glyphs.xml

Pango is a library for layout and rendering of text, with an emphasis on internationalization. Pang

<term><link linkend="double">double</link>&nbsp;<structfield>yy</structfield>;</term>
<listitem><simpara> 4th component of the transformation matrix
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="double">double</link>&nbsp;<structfield>x0</structfield>;</term>
<listitem><simpara> x translation
</simpara></listitem>
</varlistentry>
<varlistentry>
<term><link linkend="double">double</link>&nbsp;<structfield>y0</structfield>;</term>
<listitem><simpara> y translation
</simpara></listitem>
</varlistentry>
</variablelist><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="PANGO-TYPE-MATRIX:CAPS" role="macro">
<title>PANGO_TYPE_MATRIX</title>
<indexterm zone="PANGO-TYPE-MATRIX:CAPS"><primary>PANGO_TYPE_MATRIX</primary></indexterm><programlisting>#define PANGO_TYPE_MATRIX (pango_matrix_get_type ())
</programlisting>
<para>
The GObject type for <link linkend="PangoMatrix"><type>PangoMatrix</type></link></para>
<para>

</para></refsect2>
<refsect2 id="PANGO-MATRIX-INIT:CAPS" role="macro" condition="since:1.6">
<title>PANGO_MATRIX_INIT</title>
<indexterm zone="PANGO-MATRIX-INIT:CAPS" role="1.6"><primary>PANGO_MATRIX_INIT</primary></indexterm><programlisting>#define PANGO_MATRIX_INIT { 1., 0., 0., 1., 0., 0. }
</programlisting>
<para>
Constant that can be used to initialize a PangoMatrix to
the identity transform.
</para>
<para>
<informalexample><programlisting>
PangoMatrix matrix = PANGO_MATRIX_INIT;
pango_matrix_rotate (&amp;matrix, 45.);
</programlisting></informalexample></para>
<para>

</para><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="pango-matrix-copy" role="function" condition="since:1.6">
<title>pango_matrix_copy ()</title>
<indexterm zone="pango-matrix-copy" role="1.6"><primary>pango_matrix_copy</primary></indexterm><programlisting><link linkend="PangoMatrix">PangoMatrix</link>*        pango_matrix_copy                   (const <link linkend="PangoMatrix">PangoMatrix</link> *matrix);</programlisting>
<para>
Copies a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>, may be <link linkend="NULL:CAPS"><literal>NULL</literal></link>
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> the newly allocated <link linkend="PangoMatrix"><type>PangoMatrix</type></link>, which should
              be freed with <link linkend="pango-matrix-free"><function>pango_matrix_free()</function></link>, or <link linkend="NULL:CAPS"><literal>NULL</literal></link> if
              <parameter>matrix</parameter> was <link linkend="NULL:CAPS"><literal>NULL</literal></link>.

</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="pango-matrix-free" role="function" condition="since:1.6">
<title>pango_matrix_free ()</title>
<indexterm zone="pango-matrix-free" role="1.6"><primary>pango_matrix_free</primary></indexterm><programlisting><link linkend="void">void</link>                pango_matrix_free                   (<link linkend="PangoMatrix">PangoMatrix</link> *matrix);</programlisting>
<para>
Free a <link linkend="PangoMatrix"><type>PangoMatrix</type></link> created with <link linkend="pango-matrix-copy"><function>pango_matrix_copy()</function></link>.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>, may be <link linkend="NULL:CAPS"><literal>NULL</literal></link>
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="pango-matrix-translate" role="function" condition="since:1.6">
<title>pango_matrix_translate ()</title>
<indexterm zone="pango-matrix-translate" role="1.6"><primary>pango_matrix_translate</primary></indexterm><programlisting><link linkend="void">void</link>                pango_matrix_translate              (<link linkend="PangoMatrix">PangoMatrix</link> *matrix,
                                                         <link linkend="double">double</link> tx,
                                                         <link linkend="double">double</link> ty);</programlisting>
<para>
Changes the transformation represented by <parameter>matrix</parameter> to be the
transformation given by first translating by (<parameter>tx</parameter>, <parameter>ty</parameter>)
then applying the original transformation.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>tx</parameter>&nbsp;:</term>
<listitem><simpara> amount to translate in the X direction
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>ty</parameter>&nbsp;:</term>
<listitem><simpara> amount to translate in the Y direction
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="pango-matrix-scale" role="function" condition="since:1.6">
<title>pango_matrix_scale ()</title>
<indexterm zone="pango-matrix-scale" role="1.6"><primary>pango_matrix_scale</primary></indexterm><programlisting><link linkend="void">void</link>                pango_matrix_scale                  (<link linkend="PangoMatrix">PangoMatrix</link> *matrix,
                                                         <link linkend="double">double</link> scale_x,
                                                         <link linkend="double">double</link> scale_y);</programlisting>
<para>
Changes the transformation represented by <parameter>matrix</parameter> to be the
transformation given by first scaling by <parameter>sx</parameter> in the X direction
and <parameter>sy</parameter> in the Y direction then applying the original
transformation.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>scale_x</parameter>&nbsp;:</term>
<listitem><simpara> amount to scale by in X direction
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>scale_y</parameter>&nbsp;:</term>
<listitem><simpara> amount to scale by in Y direction
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="pango-matrix-rotate" role="function" condition="since:1.6">
<title>pango_matrix_rotate ()</title>
<indexterm zone="pango-matrix-rotate" role="1.6"><primary>pango_matrix_rotate</primary></indexterm><programlisting><link linkend="void">void</link>                pango_matrix_rotate                 (<link linkend="PangoMatrix">PangoMatrix</link> *matrix,
                                                         <link linkend="double">double</link> degrees);</programlisting>
<para>
Changes the transformation represented by <parameter>matrix</parameter> to be the
transformation given by first rotating by <parameter>degrees</parameter> degrees
counter-clockwise then applying the original transformation.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>degrees</parameter>&nbsp;:</term>
<listitem><simpara> degrees to rotate counter-clockwise
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="pango-matrix-concat" role="function" condition="since:1.6">
<title>pango_matrix_concat ()</title>
<indexterm zone="pango-matrix-concat" role="1.6"><primary>pango_matrix_concat</primary></indexterm><programlisting><link linkend="void">void</link>                pango_matrix_concat                 (<link linkend="PangoMatrix">PangoMatrix</link> *matrix,
                                                         const <link linkend="PangoMatrix">PangoMatrix</link> *new_matrix);</programlisting>
<para>
Changes the transformation represented by <parameter>matrix</parameter> to be the
transformation given by first applying transformation
given by <parameter>new_matrix</parameter> then applying the original transformation.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>new_matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.6
</para></refsect2>
<refsect2 id="pango-matrix-transform-point" role="function" condition="since:1.16">
<title>pango_matrix_transform_point ()</title>
<indexterm zone="pango-matrix-transform-point" role="1.16"><primary>pango_matrix_transform_point</primary></indexterm><programlisting><link linkend="void">void</link>                pango_matrix_transform_point        (const <link linkend="PangoMatrix">PangoMatrix</link> *matrix,
                                                         <link linkend="double">double</link> *x,
                                                         <link linkend="double">double</link> *y);</programlisting>
<para>
Transforms the point (<parameter>x</parameter>, <parameter>y</parameter>) by <parameter>matrix</parameter>.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>, or <link linkend="NULL:CAPS"><literal>NULL</literal></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>x</parameter>&nbsp;:</term>
<listitem><simpara> in/out X position
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>y</parameter>&nbsp;:</term>
<listitem><simpara> in/out Y position
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.16
</para></refsect2>
<refsect2 id="pango-matrix-transform-distance" role="function" condition="since:1.16">
<title>pango_matrix_transform_distance ()</title>
<indexterm zone="pango-matrix-transform-distance" role="1.16"><primary>pango_matrix_transform_distance</primary></indexterm><programlisting><link linkend="void">void</link>                pango_matrix_transform_distance     (const <link linkend="PangoMatrix">PangoMatrix</link> *matrix,
                                                         <link linkend="double">double</link> *dx,
                                                         <link linkend="double">double</link> *dy);</programlisting>
<para>
Transforms the distance vector (<parameter>dx</parameter>,<parameter>dy</parameter>) by <parameter>matrix</parameter>. This is
similar to <link linkend="pango-matrix-transform-point"><function>pango_matrix_transform_point()</function></link> except that the translation
components of the transformation are ignored. The calculation of
the returned vector is as follows:
</para>
<para>
<programlisting>
dx2 = dx1 * xx + dy1 * xy;
dy2 = dx1 * yx + dy1 * yy;
</programlisting>
</para>
<para>
Affine transformations are position invariant, so the same vector
always transforms to the same vector. If (<parameter>x1</parameter>,<parameter>y1</parameter>) transforms
to (<parameter>x2</parameter>,<parameter>y2</parameter>) then (<parameter>x1</parameter>+<parameter>dx1</parameter>,<parameter>y1</parameter>+<parameter>dy1</parameter>) will transform to
(<parameter>x1</parameter>+<parameter>dx2</parameter>,<parameter>y1</parameter>+<parameter>dy2</parameter>) for all values of <parameter>x1</parameter> and <parameter>x2</parameter>.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>matrix</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoMatrix"><type>PangoMatrix</type></link>, or <link linkend="NULL:CAPS"><literal>NULL</literal></link>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>dx</parameter>&nbsp;:</term>
<listitem><simpara> in/out X component of a distance vector
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>dy</parameter>&nbsp;:</term>
<listitem><simpara> yn/out Y component of a distance vector
</simpara></listitem></varlistentry>
</variablelist><para role="since">Since  1.16
</para></refsect2>