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<h2><span class="refentrytitle"><a name="cairo-Types.top_of_page"></a>Types</span></h2>
<p>Types — Generic data types</p>
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<a name="cairo-Types.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">typedef <a class="link" href="cairo-Types.html#cairo-bool-t" title="cairo_bool_t">cairo_bool_t</a>;
<a class="link" href="cairo-Types.html#cairo-user-data-key-t" title="cairo_user_data_key_t">cairo_user_data_key_t</a>;
<span class="returnvalue">void</span> (<a class="link" href="cairo-Types.html#cairo-destroy-func-t" title="cairo_destroy_func_t ()">*cairo_destroy_func_t</a>) (<em class="parameter"><code><span class="type">void</span> *data</code></em>);
<a class="link" href="cairo-Types.html#cairo-rectangle-int-t" title="cairo_rectangle_int_t">cairo_rectangle_int_t</a>;
</pre>
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<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>
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<a name="cairo-Types.details"></a><h2>Details</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>
<p>
</p>
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<td class="listing_lines" align="right"><pre>1
2
3</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="keyword">if</span> <span class="gtkdoc opt">(</span><span class="function"><a href="../cairo/cairo-cairo-t.html#cairo-in-stroke">cairo_in_stroke</a></span> <span class="gtkdoc opt">(</span>cr<span class="gtkdoc opt">,</span> x<span class="gtkdoc opt">,</span> y<span class="gtkdoc opt">)) {</span>
<span class="comment">/* do something */</span>
<span class="gtkdoc opt">}</span></pre></td>
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<p>
</p>
<p class="since">Since 1.0</p>
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<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>
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<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="cairo-user-data-key-t.unused"></a>unused</code></em>;</span></p></td>
<td>not used; ignore.</td>
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<p class="since">Since 1.0</p>
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<hr>
<div class="refsect2">
<a name="cairo-destroy-func-t"></a><h3>cairo_destroy_func_t ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*cairo_destroy_func_t) (<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>
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<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td>
<td>The data element being destroyed.</td>
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<p class="since">Since 1.0</p>
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<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>
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<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.x"></a>x</code></em>;</span></p></td>
<td>X coordinate of the left side of the rectangle</td>
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<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.y"></a>y</code></em>;</span></p></td>
<td>Y coordinate of the the top side of the rectangle</td>
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<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.width"></a>width</code></em>;</span></p></td>
<td>width of the rectangle</td>
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<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="cairo-rectangle-int-t.height"></a>height</code></em>;</span></p></td>
<td>height of the rectangle</td>
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<p class="since">Since 1.10</p>
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