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127 lines
5.8 KiB
XML
127 lines
5.8 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
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"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
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<refentry id="glXCreateGLXPixmap">
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<refmeta>
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<refmetainfo>
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<copyright>
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<year>1991-2006</year>
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<holder>Silicon Graphics, Inc.</holder>
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</copyright>
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</refmetainfo>
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<refentrytitle>glXCreateGLXPixmap</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glXCreateGLXPixmap</refname>
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<refpurpose>create an off-screen GLX rendering area</refpurpose>
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</refnamediv>
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<refsynopsisdiv><title>C Specification</title>
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<funcsynopsis>
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<funcprototype>
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<funcdef>GLXPixmap <function>glXCreateGLXPixmap</function></funcdef>
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<paramdef>Display * <parameter>dpy</parameter></paramdef>
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<paramdef>XVisualInfo * <parameter>vis</parameter></paramdef>
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<paramdef>Pixmap <parameter>pixmap</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<!-- eqn: ignoring delim $$ -->
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<refsect1 id="parameters"><title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><parameter>dpy</parameter></term>
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<listitem>
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<para>
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Specifies the connection to the X server.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>vis</parameter></term>
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<listitem>
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<para>
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Specifies the visual that defines the structure of the rendering area.
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It is a pointer to an <constant>XVisualInfo</constant> structure,
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not a visual ID or a pointer to a <constant>Visual</constant>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>pixmap</parameter></term>
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<listitem>
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<para>
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Specifies the X pixmap that will be used as the front left color buffer
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of the off-screen rendering area.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 id="description"><title>Description</title>
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<para>
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<function>glXCreateGLXPixmap</function> creates an off-screen rendering area and returns its XID.
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Any GLX rendering context that was created with respect to <parameter>vis</parameter>
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can be used to render into this off-screen area.
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Use <citerefentry><refentrytitle>glXMakeCurrent</refentrytitle></citerefentry> to associate the rendering area with a GLX
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rendering context.
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</para>
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<para>
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The X pixmap identified by <parameter>pixmap</parameter> is used as the front left buffer of the
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resulting off-screen rendering area.
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All other buffers specified by <parameter>vis</parameter>,
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including color buffers other than the front left buffer,
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are created without externally visible names.
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GLX pixmaps with double-buffering are supported.
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However, <citerefentry><refentrytitle>glXSwapBuffers</refentrytitle></citerefentry> is ignored by these pixmaps.
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</para>
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<para>
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Some implementations may not support GLX pixmaps with direct rendering
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contexts.
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</para>
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</refsect1>
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<refsect1 id="notes"><title>Notes</title>
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<para>
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<constant>XVisualInfo</constant> is defined in <emphasis>Xutil.h.</emphasis>
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It is a structure that includes <emphasis>visual</emphasis>, <emphasis>visualID</emphasis>, <emphasis>screen</emphasis>, and
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<emphasis>depth</emphasis> elements.
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</para>
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</refsect1>
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<refsect1 id="errors"><title>Errors</title>
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<para>
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<constant>BadMatch</constant> is generated if the depth of <parameter>pixmap</parameter> does not match
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the depth value reported by core X11 for <parameter>vis</parameter>,
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or if <parameter>pixmap</parameter> was not created with respect to the same screen as <parameter>vis</parameter>.
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</para>
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<para>
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<constant>BadValue</constant> is generated
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if <parameter>vis</parameter> is not a valid XVisualInfo pointer (for example, if a
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particular GLX implementation does not support this visual).
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</para>
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<para>
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<constant>BadPixmap</constant> is generated if <parameter>pixmap</parameter> is not a valid pixmap.
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</para>
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<para>
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<constant>BadAlloc</constant> is generated if the server cannot allocate the GLX
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pixmap.
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</para>
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</refsect1>
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<refsect1 id="seealso"><title>See Also</title>
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<para>
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<citerefentry><refentrytitle>glXCreateContext</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXCreatePixmap</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXDestroyGLXPixmap</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXIsDirect</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXMakeCurrent</refentrytitle></citerefentry>
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</para>
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</refsect1>
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<refsect1 id="Copyright"><title>Copyright</title>
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<para>
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Copyright <trademark class="copyright"></trademark> 1991-2006
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Silicon Graphics, Inc. This document is licensed under the SGI
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Free Software B License. For details, see
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<ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
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</para>
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</refsect1>
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</refentry>
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