Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731

7 files changed, 4920 insertions, 0 deletions

diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
new file mode 100644
index 000000000..fd0d6815b
--- /dev/null
+++ b/src/opengl/qgl.cpp
@@ -0,0 +1,2367 @@
+/****************************************************************************
+**
+** Implementation of OpenGL classes for TQt
+**
+** Created : 970112
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the opengl module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file.  Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "qgl.h"
+#include "qpixmap.h"
+#include "qpaintdevicemetrics.h"
+#include "qimage.h"
+#include "qcleanuphandler.h"
+#include "qptrdict.h"
+
+static TQGLFormat* qgl_default_format = 0;
+static TQGLFormat* qgl_default_overlay_format = 0;
+
+#if defined(Q_WS_X11)
+#include "private/qt_x11_p.h"
+#define INT32 dummy_INT32
+#define INT8 dummy_INT8
+#include <GL/glx.h>
+#undef INT32
+#undef INT8
+#include "qgl_x11_p.h"
+#endif
+
+static TQCleanupHandler<TQGLFormat> qgl_cleanup_format;
+
+
+/*!
+    \class TQGL qgl.h
+    \brief The TQGL class is a namespace for miscellaneous identifiers
+    in the TQt OpenGL module.
+\if defined(commercial)
+    It is part of the <a href="commercialeditions.html">TQt Enterprise Edition</a>.
+\endif
+
+    \module OpenGL
+    \ingroup graphics
+    \ingroup images
+
+
+    Normally you can ignore this class. TQGLWidget and the other
+    OpenGL<sup>*</sup> module classes inherit it, so when you make your
+    own TQGLWidget subclass you can use the identifiers in the TQGL
+    namespace without qualification.
+
+    However, you may occasionally find yourself in situations where you
+    need to refer to these identifiers from outside the TQGL namespace's
+    scope, e.g. in static functions. In such cases, simply write e.g. \c
+    TQGL::DoubleBuffer instead of just \c DoubleBuffer.
+
+    <sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the
+    United States and other countries.
+
+*/
+
+
+/*****************************************************************************
+  TQGLFormat implementation
+ *****************************************************************************/
+
+
+/*!
+    \class TQGLFormat qgl.h
+    \brief The TQGLFormat class specifies the display format of an OpenGL
+    rendering context.
+\if defined(commercial)
+    It is part of the <a href="commercialeditions.html">TQt Enterprise Edition</a>.
+\endif
+
+    \ingroup graphics
+    \ingroup images
+    \module OpenGL
+
+    A display format has several characteristics:
+    \list
+    \i \link setDoubleBuffer() Double or single buffering.\endlink
+    \i \link setDepth() Depth buffer.\endlink
+    \i \link setRgba() RGBA or color index mode.\endlink
+    \i \link setAlpha() Alpha channel.\endlink
+    \i \link setAccum() Accumulation buffer.\endlink
+    \i \link setStencil() Stencil buffer.\endlink
+    \i \link setStereo() Stereo buffers.\endlink
+    \i \link setDirectRendering() Direct rendering.\endlink
+    \i \link setOverlay() Presence of an overlay.\endlink
+    \i \link setPlane() The plane of an overlay format.\endlink
+    \endlist
+
+    You create and tell a TQGLFormat object what rendering options you
+    want from an OpenGL<sup>*</sup> rendering context.
+
+    OpenGL drivers or accelerated hardware may or may not support
+    advanced features such as alpha channel or stereographic viewing.
+    If you request some features that the driver/hardware does not
+    provide when you create a TQGLWidget, you will get a rendering
+    context with the nearest subset of features.
+
+    There are different ways to define the display characteristics of
+    a rendering context. One is to create a TQGLFormat and make it the
+    default for the entire application:
+    \code
+    TQGLFormat f;
+    f.setAlpha( TRUE );
+    f.setStereo( TRUE );
+    TQGLFormat::setDefaultFormat( f );
+    \endcode
+
+    Or you can specify the desired format when creating an object of
+    your TQGLWidget subclass:
+    \code
+    TQGLFormat f;
+    f.setDoubleBuffer( FALSE );                 // single buffer
+    f.setDirectRendering( FALSE );              // software rendering
+    MyGLWidget* myWidget = new MyGLWidget( f, ... );
+    \endcode
+
+    After the widget has been created, you can find out which of the
+    requested features the system was able to provide:
+    \code
+    TQGLFormat f;
+    f.setOverlay( TRUE );
+    f.setStereo( TRUE );
+    MyGLWidget* myWidget = new MyGLWidget( f, ... );
+    if ( !w->format().stereo() ) {
+	// ok, goggles off
+	if ( !w->format().hasOverlay() ) {
+	    qFatal( "Cool hardware retquired" );
+	}
+    }
+    \endcode
+
+    <sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the
+    United States and other countries.
+
+    \sa TQGLContext, TQGLWidget
+*/
+
+
+/*!
+    Constructs a TQGLFormat object with the factory default settings:
+    \list
+    \i \link setDoubleBuffer() Double buffer:\endlink Enabled.
+    \i \link setDepth() Depth buffer:\endlink Enabled.
+    \i \link setRgba() RGBA:\endlink Enabled (i.e., color index disabled).
+    \i \link setAlpha() Alpha channel:\endlink Disabled.
+    \i \link setAccum() Accumulator buffer:\endlink Disabled.
+    \i \link setStencil() Stencil buffer:\endlink Disabled.
+    \i \link setStereo() Stereo:\endlink Disabled.
+    \i \link setDirectRendering() Direct rendering:\endlink Enabled.
+    \i \link setOverlay() Overlay:\endlink Disabled.
+    \i \link setPlane() Plane:\endlink 0 (i.e., normal plane).
+    \endlist
+*/
+
+TQGLFormat::TQGLFormat()
+{
+    opts = DoubleBuffer | DepthBuffer | Rgba | DirectRendering;
+    pln = 0;
+}
+
+
+/*!
+    Creates a TQGLFormat object that is a copy of the current \link
+    defaultFormat() application default format\endlink.
+
+    If \a options is not 0, this copy is modified by these format
+    options. The \a options parameter should be \c FormatOption values
+    OR'ed together.
+
+    This constructor makes it easy to specify a certain desired format
+    in classes derived from TQGLWidget, for example:
+    \code
+    // The rendering in MyGLWidget depends on using
+    // stencil buffer and alpha channel
+    MyGLWidget::MyGLWidget( TQWidget* parent, const char* name )
+	: TQGLWidget( TQGLFormat( StencilBuffer | AlphaChannel ), parent, name )
+    {
+	if ( !format().stencil() )
+	    qWarning( "Could not get stencil buffer; results will be suboptimal" );
+	if ( !format().alphaChannel() )
+	    qWarning( "Could not get alpha channel; results will be suboptimal" );
+	...
+    }
+    \endcode
+
+    Note that there are \c FormatOption values to turn format settings
+    both on and off, e.g. \c DepthBuffer and \c NoDepthBuffer,
+    \c DirectRendering and \c IndirectRendering, etc.
+
+    The \a plane parameter defaults to 0 and is the plane which this
+    format should be associated with. Not all OpenGL implmentations
+    supports overlay/underlay rendering planes.
+
+    \sa defaultFormat(), setOption()
+*/
+
+TQGLFormat::TQGLFormat( int options, int plane )
+{
+    uint newOpts = options;
+    opts = defaultFormat().opts;
+    opts |= ( newOpts & 0xffff );
+    opts &= ~( newOpts >> 16 );
+    pln = plane;
+}
+
+
+/*!
+    \fn bool TQGLFormat::doubleBuffer() const
+
+    Returns TRUE if double buffering is enabled; otherwise returns
+    FALSE. Double buffering is enabled by default.
+
+    \sa setDoubleBuffer()
+*/
+
+/*!
+    If \a enable is TRUE sets double buffering; otherwise sets single
+    buffering.
+
+    Double buffering is enabled by default.
+
+    Double buffering is a technique where graphics are rendered on an
+    off-screen buffer and not directly to the screen. When the drawing
+    has been completed, the program calls a swapBuffers() function to
+    exchange the screen contents with the buffer. The result is
+    flicker-free drawing and often better performance.
+
+    \sa doubleBuffer(), TQGLContext::swapBuffers(),
+    TQGLWidget::swapBuffers()
+*/
+
+void TQGLFormat::setDoubleBuffer( bool enable )
+{
+    setOption( enable ? DoubleBuffer : SingleBuffer );
+}
+
+
+/*!
+    \fn bool TQGLFormat::depth() const
+
+    Returns TRUE if the depth buffer is enabled; otherwise returns
+    FALSE. The depth buffer is enabled by default.
+
+    \sa setDepth()
+*/
+
+/*!
+    If \a enable is TRUE enables the depth buffer; otherwise disables
+    the depth buffer.
+
+    The depth buffer is enabled by default.
+
+    The purpose of a depth buffer (or Z-buffering) is to remove hidden
+    surfaces. Pixels are assigned Z values based on the distance to
+    the viewer. A pixel with a high Z value is closer to the viewer
+    than a pixel with a low Z value. This information is used to
+    decide whether to draw a pixel or not.
+
+    \sa depth()
+*/
+
+void TQGLFormat::setDepth( bool enable )
+{
+    setOption( enable ? DepthBuffer : NoDepthBuffer );
+}
+
+
+/*!
+    \fn bool TQGLFormat::rgba() const
+
+    Returns TRUE if RGBA color mode is set. Returns FALSE if color
+    index mode is set. The default color mode is RGBA.
+
+    \sa setRgba()
+*/
+
+/*!
+    If \a enable is TRUE sets RGBA mode. If \a enable is FALSE sets
+    color index mode.
+
+    The default color mode is RGBA.
+
+    RGBA is the preferred mode for most OpenGL applications. In RGBA
+    color mode you specify colors as red + green + blue + alpha
+    quadruplets.
+
+    In color index mode you specify an index into a color lookup
+    table.
+
+    \sa rgba()
+*/
+
+void TQGLFormat::setRgba( bool enable )
+{
+    setOption( enable ? Rgba : ColorIndex );
+}
+
+
+/*!
+    \fn bool TQGLFormat::alpha() const
+
+    Returns TRUE if the alpha channel of the framebuffer is enabled;
+    otherwise returns FALSE. The alpha channel is disabled by default.
+
+    \sa setAlpha()
+*/
+
+/*!
+    If \a enable is TRUE enables the alpha channel; otherwise disables
+    the alpha channel.
+
+    The alpha buffer is disabled by default.
+
+    The alpha channel is typically used for implementing transparency
+    or translucency. The A in RGBA specifies the transparency of a
+    pixel.
+
+    \sa alpha()
+*/
+
+void TQGLFormat::setAlpha( bool enable )
+{
+    setOption( enable ? AlphaChannel : NoAlphaChannel );
+}
+
+
+/*!
+    \fn bool TQGLFormat::accum() const
+
+    Returns TRUE if the accumulation buffer is enabled; otherwise
+    returns FALSE. The accumulation buffer is disabled by default.
+
+    \sa setAccum()
+*/
+
+/*!
+    If \a enable is TRUE enables the accumulation buffer; otherwise
+    disables the accumulation buffer.
+
+    The accumulation buffer is disabled by default.
+
+    The accumulation buffer is used to create blur effects and
+    multiple exposures.
+
+    \sa accum()
+*/
+
+void TQGLFormat::setAccum( bool enable )
+{
+    setOption( enable ? AccumBuffer : NoAccumBuffer );
+}
+
+
+/*!
+    \fn bool TQGLFormat::stencil() const
+
+    Returns TRUE if the stencil buffer is enabled; otherwise returns
+    FALSE. The stencil buffer is disabled by default.
+
+    \sa setStencil()
+*/
+
+/*!
+    If \a enable is TRUE enables the stencil buffer; otherwise
+    disables the stencil buffer.
+
+    The stencil buffer is disabled by default.
+
+    The stencil buffer masks certain parts of the drawing area so that
+    masked parts are not drawn on.
+
+    \sa stencil()
+*/
+
+void TQGLFormat::setStencil( bool enable )
+{
+    setOption( enable ? StencilBuffer: NoStencilBuffer );
+}
+
+
+/*!
+    \fn bool TQGLFormat::stereo() const
+
+    Returns TRUE if stereo buffering is enabled; otherwise returns
+    FALSE. Stereo buffering is disabled by default.
+
+    \sa setStereo()
+*/
+
+/*!
+    If \a enable is TRUE enables stereo buffering; otherwise disables
+    stereo buffering.
+
+    Stereo buffering is disabled by default.
+
+    Stereo buffering provides extra color buffers to generate left-eye
+    and right-eye images.
+
+    \sa stereo()
+*/
+
+void TQGLFormat::setStereo( bool enable )
+{
+    setOption( enable ? StereoBuffers : NoStereoBuffers );
+}
+
+
+/*!
+    \fn bool TQGLFormat::directRendering() const
+
+    Returns TRUE if direct rendering is enabled; otherwise returns
+    FALSE.
+
+    Direct rendering is enabled by default.
+
+    \sa setDirectRendering()
+*/
+
+/*!
+    If \a enable is TRUE enables direct rendering; otherwise disables
+    direct rendering.
+
+    Direct rendering is enabled by default.
+
+    Enabling this option will make OpenGL bypass the underlying window
+    system and render directly from hardware to the screen, if this is
+    supported by the system.
+
+    \sa directRendering()
+*/
+
+void TQGLFormat::setDirectRendering( bool enable )
+{
+    setOption( enable ? DirectRendering : IndirectRendering );
+}
+
+
+/*!
+    \fn bool TQGLFormat::hasOverlay() const
+
+    Returns TRUE if overlay plane is enabled; otherwise returns FALSE.
+
+    Overlay is disabled by default.
+
+    \sa setOverlay()
+*/
+
+/*!
+    If \a enable is TRUE enables an overlay plane; otherwise disables
+    the overlay plane.
+
+    Enabling the overlay plane will cause TQGLWidget to create an
+    additional context in an overlay plane. See the TQGLWidget
+    documentation for further information.
+
+    \sa hasOverlay()
+*/
+
+void TQGLFormat::setOverlay( bool enable )
+{
+    setOption( enable ? HasOverlay : NoOverlay );
+}
+
+/*!
+    Returns the plane of this format. The default for normal formats
+    is 0, which means the normal plane. The default for overlay
+    formats is 1, which is the first overlay plane.
+
+    \sa setPlane()
+*/
+int TQGLFormat::plane() const
+{
+    return pln;
+}
+
+/*!
+    Sets the requested plane to \a plane. 0 is the normal plane, 1 is
+    the first overlay plane, 2 is the second overlay plane, etc.; -1,
+    -2, etc. are underlay planes.
+
+    Note that in contrast to other format specifications, the plane
+    specifications will be matched exactly. This means that if you
+    specify a plane that the underlying OpenGL system cannot provide,
+    an \link TQGLWidget::isValid() invalid\endlink TQGLWidget will be
+    created.
+
+    \sa plane()
+*/
+void TQGLFormat::setPlane( int plane )
+{
+    pln = plane;
+}
+
+/*!
+    Sets the format option to \a opt.
+
+    \sa testOption()
+*/
+
+void TQGLFormat::setOption( FormatOption opt )
+{
+    if ( opt & 0xffff )
+	opts |= opt;
+    else
+       opts &= ~( opt >> 16 );
+}
+
+
+
+/*!
+    Returns TRUE if format option \a opt is set; otherwise returns FALSE.
+
+    \sa setOption()
+*/
+
+bool TQGLFormat::testOption( FormatOption opt ) const
+{
+    if ( opt & 0xffff )
+       return ( opts & opt ) != 0;
+    else
+       return ( opts & ( opt >> 16 ) ) == 0;
+}
+
+
+
+/*!
+    \fn bool TQGLFormat::hasOpenGL()
+
+    Returns TRUE if the window system has any OpenGL support;
+    otherwise returns FALSE.
+
+    \warning This function must not be called until the TQApplication
+    object has been created.
+*/
+
+
+
+/*!
+    \fn bool TQGLFormat::hasOpenGLOverlays()
+
+    Returns TRUE if the window system supports OpenGL overlays;
+    otherwise returns FALSE.
+
+    \warning This function must not be called until the TQApplication
+    object has been created.
+*/
+
+/*!
+    Returns the default TQGLFormat for the application. All TQGLWidgets
+    that are created use this format unless another format is
+    specified, e.g. when they are constructed.
+
+    If no special default format has been set using
+    setDefaultFormat(), the default format is the same as that created
+    with TQGLFormat().
+
+    \sa setDefaultFormat()
+*/
+
+TQGLFormat TQGLFormat::defaultFormat()
+{
+    if ( !qgl_default_format ) {
+	qgl_default_format = new TQGLFormat;
+	qgl_cleanup_format.add( &qgl_default_format );
+    }
+    return *qgl_default_format;
+}
+
+/*!
+    Sets a new default TQGLFormat for the application to \a f. For
+    example, to set single buffering as the default instead of double
+    buffering, your main() might contain code like this:
+    \code
+    TQApplication a(argc, argv);
+    TQGLFormat f;
+    f.setDoubleBuffer( FALSE );
+    TQGLFormat::setDefaultFormat( f );
+    \endcode
+
+    \sa defaultFormat()
+*/
+
+void TQGLFormat::setDefaultFormat( const TQGLFormat &f )
+{
+    if ( !qgl_default_format ) {
+	qgl_default_format = new TQGLFormat;
+	qgl_cleanup_format.add( &qgl_default_format );
+    }
+    *qgl_default_format = f;
+}
+
+
+/*!
+    Returns the default TQGLFormat for overlay contexts.
+
+    The factory default overlay format is:
+    \list
+    \i \link setDoubleBuffer() Double buffer:\endlink Disabled.
+    \i \link setDepth() Depth buffer:\endlink Disabled.
+    \i \link setRgba() RGBA:\endlink Disabled (i.e., color index enabled).
+    \i \link setAlpha() Alpha channel:\endlink Disabled.
+    \i \link setAccum() Accumulator buffer:\endlink Disabled.
+    \i \link setStencil() Stencil buffer:\endlink Disabled.
+    \i \link setStereo() Stereo:\endlink Disabled.
+    \i \link setDirectRendering() Direct rendering:\endlink Enabled.
+    \i \link setOverlay() Overlay:\endlink Disabled.
+    \i \link setPlane() Plane:\endlink 1 (i.e., first overlay plane).
+    \endlist
+
+    \sa setDefaultFormat()
+*/
+
+TQGLFormat TQGLFormat::defaultOverlayFormat()
+{
+    if ( !qgl_default_overlay_format ) {
+	qgl_default_overlay_format = new TQGLFormat;
+	qgl_default_overlay_format->opts = DirectRendering;
+	qgl_default_overlay_format->pln = 1;
+	qgl_cleanup_format.add( &qgl_default_overlay_format );
+    }
+    return *qgl_default_overlay_format;
+}
+
+/*!
+    Sets a new default TQGLFormat for overlay contexts to \a f. This
+    format is used whenever a TQGLWidget is created with a format that
+    hasOverlay() enabled.
+
+    For example, to get a double buffered overlay context (if
+    available), use code like this:
+
+    \code
+    TQGLFormat f = TQGLFormat::defaultOverlayFormat();
+    f.setDoubleBuffer( TRUE );
+    TQGLFormat::setDefaultOverlayFormat( f );
+    \endcode
+
+    As usual, you can find out after widget creation whether the
+    underlying OpenGL system was able to provide the requested
+    specification:
+
+    \code
+    // ...continued from above
+    MyGLWidget* myWidget = new MyGLWidget( TQGLFormat( TQGL::HasOverlay ), ... );
+    if ( myWidget->format().hasOverlay() ) {
+	// Yes, we got an overlay, let's check _its_ format:
+	TQGLContext* olContext = myWidget->overlayContext();
+	if ( olContext->format().doubleBuffer() )
+	    ; // yes, we got a double buffered overlay
+	else
+	    ; // no, only single buffered overlays are available
+    }
+    \endcode
+
+    \sa defaultOverlayFormat()
+*/
+
+void TQGLFormat::setDefaultOverlayFormat( const TQGLFormat &f )
+{
+    if ( !qgl_default_overlay_format ) {
+	qgl_default_overlay_format = new TQGLFormat;
+	qgl_cleanup_format.add( &qgl_default_overlay_format );
+    }
+    *qgl_default_overlay_format = f;
+    // Make sure the user doesn't request that the overlays themselves
+    // have overlays, since it is unlikely that the system supports
+    // infinitely many planes...
+    qgl_default_overlay_format->setOverlay( FALSE );
+}
+
+
+/*!
+    Returns TRUE if all the options of the two TQGLFormats are equal;
+    otherwise returns FALSE.
+*/
+
+bool operator==( const TQGLFormat& a, const TQGLFormat& b )
+{
+    return (a.opts == b.opts) && (a.pln == b.pln);
+}
+
+
+/*!
+    Returns FALSE if all the options of the two TQGLFormats are equal;
+    otherwise returns TRUE.
+*/
+
+bool operator!=( const TQGLFormat& a, const TQGLFormat& b )
+{
+    return !( a == b );
+}
+
+
+
+/*****************************************************************************
+  TQGLContext implementation
+ *****************************************************************************/
+
+TQGLContext* TQGLContext::currentCtx = 0;
+
+/*!
+    \class TQGLContext qgl.h
+    \brief The TQGLContext class encapsulates an OpenGL rendering context.
+\if defined(commercial)
+    It is part of the <a href="commercialeditions.html">TQt Enterprise Edition</a>.
+\endif
+
+    \ingroup graphics
+    \ingroup images
+    \module OpenGL
+
+    An OpenGL<sup>*</sup> rendering context is a complete set of
+    OpenGL state variables.
+
+    The context's \link TQGL::FormatOption format\endlink is set in the
+    constructor or later with setFormat(). The format options that are
+    actually set are returned by format(); the options you asked for
+    are returned by requestedFormat(). Note that after a TQGLContext
+    object has been constructed, the actual OpenGL context must be
+    created by explicitly calling the \link create() create()\endlink
+    function. The makeCurrent() function makes this context the
+    current rendering context. You can make \e no context current
+    using doneCurrent(). The reset() function will reset the context
+    and make it invalid.
+
+    You can examine properties of the context with, e.g. isValid(),
+    isSharing(), initialized(), windowCreated() and
+    overlayTransparentColor().
+
+    If you're using double buffering you can swap the screen contents
+    with the off-screen buffer using swapBuffers().
+
+    Please note that TQGLContext is not thread safe.
+
+    <sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the
+    United States and other countries.
+
+*/
+
+
+/*!
+    Constructs an OpenGL context for the paint device \a device, which
+    can be a widget or a pixmap. The \a format specifies several
+    display options for the context.
+
+    If the underlying OpenGL/Window system cannot satisfy all the
+    features requested in \a format, the nearest subset of features
+    will be used. After creation, the format() method will return the
+    actual format obtained.
+
+    Note that after a TQGLContext object has been constructed, \link
+    create() create()\endlink must be called explicitly to create
+    the actual OpenGL context. The context will be \link isValid()
+    invalid\endlink if it was not possible to obtain a GL context at
+    all.
+
+    \sa format(), isValid()
+*/
+
+TQGLContext::TQGLContext( const TQGLFormat &format, TQPaintDevice *device )
+    : glFormat(format), reqFormat(format)
+{
+    init( device );
+}
+
+/*!
+    \overload
+    \internal
+*/
+TQGLContext::TQGLContext( const TQGLFormat &format )
+    : glFormat( format ), reqFormat(format)
+{
+    init();
+}
+
+/*!
+    Destroys the OpenGL context and frees its resources.
+*/
+
+TQGLContext::~TQGLContext()
+{
+    reset();
+    if ( d )
+	delete d;
+}
+
+
+/*!
+    \fn TQGLFormat TQGLContext::format() const
+
+    Returns the frame buffer format that was obtained (this may be a
+    subset of what was requested).
+
+    \sa requestedFormat()
+*/
+
+/*!
+    \fn TQGLFormat TQGLContext::requestedFormat() const
+
+    Returns the frame buffer format that was originally requested in
+    the constructor or setFormat().
+
+    \sa format()
+*/
+
+/*!
+    Sets a \a format for this context. The context is \link reset()
+    reset\endlink.
+
+    Call create() to create a new GL context that tries to match the
+    new format.
+
+    \code
+    TQGLContext *cx;
+    //  ...
+    TQGLFormat f;
+    f.setStereo( TRUE );
+    cx->setFormat( f );
+    if ( !cx->create() )
+	exit(); // no OpenGL support, or cannot render on the specified paintdevice
+    if ( !cx->format().stereo() )
+	exit(); // could not create stereo context
+    \endcode
+
+    \sa format(), reset(), create()
+*/
+
+void TQGLContext::setFormat( const TQGLFormat &format )
+{
+    reset();
+    glFormat = reqFormat = format;
+}
+
+/*!
+    \internal
+*/
+void TQGLContext::setDevice( TQPaintDevice *pDev )
+{
+    if ( isValid() )
+	reset();
+    d->paintDevice = pDev;
+    if ( d->paintDevice && (d->paintDevice->devType() != TQInternal::Widget
+			&& d->paintDevice->devType() != TQInternal::Pixmap) ) {
+#if defined(QT_CHECK_RANGE)
+	qWarning( "TQGLContext: Unsupported paint device type" );
+#endif
+    }
+}
+
+void TQGLContext::init( TQPaintDevice *dev )
+{
+    d = new Private;
+    d->valid = FALSE;
+#if defined(Q_WS_X11)
+    qt_resolve_gl_symbols();
+    gpm = 0;
+#endif
+    setDevice( dev );
+#if defined(Q_WS_WIN)
+    dc = 0;
+    win = 0;
+    pixelFormatId = 0;
+    cmap = 0;
+#endif
+#if defined(Q_WS_MAC)
+    d->oldR = TQRect(1, 1, 1, 1);
+#endif
+    d->crWin = FALSE;
+    d->initDone = FALSE;
+    d->sharing = FALSE;
+}
+
+/*!
+    \fn bool TQGLContext::isValid() const
+
+    Returns TRUE if a GL rendering context has been successfully
+    created; otherwise returns FALSE.
+*/
+
+/*!
+    \fn void TQGLContext::setValid( bool valid )
+    \internal
+
+    Forces the GL rendering context to be valid.
+*/
+
+/*!
+    \fn bool TQGLContext::isSharing() const
+
+    Returns TRUE if display list sharing with another context was
+    requested in the create() call and the GL system was able to
+    fulfill this request; otherwise returns FALSE. Note that display
+    list sharing might not be supported between contexts with
+    different formats.
+*/
+
+/*!
+    \fn bool TQGLContext::deviceIsPixmap() const
+
+    Returns TRUE if the paint device of this context is a pixmap;
+    otherwise returns FALSE.
+*/
+
+/*!
+    \fn bool TQGLContext::windowCreated() const
+
+    Returns TRUE if a window has been created for this context;
+    otherwise returns FALSE.
+
+    \sa setWindowCreated()
+*/
+
+/*!
+    \fn void TQGLContext::setWindowCreated( bool on )
+
+    If \a on is TRUE the context has had a window created for it. If
+    \a on is FALSE no window has been created for the context.
+
+    \sa windowCreated()
+*/
+
+/*!
+    \fn uint TQGLContext::colorIndex( const TQColor& c ) const
+
+    \internal
+
+    Returns a colormap index for the color c, in ColorIndex mode. Used
+    by qglColor() and qglClearColor().
+*/
+
+
+/*!
+    \fn bool TQGLContext::initialized() const
+
+    Returns TRUE if this context has been initialized, i.e. if
+    TQGLWidget::initializeGL() has been performed on it; otherwise
+    returns FALSE.
+
+    \sa setInitialized()
+*/
+
+/*!
+    \fn void TQGLContext::setInitialized( bool on )
+
+    If \a on is TRUE the context has been initialized, i.e.
+    TQGLContext::setInitialized() has been called on it. If \a on is
+    FALSE the context has not been initialized.
+
+    \sa initialized()
+*/
+
+/*!
+    \fn const TQGLContext* TQGLContext::currentContext()
+
+    Returns the current context, i.e. the context to which any OpenGL
+    commands will currently be directed. Returns 0 if no context is
+    current.
+
+    \sa makeCurrent()
+*/
+
+/*!
+    \fn TQColor TQGLContext::overlayTransparentColor() const
+
+    If this context is a valid context in an overlay plane, returns
+    the plane's transparent color. Otherwise returns an \link
+    TQColor::isValid() invalid \endlink color.
+
+    The returned color's \link TQColor::pixel() pixel \endlink value is
+    the index of the transparent color in the colormap of the overlay
+    plane. (Naturally, the color's RGB values are meaningless.)
+
+    The returned TQColor object will generally work as expected only
+    when passed as the argument to TQGLWidget::qglColor() or
+    TQGLWidget::qglClearColor(). Under certain circumstances it can
+    also be used to draw transparent graphics with a TQPainter. See the
+    examples/opengl/overlay_x11 example for details.
+*/
+
+
+/*!
+    Creates the GL context. Returns TRUE if it was successful in
+    creating a valid GL rendering context on the paint device
+    specified in the constructor; otherwise returns FALSE (i.e. the
+    context is invalid).
+
+    After successful creation, format() returns the set of features of
+    the created GL rendering context.
+
+    If \a shareContext points to a valid TQGLContext, this method will
+    try to establish OpenGL display list sharing between this context
+    and the \a shareContext. Note that this may fail if the two
+    contexts have different formats. Use isSharing() to see if sharing
+    succeeded.
+
+    \warning Implementation note: initialization of C++ class
+    members usually takes place in the class constructor. TQGLContext
+    is an exception because it must be simple to customize. The
+    virtual functions chooseContext() (and chooseVisual() for X11) can
+    be reimplemented in a subclass to select a particular context. The
+    problem is that virtual functions are not properly called during
+    construction (even though this is correct C++) because C++
+    constructs class hierarchies from the bottom up. For this reason
+    we need a create() function.
+
+    \sa chooseContext(), format(), isValid()
+*/
+
+bool TQGLContext::create( const TQGLContext* shareContext )
+{
+    reset();
+    d->valid = chooseContext( shareContext );
+    return d->valid;
+}
+
+
+
+/*!
+    \fn bool TQGLContext::chooseContext( const TQGLContext* shareContext = 0 )
+
+    This semi-internal function is called by create(). It creates a
+    system-dependent OpenGL handle that matches the format() of \a
+    shareContext as closely as possible.
+
+    On Windows, it calls the virtual function choosePixelFormat(),
+    which finds a matching pixel format identifier. On X11, it calls
+    the virtual function chooseVisual() which finds an appropriate X
+    visual. On other platforms it may work differently.
+*/
+
+
+/*!
+    \fn void TQGLContext::reset()
+
+    Resets the context and makes it invalid.
+
+    \sa create(), isValid()
+*/
+
+
+/*!
+    \fn void TQGLContext::makeCurrent()
+
+    Makes this context the current OpenGL rendering context. All GL
+    functions you call operate on this context until another context
+    is made current.
+
+    In some very rare cases the underlying call may fail. If this
+    occurs an error message is output to stderr.
+*/
+
+
+/*!
+    \fn void TQGLContext::swapBuffers() const
+
+    Swaps the screen contents with an off-screen buffer. Only works if
+    the context is in double buffer mode.
+
+    \sa TQGLFormat::setDoubleBuffer()
+*/
+
+
+/*!
+    \fn void TQGLContext::doneCurrent()
+
+    Makes no GL context the current context. Normally, you do not need
+    to call this function; TQGLContext calls it as necessary.
+*/
+
+
+/*!
+    \fn TQPaintDevice* TQGLContext::device() const
+
+    Returns the paint device set for this context.
+
+    \sa TQGLContext::TQGLContext()
+*/
+
+/*!
+    \fn void TQGLContext::generateFontDisplayLists( const TQFont& font, int listBase )
+
+    Generates a set of 256 display lists for the 256 first characters
+    in the font \a font. The first list will start at index \a listBase.
+
+    \sa TQGLWidget::renderText()
+*/
+
+
+/*****************************************************************************
+  TQGLWidget implementation
+ *****************************************************************************/
+
+
+/*!
+    \class TQGLWidget qgl.h
+    \brief The TQGLWidget class is a widget for rendering OpenGL graphics.
+\if defined(commercial)
+    It is part of the <a href="commercialeditions.html">TQt Enterprise Edition</a>.
+\endif
+
+    \ingroup graphics
+    \ingroup images
+    \mainclass
+    \module OpenGL
+
+    TQGLWidget provides functionality for displaying OpenGL<sup>*</sup>
+    graphics integrated into a TQt application. It is very simple to
+    use. You inherit from it and use the subclass like any other
+    TQWidget, except that instead of drawing the widget's contents
+    using TQPainter etc. you use the standard OpenGL rendering
+    commands.
+
+    TQGLWidget provides three convenient virtual functions that you can
+    reimplement in your subclass to perform the typical OpenGL tasks:
+
+    \list
+    \i paintGL() - Renders the OpenGL scene. Gets called whenever the widget
+    needs to be updated.
+    \i resizeGL() - Sets up the OpenGL viewport, projection, etc. Gets
+    called whenever the the widget has been resized (and also when it
+    is shown for the first time because all newly created widgets get a
+    resize event automatically).
+    \i initializeGL() - Sets up the OpenGL rendering context, defines display
+    lists, etc. Gets called once before the first time resizeGL() or
+    paintGL() is called.
+    \endlist
+
+    Here is a rough outline of how a TQGLWidget subclass might look:
+
+    \code
+    class MyGLDrawer : public TQGLWidget
+    {
+	Q_OBJECT	// must include this if you use TQt signals/slots
+
+    public:
+	MyGLDrawer( TQWidget *parent, const char *name )
+	    : TQGLWidget(parent, name) {}
+
+    protected:
+
+	void initializeGL()
+	{
+	    // Set up the rendering context, define display lists etc.:
+	    ...
+	    glClearColor( 0.0, 0.0, 0.0, 0.0 );
+	    glEnable(GL_DEPTH_TEST);
+	    ...
+	}
+
+	void resizeGL( int w, int h )
+	{
+	    // setup viewport, projection etc.:
+	    glViewport( 0, 0, (GLint)w, (GLint)h );
+	    ...
+	    glFrustum( ... );
+	    ...
+	}
+
+	void paintGL()
+	{
+	    // draw the scene:
+	    ...
+	    glRotatef( ... );
+	    glMaterialfv( ... );
+	    glBegin( GL_QUADS );
+	    glVertex3f( ... );
+	    glVertex3f( ... );
+	    ...
+	    glEnd();
+	    ...
+	}
+
+    };
+    \endcode
+
+    If you need to trigger a repaint from places other than paintGL()
+    (a typical example is when using \link TQTimer timers\endlink to
+    animate scenes), you should call the widget's updateGL() function.
+
+    Your widget's OpenGL rendering context is made current when
+    paintGL(), resizeGL(), or initializeGL() is called. If you need to
+    call the standard OpenGL API functions from other places (e.g. in
+    your widget's constructor or in your own paint functions), you
+    must call makeCurrent() first.
+
+    TQGLWidget provides functions for requesting a new display \link
+    TQGLFormat format\endlink and you can also create widgets with
+    customized rendering \link TQGLContext contexts\endlink.
+
+    You can also share OpenGL display lists between TQGLWidgets (see
+    the documentation of the TQGLWidget constructors for details).
+
+    \section1 Overlays
+
+    The TQGLWidget creates a GL overlay context in addition to the
+    normal context if overlays are supported by the underlying system.
+
+    If you want to use overlays, you specify it in the \link TQGLFormat
+    format\endlink. (Note: Overlay must be requested in the format
+    passed to the TQGLWidget constructor.) Your GL widget should also
+    implement some or all of these virtual methods:
+
+    \list
+    \i paintOverlayGL()
+    \i resizeOverlayGL()
+    \i initializeOverlayGL()
+    \endlist
+
+    These methods work in the same way as the normal paintGL() etc.
+    functions, except that they will be called when the overlay
+    context is made current. You can explicitly make the overlay
+    context current by using makeOverlayCurrent(), and you can access
+    the overlay context directly (e.g. to ask for its transparent
+    color) by calling overlayContext().
+
+    On X servers in which the default visual is in an overlay plane,
+    non-GL TQt windows can also be used for overlays. See the
+    examples/opengl/overlay_x11 example program for details.
+
+    <sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the
+    United States and other countries.
+*/
+
+// ### BCI - fix in 4.0
+
+// the display list cache can't be global because display lists are
+// tied to the GL contexts for each individual widget
+
+class TQGLWidgetPrivate
+{
+public:
+    TQMap<TQString, int> displayListCache;
+};
+
+static TQPtrDict<TQGLWidgetPrivate> * qgl_d_ptr = 0;
+static TQSingleCleanupHandler< TQPtrDict<TQGLWidgetPrivate> > qgl_cleanup_d_ptr;
+
+static TQGLWidgetPrivate * qgl_d( const TQGLWidget * w )
+{
+    if ( !qgl_d_ptr ) {
+	qgl_d_ptr = new TQPtrDict<TQGLWidgetPrivate>;
+	qgl_cleanup_d_ptr.set( &qgl_d_ptr );
+	qgl_d_ptr->setAutoDelete( TRUE );
+    }
+    TQGLWidgetPrivate * ret = qgl_d_ptr->find( (void *) w );
+    if ( !ret ) {
+	ret = new TQGLWidgetPrivate;
+	qgl_d_ptr->replace( (void *) w, ret );
+    }
+    return ret;
+}
+
+void qgl_delete_d( const TQGLWidget * w )
+{
+    if ( qgl_d_ptr )
+	qgl_d_ptr->remove( (void *) w );
+}
+
+/*!
+    Constructs an OpenGL widget with a \a parent widget and a \a name.
+
+    The \link TQGLFormat::defaultFormat() default format\endlink is
+    used. The widget will be \link isValid() invalid\endlink if the
+    system has no \link TQGLFormat::hasOpenGL() OpenGL support\endlink.
+
+    The \a parent, \a name and widget flag, \a f, arguments are passed
+    to the TQWidget constructor.
+
+    If the \a shareWidget parameter points to a valid TQGLWidget, this
+    widget will share OpenGL display lists with \a shareWidget. If
+    this widget and \a shareWidget have different \link format()
+    formats\endlink, display list sharing may fail. You can check
+    whether display list sharing succeeded by calling isSharing().
+
+    The initialization of OpenGL rendering state, etc. should be done
+    by overriding the initializeGL() function, rather than in the
+    constructor of your TQGLWidget subclass.
+
+    \sa TQGLFormat::defaultFormat()
+*/
+
+TQGLWidget::TQGLWidget( TQWidget *parent, const char *name,
+		      const TQGLWidget* shareWidget, WFlags f )
+    : TQWidget( parent, name, f | TQt::WWinOwnDC | TQt::WNoAutoErase )
+{
+    init( new TQGLContext(TQGLFormat::defaultFormat(), this), shareWidget );
+}
+
+
+/*!
+    Constructs an OpenGL widget with parent \a parent, called \a name.
+
+    The \a format argument specifies the desired \link TQGLFormat
+    rendering options \endlink. If the underlying OpenGL/Window system
+    cannot satisfy all the features requested in \a format, the
+    nearest subset of features will be used. After creation, the
+    format() method will return the actual format obtained.
+
+    The widget will be \link isValid() invalid\endlink if the system
+    has no \link TQGLFormat::hasOpenGL() OpenGL support\endlink.
+
+    The \a parent, \a name and widget flag, \a f, arguments are passed
+    to the TQWidget constructor.
+
+    If the \a shareWidget parameter points to a valid TQGLWidget, this
+    widget will share OpenGL display lists with \a shareWidget. If
+    this widget and \a shareWidget have different \link format()
+    formats\endlink, display list sharing may fail. You can check
+    whether display list sharing succeeded by calling isSharing().
+
+    The initialization of OpenGL rendering state, etc. should be done
+    by overriding the initializeGL() function, rather than in the
+    constructor of your TQGLWidget subclass.
+
+    \sa TQGLFormat::defaultFormat(), isValid()
+*/
+
+TQGLWidget::TQGLWidget( const TQGLFormat &format, TQWidget *parent,
+		      const char *name, const TQGLWidget* shareWidget,
+		      WFlags f )
+    : TQWidget( parent, name, f | TQt::WWinOwnDC | TQt::WNoAutoErase )
+{
+    init( new TQGLContext(format, this), shareWidget );
+}
+
+/*!
+    Constructs an OpenGL widget with parent \a parent, called \a name.
+
+    The \a context argument is a pointer to the TQGLContext that
+    you wish to be bound to this widget. This allows you to pass in
+    your own TQGLContext sub-classes.
+
+    The widget will be \link isValid() invalid\endlink if the system
+    has no \link TQGLFormat::hasOpenGL() OpenGL support\endlink.
+
+    The \a parent, \a name and widget flag, \a f, arguments are passed
+    to the TQWidget constructor.
+
+    If the \a shareWidget parameter points to a valid TQGLWidget, this
+    widget will share OpenGL display lists with \a shareWidget. If
+    this widget and \a shareWidget have different \link format()
+    formats\endlink, display list sharing may fail. You can check
+    whether display list sharing succeeded by calling isSharing().
+
+    The initialization of OpenGL rendering state, etc. should be done
+    by overriding the initializeGL() function, rather than in the
+    constructor of your TQGLWidget subclass.
+
+    \sa TQGLFormat::defaultFormat(), isValid()
+*/
+TQGLWidget::TQGLWidget( TQGLContext *context, TQWidget *parent,
+		      const char *name, const TQGLWidget *shareWidget, WFlags f )
+    : TQWidget( parent, name, f | TQt::WWinOwnDC | TQt::WNoAutoErase )
+{
+    init( context, shareWidget );
+}
+
+/*!
+    Destroys the widget.
+*/
+
+TQGLWidget::~TQGLWidget()
+{
+#if defined(GLX_MESA_release_buffers) && defined(TQGL_USE_MESA_EXT)
+    bool doRelease = ( glcx && glcx->windowCreated() );
+#endif
+    qgl_delete_d( this );
+    delete glcx;
+#if defined(Q_WGL)
+    delete olcx;
+#endif
+#if defined(GLX_MESA_release_buffers) && defined(TQGL_USE_MESA_EXT)
+    if ( doRelease )
+	glXReleaseBuffersMESA( x11Display(), winId() );
+#endif
+#if defined(Q_WS_MAC)
+    if(gl_pix) {
+	delete gl_pix;
+	gl_pix = NULL;
+    }
+#endif
+    cleanupColormaps();
+}
+
+
+
+
+
+/*!
+    \fn TQGLFormat TQGLWidget::format() const
+
+    Returns the format of the contained GL rendering context.
+*/
+
+/*!
+    \fn bool TQGLWidget::doubleBuffer() const
+
+    Returns TRUE if the contained GL rendering context has double
+    buffering; otherwise returns FALSE.
+
+    \sa TQGLFormat::doubleBuffer()
+*/
+
+/*!
+    \fn void TQGLWidget::setAutoBufferSwap( bool on )
+
+    If \a on is TRUE automatic GL buffer swapping is switched on;
+    otherwise it is switched off.
+
+    If \a on is TRUE and the widget is using a double-buffered format,
+    the background and foreground GL buffers will automatically be
+    swapped after each paintGL() call.
+
+    The buffer auto-swapping is on by default.
+
+    \sa autoBufferSwap(), doubleBuffer(), swapBuffers()
+*/
+
+/*!
+    \fn bool TQGLWidget::autoBufferSwap() const
+
+    Returns TRUE if the widget is doing automatic GL buffer swapping;
+    otherwise returns FALSE.
+
+    \sa setAutoBufferSwap()
+*/
+
+/*!
+    \fn bool TQGLWidget::isValid() const
+
+    Returns TRUE if the widget has a valid GL rendering context;
+    otherwise returns FALSE. A widget will be invalid if the system
+    has no \link TQGLFormat::hasOpenGL() OpenGL support\endlink.
+*/
+
+bool TQGLWidget::isValid() const
+{
+    return glcx->isValid();
+}
+
+/*!
+    \fn bool TQGLWidget::isSharing() const
+
+    Returns TRUE if display list sharing with another TQGLWidget was
+    requested in the constructor, and the GL system was able to
+    provide it; otherwise returns FALSE. The GL system may fail to
+    provide display list sharing if the two TQGLWidgets use different
+    formats.
+
+    \sa format()
+*/
+
+bool TQGLWidget::isSharing() const
+{
+    return glcx->isSharing();
+}
+
+/*!
+    \fn void TQGLWidget::makeCurrent()
+
+    Makes this widget the current widget for OpenGL operations, i.e.
+    makes the widget's rendering context the current OpenGL rendering
+    context.
+*/
+
+void TQGLWidget::makeCurrent()
+{
+#if defined( Q_WS_MAC )
+    macInternalDoubleBuffer(); //make sure the correct context is used
+#endif
+    glcx->makeCurrent();
+}
+
+/*!
+    \fn void TQGLWidget::doneCurrent()
+
+    Makes no GL context the current context. Normally, you do not need
+    to call this function; TQGLContext calls it as necessary. However,
+    it may be useful in multithreaded environments.
+*/
+
+void TQGLWidget::doneCurrent()
+{
+    glcx->doneCurrent();
+}
+
+/*!
+    \fn void TQGLWidget::swapBuffers()
+
+    Swaps the screen contents with an off-screen buffer. This only
+    works if the widget's format specifies double buffer mode.
+
+    Normally, there is no need to explicitly call this function
+    because it is done automatically after each widget repaint, i.e.
+    each time after paintGL() has been executed.
+
+    \sa doubleBuffer(), setAutoBufferSwap(), TQGLFormat::setDoubleBuffer()
+*/
+
+void TQGLWidget::swapBuffers()
+{
+    glcx->swapBuffers();
+#if defined(Q_WS_MAC)
+    if(macInternalDoubleBuffer() && gl_pix)
+	bitBlt(this, 0, 0, gl_pix);
+#endif
+}
+
+
+/*!
+    \fn const TQGLContext* TQGLWidget::overlayContext() const
+
+    Returns the overlay context of this widget, or 0 if this widget
+    has no overlay.
+
+    \sa context()
+*/
+
+
+
+/*!
+    \fn void TQGLWidget::makeOverlayCurrent()
+
+    Makes the overlay context of this widget current. Use this if you
+    need to issue OpenGL commands to the overlay context outside of
+    initializeOverlayGL(), resizeOverlayGL(), and paintOverlayGL().
+
+    Does nothing if this widget has no overlay.
+
+    \sa makeCurrent()
+*/
+
+
+/*
+  \obsolete
+
+  Sets a new format for this widget.
+
+  If the underlying OpenGL/Window system cannot satisfy all the
+  features requested in \a format, the nearest subset of features will
+  be used. After creation, the format() method will return the actual
+  rendering context format obtained.
+
+  The widget will be assigned a new TQGLContext, and the initializeGL()
+  function will be executed for this new context before the first
+  resizeGL() or paintGL().
+
+  This method will try to keep any existing display list sharing with
+  other TQGLWidgets, but it may fail. Use isSharing() to test.
+
+  \sa format(), isSharing(), isValid()
+*/
+
+void TQGLWidget::setFormat( const TQGLFormat &format )
+{
+    setContext( new TQGLContext(format,this) );
+}
+
+
+
+
+/*!
+    \fn const TQGLContext *TQGLWidget::context() const
+
+    Returns the context of this widget.
+
+    It is possible that the context is not valid (see isValid()), for
+    example, if the underlying hardware does not support the format
+    attributes that were requested.
+*/
+
+/*
+  \obsolete
+
+  \fn void TQGLWidget::setContext( TQGLContext *context,
+				  const TQGLContext* shareContext,
+				  bool deleteOldContext )
+
+  Sets a new context for this widget. The TQGLContext \a context must
+  be created using \e new. TQGLWidget will delete \a context when
+  another context is set or when the widget is destroyed.
+
+  If \a context is invalid, TQGLContext::create() is performed on
+  it. The initializeGL() function will then be executed for the new
+  context before the first resizeGL() or paintGL().
+
+  If \a context is invalid, this method will try to keep any existing
+  display list sharing with other TQGLWidgets this widget currently
+  has, or (if \a shareContext points to a valid context) start display
+  list sharing with that context, but it may fail. Use isSharing() to
+  test.
+
+  If \a deleteOldContext is TRUE (the default), the existing context
+  will be deleted. You may use FALSE here if you have kept a pointer
+  to the old context (as returned by context()), and want to restore
+  that context later.
+
+  \sa context(), isSharing()
+*/
+
+
+
+/*!
+    \fn void TQGLWidget::updateGL()
+
+    Updates the widget by calling glDraw().
+*/
+
+void TQGLWidget::updateGL()
+{
+    glDraw();
+}
+
+
+/*!
+    \fn void TQGLWidget::updateOverlayGL()
+
+    Updates the widget's overlay (if any). Will cause the virtual
+    function paintOverlayGL() to be executed.
+
+    The widget's rendering context will become the current context and
+    initializeGL() will be called if it hasn't already been called.
+*/
+
+
+/*!
+    This virtual function is called once before the first call to
+    paintGL() or resizeGL(), and then once whenever the widget has
+    been assigned a new TQGLContext. Reimplement it in a subclass.
+
+    This function should set up any retquired OpenGL context rendering
+    flags, defining display lists, etc.
+
+    There is no need to call makeCurrent() because this has already
+    been done when this function is called.
+*/
+
+void TQGLWidget::initializeGL()
+{
+}
+
+
+/*!
+    This virtual function is called whenever the widget needs to be
+    painted. Reimplement it in a subclass.
+
+    There is no need to call makeCurrent() because this has already
+    been done when this function is called.
+*/
+
+void TQGLWidget::paintGL()
+{
+}
+
+
+/*!
+    \fn void TQGLWidget::resizeGL( int width , int height )
+
+    This virtual function is called whenever the widget has been
+    resized. The new size is passed in \a width and \a height.
+    Reimplement it in a subclass.
+
+    There is no need to call makeCurrent() because this has already
+    been done when this function is called.
+*/
+
+void TQGLWidget::resizeGL( int, int )
+{
+}
+
+
+
+/*!
+    This virtual function is used in the same manner as initializeGL()
+    except that it operates on the widget's overlay context instead of
+    the widget's main context. This means that initializeOverlayGL()
+    is called once before the first call to paintOverlayGL() or
+    resizeOverlayGL(). Reimplement it in a subclass.
+
+    This function should set up any retquired OpenGL context rendering
+    flags, defining display lists, etc. for the overlay context.
+
+    There is no need to call makeOverlayCurrent() because this has
+    already been done when this function is called.
+*/
+
+void TQGLWidget::initializeOverlayGL()
+{
+}
+
+
+/*!
+    This virtual function is used in the same manner as paintGL()
+    except that it operates on the widget's overlay context instead of
+    the widget's main context. This means that paintOverlayGL() is
+    called whenever the widget's overlay needs to be painted.
+    Reimplement it in a subclass.
+
+    There is no need to call makeOverlayCurrent() because this has
+    already been done when this function is called.
+*/
+
+void TQGLWidget::paintOverlayGL()
+{
+}
+
+
+/*!
+    \fn void TQGLWidget::resizeOverlayGL( int width , int height )
+
+    This virtual function is used in the same manner as paintGL()
+    except that it operates on the widget's overlay context instead of
+    the widget's main context. This means that resizeOverlayGL() is
+    called whenever the widget has been resized. The new size is
+    passed in \a width and \a height. Reimplement it in a subclass.
+
+    There is no need to call makeOverlayCurrent() because this has
+    already been done when this function is called.
+*/
+
+void TQGLWidget::resizeOverlayGL( int, int )
+{
+}
+
+
+
+
+/*!
+    Handles paint events. Will cause the virtual paintGL() function to
+    be called.
+
+    The widget's rendering context will become the current context and
+    initializeGL() will be called if it hasn't already been called.
+*/
+
+void TQGLWidget::paintEvent( TQPaintEvent * )
+{
+    glDraw();
+    updateOverlayGL();
+}
+
+
+/*!
+    \fn void TQGLWidget::resizeEvent( TQResizeEvent * )
+
+    Handles resize events. Calls the virtual function resizeGL().
+*/
+
+
+/*!
+  \fn void TQGLWidget::setMouseTracking( bool enable )
+
+  \reimp
+*/
+
+
+/*!
+    Renders the current scene on a pixmap and returns the pixmap.
+
+    You can use this method on both visible and invisible TQGLWidgets.
+
+    This method will create a pixmap and a temporary TQGLContext to
+    render on the pixmap. It will then call initializeGL(),
+    resizeGL(), and paintGL() on this context. Finally, the widget's
+    original GL context is restored.
+
+    The size of the pixmap will be \a w pixels wide and \a h pixels
+    high unless one of these parameters is 0 (the default), in which
+    case the pixmap will have the same size as the widget.
+
+    If \a useContext is TRUE, this method will try to be more
+    efficient by using the existing GL context to render the pixmap.
+    The default is FALSE. Only use TRUE if you understand the risks.
+
+    Overlays are not rendered onto the pixmap.
+
+    If the GL rendering context and the desktop have different bit
+    depths, the result will most likely look surprising.
+
+    Note that the creation of display lists, modifications of the view
+    frustum etc. should be done from within initializeGL(). If this is
+    not done, the temporary TQGLContext will not be initialized
+    properly, and the rendered pixmap may be incomplete/corrupted.
+*/
+
+TQPixmap TQGLWidget::renderPixmap( int w, int h, bool useContext )
+{
+    TQSize sz = size();
+    if ( (w > 0) && (h > 0) )
+	sz = TQSize( w, h );
+
+#if defined(Q_WS_X11)
+    TQPixmap pm( sz.width(), sz.height(), x11Depth() );
+    bool needConversion = x11Visual() != TQPaintDevice::x11AppVisual();
+
+    // make sure the pixmap uses the same visual as the widget itself
+    if ( needConversion ) {
+        TQPaintDeviceX11Data* xd = pm.getX11Data( TRUE );
+        xd->x_depth = x11Depth();
+        xd->x_visual = (Visual *) x11Visual();
+        pm.setX11Data( xd );
+    }
+#else
+    TQPixmap pm;
+    pm.resize( sz );
+#endif
+
+    glcx->doneCurrent();
+
+    bool success = TRUE;
+
+    if ( useContext && isValid() && renderCxPm( &pm ) )
+	return pm;
+
+    TQGLFormat fmt = glcx->requestedFormat();
+    fmt.setDirectRendering( FALSE );		// Direct is unlikely to work
+    fmt.setDoubleBuffer( FALSE );		// We don't need dbl buf
+
+    TQGLContext* ocx = glcx;
+    bool wasCurrent = (TQGLContext::currentContext() == ocx );
+    ocx->doneCurrent();
+    glcx = new TQGLContext( fmt, &pm );
+    glcx->create();
+
+    if ( glcx->isValid() )
+	updateGL();
+    else
+	success = FALSE;
+
+    delete glcx;
+    glcx = ocx;
+
+    if ( wasCurrent )
+	ocx->makeCurrent();
+
+    if ( success ) {
+#if defined(Q_WS_X11)
+	if ( needConversion ) {
+	    TQImage image = pm.convertToImage();
+	    TQPixmap p;
+	    p = image;
+	    return p;
+	}
+#endif
+	return pm;
+    } else
+	return TQPixmap();
+}
+
+
+
+/*!
+    Returns an image of the frame buffer. If \a withAlpha is TRUE the
+    alpha channel is included.
+
+    Depending on your hardware, you can explicitly select which color
+    buffer to grab with a glReadBuffer() call before calling this
+    function.
+*/
+TQImage TQGLWidget::grabFrameBuffer( bool withAlpha )
+{
+#if defined( Q_WS_MAC )
+    if(dblbuf == macInternalDoubleBuffer(FALSE) && gl_pix) //why not optimize?
+	return ((TQPixmap*)gl_pix)->convertToImage();
+#endif
+    makeCurrent();
+    TQImage res;
+    int w = width();
+    int h = height();
+    if ( format().rgba() ) {
+	res = TQImage( w, h, 32 );
+	glReadPixels( 0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, res.bits() );
+	if ( TQImage::systemByteOrder() == TQImage::BigEndian ) {
+	    // OpenGL gives RGBA; TQt wants ARGB
+	    uint *p = (uint*)res.bits();
+	    uint *end = p + w*h;
+	    if ( withAlpha && format().alpha() ) {
+		while ( p < end ) {
+		    uint a = *p << 24;
+		    *p = (*p >> 8) | a;
+		    p++;
+		}
+	    }
+	    else {
+		while ( p < end )
+		    *p++ >>= 8;
+	    }
+	}
+	else {
+	    // OpenGL gives ABGR (i.e. RGBA backwards); TQt wants ARGB
+	    res = res.swapRGB();
+	}
+	res.setAlphaBuffer( withAlpha && format().alpha() );
+    }
+    else {
+#if defined (Q_WS_WIN)
+	res = TQImage( w, h, 8 );
+	glReadPixels( 0, 0, w, h, GL_COLOR_INDEX, GL_UNSIGNED_BYTE,
+		      res.bits() );
+	int palSize = 0;
+	const TQRgb* pal = TQColor::palette( &palSize );
+	if ( pal && palSize ) {
+	    res.setNumColors( palSize );
+	    for ( int i = 0; i < palSize; i++ )
+		res.setColor( i, pal[i] );
+	}
+#endif
+    }
+
+    return res.mirror();
+}
+
+
+
+/*!
+    Initializes OpenGL for this widget's context. Calls the virtual
+    function initializeGL().
+*/
+
+void TQGLWidget::glInit()
+{
+    if ( !isValid() )
+	return;
+    makeCurrent();
+    initializeGL();
+    glcx->setInitialized( TRUE );
+}
+
+
+/*!
+    Executes the virtual function paintGL().
+
+    The widget's rendering context will become the current context and
+    initializeGL() will be called if it hasn't already been called.
+*/
+
+void TQGLWidget::glDraw()
+{
+    if ( !isValid() )
+	return;
+    makeCurrent();
+    if ( glcx->deviceIsPixmap() )
+	glDrawBuffer( GL_FRONT );
+    if ( !glcx->initialized() ) {
+	glInit();
+	TQPaintDeviceMetrics dm( glcx->device() );
+	resizeGL( dm.width(), dm.height() ); // New context needs this "resize"
+    }
+    paintGL();
+    if ( doubleBuffer() ) {
+	if ( autoSwap )
+	    swapBuffers();
+    } else {
+	glFlush();
+#if defined( Q_WS_MAC )
+	if(dblbuf && gl_pix)
+	    bitBlt(this, 0, 0, gl_pix);
+#endif
+    }
+}
+
+
+/*!
+    Convenience function for specifying a drawing color to OpenGL.
+    Calls glColor3 (in RGBA mode) or glIndex (in color-index mode)
+    with the color \a c. Applies to the current GL context.
+
+    \sa qglClearColor(), TQGLContext::currentContext(), TQColor
+*/
+
+void TQGLWidget::qglColor( const TQColor& c ) const
+{
+    const TQGLContext* ctx = TQGLContext::currentContext();
+    if ( ctx ) {
+	if ( ctx->format().rgba() )
+	    glColor3ub( c.red(), c.green(), c.blue() );
+
+	else if ( ctx->device() == context()->device()
+                  && !cmap.isEmpty() ) { // TQGLColormap in use?
+	    int i = cmap.find( c.rgb() );
+	    if ( i < 0 )
+		i = cmap.findNearest( c.rgb() );
+	    glIndexi( i );
+	} else
+	    glIndexi( ctx->colorIndex( c ) );
+    }
+}
+
+/*!
+    Convenience function for specifying the clearing color to OpenGL.
+    Calls glClearColor (in RGBA mode) or glClearIndex (in color-index
+    mode) with the color \a c. Applies to the current GL context.
+
+    \sa qglColor(), TQGLContext::currentContext(), TQColor
+*/
+
+void TQGLWidget::qglClearColor( const TQColor& c ) const
+{
+    const TQGLContext* ctx = TQGLContext::currentContext();
+    if ( ctx ) {
+	if ( ctx->format().rgba() )
+	    glClearColor( (GLfloat)c.red() / 255.0, (GLfloat)c.green() / 255.0,
+			  (GLfloat)c.blue() / 255.0, (GLfloat) 0.0 );
+	else if ( ctx->device() == context()->device()
+                  && !cmap.isEmpty() ) { // TQGLColormap in use?
+	    int i = cmap.find( c.rgb() );
+	    if ( i < 0 )
+		i = cmap.findNearest( c.rgb() );
+	    glClearIndex( i );
+	} else
+	    glClearIndex( ctx->colorIndex( c ) );
+    }
+}
+
+
+/*!
+    Converts the image \a img into the unnamed format expected by
+    OpenGL functions such as glTexImage2D(). The returned image is not
+    usable as a TQImage, but TQImage::width(), TQImage::height() and
+    TQImage::bits() may be used with OpenGL. The following few lines
+    are from the texture example. Most of the code is irrelevant, so
+    we just quote the relevant bits:
+
+    \quotefile opengl/texture/gltexobj.cpp
+    \skipto tex1
+    \printline tex1
+    \printline gllogo.bmp
+
+    We create \e tex1 (and another variable) for OpenGL, and load a real
+    image into \e buf.
+
+    \skipto convertToGLFormat
+    \printline convertToGLFormat
+
+    A few lines later, we convert \e buf into OpenGL format and store it
+    in \e tex1.
+
+    \skipto glTexImage2D
+    \printline glTexImage2D
+    \printline tex1.bits
+
+    Note the dimension restrictions for texture images as described in
+    the glTexImage2D() documentation. The width must be 2^m + 2*border
+    and the height 2^n + 2*border where m and n are integers and
+    border is either 0 or 1.
+
+    Another function in the same example uses \e tex1 with OpenGL.
+*/
+
+
+TQImage TQGLWidget::convertToGLFormat( const TQImage& img )
+{
+    TQImage res = img.convertDepth( 32 );
+    res = res.mirror();
+
+    if ( TQImage::systemByteOrder() == TQImage::BigEndian ) {
+	// TQt has ARGB; OpenGL wants RGBA
+	for ( int i=0; i < res.height(); i++ ) {
+	    uint *p = (uint*)res.scanLine( i );
+	    uint *end = p + res.width();
+	    while ( p < end ) {
+		*p = (*p << 8) | ((*p >> 24) & 0xFF);
+		p++;
+	    }
+	}
+    }
+    else {
+	// TQt has ARGB; OpenGL wants ABGR (i.e. RGBA backwards)
+	res = res.swapRGB();
+    }
+    return res;
+}
+
+
+/*!
+    \fn TQGLColormap & TQGLWidget::colormap() const
+
+    Returns the colormap for this widget.
+
+    Usually it is only top-level widgets that can have different
+    colormaps installed. Asking for the colormap of a child widget
+    will return the colormap for the child's top-level widget.
+
+    If no colormap has been set for this widget, the TQColormap
+    returned will be empty.
+
+    \sa setColormap()
+*/
+
+/*!
+    \fn void TQGLWidget::setColormap( const TQGLColormap & cmap )
+
+    Set the colormap for this widget to \a cmap. Usually it is only
+    top-level widgets that can have colormaps installed.
+
+    \sa colormap()
+*/
+
+int TQGLWidget::displayListBase( const TQFont & fnt, int listBase )
+{
+    int base;
+
+    TQGLWidgetPrivate * d = qgl_d( this );
+    if ( !d || !glcx ) { // this can't happen unless we run out of mem
+	return 0;
+    }
+
+    // always regenerate font disp. lists for pixmaps - hw accelerated
+    // contexts can't handle this otherwise
+    bool regenerate = glcx->deviceIsPixmap();
+
+#if 0 // QT_NO_XFTFREETYPE
+    // font color needs to be part of the font cache key when using
+    // antialiased fonts since one set of glyphs needs to be generated
+    // for each font color
+    TQString color_key;
+    if (fnt.styleStrategy() != TQFont::NoAntialias) {
+	GLfloat color[4];
+	glGetFloatv(GL_CURRENT_COLOR, color);
+	color_key.sprintf("%f_%f_%f",color[0], color[1], color[2]);
+    }
+    TQString key = fnt.key() + color_key + TQString::number((int) regenerate);
+#else
+    TQString key = fnt.key() + TQString::number((int) regenerate);
+#endif
+
+    if ( !regenerate && (d->displayListCache.find( key ) != d->displayListCache.end()) ) {
+	base = d->displayListCache[ key ];
+    } else {
+	int maxBase = listBase - 256;
+	TQMapConstIterator<TQString,int> it;
+	for ( it = d->displayListCache.begin(); it != d->displayListCache.end(); ++it ) {
+	    if ( maxBase < it.data() ) {
+		maxBase = it.data();
+	    }
+	}
+	maxBase += 256;
+	glcx->generateFontDisplayLists( fnt, maxBase );
+	d->displayListCache[ key ] = maxBase;
+	base = maxBase;
+    }
+    return base;
+}
+
+/*!
+   Renders the string \a str into the GL context of this widget.
+
+   \a x and \a y are specified in window coordinates, with the origin
+   in the upper left-hand corner of the window. If \a fnt is not
+   specified, the currently set application font will be used to
+   render the string. To change the color of the rendered text you can
+   use the glColor() call (or the qglColor() convenience function),
+   just before the renderText() call. Note that if you have
+   GL_LIGHTING enabled, the string will not appear in the color you
+   want. You should therefore switch lighting off before using
+   renderText().
+
+   \a listBase specifies the index of the first display list that is
+   generated by this function. The default value is 2000. 256 display
+   lists will be generated, one for each of the first 256 characters
+   in the font that is used to render the string. If several fonts are
+   used in the same widget, the display lists for these fonts will
+   follow the last generated list. You would normally not have to
+   change this value unless you are using lists in the same range. The
+   lists are deleted when the widget is destroyed.
+
+   Note: This function only works reliably with ASCII strings.
+*/
+
+void TQGLWidget::renderText( int x, int y, const TQString & str, const TQFont & fnt, int listBase )
+{
+    if (str.isEmpty())
+        return;
+    makeCurrent();
+    glPushAttrib( GL_TRANSFORM_BIT | GL_VIEWPORT_BIT | GL_LIST_BIT | GL_CURRENT_BIT );
+    glMatrixMode( GL_PROJECTION );
+    glPushMatrix();
+    glLoadIdentity();
+    glOrtho( 0, width(), height(), 0, -1, 1 );
+    glMatrixMode( GL_MODELVIEW );
+    glPushMatrix();
+    glLoadIdentity();
+
+    glRasterPos2i( 0, 0 );
+    glBitmap(0, 0, 0, 0, x, -y, NULL);
+    glListBase( displayListBase( fnt, listBase ) );
+    const char *cstr = str.latin1();
+    glCallLists( qstrlen(cstr), GL_UNSIGNED_BYTE, cstr );
+
+    // restore the matrix stacks and GL state
+    glPopMatrix();
+    glMatrixMode( GL_PROJECTION );
+    glPopMatrix();
+    glPopAttrib();
+}
+
+/*! \overload
+
+    \a x, \a y and \a z are specified in scene or object coordinates
+    relative to the currently set projection and model matrices. This
+    can be useful if you want to annotate models with text labels and
+    have the labels move with the model as it is rotated etc.
+*/
+void TQGLWidget::renderText( double x, double y, double z, const TQString & str, const TQFont & fnt,
+			    int listBase )
+{
+    if (str.isEmpty())
+        return;
+    makeCurrent();
+    glRasterPos3d( x, y, z );
+    glPushAttrib( GL_LIST_BIT );
+    glListBase( displayListBase( fnt, listBase ) );
+    const char *cstr = str.latin1();
+    glCallLists( qstrlen(cstr), GL_UNSIGNED_BYTE, cstr );
+    glPopAttrib();
+}
+
+/*****************************************************************************
+  TQGL classes overview documentation.
+ *****************************************************************************/
+
+/*!
+
+\page opengl.html
+
+\title TQt OpenGL 3D Graphics
+
+\if defined(commercial)
+This module is part of the \link commercialeditions.html TQt Enterprise
+Edition\endlink.
+\endif
+
+\section1 Introduction
+
+OpenGL is a standard API for rendering 3D graphics.
+
+OpenGL only deals with 3D rendering and provides little or no support
+for GUI programming issues. The user interface for an
+OpenGL<sup>*</sup> application must be created with another toolkit,
+such as Motif on the X platform, Microsoft Foundation Classes (MFC)
+under Windows, or TQt on \e both platforms.
+
+The TQt OpenGL module makes it easy to use OpenGL in TQt applications.
+It provides an OpenGL widget class that can be used just like any
+other TQt widget, except that it opens an OpenGL display buffer where
+you can use the OpenGL API to render the contents.
+
+The TQt OpenGL module is implemented as a platform-independent TQt/C++
+wrapper around the platform-dependent GLX, WGL, or AGL C APIs. The
+functionality provided is very similar to Mark Kilgard's GLUT library,
+but with much more non-OpenGL-specific GUI functionality, i.e. the
+whole TQt API.
+
+\section1 Installation
+
+When you install TQt for X11, the configure script will autodetect if
+OpenGL headers and libraries are installed on your system, and if so,
+it will include the TQt OpenGL module in the TQt library. (If your
+OpenGL headers or libraries are placed in a non-standard directory,
+you may need to change the QMAKE_INCDIR_OPENGL and/or
+QMAKE_LIBDIR_OPENGL in the config file for your system). Some
+configurations retquire threading to be enabled for OpenGL, so if
+OpenGL is not detected, try \c{configure -thread}.
+
+When you install TQt for Windows, the TQt OpenGL module is always
+included.
+
+The TQt OpenGL module is not licensed for use with the TQt Professional
+Edition. Consider upgrading to the TQt Enterprise Edition if you
+retquire OpenGL support.
+
+Note about using Mesa on X11: Mesa versions earlier than 3.1 would use
+the name "MesaGL" and "MesaGLU" for the libraries, instead of "GL" and
+"GLU". If you want to use a pre-3.1 version of Mesa, you must change
+the Makefiles to use these library names instead. The easiest way to
+do this is to edit the QMAKE_LIBS_OPENGL line in the config file you
+are using, changing "-lGL -lGLU" to "-lMesaGL -lMesaGLU"; then run
+"configure" again.
+
+\section1 The TQGL Classes
+
+The OpenGL support classes in TQt are:
+\list
+\i \link TQGLWidget TQGLWidget\endlink: An easy-to-use TQt
+  widget for rendering OpenGL scenes.
+\i \link TQGLContext TQGLContext\endlink: Encapsulates an OpenGL rendering context.
+\i \link TQGLFormat TQGLFormat\endlink: Specifies the
+display format of a rendering context.
+\i \link TQGLColormap TQGLColormap\endlink: Handles indexed
+colormaps in GL-index mode.
+\endlist
+
+Many applications only need the high-level TQGLWidget class. The other
+TQGL classes provide advanced features. X11 users might like to read
+the notes on \link opengl-x11-overlays.html overlays\endlink.
+
+See also the \link opengl-examples.html OpenGL examples\endlink.
+
+The TQGL documentation assumes that you are familiar with OpenGL
+programming. If you're new to the subject a good starting point is
+\l{http://www.opengl.org/}.
+
+
+<sup>*</sup> OpenGL is a trademark of Silicon Graphics, Inc. in the
+United States and other countries.
+
+*/
+
+/*!
+    \enum TQGL::FormatOption
+
+    This enum specifies the format options.
+
+    \value DoubleBuffer
+    \value DepthBuffer
+    \value Rgba
+    \value AlphaChannel
+    \value AccumBuffer
+    \value StencilBuffer
+    \value StereoBuffers
+    \value DirectRendering
+    \value HasOverlay
+    \value SingleBuffer
+    \value NoDepthBuffer
+    \value ColorIndex
+    \value NoAlphaChannel
+    \value NoAccumBuffer
+    \value NoStencilBuffer
+    \value NoStereoBuffers
+    \value IndirectRendering
+    \value NoOverlay
+*/
diff --git a/src/opengl/qgl.h b/src/opengl/qgl.h
new file mode 100644
index 000000000..def1a763c
--- /dev/null
+++ b/src/opengl/qgl.h
@@ -0,0 +1,541 @@
+/****************************************************************************
+**
+** Definition of OpenGL classes for TQt
+**
+** Created : 970112
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the opengl module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file.  Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#ifndef TQGL_H
+#define TQGL_H
+
+#ifndef QT_H
+#include "qwidget.h"
+#include "qglcolormap.h"
+#endif // QT_H
+
+#if !defined( QT_MODULE_OPENGL ) || defined( QT_LICENSE_PROFESSIONAL )
+#define TQM_EXPORT_OPENGL
+#else
+#define TQM_EXPORT_OPENGL Q_EXPORT
+#endif
+
+#ifndef QT_NO_COMPAT
+#define TQGL_VERSION	450
+#define TQGL_VERSION_STR	"4.5"
+TQM_EXPORT_OPENGL inline const char *qGLVersion() {
+    qObsolete( 0, "qGLVersion", "qVersion" );
+    return TQGL_VERSION_STR;
+}
+#endif
+
+#if defined(Q_WS_WIN)
+# include "qt_windows.h"
+#endif
+
+#if defined(Q_WS_MAC)
+#if !defined( TQMAC_OPENGL_DOUBLEBUFFER )
+/* This macro is different now. If the macro is not defined TQGLWidget will
+ * try to determine when you need double buffering.  If set to 0 it will
+ * never double buffer and *can* be acclerated. If set to 1 (the default)
+ * it will always double buffer. Unlike before the value of this macro does
+ * not upset binary compatability either. */
+#if QT_MACOSX_VERSION >= 0x1020
+# define TQMAC_OPENGL_DOUBLEBUFFER 0
+#endif
+#endif
+# include <OpenGL/gl.h>
+# include <OpenGL/glu.h>
+#else
+# include <GL/gl.h>
+# include <GL/glu.h>
+#endif
+
+#if defined(Q_WS_WIN) || defined(Q_WS_MAC)
+class TQGLCmap;
+#endif
+
+class TQPixmap;
+#if defined(Q_WS_X11)
+class TQGLOverlayWidget;
+#endif
+
+// Namespace class:
+class TQM_EXPORT_OPENGL TQGL
+{
+public:
+    enum FormatOption {
+	DoubleBuffer		= 0x0001,
+	DepthBuffer		= 0x0002,
+	Rgba			= 0x0004,
+	AlphaChannel		= 0x0008,
+	AccumBuffer		= 0x0010,
+	StencilBuffer		= 0x0020,
+	StereoBuffers		= 0x0040,
+	DirectRendering		= 0x0080,
+	HasOverlay		= 0x0100,
+	SingleBuffer            = DoubleBuffer  << 16,
+	NoDepthBuffer           = DepthBuffer   << 16,
+	ColorIndex              = Rgba          << 16,
+	NoAlphaChannel          = AlphaChannel  << 16,
+	NoAccumBuffer           = AccumBuffer   << 16,
+	NoStencilBuffer         = StencilBuffer << 16,
+	NoStereoBuffers         = StereoBuffers << 16,
+	IndirectRendering       = DirectRendering << 16,
+	NoOverlay		= HasOverlay << 16
+    };
+};
+
+
+
+class TQM_EXPORT_OPENGL TQGLFormat : public TQGL
+{
+public:
+    TQGLFormat();
+    TQGLFormat( int options, int plane = 0 );
+
+    bool doubleBuffer() const;
+    void setDoubleBuffer( bool enable );
+    bool depth() const;
+    void setDepth( bool enable );
+    bool rgba() const;
+    void setRgba( bool enable );
+    bool alpha() const;
+    void setAlpha( bool enable );
+    bool accum() const;
+    void setAccum( bool enable );
+    bool stencil() const;
+    void setStencil( bool enable );
+    bool stereo() const;
+    void setStereo( bool enable );
+    bool directRendering() const;
+    void setDirectRendering( bool enable );
+    bool hasOverlay() const;
+    void setOverlay( bool enable );
+
+    int plane() const;
+    void setPlane( int plane );
+
+    void setOption( FormatOption opt );
+    bool testOption( FormatOption opt ) const;
+
+    static TQGLFormat defaultFormat();
+    static void setDefaultFormat( const TQGLFormat& f );
+
+    static TQGLFormat defaultOverlayFormat();
+    static void setDefaultOverlayFormat( const TQGLFormat& f );
+
+    static bool hasOpenGL();
+    static bool hasOpenGLOverlays();
+
+    friend TQM_EXPORT_OPENGL bool operator==( const TQGLFormat&,
+					     const TQGLFormat& );
+    friend TQM_EXPORT_OPENGL bool operator!=( const TQGLFormat&,
+					     const TQGLFormat& );
+private:
+    uint opts;
+    int pln;
+};
+
+
+TQM_EXPORT_OPENGL bool operator==( const TQGLFormat&, const TQGLFormat& );
+TQM_EXPORT_OPENGL bool operator!=( const TQGLFormat&, const TQGLFormat& );
+
+class TQM_EXPORT_OPENGL TQGLContext : public TQGL
+{
+public:
+    TQGLContext( const TQGLFormat& format, TQPaintDevice* device );
+    TQGLContext( const TQGLFormat& format );
+    virtual ~TQGLContext();
+
+    virtual bool create( const TQGLContext* shareContext = 0 );
+    bool isValid() const;
+    bool isSharing() const;
+    virtual void reset();
+
+    TQGLFormat format() const;
+    TQGLFormat requestedFormat() const;
+    virtual void setFormat( const TQGLFormat& format );
+
+    virtual void makeCurrent();
+    virtual void swapBuffers() const;
+
+    TQPaintDevice* device() const;
+
+    TQColor overlayTransparentColor() const;
+
+    static const TQGLContext* currentContext();
+
+protected:
+    virtual bool chooseContext( const TQGLContext* shareContext = 0 );
+    virtual void doneCurrent(); // ### 4.0: make this public - needed for multithreading stuff
+
+#if defined(Q_WS_WIN)
+    virtual int choosePixelFormat( void* pfd, HDC pdc );
+#endif
+#if defined(Q_WS_X11)
+    virtual void* tryVisual( const TQGLFormat& f, int bufDepth = 1 );
+    virtual void* chooseVisual();
+#endif
+#if defined(Q_WS_MAC)
+    virtual void* chooseMacVisual(GDHandle);
+#endif
+
+    bool deviceIsPixmap() const;
+    bool windowCreated() const;
+    void setWindowCreated( bool on );
+    bool initialized() const;
+    void setInitialized( bool on );
+    void generateFontDisplayLists( const TQFont & fnt, int listBase );
+
+    uint colorIndex( const TQColor& c ) const;
+    void setValid( bool valid );
+    void setDevice( TQPaintDevice *pDev );
+
+protected:
+#if  defined(Q_WS_WIN)
+    HGLRC rc;
+    HDC dc;
+    WId	win;
+    int pixelFormatId;
+    TQGLCmap* cmap;
+#elif defined(Q_WS_X11) || defined(Q_WS_MAC)
+    void* vi;
+    void* cx;
+#if defined(Q_WS_X11)
+    Q_UINT32 gpm;
+#endif
+#endif
+    TQGLFormat glFormat;
+    TQGLFormat reqFormat;
+    static TQGLContext*	currentCtx;
+
+private:
+    void init( TQPaintDevice *dev = 0 );
+    class Private {
+    public:
+	bool valid;
+	bool sharing;
+	bool initDone;
+	bool crWin;
+	TQPaintDevice* paintDevice;
+	TQColor transpColor;
+#ifdef Q_WS_MAC
+	TQRect oldR;
+#endif
+    };
+    Private* d;
+
+    friend class TQGLWidget;
+#ifdef Q_WS_MAC
+    void fixBufferRect();
+#endif
+
+private:	// Disabled copy constructor and operator=
+    TQGLContext() {}
+    TQGLContext( const TQGLContext& ) {}
+    TQGLContext& operator=( const TQGLContext& ) { return *this; }
+};
+
+
+
+
+class TQM_EXPORT_OPENGL TQGLWidget : public TQWidget, public TQGL
+{
+    Q_OBJECT
+public:
+    TQGLWidget( TQWidget* parent=0, const char* name=0,
+	       const TQGLWidget* shareWidget = 0, WFlags f=0 );
+    TQGLWidget( TQGLContext *context, TQWidget* parent, const char* name=0,
+	       const TQGLWidget* shareWidget = 0, WFlags f=0 );
+    TQGLWidget( const TQGLFormat& format, TQWidget* parent=0, const char* name=0,
+	       const TQGLWidget* shareWidget = 0, WFlags f=0 );
+    ~TQGLWidget();
+
+    void qglColor( const TQColor& c ) const;
+    void qglClearColor( const TQColor& c ) const;
+
+    bool isValid() const;
+    bool isSharing() const;
+    virtual void makeCurrent();
+    void doneCurrent();
+    
+    bool doubleBuffer() const;
+    virtual void swapBuffers();
+
+    TQGLFormat format() const;
+#ifndef Q_QDOC
+    virtual void setFormat( const TQGLFormat& format );
+#endif
+
+    const TQGLContext* context() const;
+#ifndef Q_QDOC
+    virtual void setContext( TQGLContext* context,
+			     const TQGLContext* shareContext = 0,
+			     bool deleteOldContext = TRUE );
+#endif
+
+    virtual TQPixmap renderPixmap( int w = 0, int h = 0,
+				  bool useContext = FALSE );
+    virtual TQImage grabFrameBuffer( bool withAlpha = FALSE );
+
+    virtual void makeOverlayCurrent();
+    const TQGLContext* overlayContext() const;
+
+    static TQImage convertToGLFormat( const TQImage& img );
+
+    void setMouseTracking( bool enable );
+    virtual void  reparent( TQWidget* parent, WFlags f, const TQPoint& p,
+			    bool showIt = FALSE );
+
+    const TQGLColormap & colormap() const;
+    void  setColormap( const TQGLColormap & map );
+
+    void renderText( int x, int y, const TQString & str,
+		     const TQFont & fnt = TQFont(), int listBase = 2000 );
+    void renderText( double x, double y, double z, const TQString & str,
+		     const TQFont & fnt = TQFont(), int listBase = 2000 );
+public slots:
+    virtual void updateGL();
+    virtual void updateOverlayGL();
+
+protected:
+    virtual void initializeGL();
+    virtual void resizeGL( int w, int h );
+    virtual void paintGL();
+
+    virtual void initializeOverlayGL();
+    virtual void resizeOverlayGL( int w, int h );
+    virtual void paintOverlayGL();
+
+    void setAutoBufferSwap( bool on );
+    bool autoBufferSwap() const;
+
+    void paintEvent( TQPaintEvent* );
+    void resizeEvent( TQResizeEvent* );
+
+    virtual void glInit();
+    virtual void glDraw();
+
+private:
+    int displayListBase( const TQFont & fnt, int listBase );
+    void cleanupColormaps();
+    void init( TQGLContext *context, const TQGLWidget* shareWidget );
+    bool renderCxPm( TQPixmap* pm );
+    TQGLContext* glcx;
+    bool autoSwap;
+
+    TQGLColormap cmap;
+
+#if defined(Q_WS_WIN) || defined(Q_WS_MAC)
+    TQGLContext* olcx;
+#elif defined(Q_WS_X11)
+    TQGLOverlayWidget*	olw;
+    friend class TQGLOverlayWidget;
+#endif
+
+private:	// Disabled copy constructor and operator=
+#if defined(Q_DISABLE_COPY)
+    TQGLWidget( const TQGLWidget& );
+    TQGLWidget& operator=( const TQGLWidget& );
+#endif
+
+#if defined(Q_WS_MAC)
+private:
+    const TQGLContext *slcx;
+    uint pending_fix : 1,
+	 glcx_dblbuf : 2,
+	 dblbuf : 1,
+	 clp_serial : 15;
+    TQPixmap *gl_pix;
+    TQGLFormat req_format;
+
+    void macInternalRecreateContext( TQGLContext *ctx,
+				     const TQGLContext* = NULL,
+				     bool update = TRUE );
+    bool macInternalDoubleBuffer( bool fix = TRUE );
+    virtual void setRegionDirty( bool );
+    virtual void macWidgetChangedWindow();
+#endif
+private slots:
+    void macInternalFixBufferRect();
+};
+
+
+//
+// TQGLFormat inline functions
+//
+
+inline bool TQGLFormat::doubleBuffer() const
+{
+    return testOption( DoubleBuffer );
+}
+
+inline bool TQGLFormat::depth() const
+{
+    return testOption( DepthBuffer );
+}
+
+inline bool TQGLFormat::rgba() const
+{
+    return testOption( Rgba );
+}
+
+inline bool TQGLFormat::alpha() const
+{
+    return testOption( AlphaChannel );
+}
+
+inline bool TQGLFormat::accum() const
+{
+    return testOption( AccumBuffer );
+}
+
+inline bool TQGLFormat::stencil() const
+{
+    return testOption( StencilBuffer );
+}
+
+inline bool TQGLFormat::stereo() const
+{
+    return testOption( StereoBuffers );
+}
+
+inline bool TQGLFormat::directRendering() const
+{
+    return testOption( DirectRendering );
+}
+
+inline bool TQGLFormat::hasOverlay() const
+{
+    return testOption( HasOverlay );
+}
+
+//
+// TQGLContext inline functions
+//
+
+inline bool TQGLContext::isValid() const
+{
+    return d->valid;
+}
+
+inline void TQGLContext::setValid( bool valid )
+{
+    d->valid = valid;
+}
+
+inline bool TQGLContext::isSharing() const
+{
+    return d->sharing;
+}
+
+inline TQGLFormat TQGLContext::format() const
+{
+    return glFormat;
+}
+
+inline TQGLFormat TQGLContext::requestedFormat() const
+{
+    return reqFormat;
+}
+
+inline TQPaintDevice* TQGLContext::device() const
+{
+    return d->paintDevice;
+}
+
+inline bool TQGLContext::deviceIsPixmap() const
+{
+    return d->paintDevice->devType() == TQInternal::Pixmap;
+}
+
+
+inline bool TQGLContext::windowCreated() const
+{
+    return d->crWin;
+}
+
+
+inline void TQGLContext::setWindowCreated( bool on )
+{
+    d->crWin = on;
+}
+
+inline bool TQGLContext::initialized() const
+{
+    return d->initDone;
+}
+
+inline void TQGLContext::setInitialized( bool on )
+{
+    d->initDone = on;
+}
+
+inline const TQGLContext* TQGLContext::currentContext()
+{
+    return currentCtx;
+}
+
+//
+// TQGLWidget inline functions
+//
+
+inline TQGLFormat TQGLWidget::format() const
+{
+    return glcx->format();
+}
+
+inline const TQGLContext *TQGLWidget::context() const
+{
+    return glcx;
+}
+
+inline bool TQGLWidget::doubleBuffer() const
+{
+    return glcx->format().doubleBuffer();
+}
+
+inline void TQGLWidget::setAutoBufferSwap( bool on )
+{
+    autoSwap = on;
+}
+
+inline bool TQGLWidget::autoBufferSwap() const
+{
+    return autoSwap;
+}
+
+#endif
diff --git a/src/opengl/qgl_x11.cpp b/src/opengl/qgl_x11.cpp
new file mode 100644
index 000000000..9e58d5244
--- /dev/null
+++ b/src/opengl/qgl_x11.cpp
@@ -0,0 +1,1406 @@
+/****************************************************************************
+**
+** Implementation of OpenGL classes for TQt
+**
+** Created : 970112
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the opengl module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file.  Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "qgl.h"
+
+#if defined(Q_WS_X11)
+
+#include "qmap.h"
+#include "qpixmap.h"
+#include "qapplication.h"
+
+#include "qintdict.h"
+#include "private/qfontengine_p.h"
+
+#define INT8  dummy_INT8
+#define INT32 dummy_INT32
+#include <GL/glx.h>
+#undef  INT8
+#undef  INT32
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xos.h>
+#include <X11/Xatom.h>
+
+// POSIX Large File Support redefines truncate -> truncate64
+#if defined(truncate)
+# undef truncate
+#endif
+
+#ifndef QT_DLOPEN_OPENGL
+extern "C" {
+    Status XmuLookupStandardColormap( Display *dpy, int screen, VisualID visualid,
+				      unsigned int depth, Atom property,
+				      Bool replace, Bool retain );
+}
+#endif
+
+#include "qgl_x11_p.h"
+#ifdef QT_DLOPEN_OPENGL
+#include "qlibrary.h"
+
+extern "C" {
+_glCallLists qt_glCallLists;
+_glClearColor qt_glClearColor;
+_glClearIndex qt_glClearIndex;
+_glColor3ub qt_glColor3ub;
+_glDeleteLists qt_glDeleteLists;
+_glDrawBuffer qt_glDrawBuffer;
+_glFlush qt_glFlush;
+_glIndexi qt_glIndexi;
+_glListBase qt_glListBase;
+_glLoadIdentity qt_glLoadIdentity;
+_glMatrixMode qt_glMatrixMode;
+_glOrtho qt_glOrtho;
+_glPopAttrib qt_glPopAttrib;
+_glPopMatrix qt_glPopMatrix;
+_glPushAttrib qt_glPushAttrib;
+_glPushMatrix qt_glPushMatrix;
+_glRasterPos2i qt_glRasterPos2i;
+_glRasterPos3d qt_glRasterPos3d;
+_glReadPixels qt_glReadPixels;
+_glViewport qt_glViewport;
+_glPixelStorei qt_glPixelStorei;
+_glBitmap qt_glBitmap;
+_glDrawPixels qt_glDrawPixels;
+_glNewList qt_glNewList;
+_glGetFloatv qt_glGetFloatv;
+_glGetIntegerv qt_glGetIntegerv;
+_glEndList qt_glEndList;
+
+_glXChooseVisual qt_glXChooseVisual;
+_glXCreateContext qt_glXCreateContext;
+_glXCreateGLXPixmap qt_glXCreateGLXPixmap;
+_glXDestroyContext qt_glXDestroyContext;
+_glXDestroyGLXPixmap qt_glXDestroyGLXPixmap;
+_glXGetClientString qt_glXGetClientString;
+_glXGetConfig qt_glXGetConfig;
+_glXIsDirect qt_glXIsDirect;
+_glXMakeCurrent qt_glXMakeCurrent;
+_glXQueryExtension qt_glXQueryExtension;
+_glXQueryExtensionsString qt_glXQueryExtensionsString;
+_glXQueryServerString qt_glXQueryServerString;
+_glXSwapBuffers qt_glXSwapBuffers;
+_glXUseXFont qt_glXUseXFont;
+_glXWaitX qt_glXWaitX;
+};
+
+bool qt_resolve_gl_symbols(bool fatal)
+{
+    static bool gl_syms_resolved = FALSE;
+    if (gl_syms_resolved)
+	return TRUE;
+
+    TQLibrary gl("GL.so.1");
+    gl.setAutoUnload(FALSE);
+
+    qt_glCallLists = (_glCallLists) gl.resolve("glCallLists");
+
+    if (!qt_glCallLists) { // if this fails the rest will surely fail
+	if (fatal)
+	    qFatal("Unable to resolve GL/GLX symbols - please check your GL library installation.");
+	return FALSE;
+    }
+
+    qt_glClearColor = (_glClearColor) gl.resolve("glClearColor");
+    qt_glClearIndex = (_glClearIndex) gl.resolve("glClearIndex");
+    qt_glColor3ub = (_glColor3ub) gl.resolve("glColor3ub");
+    qt_glDeleteLists = (_glDeleteLists) gl.resolve("glDeleteLists");
+    qt_glDrawBuffer = (_glDrawBuffer) gl.resolve("glDrawBuffer");
+    qt_glFlush = (_glFlush) gl.resolve("glFlush");
+    qt_glIndexi = (_glIndexi) gl.resolve("glIndexi");
+    qt_glListBase = (_glListBase) gl.resolve("glListBase");
+    qt_glLoadIdentity = (_glLoadIdentity) gl.resolve("glLoadIdentity");
+    qt_glMatrixMode = (_glMatrixMode) gl.resolve("glMatrixMode");
+    qt_glOrtho = (_glOrtho) gl.resolve("glOrtho");
+    qt_glPopAttrib = (_glPopAttrib) gl.resolve("glPopAttrib");
+    qt_glPopMatrix = (_glPopMatrix) gl.resolve("glPopMatrix");
+    qt_glPushAttrib = (_glPushAttrib) gl.resolve("glPushAttrib");
+    qt_glPushMatrix = (_glPushMatrix) gl.resolve("glPushMatrix");
+    qt_glRasterPos2i = (_glRasterPos2i) gl.resolve("glRasterPos2i");
+    qt_glRasterPos3d = (_glRasterPos3d) gl.resolve("glRasterPos3d");
+    qt_glReadPixels = (_glReadPixels) gl.resolve("glReadPixels");
+    qt_glViewport = (_glViewport) gl.resolve("glViewport");
+    qt_glPixelStorei = (_glPixelStorei) gl.resolve("glPixelStorei");
+    qt_glBitmap = (_glBitmap) gl.resolve("glBitmap");
+    qt_glDrawPixels = (_glDrawPixels) gl.resolve("glDrawPixels");
+    qt_glNewList = (_glNewList) gl.resolve("glNewList");
+    qt_glGetFloatv = (_glGetFloatv) gl.resolve("glGetFloatv");
+    qt_glGetIntegerv = (_glGetIntegerv) gl.resolve("glGetIntegerv");
+    qt_glEndList = (_glEndList) gl.resolve("glEndList");
+
+    qt_glXChooseVisual = (_glXChooseVisual) gl.resolve("glXChooseVisual");
+    qt_glXCreateContext = (_glXCreateContext) gl.resolve("glXCreateContext");
+    qt_glXCreateGLXPixmap = (_glXCreateGLXPixmap) gl.resolve("glXCreateGLXPixmap");
+    qt_glXDestroyContext = (_glXDestroyContext) gl.resolve("glXDestroyContext");
+    qt_glXDestroyGLXPixmap = (_glXDestroyGLXPixmap) gl.resolve("glXDestroyGLXPixmap");
+    qt_glXGetClientString = (_glXGetClientString) gl.resolve("glXGetClientString");
+    qt_glXGetConfig = (_glXGetConfig) gl.resolve("glXGetConfig");
+    qt_glXIsDirect = (_glXIsDirect) gl.resolve("glXIsDirect");
+    qt_glXMakeCurrent = (_glXMakeCurrent) gl.resolve("glXMakeCurrent");
+    qt_glXQueryExtension = (_glXQueryExtension) gl.resolve("glXQueryExtension");
+    qt_glXQueryExtensionsString = (_glXQueryExtensionsString) gl.resolve("glXQueryExtensionsString");
+    qt_glXQueryServerString = (_glXQueryServerString) gl.resolve("glXQueryServerString");
+    qt_glXSwapBuffers = (_glXSwapBuffers) gl.resolve("glXSwapBuffers");
+    qt_glXUseXFont = (_glXUseXFont) gl.resolve("glXUseXFont");
+    qt_glXWaitX = (_glXWaitX) gl.resolve("glXWaitX");
+    gl_syms_resolved = TRUE;
+    return TRUE;
+}
+#endif // QT_DLOPEN_OPENGL
+
+
+/*
+  The choose_cmap function is internal and used by TQGLWidget::setContext()
+  and GLX (not Windows).  If the application can't find any sharable
+  colormaps, it must at least create as few colormaps as possible.  The
+  dictionary solution below ensures only one colormap is created per visual.
+  Colormaps are also deleted when the application terminates.
+*/
+
+struct CMapEntry {
+    CMapEntry();
+   ~CMapEntry();
+    Colormap		cmap;
+    bool		alloc;
+    XStandardColormap	scmap;
+};
+
+CMapEntry::CMapEntry()
+{
+    cmap = 0;
+    alloc = FALSE;
+    scmap.colormap = 0;
+}
+
+CMapEntry::~CMapEntry()
+{
+    if ( alloc )
+	XFreeColormap( TQPaintDevice::x11AppDisplay(), cmap );
+}
+
+static TQIntDict<CMapEntry> *cmap_dict = 0;
+static bool		    mesa_gl   = FALSE;
+static TQIntDict< TQMap<int, TQRgb> > *qglcmap_dict = 0;
+
+static void cleanup_cmaps()
+{
+    if (cmap_dict) {
+	cmap_dict->setAutoDelete(TRUE);
+	delete cmap_dict;
+	cmap_dict = 0;
+    }
+    if (qglcmap_dict) {
+	qglcmap_dict->setAutoDelete(TRUE);
+	delete qglcmap_dict;
+	qglcmap_dict = 0;
+    }
+}
+
+static Colormap choose_cmap( Display *dpy, XVisualInfo *vi )
+{
+    if ( !cmap_dict ) {
+	cmap_dict = new TQIntDict<CMapEntry>;
+	const char *v = glXQueryServerString( dpy, vi->screen, GLX_VERSION );
+	if ( v )
+	    mesa_gl = strstr(v,"Mesa") != 0;
+	qAddPostRoutine( cleanup_cmaps );
+    }
+
+    CMapEntry *x = cmap_dict->find( (long) vi->visualid + ( vi->screen * 256 ) );
+    if ( x )					// found colormap for visual
+	return x->cmap;
+
+    x = new CMapEntry();
+
+    XStandardColormap *c;
+    int n, i;
+
+    // qDebug( "Choosing cmap for vID %0x", vi->visualid );
+
+    if ( vi->visualid ==
+	 XVisualIDFromVisual( (Visual*)TQPaintDevice::x11AppVisual( vi->screen ) ) ) {
+	// qDebug( "Using x11AppColormap" );
+	return TQPaintDevice::x11AppColormap( vi->screen );
+    }
+
+    if ( mesa_gl ) {				// we're using MesaGL
+	Atom hp_cmaps = XInternAtom( dpy, "_HP_RGB_SMOOTH_MAP_LIST", TRUE );
+	if ( hp_cmaps && vi->visual->c_class == TrueColor && vi->depth == 8 ) {
+	    if ( XGetRGBColormaps(dpy,RootWindow(dpy,vi->screen),&c,&n,
+				  hp_cmaps) ) {
+		i = 0;
+		while ( i < n && x->cmap == 0 ) {
+		    if ( c[i].visualid == vi->visual->visualid ) {
+			x->cmap = c[i].colormap;
+			x->scmap = c[i];
+			//qDebug( "Using HP_RGB scmap" );
+
+		    }
+		    i++;
+		}
+		XFree( (char *)c );
+	    }
+	}
+    }
+#if !defined(Q_OS_SOLARIS)
+    if ( !x->cmap ) {
+#ifdef QT_DLOPEN_OPENGL
+	typedef Status (*_XmuLookupStandardColormap)( Display *dpy, int screen, VisualID visualid, unsigned int depth,
+						      Atom property, Bool replace, Bool retain );
+	_XmuLookupStandardColormap qt_XmuLookupStandardColormap;
+	qt_XmuLookupStandardColormap = (_XmuLookupStandardColormap) TQLibrary::resolve("Xmu.so.6", "XmuLookupStandardColormap");
+	if (!qt_XmuLookupStandardColormap)
+	    qFatal("Unable to resolve Xmu symbols - please check your Xmu library installation.");
+#define XmuLookupStandardColormap qt_XmuLookupStandardColormap
+
+#endif
+
+	if ( XmuLookupStandardColormap(dpy,vi->screen,vi->visualid,vi->depth,
+					  XA_RGB_DEFAULT_MAP,FALSE,TRUE) ) {
+	    if ( XGetRGBColormaps(dpy,RootWindow(dpy,vi->screen),&c,&n,
+				  XA_RGB_DEFAULT_MAP) ) {
+		i = 0;
+		while ( i < n && x->cmap == 0 ) {
+		    if ( c[i].visualid == vi->visualid ) {
+			x->cmap = c[i].colormap;
+			x->scmap = c[i];
+			//qDebug( "Using RGB_DEFAULT scmap" );
+		    }
+		    i++;
+		}
+		XFree( (char *)c );
+	    }
+	}
+    }
+#endif
+    if ( !x->cmap ) {				// no shared cmap found
+	x->cmap = XCreateColormap( dpy, RootWindow(dpy,vi->screen), vi->visual,
+				   AllocNone );
+	x->alloc = TRUE;
+	// qDebug( "Allocating cmap" );
+    }
+
+    // associate cmap with visualid
+    cmap_dict->insert( (long) vi->visualid + ( vi->screen * 256 ), x );
+    return x->cmap;
+}
+
+struct TransColor
+{
+    VisualID	vis;
+    int		screen;
+    long	color;
+};
+
+static TQMemArray<TransColor> trans_colors;
+static int trans_colors_init = FALSE;
+
+
+static void find_trans_colors()
+{
+    struct OverlayProp {
+	long  visual;
+	long  type;
+	long  value;
+	long  layer;
+    };
+
+    trans_colors_init = TRUE;
+
+    Display* appDisplay = TQPaintDevice::x11AppDisplay();
+
+    int scr;
+    int lastsize = 0;
+    for ( scr = 0; scr < ScreenCount( appDisplay ); scr++ ) {
+	TQWidget* rootWin = TQApplication::desktop()->screen( scr );
+	if ( !rootWin )
+	    return;					// Should not happen
+	Atom overlayVisualsAtom = XInternAtom( appDisplay,
+					       "SERVER_OVERLAY_VISUALS", True );
+	if ( overlayVisualsAtom == None )
+	    return;					// Server has no overlays
+
+	Atom actualType;
+	int actualFormat;
+	ulong nItems;
+	ulong bytesAfter;
+	OverlayProp* overlayProps = 0;
+	int res = XGetWindowProperty( appDisplay, rootWin->winId(),
+				      overlayVisualsAtom, 0, 10000, False,
+				      overlayVisualsAtom, &actualType,
+				      &actualFormat, &nItems, &bytesAfter,
+				      (uchar**)&overlayProps );
+
+	if ( res != Success || actualType != overlayVisualsAtom
+	     || actualFormat != 32 || nItems < 4 || !overlayProps )
+	    return;					// Error reading property
+
+	int numProps = nItems / 4;
+	trans_colors.resize( lastsize + numProps );
+	int j = lastsize;
+	for ( int i = 0; i < numProps; i++ ) {
+	    if ( overlayProps[i].type == 1 ) {
+		trans_colors[j].vis = (VisualID)overlayProps[i].visual;
+		trans_colors[j].screen = scr;
+		trans_colors[j].color = (int)overlayProps[i].value;
+		j++;
+	    }
+	}
+	XFree( overlayProps );
+	lastsize = j;
+	trans_colors.truncate( lastsize );
+    }
+}
+
+
+/*****************************************************************************
+  TQGLFormat UNIX/GLX-specific code
+ *****************************************************************************/
+
+bool TQGLFormat::hasOpenGL()
+{
+    if (!qt_resolve_gl_symbols(FALSE))
+	return FALSE;
+    return glXQueryExtension(qt_xdisplay(),0,0) != 0;
+}
+
+
+bool TQGLFormat::hasOpenGLOverlays()
+{
+    qt_resolve_gl_symbols();
+    if ( !trans_colors_init )
+	find_trans_colors();
+    return trans_colors.size() > 0;
+}
+
+
+
+/*****************************************************************************
+  TQGLContext UNIX/GLX-specific code
+ *****************************************************************************/
+
+bool TQGLContext::chooseContext( const TQGLContext* shareContext )
+{
+    Display* disp = d->paintDevice->x11Display();
+    vi = chooseVisual();
+    if ( !vi )
+	return FALSE;
+
+    if ( deviceIsPixmap() &&
+	 (((XVisualInfo*)vi)->depth != d->paintDevice->x11Depth() ||
+	  ((XVisualInfo*)vi)->screen != d->paintDevice->x11Screen()) )
+    {
+	XFree( vi );
+	XVisualInfo appVisInfo;
+	memset( &appVisInfo, 0, sizeof(XVisualInfo) );
+	appVisInfo.visualid = XVisualIDFromVisual( (Visual*)d->paintDevice->x11Visual() );
+	appVisInfo.screen = d->paintDevice->x11Screen();
+	int nvis;
+	vi = XGetVisualInfo( disp, VisualIDMask | VisualScreenMask, &appVisInfo, &nvis );
+	if ( !vi )
+	    return FALSE;
+
+	int useGL;
+	glXGetConfig( disp, (XVisualInfo*)vi, GLX_USE_GL, &useGL );
+	if ( !useGL )
+	    return FALSE;	//# Chickening out already...
+    }
+    int res;
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_LEVEL, &res );
+    glFormat.setPlane( res );
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_DOUBLEBUFFER, &res );
+    glFormat.setDoubleBuffer( res );
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_DEPTH_SIZE, &res );
+    glFormat.setDepth( res );
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_RGBA, &res );
+    glFormat.setRgba( res );
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_ALPHA_SIZE, &res );
+    glFormat.setAlpha( res );
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_ACCUM_RED_SIZE, &res );
+    glFormat.setAccum( res );
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_STENCIL_SIZE, &res );
+    glFormat.setStencil( res );
+    glXGetConfig( disp, (XVisualInfo*)vi, GLX_STEREO, &res );
+    glFormat.setStereo( res );
+
+    Bool direct = format().directRendering() ? True : False;
+
+    if ( shareContext &&
+	 ( !shareContext->isValid() || !shareContext->cx ) ) {
+#if defined(QT_CHECK_NULL)
+	    qWarning("TQGLContext::chooseContext(): Cannot share with invalid context");
+#endif
+	    shareContext = 0;
+    }
+
+    // 1. Sharing between rgba and color-index will give wrong colors.
+    // 2. Contexts cannot be shared btw. direct/non-direct renderers.
+    // 3. Pixmaps cannot share contexts that are set up for direct rendering.
+    if ( shareContext && (format().rgba() != shareContext->format().rgba() ||
+			  (deviceIsPixmap() &&
+			   glXIsDirect( disp, (GLXContext)shareContext->cx ))))
+	shareContext = 0;
+
+    cx = 0;
+    if ( shareContext ) {
+	cx = glXCreateContext( disp, (XVisualInfo *)vi,
+			       (GLXContext)shareContext->cx, direct );
+	if ( cx )
+	    d->sharing = TRUE;
+    }
+    if ( !cx )
+	cx = glXCreateContext( disp, (XVisualInfo *)vi, None, direct );
+    if ( !cx )
+	return FALSE;
+    glFormat.setDirectRendering( glXIsDirect( disp, (GLXContext)cx ) );
+    if ( deviceIsPixmap() ) {
+#if defined(GLX_MESA_pixmap_colormap) && defined(TQGL_USE_MESA_EXT)
+	gpm = glXCreateGLXPixmapMESA( disp, (XVisualInfo *)vi,
+				      d->paintDevice->handle(),
+				      choose_cmap( disp, (XVisualInfo *)vi ) );
+#else
+	gpm = (Q_UINT32)glXCreateGLXPixmap( disp, (XVisualInfo *)vi,
+					    d->paintDevice->handle() );
+#endif
+	if ( !gpm )
+	    return FALSE;
+    }
+    return TRUE;
+}
+
+
+/*!
+  <strong>X11 only</strong>: This virtual function tries to find a
+  visual that matches the format, reducing the demands if the original
+  request cannot be met.
+
+  The algorithm for reducing the demands of the format is tquite
+  simple-minded, so override this method in your subclass if your
+  application has spcific retquirements on visual selection.
+
+  \sa chooseContext()
+*/
+
+void *TQGLContext::chooseVisual()
+{
+    static int bufDepths[] = { 8, 4, 2, 1 };	// Try 16, 12 also?
+    //todo: if pixmap, also make sure that vi->depth == pixmap->depth
+    void* vis = 0;
+    int i = 0;
+    bool fail = FALSE;
+    TQGLFormat fmt = format();
+    bool tryDouble = !fmt.doubleBuffer();  // Some GL impl's only have double
+    bool triedDouble = FALSE;
+    while( !fail && !( vis = tryVisual( fmt, bufDepths[i] ) ) ) {
+	if ( !fmt.rgba() && bufDepths[i] > 1 ) {
+	    i++;
+	    continue;
+	}
+	if ( tryDouble ) {
+	    fmt.setDoubleBuffer( TRUE );
+	    tryDouble = FALSE;
+	    triedDouble = TRUE;
+	    continue;
+	}
+	else if ( triedDouble ) {
+	    fmt.setDoubleBuffer( FALSE );
+	    triedDouble = FALSE;
+	}
+	if ( fmt.stereo() ) {
+	    fmt.setStereo( FALSE );
+	    continue;
+	}
+	if ( fmt.accum() ) {
+	    fmt.setAccum( FALSE );
+	    continue;
+	}
+	if ( fmt.stencil() ) {
+	    fmt.setStencil( FALSE );
+	    continue;
+	}
+	if ( fmt.alpha() ) {
+	    fmt.setAlpha( FALSE );
+	    continue;
+	}
+	if ( fmt.depth() ) {
+	    fmt.setDepth( FALSE );
+	    continue;
+	}
+	if ( fmt.doubleBuffer() ) {
+	    fmt.setDoubleBuffer( FALSE );
+	    continue;
+	}
+	fail = TRUE;
+    }
+    glFormat = fmt;
+    return vis;
+}
+
+
+/*!
+
+  \internal
+
+  <strong>X11 only</strong>: This virtual function chooses a visual
+  that matches the OpenGL \link format() format\endlink. Reimplement this
+  function in a subclass if you need a custom visual.
+
+  \sa chooseContext()
+*/
+
+void *TQGLContext::tryVisual( const TQGLFormat& f, int bufDepth )
+{
+    int spec[40];
+    int i = 0;
+    spec[i++] = GLX_LEVEL;
+    spec[i++] = f.plane();
+
+#if defined(GLX_VERSION_1_1) && defined(GLX_EXT_visual_info)
+    static bool useTranspExt = FALSE;
+    static bool useTranspExtChecked = FALSE;
+    if ( f.plane() && !useTranspExtChecked && d->paintDevice ) {
+	TQCString estr( glXQueryExtensionsString( d->paintDevice->x11Display(),
+						 d->paintDevice->x11Screen() ) );
+	useTranspExt = estr.contains( "GLX_EXT_visual_info" );
+	//# (A bit simplistic; that could theoretically be a substring)
+	if ( useTranspExt ) {
+	    TQCString cstr( glXGetClientString( d->paintDevice->x11Display(),
+					       GLX_VENDOR ) );
+	    useTranspExt = !cstr.contains( "Xi Graphics" ); // bug workaround
+	    if ( useTranspExt ) {
+		// bug workaround - some systems (eg. FireGL) refuses to return an overlay
+		// visual if the GLX_TRANSPARENT_TYPE_EXT attribute is specfied, even if
+		// the implementation supports transparent overlays
+		int tmpSpec[] = { GLX_LEVEL, f.plane(), GLX_TRANSPARENT_TYPE_EXT,
+				  f.rgba() ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT,
+				  None };
+		XVisualInfo * vinf = glXChooseVisual( d->paintDevice->x11Display(),
+						      d->paintDevice->x11Screen(), tmpSpec );
+		if ( !vinf ) {
+		    useTranspExt = FALSE;
+		}
+	    }
+	}
+
+	useTranspExtChecked = TRUE;
+    }
+    if ( f.plane() && useTranspExt ) {
+	// Retquired to avoid non-transparent overlay visual(!) on some systems
+	spec[i++] = GLX_TRANSPARENT_TYPE_EXT;
+	spec[i++] = f.rgba() ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT;
+    }
+#endif
+
+    if ( f.doubleBuffer() )
+	spec[i++] = GLX_DOUBLEBUFFER;
+    if ( f.depth() ) {
+	spec[i++] = GLX_DEPTH_SIZE;
+	spec[i++] = 1;
+    }
+    if ( f.stereo() ) {
+	spec[i++] = GLX_STEREO;
+    }
+    if ( f.stencil() ) {
+	spec[i++] = GLX_STENCIL_SIZE;
+	spec[i++] = 1;
+    }
+    if ( f.rgba() ) {
+	spec[i++] = GLX_RGBA;
+	spec[i++] = GLX_RED_SIZE;
+	spec[i++] = 1;
+	spec[i++] = GLX_GREEN_SIZE;
+	spec[i++] = 1;
+	spec[i++] = GLX_BLUE_SIZE;
+	spec[i++] = 1;
+	if ( f.alpha() ) {
+	    spec[i++] = GLX_ALPHA_SIZE;
+	    spec[i++] = 1;
+	}
+	if ( f.accum() ) {
+	    spec[i++] = GLX_ACCUM_RED_SIZE;
+	    spec[i++] = 1;
+	    spec[i++] = GLX_ACCUM_GREEN_SIZE;
+	    spec[i++] = 1;
+	    spec[i++] = GLX_ACCUM_BLUE_SIZE;
+	    spec[i++] = 1;
+	    if ( f.alpha() ) {
+		spec[i++] = GLX_ACCUM_ALPHA_SIZE;
+		spec[i++] = 1;
+	    }
+	}
+    }
+    else {
+	spec[i++] = GLX_BUFFER_SIZE;
+	spec[i++] = bufDepth;
+    }
+
+    spec[i] = None;
+    return glXChooseVisual( d->paintDevice->x11Display(),
+			    d->paintDevice->x11Screen(), spec );
+}
+
+
+void TQGLContext::reset()
+{
+    if ( !d->valid )
+	return;
+    doneCurrent();
+    if ( gpm )
+	glXDestroyGLXPixmap( d->paintDevice->x11Display(), (GLXPixmap)gpm );
+    gpm = 0;
+    glXDestroyContext( d->paintDevice->x11Display(), (GLXContext)cx );
+    if ( vi )
+	XFree( vi );
+    vi = 0;
+    cx = 0;
+    d->crWin = FALSE;
+    d->sharing = FALSE;
+    d->valid = FALSE;
+    d->transpColor = TQColor();
+    d->initDone = FALSE;
+}
+
+
+void TQGLContext::makeCurrent()
+{
+    if ( !d->valid ) {
+#if defined(QT_CHECK_STATE)
+	qWarning("TQGLContext::makeCurrent(): Cannot make invalid context current.");
+#endif
+	return;
+    }
+    bool ok = TRUE;
+    if ( deviceIsPixmap() )
+	ok = glXMakeCurrent( d->paintDevice->x11Display(),
+			     (GLXPixmap)gpm,
+			     (GLXContext)cx );
+
+    else
+	ok = glXMakeCurrent( d->paintDevice->x11Display(),
+			     ((TQWidget *)d->paintDevice)->winId(),
+			     (GLXContext)cx );
+#if defined(QT_CHECK_NULL)
+    //    qDebug("makeCurrent: %i, vi=%i, vi->vi=%i, vi->id=%i", (int)this, (int)vi, (int)((XVisualInfo*)vi)->visual, (int)((XVisualInfo*)vi)->visualid );
+    if ( !ok )
+	qWarning("TQGLContext::makeCurrent(): Failed.");
+#endif
+    if ( ok )
+	currentCtx = this;
+}
+
+void TQGLContext::doneCurrent()
+{
+    glXMakeCurrent( d->paintDevice->x11Display(), 0, 0 );
+    currentCtx = 0;
+}
+
+
+void TQGLContext::swapBuffers() const
+{
+    if ( !d->valid )
+	return;
+    if ( !deviceIsPixmap() )
+	glXSwapBuffers( d->paintDevice->x11Display(),
+			((TQWidget *)d->paintDevice)->winId() );
+}
+
+TQColor TQGLContext::overlayTransparentColor() const
+{
+    //### make more efficient using the transpColor member
+    if ( isValid() ) {
+	if ( !trans_colors_init )
+	    find_trans_colors();
+
+	VisualID myVisualId = ((XVisualInfo*)vi)->visualid;
+	int myScreen = ((XVisualInfo*)vi)->screen;
+	for ( int i = 0; i < (int)trans_colors.size(); i++ ) {
+	    if ( trans_colors[i].vis == myVisualId &&
+		 trans_colors[i].screen == myScreen ) {
+		XColor col;
+		col.pixel = trans_colors[i].color;
+		col.red = col.green = col.blue = 0;
+		col.flags = 0;
+		Display *dpy = d->paintDevice->x11Display();
+		if (col.pixel > (uint) ((XVisualInfo *)vi)->colormap_size - 1)
+		    col.pixel = ((XVisualInfo *)vi)->colormap_size - 1;
+		XQueryColor(dpy, choose_cmap(dpy, (XVisualInfo *) vi), &col);
+		uchar r = (uchar)((col.red / 65535.0) * 255.0 + 0.5);
+		uchar g = (uchar)((col.green / 65535.0) * 255.0 + 0.5);
+		uchar b = (uchar)((col.blue / 65535.0) * 255.0 + 0.5);
+		return TQColor(qRgb(r,g,b), trans_colors[i].color);
+	    }
+	}
+    }
+    return TQColor();		// Invalid color
+}
+
+
+uint TQGLContext::colorIndex( const TQColor& c ) const
+{
+    int screen = ((XVisualInfo *)vi)->screen;
+    if ( isValid() ) {
+	if ( format().plane()
+	     && c.pixel( screen ) == overlayTransparentColor().pixel( screen ) )
+	    return c.pixel( screen );		// Special; don't look-up
+	if ( ((XVisualInfo*)vi)->visualid ==
+	     XVisualIDFromVisual( (Visual*)TQPaintDevice::x11AppVisual( screen ) ) )
+	    return c.pixel( screen );		// We're using TQColor's cmap
+
+	XVisualInfo *info = (XVisualInfo *) vi;
+	CMapEntry *x = cmap_dict->find( (long) info->visualid + ( info->screen * 256 ) );
+	if ( x && !x->alloc) {		// It's a standard colormap
+	    int rf = (int)(((float)c.red() * (x->scmap.red_max+1))/256.0);
+	    int gf = (int)(((float)c.green() * (x->scmap.green_max+1))/256.0);
+	    int bf = (int)(((float)c.blue() * (x->scmap.blue_max+1))/256.0);
+	    uint p = x->scmap.base_pixel
+		     + ( rf * x->scmap.red_mult )
+		     + ( gf * x->scmap.green_mult )
+		     + ( bf * x->scmap.blue_mult );
+	    return p;
+	} else {
+	    if (!qglcmap_dict) {
+		qglcmap_dict = new TQIntDict< TQMap<int, TQRgb> >;
+	    }
+	    TQMap<int, TQRgb> *cmap;
+	    if ((cmap = qglcmap_dict->find((long) info->visualid)) == 0) {
+		cmap = new TQMap<int, TQRgb>;
+		qglcmap_dict->insert((long) info->visualid, cmap);
+	    }
+
+	    // already in the map?
+	    TQRgb target = c.rgb();
+	    TQMap<int, TQRgb>::Iterator it = cmap->begin();
+	    for (; it != cmap->end(); ++it) {
+		if ((*it) == target)
+		    return it.key();
+	    }
+
+	    // need to alloc color
+	    unsigned long plane_mask[2];
+	    unsigned long color_map_entry;
+	    if (!XAllocColorCells (TQPaintDevice::x11AppDisplay(), x->cmap, TRUE, plane_mask, 0,
+				   &color_map_entry, 1))
+		return c.pixel(screen);
+
+	    XColor col;
+	    col.flags = DoRed | DoGreen | DoBlue;
+	    col.pixel = color_map_entry;
+	    col.red   = (ushort)((qRed(c.rgb()) / 255.0) * 65535.0 + 0.5);
+	    col.green = (ushort)((qGreen(c.rgb()) / 255.0) * 65535.0 + 0.5);
+	    col.blue  = (ushort)((qBlue(c.rgb()) / 255.0) * 65535.0 + 0.5);
+	    XStoreColor(TQPaintDevice::x11AppDisplay(), x->cmap, &col);
+
+	    cmap->insert(color_map_entry, target);
+	    return color_map_entry;
+	}
+    }
+    return 0;
+}
+
+#ifndef QT_NO_XFTFREETYPE
+/*! \internal
+    This is basically a substitute for glxUseXFont() which can only
+    handle XLFD fonts. This version relies on XFT v2 to render the
+    glyphs, but it works with all fonts that XFT2 provides - both
+    antialiased and aliased bitmap and outline fonts.
+*/
+void qgl_use_font(TQFontEngineXft *engine, int first, int count, int listBase)
+{
+    GLfloat color[4];
+    glGetFloatv(GL_CURRENT_COLOR, color);
+
+    // save the pixel unpack state
+    GLint gl_swapbytes, gl_lsbfirst, gl_rowlength, gl_skiprows, gl_skippixels, gl_alignment;
+    glGetIntegerv (GL_UNPACK_SWAP_BYTES, &gl_swapbytes);
+    glGetIntegerv (GL_UNPACK_LSB_FIRST, &gl_lsbfirst);
+    glGetIntegerv (GL_UNPACK_ROW_LENGTH, &gl_rowlength);
+    glGetIntegerv (GL_UNPACK_SKIP_ROWS, &gl_skiprows);
+    glGetIntegerv (GL_UNPACK_SKIP_PIXELS, &gl_skippixels);
+    glGetIntegerv (GL_UNPACK_ALIGNMENT, &gl_alignment);
+
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
+    glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+    Bool antialiased = False;
+#if 0 // disable antialias support for now
+    XftPatternGetBool(engine->pattern(), XFT_ANTIALIAS, 0, &antialiased);
+#endif
+#ifdef QT_XFT2
+    FT_Face face = XftLockFace(engine->font());
+#else
+    FT_Face face = engine->face();
+#endif
+    // start generating font glyphs
+    for (int i = first; i < count; ++i) {
+	int list = listBase + i;
+	GLfloat x0, y0, dx, dy;
+
+	FT_Error err;
+
+	err = FT_Load_Glyph(face, FT_Get_Char_Index(face, i), FT_LOAD_DEFAULT);
+	if (err) {
+	    qDebug("failed loading glyph %d from font", i);
+	    Q_ASSERT(!err);
+	}
+	err = FT_Render_Glyph(face->glyph, (antialiased ? ft_render_mode_normal
+					    : ft_render_mode_mono));
+	if (err) {
+	    qDebug("failed rendering glyph %d from font", i);
+	    Q_ASSERT(!err);
+	}
+
+	FT_Bitmap bm = face->glyph->bitmap;
+	x0 = face->glyph->metrics.horiBearingX >> 6;
+	y0 = (face->glyph->metrics.height - face->glyph->metrics.horiBearingY) >> 6;
+	dx = face->glyph->metrics.horiAdvance >> 6;
+	dy = 0;
+ 	int sz = bm.pitch * bm.rows;
+	uint *aa_glyph = 0;
+	uchar *ua_glyph = 0;
+
+	if (antialiased)
+	    aa_glyph = new uint[sz];
+	else
+	    ua_glyph = new uchar[sz];
+
+	// convert to GL format
+	for (int y = 0; y < bm.rows; ++y) {
+	    for (int x = 0; x < bm.pitch; ++x) {
+		int c1 = y*bm.pitch + x;
+		int c2 = (bm.rows - y - 1) > 0 ? (bm.rows-y-1)*bm.pitch + x : x;
+		if (antialiased) {
+		    aa_glyph[c1] = (int(color[0]*255) << 24)
+					 | (int(color[1]*255) << 16)
+					 | (int(color[2]*255) << 8) | bm.buffer[c2];
+		} else {
+		    ua_glyph[c1] = bm.buffer[c2];
+		}
+	    }
+	}
+
+	glNewList(list, GL_COMPILE);
+	if (antialiased) {
+	    // calling glBitmap() is just a trick to move the current
+	    // raster pos, since glGet*() won't work in display lists
+	    glBitmap(0, 0, 0, 0, x0, -y0, 0);
+	    glDrawPixels(bm.pitch, bm.rows, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, aa_glyph);
+	    glBitmap(0, 0, 0, 0, dx-x0, y0, 0);
+	} else {
+	    glBitmap(bm.pitch*8, bm.rows, -x0, y0, dx, dy, ua_glyph);
+	}
+	glEndList();
+	antialiased ? delete[] aa_glyph : delete[] ua_glyph;
+    }
+
+#ifdef QT_XFT2
+    XftUnlockFace(engine->font());
+#endif
+
+    // restore pixel unpack settings
+    glPixelStorei(GL_UNPACK_SWAP_BYTES, gl_swapbytes);
+    glPixelStorei(GL_UNPACK_LSB_FIRST, gl_lsbfirst);
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, gl_rowlength);
+    glPixelStorei(GL_UNPACK_SKIP_ROWS, gl_skiprows);
+    glPixelStorei(GL_UNPACK_SKIP_PIXELS, gl_skippixels);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, gl_alignment);
+}
+#endif
+
+void TQGLContext::generateFontDisplayLists( const TQFont & fnt, int listBase )
+{
+    TQFont f(fnt);
+    TQFontEngine *engine = f.d->engineForScript(TQFont::Latin);
+
+#ifndef QT_NO_XFTFREETYPE
+    if(engine->type() == TQFontEngine::Xft) {
+	qgl_use_font((TQFontEngineXft *) engine, 0, 256, listBase);
+	return;
+    }
+#endif
+    // glXUseXFont() only works with XLFD font structures and a few GL
+    // drivers crash if 0 is passed as the font handle
+    f.setStyleStrategy(TQFont::OpenGLCompatible);
+    if (f.handle() && (engine->type() == TQFontEngine::XLFD
+		       || engine->type() == TQFontEngine::LatinXLFD)) {
+ 	glXUseXFont((Font) f.handle(), 0, 256, listBase);
+    }
+}
+
+/*****************************************************************************
+  TQGLOverlayWidget (Internal overlay class for X11)
+ *****************************************************************************/
+
+class TQGLOverlayWidget : public TQGLWidget
+{
+    Q_OBJECT
+public:
+    TQGLOverlayWidget( const TQGLFormat& format, TQGLWidget* parent,
+		      const char* name=0, const TQGLWidget* shareWidget=0 );
+
+protected:
+    void		initializeGL();
+    void		paintGL();
+    void		resizeGL( int w, int h );
+
+private:
+    TQGLWidget*		realWidget;
+
+private:	// Disabled copy constructor and operator=
+#if defined(Q_DISABLE_COPY)
+    TQGLOverlayWidget( const TQGLOverlayWidget& );
+    TQGLOverlayWidget&	operator=( const TQGLOverlayWidget& );
+#endif
+};
+
+
+TQGLOverlayWidget::TQGLOverlayWidget( const TQGLFormat& format, TQGLWidget* parent,
+				    const char* name,
+				    const TQGLWidget* shareWidget )
+    : TQGLWidget( format, parent, name, shareWidget ? shareWidget->olw : 0 )
+{
+    realWidget = parent;
+}
+
+
+
+void TQGLOverlayWidget::initializeGL()
+{
+    TQColor transparentColor = context()->overlayTransparentColor();
+    if ( transparentColor.isValid() )
+	qglClearColor( transparentColor );
+    else
+	qWarning( "TQGLOverlayWidget::initializeGL(): Could not get transparent color" );
+    realWidget->initializeOverlayGL();
+}
+
+
+void TQGLOverlayWidget::resizeGL( int w, int h )
+{
+    glViewport( 0, 0, w, h );
+    realWidget->resizeOverlayGL( w, h );
+}
+
+
+void TQGLOverlayWidget::paintGL()
+{
+    realWidget->paintOverlayGL();
+}
+
+#undef Bool
+#include "qgl_x11.moc"
+
+/*****************************************************************************
+  TQGLWidget UNIX/GLX-specific code
+ *****************************************************************************/
+void TQGLWidget::init( TQGLContext *context, const TQGLWidget *shareWidget )
+{
+    qt_resolve_gl_symbols();
+
+    glcx = 0;
+    olw = 0;
+    autoSwap = TRUE;
+    if ( !context->device() )
+	context->setDevice( this );
+
+    if ( shareWidget )
+	setContext( context, shareWidget->context() );
+    else
+	setContext( context );
+    setBackgroundMode( NoBackground );
+
+    if ( isValid() && context->format().hasOverlay() ) {
+	TQCString olwName( name() );
+	olwName += "-TQGL_internal_overlay_widget";
+	olw = new TQGLOverlayWidget( TQGLFormat::defaultOverlayFormat(),
+				    this, olwName, shareWidget );
+	if ( olw->isValid() ) {
+	    olw->setAutoBufferSwap( FALSE );
+	    olw->setFocusProxy( this );
+	}
+	else {
+	    delete olw;
+	    olw = 0;
+	    glcx->glFormat.setOverlay( FALSE );
+	}
+    }
+}
+
+/*! \reimp */
+void TQGLWidget::reparent( TQWidget* parent, WFlags f, const TQPoint& p,
+			  bool showIt )
+{
+    if (glcx)
+        glcx->doneCurrent();
+    TQWidget::reparent( parent, f, p, FALSE );
+    if ( showIt )
+	show();
+}
+
+
+void TQGLWidget::setMouseTracking( bool enable )
+{
+    if ( olw )
+	olw->setMouseTracking( enable );
+    TQWidget::setMouseTracking( enable );
+}
+
+
+void TQGLWidget::resizeEvent( TQResizeEvent * )
+{
+    if ( !isValid() )
+	return;
+    makeCurrent();
+    if ( !glcx->initialized() )
+	glInit();
+    glXWaitX();
+    resizeGL( width(), height() );
+    if ( olw )
+	olw->setGeometry( rect() );
+}
+
+const TQGLContext* TQGLWidget::overlayContext() const
+{
+    if ( olw )
+	return olw->context();
+    else
+	return 0;
+}
+
+
+void TQGLWidget::makeOverlayCurrent()
+{
+    if ( olw )
+	olw->makeCurrent();
+}
+
+
+void TQGLWidget::updateOverlayGL()
+{
+    if ( olw )
+	olw->updateGL();
+}
+
+void TQGLWidget::setContext( TQGLContext *context,
+			    const TQGLContext* shareContext,
+			    bool deleteOldContext )
+{
+    if ( context == 0 ) {
+#if defined(QT_CHECK_NULL)
+	qWarning( "TQGLWidget::setContext: Cannot set null context" );
+#endif
+	return;
+    }
+    if ( !context->deviceIsPixmap() && context->device() != this ) {
+#if defined(QT_CHECK_STATE)
+	qWarning( "TQGLWidget::setContext: Context must refer to this widget" );
+#endif
+	return;
+    }
+
+    if ( glcx )
+	glcx->doneCurrent();
+    TQGLContext* oldcx = glcx;
+    glcx = context;
+
+    bool createFailed = FALSE;
+    if ( !glcx->isValid() ) {
+	if ( !glcx->create( shareContext ? shareContext : oldcx ) )
+	    createFailed = TRUE;
+    }
+    if ( createFailed ) {
+	if ( deleteOldContext )
+	    delete oldcx;
+	return;
+    }
+
+    if ( glcx->windowCreated() || glcx->deviceIsPixmap() ) {
+	if ( deleteOldContext )
+	    delete oldcx;
+	return;
+    }
+
+    bool visible = isVisible();
+    if ( visible )
+	hide();
+
+    XVisualInfo *vi = (XVisualInfo*)glcx->vi;
+    XSetWindowAttributes a;
+
+    a.colormap = choose_cmap( x11Display(), vi );	// find best colormap
+    a.background_pixel = backgroundColor().pixel( vi->screen );
+    a.border_pixel = black.pixel( vi->screen );
+    Window p = RootWindow( x11Display(), vi->screen );
+    if ( parentWidget() )
+	p = parentWidget()->winId();
+
+    Window w = XCreateWindow( x11Display(), p,  x(), y(), width(), height(),
+			      0, vi->depth, InputOutput,  vi->visual,
+			      CWBackPixel|CWBorderPixel|CWColormap, &a );
+
+    Window *cmw;
+    Window *cmwret;
+    int count;
+    if ( XGetWMColormapWindows( x11Display(), topLevelWidget()->winId(),
+				&cmwret, &count ) ) {
+	cmw = new Window[count+1];
+	memcpy( (char *)cmw, (char *)cmwret, sizeof(Window)*count );
+	XFree( (char *)cmwret );
+	int i;
+	for ( i=0; i<count; i++ ) {
+	    if ( cmw[i] == winId() ) {		// replace old window
+		cmw[i] = w;
+		break;
+	    }
+	}
+	if ( i >= count )			// append new window
+	    cmw[count++] = w;
+    } else {
+	count = 1;
+	cmw = new Window[count];
+	cmw[0] = w;
+    }
+
+#if defined(GLX_MESA_release_buffers) && defined(TQGL_USE_MESA_EXT)
+    if ( oldcx && oldcx->windowCreated() )
+	glXReleaseBuffersMESA( x11Display(), winId() );
+#endif
+    if ( deleteOldContext )
+	delete oldcx;
+    oldcx = 0;
+
+    create( w );
+
+    XSetWMColormapWindows( x11Display(), topLevelWidget()->winId(), cmw,
+			   count );
+    delete [] cmw;
+
+    if ( visible )
+	show();
+    XFlush( x11Display() );
+    glcx->setWindowCreated( TRUE );
+}
+
+
+bool TQGLWidget::renderCxPm( TQPixmap* pm )
+{
+    if ( ((XVisualInfo*)glcx->vi)->depth != pm->depth() )
+	return FALSE;
+
+    GLXPixmap glPm;
+#if defined(GLX_MESA_pixmap_colormap) && defined(TQGL_USE_MESA_EXT)
+    glPm = glXCreateGLXPixmapMESA( x11Display(),
+				   (XVisualInfo*)glcx->vi,
+				   (Pixmap)pm->handle(),
+				   choose_cmap( pm->x11Display(),
+						(XVisualInfo*)glcx->vi ) );
+#else
+    glPm = (Q_UINT32)glXCreateGLXPixmap( x11Display(),
+					 (XVisualInfo*)glcx->vi,
+					 (Pixmap)pm->handle() );
+#endif
+
+    if ( !glXMakeCurrent( x11Display(), glPm, (GLXContext)glcx->cx ) ) {
+	glXDestroyGLXPixmap( x11Display(), glPm );
+	return FALSE;
+    }
+
+    glDrawBuffer( GL_FRONT );
+    if ( !glcx->initialized() )
+	glInit();
+    resizeGL( pm->width(), pm->height() );
+    paintGL();
+    glFlush();
+    makeCurrent();
+    glXDestroyGLXPixmap( x11Display(), glPm );
+    resizeGL( width(), height() );
+    return TRUE;
+}
+
+const TQGLColormap & TQGLWidget::colormap() const
+{
+    return cmap;
+}
+
+/*\internal
+  Store color values in the given colormap.
+*/
+static void qStoreColors( TQWidget * tlw, Colormap cmap,
+			  const TQGLColormap & cols )
+{
+    XColor c;
+    TQRgb color;
+
+    for ( int i = 0; i < cols.size(); i++ ) {
+	color = cols.entryRgb( i );
+	c.pixel = i;
+	c.red   = (ushort)( (qRed( color ) / 255.0) * 65535.0 + 0.5 );
+	c.green = (ushort)( (qGreen( color ) / 255.0) * 65535.0 + 0.5 );
+	c.blue  = (ushort)( (qBlue( color ) / 255.0) * 65535.0 + 0.5 );
+	c.flags = DoRed | DoGreen | DoBlue;
+	XStoreColor( tlw->x11Display(), cmap, &c );
+    }
+}
+
+/*\internal
+  Check whether the given visual supports dynamic colormaps or not.
+*/
+static bool qCanAllocColors( TQWidget * w )
+{
+    bool validVisual = FALSE;
+    int  numVisuals;
+    long mask;
+    XVisualInfo templ;
+    XVisualInfo * visuals;
+    VisualID id = XVisualIDFromVisual( (Visual *)
+				       w->topLevelWidget()->x11Visual() );
+
+    mask = VisualScreenMask;
+    templ.screen = w->x11Screen();
+    visuals = XGetVisualInfo( w->x11Display(), mask, &templ, &numVisuals );
+
+    for ( int i = 0; i < numVisuals; i++ ) {
+	if ( visuals[i].visualid == id ) {
+	    switch ( visuals[i].c_class ) {
+		case TrueColor:
+		case StaticColor:
+		case StaticGray:
+		case GrayScale:
+		    validVisual = FALSE;
+		    break;
+		case DirectColor:
+		case PseudoColor:
+		    validVisual = TRUE;
+		    break;
+	    }
+	    break;
+	}
+    }
+    XFree( visuals );
+
+    if ( !validVisual )
+	return FALSE;
+    return TRUE;
+}
+
+void TQGLWidget::setColormap( const TQGLColormap & c )
+{
+    TQWidget * tlw = topLevelWidget(); // must return a valid widget
+
+    cmap = c;
+    if ( !cmap.d )
+	return;
+
+    if ( !cmap.d->cmapHandle && !qCanAllocColors( this ) ) {
+	qWarning( "TQGLWidget::setColormap: Cannot create a read/write "
+		  "colormap for this visual" );
+	return;
+    }
+
+    // If the child GL widget is not of the same visual class as the
+    // toplevel widget we will get in trouble..
+    Window wid = tlw->winId();
+    Visual * vis = (Visual *) tlw->x11Visual();;
+    VisualID cvId = XVisualIDFromVisual( (Visual *) x11Visual() );
+    VisualID tvId = XVisualIDFromVisual( (Visual *) tlw->x11Visual() );
+    if ( cvId != tvId ) {
+	wid = winId();
+	vis = (Visual *) x11Visual();
+    }
+
+    if ( !cmap.d->cmapHandle ) // allocate a cmap if necessary
+	cmap.d->cmapHandle = XCreateColormap( x11Display(), wid, vis,
+					      AllocAll );
+
+    qStoreColors( this, (Colormap) cmap.d->cmapHandle, c );
+    XSetWindowColormap( x11Display(), wid, (Colormap) cmap.d->cmapHandle );
+
+    // tell the wm that this window has a special colormap
+    Window * cmw;
+    Window * cmwret;
+    int count;
+    if ( XGetWMColormapWindows( x11Display(), tlw->winId(), &cmwret,
+				&count ) )
+    {
+	cmw = new Window[count+1];
+	memcpy( (char *) cmw, (char *) cmwret, sizeof(Window) * count );
+	XFree( (char *) cmwret );
+	int i;
+	for ( i = 0; i < count; i++ ) {
+	    if ( cmw[i] == winId() ) {
+		break;
+	    }
+	}
+	if ( i >= count )   // append new window only if not in the list
+	    cmw[count++] = winId();
+    } else {
+	count = 1;
+	cmw = new Window[count];
+	cmw[0] = winId();
+    }
+    XSetWMColormapWindows( x11Display(), tlw->winId(), cmw, count );
+    delete [] cmw;
+}
+
+/*! \internal
+  Free up any allocated colormaps. This fn is only called for
+  top-level widgets.
+*/
+void TQGLWidget::cleanupColormaps()
+{
+    if ( !cmap.d )
+	return;
+
+    if ( cmap.d->cmapHandle ) {
+	XFreeColormap( topLevelWidget()->x11Display(),
+		       (Colormap) cmap.d->cmapHandle );
+	cmap.d->cmapHandle = 0;
+    }
+}
+
+void TQGLWidget::macInternalFixBufferRect()
+{
+}
+
+#endif
diff --git a/src/opengl/qgl_x11_p.h b/src/opengl/qgl_x11_p.h
new file mode 100644
index 000000000..b74b385f4
--- /dev/null
+++ b/src/opengl/qgl_x11_p.h
@@ -0,0 +1,197 @@
+/****************************************************************************
+**
+** Definitions needed for resolving GL/GLX symbols using dlopen()
+** under X11.
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the OpenGL module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** Licensees holding valid TQt Commercial licenses may use this file in
+** accordance with the TQt Commercial License Agreement provided with
+** the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#ifndef TQGL_P_H
+#define TQGL_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the TQt API.  This header file may
+// change from version to version without notice, or even be
+// removed.
+//
+// We mean it.
+//
+//
+
+#ifdef QT_DLOPEN_OPENGL
+// resolve the GL symbols we use ourselves
+bool qt_resolve_gl_symbols(bool = TRUE);
+extern "C" {
+// GL symbols
+typedef void (*_glCallLists)( GLsizei n, GLenum type, const GLvoid *lists );
+typedef void (*_glClearColor)( GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha );
+typedef void (*_glClearIndex)( GLfloat c );
+typedef void (*_glColor3ub)( GLubyte red, GLubyte green, GLubyte blue );
+typedef void (*_glDeleteLists)( GLuint list, GLsizei range );
+typedef void (*_glDrawBuffer)( GLenum mode );
+typedef void (*_glFlush)( void );
+typedef void (*_glIndexi)( GLint c );
+typedef void (*_glListBase)( GLuint base );
+typedef void (*_glLoadIdentity)( void );
+typedef void (*_glMatrixMode)( GLenum mode );
+typedef void (*_glOrtho)( GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val );
+typedef void (*_glPopAttrib)( void );
+typedef void (*_glPopMatrix)( void );
+typedef void (*_glPushAttrib)( GLbitfield mask );
+typedef void (*_glPushMatrix)( void );
+typedef void (*_glRasterPos2i)( GLint x, GLint y );
+typedef void (*_glRasterPos3d)( GLdouble x, GLdouble y, GLdouble z );
+typedef void (*_glReadPixels)( GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels );
+typedef void (*_glViewport)( GLint x, GLint y, GLsizei width, GLsizei height );
+typedef void (*_glPixelStorei)( GLenum pname, GLint param );
+typedef void (*_glBitmap)( GLsizei width, GLsizei height, GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
+			   const GLubyte *bitmap );
+typedef void (*_glDrawPixels)( GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels );
+typedef void (*_glNewList)( GLuint list, GLenum mode );
+typedef void (*_glGetFloatv)( GLenum pname, GLfloat *params );
+typedef void (*_glGetIntegerv)( GLenum pname, GLint *params );
+typedef void (*_glEndList)( void );
+
+
+// GLX symbols - should be in the GL lib as well
+typedef XVisualInfo* (*_glXChooseVisual)(Display *dpy, int screen, int *attribList);
+typedef GLXContext (*_glXCreateContext)(Display *dpy, XVisualInfo *vis, GLXContext shareList, Bool direct);
+typedef GLXPixmap (*_glXCreateGLXPixmap)(Display *dpy, XVisualInfo *vis, Pixmap pixmap);
+typedef void (*_glXDestroyContext)(Display *dpy, GLXContext ctx);
+typedef void (*_glXDestroyGLXPixmap)(Display *dpy, GLXPixmap pix);
+typedef const char* (*_glXGetClientString)(Display *dpy, int name );
+typedef int (*_glXGetConfig)(Display *dpy, XVisualInfo *vis, int attrib, int *value);
+typedef Bool (*_glXIsDirect)(Display *dpy, GLXContext ctx);
+typedef Bool (*_glXMakeCurrent)(Display *dpy, GLXDrawable drawable, GLXContext ctx);
+typedef Bool (*_glXQueryExtension)(Display *dpy, int *errorBase, int *eventBase);
+typedef const char* (*_glXQueryExtensionsString)(Display *dpy, int screen);
+typedef const char* (*_glXQueryServerString)(Display *dpy, int screen, int name);
+typedef void (*_glXSwapBuffers)(Display *dpy, GLXDrawable drawable);
+typedef void (*_glXUseXFont)(Font font, int first, int count, int listBase);
+typedef void (*_glXWaitX)(void);
+
+extern _glCallLists qt_glCallLists;
+extern _glClearColor qt_glClearColor;
+extern _glClearIndex qt_glClearIndex;
+extern _glColor3ub qt_glColor3ub;
+extern _glDeleteLists qt_glDeleteLists;
+extern _glDrawBuffer qt_glDrawBuffer;
+extern _glFlush qt_glFlush;
+extern _glIndexi qt_glIndexi;
+extern _glListBase qt_glListBase;
+extern _glLoadIdentity qt_glLoadIdentity;
+extern _glMatrixMode qt_glMatrixMode;
+extern _glOrtho qt_glOrtho;
+extern _glPopAttrib qt_glPopAttrib;
+extern _glPopMatrix qt_glPopMatrix;
+extern _glPushAttrib qt_glPushAttrib;
+extern _glPushMatrix qt_glPushMatrix;
+extern _glRasterPos2i qt_glRasterPos2i;
+extern _glRasterPos3d qt_glRasterPos3d;
+extern _glReadPixels qt_glReadPixels;
+extern _glViewport qt_glViewport;
+extern _glPixelStorei qt_glPixelStorei;
+extern _glBitmap qt_glBitmap;
+extern _glDrawPixels qt_glDrawPixels;
+extern _glNewList qt_glNewList;
+extern _glGetFloatv qt_glGetFloatv;
+extern _glGetIntegerv qt_glGetIntegerv;
+extern _glEndList qt_glEndList;
+
+extern _glXChooseVisual qt_glXChooseVisual;
+extern _glXCreateContext qt_glXCreateContext;
+extern _glXCreateGLXPixmap qt_glXCreateGLXPixmap;
+extern _glXDestroyContext qt_glXDestroyContext;
+extern _glXDestroyGLXPixmap qt_glXDestroyGLXPixmap;
+extern _glXGetClientString qt_glXGetClientString;
+extern _glXGetConfig qt_glXGetConfig;
+extern _glXIsDirect qt_glXIsDirect;
+extern _glXMakeCurrent qt_glXMakeCurrent;
+extern _glXQueryExtension qt_glXQueryExtension;
+extern _glXQueryExtensionsString qt_glXQueryExtensionsString;
+extern _glXQueryServerString qt_glXQueryServerString;
+extern _glXSwapBuffers qt_glXSwapBuffers;
+extern _glXUseXFont qt_glXUseXFont;
+extern _glXWaitX qt_glXWaitX;
+}; // extern "C"
+
+#define glCallLists qt_glCallLists
+#define glClearColor qt_glClearColor
+#define glClearIndex qt_glClearIndex
+#define glColor3ub qt_glColor3ub
+#define glDeleteLists qt_glDeleteLists
+#define glDrawBuffer qt_glDrawBuffer
+#define glFlush qt_glFlush
+#define glIndexi qt_glIndexi
+#define glListBase qt_glListBase
+#define glLoadIdentity qt_glLoadIdentity
+#define glMatrixMode qt_glMatrixMode
+#define glOrtho qt_glOrtho
+#define glPopAttrib qt_glPopAttrib
+#define glPopMatrix qt_glPopMatrix
+#define glPushAttrib qt_glPushAttrib
+#define glPushMatrix qt_glPushMatrix
+#define glRasterPos2i qt_glRasterPos2i
+#define glRasterPos3d qt_glRasterPos3d
+#define glReadPixels qt_glReadPixels
+#define glViewport qt_glViewport
+#define glPixelStorei qt_glPixelStorei
+#define glBitmap qt_glBitmap
+#define glDrawPixels qt_glDrawPixels
+#define glNewList qt_glNewList
+#define glGetFloatv qt_glGetFloatv
+#define glGetIntegerv qt_glGetIntegerv
+#define glEndList qt_glEndList
+
+#define glXChooseVisual qt_glXChooseVisual
+#define glXCreateContext qt_glXCreateContext
+#define glXCreateGLXPixmap qt_glXCreateGLXPixmap
+#define glXDestroyContext qt_glXDestroyContext
+#define glXDestroyGLXPixmap qt_glXDestroyGLXPixmap
+#define glXGetClientString qt_glXGetClientString
+#define glXGetConfig qt_glXGetConfig
+#define glXIsDirect qt_glXIsDirect
+#define glXMakeCurrent qt_glXMakeCurrent
+#define glXQueryExtension qt_glXQueryExtension
+#define glXQueryExtensionsString qt_glXQueryExtensionsString
+#define glXQueryServerString qt_glXQueryServerString
+#define glXSwapBuffers qt_glXSwapBuffers
+#define glXUseXFont qt_glXUseXFont
+#define glXWaitX qt_glXWaitX
+
+#else
+inline bool qt_resolve_gl_symbols(bool = TRUE) { return TRUE; }
+#endif // QT_DLOPEN_OPENGL
+#endif // TQGL_P_H
diff --git a/src/opengl/qglcolormap.cpp b/src/opengl/qglcolormap.cpp
new file mode 100644
index 000000000..e4c3efee0
--- /dev/null
+++ b/src/opengl/qglcolormap.cpp
@@ -0,0 +1,292 @@
+/****************************************************************************
+**
+** Implementation of TQGLColormap class
+**
+** Created : 20010326
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the opengl module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file.  Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+/*!
+    \class TQGLColormap qglcolormap.h
+    \brief The TQGLColormap class is used for installing custom colormaps into
+    TQGLWidgets.
+\if defined(commercial)
+    It is part of the <a href="commercialeditions.html">TQt Enterprise Edition</a>.
+\endif
+
+    \module OpenGL
+    \ingroup graphics
+    \ingroup images
+
+    TQGLColormap provides a platform independent way of specifying and
+    installing indexed colormaps into TQGLWidgets. TQGLColormap is
+    especially useful when using the \link opengl.html OpenGL\endlink
+    color-index mode.
+
+    Under X11 you must use an X server that supports either a \c
+    PseudoColor or \c DirectColor visual class. If your X server
+    currently only provides a \c GrayScale, \c TrueColor, \c
+    StaticColor or \c StaticGray visual, you will not be able to
+    allocate colorcells for writing. If this is the case, try setting
+    your X server to 8 bit mode. It should then provide you with at
+    least a \c PseudoColor visual. Note that you may experience
+    colormap flashing if your X server is running in 8 bit mode.
+
+    Under Windows the size of the colormap is always set to 256
+    colors. Note that under Windows you can also install colormaps
+    in child widgets.
+
+    This class uses explicit sharing (see \link shclass.html Shared
+    Classes\endlink).
+
+    Example of use:
+    \code
+    #include <qapplication.h>
+    #include <qglcolormap.h>
+
+    int main()
+    {
+	TQApplication a( argc, argv );
+
+	MySuperGLWidget widget( 0 ); // A TQGLWidget in color-index mode
+	TQGLColormap colormap;
+
+	// This will fill the colormap with colors ranging from
+	// black to white.
+	for ( int i = 0; i < colormap.size(); i++ )
+	    colormap.setEntry( i, qRgb( i, i, i ) );
+
+	widget.setColormap( colormap );
+	widget.show();
+	return a.exec();
+    }
+    \endcode
+
+    \sa TQGLWidget::setColormap(), TQGLWidget::colormap()
+*/
+
+#include "qglcolormap.h"
+#include "qmemarray.h"
+
+
+/*!
+    Construct a TQGLColormap.
+*/
+TQGLColormap::TQGLColormap()
+{
+    d = 0;
+}
+
+
+/*!
+    Construct a shallow copy of \a map.
+*/
+TQGLColormap::TQGLColormap( const TQGLColormap & map )
+{
+    d = map.d;
+    if ( d )
+	d->ref();
+}
+
+/*!
+    Dereferences the TQGLColormap and deletes it if this was the last
+    reference to it.
+*/
+TQGLColormap::~TQGLColormap()
+{
+    if ( d && d->deref() ) {
+	delete d;
+	d = 0;
+    }
+}
+
+/*!
+    Assign a shallow copy of \a map to this TQGLColormap.
+*/
+TQGLColormap & TQGLColormap::operator=( const TQGLColormap & map )
+{
+    if ( map.d != 0 )
+	map.d->ref();
+
+    if ( d && d->deref() )
+	delete d;
+    d = map.d;
+
+    return *this;
+}
+
+/*!
+    Detaches this TQGLColormap from the shared block.
+*/
+void TQGLColormap::detach()
+{
+    if ( d && d->count != 1 ) {
+	// ### What about the actual colormap handle?
+	Private * newd = new Private();
+	newd->cells = d->cells;
+	newd->cells.detach();
+	if ( d->deref() )
+	    delete d;
+	d = newd;
+    }
+}
+
+/*!
+    Set cell at index \a idx in the colormap to color \a color.
+*/
+void TQGLColormap::setEntry( int idx, TQRgb color )
+{
+    if ( !d )
+	d = new Private();
+
+#if defined(QT_CHECK_RANGE)
+    if ( idx < 0 || idx > (int) d->cells.size() ) {
+	qWarning( "TQGLColormap::setRgb: Index out of range." );
+	return;
+    }
+#endif
+    d->cells[ idx ] = color;
+}
+
+/*!
+    Set an array of cells in this colormap. \a count is the number of
+    colors that should be set, \a colors is the array of colors, and
+    \a base is the starting index.
+*/
+void TQGLColormap::setEntries( int count, const TQRgb * colors, int base )
+{
+    if ( !d )
+	d = new Private();
+
+    if ( !colors || base < 0 || base >= (int) d->cells.size() )
+	return;
+
+    for( int i = base; i < base + count; i++ ) {
+	if ( i < (int) d->cells.size() )
+	    setEntry( i, colors[i] );
+	else
+	    break;
+    }
+}
+
+/*!
+    Returns the TQRgb value in the colorcell with index \a idx.
+*/
+TQRgb TQGLColormap::entryRgb( int idx ) const
+{
+    if ( !d || idx < 0 || idx > (int) d->cells.size() )
+	return 0;
+    else
+	return d->cells[ idx ];
+}
+
+/*!
+    \overload
+
+    Set the cell with index \a idx in the colormap to color \a color.
+*/
+void TQGLColormap::setEntry( int idx, const TQColor & color )
+{
+    setEntry( idx, color.rgb() );
+}
+
+/*!
+    Returns the TQRgb value in the colorcell with index \a idx.
+*/
+TQColor TQGLColormap::entryColor( int idx ) const
+{
+    if ( !d || idx < 0 || idx > (int) d->cells.size() )
+	return TQColor();
+    else
+	return TQColor( d->cells[ idx ] );
+}
+
+/*!
+    Returns TRUE if the colormap is empty; otherwise returns FALSE. A
+    colormap with no color values set is considered to be empty.
+*/
+bool TQGLColormap::isEmpty() const
+{
+    return (d == 0) || (d->cells.size() == 0)  || (d->cmapHandle == 0);
+}
+
+
+/*!
+    Returns the number of colorcells in the colormap.
+*/
+int TQGLColormap::size() const
+{
+    return d != 0 ? d->cells.size() : 0;
+}
+
+/*!
+    Returns the index of the color \a color. If \a color is not in the
+    map, -1 is returned.
+*/
+int TQGLColormap::find( TQRgb color ) const
+{
+    if ( d )
+	return d->cells.find( color );
+    return -1;
+}
+
+/*!
+    Returns the index of the color that is the closest match to color
+    \a color.
+*/
+int TQGLColormap::findNearest( TQRgb color ) const
+{
+    int idx = find( color );
+    if ( idx >= 0 )
+	return idx;
+    int mapSize = size();
+    int mindist = 200000;
+    int r = qRed( color );
+    int g = qGreen( color );
+    int b = qBlue( color );
+    int rx, gx, bx, dist;
+    for ( int i=0; i < mapSize; i++ ) {
+	TQRgb ci = d->cells[i];
+	rx = r - qRed( ci );
+	gx = g - qGreen( ci );
+	bx = b - qBlue( ci );
+	dist = rx*rx + gx*gx + bx*bx;	// calculate distance
+	if ( dist < mindist ) {		// minimal?
+	    mindist = dist;
+	    idx = i;
+	}
+    }
+    return idx;
+}
diff --git a/src/opengl/qglcolormap.h b/src/opengl/qglcolormap.h
new file mode 100644
index 000000000..8940f2e80
--- /dev/null
+++ b/src/opengl/qglcolormap.h
@@ -0,0 +1,99 @@
+/****************************************************************************
+**
+** Definition of TQGLColormap class
+**
+** Created : 20010326
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the opengl module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at [email protected].
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file.  Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#ifndef TQGLCOLORMAP_H
+#define TQGLCOLORMAP_H
+
+#ifndef QT_H
+#include "qcolor.h"
+#include "qmemarray.h"
+#include "qshared.h"
+#endif // QT_H
+
+#if !defined( QT_MODULE_OPENGL ) || defined( QT_LICENSE_PROFESSIONAL )
+#define TQM_EXPORT_OPENGL
+#else
+#define TQM_EXPORT_OPENGL Q_EXPORT
+#endif
+
+class TQWidget;
+class TQM_EXPORT_OPENGL TQGLColormap
+{
+public:
+    TQGLColormap();
+    TQGLColormap( const TQGLColormap & );
+    ~TQGLColormap();
+    
+    TQGLColormap &operator=( const TQGLColormap & );
+    
+    bool   isEmpty() const;
+    int    size() const;
+    void   detach();
+
+    void   setEntries( int count, const TQRgb * colors, int base = 0 );
+    void   setEntry( int idx, TQRgb color );
+    void   setEntry( int idx, const TQColor & color );
+    TQRgb   entryRgb( int idx ) const;
+    TQColor entryColor( int idx ) const;
+    int    find( TQRgb color ) const;
+    int    findNearest( TQRgb color ) const;
+    
+private:
+    class Private : public TQShared
+    {
+    public:
+	Private() {
+	    cells.resize( 256 ); // ### hardcoded to 256 entries for now
+	    cmapHandle = 0;
+	}
+
+	~Private() {
+	}
+
+	TQMemArray<TQRgb> cells;
+	TQt::HANDLE      cmapHandle;
+    };
+    
+    Private * d;
+
+    friend class TQGLWidget;
+};
+
+#endif
diff --git a/src/opengl/qt_opengl.pri b/src/opengl/qt_opengl.pri
new file mode 100644
index 000000000..bb0a5d869
--- /dev/null
+++ b/src/opengl/qt_opengl.pri
@@ -0,0 +1,18 @@
+# Qt opengl module
+
+opengl {
+	HEADERS += $$OPENGL_H/qgl.h \
+		   $$OPENGL_H/qglcolormap.h
+	SOURCES	+= $$OPENGL_CPP/qgl.cpp \
+		   $$OPENGL_CPP/qglcolormap.cpp
+	x11 {
+		HEADERS += $$OPENGL_H/qgl_x11_p.h
+		SOURCES += $$OPENGL_CPP/qgl_x11.cpp
+	}
+	else:mac:SOURCES += $$OPENGL_CPP/qgl_mac.cpp
+	else:win32:SOURCES += $$OPENGL_CPP/qgl_win.cpp
+
+	dlopen_opengl:DEFINES+=QT_DLOPEN_OPENGL
+}
+
+