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<refentry id="cairo-Regions">
<refmeta>
<refentrytitle role="top_of_page" id="cairo-Regions.top_of_page">Regions</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>CAIRO Library</refmiscinfo>
</refmeta>
<refnamediv>
<refname>Regions</refname>
<refpurpose>Representing a pixel-aligned area</refpurpose>
</refnamediv>

<refsect1 id="cairo-Regions.functions" role="functions_proto">
<title role="functions_proto.title">Functions</title>
<informaltable pgwide="1" frame="none">
<tgroup cols="2">
<colspec colname="functions_return" colwidth="150px"/>
<colspec colname="functions_name"/>
<tbody>
<row><entry role="function_type"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-region-create">cairo_region_create</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-region-create-rectangle">cairo_region_create_rectangle</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-region-create-rectangles">cairo_region_create_rectangles</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-region-copy">cairo_region_copy</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-region-reference">cairo_region_reference</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="void"><returnvalue>void</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-destroy">cairo_region_destroy</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-status">cairo_region_status</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="void"><returnvalue>void</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-get-extents">cairo_region_get_extents</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="int"><returnvalue>int</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-num-rectangles">cairo_region_num_rectangles</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="void"><returnvalue>void</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-get-rectangle">cairo_region_get_rectangle</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-bool-t"><returnvalue>cairo_bool_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-is-empty">cairo_region_is_empty</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-bool-t"><returnvalue>cairo_bool_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-contains-point">cairo_region_contains_point</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-region-overlap-t"><returnvalue>cairo_region_overlap_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-contains-rectangle">cairo_region_contains_rectangle</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-bool-t"><returnvalue>cairo_bool_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-equal">cairo_region_equal</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="void"><returnvalue>void</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-translate">cairo_region_translate</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-intersect">cairo_region_intersect</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-intersect-rectangle">cairo_region_intersect_rectangle</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-subtract">cairo_region_subtract</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-subtract-rectangle">cairo_region_subtract_rectangle</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-union">cairo_region_union</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-union-rectangle">cairo_region_union_rectangle</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-xor">cairo_region_xor</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-region-xor-rectangle">cairo_region_xor_rectangle</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>

</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 id="cairo-Regions.other" role="other_proto">
<title role="other_proto.title">Types and Values</title>
<informaltable role="enum_members_table" pgwide="1" frame="none">
<tgroup cols="2">
<colspec colname="name" colwidth="150px"/>
<colspec colname="description"/>
<tbody>
<row><entry role="typedef_keyword">typedef</entry><entry role="function_name"><link linkend="cairo-region-t">cairo_region_t</link></entry></row>
<row><entry role="datatype_keyword">enum</entry><entry role="function_name"><link linkend="cairo-region-overlap-t">cairo_region_overlap_t</link></entry></row>

</tbody>
</tgroup>
</informaltable>
</refsect1>


<refsect1 id="cairo-Regions.description" role="desc">
<title role="desc.title">Description</title>
<para>Regions are a simple graphical data type representing an area of 
integer-aligned rectangles. They are often used on raster surfaces 
to track areas of interest, such as change or clip areas.</para>

</refsect1>
<refsect1 id="cairo-Regions.functions_details" role="details">
<title role="details.title">Functions</title>
<refsect2 id="cairo-region-create" role="function" condition="since:1.10">
<title>cairo_region_create&#160;()</title>
<indexterm zone="cairo-region-create" role="1.10"><primary sortas="region_create">cairo_region_create</primary></indexterm>
<programlisting language="C"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
cairo_region_create (<parameter><type>void</type></parameter>);</programlisting>
<para>Allocates a new empty region object.</para>
<refsect3 id="cairo-region-create.returns" role="returns">
<title>Returns</title>
<para> A newly allocated <link linkend="cairo-region-t"><type>cairo_region_t</type></link>. Free with
<link linkend="cairo-region-destroy"><function>cairo_region_destroy()</function></link>. This function always returns a
valid pointer; if memory cannot be allocated, then a special
error object is returned where all operations on the object do nothing.
You can check for this with <link linkend="cairo-region-status"><function>cairo_region_status()</function></link>.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-create-rectangle" role="function" condition="since:1.10">
<title>cairo_region_create_rectangle&#160;()</title>
<indexterm zone="cairo-region-create-rectangle" role="1.10"><primary sortas="region_create_rectangle">cairo_region_create_rectangle</primary></indexterm>
<programlisting language="C"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
cairo_region_create_rectangle (<parameter>const <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rectangle</parameter>);</programlisting>
<para>Allocates a new region object containing <parameter>rectangle</parameter>
.</para>
<refsect3 id="cairo-region-create-rectangle.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>rectangle</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-create-rectangle.returns" role="returns">
<title>Returns</title>
<para> A newly allocated <link linkend="cairo-region-t"><type>cairo_region_t</type></link>. Free with
<link linkend="cairo-region-destroy"><function>cairo_region_destroy()</function></link>. This function always returns a
valid pointer; if memory cannot be allocated, then a special
error object is returned where all operations on the object do nothing.
You can check for this with <link linkend="cairo-region-status"><function>cairo_region_status()</function></link>.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-create-rectangles" role="function" condition="since:1.10">
<title>cairo_region_create_rectangles&#160;()</title>
<indexterm zone="cairo-region-create-rectangles" role="1.10"><primary sortas="region_create_rectangles">cairo_region_create_rectangles</primary></indexterm>
<programlisting language="C"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
cairo_region_create_rectangles (<parameter>const <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rects</parameter>,
                                <parameter><link linkend="int"><type>int</type></link> count</parameter>);</programlisting>
<para>Allocates a new region object containing the union of all given <parameter>rects</parameter>
.</para>
<refsect3 id="cairo-region-create-rectangles.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>rects</para></entry>
<entry role="parameter_description"><para>an array of <parameter>count</parameter>
rectangles</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>count</para></entry>
<entry role="parameter_description"><para>number of rectangles</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-create-rectangles.returns" role="returns">
<title>Returns</title>
<para> A newly allocated <link linkend="cairo-region-t"><type>cairo_region_t</type></link>. Free with
<link linkend="cairo-region-destroy"><function>cairo_region_destroy()</function></link>. This function always returns a
valid pointer; if memory cannot be allocated, then a special
error object is returned where all operations on the object do nothing.
You can check for this with <link linkend="cairo-region-status"><function>cairo_region_status()</function></link>.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-copy" role="function" condition="since:1.10">
<title>cairo_region_copy&#160;()</title>
<indexterm zone="cairo-region-copy" role="1.10"><primary sortas="region_copy">cairo_region_copy</primary></indexterm>
<programlisting language="C"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
cairo_region_copy (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *original</parameter>);</programlisting>
<para>Allocates a new region object copying the area from <parameter>original</parameter>
.</para>
<refsect3 id="cairo-region-copy.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>original</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-copy.returns" role="returns">
<title>Returns</title>
<para> A newly allocated <link linkend="cairo-region-t"><type>cairo_region_t</type></link>. Free with
<link linkend="cairo-region-destroy"><function>cairo_region_destroy()</function></link>. This function always returns a
valid pointer; if memory cannot be allocated, then a special
error object is returned where all operations on the object do nothing.
You can check for this with <link linkend="cairo-region-status"><function>cairo_region_status()</function></link>.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-reference" role="function" condition="since:1.10">
<title>cairo_region_reference&#160;()</title>
<indexterm zone="cairo-region-reference" role="1.10"><primary sortas="region_reference">cairo_region_reference</primary></indexterm>
<programlisting language="C"><link linkend="cairo-region-t"><returnvalue>cairo_region_t</returnvalue></link>&#160;*
cairo_region_reference (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>);</programlisting>
<para>Increases the reference count on <parameter>region</parameter>
 by one. This prevents
<parameter>region</parameter>
 from being destroyed until a matching call to
<link linkend="cairo-region-destroy"><function>cairo_region_destroy()</function></link> is made.</para>
<refsect3 id="cairo-region-reference.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-reference.returns" role="returns">
<title>Returns</title>
<para> the referenced <link linkend="cairo-region-t"><type>cairo_region_t</type></link>.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-destroy" role="function" condition="since:1.10">
<title>cairo_region_destroy&#160;()</title>
<indexterm zone="cairo-region-destroy" role="1.10"><primary sortas="region_destroy">cairo_region_destroy</primary></indexterm>
<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link>
cairo_region_destroy (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>);</programlisting>
<para>Destroys a <link linkend="cairo-region-t"><type>cairo_region_t</type></link> object created with
<link linkend="cairo-region-create"><function>cairo_region_create()</function></link>, <link linkend="cairo-region-copy"><function>cairo_region_copy()</function></link>, or
or <link linkend="cairo-region-create-rectangle"><function>cairo_region_create_rectangle()</function></link>.</para>
<refsect3 id="cairo-region-destroy.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-status" role="function" condition="since:1.10">
<title>cairo_region_status&#160;()</title>
<indexterm zone="cairo-region-status" role="1.10"><primary sortas="region_status">cairo_region_status</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_status (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>);</programlisting>
<para>Checks whether an error has previous occurred for this
region object.</para>
<refsect3 id="cairo-region-status.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-status.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-get-extents" role="function" condition="since:1.10">
<title>cairo_region_get_extents&#160;()</title>
<indexterm zone="cairo-region-get-extents" role="1.10"><primary sortas="region_get_extents">cairo_region_get_extents</primary></indexterm>
<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link>
cairo_region_get_extents (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>,
                          <parameter><link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *extents</parameter>);</programlisting>
<para>Gets the bounding rectangle of <parameter>region</parameter>
 as a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para>
<refsect3 id="cairo-region-get-extents.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>extents</para></entry>
<entry role="parameter_description"><para>rectangle into which to store the extents</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-num-rectangles" role="function" condition="since:1.10">
<title>cairo_region_num_rectangles&#160;()</title>
<indexterm zone="cairo-region-num-rectangles" role="1.10"><primary sortas="region_num_rectangles">cairo_region_num_rectangles</primary></indexterm>
<programlisting language="C"><link linkend="int"><returnvalue>int</returnvalue></link>
cairo_region_num_rectangles (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>);</programlisting>
<para>Returns the number of rectangles contained in <parameter>region</parameter>
.</para>
<refsect3 id="cairo-region-num-rectangles.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-num-rectangles.returns" role="returns">
<title>Returns</title>
<para> The number of rectangles contained in <parameter>region</parameter>
.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-get-rectangle" role="function" condition="since:1.10">
<title>cairo_region_get_rectangle&#160;()</title>
<indexterm zone="cairo-region-get-rectangle" role="1.10"><primary sortas="region_get_rectangle">cairo_region_get_rectangle</primary></indexterm>
<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link>
cairo_region_get_rectangle (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>,
                            <parameter><link linkend="int"><type>int</type></link> nth</parameter>,
                            <parameter><link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rectangle</parameter>);</programlisting>
<para>Stores the <parameter>nth</parameter>
 rectangle from the region in <parameter>rectangle</parameter>
.</para>
<refsect3 id="cairo-region-get-rectangle.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>nth</para></entry>
<entry role="parameter_description"><para>a number indicating which rectangle should be returned</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>rectangle</para></entry>
<entry role="parameter_description"><para>return location for a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-is-empty" role="function" condition="since:1.10">
<title>cairo_region_is_empty&#160;()</title>
<indexterm zone="cairo-region-is-empty" role="1.10"><primary sortas="region_is_empty">cairo_region_is_empty</primary></indexterm>
<programlisting language="C"><link linkend="cairo-bool-t"><returnvalue>cairo_bool_t</returnvalue></link>
cairo_region_is_empty (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>);</programlisting>
<para>Checks whether <parameter>region</parameter>
 is empty.</para>
<refsect3 id="cairo-region-is-empty.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-is-empty.returns" role="returns">
<title>Returns</title>
<para> <link linkend="TRUE:CAPS"><literal>TRUE</literal></link> if <parameter>region</parameter>
is empty, <link linkend="FALSE:CAPS"><literal>FALSE</literal></link> if it isn't.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-contains-point" role="function" condition="since:1.10">
<title>cairo_region_contains_point&#160;()</title>
<indexterm zone="cairo-region-contains-point" role="1.10"><primary sortas="region_contains_point">cairo_region_contains_point</primary></indexterm>
<programlisting language="C"><link linkend="cairo-bool-t"><returnvalue>cairo_bool_t</returnvalue></link>
cairo_region_contains_point (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>,
                             <parameter><link linkend="int"><type>int</type></link> x</parameter>,
                             <parameter><link linkend="int"><type>int</type></link> y</parameter>);</programlisting>
<para>Checks whether (<parameter>x</parameter>
, <parameter>y</parameter>
) is contained in <parameter>region</parameter>
.</para>
<refsect3 id="cairo-region-contains-point.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>x</para></entry>
<entry role="parameter_description"><para>the x coordinate of a point</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>y</para></entry>
<entry role="parameter_description"><para>the y coordinate of a point</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-contains-point.returns" role="returns">
<title>Returns</title>
<para> <link linkend="TRUE:CAPS"><literal>TRUE</literal></link> if (<parameter>x</parameter>
, <parameter>y</parameter>
) is contained in <parameter>region</parameter>
, <link linkend="FALSE:CAPS"><literal>FALSE</literal></link> if it is not.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-contains-rectangle" role="function" condition="since:1.10">
<title>cairo_region_contains_rectangle&#160;()</title>
<indexterm zone="cairo-region-contains-rectangle" role="1.10"><primary sortas="region_contains_rectangle">cairo_region_contains_rectangle</primary></indexterm>
<programlisting language="C"><link linkend="cairo-region-overlap-t"><returnvalue>cairo_region_overlap_t</returnvalue></link>
cairo_region_contains_rectangle (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>,
                                 <parameter>const <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rectangle</parameter>);</programlisting>
<para>Checks whether <parameter>rectangle</parameter>
 is inside, outside or partially contained
in <parameter>region</parameter>
</para>
<refsect3 id="cairo-region-contains-rectangle.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>rectangle</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-contains-rectangle.returns" role="returns">
<title>Returns</title>
<para>  <link linkend="CAIRO-REGION-OVERLAP-IN:CAPS"><literal>CAIRO_REGION_OVERLAP_IN</literal></link> if <parameter>rectangle</parameter>
is entirely inside <parameter>region</parameter>
,
<link linkend="CAIRO-REGION-OVERLAP-OUT:CAPS"><literal>CAIRO_REGION_OVERLAP_OUT</literal></link> if <parameter>rectangle</parameter>
is entirely outside <parameter>region</parameter>
, or
<link linkend="CAIRO-REGION-OVERLAP-PART:CAPS"><literal>CAIRO_REGION_OVERLAP_PART</literal></link> if <parameter>rectangle</parameter>
is partially inside and partially outside <parameter>region</parameter>
.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-equal" role="function" condition="since:1.10">
<title>cairo_region_equal&#160;()</title>
<indexterm zone="cairo-region-equal" role="1.10"><primary sortas="region_equal">cairo_region_equal</primary></indexterm>
<programlisting language="C"><link linkend="cairo-bool-t"><returnvalue>cairo_bool_t</returnvalue></link>
cairo_region_equal (<parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *a</parameter>,
                    <parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *b</parameter>);</programlisting>
<para>Compares whether region_a is equivalent to region_b. <link linkend="NULL:CAPS"><literal>NULL</literal></link> as an argument
is equal to itself, but not to any non-<link linkend="NULL:CAPS"><literal>NULL</literal></link> region.</para>
<refsect3 id="cairo-region-equal.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>a</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link> or <link linkend="NULL:CAPS"><literal>NULL</literal></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>b</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link> or <link linkend="NULL:CAPS"><literal>NULL</literal></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-equal.returns" role="returns">
<title>Returns</title>
<para> <link linkend="TRUE:CAPS"><literal>TRUE</literal></link> if both regions contained the same coverage,
<link linkend="FALSE:CAPS"><literal>FALSE</literal></link> if it is not or any region is in an error status.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-translate" role="function" condition="since:1.10">
<title>cairo_region_translate&#160;()</title>
<indexterm zone="cairo-region-translate" role="1.10"><primary sortas="region_translate">cairo_region_translate</primary></indexterm>
<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link>
cairo_region_translate (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *region</parameter>,
                        <parameter><link linkend="int"><type>int</type></link> dx</parameter>,
                        <parameter><link linkend="int"><type>int</type></link> dy</parameter>);</programlisting>
<para>Translates <parameter>region</parameter>
 by (<parameter>dx</parameter>
, <parameter>dy</parameter>
).</para>
<refsect3 id="cairo-region-translate.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>region</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>dx</para></entry>
<entry role="parameter_description"><para>Amount to translate in the x direction</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>dy</para></entry>
<entry role="parameter_description"><para>Amount to translate in the y direction</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-intersect" role="function" condition="since:1.10">
<title>cairo_region_intersect&#160;()</title>
<indexterm zone="cairo-region-intersect" role="1.10"><primary sortas="region_intersect">cairo_region_intersect</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_intersect (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                        <parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *other</parameter>);</programlisting>
<para>Computes the intersection of <parameter>dst</parameter>
 with <parameter>other</parameter>
 and places the result in <parameter>dst</parameter>
</para>
<refsect3 id="cairo-region-intersect.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>other</para></entry>
<entry role="parameter_description"><para>another <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-intersect.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-intersect-rectangle" role="function" condition="since:1.10">
<title>cairo_region_intersect_rectangle&#160;()</title>
<indexterm zone="cairo-region-intersect-rectangle" role="1.10"><primary sortas="region_intersect_rectangle">cairo_region_intersect_rectangle</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_intersect_rectangle (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                                  <parameter>const <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rectangle</parameter>);</programlisting>
<para>Computes the intersection of <parameter>dst</parameter>
 with <parameter>rectangle</parameter>
 and places the
result in <parameter>dst</parameter>
</para>
<refsect3 id="cairo-region-intersect-rectangle.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>rectangle</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-intersect-rectangle.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-subtract" role="function" condition="since:1.10">
<title>cairo_region_subtract&#160;()</title>
<indexterm zone="cairo-region-subtract" role="1.10"><primary sortas="region_subtract">cairo_region_subtract</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_subtract (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                       <parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *other</parameter>);</programlisting>
<para>Subtracts <parameter>other</parameter>
 from <parameter>dst</parameter>
 and places the result in <parameter>dst</parameter>
</para>
<refsect3 id="cairo-region-subtract.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>other</para></entry>
<entry role="parameter_description"><para>another <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-subtract.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-subtract-rectangle" role="function" condition="since:1.10">
<title>cairo_region_subtract_rectangle&#160;()</title>
<indexterm zone="cairo-region-subtract-rectangle" role="1.10"><primary sortas="region_subtract_rectangle">cairo_region_subtract_rectangle</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_subtract_rectangle (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                                 <parameter>const <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rectangle</parameter>);</programlisting>
<para>Subtracts <parameter>rectangle</parameter>
 from <parameter>dst</parameter>
 and places the result in <parameter>dst</parameter>
</para>
<refsect3 id="cairo-region-subtract-rectangle.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>rectangle</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-subtract-rectangle.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-union" role="function" condition="since:1.10">
<title>cairo_region_union&#160;()</title>
<indexterm zone="cairo-region-union" role="1.10"><primary sortas="region_union">cairo_region_union</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_union (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                    <parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *other</parameter>);</programlisting>
<para>Computes the union of <parameter>dst</parameter>
 with <parameter>other</parameter>
 and places the result in <parameter>dst</parameter>
</para>
<refsect3 id="cairo-region-union.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>other</para></entry>
<entry role="parameter_description"><para>another <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-union.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-union-rectangle" role="function" condition="since:1.10">
<title>cairo_region_union_rectangle&#160;()</title>
<indexterm zone="cairo-region-union-rectangle" role="1.10"><primary sortas="region_union_rectangle">cairo_region_union_rectangle</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_union_rectangle (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                              <parameter>const <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rectangle</parameter>);</programlisting>
<para>Computes the union of <parameter>dst</parameter>
 with <parameter>rectangle</parameter>
 and places the result in <parameter>dst</parameter>
.</para>
<refsect3 id="cairo-region-union-rectangle.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>rectangle</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-union-rectangle.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-xor" role="function" condition="since:1.10">
<title>cairo_region_xor&#160;()</title>
<indexterm zone="cairo-region-xor" role="1.10"><primary sortas="region_xor">cairo_region_xor</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_xor (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                  <parameter>const <link linkend="cairo-region-t"><type>cairo_region_t</type></link> *other</parameter>);</programlisting>
<para>Computes the exclusive difference of <parameter>dst</parameter>
 with <parameter>other</parameter>
 and places the
result in <parameter>dst</parameter>
. That is, <parameter>dst</parameter>
 will be set to contain all areas that
are either in <parameter>dst</parameter>
 or in <parameter>other</parameter>
, but not in both.</para>
<refsect3 id="cairo-region-xor.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>other</para></entry>
<entry role="parameter_description"><para>another <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-xor.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-xor-rectangle" role="function" condition="since:1.10">
<title>cairo_region_xor_rectangle&#160;()</title>
<indexterm zone="cairo-region-xor-rectangle" role="1.10"><primary sortas="region_xor_rectangle">cairo_region_xor_rectangle</primary></indexterm>
<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link>
cairo_region_xor_rectangle (<parameter><link linkend="cairo-region-t"><type>cairo_region_t</type></link> *dst</parameter>,
                            <parameter>const <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link> *rectangle</parameter>);</programlisting>
<para>Computes the exclusive difference of <parameter>dst</parameter>
 with <parameter>rectangle</parameter>
 and places the
result in <parameter>dst</parameter>
. That is, <parameter>dst</parameter>
 will be set to contain all areas that are 
either in <parameter>dst</parameter>
 or in <parameter>rectangle</parameter>
, but not in both.</para>
<refsect3 id="cairo-region-xor-rectangle.parameters" role="parameters">
<title>Parameters</title>
<informaltable role="parameters_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="parameters_name" colwidth="150px"/>
<colspec colname="parameters_description"/>
<colspec colname="parameters_annotations" colwidth="200px"/>
<tbody>
<row><entry role="parameter_name"><para>dst</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-region-t"><type>cairo_region_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>rectangle</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-rectangle-int-t"><type>cairo_rectangle_int_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-region-xor-rectangle.returns" role="returns">
<title>Returns</title>
<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> or <link linkend="CAIRO-STATUS-NO-MEMORY:CAPS"><literal>CAIRO_STATUS_NO_MEMORY</literal></link></para>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>

</refsect1>
<refsect1 id="cairo-Regions.other_details" role="details">
<title role="details.title">Types and Values</title>
<refsect2 id="cairo-region-t" role="typedef" condition="since:1.10">
<title>cairo_region_t</title>
<indexterm zone="cairo-region-t" role="1.10"><primary sortas="region_t">cairo_region_t</primary></indexterm>
<programlisting language="C">typedef struct _cairo_region cairo_region_t;
</programlisting>
<para>A <link linkend="cairo-region-t"><type>cairo_region_t</type></link> represents a set of integer-aligned rectangles.</para>
<para>It allows set-theoretical operations like <link linkend="cairo-region-union"><function>cairo_region_union()</function></link> and
<link linkend="cairo-region-intersect"><function>cairo_region_intersect()</function></link> to be performed on them.</para>
<para>Memory management of <link linkend="cairo-region-t"><type>cairo_region_t</type></link> is done with
<link linkend="cairo-region-reference"><function>cairo_region_reference()</function></link> and <link linkend="cairo-region-destroy"><function>cairo_region_destroy()</function></link>.</para>
<para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>
<refsect2 id="cairo-region-overlap-t" role="enum" condition="since:1.10">
<title>enum cairo_region_overlap_t</title>
<indexterm zone="cairo-region-overlap-t" role="1.10"><primary sortas="region_overlap_t">cairo_region_overlap_t</primary></indexterm>
<para>Used as the return value for <link linkend="cairo-region-contains-rectangle"><function>cairo_region_contains_rectangle()</function></link>.</para>
<refsect3 id="cairo-region-overlap-t.members" role="enum_members">
<title>Members</title>
<informaltable role="enum_members_table" pgwide="1" frame="none">
<tgroup cols="3">
<colspec colname="enum_members_name" colwidth="300px"/>
<colspec colname="enum_members_description"/>
<colspec colname="enum_members_annotations" colwidth="200px"/>
<tbody>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-REGION-OVERLAP-IN:CAPS">CAIRO_REGION_OVERLAP_IN</para></entry>
<entry role="enum_member_description"><para>The contents are entirely inside the region. (Since 1.10)</para>
</entry>
<entry role="enum_member_annotations"></entry>
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-REGION-OVERLAP-OUT:CAPS">CAIRO_REGION_OVERLAP_OUT</para></entry>
<entry role="enum_member_description"><para>The contents are entirely outside the region. (Since 1.10)</para>
</entry>
<entry role="enum_member_annotations"></entry>
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-REGION-OVERLAP-PART:CAPS">CAIRO_REGION_OVERLAP_PART</para></entry>
<entry role="enum_member_description"><para>The contents are partially inside and
    partially outside the region. (Since 1.10)</para>
</entry>
<entry role="enum_member_annotations"></entry>
</row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2>

</refsect1>

</refentry>
