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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>Types: 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-support.html" title="Utilities"> <link rel="prev" href="cairo-Version-Information.html" title="Version Information"> <link rel="next" href="index-all.html" title="Index"> <meta name="generator" content="GTK-Doc V1.25 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </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-Types.description" class="shortcut">Description</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="cairo-support.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="cairo-Version-Information.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="index-all.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="cairo-Types"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="cairo-Types.top_of_page"></a>Types</span></h2> <p>Types — Generic data types</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="cairo-Types.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"> <span class="returnvalue">void</span> </td> <td class="function_name"> <span class="c_punctuation">(</span><a class="link" href="cairo-Types.html#cairo-destroy-func-t" title="cairo_destroy_func_t ()">*cairo_destroy_func_t</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span> </td> </tr></tbody> </table></div> </div> <div class="refsect1"> <a name="cairo-Types.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="typedef_keyword">typedef</td> <td class="function_name"><a class="link" href="cairo-Types.html#cairo-bool-t" title="cairo_bool_t">cairo_bool_t</a></td> </tr> <tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="cairo-Types.html#cairo-user-data-key-t" title="cairo_user_data_key_t">cairo_user_data_key_t</a></td> </tr> <tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="cairo-Types.html#cairo-rectangle-int-t" title="cairo_rectangle_int_t">cairo_rectangle_int_t</a></td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="cairo-Types.description"></a><h2>Description</h2> <p>This section lists generic data types used in the cairo API.</p> </div> <div class="refsect1"> <a name="cairo-Types.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="cairo-destroy-func-t"></a><h3>cairo_destroy_func_t ()</h3> <pre class="programlisting"><span class="returnvalue">void</span> <span class="c_punctuation">(</span>*cairo_destroy_func_t<span class="c_punctuation">)</span> (<em class="parameter"><code><span class="type">void</span> *data</code></em>);</pre> <p><a class="link" href="cairo-Types.html#cairo-destroy-func-t" title="cairo_destroy_func_t ()"><span class="type">cairo_destroy_func_t</span></a> the type of function which is called when a data element is destroyed. It is passed the pointer to the data element and should free any memory and resources allocated for it.</p> <div class="refsect3"> <a name="cairo-destroy-func-t.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>data</p></td> <td class="parameter_description"><p>The data element being destroyed.</p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <p class="since">Since: 1.0</p> </div> </div> <div class="refsect1"> <a name="cairo-Types.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="cairo-bool-t"></a><h3>cairo_bool_t</h3> <pre class="programlisting">typedef int cairo_bool_t; </pre> <p><a class="link" href="cairo-Types.html#cairo-bool-t" title="cairo_bool_t"><span class="type">cairo_bool_t</span></a> is used for boolean values. Returns of type <a class="link" href="cairo-Types.html#cairo-bool-t" title="cairo_bool_t"><span class="type">cairo_bool_t</span></a> will always be either 0 or 1, but testing against these values explicitly is not encouraged; just use the value as a boolean condition.</p> <div class="informalexample"><pre class="programlisting"> if (cairo_in_stroke (cr, x, y)) { /* do something */ } </pre></div> <p class="since">Since: 1.0</p> </div> <hr> <div class="refsect2"> <a name="cairo-user-data-key-t"></a><h3>cairo_user_data_key_t</h3> <pre class="programlisting">typedef struct { int unused; } cairo_user_data_key_t; </pre> <p><a class="link" href="cairo-Types.html#cairo-user-data-key-t" title="cairo_user_data_key_t"><span class="type">cairo_user_data_key_t</span></a> is used for attaching user data to cairo data structures. The actual contents of the struct is never used, and there is no need to initialize the object; only the unique address of a <span class="type">cairo_data_key_t</span> object is used. Typically, you would just use the address of a static <span class="type">cairo_data_key_t</span> object.</p> <div class="refsect3"> <a name="cairo-user-data-key-t.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="struct_members_name"> <col class="struct_members_description"> <col width="200px" class="struct_members_annotations"> </colgroup> <tbody><tr> <td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-user-data-key-t.unused"></a>unused</code></em>;</p></td> <td class="struct_member_description"><p>not used; ignore.</p></td> <td class="struct_member_annotations"> </td> </tr></tbody> </table></div> </div> <p class="since">Since: 1.0</p> </div> <hr> <div class="refsect2"> <a name="cairo-rectangle-int-t"></a><h3>cairo_rectangle_int_t</h3> <pre class="programlisting">typedef struct { int x, y; int width, height; } cairo_rectangle_int_t; </pre> <p>A data structure for holding a rectangle with integer coordinates.</p> <div class="refsect3"> <a name="cairo-rectangle-int-t.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="struct_members_name"> <col class="struct_members_description"> <col width="200px" class="struct_members_annotations"> </colgroup> <tbody> <tr> <td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.x"></a>x</code></em>;</p></td> <td class="struct_member_description"><p>X coordinate of the left side of the rectangle</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.y"></a>y</code></em>;</p></td> <td class="struct_member_description"><p>Y coordinate of the the top side of the rectangle</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.width"></a>width</code></em>;</p></td> <td class="struct_member_description"><p>width of the rectangle</p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.height"></a>height</code></em>;</p></td> <td class="struct_member_description"><p>height of the rectangle</p></td> <td class="struct_member_annotations"> </td> </tr> </tbody> </table></div> </div> <p class="since">Since: 1.10</p> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.25</div> </body> </html>