS"></a>CAIRO_PDF_METADATA_MOD_DATE</p></td>
<td class="enum_member_description">
<p>The document modification date (Since 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="cairo-pdf-version-t"></a><h3>enum cairo_pdf_version_t</h3>
<p><a class="link" href="cairo-PDF-Surfaces.html#cairo-pdf-version-t" title="enum cairo_pdf_version_t"><span class="type">cairo_pdf_version_t</span></a> is used to describe the version number of the PDF
specification that a generated PDF file will conform to.</p>
<div class="refsect3">
<a name="cairo-pdf-version-t.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-VERSION-1-4:CAPS"></a>CAIRO_PDF_VERSION_1_4</p></td>
<td class="enum_member_description">
<p>The version 1.4 of the PDF specification. (Since 1.10)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CAIRO-PDF-VERSION-1-5:CAPS"></a>CAIRO_PDF_VERSION_1_5</p></td>
<td class="enum_member_description">
<p>The version 1.5 of the PDF specification. (Since 1.10)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.10</p>
</div>
</div>
<div class="refsect1">
<a name="cairo-PDF-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>
</div>
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