171 lines
6.9 KiB
XML
171 lines
6.9 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="glXQueryDrawable">
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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>glXQueryDrawable</refentrytitle>
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<manvolnum>3G</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>glXQueryDrawable</refname>
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<refpurpose>returns an attribute assoicated with a GLX drawable</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>int <function>glXQueryDrawable</function></funcdef>
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<paramdef>Display * <parameter>dpy</parameter></paramdef>
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<paramdef>GLXDrawable <parameter>draw</parameter></paramdef>
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<paramdef>int <parameter>attribute</parameter></paramdef>
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<paramdef>unsigned int * <parameter>value</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>draw</parameter></term>
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<listitem>
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<para>
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Specifies the GLX drawable to be queried.
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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>attribute</parameter></term>
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<listitem>
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<para>
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Specifies the attribute to be returned. Must be one of
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<constant>GLX_WIDTH</constant>,
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<constant>GLX_HEIGHT</constant>,
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<constant>GLX_PRESERVED_CONTENTS</constant>,
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<constant>GLX_LARGEST_PBUFFER</constant>, or
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<constant>GLX_FBCONFIG_ID</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>value</parameter></term>
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<listitem>
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<para>
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Contains the return value for
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<parameter>attribute</parameter>.
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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>glXQueryDrawable</function> sets
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<parameter>value</parameter> to the value of
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<parameter>attribute</parameter> with respect to the GLXDrawable
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<parameter>draw</parameter>.
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</para>
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<para>
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<parameter>attribute</parameter> may be one of the following:
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</para>
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<variablelist>
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<varlistentry>
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<term><constant>GLX_WIDTH</constant></term>
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<listitem>
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<para>
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Returns the width of <parameter>ctx</parameter>.
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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><constant>GLX_HEIGHT</constant></term>
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<listitem>
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<para>
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Returns the height of <parameter>ctx</parameter>.
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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><constant>GLX_PRESERVED_CONTENTS</constant></term>
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<listitem>
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<para>
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Returns <constant>True</constant> if the contents
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of a GLXPbuffer are preserved when a resource
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conflict occurs; <constant>False</constant> otherwise.
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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><constant>GLX_LARGEST_PBUFFER</constant></term>
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<listitem>
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<para>
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Returns the value set when
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<function>glXCreatePbuffer</function> was called to
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create the GLXPbuffer. If
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<constant>False</constant> is returned, then the
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call to <function>glXCreatePbuffer</function> will
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fail to create a GLXPbuffer if the requested size
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is larger than the implementation maximum or
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available resources. If <constant>True</constant>
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is returned, a GLXPbuffer of the maximum availble
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size (if less than the requested width and height)
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is created.
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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><constant>GLX_FBCONFIG_ID</constant></term>
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<listitem>
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<para>
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Returns the XID for <parameter>draw</parameter>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>
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If <parameter>draw</parameter> is a GLXWindow or GLXPixmap and
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<parameter>attribute</parameter> is set to
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<constant>GLX_PRESERVED_CONTENTS</constant> or
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<constant>GLX_LARGETST_PBUFFER</constant>, the contents of
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<parameter>value</parameter> are undefined. If
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<parameter>attribute</parameter> is not one of the attributes
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listed above, the contents of <parameter>value</parameter> are
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unedfined.
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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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A <constant>GLXBadDrawable</constant> is generated if
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<parameter>draw</parameter> is not a valid GLXDrawable.
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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>glXCreateWindow</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXCreatePixmap</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXCreatePbuffer</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXGetFBConfigAttrib</refentrytitle></citerefentry>,
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<citerefentry><refentrytitle>glXChooseFBConfig</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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