mirror of
https://github.com/Ryujinx/Opentk.git
synced 2024-12-26 16:35:27 +00:00
201 lines
9.5 KiB
XML
201 lines
9.5 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
|
|
"http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
|
|
<refentry id="glXMakeContextCurrent">
|
|
<refmeta>
|
|
<refmetainfo>
|
|
<copyright>
|
|
<year>1991-2006</year>
|
|
<holder>Silicon Graphics, Inc.</holder>
|
|
</copyright>
|
|
</refmetainfo>
|
|
<refentrytitle>glXMakeContextCurrent</refentrytitle>
|
|
<manvolnum>3G</manvolnum>
|
|
</refmeta>
|
|
<refnamediv>
|
|
<refname>glXMakeContextCurrent</refname>
|
|
<refpurpose>attach a GLX context to a GLX drawable</refpurpose>
|
|
</refnamediv>
|
|
<refsynopsisdiv><title>C Specification</title>
|
|
<funcsynopsis>
|
|
<funcprototype>
|
|
<funcdef>Bool <function>glXMakeContextCurrent</function></funcdef>
|
|
<paramdef>Display * <parameter>display</parameter></paramdef>
|
|
<paramdef>GLXDrawable <parameter>draw</parameter></paramdef>
|
|
<paramdef>GLXDrawable <parameter>read</parameter></paramdef>
|
|
<paramdef>GLXContext <parameter>ctx</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
<!-- eqn: ignoring delim $$ -->
|
|
<refsect1 id="parameters"><title>Parameters</title>
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><parameter>display</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the connection to the X server.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>draw</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies a GLX drawable to render into.
|
|
Must be an XID representing a GLXWindow, GLXPixmap, or GLXPbuffer.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>read</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies a GLX drawable to read from.
|
|
Must be an XID representing a GLXWindow, GLXPixmap, or GLXPbuffer.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><parameter>ctx</parameter></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies the GLX context to be bound to <parameter>read</parameter> and <parameter>ctx</parameter>.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
<refsect1 id="description"><title>Description</title>
|
|
<para>
|
|
<function>glXMakeContextCurrent</function> binds <parameter>ctx</parameter> to the current rendering thread and to the <parameter>draw</parameter>
|
|
and <parameter>read</parameter> GLX drawables. <parameter>draw</parameter> and <parameter>read</parameter> may be the same.
|
|
</para>
|
|
<para>
|
|
<parameter>draw</parameter> is used for all OpenGL operations except:
|
|
</para>
|
|
<para>
|
|
Any pixel data that are read based on the value of <constant>GLX_READ_BUFFER</constant>.
|
|
Note that accumulation operations use the value of <constant>GLX_READ_BUFFER</constant>,
|
|
but are not allowed unless <parameter>draw</parameter> is identical to <parameter>read</parameter>.
|
|
</para>
|
|
<para>
|
|
Any depth values that are retrieved by <citerefentry><refentrytitle>glReadPixels</refentrytitle></citerefentry> or <citerefentry><refentrytitle>glCopyPixels</refentrytitle></citerefentry>.
|
|
</para>
|
|
<para>
|
|
Any stencil values that are retrieved by <citerefentry><refentrytitle>glReadPixels</refentrytitle></citerefentry> or
|
|
<citerefentry><refentrytitle>glCopyPixels</refentrytitle></citerefentry>.
|
|
</para>
|
|
<para>
|
|
Frame buffer values are taken from <parameter>draw</parameter>.
|
|
</para>
|
|
<para>
|
|
If the current rendering thread has a current rendering context, that
|
|
context is flushed and replaced by <parameter>ctx</parameter>.
|
|
</para>
|
|
<para>
|
|
The first time that <parameter>ctx</parameter> is made current, the viewport and scissor
|
|
dimensions are set to the size of the <parameter>draw</parameter> drawable. The viewport
|
|
and scissor are not modified when <parameter>ctx</parameter> is subsequently made current.
|
|
</para>
|
|
<para>
|
|
To release the current context without assigning a new one,
|
|
call <function>glXMakeContextCurrent</function> with <parameter>draw</parameter> and <parameter>read</parameter> set to <constant>None</constant> and <parameter>ctx</parameter>
|
|
set to <constant>NULL</constant>.
|
|
</para>
|
|
<para>
|
|
<function>glXMakeContextCurrent</function> returns <constant>True</constant> if it is successful,
|
|
<constant>False</constant> otherwise.
|
|
If <constant>False</constant> is returned, the previously current rendering context
|
|
and drawable (if any) remain unchanged.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="notes"><title>Notes</title>
|
|
<para>
|
|
<function>glXMakeContextCurrent</function> is available only if the GLX version is 1.3 or greater.
|
|
</para>
|
|
<para>
|
|
If the GLX version is 1.1 or 1.0, the GL version must be 1.0.
|
|
If the GLX version is 1.2, then the GL version must be 1.1.
|
|
If the GLX version is 1.3, then the GL version must be 1.2.
|
|
</para>
|
|
<para>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="errors"><title>Errors</title>
|
|
<para>
|
|
<constant>BadMatch</constant> is generated if <parameter>draw</parameter> and <parameter>read</parameter> are not compatible.
|
|
</para>
|
|
<para>
|
|
<constant>BadAccess</constant> is generated if <parameter>ctx</parameter> is current to some other
|
|
thread.
|
|
</para>
|
|
<para>
|
|
<constant>GLXContextState</constant> is generated if there is a current rendering
|
|
context and its render mode is either <constant>GLX_FEEDBACK</constant> or
|
|
<constant>GLX_SELECT</constant>.
|
|
</para>
|
|
<para>
|
|
<constant>GLXBadContext</constant> is generated if <parameter>ctx</parameter> is not a valid GLX
|
|
rendering context.
|
|
</para>
|
|
<para>
|
|
<constant>GLXBadDrawable</constant> is generated if <parameter>draw</parameter> or <parameter>read</parameter> is not a valid
|
|
GLX drawable.
|
|
</para>
|
|
<para>
|
|
<constant>GLXBadWindow</constant> is generated if the underlying X window for either
|
|
<parameter>draw</parameter> or <parameter>read</parameter> is no longer valid.
|
|
</para>
|
|
<para>
|
|
<constant>GLXBadCurrentDrawable</constant> is generated if the previous context of
|
|
the calling thread has unflushed commands and the previous drawable is
|
|
no longer valid.
|
|
</para>
|
|
<para>
|
|
<constant>BadAlloc</constant> is generated if the X server does not have enough
|
|
resources to allocate the buffers.
|
|
</para>
|
|
<para>
|
|
<constant>BadMatch</constant> is generated if:
|
|
</para>
|
|
<para>
|
|
<parameter>draw</parameter> and <parameter>read</parameter> cannot fit into frame buffer memory simultaneously.
|
|
</para>
|
|
<para>
|
|
<parameter>draw</parameter> or <parameter>read</parameter> is a GLXPixmap and <parameter>ctx</parameter> is a direct-rendering
|
|
context.
|
|
</para>
|
|
<para>
|
|
<parameter>draw</parameter> or <parameter>read</parameter> is a GLXPixmap and <parameter>ctx</parameter> was previously bound to a
|
|
GLXWindow or GLXPbuffer.
|
|
</para>
|
|
<para>
|
|
<parameter>draw</parameter> or <parameter>read</parameter> is a GLXWindow or GLXPbuffer and <parameter>ctx</parameter> was
|
|
previously bound to a GLXPixmap.
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="seealso"><title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>glXCreateNewContext</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXCreateWindow</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXCreatePixmap</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXCreatePbuffer</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXDestroyContext</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXGetCurrentContext</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXGetCurrentDisplay</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXGetCurrentDrawable</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXGetCurrentReadDrawable</refentrytitle></citerefentry>,
|
|
<citerefentry><refentrytitle>glXMakeCurrent</refentrytitle></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
<refsect1 id="Copyright"><title>Copyright</title>
|
|
<para>
|
|
Copyright <trademark class="copyright"></trademark> 1991-2006
|
|
Silicon Graphics, Inc. This document is licensed under the SGI
|
|
Free Software B License. For details, see
|
|
<ulink url="http://oss.sgi.com/projects/FreeB/">http://oss.sgi.com/projects/FreeB/</ulink>.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|