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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Cairo Rendering: Pango Reference Manual</title>
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<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="#pango-Cairo-Rendering.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#pango-Cairo-Rendering.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_prerequisites">  <span class="dim">|</span> 
                  <a href="#pango-Cairo-Rendering.prerequisites" class="shortcut">Prerequisites</a></span>
</td>
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</tr></table>
<div class="refentry">
<a name="pango-Cairo-Rendering"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="pango-Cairo-Rendering.top_of_page"></a>Cairo Rendering</span></h2>
<p>Cairo Rendering — Rendering with the Cairo backend</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="pango-Cairo-Rendering.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="pango-Fonts.html#PangoFontMap"><span class="returnvalue">PangoFontMap</span></a> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-get-default" title="pango_cairo_font_map_get_default ()">pango_cairo_font_map_get_default</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="pango-Cairo-Rendering.html#pango-cairo-font-map-set-default" title="pango_cairo_font_map_set_default ()">pango_cairo_font_map_set_default</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="pango-Fonts.html#PangoFontMap"><span class="returnvalue">PangoFontMap</span></a> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-new" title="pango_cairo_font_map_new ()">pango_cairo_font_map_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="pango-Fonts.html#PangoFontMap"><span class="returnvalue">PangoFontMap</span></a> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-new-for-font-type" title="pango_cairo_font_map_new_for_font_type ()">pango_cairo_font_map_new_for_font_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">cairo_font_type_t</span>
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-get-font-type" title="pango_cairo_font_map_get_font_type ()">pango_cairo_font_map_get_font_type</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="pango-Cairo-Rendering.html#pango-cairo-font-map-set-resolution" title="pango_cairo_font_map_set_resolution ()">pango_cairo_font_map_set_resolution</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">double</span>
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-get-resolution" title="pango_cairo_font_map_get_resolution ()">pango_cairo_font_map_get_resolution</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="pango-Text-Processing.html#PangoContext"><span class="returnvalue">PangoContext</span></a> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-create-context" title="pango_cairo_font_map_create_context ()">pango_cairo_font_map_create_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">cairo_scaled_font_t</span> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-get-scaled-font" title="pango_cairo_font_get_scaled_font ()">pango_cairo_font_get_scaled_font</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="pango-Cairo-Rendering.html#pango-cairo-context-set-resolution" title="pango_cairo_context_set_resolution ()">pango_cairo_context_set_resolution</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">double</span>
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-context-get-resolution" title="pango_cairo_context_get_resolution ()">pango_cairo_context_get_resolution</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="pango-Cairo-Rendering.html#pango-cairo-context-set-font-options" title="pango_cairo_context_set_font_options ()">pango_cairo_context_set_font_options</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">cairo_font_options_t</span> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-context-get-font-options" title="pango_cairo_context_get_font_options ()">pango_cairo_context_get_font_options</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="pango-Cairo-Rendering.html#PangoCairoShapeRendererFunc" title="PangoCairoShapeRendererFunc ()">*PangoCairoShapeRendererFunc</a><span class="c_punctuation">)</span> <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="pango-Cairo-Rendering.html#pango-cairo-context-set-shape-renderer" title="pango_cairo_context_set_shape_renderer ()">pango_cairo_context_set_shape_renderer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="pango-Cairo-Rendering.html#PangoCairoShapeRendererFunc" title="PangoCairoShapeRendererFunc ()"><span class="returnvalue">PangoCairoShapeRendererFunc</span></a>
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-context-get-shape-renderer" title="pango_cairo_context_get_shape_renderer ()">pango_cairo_context_get_shape_renderer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="pango-Text-Processing.html#PangoContext"><span class="returnvalue">PangoContext</span></a> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-create-context" title="pango_cairo_create_context ()">pango_cairo_create_context</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="pango-Cairo-Rendering.html#pango-cairo-update-context" title="pango_cairo_update_context ()">pango_cairo_update_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="returnvalue">PangoLayout</span></a> *
</td>
<td class="function_name">
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-create-layout" title="pango_cairo_create_layout ()">pango_cairo_create_layout</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="pango-Cairo-Rendering.html#pango-cairo-update-layout" title="pango_cairo_update_layout ()">pango_cairo_update_layout</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="pango-Cairo-Rendering.html#pango-cairo-show-glyph-string" title="pango_cairo_show_glyph_string ()">pango_cairo_show_glyph_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="pango-Cairo-Rendering.html#pango-cairo-show-glyph-item" title="pango_cairo_show_glyph_item ()">pango_cairo_show_glyph_item</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="pango-Cairo-Rendering.html#pango-cairo-show-layout-line" title="pango_cairo_show_layout_line ()">pango_cairo_show_layout_line</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="pango-Cairo-Rendering.html#pango-cairo-show-layout" title="pango_cairo_show_layout ()">pango_cairo_show_layout</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="pango-Cairo-Rendering.html#pango-cairo-show-error-underline" title="pango_cairo_show_error_underline ()">pango_cairo_show_error_underline</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="pango-Cairo-Rendering.html#pango-cairo-glyph-string-path" title="pango_cairo_glyph_string_path ()">pango_cairo_glyph_string_path</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="pango-Cairo-Rendering.html#pango-cairo-layout-line-path" title="pango_cairo_layout_line_path ()">pango_cairo_layout_line_path</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="pango-Cairo-Rendering.html#pango-cairo-layout-path" title="pango_cairo_layout_path ()">pango_cairo_layout_path</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="pango-Cairo-Rendering.html#pango-cairo-error-underline-path" title="pango_cairo_error_underline_path ()">pango_cairo_error_underline_path</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<a name="PangoCairoFont"></a><a name="PangoCairoFontMap"></a><div class="refsect1">
<a name="pango-Cairo-Rendering.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="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFont-struct" title="PangoCairoFont">PangoCairoFont</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap-struct" title="PangoCairoFontMap">PangoCairoFontMap</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="pango-Cairo-Rendering.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/GTypeModule.html">GInterface</a>
    <span class="lineart">├──</span> PangoCairoFont
    <span class="lineart">╰──</span> PangoCairoFontMap
</pre>
</div>
<div class="refsect1">
<a name="pango-Cairo-Rendering.prerequisites"></a><h2>Prerequisites</h2>
<p>
PangoCairoFont requires
 <a class="link" href="pango-Fonts.html#PangoFont">PangoFont</a>.</p>
<p>
PangoCairoFontMap requires
 <a class="link" href="pango-Fonts.html#PangoFontMap">PangoFontMap</a>.</p>
</div>
<div class="refsect1">
<a name="pango-Cairo-Rendering.description"></a><h2>Description</h2>
<p>The <a class="ulink" href="http://cairographics.org" target="_top">Cairo library</a> is a
vector graphics library with a powerful rendering model. It has such
features as anti-aliased primitives, alpha-compositing, and
gradients. Multiple backends for Cairo are available, to allow
rendering to images, to PDF files, and to the screen on X and on other
windowing systems. The functions in this section allow using Pango
to render to Cairo surfaces.</p>
<p>Using Pango with Cairo is straightforward. A <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> created
with <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-create-context" title="pango_cairo_font_map_create_context ()"><code class="function">pango_cairo_font_map_create_context()</code></a> can be used on any
Cairo context (cairo_t), but needs to be updated to match the
current transformation matrix and target surface of the Cairo context
using <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-update-context" title="pango_cairo_update_context ()"><code class="function">pango_cairo_update_context()</code></a>. The convenience functions
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-create-layout" title="pango_cairo_create_layout ()"><code class="function">pango_cairo_create_layout()</code></a> and <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-update-layout" title="pango_cairo_update_layout ()"><code class="function">pango_cairo_update_layout()</code></a> handle
the common case where the program doesn't need to manipulate the
properties of the <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>.</p>
<p>When you get the metrics of a layout or of a piece of a layout using
functions such as <a class="link" href="pango-Layout-Objects.html#pango-layout-get-extents" title="pango_layout_get_extents ()"><code class="function">pango_layout_get_extents()</code></a>, the reported metrics
are in user-space coordinates. If a piece of text is 10 units long,
and you call cairo_scale (cr, 2.0), it still is more-or-less 10
units long. However, the results will be affected by hinting
(that is, the process of adjusting the text to look good on the
pixel grid), so you shouldn't assume they are completely independent
of the current transformation matrix. Note that the basic metrics
functions in Pango report results in integer Pango units. To get
to the floating point units used in Cairo divide by <a class="link" href="pango-Glyph-Storage.html#PANGO-SCALE:CAPS" title="PANGO_SCALE"><code class="literal">PANGO_SCALE</code></a>.</p>
<div class="example">
<a name="rotated-example"></a><p class="title"><b>Example 1. Using Pango with Cairo</b></p>
<div class="example-contents">
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        <td class="listing_code"><pre class="programlisting"><span class="gtkdoc ppc">#include &lt;math.h&gt;</span>
<span class="gtkdoc ppc">#include &lt;pango/pangocairo.h&gt;</span>

<span class="gtkdoc kwb">static void</span>
<span class="function">draw_text</span> <span class="gtkdoc opt">(</span>cairo_t <span class="gtkdoc opt">*</span>cr<span class="gtkdoc opt">)</span>
<span class="gtkdoc opt">{</span>
<span class="gtkdoc ppc">#define RADIUS 150</span>
<span class="gtkdoc ppc">#define N_WORDS 10</span>
<span class="gtkdoc ppc">#define FONT</span> <span class="gtkdoc pps">&quot;Sans Bold 27&quot;</span><span class="gtkdoc ppc"></span>

  PangoLayout <span class="gtkdoc opt">*</span>layout<span class="gtkdoc opt">;</span>
  PangoFontDescription <span class="gtkdoc opt">*</span>desc<span class="gtkdoc opt">;</span>
  <span class="gtkdoc kwb">int</span> i<span class="gtkdoc opt">;</span>

  <span class="comment">/* Center coordinates on the middle of the region we are drawing</span>
<span class="comment">   */</span>
  <span class="function">cairo_translate</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">,</span> RADIUS<span class="gtkdoc opt">,</span> RADIUS<span class="gtkdoc opt">);</span>

  <span class="comment">/* Create a PangoLayout, set the font and text */</span>
  layout <span class="gtkdoc opt">=</span> <span class="function"><a href="pango-Cairo-Rendering.html#pango-cairo-create-layout">pango_cairo_create_layout</a></span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">);</span>

  <span class="function"><a href="pango-Layout-Objects.html#pango-layout-set-text">pango_layout_set_text</a></span> <span class="gtkdoc opt">(</span>layout<span class="gtkdoc opt">,</span> <span class="string">&quot;Text&quot;</span><span class="gtkdoc opt">, -</span><span class="number">1</span><span class="gtkdoc opt">);</span>
  desc <span class="gtkdoc opt">=</span> <span class="function"><a href="pango-Fonts.html#pango-font-description-from-string">pango_font_description_from_string</a></span> <span class="gtkdoc opt">(</span>FONT<span class="gtkdoc opt">);</span>
  <span class="function"><a href="pango-Layout-Objects.html#pango-layout-set-font-description">pango_layout_set_font_description</a></span> <span class="gtkdoc opt">(</span>layout<span class="gtkdoc opt">,</span> desc<span class="gtkdoc opt">);</span>
  <span class="function"><a href="pango-Fonts.html#pango-font-description-free">pango_font_description_free</a></span> <span class="gtkdoc opt">(</span>desc<span class="gtkdoc opt">);</span>

  <span class="comment">/* Draw the layout N_WORDS times in a circle */</span>
  <span class="keyword">for</span> <span class="gtkdoc opt">(</span>i <span class="gtkdoc opt">=</span> <span class="number">0</span><span class="gtkdoc opt">;</span> i <span class="gtkdoc opt">&lt;</span> N_WORDS<span class="gtkdoc opt">;</span> i<span class="gtkdoc opt">++)</span>
    <span class="gtkdoc opt">{</span>
      <span class="gtkdoc kwb">int</span> width<span class="gtkdoc opt">,</span> height<span class="gtkdoc opt">;</span>
      <span class="gtkdoc kwb">double</span> angle <span class="gtkdoc opt">= (</span><span class="number">360</span><span class="gtkdoc opt">. *</span> i<span class="gtkdoc opt">) /</span> N_WORDS<span class="gtkdoc opt">;</span>
      <span class="gtkdoc kwb">double</span> red<span class="gtkdoc opt">;</span>

      <span class="function">cairo_save</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">);</span>

      <span class="comment">/* Gradient from red at angle == 60 to blue at angle == 240 */</span>
      red   <span class="gtkdoc opt">= (</span><span class="number">1</span> <span class="gtkdoc opt">+</span> <span class="function">cos</span> <span class="gtkdoc opt">((</span>angle <span class="gtkdoc opt">-</span> <span class="number">60</span><span class="gtkdoc opt">) *</span> G_PI <span class="gtkdoc opt">/</span> <span class="number">180</span><span class="gtkdoc opt">.)) /</span> <span class="number">2</span><span class="gtkdoc opt">;</span>
      <span class="function">cairo_set_source_rgb</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">,</span> red<span class="gtkdoc opt">,</span> <span class="number">0</span><span class="gtkdoc opt">,</span> <span class="number">1.0</span> <span class="gtkdoc opt">-</span> red<span class="gtkdoc opt">);</span>

      <span class="function">cairo_rotate</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">,</span> angle <span class="gtkdoc opt">*</span> G_PI <span class="gtkdoc opt">/</span> <span class="number">180</span><span class="gtkdoc opt">.);</span>

      <span class="comment">/* Inform Pango to re-layout the text with the new transformation */</span>
      <span class="function"><a href="pango-Cairo-Rendering.html#pango-cairo-update-layout">pango_cairo_update_layout</a></span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">,</span> layout<span class="gtkdoc opt">);</span>

      <span class="function"><a href="pango-Layout-Objects.html#pango-layout-get-size">pango_layout_get_size</a></span> <span class="gtkdoc opt">(</span>layout<span class="gtkdoc opt">, &amp;</span>width<span class="gtkdoc opt">, &amp;</span>height<span class="gtkdoc opt">);</span>
      <span class="function">cairo_move_to</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">, - ((</span><span class="gtkdoc kwb">double</span><span class="gtkdoc opt">)</span>width <span class="gtkdoc opt">/</span> PANGO_SCALE<span class="gtkdoc opt">) /</span> <span class="number">2</span><span class="gtkdoc opt">, -</span> RADIUS<span class="gtkdoc opt">);</span>
      <span class="function"><a href="pango-Cairo-Rendering.html#pango-cairo-show-layout">pango_cairo_show_layout</a></span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">,</span> layout<span class="gtkdoc opt">);</span>

      <span class="function">cairo_restore</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">);</span>
    <span class="gtkdoc opt">}</span>

  <span class="comment">/* free the layout object */</span>
  <span class="function"><a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span> <span class="gtkdoc opt">(</span>layout<span class="gtkdoc opt">);</span>
<span class="gtkdoc opt">}</span>

<span class="gtkdoc kwb">int</span> <span class="function">main</span> <span class="gtkdoc opt">(</span><span class="gtkdoc kwb">int</span> argc<span class="gtkdoc opt">,</span> <span class="gtkdoc kwb">char</span> <span class="gtkdoc opt">**</span>argv<span class="gtkdoc opt">)</span>
<span class="gtkdoc opt">{</span>
  cairo_t <span class="gtkdoc opt">*</span>cr<span class="gtkdoc opt">;</span>
  <span class="gtkdoc kwb">char</span> <span class="gtkdoc opt">*</span>filename<span class="gtkdoc opt">;</span>
  cairo_status_t status<span class="gtkdoc opt">;</span>
  cairo_surface_t <span class="gtkdoc opt">*</span>surface<span class="gtkdoc opt">;</span>

  <span class="keyword">if</span> <span class="gtkdoc opt">(</span>argc <span class="gtkdoc opt">!=</span> <span class="number">2</span><span class="gtkdoc opt">)</span>
    <span class="gtkdoc opt">{</span>
      <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Warnings-and-Assertions.html#g-printerr">g_printerr</a></span> <span class="gtkdoc opt">(</span><span class="string">&quot;Usage: cairosimple OUTPUT_FILENAME</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="gtkdoc opt">);</span>
      <span class="keyword">return</span> <span class="number">1</span><span class="gtkdoc opt">;</span>
    <span class="gtkdoc opt">}</span>

     filename <span class="gtkdoc opt">=</span> argv<span class="gtkdoc opt">[</span><span class="number">1</span><span class="gtkdoc opt">];</span>

  surface <span class="gtkdoc opt">=</span> <span class="function">cairo_image_surface_create</span> <span class="gtkdoc opt">(</span>CAIRO_FORMAT_ARGB32<span class="gtkdoc opt">,</span>
                                        <span class="number">2</span> <span class="gtkdoc opt">*</span> RADIUS<span class="gtkdoc opt">,</span> <span class="number">2</span> <span class="gtkdoc opt">*</span> RADIUS<span class="gtkdoc opt">);</span>
  cr <span class="gtkdoc opt">=</span> <span class="function">cairo_create</span> <span class="gtkdoc opt">(</span>surface<span class="gtkdoc opt">);</span>

  <span class="function">cairo_set_source_rgb</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">,</span> <span class="number">1.0</span><span class="gtkdoc opt">,</span> <span class="number">1.0</span><span class="gtkdoc opt">,</span> <span class="number">1.0</span><span class="gtkdoc opt">);</span>
  <span class="function">cairo_paint</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">);</span>
  <span class="function">draw_text</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">);</span>
  <span class="function">cairo_destroy</span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">);</span>

  status <span class="gtkdoc opt">=</span> <span class="function">cairo_surface_write_to_png</span> <span class="gtkdoc opt">(</span>surface<span class="gtkdoc opt">,</span> filename<span class="gtkdoc opt">);</span>
  <span class="function">cairo_surface_destroy</span> <span class="gtkdoc opt">(</span>surface<span class="gtkdoc opt">);</span>

  <span class="keyword">if</span> <span class="gtkdoc opt">(</span>status <span class="gtkdoc opt">!=</span> CAIRO_STATUS_SUCCESS<span class="gtkdoc opt">)</span>
    <span class="gtkdoc opt">{</span>
      <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Warnings-and-Assertions.html#g-printerr">g_printerr</a></span> <span class="gtkdoc opt">(</span><span class="string">&quot;Could not save png to &apos;%s&apos;</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="gtkdoc opt">,</span> filename<span class="gtkdoc opt">);</span>
      <span class="keyword">return</span> <span class="number">1</span><span class="gtkdoc opt">;</span>
    <span class="gtkdoc opt">}</span>

  <span class="keyword">return</span> <span class="number">0</span><span class="gtkdoc opt">;</span>
<span class="gtkdoc opt">}</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

</div>
<br class="example-break"><div class="figure">
<a name="rotated-example-output"></a><p class="title"><b>Figure 2. Output of <a class="xref" href="pango-Cairo-Rendering.html#rotated-example" title="Example 1. Using Pango with Cairo">Example 1, “Using Pango with Cairo”</a></b></p>
<div class="figure-contents"><div><img src="rotated-text.png" alt="Output of Example 1, “Using Pango with Cairo”"></div></div>
</div>
<br class="figure-break">
</div>
<div class="refsect1">
<a name="pango-Cairo-Rendering.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="pango-cairo-font-map-get-default"></a><h3>pango_cairo_font_map_get_default ()</h3>
<pre class="programlisting"><a class="link" href="pango-Fonts.html#PangoFontMap"><span class="returnvalue">PangoFontMap</span></a> *
pango_cairo_font_map_get_default (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Gets a default <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> to use with Cairo.</p>
<p>Note that the type of the returned object will depend
on the particular font backend Cairo was compiled to use;
You generally should only use the <a class="link" href="pango-Fonts.html#PangoFontMap"><span class="type">PangoFontMap</span></a> and
<a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> interfaces on the returned object.</p>
<p>The default Cairo fontmap can be changed by using
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-set-default" title="pango_cairo_font_map_set_default ()"><code class="function">pango_cairo_font_map_set_default()</code></a>.  This can be used to
change the Cairo font backend that the default fontmap
uses for example.</p>
<p>Note that since Pango 1.32.6, the default fontmap is per-thread.
Each thread gets its own default fontmap.  In this way,
PangoCairo can be used safely from multiple threads.</p>
<div class="refsect3">
<a name="pango-cairo-font-map-get-default.returns"></a><h4>Returns</h4>
<p> the default PangoCairo fontmap
for the current thread. This object is owned by Pango and must not be freed. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-map-set-default"></a><h3>pango_cairo_font_map_set_default ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_font_map_set_default (<em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> *fontmap</code></em>);</pre>
<p>Sets a default <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> to use with Cairo.</p>
<p>This can be used to change the Cairo font backend that the
default fontmap uses for example.  The old default font map
is unreffed and the new font map referenced.</p>
<p>Note that since Pango 1.32.6, the default fontmap is per-thread.
This function only changes the default fontmap for
the current thread.   Default fontmaps of exisiting threads
are not changed.  Default fontmaps of any new threads will
still be created using <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-new" title="pango_cairo_font_map_new ()"><code class="function">pango_cairo_font_map_new()</code></a>.</p>
<p>A value of <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for <em class="parameter"><code>fontmap</code></em>
 will cause the current default
font map to be released and a new default font
map to be created on demand, using <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-new" title="pango_cairo_font_map_new ()"><code class="function">pango_cairo_font_map_new()</code></a>.</p>
<div class="refsect3">
<a name="pango-cairo-font-map-set-default.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>fontmap</p></td>
<td class="parameter_description"><p> The new default font map, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-22.html#api-index-1.22">1.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-map-new"></a><h3>pango_cairo_font_map_new ()</h3>
<pre class="programlisting"><a class="link" href="pango-Fonts.html#PangoFontMap"><span class="returnvalue">PangoFontMap</span></a> *
pango_cairo_font_map_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Creates a new <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> object; a fontmap is used
to cache information about available fonts, and holds
certain global parameters such as the resolution.
In most cases, you can use <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-get-default" title="pango_cairo_font_map_get_default ()"><code class="function">pango_cairo_font_map_get_default()</code></a>
instead.</p>
<p>Note that the type of the returned object will depend
on the particular font backend Cairo was compiled to use;
You generally should only use the <a class="link" href="pango-Fonts.html#PangoFontMap"><span class="type">PangoFontMap</span></a> and
<a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> interfaces on the returned object.</p>
<p>You can override the type of backend returned by using an
environment variable <code class="literal">PANGOCAIRO_BACKEND</code>.  Supported types,
based on your build, are fc (fontconfig), win32, and coretext.
If requested type is not available, NULL is returned. Ie.
this is only useful for testing, when at least two backends
are compiled in.</p>
<div class="refsect3">
<a name="pango-cairo-font-map-new.returns"></a><h4>Returns</h4>
<p> the newly allocated <a class="link" href="pango-Fonts.html#PangoFontMap"><span class="type">PangoFontMap</span></a>,
which should be freed with <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-map-new-for-font-type"></a><h3>pango_cairo_font_map_new_for_font_type ()</h3>
<pre class="programlisting"><a class="link" href="pango-Fonts.html#PangoFontMap"><span class="returnvalue">PangoFontMap</span></a> *
pango_cairo_font_map_new_for_font_type
                               (<em class="parameter"><code><span class="type">cairo_font_type_t</span> fonttype</code></em>);</pre>
<p>Creates a new <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> object of the type suitable
to be used with cairo font backend of type <em class="parameter"><code>fonttype</code></em>
.</p>
<p>In most cases one should simply use <em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-new" title="pango_cairo_font_map_new ()"><code class="function">pango_cairo_font_map_new()</code></a></code></em>
,
or in fact in most of those cases, just use
<em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-get-default" title="pango_cairo_font_map_get_default ()"><code class="function">pango_cairo_font_map_get_default()</code></a></code></em>
.</p>
<div class="refsect3">
<a name="pango-cairo-font-map-new-for-font-type.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>fonttype</p></td>
<td class="parameter_description"><p>desired <span class="type">cairo_font_type_t</span></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-font-map-new-for-font-type.returns"></a><h4>Returns</h4>
<p> the newly allocated
<a class="link" href="pango-Fonts.html#PangoFontMap"><span class="type">PangoFontMap</span></a> of suitable type which should be freed
with <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the requested
cairo font backend is not supported / compiled in. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-18.html#api-index-1.18">1.18</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-map-get-font-type"></a><h3>pango_cairo_font_map_get_font_type ()</h3>
<pre class="programlisting"><span class="returnvalue">cairo_font_type_t</span>
pango_cairo_font_map_get_font_type (<em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> *fontmap</code></em>);</pre>
<p>Gets the type of Cairo font backend that <em class="parameter"><code>fontmap</code></em>
 uses.</p>
<div class="refsect3">
<a name="pango-cairo-font-map-get-font-type.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>fontmap</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-font-map-get-font-type.returns"></a><h4>Returns</h4>
<p> the <span class="type">cairo_font_type_t</span> cairo font backend type</p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-18.html#api-index-1.18">1.18</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-map-set-resolution"></a><h3>pango_cairo_font_map_set_resolution ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_font_map_set_resolution (<em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> *fontmap</code></em>,
                                     <em class="parameter"><code><span class="type">double</span> dpi</code></em>);</pre>
<p>Sets the resolution for the fontmap. This is a scale factor between
points specified in a <a class="link" href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a> and Cairo units. The
default value is 96, meaning that a 10 point font will be 13
units high. (10 * 96. / 72. = 13.3).</p>
<div class="refsect3">
<a name="pango-cairo-font-map-set-resolution.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>fontmap</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dpi</p></td>
<td class="parameter_description"><p>the resolution in "dots per inch". (Physical inches aren't actually
involved; the terminology is conventional.)</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-map-get-resolution"></a><h3>pango_cairo_font_map_get_resolution ()</h3>
<pre class="programlisting"><span class="returnvalue">double</span>
pango_cairo_font_map_get_resolution (<em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> *fontmap</code></em>);</pre>
<p>Gets the resolution for the fontmap. See <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-font-map-set-resolution" title="pango_cairo_font_map_set_resolution ()"><code class="function">pango_cairo_font_map_set_resolution()</code></a></p>
<div class="refsect3">
<a name="pango-cairo-font-map-get-resolution.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>fontmap</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-font-map-get-resolution.returns"></a><h4>Returns</h4>
<p> the resolution in "dots per inch"</p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-map-create-context"></a><h3>pango_cairo_font_map_create_context ()</h3>
<pre class="programlisting"><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="returnvalue">PangoContext</span></a> *
pango_cairo_font_map_create_context (<em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> *fontmap</code></em>);</pre>
<div class="warning">
<p><code class="literal">pango_cairo_font_map_create_context</code> has been deprecated since version 1.22 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="pango-Fonts.html#pango-font-map-create-context" title="pango_font_map_create_context ()"><code class="function">pango_font_map_create_context()</code></a> instead.</p>
</div>
<p>Create a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> for the given fontmap.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="pango-cairo-font-map-create-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>fontmap</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-font-map-create-context.returns"></a><h4>Returns</h4>
<p> the newly created context; free with <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a>.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-font-get-scaled-font"></a><h3>pango_cairo_font_get_scaled_font ()</h3>
<pre class="programlisting"><span class="returnvalue">cairo_scaled_font_t</span> *
pango_cairo_font_get_scaled_font (<em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFont"><span class="type">PangoCairoFont</span></a> *font</code></em>);</pre>
<p>Gets the <span class="type">cairo_scaled_font_t</span> used by <em class="parameter"><code>font</code></em>
.
The scaled font can be referenced and kept using
<code class="function">cairo_scaled_font_reference()</code>.</p>
<div class="refsect3">
<a name="pango-cairo-font-get-scaled-font.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>font</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Fonts.html#PangoFont"><span class="type">PangoFont</span></a> from a <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-font-get-scaled-font.returns"></a><h4>Returns</h4>
<p> the <span class="type">cairo_scaled_font_t</span> used by <em class="parameter"><code>font</code></em>
,
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if <em class="parameter"><code>font</code></em>
is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-18.html#api-index-1.18">1.18</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-context-set-resolution"></a><h3>pango_cairo_context_set_resolution ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_context_set_resolution (<em class="parameter"><code><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> *context</code></em>,
                                    <em class="parameter"><code><span class="type">double</span> dpi</code></em>);</pre>
<p>Sets the resolution for the context. This is a scale factor between
points specified in a <a class="link" href="pango-Fonts.html#PangoFontDescription"><span class="type">PangoFontDescription</span></a> and Cairo units. The
default value is 96, meaning that a 10 point font will be 13
units high. (10 * 96. / 72. = 13.3).</p>
<div class="refsect3">
<a name="pango-cairo-context-set-resolution.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>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>, from a pangocairo font map</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dpi</p></td>
<td class="parameter_description"><p>the resolution in "dots per inch". (Physical inches aren't actually
involved; the terminology is conventional.) A 0 or negative value
means to use the resolution from the font map.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-context-get-resolution"></a><h3>pango_cairo_context_get_resolution ()</h3>
<pre class="programlisting"><span class="returnvalue">double</span>
pango_cairo_context_get_resolution (<em class="parameter"><code><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> *context</code></em>);</pre>
<p>Gets the resolution for the context. See <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-context-set-resolution" title="pango_cairo_context_set_resolution ()"><code class="function">pango_cairo_context_set_resolution()</code></a></p>
<div class="refsect3">
<a name="pango-cairo-context-get-resolution.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>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>, from a pangocairo font map</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-context-get-resolution.returns"></a><h4>Returns</h4>
<p> the resolution in "dots per inch". A negative value will
be returned if no resolution has previously been set.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-context-set-font-options"></a><h3>pango_cairo_context_set_font_options ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_context_set_font_options (<em class="parameter"><code><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> *context</code></em>,
                                      <em class="parameter"><code>const <span class="type">cairo_font_options_t</span> *options</code></em>);</pre>
<p>Sets the font options used when rendering text with this context.
These options override any options that <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-update-context" title="pango_cairo_update_context ()"><code class="function">pango_cairo_update_context()</code></a>
derives from the target surface.</p>
<div class="refsect3">
<a name="pango-cairo-context-set-font-options.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>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>, from a pangocairo font map</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>options</p></td>
<td class="parameter_description"><p> a <span class="type">cairo_font_options_t</span>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to unset
any previously set options. A copy is made. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-context-get-font-options"></a><h3>pango_cairo_context_get_font_options ()</h3>
<pre class="programlisting">const <span class="returnvalue">cairo_font_options_t</span> *
pango_cairo_context_get_font_options (<em class="parameter"><code><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> *context</code></em>);</pre>
<p>Retrieves any font rendering options previously set with
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-context-set-font-options" title="pango_cairo_context_set_font_options ()"><code class="function">pango_cairo_context_set_font_options()</code></a>. This function does not report options
that are derived from the target surface by <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-update-context" title="pango_cairo_update_context ()"><code class="function">pango_cairo_update_context()</code></a></p>
<div class="refsect3">
<a name="pango-cairo-context-get-font-options.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>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>, from a pangocairo font map</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-context-get-font-options.returns"></a><h4>Returns</h4>
<p> the font options previously set on the
context, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if no options have been set. This value is
owned by the context and must not be modified or freed. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="PangoCairoShapeRendererFunc"></a><h3>PangoCairoShapeRendererFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*PangoCairoShapeRendererFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                                <em class="parameter"><code><a class="link" href="pango-Text-Attributes.html#PangoAttrShape" title="struct PangoAttrShape"><span class="type">PangoAttrShape</span></a> *attr</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> do_path</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre>
<p>Function type for rendering attributes of type <a class="link" href="pango-Text-Attributes.html#PANGO-ATTR-SHAPE:CAPS"><code class="literal">PANGO_ATTR_SHAPE</code></a>
with Pango's Cairo renderer.</p>
<div class="refsect3">
<a name="PangoCairoShapeRendererFunc.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context with current point set to where the shape should
be rendered</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>attr</p></td>
<td class="parameter_description"><p>the <a class="link" href="pango-Text-Attributes.html#PANGO-ATTR-SHAPE:CAPS"><code class="literal">PANGO_ATTR_SHAPE</code></a> to render</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>do_path</p></td>
<td class="parameter_description"><p>whether only the shape path should be appended to current
path of <em class="parameter"><code>cr</code></em>
and no filling/stroking done.  This will be set
to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> when called from <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-layout-path" title="pango_cairo_layout_path ()"><code class="function">pango_cairo_layout_path()</code></a> and
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-layout-line-path" title="pango_cairo_layout_line_path ()"><code class="function">pango_cairo_layout_line_path()</code></a> rendering functions.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>user data passed to <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-context-set-shape-renderer" title="pango_cairo_context_set_shape_renderer ()"><code class="function">pango_cairo_context_set_shape_renderer()</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-context-set-shape-renderer"></a><h3>pango_cairo_context_set_shape_renderer ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_context_set_shape_renderer
                               (<em class="parameter"><code><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> *context</code></em>,
                                <em class="parameter"><code><a class="link" href="pango-Cairo-Rendering.html#PangoCairoShapeRendererFunc" title="PangoCairoShapeRendererFunc ()"><span class="type">PangoCairoShapeRendererFunc</span></a> func</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> dnotify</code></em>);</pre>
<p>Sets callback function for context to use for rendering attributes
of type <a class="link" href="pango-Text-Attributes.html#PANGO-ATTR-SHAPE:CAPS"><code class="literal">PANGO_ATTR_SHAPE</code></a>.  See <a class="link" href="pango-Cairo-Rendering.html#PangoCairoShapeRendererFunc" title="PangoCairoShapeRendererFunc ()"><span class="type">PangoCairoShapeRendererFunc</span></a> for
details.</p>
<div class="refsect3">
<a name="pango-cairo-context-set-shape-renderer.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>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>, from a pangocairo font map</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p> Callback function for rendering attributes of
type <a class="link" href="pango-Text-Attributes.html#PANGO-ATTR-SHAPE:CAPS"><code class="literal">PANGO_ATTR_SHAPE</code></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to disable shape rendering. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>User data that will be passed to <em class="parameter"><code>func</code></em>
.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dnotify</p></td>
<td class="parameter_description"><p>Callback that will be called when the
context is freed to release <em class="parameter"><code>data</code></em>
, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-18.html#api-index-1.18">1.18</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-context-get-shape-renderer"></a><h3>pango_cairo_context_get_shape_renderer ()</h3>
<pre class="programlisting"><a class="link" href="pango-Cairo-Rendering.html#PangoCairoShapeRendererFunc" title="PangoCairoShapeRendererFunc ()"><span class="returnvalue">PangoCairoShapeRendererFunc</span></a>
pango_cairo_context_get_shape_renderer
                               (<em class="parameter"><code><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> *context</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> *data</code></em>);</pre>
<p>Sets callback function for context to use for rendering attributes
of type <a class="link" href="pango-Text-Attributes.html#PANGO-ATTR-SHAPE:CAPS"><code class="literal">PANGO_ATTR_SHAPE</code></a>.  See <a class="link" href="pango-Cairo-Rendering.html#PangoCairoShapeRendererFunc" title="PangoCairoShapeRendererFunc ()"><span class="type">PangoCairoShapeRendererFunc</span></a> for
details.</p>
<p>Retrieves callback function and associated user data for rendering
attributes of type <a class="link" href="pango-Text-Attributes.html#PANGO-ATTR-SHAPE:CAPS"><code class="literal">PANGO_ATTR_SHAPE</code></a> as set by
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-context-set-shape-renderer" title="pango_cairo_context_set_shape_renderer ()"><code class="function">pango_cairo_context_set_shape_renderer()</code></a>, if any.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="pango-cairo-context-get-shape-renderer.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>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>, from a pangocairo font map</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>Pointer to <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> to return user data</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-context-get-shape-renderer.returns"></a><h4>Returns</h4>
<p> the shape rendering callback previously
set on the context, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if no shape rendering callback have
been set. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-18.html#api-index-1.18">1.18</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-create-context"></a><h3>pango_cairo_create_context ()</h3>
<pre class="programlisting"><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="returnvalue">PangoContext</span></a> *
pango_cairo_create_context (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>);</pre>
<p>Creates a context object set up to match the current transformation
and target surface of the Cairo context.  This context can then be
used to create a layout using <a class="link" href="pango-Layout-Objects.html#pango-layout-new" title="pango_layout_new ()"><code class="function">pango_layout_new()</code></a>.</p>
<p>This function is a convenience function that creates a context using
the default font map, then updates it to <em class="parameter"><code>cr</code></em>
.  If you just need to
create a layout for use with <em class="parameter"><code>cr</code></em>
 and do not need to access <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>
directly, you can use <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-create-layout" title="pango_cairo_create_layout ()"><code class="function">pango_cairo_create_layout()</code></a> instead.</p>
<div class="refsect3">
<a name="pango-cairo-create-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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-create-context.returns"></a><h4>Returns</h4>
<p> the newly created <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>. Free with
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-22.html#api-index-1.22">1.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-update-context"></a><h3>pango_cairo_update_context ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_update_context (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                            <em class="parameter"><code><a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> *context</code></em>);</pre>
<p>Updates a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> previously created for use with Cairo to
match the current transformation and target surface of a Cairo
context. If any layouts have been created for the context,
it's necessary to call <a class="link" href="pango-Layout-Objects.html#pango-layout-context-changed" title="pango_layout_context_changed ()"><code class="function">pango_layout_context_changed()</code></a> on those
layouts.</p>
<div class="refsect3">
<a name="pango-cairo-update-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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a>, from a pangocairo font map</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-create-layout"></a><h3>pango_cairo_create_layout ()</h3>
<pre class="programlisting"><a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="returnvalue">PangoLayout</span></a> *
pango_cairo_create_layout (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>);</pre>
<p>Creates a layout object set up to match the current transformation
and target surface of the Cairo context.  This layout can then be
used for text measurement with functions like
<a class="link" href="pango-Layout-Objects.html#pango-layout-get-size" title="pango_layout_get_size ()"><code class="function">pango_layout_get_size()</code></a> or drawing with functions like
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-show-layout" title="pango_cairo_show_layout ()"><code class="function">pango_cairo_show_layout()</code></a>. If you change the transformation
or target surface for <em class="parameter"><code>cr</code></em>
, you need to call <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-update-layout" title="pango_cairo_update_layout ()"><code class="function">pango_cairo_update_layout()</code></a></p>
<p>This function is the most convenient way to use Cairo with Pango,
however it is slightly inefficient since it creates a separate
<a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> object for each layout. This might matter in an
application that was laying out large amounts of text.</p>
<div class="refsect3">
<a name="pango-cairo-create-layout.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="pango-cairo-create-layout.returns"></a><h4>Returns</h4>
<p> the newly created <a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a>. Free with
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-unref"><code class="function">g_object_unref()</code></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-update-layout"></a><h3>pango_cairo_update_layout ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_update_layout (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                           <em class="parameter"><code><a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a> *layout</code></em>);</pre>
<p>Updates the private <a class="link" href="pango-Text-Processing.html#PangoContext"><span class="type">PangoContext</span></a> of a <a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a> created with
<a class="link" href="pango-Cairo-Rendering.html#pango-cairo-create-layout" title="pango_cairo_create_layout ()"><code class="function">pango_cairo_create_layout()</code></a> to match the current transformation
and target surface of a Cairo context.</p>
<div class="refsect3">
<a name="pango-cairo-update-layout.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>layout</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a>, from <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-create-layout" title="pango_cairo_create_layout ()"><code class="function">pango_cairo_create_layout()</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-show-glyph-string"></a><h3>pango_cairo_show_glyph_string ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_show_glyph_string (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                               <em class="parameter"><code><a class="link" href="pango-Fonts.html#PangoFont"><span class="type">PangoFont</span></a> *font</code></em>,
                               <em class="parameter"><code><a class="link" href="pango-Glyph-Storage.html#PangoGlyphString"><span class="type">PangoGlyphString</span></a> *glyphs</code></em>);</pre>
<p>Draws the glyphs in <em class="parameter"><code>glyphs</code></em>
 in the specified cairo context.
The origin of the glyphs (the left edge of the baseline) will
be drawn at the current point of the cairo context.</p>
<div class="refsect3">
<a name="pango-cairo-show-glyph-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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>font</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Fonts.html#PangoFont"><span class="type">PangoFont</span></a> from a <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>glyphs</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Glyph-Storage.html#PangoGlyphString"><span class="type">PangoGlyphString</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-show-glyph-item"></a><h3>pango_cairo_show_glyph_item ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_show_glyph_item (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                             <em class="parameter"><code>const <span class="type">char</span> *text</code></em>,
                             <em class="parameter"><code><a class="link" href="pango-Glyph-Storage.html#PangoGlyphItem"><span class="type">PangoGlyphItem</span></a> *glyph_item</code></em>);</pre>
<p>Draws the glyphs in <em class="parameter"><code>glyph_item</code></em>
 in the specified cairo context,
embedding the text associated with the glyphs in the output if the
output format supports it (PDF for example), otherwise it acts
similar to <a class="link" href="pango-Cairo-Rendering.html#pango-cairo-show-glyph-string" title="pango_cairo_show_glyph_string ()"><code class="function">pango_cairo_show_glyph_string()</code></a>.</p>
<p>The origin of the glyphs (the left edge of the baseline) will
be drawn at the current point of the cairo context.</p>
<p>Note that <em class="parameter"><code>text</code></em>
 is the start of the text for layout, which is then
indexed by <code class="literal"><em class="parameter"><code>glyph_item-&gt;item-&gt;offset</code></em>
</code>.</p>
<div class="refsect3">
<a name="pango-cairo-show-glyph-item.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>text</p></td>
<td class="parameter_description"><p>the UTF-8 text that <em class="parameter"><code>glyph_item</code></em>
refers to</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>glyph_item</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Glyph-Storage.html#PangoGlyphItem"><span class="type">PangoGlyphItem</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-22.html#api-index-1.22">1.22</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-show-layout-line"></a><h3>pango_cairo_show_layout_line ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_show_layout_line (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                              <em class="parameter"><code><a class="link" href="pango-Layout-Objects.html#PangoLayoutLine"><span class="type">PangoLayoutLine</span></a> *line</code></em>);</pre>
<p>Draws a <a class="link" href="pango-Layout-Objects.html#PangoLayoutLine"><span class="type">PangoLayoutLine</span></a> in the specified cairo context.
The origin of the glyphs (the left edge of the line) will
be drawn at the current point of the cairo context.</p>
<div class="refsect3">
<a name="pango-cairo-show-layout-line.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>line</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Layout-Objects.html#PangoLayoutLine"><span class="type">PangoLayoutLine</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-show-layout"></a><h3>pango_cairo_show_layout ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_show_layout (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                         <em class="parameter"><code><a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a> *layout</code></em>);</pre>
<p>Draws a <a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a> in the specified cairo context.
The top-left corner of the <a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a> will be drawn
at the current point of the cairo context.</p>
<div class="refsect3">
<a name="pango-cairo-show-layout.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>layout</p></td>
<td class="parameter_description"><p>a Pango layout</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-show-error-underline"></a><h3>pango_cairo_show_error_underline ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_show_error_underline (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                                  <em class="parameter"><code><span class="type">double</span> x</code></em>,
                                  <em class="parameter"><code><span class="type">double</span> y</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>Draw a squiggly line in the specified cairo context that approximately
covers the given rectangle in the style of an underline used to indicate a
spelling error.  (The width of the underline is rounded to an integer
number of up/down segments and the resulting rectangle is centered in the
original rectangle)</p>
<div class="refsect3">
<a name="pango-cairo-show-error-underline.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>x</p></td>
<td class="parameter_description"><p>The X coordinate of one corner of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>y</p></td>
<td class="parameter_description"><p>The Y coordinate of one corner of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>Non-negative width of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>Non-negative height of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-14.html#api-index-1.14">1.14</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-glyph-string-path"></a><h3>pango_cairo_glyph_string_path ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_glyph_string_path (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                               <em class="parameter"><code><a class="link" href="pango-Fonts.html#PangoFont"><span class="type">PangoFont</span></a> *font</code></em>,
                               <em class="parameter"><code><a class="link" href="pango-Glyph-Storage.html#PangoGlyphString"><span class="type">PangoGlyphString</span></a> *glyphs</code></em>);</pre>
<p>Adds the glyphs in <em class="parameter"><code>glyphs</code></em>
 to the current path in the specified
cairo context. The origin of the glyphs (the left edge of the baseline)
will be at the current point of the cairo context.</p>
<div class="refsect3">
<a name="pango-cairo-glyph-string-path.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>font</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Fonts.html#PangoFont"><span class="type">PangoFont</span></a> from a <a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>glyphs</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Glyph-Storage.html#PangoGlyphString"><span class="type">PangoGlyphString</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-layout-line-path"></a><h3>pango_cairo_layout_line_path ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_layout_line_path (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                              <em class="parameter"><code><a class="link" href="pango-Layout-Objects.html#PangoLayoutLine"><span class="type">PangoLayoutLine</span></a> *line</code></em>);</pre>
<p>Adds the text in <a class="link" href="pango-Layout-Objects.html#PangoLayoutLine"><span class="type">PangoLayoutLine</span></a> to the current path in the
specified cairo context.  The origin of the glyphs (the left edge
of the line) will be at the current point of the cairo context.</p>
<div class="refsect3">
<a name="pango-cairo-layout-line-path.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>line</p></td>
<td class="parameter_description"><p>a <a class="link" href="pango-Layout-Objects.html#PangoLayoutLine"><span class="type">PangoLayoutLine</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-layout-path"></a><h3>pango_cairo_layout_path ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_layout_path (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                         <em class="parameter"><code><a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a> *layout</code></em>);</pre>
<p>Adds the text in a <a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a> to the current path in the
specified cairo context.  The top-left corner of the <a class="link" href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a>
will be at the current point of the cairo context.</p>
<div class="refsect3">
<a name="pango-cairo-layout-path.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>layout</p></td>
<td class="parameter_description"><p>a Pango layout</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="pango-cairo-error-underline-path"></a><h3>pango_cairo_error_underline_path ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
pango_cairo_error_underline_path (<em class="parameter"><code><span class="type">cairo_t</span> *cr</code></em>,
                                  <em class="parameter"><code><span class="type">double</span> x</code></em>,
                                  <em class="parameter"><code><span class="type">double</span> y</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>Add a squiggly line to the current path in the specified cairo context that
approximately covers the given rectangle in the style of an underline used
to indicate a spelling error.  (The width of the underline is rounded to an
integer number of up/down segments and the resulting rectangle is centered
in the original rectangle)</p>
<div class="refsect3">
<a name="pango-cairo-error-underline-path.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>cr</p></td>
<td class="parameter_description"><p>a Cairo context</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>x</p></td>
<td class="parameter_description"><p>The X coordinate of one corner of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>y</p></td>
<td class="parameter_description"><p>The Y coordinate of one corner of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>width</p></td>
<td class="parameter_description"><p>Non-negative width of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>height</p></td>
<td class="parameter_description"><p>Non-negative height of the rectangle</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-1-14.html#api-index-1.14">1.14</a></p>
</div>
</div>
<div class="refsect1">
<a name="pango-Cairo-Rendering.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="PangoCairoFont-struct"></a><h3>PangoCairoFont</h3>
<pre class="programlisting">typedef struct _PangoCairoFont PangoCairoFont;</pre>
<p><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFont"><span class="type">PangoCairoFont</span></a> is an interface exported by fonts for
use with Cairo. The actual type of the font will depend
on the particular font technology Cairo was compiled to use.</p>
<p class="since">Since: <a class="link" href="api-index-1-18.html#api-index-1.18">1.18</a></p>
</div>
<hr>
<div class="refsect2">
<a name="PangoCairoFontMap-struct"></a><h3>PangoCairoFontMap</h3>
<pre class="programlisting">typedef struct _PangoCairoFontMap PangoCairoFontMap;</pre>
<p><a class="link" href="pango-Cairo-Rendering.html#PangoCairoFontMap"><span class="type">PangoCairoFontMap</span></a> is an interface exported by font maps for
use with Cairo. The actual type of the font map will depend
on the particular font technology Cairo was compiled to use.</p>
<p class="since">Since: <a class="link" href="api-index-1-10.html#api-index-1.10">1.10</a></p>
</div>
</div>
</div>
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