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Diffstat (limited to 'libs/cairo-1.16.0/doc/public/xml/cairo-device.xml')
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diff --git a/libs/cairo-1.16.0/doc/public/xml/cairo-device.xml b/libs/cairo-1.16.0/doc/public/xml/cairo-device.xml deleted file mode 100644 index b3f77eb..0000000 --- a/libs/cairo-1.16.0/doc/public/xml/cairo-device.xml +++ /dev/null @@ -1,585 +0,0 @@ -<?xml version='1.0' encoding='UTF-8'?> -<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" - "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [ -<!ENTITY version SYSTEM "version.xml"> -]> -<refentry id="cairo-cairo-device-t"> -<refmeta> -<refentrytitle role="top_of_page" id="cairo-cairo-device-t.top_of_page">cairo_device_t</refentrytitle> -<manvolnum>3</manvolnum> -<refmiscinfo>CAIRO Library</refmiscinfo> -</refmeta> -<refnamediv> -<refname>cairo_device_t</refname> -<refpurpose>interface to underlying rendering system</refpurpose> -</refnamediv> - -<refsect1 id="cairo-cairo-device-t.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-device-t"><returnvalue>cairo_device_t</returnvalue></link> * -</entry><entry role="function_name"><link linkend="cairo-device-reference">cairo_device_reference</link> <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-device-destroy">cairo_device_destroy</link> <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-device-status">cairo_device_status</link> <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-device-finish">cairo_device_finish</link> <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-device-flush">cairo_device_flush</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type"><link linkend="cairo-device-type-t"><returnvalue>cairo_device_type_t</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-get-type">cairo_device_get_type</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type">unsigned <link linkend="int"><returnvalue>int</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-get-reference-count">cairo_device_get_reference_count</link> <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-device-set-user-data">cairo_device_set_user_data</link> <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-device-get-user-data">cairo_device_get_user_data</link> <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-device-acquire">cairo_device_acquire</link> <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-device-release">cairo_device_release</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type"><link linkend="double"><returnvalue>double</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-observer-elapsed">cairo_device_observer_elapsed</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type"><link linkend="double"><returnvalue>double</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-observer-fill-elapsed">cairo_device_observer_fill_elapsed</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type"><link linkend="double"><returnvalue>double</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-observer-glyphs-elapsed">cairo_device_observer_glyphs_elapsed</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type"><link linkend="double"><returnvalue>double</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-observer-mask-elapsed">cairo_device_observer_mask_elapsed</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type"><link linkend="double"><returnvalue>double</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-observer-paint-elapsed">cairo_device_observer_paint_elapsed</link> <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-device-observer-print">cairo_device_observer_print</link> <phrase role="c_punctuation">()</phrase></entry></row> -<row><entry role="function_type"><link linkend="double"><returnvalue>double</returnvalue></link> -</entry><entry role="function_name"><link linkend="cairo-device-observer-stroke-elapsed">cairo_device_observer_stroke_elapsed</link> <phrase role="c_punctuation">()</phrase></entry></row> - -</tbody> -</tgroup> -</informaltable> -</refsect1> -<refsect1 id="cairo-cairo-device-t.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-device-t">cairo_device_t</link></entry></row> -<row><entry role="datatype_keyword">enum</entry><entry role="function_name"><link linkend="cairo-device-type-t">cairo_device_type_t</link></entry></row> - -</tbody> -</tgroup> -</informaltable> -</refsect1> - - -<refsect1 id="cairo-cairo-device-t.description" role="desc"> -<title role="desc.title">Description</title> -<para>Devices are the abstraction Cairo employs for the rendering system -used by a <link linkend="cairo-surface-t"><type>cairo_surface_t</type></link>. You can get the device of a surface using -<link linkend="cairo-surface-get-device"><function>cairo_surface_get_device()</function></link>.</para> -<para>Devices are created using custom functions specific to the rendering -system you want to use. See the documentation for the surface types -for those functions.</para> -<para>An important function that devices fulfill is sharing access to the -rendering system between Cairo and your application. If you want to -access a device directly that you used to draw to with Cairo, you must -first call <link linkend="cairo-device-flush"><function>cairo_device_flush()</function></link> to ensure that Cairo finishes all -operations on the device and resets it to a clean state.</para> -<para>Cairo also provides the functions <link linkend="cairo-device-acquire"><function>cairo_device_acquire()</function></link> and -<link linkend="cairo-device-release"><function>cairo_device_release()</function></link> to synchronize access to the rendering system -in a multithreaded environment. This is done internally, but can also -be used by applications.</para> -<para>Putting this all together, a function that works with devices should -look something like this:</para> -<informalexample><programlisting> -void -my_device_modifying_function (cairo_device_t *device) -{ - cairo_status_t status; - - // Ensure the device is properly reset - cairo_device_flush (device); - // Try to acquire the device - status = cairo_device_acquire (device); - if (status != CAIRO_STATUS_SUCCESS) { - printf ("Failed to acquire the device: %s\n", cairo_status_to_string (status)); - return; - } - - // Do the custom operations on the device here. - // But do not call any Cairo functions that might acquire devices. - - // Release the device when done. - cairo_device_release (device); -} -</programlisting></informalexample> -<note><para>Please refer to the documentation of each backend for -additional usage requirements, guarantees provided, and -interactions with existing surface API of the device functions for -surfaces of that type. -</para></note> - -</refsect1> -<refsect1 id="cairo-cairo-device-t.functions_details" role="details"> -<title role="details.title">Functions</title> -<refsect2 id="cairo-device-reference" role="function" condition="since:1.10"> -<title>cairo_device_reference ()</title> -<indexterm zone="cairo-device-reference" role="1.10"><primary sortas="device_reference">cairo_device_reference</primary></indexterm> -<programlisting language="C"><link linkend="cairo-device-t"><returnvalue>cairo_device_t</returnvalue></link> * -cairo_device_reference (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>Increases the reference count on <parameter>device</parameter> - by one. This prevents -<parameter>device</parameter> - from being destroyed until a matching call to -<link linkend="cairo-device-destroy"><function>cairo_device_destroy()</function></link> is made.</para> -<para>Use <link linkend="cairo-device-get-reference-count"><function>cairo_device_get_reference_count()</function></link> to get the number of references -to a <link linkend="cairo-device-t"><type>cairo_device_t</type></link>.</para> -<refsect3 id="cairo-device-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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -</tbody></tgroup></informaltable> -</refsect3><refsect3 id="cairo-device-reference.returns" role="returns"> -<title>Returns</title> -<para> the referenced <link linkend="cairo-device-t"><type>cairo_device_t</type></link>.</para> -</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-destroy" role="function" condition="since:1.10"> -<title>cairo_device_destroy ()</title> -<indexterm zone="cairo-device-destroy" role="1.10"><primary sortas="device_destroy">cairo_device_destroy</primary></indexterm> -<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link> -cairo_device_destroy (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>Decreases the reference count on <parameter>device</parameter> - by one. If the result is -zero, then <parameter>device</parameter> - and all associated resources are freed. See -<link linkend="cairo-device-reference"><function>cairo_device_reference()</function></link>.</para> -<para>This function may acquire devices if the last reference was dropped.</para> -<refsect3 id="cairo-device-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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_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-device-status" role="function" condition="since:1.10"> -<title>cairo_device_status ()</title> -<indexterm zone="cairo-device-status" role="1.10"><primary sortas="device_status">cairo_device_status</primary></indexterm> -<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link> -cairo_device_status (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>Checks whether an error has previously occurred for this -device.</para> -<refsect3 id="cairo-device-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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -</tbody></tgroup></informaltable> -</refsect3><refsect3 id="cairo-device-status.returns" role="returns"> -<title>Returns</title> -<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> on success or an error code if -the device is in an error state.</para> -</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-finish" role="function" condition="since:1.10"> -<title>cairo_device_finish ()</title> -<indexterm zone="cairo-device-finish" role="1.10"><primary sortas="device_finish">cairo_device_finish</primary></indexterm> -<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link> -cairo_device_finish (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>This function finishes the device and drops all references to -external resources. All surfaces, fonts and other objects created -for this <parameter>device</parameter> - will be finished, too. -Further operations on the <parameter>device</parameter> - will not affect the <parameter>device</parameter> - but -will instead trigger a <link linkend="CAIRO-STATUS-DEVICE-FINISHED:CAPS"><literal>CAIRO_STATUS_DEVICE_FINISHED</literal></link> error.</para> -<para>When the last call to <link linkend="cairo-device-destroy"><function>cairo_device_destroy()</function></link> decreases the -reference count to zero, cairo will call <link linkend="cairo-device-finish"><function>cairo_device_finish()</function></link> if -it hasn't been called already, before freeing the resources -associated with the device.</para> -<para>This function may acquire devices.</para> -<refsect3 id="cairo-device-finish.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>device</para></entry> -<entry role="parameter_description"><para>the <link linkend="cairo-device-t"><type>cairo_device_t</type></link> to finish</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-device-flush" role="function" condition="since:1.10"> -<title>cairo_device_flush ()</title> -<indexterm zone="cairo-device-flush" role="1.10"><primary sortas="device_flush">cairo_device_flush</primary></indexterm> -<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link> -cairo_device_flush (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>Finish any pending operations for the device and also restore any -temporary modifications cairo has made to the device's state. -This function must be called before switching from using the -device with Cairo to operating on it directly with native APIs. -If the device doesn't support direct access, then this function -does nothing.</para> -<para>This function may acquire devices.</para> -<refsect3 id="cairo-device-flush.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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_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-device-get-type" role="function" condition="since:1.10"> -<title>cairo_device_get_type ()</title> -<indexterm zone="cairo-device-get-type" role="1.10"><primary sortas="device_get_type">cairo_device_get_type</primary></indexterm> -<programlisting language="C"><link linkend="cairo-device-type-t"><returnvalue>cairo_device_type_t</returnvalue></link> -cairo_device_get_type (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>This function returns the type of the device. See <link linkend="cairo-device-type-t"><type>cairo_device_type_t</type></link> -for available types.</para> -<refsect3 id="cairo-device-get-type.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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -</tbody></tgroup></informaltable> -</refsect3><refsect3 id="cairo-device-get-type.returns" role="returns"> -<title>Returns</title> -<para> The type of <parameter>device</parameter> -.</para> -</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-get-reference-count" role="function" condition="since:1.10"> -<title>cairo_device_get_reference_count ()</title> -<indexterm zone="cairo-device-get-reference-count" role="1.10"><primary sortas="device_get_reference_count">cairo_device_get_reference_count</primary></indexterm> -<programlisting language="C">unsigned <link linkend="int"><returnvalue>int</returnvalue></link> -cairo_device_get_reference_count (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>Returns the current reference count of <parameter>device</parameter> -.</para> -<refsect3 id="cairo-device-get-reference-count.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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -</tbody></tgroup></informaltable> -</refsect3><refsect3 id="cairo-device-get-reference-count.returns" role="returns"> -<title>Returns</title> -<para> the current reference count of <parameter>device</parameter> -. If the -object is a nil object, 0 will be returned.</para> -</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-set-user-data" role="function" condition="since:1.10"> -<title>cairo_device_set_user_data ()</title> -<indexterm zone="cairo-device-set-user-data" role="1.10"><primary sortas="device_set_user_data">cairo_device_set_user_data</primary></indexterm> -<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link> -cairo_device_set_user_data (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>, - <parameter>const <link linkend="cairo-user-data-key-t"><type>cairo_user_data_key_t</type></link> *key</parameter>, - <parameter><link linkend="void"><type>void</type></link> *user_data</parameter>, - <parameter><link linkend="cairo-destroy-func-t"><type>cairo_destroy_func_t</type></link> destroy</parameter>);</programlisting> -<para>Attach user data to <parameter>device</parameter> -. To remove user data from a surface, -call this function with the key that was used to set it and <link linkend="NULL:CAPS"><literal>NULL</literal></link> -for <parameter>data</parameter> -.</para> -<refsect3 id="cairo-device-set-user-data.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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -<row><entry role="parameter_name"><para>key</para></entry> -<entry role="parameter_description"><para>the address of a <link linkend="cairo-user-data-key-t"><type>cairo_user_data_key_t</type></link> to attach the user data to</para></entry> -<entry role="parameter_annotations"></entry></row> -<row><entry role="parameter_name"><para>user_data</para></entry> -<entry role="parameter_description"><para>the user data to attach to the <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -<row><entry role="parameter_name"><para>destroy</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-destroy-func-t"><type>cairo_destroy_func_t</type></link> which will be called when the -<link linkend="cairo-t"><type>cairo_t</type></link> is destroyed or when new user data is attached using the -same key.</para></entry> -<entry role="parameter_annotations"></entry></row> -</tbody></tgroup></informaltable> -</refsect3><refsect3 id="cairo-device-set-user-data.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> if a -slot could not be allocated for the user data.</para> -</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-get-user-data" role="function" condition="since:1.10"> -<title>cairo_device_get_user_data ()</title> -<indexterm zone="cairo-device-get-user-data" role="1.10"><primary sortas="device_get_user_data">cairo_device_get_user_data</primary></indexterm> -<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link> * -cairo_device_get_user_data (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>, - <parameter>const <link linkend="cairo-user-data-key-t"><type>cairo_user_data_key_t</type></link> *key</parameter>);</programlisting> -<para>Return user data previously attached to <parameter>device</parameter> - using the -specified key. If no user data has been attached with the given -key this function returns <link linkend="NULL:CAPS"><literal>NULL</literal></link>.</para> -<refsect3 id="cairo-device-get-user-data.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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -<row><entry role="parameter_name"><para>key</para></entry> -<entry role="parameter_description"><para>the address of the <link linkend="cairo-user-data-key-t"><type>cairo_user_data_key_t</type></link> the user data was -attached to</para></entry> -<entry role="parameter_annotations"></entry></row> -</tbody></tgroup></informaltable> -</refsect3><refsect3 id="cairo-device-get-user-data.returns" role="returns"> -<title>Returns</title> -<para> the user data previously attached or <link linkend="NULL:CAPS"><literal>NULL</literal></link>.</para> -</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-acquire" role="function" condition="since:1.10"> -<title>cairo_device_acquire ()</title> -<indexterm zone="cairo-device-acquire" role="1.10"><primary sortas="device_acquire">cairo_device_acquire</primary></indexterm> -<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link> -cairo_device_acquire (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>Acquires the <parameter>device</parameter> - for the current thread. This function will block -until no other thread has acquired the device.</para> -<para>If the return value is <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link>, you successfully acquired the -device. From now on your thread owns the device and no other thread will be -able to acquire it until a matching call to <link linkend="cairo-device-release"><function>cairo_device_release()</function></link>. It is -allowed to recursively acquire the device multiple times from the same -thread.</para> -<note><para>You must never acquire two different devices at the same time -unless this is explicitly allowed. Otherwise the possibility of deadlocks -exist. - -As various Cairo functions can acquire devices when called, these functions -may also cause deadlocks when you call them with an acquired device. So you -must not have a device acquired when calling them. These functions are -marked in the documentation. -</para></note> -<refsect3 id="cairo-device-acquire.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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_t</type></link></para></entry> -<entry role="parameter_annotations"></entry></row> -</tbody></tgroup></informaltable> -</refsect3><refsect3 id="cairo-device-acquire.returns" role="returns"> -<title>Returns</title> -<para> <link linkend="CAIRO-STATUS-SUCCESS:CAPS"><literal>CAIRO_STATUS_SUCCESS</literal></link> on success or an error code if -the device is in an error state and could not be -acquired. After a successful call to <link linkend="cairo-device-acquire"><function>cairo_device_acquire()</function></link>, -a matching call to <link linkend="cairo-device-release"><function>cairo_device_release()</function></link> is required.</para> -</refsect3><para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-release" role="function" condition="since:1.10"> -<title>cairo_device_release ()</title> -<indexterm zone="cairo-device-release" role="1.10"><primary sortas="device_release">cairo_device_release</primary></indexterm> -<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link> -cairo_device_release (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -<para>Releases a <parameter>device</parameter> - previously acquired using <link linkend="cairo-device-acquire"><function>cairo_device_acquire()</function></link>. See -that function for details.</para> -<refsect3 id="cairo-device-release.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>device</para></entry> -<entry role="parameter_description"><para>a <link linkend="cairo-device-t"><type>cairo_device_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-device-observer-elapsed" role="function"> -<title>cairo_device_observer_elapsed ()</title> -<indexterm zone="cairo-device-observer-elapsed"><primary sortas="device_observer_elapsed">cairo_device_observer_elapsed</primary></indexterm> -<programlisting language="C"><link linkend="double"><returnvalue>double</returnvalue></link> -cairo_device_observer_elapsed (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -</refsect2> -<refsect2 id="cairo-device-observer-fill-elapsed" role="function"> -<title>cairo_device_observer_fill_elapsed ()</title> -<indexterm zone="cairo-device-observer-fill-elapsed"><primary sortas="device_observer_fill_elapsed">cairo_device_observer_fill_elapsed</primary></indexterm> -<programlisting language="C"><link linkend="double"><returnvalue>double</returnvalue></link> -cairo_device_observer_fill_elapsed (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -</refsect2> -<refsect2 id="cairo-device-observer-glyphs-elapsed" role="function"> -<title>cairo_device_observer_glyphs_elapsed ()</title> -<indexterm zone="cairo-device-observer-glyphs-elapsed"><primary sortas="device_observer_glyphs_elapsed">cairo_device_observer_glyphs_elapsed</primary></indexterm> -<programlisting language="C"><link linkend="double"><returnvalue>double</returnvalue></link> -cairo_device_observer_glyphs_elapsed (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -</refsect2> -<refsect2 id="cairo-device-observer-mask-elapsed" role="function"> -<title>cairo_device_observer_mask_elapsed ()</title> -<indexterm zone="cairo-device-observer-mask-elapsed"><primary sortas="device_observer_mask_elapsed">cairo_device_observer_mask_elapsed</primary></indexterm> -<programlisting language="C"><link linkend="double"><returnvalue>double</returnvalue></link> -cairo_device_observer_mask_elapsed (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -</refsect2> -<refsect2 id="cairo-device-observer-paint-elapsed" role="function"> -<title>cairo_device_observer_paint_elapsed ()</title> -<indexterm zone="cairo-device-observer-paint-elapsed"><primary sortas="device_observer_paint_elapsed">cairo_device_observer_paint_elapsed</primary></indexterm> -<programlisting language="C"><link linkend="double"><returnvalue>double</returnvalue></link> -cairo_device_observer_paint_elapsed (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -</refsect2> -<refsect2 id="cairo-device-observer-print" role="function"> -<title>cairo_device_observer_print ()</title> -<indexterm zone="cairo-device-observer-print"><primary sortas="device_observer_print">cairo_device_observer_print</primary></indexterm> -<programlisting language="C"><link linkend="cairo-status-t"><returnvalue>cairo_status_t</returnvalue></link> -cairo_device_observer_print (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>, - <parameter><link linkend="cairo-write-func-t"><type>cairo_write_func_t</type></link> write_func</parameter>, - <parameter><link linkend="void"><type>void</type></link> *closure</parameter>);</programlisting> -</refsect2> -<refsect2 id="cairo-device-observer-stroke-elapsed" role="function"> -<title>cairo_device_observer_stroke_elapsed ()</title> -<indexterm zone="cairo-device-observer-stroke-elapsed"><primary sortas="device_observer_stroke_elapsed">cairo_device_observer_stroke_elapsed</primary></indexterm> -<programlisting language="C"><link linkend="double"><returnvalue>double</returnvalue></link> -cairo_device_observer_stroke_elapsed (<parameter><link linkend="cairo-device-t"><type>cairo_device_t</type></link> *device</parameter>);</programlisting> -</refsect2> - -</refsect1> -<refsect1 id="cairo-cairo-device-t.other_details" role="details"> -<title role="details.title">Types and Values</title> -<refsect2 id="cairo-device-t" role="typedef" condition="since:1.10"> -<title>cairo_device_t</title> -<indexterm zone="cairo-device-t" role="1.10"><primary sortas="device_t">cairo_device_t</primary></indexterm> -<programlisting language="C">typedef struct _cairo_device cairo_device_t; -</programlisting> -<para>A <link linkend="cairo-device-t"><type>cairo_device_t</type></link> represents the driver interface for drawing -operations to a <link linkend="cairo-surface-t"><type>cairo_surface_t</type></link>. There are different subtypes of -<link linkend="cairo-device-t"><type>cairo_device_t</type></link> for different drawing backends; for example, -<link linkend="cairo-egl-device-create"><function>cairo_egl_device_create()</function></link> creates a device that wraps an EGL display and -context.</para> -<para>The type of a device can be queried with <link linkend="cairo-device-get-type"><function>cairo_device_get_type()</function></link>.</para> -<para>Memory management of <link linkend="cairo-device-t"><type>cairo_device_t</type></link> is done with -<link linkend="cairo-device-reference"><function>cairo_device_reference()</function></link> and <link linkend="cairo-device-destroy"><function>cairo_device_destroy()</function></link>.</para> -<para role="since">Since: <link linkend="api-index-1.10">1.10</link></para></refsect2> -<refsect2 id="cairo-device-type-t" role="enum" condition="since:1.10"> -<title>enum cairo_device_type_t</title> -<indexterm zone="cairo-device-type-t" role="1.10"><primary sortas="device_type_t">cairo_device_type_t</primary></indexterm> -<para><link linkend="cairo-device-type-t"><type>cairo_device_type_t</type></link> is used to describe the type of a given -device. The devices types are also known as "backends" within cairo.</para> -<para>The device type can be queried with <link linkend="cairo-device-get-type"><function>cairo_device_get_type()</function></link></para> -<para>The various <link linkend="cairo-device-t"><type>cairo_device_t</type></link> functions can be used with devices of -any type, but some backends also provide type-specific functions -that must only be called with a device of the appropriate -type. These functions have names that begin with -<literal>cairo_<emphasis>type</emphasis>_device</literal> such as -<link linkend="cairo-xcb-device-debug-cap-xrender-version"><function>cairo_xcb_device_debug_cap_xrender_version()</function></link>.</para> -<para>The behavior of calling a type-specific function with a device of -the wrong type is undefined.</para> -<para>New entries may be added in future versions.</para> -<refsect3 id="cairo-device-type-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-DEVICE-TYPE-DRM:CAPS">CAIRO_DEVICE_TYPE_DRM</para></entry> -<entry role="enum_member_description"><para>The device is of type Direct Render Manager, since 1.10</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-GL:CAPS">CAIRO_DEVICE_TYPE_GL</para></entry> -<entry role="enum_member_description"><para>The device is of type OpenGL, since 1.10</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-SCRIPT:CAPS">CAIRO_DEVICE_TYPE_SCRIPT</para></entry> -<entry role="enum_member_description"><para>The device is of type script, since 1.10</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-XCB:CAPS">CAIRO_DEVICE_TYPE_XCB</para></entry> -<entry role="enum_member_description"><para>The device is of type xcb, since 1.10</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-XLIB:CAPS">CAIRO_DEVICE_TYPE_XLIB</para></entry> -<entry role="enum_member_description"><para>The device is of type xlib, since 1.10</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-XML:CAPS">CAIRO_DEVICE_TYPE_XML</para></entry> -<entry role="enum_member_description"><para>The device is of type XML, since 1.10</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-COGL:CAPS">CAIRO_DEVICE_TYPE_COGL</para></entry> -<entry role="enum_member_description"><para>The device is of type cogl, since 1.12</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-WIN32:CAPS">CAIRO_DEVICE_TYPE_WIN32</para></entry> -<entry role="enum_member_description"><para>The device is of type win32, since 1.12</para> -</entry> -<entry role="enum_member_annotations"></entry> -</row> -<row role="constant"><entry role="enum_member_name"><para id="CAIRO-DEVICE-TYPE-INVALID:CAPS">CAIRO_DEVICE_TYPE_INVALID</para></entry> -<entry role="enum_member_description"><para>The device is invalid, 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> -<refsect1 id="cairo-cairo-device-t.see-also"> -<title>See Also</title> -<para><link linkend="cairo-surface-t"><type>cairo_surface_t</type></link></para> - -</refsect1> - -</refentry> |