path: root/libs/cairo-1.16.0/doc/public/xml/cairo-svg.xml

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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<!ENTITY version SYSTEM "version.xml">
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<refentry id="cairo-SVG-Surfaces">
<refmeta>
<refentrytitle role="top_of_page" id="cairo-SVG-Surfaces.top_of_page">SVG Surfaces</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>CAIRO Library</refmiscinfo>
</refmeta>
<refnamediv>
<refname>SVG Surfaces</refname>
<refpurpose>Rendering SVG documents</refpurpose>
</refnamediv>

<refsect1 id="cairo-SVG-Surfaces.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-surface-t"><returnvalue>cairo_surface_t</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-svg-surface-create">cairo_svg_surface_create</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-surface-t"><returnvalue>cairo_surface_t</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-svg-surface-create-for-stream">cairo_svg_surface_create_for_stream</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type"><link linkend="cairo-svg-unit-t"><returnvalue>cairo_svg_unit_t</returnvalue></link>
</entry><entry role="function_name"><link linkend="cairo-svg-surface-get-document-unit">cairo_svg_surface_get_document_unit</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-svg-surface-set-document-unit">cairo_svg_surface_set_document_unit</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-svg-surface-restrict-to-version">cairo_svg_surface_restrict_to_version</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-svg-get-versions">cairo_svg_get_versions</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>
<row><entry role="function_type">const <link linkend="char"><returnvalue>char</returnvalue></link>&#160;*
</entry><entry role="function_name"><link linkend="cairo-svg-version-to-string">cairo_svg_version_to_string</link>&#160;<phrase role="c_punctuation">()</phrase></entry></row>

</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 id="cairo-SVG-Surfaces.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="define_keyword">#define</entry><entry role="function_name"><link linkend="CAIRO-HAS-SVG-SURFACE:CAPS">CAIRO_HAS_SVG_SURFACE</link></entry></row>
<row><entry role="datatype_keyword">enum</entry><entry role="function_name"><link linkend="cairo-svg-version-t">cairo_svg_version_t</link></entry></row>
<row><entry role="datatype_keyword">enum</entry><entry role="function_name"><link linkend="cairo-svg-unit-t">cairo_svg_unit_t</link></entry></row>

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


<refsect1 id="cairo-SVG-Surfaces.description" role="desc">
<title role="desc.title">Description</title>
<para>The SVG surface is used to render cairo graphics to
SVG files and is a multi-page vector surface backend.</para>

</refsect1>
<refsect1 id="cairo-SVG-Surfaces.functions_details" role="details">
<title role="details.title">Functions</title>
<refsect2 id="cairo-svg-surface-create" role="function" condition="since:1.2">
<title>cairo_svg_surface_create&#160;()</title>
<indexterm zone="cairo-svg-surface-create" role="1.2"><primary sortas="svg_surface_create">cairo_svg_surface_create</primary></indexterm>
<programlisting language="C"><link linkend="cairo-surface-t"><returnvalue>cairo_surface_t</returnvalue></link>&#160;*
cairo_svg_surface_create (<parameter>const <link linkend="char"><type>char</type></link> *filename</parameter>,
                          <parameter><link linkend="double"><type>double</type></link> width_in_points</parameter>,
                          <parameter><link linkend="double"><type>double</type></link> height_in_points</parameter>);</programlisting>
<para>Creates a SVG surface of the specified size in points to be written
to <parameter>filename</parameter>
.</para>
<para>The SVG surface backend recognizes the following MIME types for the
data attached to a surface (see <link linkend="cairo-surface-set-mime-data"><function>cairo_surface_set_mime_data()</function></link>) when
it is used as a source pattern for drawing on this surface:
<link linkend="CAIRO-MIME-TYPE-JPEG:CAPS"><literal>CAIRO_MIME_TYPE_JPEG</literal></link>, <link linkend="CAIRO-MIME-TYPE-PNG:CAPS"><literal>CAIRO_MIME_TYPE_PNG</literal></link>,
<link linkend="CAIRO-MIME-TYPE-URI:CAPS"><literal>CAIRO_MIME_TYPE_URI</literal></link>. If any of them is specified, the SVG backend
emits a href with the content of MIME data instead of a surface
snapshot (PNG, Base64-encoded) in the corresponding image tag.</para>
<para>The unofficial MIME type <link linkend="CAIRO-MIME-TYPE-URI:CAPS"><literal>CAIRO_MIME_TYPE_URI</literal></link> is examined
first. If present, the URI is emitted as is: assuring the
correctness of URI is left to the client code.</para>
<para>If <link linkend="CAIRO-MIME-TYPE-URI:CAPS"><literal>CAIRO_MIME_TYPE_URI</literal></link> is not present, but <link linkend="CAIRO-MIME-TYPE-JPEG:CAPS"><literal>CAIRO_MIME_TYPE_JPEG</literal></link>
or <link linkend="CAIRO-MIME-TYPE-PNG:CAPS"><literal>CAIRO_MIME_TYPE_PNG</literal></link> is specified, the corresponding data is
Base64-encoded and emitted.</para>
<para>If <link linkend="CAIRO-MIME-TYPE-UNIQUE-ID:CAPS"><literal>CAIRO_MIME_TYPE_UNIQUE_ID</literal></link> is present, all surfaces with the same
unique identifier will only be embedded once.</para>
<refsect3 id="cairo-svg-surface-create.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>filename</para></entry>
<entry role="parameter_description"><para>a filename for the SVG output (must be writable), <link linkend="NULL:CAPS"><literal>NULL</literal></link> may be
used to specify no output. This will generate a SVG surface that
may be queried and used as a source, without generating a
temporary file.</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>width_in_points</para></entry>
<entry role="parameter_description"><para>width of the surface, in points (1 point == 1/72.0 inch)</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>height_in_points</para></entry>
<entry role="parameter_description"><para>height of the surface, in points (1 point == 1/72.0 inch)</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-svg-surface-create.returns" role="returns">
<title>Returns</title>
<para> a pointer to the newly created surface. The caller
owns the surface and should call <link linkend="cairo-surface-destroy"><function>cairo_surface_destroy()</function></link> when done
with it.</para>
<para>This function always returns a valid pointer, but it will return a
pointer to a "nil" surface if an error such as out of memory
occurs. You can use <link linkend="cairo-surface-status"><function>cairo_surface_status()</function></link> to check for this.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.2">1.2</link></para></refsect2>
<refsect2 id="cairo-svg-surface-create-for-stream" role="function" condition="since:1.2">
<title>cairo_svg_surface_create_for_stream&#160;()</title>
<indexterm zone="cairo-svg-surface-create-for-stream" role="1.2"><primary sortas="svg_surface_create_for_stream">cairo_svg_surface_create_for_stream</primary></indexterm>
<programlisting language="C"><link linkend="cairo-surface-t"><returnvalue>cairo_surface_t</returnvalue></link>&#160;*
cairo_svg_surface_create_for_stream (<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>,
                                     <parameter><link linkend="double"><type>double</type></link> width_in_points</parameter>,
                                     <parameter><link linkend="double"><type>double</type></link> height_in_points</parameter>);</programlisting>
<para>Creates a SVG surface of the specified size in points to be written
incrementally to the stream represented by <parameter>write_func</parameter>
 and <parameter>closure</parameter>
.</para>
<refsect3 id="cairo-svg-surface-create-for-stream.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>write_func</para></entry>
<entry role="parameter_description"><para>a <link linkend="cairo-write-func-t"><type>cairo_write_func_t</type></link> to accept the output data, may be <link linkend="NULL:CAPS"><literal>NULL</literal></link>
to indicate a no-op <parameter>write_func</parameter>
. With a no-op <parameter>write_func</parameter>
,
the surface may be queried or used as a source without
generating any temporary files.</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>closure</para></entry>
<entry role="parameter_description"><para>the closure argument for <parameter>write_func</parameter>
</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>width_in_points</para></entry>
<entry role="parameter_description"><para>width of the surface, in points (1 point == 1/72.0 inch)</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>height_in_points</para></entry>
<entry role="parameter_description"><para>height of the surface, in points (1 point == 1/72.0 inch)</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-svg-surface-create-for-stream.returns" role="returns">
<title>Returns</title>
<para> a pointer to the newly created surface. The caller
owns the surface and should call <link linkend="cairo-surface-destroy"><function>cairo_surface_destroy()</function></link> when done
with it.</para>
<para>This function always returns a valid pointer, but it will return a
pointer to a "nil" surface if an error such as out of memory
occurs. You can use <link linkend="cairo-surface-status"><function>cairo_surface_status()</function></link> to check for this.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.2">1.2</link></para></refsect2>
<refsect2 id="cairo-svg-surface-get-document-unit" role="function" condition="since:1.16">
<title>cairo_svg_surface_get_document_unit&#160;()</title>
<indexterm zone="cairo-svg-surface-get-document-unit" role="1.16"><primary sortas="svg_surface_get_document_unit">cairo_svg_surface_get_document_unit</primary></indexterm>
<programlisting language="C"><link linkend="cairo-svg-unit-t"><returnvalue>cairo_svg_unit_t</returnvalue></link>
cairo_svg_surface_get_document_unit (<parameter><link linkend="cairo-surface-t"><type>cairo_surface_t</type></link> *surface</parameter>);</programlisting>
<para>Get the unit of the SVG surface.</para>
<para>If the surface passed as an argument is not a SVG surface, the function
sets the error status to CAIRO_STATUS_SURFACE_TYPE_MISMATCH and returns
CAIRO_SVG_UNIT_USER.</para>
<refsect3 id="cairo-svg-surface-get-document-unit.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>surface</para></entry>
<entry role="parameter_description"><para>a SVG <link linkend="cairo-surface-t"><type>cairo_surface_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-svg-surface-get-document-unit.returns" role="returns">
<title>Returns</title>
<para> the SVG unit of the SVG surface.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.16">1.16</link></para></refsect2>
<refsect2 id="cairo-svg-surface-set-document-unit" role="function" condition="since:1.16">
<title>cairo_svg_surface_set_document_unit&#160;()</title>
<indexterm zone="cairo-svg-surface-set-document-unit" role="1.16"><primary sortas="svg_surface_set_document_unit">cairo_svg_surface_set_document_unit</primary></indexterm>
<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link>
cairo_svg_surface_set_document_unit (<parameter><link linkend="cairo-surface-t"><type>cairo_surface_t</type></link> *surface</parameter>,
                                     <parameter><link linkend="cairo-svg-unit-t"><type>cairo_svg_unit_t</type></link> unit</parameter>);</programlisting>
<para>Use the specified unit for the width and height of the generated SVG file.
See <link linkend="cairo-svg-unit-t"><type>cairo_svg_unit_t</type></link> for a list of available unit values that can be used
here.</para>
<para>This function can be called at any time before generating the SVG file.</para>
<para>However to minimize the risk of ambiguities it's recommended to call it
before any drawing operations have been performed on the given surface, to
make it clearer what the unit used in the drawing operations is.</para>
<para>The simplest way to do this is to call this function immediately after
creating the SVG surface.</para>
<para>Note if this function is never called, the default unit for SVG documents
generated by cairo will be "pt". This is for historical reasons.</para>
<refsect3 id="cairo-svg-surface-set-document-unit.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>surface</para></entry>
<entry role="parameter_description"><para>a SVG <link linkend="cairo-surface-t"><type>cairo_surface_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>unit</para></entry>
<entry role="parameter_description"><para>SVG unit</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.16">1.16</link></para></refsect2>
<refsect2 id="cairo-svg-surface-restrict-to-version" role="function" condition="since:1.2">
<title>cairo_svg_surface_restrict_to_version&#160;()</title>
<indexterm zone="cairo-svg-surface-restrict-to-version" role="1.2"><primary sortas="svg_surface_restrict_to_version">cairo_svg_surface_restrict_to_version</primary></indexterm>
<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link>
cairo_svg_surface_restrict_to_version (<parameter><link linkend="cairo-surface-t"><type>cairo_surface_t</type></link> *surface</parameter>,
                                       <parameter><link linkend="cairo-svg-version-t"><type>cairo_svg_version_t</type></link> version</parameter>);</programlisting>
<para>Restricts the generated SVG file to <parameter>version</parameter>
. See <link linkend="cairo-svg-get-versions"><function>cairo_svg_get_versions()</function></link>
for a list of available version values that can be used here.</para>
<para>This function should only be called before any drawing operations
have been performed on the given surface. The simplest way to do
this is to call this function immediately after creating the
surface.</para>
<refsect3 id="cairo-svg-surface-restrict-to-version.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>surface</para></entry>
<entry role="parameter_description"><para>a SVG <link linkend="cairo-surface-t"><type>cairo_surface_t</type></link></para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>version</para></entry>
<entry role="parameter_description"><para>SVG version</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.2">1.2</link></para></refsect2>
<refsect2 id="cairo-svg-get-versions" role="function" condition="since:1.2">
<title>cairo_svg_get_versions&#160;()</title>
<indexterm zone="cairo-svg-get-versions" role="1.2"><primary sortas="svg_get_versions">cairo_svg_get_versions</primary></indexterm>
<programlisting language="C"><link linkend="void"><returnvalue>void</returnvalue></link>
cairo_svg_get_versions (<parameter><link linkend="cairo-svg-version-t"><type>cairo_svg_version_t</type></link> const **versions</parameter>,
                        <parameter><link linkend="int"><type>int</type></link> *num_versions</parameter>);</programlisting>
<para>Used to retrieve the list of supported versions. See
<link linkend="cairo-svg-surface-restrict-to-version"><function>cairo_svg_surface_restrict_to_version()</function></link>.</para>
<refsect3 id="cairo-svg-get-versions.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>versions</para></entry>
<entry role="parameter_description"><para>supported version list</para></entry>
<entry role="parameter_annotations"></entry></row>
<row><entry role="parameter_name"><para>num_versions</para></entry>
<entry role="parameter_description"><para>list length</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.2">1.2</link></para></refsect2>
<refsect2 id="cairo-svg-version-to-string" role="function" condition="since:1.2">
<title>cairo_svg_version_to_string&#160;()</title>
<indexterm zone="cairo-svg-version-to-string" role="1.2"><primary sortas="svg_version_to_string">cairo_svg_version_to_string</primary></indexterm>
<programlisting language="C">const <link linkend="char"><returnvalue>char</returnvalue></link>&#160;*
cairo_svg_version_to_string (<parameter><link linkend="cairo-svg-version-t"><type>cairo_svg_version_t</type></link> version</parameter>);</programlisting>
<para>Get the string representation of the given <parameter>version</parameter>
 id. This function
will return <link linkend="NULL:CAPS"><literal>NULL</literal></link> if <parameter>version</parameter>
 isn't valid. See <link linkend="cairo-svg-get-versions"><function>cairo_svg_get_versions()</function></link>
for a way to get the list of valid version ids.</para>
<refsect3 id="cairo-svg-version-to-string.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>version</para></entry>
<entry role="parameter_description"><para>a version id</para></entry>
<entry role="parameter_annotations"></entry></row>
</tbody></tgroup></informaltable>
</refsect3><refsect3 id="cairo-svg-version-to-string.returns" role="returns">
<title>Returns</title>
<para> the string associated to given version.</para>
</refsect3><para role="since">Since: <link linkend="api-index-1.2">1.2</link></para></refsect2>

</refsect1>
<refsect1 id="cairo-SVG-Surfaces.other_details" role="details">
<title role="details.title">Types and Values</title>
<refsect2 id="CAIRO-HAS-SVG-SURFACE:CAPS" role="macro" condition="since:1.2">
<title>CAIRO_HAS_SVG_SURFACE</title>
<indexterm zone="CAIRO-HAS-SVG-SURFACE:CAPS" role="1.2"><primary sortas="HAS_SVG_SURFACE">CAIRO_HAS_SVG_SURFACE</primary></indexterm>
<programlisting language="C">#define CAIRO_HAS_SVG_SURFACE 1
</programlisting>
<para>Defined if the SVG surface backend is available.
This macro can be used to conditionally compile backend-specific code.</para>
<para role="since">Since: <link linkend="api-index-1.2">1.2</link></para></refsect2>
<refsect2 id="cairo-svg-version-t" role="enum" condition="since:1.2">
<title>enum cairo_svg_version_t</title>
<indexterm zone="cairo-svg-version-t" role="1.2"><primary sortas="svg_version_t">cairo_svg_version_t</primary></indexterm>
<para><link linkend="cairo-svg-version-t"><type>cairo_svg_version_t</type></link> is used to describe the version number of the SVG
specification that a generated SVG file will conform to.</para>
<refsect3 id="cairo-svg-version-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-SVG-VERSION-1-1:CAPS">CAIRO_SVG_VERSION_1_1</para></entry>
<entry role="enum_member_description"><para>The version 1.1 of the SVG specification. (Since 1.2)</para>
</entry>
<entry role="enum_member_annotations"></entry>
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-VERSION-1-2:CAPS">CAIRO_SVG_VERSION_1_2</para></entry>
<entry role="enum_member_description"><para>The version 1.2 of the SVG specification. (Since 1.2)</para>
</entry>
<entry role="enum_member_annotations"></entry>
</row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.2">1.2</link></para></refsect2>
<refsect2 id="cairo-svg-unit-t" role="enum" condition="since:1.16">
<title>enum cairo_svg_unit_t</title>
<indexterm zone="cairo-svg-unit-t" role="1.16"><primary sortas="svg_unit_t">cairo_svg_unit_t</primary></indexterm>
<para><parameter>CAIRO_SVG_UNIT_USER</parameter>
: User unit, a value in the current coordinate system.
  If used in the root element for the initial coordinate systems it
  corresponds to pixels. (Since 1.16)
<parameter>CAIRO_SVG_UNIT_EM</parameter>
: The size of the element's font. (Since 1.16)
<parameter>CAIRO_SVG_UNIT_EX</parameter>
: The x-height of the element’s font. (Since 1.16)
<parameter>CAIRO_SVG_UNIT_PX</parameter>
: Pixels (1px = 1/96th of 1in). (Since 1.16)
<parameter>CAIRO_SVG_UNIT_IN</parameter>
: Inches (1in = 2.54cm = 96px). (Since 1.16)
<parameter>CAIRO_SVG_UNIT_CM</parameter>
: Centimeters (1cm = 96px/2.54). (Since 1.16)
<parameter>CAIRO_SVG_UNIT_MM</parameter>
: Millimeters (1mm = 1/10th of 1cm). (Since 1.16)
<parameter>CAIRO_SVG_UNIT_PT</parameter>
: Points (1pt = 1/72th of 1in). (Since 1.16)
<parameter>CAIRO_SVG_UNIT_PC</parameter>
: Picas (1pc = 1/6th of 1in). (Since 1.16)
<parameter>CAIRO_SVG_UNIT_PERCENT</parameter>
: Percent, a value that is some fraction of another
  reference value. (Since 1.16)</para>
<para><link linkend="cairo-svg-unit-t"><type>cairo_svg_unit_t</type></link> is used to describe the units valid for coordinates and
lengths in the SVG specification.</para>
<para>See also:
https://www.w3.org/TR/SVG/coords.html<link linkend="Units"><type>Units</type></link>
https://www.w3.org/TR/SVG/types.html<link linkend="DataTypeLength"><type>DataTypeLength</type></link>
https://www.w3.org/TR/css-values-3/<link linkend="lengths"><type>lengths</type></link></para>
<refsect3 id="cairo-svg-unit-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-SVG-UNIT-USER:CAPS">CAIRO_SVG_UNIT_USER</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-EM:CAPS">CAIRO_SVG_UNIT_EM</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-EX:CAPS">CAIRO_SVG_UNIT_EX</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-PX:CAPS">CAIRO_SVG_UNIT_PX</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-IN:CAPS">CAIRO_SVG_UNIT_IN</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-CM:CAPS">CAIRO_SVG_UNIT_CM</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-MM:CAPS">CAIRO_SVG_UNIT_MM</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-PT:CAPS">CAIRO_SVG_UNIT_PT</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-PC:CAPS">CAIRO_SVG_UNIT_PC</para></entry>
<entry /><entry />
</row>
<row role="constant"><entry role="enum_member_name"><para id="CAIRO-SVG-UNIT-PERCENT:CAPS">CAIRO_SVG_UNIT_PERCENT</para></entry>
<entry /><entry />
</row>
</tbody></tgroup></informaltable>
</refsect3><para role="since">Since: <link linkend="api-index-1.16">1.16</link></para></refsect2>

</refsect1>
<refsect1 id="cairo-SVG-Surfaces.see-also">
<title>See Also</title>
<para><link linkend="cairo-surface-t"><type>cairo_surface_t</type></link></para>

</refsect1>

</refentry>