Test conversion to TQt3 from Qt3 8c6fc1f8e35fd264dd01c582ca5e7549b32ab731

61 files changed, 4313 insertions, 0 deletions

diff --git a/examples/opengl/box/README b/examples/opengl/box/README
new file mode 100644
index 000000000..113f82d6c
--- /dev/null
+++ b/examples/opengl/box/README
@@ -0,0 +1,8 @@
+
+The box example
+
+This example program shows how to use OpenGL in Qt: Put your OpenGL
+code in a class inherited from QGLWidget. The resulting subclass may
+be used like any other Qt widget, with signals and slots, geometry
+management, etc..
+
diff --git a/examples/opengl/box/box.doc b/examples/opengl/box/box.doc
new file mode 100644
index 000000000..51297fa35
--- /dev/null
+++ b/examples/opengl/box/box.doc
@@ -0,0 +1,18 @@
+/*!   \page opengl-box-example.html
+
+  \ingroup opengl-examples
+  \title OpenGL Box Example
+
+This example demonstrates how to use OpenGL in Qt. 
+
+Essentially, all you do is put your OpenGL code in a class inherited
+from QGLWidget. This class may then be used like any other Qt widget,
+including the use of signals and slots and geometry management.
+
+See \c{$QTDIR/examples/opengl/box} for the source code.
+
+*/
+
+
+
+
diff --git a/examples/opengl/box/box.pro b/examples/opengl/box/box.pro
new file mode 100644
index 000000000..80784531f
--- /dev/null
+++ b/examples/opengl/box/box.pro
@@ -0,0 +1,15 @@
+TEMPLATE	= app
+TARGET		= box
+
+CONFIG		+= qt opengl warn_on release
+CONFIG -= dlopen_opengl
+
+DEPENDPATH	= ../include
+
+REQUIRES        = opengl
+
+HEADERS		= glbox.h \
+		  globjwin.h
+SOURCES		= glbox.cpp \
+		  globjwin.cpp \
+		  main.cpp
diff --git a/examples/opengl/box/glbox.cpp b/examples/opengl/box/glbox.cpp
new file mode 100644
index 000000000..aa1792241
--- /dev/null
+++ b/examples/opengl/box/glbox.cpp
@@ -0,0 +1,170 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget displaying an openGL wireframe box
+**
+** The OpenGL code is mostly borrowed from Brian Pauls "spin" example
+** in the Mesa distribution
+**
+****************************************************************************/
+
+#include "glbox.h"
+
+#if defined(Q_CC_MSVC)
+#pragma warning(disable:4305) // init: truncation from const double to float
+#endif
+
+/*!
+  Create a GLBox widget
+*/
+
+GLBox::GLBox( TQWidget* parent, const char* name )
+    : TQGLWidget( parent, name )
+{
+    xRot = yRot = zRot = 0.0;		// default object rotation
+    scale = 1.25;			// default object scale
+    object = 0;
+}
+
+
+/*!
+  Release allocated resources
+*/
+
+GLBox::~GLBox()
+{
+    makeCurrent();
+    glDeleteLists( object, 1 );
+}
+
+
+/*!
+  Paint the box. The actual openGL commands for drawing the box are
+  performed here.
+*/
+
+void GLBox::paintGL()
+{
+    glClear( GL_COLOR_BUFFER_BIT );
+
+    glLoadIdentity();
+    glTranslatef( 0.0, 0.0, -10.0 );
+    glScalef( scale, scale, scale );
+
+    glRotatef( xRot, 1.0, 0.0, 0.0 ); 
+    glRotatef( yRot, 0.0, 1.0, 0.0 ); 
+    glRotatef( zRot, 0.0, 0.0, 1.0 );
+
+    glCallList( object );
+}
+
+
+/*!
+  Set up the OpenGL rendering state, and define display list
+*/
+
+void GLBox::initializeGL()
+{
+    qglClearColor( black ); 		// Let OpenGL clear to black
+    object = makeObject();		// Generate an OpenGL display list
+    glShadeModel( GL_FLAT );
+}
+
+
+
+/*!
+  Set up the OpenGL view port, matrix mode, etc.
+*/
+
+void GLBox::resizeGL( int w, int h )
+{
+    glViewport( 0, 0, (GLint)w, (GLint)h );
+    glMatrixMode( GL_PROJECTION );
+    glLoadIdentity();
+    glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
+    glMatrixMode( GL_MODELVIEW );
+}
+
+
+/*!
+  Generate an OpenGL display list for the object to be shown, i.e. the box
+*/
+
+GLuint GLBox::makeObject()
+{	
+    GLuint list;
+
+    list = glGenLists( 1 );
+
+    glNewList( list, GL_COMPILE );
+
+    qglColor( white );		      // Shorthand for glColor3f or glIndex
+
+    glLineWidth( 2.0 );
+
+    glBegin( GL_LINE_LOOP );
+    glVertex3f(  1.0,  0.5, -0.4 );
+    glVertex3f(  1.0, -0.5, -0.4 );
+    glVertex3f( -1.0, -0.5, -0.4 );
+    glVertex3f( -1.0,  0.5, -0.4 );
+    glEnd();
+
+    glBegin( GL_LINE_LOOP );
+    glVertex3f(  1.0,  0.5, 0.4 );
+    glVertex3f(  1.0, -0.5, 0.4 );
+    glVertex3f( -1.0, -0.5, 0.4 );
+    glVertex3f( -1.0,  0.5, 0.4 );
+    glEnd();
+
+    glBegin( GL_LINES );
+    glVertex3f(  1.0,  0.5, -0.4 );   glVertex3f(  1.0,  0.5, 0.4 );
+    glVertex3f(  1.0, -0.5, -0.4 );   glVertex3f(  1.0, -0.5, 0.4 );
+    glVertex3f( -1.0, -0.5, -0.4 );   glVertex3f( -1.0, -0.5, 0.4 );
+    glVertex3f( -1.0,  0.5, -0.4 );   glVertex3f( -1.0,  0.5, 0.4 );
+    glEnd();
+
+    glEndList();
+
+    return list;
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the X axis.
+*/
+
+void GLBox::setXRotation( int degrees )
+{
+    xRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Y axis.
+*/
+
+void GLBox::setYRotation( int degrees )
+{
+    yRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Z axis.
+*/
+
+void GLBox::setZRotation( int degrees )
+{
+    zRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
diff --git a/examples/opengl/box/glbox.h b/examples/opengl/box/glbox.h
new file mode 100644
index 000000000..a04a8122a
--- /dev/null
+++ b/examples/opengl/box/glbox.h
@@ -0,0 +1,53 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget displaying an openGL wireframe box
+**
+****************************************************************************/
+
+#ifndef GLBOX_H
+#define GLBOX_H
+
+#include <qgl.h>
+
+
+class GLBox : public TQGLWidget
+{
+    Q_OBJECT
+
+public:
+
+    GLBox( TQWidget* parent, const char* name );
+    ~GLBox();
+
+public slots:
+
+    void		setXRotation( int degrees );
+    void		setYRotation( int degrees );
+    void		setZRotation( int degrees );
+
+protected:
+
+    void		initializeGL();
+    void		paintGL();
+    void		resizeGL( int w, int h );
+
+    virtual GLuint 	makeObject();
+
+private:
+
+    GLuint object;
+    GLfloat xRot, yRot, zRot, scale;
+
+};
+
+
+#endif // GLBOX_H
diff --git a/examples/opengl/box/globjwin.cpp b/examples/opengl/box/globjwin.cpp
new file mode 100644
index 000000000..f4af52c36
--- /dev/null
+++ b/examples/opengl/box/globjwin.cpp
@@ -0,0 +1,74 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qpushbutton.h>
+#include <qslider.h>
+#include <qlayout.h>
+#include <qframe.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qapplication.h>
+#include <qkeycode.h>
+#include "globjwin.h"
+#include "glbox.h"
+
+
+GLObjectWindow::GLObjectWindow( TQWidget* parent, const char* name )
+    : TQWidget( parent, name )
+{
+
+    // Create a menu
+    TQPopupMenu *file = new TQPopupMenu( this );
+    file->insertItem( "Exit",  qApp, SLOT(tquit()), CTRL+Key_Q );
+
+    // Create a menu bar
+    TQMenuBar *m = new TQMenuBar( this );
+    m->setSeparator( TQMenuBar::InWindowsStyle );
+    m->insertItem("&File", file );
+
+    // Create a nice frame to put around the OpenGL widget
+    TQFrame* f = new TQFrame( this, "frame" );
+    f->setFrameStyle( TQFrame::Sunken | TQFrame::Panel );
+    f->setLineWidth( 2 );
+
+    // Create our OpenGL widget
+    GLBox* c = new GLBox( f, "glbox");
+
+    // Create the three sliders; one for each rotation axis
+    TQSlider* x = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "xsl" );
+    x->setTickmarks( TQSlider::Left );
+    TQObject::connect( x, SIGNAL(valueChanged(int)),c,SLOT(setXRotation(int)) );
+
+    TQSlider* y = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "ysl" );
+    y->setTickmarks( TQSlider::Left );
+    TQObject::connect( y, SIGNAL(valueChanged(int)),c,SLOT(setYRotation(int)) );
+
+    TQSlider* z = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "zsl" );
+    z->setTickmarks( TQSlider::Left );
+    TQObject::connect( z, SIGNAL(valueChanged(int)),c,SLOT(setZRotation(int)) );
+
+
+    // Now that we have all the widgets, put them into a nice layout
+
+    // Put the sliders on top of each other
+    TQVBoxLayout* vlayout = new TQVBoxLayout( 20, "vlayout");
+    vlayout->addWidget( x );
+    vlayout->addWidget( y );
+    vlayout->addWidget( z );
+
+    // Put the GL widget inside the frame
+    TQHBoxLayout* flayout = new TQHBoxLayout( f, 2, 2, "flayout");
+    flayout->addWidget( c, 1 );
+
+    // Top level layout, puts the sliders to the left of the frame/GL widget
+    TQHBoxLayout* hlayout = new TQHBoxLayout( this, 20, 20, "hlayout");
+    hlayout->setMenuBar( m );
+    hlayout->addLayout( vlayout );
+    hlayout->addWidget( f, 1 );
+}
diff --git a/examples/opengl/box/globjwin.h b/examples/opengl/box/globjwin.h
new file mode 100644
index 000000000..98dad489e
--- /dev/null
+++ b/examples/opengl/box/globjwin.h
@@ -0,0 +1,32 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** The GLObjectWindow contains a GLBox and three sliders connected to
+** the GLBox's rotation slots.
+**
+****************************************************************************/
+
+#ifndef GLOBJWIN_H
+#define GLOBJWIN_H
+
+#include <qwidget.h>
+
+
+class GLObjectWindow : public TQWidget
+{
+    Q_OBJECT
+public:
+    GLObjectWindow( TQWidget* parent = 0, const char* name = 0 );
+
+};
+
+
+#endif // GLOBJWIN_H
diff --git a/examples/opengl/box/main.cpp b/examples/opengl/box/main.cpp
new file mode 100644
index 000000000..4a3863232
--- /dev/null
+++ b/examples/opengl/box/main.cpp
@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// TQt OpenGL example: Box
+//
+// A small example showing how a GLWidget can be used just as any TQt widget
+// 
+// File: main.cpp
+//
+// The main() function 
+// 
+
+#include "globjwin.h"
+#include <qapplication.h>
+#include <qgl.h>
+
+/*
+  The main program is here. 
+*/
+
+int main( int argc, char **argv )
+{
+    TQApplication::setColorSpec( TQApplication::CustomColor );
+    TQApplication a(argc,argv);
+
+    if ( !TQGLFormat::hasOpenGL() ) {
+	qWarning( "This system has no OpenGL support. Exiting." );
+	return -1;
+    }
+
+    GLObjectWindow w;
+    w.resize( 400, 350 );
+    a.setMainWidget( &w );
+    w.show();
+    return a.exec();
+}
diff --git a/examples/opengl/gear/README b/examples/opengl/gear/README
new file mode 100644
index 000000000..15f55e77d
--- /dev/null
+++ b/examples/opengl/gear/README
@@ -0,0 +1,4 @@
+
+The gear example
+
+This example program demonstrates how to use OpenGL display lists.
diff --git a/examples/opengl/gear/gear.cpp b/examples/opengl/gear/gear.cpp
new file mode 100644
index 000000000..843f56384
--- /dev/null
+++ b/examples/opengl/gear/gear.cpp
@@ -0,0 +1,296 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// Draws a gear.
+//
+// Portions of this code have been borrowed from Brian Paul's Mesa
+// distribution.
+//
+
+#include <qgl.h>
+#include <qapplication.h>
+#include <math.h>
+
+#if defined(Q_CC_MSVC)
+#pragma warning(disable:4305) // init: truncation from const double to float
+#endif
+
+/*
+ * Draw a gear wheel.  You'll probably want to call this function when
+ * building a display list since we do a lot of trig here.
+ *
+ * Input:  inner_radius - radius of hole at center
+ *	   outer_radius - radius at center of teeth
+ *	   width - width of gear
+ *	   teeth - number of teeth
+ *	   tooth_depth - depth of tooth
+ */
+static void gear( GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+		  GLint teeth, GLfloat tooth_depth )
+{
+    GLint i;
+    GLfloat r0, r1, r2;
+    GLfloat angle, da;
+    GLfloat u, v, len;
+
+    r0 = inner_radius;
+    r1 = outer_radius - tooth_depth/2.0;
+    r2 = outer_radius + tooth_depth/2.0;
+
+    const double pi = 3.14159264;
+    da = 2.0*pi / teeth / 4.0;
+
+    glShadeModel( GL_FLAT );
+
+    glNormal3f( 0.0, 0.0, 1.0 );
+
+    /* draw front face */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<=teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+	glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+	glVertex3f( r1*cos(angle), r1*sin(angle), width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+    }
+    glEnd();
+
+    /* draw front sides of teeth */
+    glBegin( GL_QUADS );
+    da = 2.0*pi / teeth / 4.0;
+    for (i=0;i<teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	  width*0.5 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	  width*0.5 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+    }
+    glEnd();
+
+
+    glNormal3f( 0.0, 0.0, -1.0 );
+
+    /* draw back face */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<=teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+	glVertex3f( r1*cos(angle), r1*sin(angle), -width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+    }
+    glEnd();
+
+    /* draw back sides of teeth */
+    glBegin( GL_QUADS );
+    da = 2.0*pi / teeth / 4.0;
+    for (i=0;i<teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	  -width*0.5 );
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	  -width*0.5 );
+    }
+    glEnd();
+
+
+    /* draw outward faces of teeth */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	   width*0.5 );
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	  -width*0.5 );
+	u = r2*cos(angle+da) - r1*cos(angle);
+	v = r2*sin(angle+da) - r1*sin(angle);
+	len = sqrt( u*u + v*v );
+	u /= len;
+	v /= len;
+	glNormal3f( v, -u, 0.0 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	   width*0.5 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	  -width*0.5 );
+	glNormal3f( cos(angle), sin(angle), 0.0 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da),  width*0.5 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+	u = r1*cos(angle+3*da) - r2*cos(angle+2*da);
+	v = r1*sin(angle+3*da) - r2*sin(angle+2*da);
+	glNormal3f( v, -u, 0.0 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da),  width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+	glNormal3f( cos(angle), sin(angle), 0.0 );
+    }
+
+    glVertex3f( r1*cos(0.0), r1*sin(0.0), width*0.5 );
+    glVertex3f( r1*cos(0.0), r1*sin(0.0), -width*0.5 );
+
+    glEnd();
+
+
+    glShadeModel( GL_SMOOTH );
+
+    /* draw inside radius cylinder */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<=teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+	glNormal3f( -cos(angle), -sin(angle), 0.0 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+    }
+    glEnd();
+
+}
+
+
+static GLfloat view_rotx=20.0, view_roty=30.0, view_rotz=0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+
+static void draw()
+{
+    angle += 2.0;
+    view_roty += 1.0;
+
+    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+    glPushMatrix();
+    glRotatef( view_rotx, 1.0, 0.0, 0.0 );
+    glRotatef( view_roty, 0.0, 1.0, 0.0 );
+    glRotatef( view_rotz, 0.0, 0.0, 1.0 );
+
+    glPushMatrix();
+    glTranslatef( -3.0, -2.0, 0.0 );
+    glRotatef( angle, 0.0, 0.0, 1.0 );
+    glCallList(gear1);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef( 3.1, -2.0, 0.0 );
+    glRotatef( -2.0*angle-9.0, 0.0, 0.0, 1.0 );
+    glCallList(gear2);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef( -3.1, 2.2, -1.8 );
+    glRotatef( 90.0, 1.0, 0.0, 0.0 );
+    glRotatef( 2.0*angle-2.0, 0.0, 0.0, 1.0 );
+    glCallList(gear3);
+    glPopMatrix();
+
+    glPopMatrix();
+}
+
+
+static int timer_interval = 10;			// timer interval (millisec)
+
+
+class GearWidget : public TQGLWidget
+{
+public:
+    GearWidget( TQWidget *parent=0, const char *name=0 );
+protected:
+    void initializeGL();
+    void resizeGL( int, int );
+    void paintGL();
+    void timerEvent( TQTimerEvent * );
+};
+
+GearWidget::GearWidget( TQWidget *parent, const char *name )
+     : TQGLWidget( parent, name )
+{
+    startTimer( timer_interval );
+}
+
+void GearWidget::initializeGL()
+{
+    static GLfloat pos[4] = {5.0, 5.0, 10.0, 1.0 };
+    static GLfloat ared[4] = {0.8, 0.1, 0.0, 1.0 };
+    static GLfloat agreen[4] = {0.0, 0.8, 0.2, 1.0 };
+    static GLfloat ablue[4] = {0.2, 0.2, 1.0, 1.0 };
+
+    glLightfv( GL_LIGHT0, GL_POSITION, pos );
+    glEnable( GL_CULL_FACE );
+    glEnable( GL_LIGHTING );
+    glEnable( GL_LIGHT0 );
+    glEnable( GL_DEPTH_TEST );
+
+    /* make the gears */
+    gear1 = glGenLists(1);
+    glNewList(gear1, GL_COMPILE);
+    glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, ared );
+    gear( 1.0, 4.0, 1.0, 20, 0.7 );
+    glEndList();
+
+    gear2 = glGenLists(1);
+    glNewList(gear2, GL_COMPILE);
+    glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, agreen );
+    gear( 0.5, 2.0, 2.0, 10, 0.7 );
+    glEndList();
+
+    gear3 = glGenLists(1);
+    glNewList(gear3, GL_COMPILE);
+    glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, ablue );
+    gear( 1.3, 2.0, 0.5, 10, 0.7 );
+    glEndList();
+
+    glEnable( GL_NORMALIZE );
+}
+
+
+void GearWidget::resizeGL( int width, int height )
+{
+    GLfloat w = (float) width / (float) height;
+    GLfloat h = 1.0;
+
+    glViewport( 0, 0, width, height );
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glFrustum( -w, w, -h, h, 5.0, 60.0 );
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    glTranslatef( 0.0, 0.0, -40.0 );
+}
+
+
+void GearWidget::paintGL()
+{
+    draw();
+}
+
+void GearWidget::timerEvent(TQTimerEvent*)
+{
+    updateGL();
+}
+
+
+
+int main( int argc, char **argv )
+{
+    TQApplication::setColorSpec( TQApplication::CustomColor );
+    TQApplication a( argc, argv );
+
+    if ( !TQGLFormat::hasOpenGL() ) {
+	qWarning( "This system has no OpenGL support. Exiting." );
+	return -1;
+    }
+
+    if ( argc >= 2 ) {
+	bool ok = TRUE;
+	timer_interval = TQString::fromLatin1( argv[1] ).toInt( &ok );
+	if ( !ok )
+	    timer_interval = 10;
+    }
+
+    GearWidget w;
+    a.setMainWidget( &w );
+    w.show();
+    return a.exec();
+}
diff --git a/examples/opengl/gear/gear.doc b/examples/opengl/gear/gear.doc
new file mode 100644
index 000000000..2fe049a93
--- /dev/null
+++ b/examples/opengl/gear/gear.doc
@@ -0,0 +1,11 @@
+/*!   \page opengl-gear-example.html
+
+  \ingroup opengl-examples
+  \title OpenGL Gear Example
+
+
+This example demonstrates how to use OpenGL display lists.
+
+See \c{$QTDIR/examples/opengl/gear} for the source code.
+
+*/
diff --git a/examples/opengl/gear/gear.pro b/examples/opengl/gear/gear.pro
new file mode 100644
index 000000000..b91691cba
--- /dev/null
+++ b/examples/opengl/gear/gear.pro
@@ -0,0 +1,12 @@
+TEMPLATE	= app
+TARGET		= gear
+
+CONFIG		+= qt opengl warn_on release
+CONFIG -= dlopen_opengl
+!mac:unix:LIBS  += -lm
+DEPENDPATH	= ../include
+
+REQUIRES        = opengl
+
+HEADERS		=
+SOURCES		= gear.cpp
diff --git a/examples/opengl/glpixmap/README b/examples/opengl/glpixmap/README
new file mode 100644
index 000000000..b01cfafee
--- /dev/null
+++ b/examples/opengl/glpixmap/README
@@ -0,0 +1,8 @@
+
+The OpenGL pixmap example
+
+This example program is an extension of the "box" example program.
+
+It demonstrates how to render OpenGL into a QPixmap.
+
+
diff --git a/examples/opengl/glpixmap/glbox.cpp b/examples/opengl/glpixmap/glbox.cpp
new file mode 100644
index 000000000..fe7c682c5
--- /dev/null
+++ b/examples/opengl/glpixmap/glbox.cpp
@@ -0,0 +1,256 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget displaying a box
+**
+** The OpenGL code is mostly borrowed from Brian Pauls "spin" example
+** in the Mesa distribution
+**
+****************************************************************************/
+
+#include <math.h>
+
+#include "glbox.h"
+
+#if defined(Q_CC_MSVC)
+#pragma warning(disable:4305) // init: truncation from const double to float
+#endif
+
+/*!
+  Create a GLBox widget
+*/
+
+GLBox::GLBox( TQWidget* parent, const char* name, const TQGLWidget* shareWidget )
+    : TQGLWidget( parent, name, shareWidget )
+{
+    xRot = yRot = zRot = 0.0;		// default object rotation
+    scale = 1.5;			// default object scale
+}
+
+
+/*!
+  Create a GLBox widget
+*/
+
+GLBox::GLBox( const TQGLFormat& format, TQWidget* parent, const char* name, 
+	      const TQGLWidget* shareWidget )
+    : TQGLWidget( format, parent, name, shareWidget )
+{
+    xRot = yRot = zRot = 0.0;		// default object rotation
+    scale = 1.5;			// default object scale
+}
+
+
+/*!
+  Release allocated resources
+*/
+
+GLBox::~GLBox()
+{
+}
+
+
+/*!
+  Set up the OpenGL rendering state, and define display list
+*/
+
+void GLBox::initializeGL()
+{
+    qglClearColor( green );		// Let OpenGL clear to green
+    object = makeObject();		// Make display list
+    glEnable( GL_DEPTH_TEST );
+}
+
+
+/*!
+  Set up the OpenGL view port, matrix mode, etc.
+*/
+
+void GLBox::resizeGL( int w, int h )
+{
+    glViewport( 0, 0, (GLint)w, (GLint)h );
+    glMatrixMode( GL_PROJECTION );
+    glLoadIdentity();
+    glFrustum(-1.0, 1.0, -1.0, 1.0, 1.0, 200.0);
+}
+
+
+/*!
+  Paint the box. The actual openGL commands for drawing the box are
+  performed here.
+*/
+
+void GLBox::paintGL()
+{
+    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+    glMatrixMode( GL_MODELVIEW );
+    glLoadIdentity();
+    glTranslatef( 0.0, 0.0, -3.0 );
+    glScalef( scale, scale, scale );
+
+    glRotatef( xRot, 1.0, 0.0, 0.0 ); 
+    glRotatef( yRot, 0.0, 1.0, 0.0 ); 
+    glRotatef( zRot, 0.0, 0.0, 1.0 );
+
+    glCallList( object );
+}
+
+
+
+
+
+
+/*!
+  Generate an OpenGL display list for the object to be shown, i.e. the box
+*/
+
+GLuint GLBox::makeObject()
+{	
+    GLuint list;
+
+    list = glGenLists( 1 );
+
+    glNewList( list, GL_COMPILE );
+
+    GLint i, j, rings, sides;
+    float theta1, phi1, theta2, phi2;
+    float v0[03], v1[3], v2[3], v3[3];
+    float t0[03], t1[3], t2[3], t3[3];
+    float n0[3], n1[3], n2[3], n3[3];
+    float innerRadius=0.4;
+    float outerRadius=0.8;
+    float scalFac;
+    double pi = 3.14159265358979323846;
+
+    rings = 8;
+    sides = 10;
+    scalFac=1/(outerRadius*2);
+
+    for (i = 0; i < rings; i++) {
+        theta1 = (float)i * 2.0 * pi / rings;
+        theta2 = (float)(i + 1) * 2.0 * pi / rings;
+        for (j = 0; j < sides; j++) {
+            phi1 = (float)j * 2.0 * pi / sides;
+            phi2 = (float)(j + 1) * 2.0 * pi / sides;
+
+            v0[0] = cos(theta1) * (outerRadius + innerRadius * cos(phi1));
+            v0[1] = -sin(theta1) * (outerRadius + innerRadius * cos(phi1));
+            v0[2] = innerRadius * sin(phi1);
+
+            v1[0] = cos(theta2) * (outerRadius + innerRadius * cos(phi1));
+            v1[1] = -sin(theta2) * (outerRadius + innerRadius * cos(phi1));
+            v1[2] = innerRadius * sin(phi1);
+            v2[0] = cos(theta2) * (outerRadius + innerRadius * cos(phi2));
+            v2[1] = -sin(theta2) * (outerRadius + innerRadius * cos(phi2));
+            v2[2] = innerRadius * sin(phi2);
+
+            v3[0] = cos(theta1) * (outerRadius + innerRadius * cos(phi2));
+            v3[1] = -sin(theta1) * (outerRadius + innerRadius * cos(phi2));
+            v3[2] = innerRadius * sin(phi2);
+
+            n0[0] = cos(theta1) * (cos(phi1));
+            n0[1] = -sin(theta1) * (cos(phi1));
+            n0[2] = sin(phi1);
+
+            n1[0] = cos(theta2) * (cos(phi1));
+            n1[1] = -sin(theta2) * (cos(phi1));
+            n1[2] = sin(phi1);
+
+            n2[0] = cos(theta2) * (cos(phi2));
+            n2[1] = -sin(theta2) * (cos(phi2));
+            n2[2] = sin(phi2);
+
+            n3[0] = cos(theta1) * (cos(phi2));
+            n3[1] = -sin(theta1) * (cos(phi2));
+            n3[2] = sin(phi2);
+
+            t0[0] = v0[0]*scalFac + 0.5;
+            t0[1] = v0[1]*scalFac + 0.5;
+            t0[2] = v0[2]*scalFac + 0.5;
+
+            t1[0] = v1[0]*scalFac + 0.5;
+            t1[1] = v1[1]*scalFac + 0.5;
+            t1[2] = v1[2]*scalFac + 0.5;
+
+            t2[0] = v2[0]*scalFac + 0.5;
+            t2[1] = v2[1]*scalFac + 0.5;
+            t2[2] = v2[2]*scalFac + 0.5;
+
+            t3[0] = v3[0]*scalFac + 0.5;
+            t3[1] = v3[1]*scalFac + 0.5;
+            t3[2] = v3[2]*scalFac + 0.5;
+
+	    // Create blue-black checkered coloring
+	    if ( (i+j) % 2 )
+		qglColor( black );
+	    else
+		qglColor( TQColor( "steelblue" ) );
+
+            glBegin(GL_POLYGON);
+                glNormal3fv(n3); glTexCoord3fv(t3); glVertex3fv(v3);
+                glNormal3fv(n2); glTexCoord3fv(t2); glVertex3fv(v2);
+                glNormal3fv(n1); glTexCoord3fv(t1); glVertex3fv(v1);
+                glNormal3fv(n0); glTexCoord3fv(t0); glVertex3fv(v0);
+            glEnd();
+        }
+    }
+    glEndList();
+
+    return list;
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the X axis.
+*/
+
+void GLBox::setXRotation( int degrees )
+{
+    xRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Y axis.
+*/
+
+void GLBox::setYRotation( int degrees )
+{
+    yRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Z axis.
+*/
+
+void GLBox::setZRotation( int degrees )
+{
+    zRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+
+
+/*!
+  Sets the rotation angles of this object to that of \a fromBox
+*/
+
+void GLBox::copyRotation( const GLBox& fromBox )
+{
+    xRot = fromBox.xRot;
+    yRot = fromBox.yRot;
+    zRot = fromBox.zRot;
+}
diff --git a/examples/opengl/glpixmap/glbox.h b/examples/opengl/glpixmap/glbox.h
new file mode 100644
index 000000000..0b58cda0b
--- /dev/null
+++ b/examples/opengl/glpixmap/glbox.h
@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget displaying a box
+**
+****************************************************************************/
+
+#ifndef GLBOX_H
+#define GLBOX_H
+
+#include <qgl.h>
+
+
+class GLBox : public TQGLWidget
+{
+    Q_OBJECT
+
+public:
+
+    GLBox( TQWidget* parent, const char* name, const TQGLWidget* shareWidget=0 );
+    GLBox( const TQGLFormat& format, TQWidget* parent, const char* name, 
+	   const TQGLWidget* shareWidget=0 );
+    ~GLBox();
+
+    void		copyRotation( const GLBox& fromBox );
+
+public slots:
+
+    void		setXRotation( int degrees );
+    void		setYRotation( int degrees );
+    void		setZRotation( int degrees );
+
+protected:
+
+    void		initializeGL();
+    void		paintGL();
+    void		resizeGL( int w, int h );
+
+    virtual GLuint 	makeObject();
+
+private:
+
+    GLuint object;
+
+    GLfloat	xRot, yRot, zRot, scale;
+
+};
+
+
+#endif // GLBOX_H
diff --git a/examples/opengl/glpixmap/globjwin.cpp b/examples/opengl/glpixmap/globjwin.cpp
new file mode 100644
index 000000000..6341c3e07
--- /dev/null
+++ b/examples/opengl/glpixmap/globjwin.cpp
@@ -0,0 +1,214 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** Implementation of GLObjectWindow widget class
+**
+****************************************************************************/
+
+
+#include <qpushbutton.h>
+#include <qslider.h>
+#include <qlayout.h>
+#include <qframe.h>
+#include <qlabel.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qapplication.h>
+#include <qkeycode.h>
+#include <qpixmap.h>
+#include <qimage.h>
+#include <qpainter.h>
+#include "globjwin.h"
+#include "glbox.h"
+
+
+GLObjectWindow::GLObjectWindow( TQWidget* parent, const char* name )
+    : TQWidget( parent, name )
+{
+    // Create a menu
+    file = new TQPopupMenu( this );
+    file->setCheckable( TRUE );
+    file->insertItem( "Grab Frame Buffer", this, SLOT(grabFrameBuffer()) );
+    file->insertItem( "Render Pixmap", this, SLOT(makePixmap()) );
+    file->insertItem( "Render Pixmap Hidden", this, SLOT(makePixmapHidden()) );
+    file->insertSeparator();
+    fixMenuItemId = file->insertItem( "Use Fixed Pixmap Size", this, 
+				      SLOT(useFixedPixmapSize()) );
+    file->insertSeparator();
+    insertMenuItemId = file->insertItem( "Insert Pixmap Here", this, 
+					 SLOT(makePixmapForMenu()) );
+    file->insertSeparator();
+    file->insertItem( "Exit",  qApp, SLOT(tquit()), CTRL+Key_Q );
+
+    // Create a menu bar
+    TQMenuBar *m = new TQMenuBar( this );
+    m->setSeparator( TQMenuBar::InWindowsStyle );
+    m->insertItem("&File", file );
+
+    // Create nice frames to put around the OpenGL widgets
+    TQFrame* f1 = new TQFrame( this, "frame1" );
+    f1->setFrameStyle( TQFrame::Sunken | TQFrame::Panel );
+    f1->setLineWidth( 2 );
+
+    // Create an OpenGL widget
+    c1 = new GLBox( f1, "glbox1");
+
+    // Create a label that can display the pixmap
+    lb = new TQLabel( this, "pixlabel" );
+    lb->setFrameStyle( TQFrame::Sunken | TQFrame::Panel );
+    lb->setLineWidth( 2 );
+    lb->setAlignment( AlignCenter );
+    lb->setMargin( 0 );
+    lb->setIndent( 0 );
+
+    // Create the three sliders; one for each rotation axis
+    TQSlider* x = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "xsl" );
+    x->setTickmarks( TQSlider::Left );
+    connect( x, SIGNAL(valueChanged(int)), c1, SLOT(setXRotation(int)) );
+
+    TQSlider* y = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "ysl" );
+    y->setTickmarks( TQSlider::Left );
+    connect( y, SIGNAL(valueChanged(int)), c1, SLOT(setYRotation(int)) );
+
+    TQSlider* z = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "zsl" );
+    z->setTickmarks( TQSlider::Left );
+    connect( z, SIGNAL(valueChanged(int)), c1, SLOT(setZRotation(int)) );
+
+
+    // Now that we have all the widgets, put them into a nice layout
+
+    // Put the sliders on top of each other
+    TQVBoxLayout* vlayout = new TQVBoxLayout( 20, "vlayout");
+    vlayout->addWidget( x );
+    vlayout->addWidget( y );
+    vlayout->addWidget( z );
+
+    // Put the GL widget inside the frame
+    TQHBoxLayout* flayout1 = new TQHBoxLayout( f1, 2, 2, "flayout1");
+    flayout1->addWidget( c1, 1 );
+
+    // Top level layout, puts the sliders to the left of the frame/GL widget
+    TQHBoxLayout* hlayout = new TQHBoxLayout( this, 20, 20, "hlayout");
+    hlayout->setMenuBar( m );
+    hlayout->addLayout( vlayout );
+    hlayout->addWidget( f1, 1 );
+    hlayout->addWidget( lb, 1 );
+
+}
+
+
+
+void GLObjectWindow::grabFrameBuffer()
+{
+    TQImage img = c1->grabFrameBuffer();
+
+    // Convert image to pixmap so we can show it
+    TQPixmap pm;
+    pm.convertFromImage( img, AvoidDither );
+    drawOnPixmap( &pm );
+    lb->setPixmap( pm );
+}
+
+
+
+void GLObjectWindow::makePixmap()
+{
+    // Make a pixmap to to be rendered by the gl widget
+    TQPixmap pm;
+
+    // Render the pixmap, with either c1's size or the fixed size pmSz
+    if ( pmSz.isValid() )
+	pm = c1->renderPixmap( pmSz.width(), pmSz.height() );
+    else 
+	pm = c1->renderPixmap();
+
+    if ( !pm.isNull() ) {
+	// Present the pixmap to the user
+	drawOnPixmap( &pm );
+	lb->setPixmap( pm );
+    }
+    else {
+	lb->setText( "Failed to render Pixmap." );
+    }
+}
+
+
+void GLObjectWindow::makePixmapHidden()
+{
+    // Make a TQGLWidget to draw the pixmap. This widget will not be shown.
+    GLBox* w = new GLBox( this, "temporary glwidget", c1 );
+
+    bool success = FALSE;
+    TQPixmap pm;
+
+    if ( w->isValid() ) {
+	// Set the current rotation
+	w->copyRotation( *c1 );
+
+	// Determine wanted pixmap size
+	TQSize sz = pmSz.isValid() ? pmSz : c1->size();
+
+	// Make our hidden glwidget render the pixmap
+	pm = w->renderPixmap( sz.width(), sz.height() );
+
+	if ( !pm.isNull() )
+	    success = TRUE;
+    }
+
+    if ( success ) {
+	// Present the pixmap to the user
+	drawOnPixmap( &pm );
+	lb->setPixmap( pm );
+    }
+    else {
+	lb->setText( "Failed to render Pixmap." );
+    }
+    delete w;
+}
+
+
+void GLObjectWindow::drawOnPixmap( TQPixmap* pm )
+{
+    // Draw some text on the pixmap to differentiate it from the GL window
+
+    if ( pm->isNull() ) {
+	qWarning("Cannot draw on null pixmap");
+	return;
+    }
+    else {
+	TQPainter p( pm );
+       p.setFont( TQFont( "Helvetica", 18 ) );
+	p.setPen( white );
+	p.drawText( pm->rect(), AlignCenter, "This is a Pixmap" );
+    }
+}
+
+
+
+void GLObjectWindow::useFixedPixmapSize()
+{
+    if ( pmSz.isValid() ) {
+	pmSz = TQSize();
+	file->setItemChecked( fixMenuItemId, FALSE );
+    }
+    else {
+	pmSz = TQSize( 200, 200 );
+	file->setItemChecked( fixMenuItemId, TRUE );
+    }
+}
+
+
+void GLObjectWindow::makePixmapForMenu()
+{
+    TQPixmap pm = c1->renderPixmap( 32, 32 );
+    if ( !pm.isNull() )
+	file->changeItem( pm, "Insert Pixmap Here", insertMenuItemId );
+}
diff --git a/examples/opengl/glpixmap/globjwin.h b/examples/opengl/glpixmap/globjwin.h
new file mode 100644
index 000000000..b02ed67eb
--- /dev/null
+++ b/examples/opengl/glpixmap/globjwin.h
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** The GLObjectWindow contains a GLBox and three sliders connected to
+** the GLBox's rotation slots.
+**
+****************************************************************************/
+
+#ifndef GLOBJWIN_H
+#define GLOBJWIN_H
+
+#include <qwidget.h>
+
+class GLBox;
+class TQLabel;
+class TQPopupMenu;
+
+class GLObjectWindow : public TQWidget
+{
+    Q_OBJECT
+public:
+    GLObjectWindow( TQWidget* parent = 0, const char* name = 0 );
+
+protected slots:
+
+    void		grabFrameBuffer();
+    void		makePixmap();
+    void		makePixmapHidden();
+    void		makePixmapForMenu();
+    void		useFixedPixmapSize();
+
+private:
+    void		drawOnPixmap( TQPixmap* pm );
+    GLBox* c1;
+    TQLabel* lb;
+    int fixMenuItemId;
+    int insertMenuItemId;
+    TQSize pmSz;
+    TQPopupMenu* file;
+};
+
+
+#endif // GLOBJWIN_H
diff --git a/examples/opengl/glpixmap/glpixmap.doc b/examples/opengl/glpixmap/glpixmap.doc
new file mode 100644
index 000000000..840607682
--- /dev/null
+++ b/examples/opengl/glpixmap/glpixmap.doc
@@ -0,0 +1,14 @@
+/*!   \page opengl-pixmap-example.html
+
+  \ingroup opengl-examples
+  \title OpenGL Pixmap Example
+
+This example program is an extension of the \link
+opengl-box-example.html OpenGL Box example\endlink.
+
+It demonstrates how to render OpenGL into a QPixmap.
+
+See \c{$QTDIR/examples/opengl/glpixmap} for the source code.
+
+*/
+
diff --git a/examples/opengl/glpixmap/glpixmap.pro b/examples/opengl/glpixmap/glpixmap.pro
new file mode 100644
index 000000000..597f94c2f
--- /dev/null
+++ b/examples/opengl/glpixmap/glpixmap.pro
@@ -0,0 +1,15 @@
+TEMPLATE	= app
+TARGET		= glpixmap
+
+CONFIG		+= qt opengl warn_on release
+CONFIG -= dlopen_opengl
+!mac:unix:LIBS  += -lm
+DEPENDPATH	= ../include
+
+REQUIRES         = opengl
+
+HEADERS		= glbox.h \
+		  globjwin.h
+SOURCES		= glbox.cpp \
+		  globjwin.cpp \
+		  main.cpp
diff --git a/examples/opengl/glpixmap/main.cpp b/examples/opengl/glpixmap/main.cpp
new file mode 100644
index 000000000..13e474007
--- /dev/null
+++ b/examples/opengl/glpixmap/main.cpp
@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// TQt OpenGL example: Shared Box
+//
+// A small example showing how to use OpenGL display list sharing
+// 
+// File: main.cpp
+//
+// The main() function 
+// 
+
+#include "globjwin.h"
+#include <qapplication.h>
+#include <qgl.h>
+
+/*
+  The main program is here. 
+*/
+
+int main( int argc, char **argv )
+{
+    TQApplication::setColorSpec( TQApplication::CustomColor );
+    TQApplication a(argc,argv);			
+
+    if ( !TQGLFormat::hasOpenGL() ) {
+	qWarning( "This system has no OpenGL support. Exiting." );
+	return -1;
+    }
+
+    GLObjectWindow w;
+    w.resize( 550, 350 );
+    a.setMainWidget( &w );
+    w.show();
+    return a.exec();
+}
diff --git a/examples/opengl/overlay/README b/examples/opengl/overlay/README
new file mode 100644
index 000000000..f08e539d2
--- /dev/null
+++ b/examples/opengl/overlay/README
@@ -0,0 +1,9 @@
+
+The overlay example
+
+This example program shows how to use OpenGL overlays with the Qt OpenGL
+Extension. It contains a QGLWidget with a relatively expensive
+redrawing operation, and rubber-band drawing in the overlay plane.
+Using the overlay has the advantage that the rubber-band may be drawn
+and erased without damaging the image in the main plane, so costly
+redraws are avoided.
diff --git a/examples/opengl/overlay/globjwin.cpp b/examples/opengl/overlay/globjwin.cpp
new file mode 100644
index 000000000..fd5545512
--- /dev/null
+++ b/examples/opengl/overlay/globjwin.cpp
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qlayout.h>
+#include <qframe.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qapplication.h>
+#include <qmessagebox.h>
+#include "globjwin.h"
+#include "glteapots.h"
+
+
+GLObjectWindow::GLObjectWindow( TQWidget* parent, const char* name )
+    : TQWidget( parent, name )
+{
+    // Create a menu
+    TQPopupMenu *file = new TQPopupMenu( this );
+    file->insertItem( "Exit",  qApp, SLOT(tquit()), CTRL+Key_Q );
+
+    // Create a menu bar
+    TQMenuBar *m = new TQMenuBar( this );
+    m->setSeparator( TQMenuBar::InWindowsStyle );
+    m->insertItem("&File", file );
+
+    // Create a nice frame to put around the OpenGL widget
+    TQFrame* f = new TQFrame( this, "frame" );
+    f->setFrameStyle( TQFrame::Sunken | TQFrame::Panel );
+    f->setLineWidth( 2 );
+
+    // Create our OpenGL widget.
+    GLTeapots* c = new GLTeapots( f, "glteapots" );
+
+    // Check if we obtained an overlay
+    if ( !c->format().hasOverlay() ) {
+	TQMessageBox::warning( 0, qApp->argv()[0], 
+			      "Failed to get an OpenGL overlay",
+			      "OK" );
+    }
+
+    // Now that we have all the widgets, put them into a nice layout
+
+    // Put the GL widget inside the frame
+    TQHBoxLayout* flayout = new TQHBoxLayout( f, 2, 2, "flayout");
+    flayout->addWidget( c, 1 );
+
+    // Top level layout
+    TQVBoxLayout* hlayout = new TQVBoxLayout( this, 20, 20, "hlayout");
+    hlayout->setMenuBar( m );
+    hlayout->addWidget( f, 1 );
+}
diff --git a/examples/opengl/overlay/globjwin.h b/examples/opengl/overlay/globjwin.h
new file mode 100644
index 000000000..ede00a35c
--- /dev/null
+++ b/examples/opengl/overlay/globjwin.h
@@ -0,0 +1,33 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** The GLObjectWindow contains a GLBox and three sliders connected to
+** the GLBox's rotation slots.
+**
+****************************************************************************/
+
+#ifndef GLOBJWIN_H
+#define GLOBJWIN_H
+
+#include <qwidget.h>
+
+
+class GLObjectWindow : public TQWidget
+{
+    Q_OBJECT
+public:
+    GLObjectWindow( TQWidget* parent = 0, const char* name = 0 );
+
+
+};
+
+
+#endif // GLOBJWIN_H
diff --git a/examples/opengl/overlay/glteapots.cpp b/examples/opengl/overlay/glteapots.cpp
new file mode 100644
index 000000000..7aff716de
--- /dev/null
+++ b/examples/opengl/overlay/glteapots.cpp
@@ -0,0 +1,457 @@
+/****************************************************************************
+**
+** Implementation of GLTeapots
+** This is a TQGLWidget displaying a group of teapots and a rubber-band
+** in an overlay plane
+**
+** The OpenGL code in this example is mostly borrowed from the "teapots"
+** example program in the "OpenGL Programming Guide", by Jackie Neider,
+** Tom Davis, and Mason Woo, Addison Wesley 1993.
+** It can be obtained from ftp.sgi.com and contains the following copyright
+** notice:
+
+ * (c) Copyright 1993, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED 
+ * Permission to use, copy, modify, and distribute this software for 
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that 
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission. 
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSETQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ * 
+ * US Government Users Restricted Rights 
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States.  Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+
+****************************************************************************/
+
+#include "glteapots.h"
+#include <qapplication.h>
+
+#if defined(Q_CC_MSVC)
+#pragma warning(disable:4305) // init: truncation from const double to float
+#endif
+
+/*!
+  Create a GLTeapots widget.
+
+  Specifies the following frame buffer retquirements to the TQGLWidget
+  constructor:
+  <ul>
+  <li> HasOverlay - we want an overlay context to draw the rubber-band in
+  <li> SingleBuffer - makes the drawing process of the teapots visible
+  </ul>
+*/
+
+
+GLTeapots::GLTeapots( TQWidget* parent, const char* name )
+    : TQGLWidget( TQGLFormat( TQGL::SingleBuffer | TQGL::HasOverlay ),
+		 parent, name )
+{
+    teapotList = 0;
+    rubberOn = FALSE;
+}
+
+/*!
+  Release allocated resources
+*/
+
+GLTeapots::~GLTeapots()
+{
+    makeCurrent();
+    glDeleteLists( teapotList, 1 );
+}
+
+
+/*!
+  Do the main plane painting: a set of teapots.
+*/
+
+void GLTeapots::paintGL()
+{
+    TQApplication::setOverrideCursor( waitCursor ); // Since it takes some time
+
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    renderTeapot( 2.0, 17.0, 0.0215, 0.1745, 0.0215, 
+		  0.07568, 0.61424, 0.07568,
+		  0.633, 0.727811, 0.633, 0.6 );
+    renderTeapot( 2.0, 14.0, 0.135, 0.2225, 0.1575,
+		  0.54, 0.89, 0.63, 0.316228,
+		  0.316228, 0.316228, 0.1 );
+    renderTeapot( 2.0, 11.0, 0.05375, 0.05, 0.06625,
+		  0.18275, 0.17, 0.22525,
+		  0.332741, 0.328634, 0.346435, 0.3 );
+    renderTeapot( 2.0, 8.0, 0.25, 0.20725, 0.20725,
+		  1, 0.829, 0.829, 0.296648,
+		  0.296648, 0.296648, 0.088 );
+    renderTeapot( 2.0, 5.0, 0.1745, 0.01175, 0.01175,
+		  0.61424, 0.04136, 0.04136,
+		  0.727811, 0.626959, 0.626959, 0.6);
+    renderTeapot( 2.0, 2.0, 0.1, 0.18725, 0.1745,
+		  0.396, 0.74151, 0.69102,
+		  0.297254, 0.30829, 0.306678, 0.1 );
+
+    renderTeapot( 6.0, 17.0, 0.329412, 0.223529, 0.027451,
+		  0.780392, 0.568627, 0.113725,
+		  0.992157, 0.941176, 0.807843, 0.21794872 );
+    renderTeapot( 6.0, 14.0, 0.2125, 0.1275, 0.054,
+		  0.714, 0.4284, 0.18144,
+		  0.393548, 0.271906, 0.166721, 0.2 );
+    renderTeapot( 6.0, 11.0, 0.25, 0.25, 0.25, 
+		  0.4, 0.4, 0.4,
+		  0.774597, 0.774597, 0.774597, 0.6 );
+    renderTeapot( 6.0, 8.0, 0.19125, 0.0735, 0.0225,
+		  0.7038, 0.27048, 0.0828,
+		  0.256777, 0.137622, 0.086014, 0.1 );
+    renderTeapot( 6.0, 5.0, 0.24725, 0.1995, 0.0745,
+		  0.75164, 0.60648, 0.22648,
+		  0.628281, 0.555802, 0.366065, 0.4 );
+    renderTeapot( 6.0, 2.0, 0.19225, 0.19225, 0.19225,
+		  0.50754, 0.50754, 0.50754,
+		  0.508273, 0.508273, 0.508273, 0.4 );
+
+    renderTeapot( 10.0, 17.0, 0.0, 0.0, 0.0,
+		  0.01, 0.01, 0.01,
+		  0.50, 0.50, 0.50, .25 );
+    renderTeapot( 10.0, 14.0, 0.0, 0.1, 0.06,
+		  0.0, 0.50980392, 0.50980392,
+		  0.50196078, 0.50196078, 0.50196078, .25 );
+    renderTeapot( 10.0, 11.0, 0.0, 0.0, 0.0, 
+		  0.1, 0.35, 0.1,
+		  0.45, 0.55, 0.45, .25 );
+    renderTeapot( 10.0, 8.0, 0.0, 0.0, 0.0,
+		  0.5, 0.0, 0.0,
+		  0.7, 0.6, 0.6, .25 );
+    renderTeapot( 10.0, 5.0, 0.0, 0.0, 0.0,
+		  0.55, 0.55, 0.55,
+		  0.70, 0.70, 0.70, .25 );
+    renderTeapot( 10.0, 2.0, 0.0, 0.0, 0.0,
+		  0.5, 0.5, 0.0,
+		  0.60, 0.60, 0.50, .25 );
+
+    renderTeapot( 14.0, 17.0, 0.02, 0.02, 0.02,
+		  0.01, 0.01, 0.01,
+		  0.4, 0.4, 0.4, .078125 );
+    renderTeapot( 14.0, 14.0, 0.0, 0.05, 0.05,
+		  0.4, 0.5, 0.5,
+		  0.04, 0.7, 0.7, .078125 );
+    renderTeapot( 14.0, 11.0, 0.0, 0.05, 0.0,
+		  0.4, 0.5, 0.4,
+		  0.04, 0.7, 0.04, .078125 );
+    renderTeapot( 14.0, 8.0, 0.05, 0.0, 0.0,
+		  0.5, 0.4, 0.4,
+		  0.7, 0.04, 0.04, .078125 );
+    renderTeapot( 14.0, 5.0, 0.05, 0.05, 0.05,
+		  0.5, 0.5, 0.5,
+		  0.7, 0.7, 0.7, .078125 );
+    renderTeapot( 14.0, 2.0, 0.05, 0.05, 0.0,
+		  0.5, 0.5, 0.4, 
+		  0.7, 0.7, 0.04, .078125 );
+
+    // May add a glFinish() here to make sure the GL rendering has finished
+    // before the mouse cursor is reset from "waiting" to normal.
+    TQApplication::restoreOverrideCursor();
+}
+
+
+/*!
+  Set up the OpenGL rendering state of the main plane
+*/
+
+void GLTeapots::initializeGL()
+{
+    GLfloat ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+    GLfloat diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+    GLfloat position[] = { 0.0, 3.0, 3.0, 0.0 };
+    
+    GLfloat lmodel_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
+    GLfloat local_view[] = { 0.0 };
+
+    glLightfv( GL_LIGHT0, GL_AMBIENT, ambient );
+    glLightfv( GL_LIGHT0, GL_DIFFUSE, diffuse );
+    glLightfv( GL_LIGHT0, GL_POSITION, position );
+    glLightModelfv( GL_LIGHT_MODEL_AMBIENT, lmodel_ambient );
+    glLightModelfv( GL_LIGHT_MODEL_LOCAL_VIEWER, local_view );
+
+    glFrontFace( GL_CW );
+    glEnable( GL_LIGHTING );
+    glEnable( GL_LIGHT0 );
+    glEnable( GL_AUTO_NORMAL );
+    glEnable( GL_NORMALIZE );
+    glEnable( GL_DEPTH_TEST );
+    glDepthFunc( GL_LESS );
+}
+
+
+
+/*!
+  Set up the main plane's view port, matrix mode, etc. suitably for
+  viewing the teapots.
+*/
+
+void GLTeapots::resizeGL( int w, int h )
+{
+    glViewport(0, 0, w, h);
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    if ( w <= h )
+	glOrtho( 0.0, 20.0, 0.0, 20.0*(GLfloat)h/(GLfloat)w, -10.0, 10.0 );
+    else
+	glOrtho( 0.0, 20.0*(GLfloat)w/(GLfloat)h, 0.0, 20.0, -10.0, 10.0 );
+    glMatrixMode(GL_MODELVIEW);
+}
+
+
+/*!
+  Set up the OpenGL rendering state of the overlay plane
+*/
+
+void GLTeapots::initializeOverlayGL()
+{
+    glLineWidth( 2 );
+    glLineStipple( 3, 0xAAAA );
+    glEnable( GL_LINE_STIPPLE );
+}
+
+
+/*!
+  Do the overlay plane painting: a rubber-band (if the user has
+  dragged out one).
+
+*/
+
+void GLTeapots::paintOverlayGL()
+{
+    glClear( GL_COLOR_BUFFER_BIT );
+    if ( rubberOn ) {
+	qglColor( TQColor( 255, 255, 0 ) );
+	glBegin( GL_LINE_LOOP );
+	glVertex2i( rubberP1.x(), rubberP1.y() );
+	glVertex2i( rubberP2.x(), rubberP1.y() );
+	glVertex2i( rubberP2.x(), rubberP2.y() );
+	glVertex2i( rubberP1.x(), rubberP2.y() );
+	glEnd();
+    }
+}
+
+
+/*!
+  Set up the overlay plane's view port, matrix mode, etc. suitably for
+  viewing the rubber-band.
+*/
+
+void GLTeapots::resizeOverlayGL( int w, int h )
+{
+    glViewport( 0, 0, w, h );
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    gluOrtho2D( 0, w, h, 0 );
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+}
+
+
+/*!
+  User presses a mouse button: start pulling out a rubber-band rectangle
+*/
+
+// We do a simple rubber-band drawing here; erasing the whole overlay
+// plane for each repaint. For less flickering of the rubber-band
+// itself, we could remember the coordinates of the last rectangle
+// drawn, and then erase only that by painting it again with
+// transparent color.
+
+void GLTeapots::mousePressEvent( TQMouseEvent* e )
+{
+    rubberP1 = e->pos();
+    rubberP2 = rubberP1;
+    rubberOn = TRUE;
+}
+
+/*!
+  User drags the mouse: Update the rubber-band coordinates and repaint
+  the overlay.
+*/
+
+void GLTeapots::mouseMoveEvent( TQMouseEvent* e )
+{
+    if ( rubberOn ) {
+	rubberP2 = e->pos();
+	updateOverlayGL();
+    }
+}
+
+/*!
+  User releases the mouse button: remove the rubber-band.
+*/
+
+void GLTeapots::mouseReleaseEvent( TQMouseEvent* )
+{
+    if ( rubberOn ) {
+	rubberOn = FALSE;
+	updateOverlayGL();
+    }
+}
+
+
+/*!
+  Renders a teapot with the given material properties
+*/
+
+void GLTeapots::renderTeapot( GLfloat x, GLfloat y, GLfloat ambr,
+			  GLfloat ambg, GLfloat ambb, GLfloat difr,
+			  GLfloat difg, GLfloat difb, 
+			  GLfloat specr, GLfloat specg, 
+			  GLfloat specb, GLfloat shine )
+{
+    float mat[4];
+
+    glPushMatrix();
+    glTranslatef (x, y, 0.0);
+    mat[0] = ambr; mat[1] = ambg; mat[2] = ambb; mat[3] = 1.0;	
+    glMaterialfv (GL_FRONT, GL_AMBIENT, mat);
+    mat[0] = difr; mat[1] = difg; mat[2] = difb;	
+    glMaterialfv (GL_FRONT, GL_DIFFUSE, mat);
+    mat[0] = specr; mat[1] = specg; mat[2] = specb;
+    glMaterialfv (GL_FRONT, GL_SPECULAR, mat);
+    glMaterialf (GL_FRONT, GL_SHININESS, shine*128.0);
+    teapot();
+    glPopMatrix();
+}
+
+
+/*!
+  Draw a classic OpenGL teapot
+*/
+
+void GLTeapots::teapot()
+{
+    static long patchdata[][16] = {
+	{102,103,104,105,4,5,6,7,8,9,10,11,12,13,14,15},
+	{12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27},
+	{24,25,26,27,29,30,31,32,33,34,35,36,37,38,39,40},
+	{96,96,96,96,97,98,99,100,101,101,101,101,0,1,2,3,},
+	{0,1,2,3,106,107,108,109,110,111,112,113,114,115,116,117},
+	{118,118,118,118,124,122,119,121,123,126,125,120,40,39,38,37},
+	{41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56},
+	{53,54,55,56,57,58,59,60,61,62,63,64,28,65,66,67},
+	{68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83},
+	{80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95}
+    };
+
+    static float cpdata[][3] = {
+	{0.2,0,2.7},{0.2,-0.112,2.7},{0.112,-0.2,2.7},{0,-0.2,2.7},
+	{1.3375,0,2.53125},{1.3375,-0.749,2.53125},{0.749,-1.3375,2.53125},
+	{0,-1.3375,2.53125},{1.4375,0,2.53125},{1.4375,-0.805,2.53125},
+	{0.805,-1.4375,2.53125},{0,-1.4375,2.53125},{1.5,0,2.4},
+	{1.5,-0.84,2.4},{0.84,-1.5,2.4},{0,-1.5,2.4},{1.75,0,1.875},
+	{1.75,-0.98,1.875},{0.98,-1.75,1.875},{0,-1.75,1.875},{2,0,1.35},
+	{2,-1.12,1.35},{1.12,-2,1.35},{0,-2,1.35},{2,0,0.9},{2,-1.12,0.9},
+	{1.12,-2,0.9},{0,-2,0.9},{-2,0,0.9},{2,0,0.45},{2,-1.12,0.45},
+	{1.12,-2,0.45},{0,-2,0.45},{1.5,0,0.225},{1.5,-0.84,0.225},
+	{0.84,-1.5,0.225},{0,-1.5,0.225},{1.5,0,0.15},{1.5,-0.84,0.15},
+	{0.84,-1.5,0.15},{0,-1.5,0.15},{-1.6,0,2.025},{-1.6,-0.3,2.025},
+	{-1.5,-0.3,2.25},{-1.5,0,2.25},{-2.3,0,2.025},{-2.3,-0.3,2.025},
+	{-2.5,-0.3,2.25},{-2.5,0,2.25},{-2.7,0,2.025},{-2.7,-0.3,2.025},
+	{-3,-0.3,2.25},{-3,0,2.25},{-2.7,0,1.8},{-2.7,-0.3,1.8},{-3,-0.3,1.8},
+	{-3,0,1.8},{-2.7,0,1.575},{-2.7,-0.3,1.575},{-3,-0.3,1.35},{-3,0,1.35},
+	{-2.5,0,1.125},{-2.5,-0.3,1.125},{-2.65,-0.3,0.9375},{-2.65,0,0.9375},
+	{-2,-0.3,0.9},{-1.9,-0.3,0.6},{-1.9,0,0.6},{1.7,0,1.425},
+	{1.7,-0.66,1.425},{1.7,-0.66,0.6},{1.7,0,0.6},{2.6,0,1.425},
+	{2.6,-0.66,1.425},{3.1,-0.66,0.825},{3.1,0,0.825},{2.3,0,2.1},
+	{2.3,-0.25,2.1},{2.4,-0.25,2.025},{2.4,0,2.025},{2.7,0,2.4},
+	{2.7,-0.25,2.4},{3.3,-0.25,2.4},{3.3,0,2.4},{2.8,0,2.475},
+	{2.8,-0.25,2.475},{3.525,-0.25,2.49375},{3.525,0,2.49375},
+	{2.9,0,2.475},{2.9,-0.15,2.475},{3.45,-0.15,2.5125},{3.45,0,2.5125},
+	{2.8,0,2.4},{2.8,-0.15,2.4},{3.2,-0.15,2.4},{3.2,0,2.4},{0,0,3.15},
+	{0.8,0,3.15},{0.8,-0.45,3.15},{0.45,-0.8,3.15},{0,-0.8,3.15},
+	{0,0,2.85},{1.4,0,2.4},{1.4,-0.784,2.4},{0.784,-1.4,2.4},{0,-1.4,2.4},
+	{0.4,0,2.55},{0.4,-0.224,2.55},{0.224,-0.4,2.55},{0,-0.4,2.55},
+	{1.3,0,2.55},{1.3,-0.728,2.55},{0.728,-1.3,2.55},{0,-1.3,2.55},
+	{1.3,0,2.4},{1.3,-0.728,2.4},{0.728,-1.3,2.4},{0,-1.3,2.4},{0,0,0},
+	{1.425,-0.798,0},{1.5,0,0.075},{1.425,0,0},{0.798,-1.425,0},
+	{0,-1.5,0.075},{0,-1.425,0},{1.5,-0.84,0.075},{0.84,-1.5,0.075}
+    };
+
+    static float tex[2][2][2] = {{{0, 0},{1, 0}},{{0, 1},{1, 1}}};
+
+    if ( !glIsList( teapotList ) ) {
+	float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
+	long grid = 14;
+	
+	teapotList = glGenLists( 1 );
+	glNewList( teapotList, GL_COMPILE );
+	glPushMatrix();
+	glRotatef( 270.0, 1.0, 0.0, 0.0 );
+	glScalef( 0.5, 0.5, 0.5 );
+	glTranslatef( 0.0, 0.0, -1.5 );
+	for ( long i = 0; i < 10; i++ ) {
+	    for ( long j = 0; j < 4; j++ ) {
+		for ( long k = 0; k < 4; k++ ) {
+		    for ( long l = 0; l < 3; l++ ) {
+			p[j][k][l] = cpdata[patchdata[i][j*4+k]][l];
+			q[j][k][l] = cpdata[patchdata[i][j*4+(3-k)]][l];
+			if ( l == 1 ) 
+			    q[j][k][l] *= -1.0;
+			if ( i < 6 ) {
+			    r[j][k][l] = cpdata[patchdata[i][j*4+(3-k)]][l];
+			    if ( l == 0 )
+				r[j][k][l] *= -1.0;
+			    s[j][k][l] = cpdata[patchdata[i][j*4+k]][l];
+			    if ( l == 0 )
+				s[j][k][l] *= -1.0;
+			    if ( l == 1 )
+				s[j][k][l] *= -1.0;
+			}
+		    }
+		}
+	    }
+	    glMap2f( GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2, 
+		    &tex[0][0][0] );
+	    glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &p[0][0][0] );
+	    glEnable( GL_MAP2_VERTEX_3);
+	    glEnable(GL_MAP2_TEXTURE_COORD_2 );
+	    glMapGrid2f( grid, 0.0, 1.0, grid, 0.0, 1.0 );
+	    glEvalMesh2( GL_LINE, 0, grid, 0, grid );
+	    glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &q[0][0][0] );
+	    glEvalMesh2( GL_LINE, 0, grid, 0, grid );
+	    if ( i < 6 ) {
+		glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
+			 &r[0][0][0]);
+		glEvalMesh2( GL_LINE, 0, grid, 0, grid );
+		glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
+			 &s[0][0][0] );
+		glEvalMesh2( GL_LINE, 0, grid, 0, grid );
+	    }
+	}
+	glDisable(GL_MAP2_VERTEX_3);
+	glDisable(GL_MAP2_TEXTURE_COORD_2);
+	glPopMatrix();
+	glEndList();
+    }
+
+    glCallList( teapotList );
+}
diff --git a/examples/opengl/overlay/glteapots.h b/examples/opengl/overlay/glteapots.h
new file mode 100644
index 000000000..4fbec9b83
--- /dev/null
+++ b/examples/opengl/overlay/glteapots.h
@@ -0,0 +1,62 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a TQGLWidget displaying a group of teapots and a rubber-band
+** in an overlay plane
+**
+****************************************************************************/
+
+#ifndef GLBOX_H
+#define GLBOX_H
+
+#include <qgl.h>
+
+
+class GLTeapots : public TQGLWidget
+{
+    Q_OBJECT
+
+public:
+
+    GLTeapots( TQWidget* parent, const char* name );
+    ~GLTeapots();
+
+protected:
+
+    void		initializeGL();
+    void		paintGL();
+    void		resizeGL( int w, int h );
+
+    void		initializeOverlayGL();
+    void		paintOverlayGL();
+    void		resizeOverlayGL( int w, int h );
+
+    void		mousePressEvent( TQMouseEvent* e );
+    void		mouseMoveEvent( TQMouseEvent* e );
+    void		mouseReleaseEvent( TQMouseEvent* e );
+
+    void		renderTeapot( GLfloat x, GLfloat y, GLfloat ambr,
+				      GLfloat ambg, GLfloat ambb, GLfloat difr,
+				      GLfloat difg, GLfloat difb, 
+				      GLfloat specr, GLfloat specg, 
+				      GLfloat specb, GLfloat shine );
+
+    void		teapot();
+
+private:
+    GLuint teapotList;
+    TQPoint rubberP1;
+    TQPoint rubberP2;
+    bool rubberOn;
+};
+
+
+#endif // GLBOX_H
diff --git a/examples/opengl/overlay/main.cpp b/examples/opengl/overlay/main.cpp
new file mode 100644
index 000000000..3844704fd
--- /dev/null
+++ b/examples/opengl/overlay/main.cpp
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// TQt OpenGL example: Box
+//
+// A small example showing how a GLWidget can be used just as any TQt widget
+// 
+// File: main.cpp
+//
+// The main() function 
+// 
+
+#include "globjwin.h"
+#include <qapplication.h>
+#include <qgl.h>
+#include <qmessagebox.h>
+
+/*
+  The main program is here. 
+*/
+
+int main( int argc, char **argv )
+{
+    TQApplication::setColorSpec( TQApplication::CustomColor );
+    TQApplication a(argc,argv);
+
+    if ( !TQGLFormat::hasOpenGL() ) {
+	qWarning( "This system has no OpenGL support. Exiting." );
+	return -1;
+    }
+
+    // Check for existence of overlays
+    if ( !TQGLFormat::hasOpenGLOverlays() ) {
+	TQMessageBox::critical( 0, qApp->argv()[0], 
+			       "This system does not support OpenGL overlays",
+			       "Exit" );
+	return 1;
+    }
+
+    GLObjectWindow w;
+    w.resize( 400, 350 );
+    a.setMainWidget( &w );
+
+    w.show();
+    return a.exec();
+}
diff --git a/examples/opengl/overlay/overlay.doc b/examples/opengl/overlay/overlay.doc
new file mode 100644
index 000000000..7a10b3cbd
--- /dev/null
+++ b/examples/opengl/overlay/overlay.doc
@@ -0,0 +1,16 @@
+/*!   \page opengl-overlay-example.html
+
+  \ingroup opengl-examples
+  \title OpenGL Overlay Example
+
+This example demonstrates how to use OpenGL overlays with the Qt OpenGL
+Extension. It features a QGLWidget with a relatively expensive redrawing
+operation, and rubber-band drawing in the overlay plane. Using the
+overlay has the advantage that the rubber-band may be drawn and erased
+without damaging the image in the main plane, so costly redraws are
+avoided.
+
+See \c{$QTDIR/examples/opengl/overlay} for the source code.
+
+*/
+
diff --git a/examples/opengl/overlay/overlay.pro b/examples/opengl/overlay/overlay.pro
new file mode 100644
index 000000000..bc0816515
--- /dev/null
+++ b/examples/opengl/overlay/overlay.pro
@@ -0,0 +1,14 @@
+TEMPLATE	= app
+TARGET		= overlay
+
+CONFIG		+= qt opengl warn_on release
+CONFIG -= dlopen_opengl
+DEPENDPATH	= ../include
+
+REQUIRES        = opengl
+
+HEADERS		= glteapots.h \
+		  globjwin.h
+SOURCES		= glteapots.cpp \
+		  globjwin.cpp \
+		  main.cpp
diff --git a/examples/opengl/overlay_x11/README b/examples/opengl/overlay_x11/README
new file mode 100644
index 000000000..eba728e67
--- /dev/null
+++ b/examples/opengl/overlay_x11/README
@@ -0,0 +1,74 @@
+
+-----------------------------------------------------------------------
+UPDATE: From version 5.0 onwards, the Qt OpenGL Extension includes
+direct support for use of OpenGL overlays. For many uses of overlays,
+this makes the technique described below redundant. See the 'overlay'
+example program. The following is a discussion on how to use non-QGL
+widgets in overlay planes.
+-----------------------------------------------------------------------
+
+Overlayrubber: An example program showing how to use Qt and Qt OpenGL
+Extension with X11 overlay visuals.
+
+(Background information for this example can be found in the file
+ README.X11-OVERLAYS)
+
+The example program has three main parts:
+
+GearWidget: A simple QGLWidget that renders the usual gears. Modified
+so that it will print a debug message every time it redraws (renders)
+itself. Thus, you can eaily confirm that drawing in the overlay plane
+does not cause redrawings in the main plane where the QGLWidget
+resides.
+
+RubberbandWidget: Very simple standard (non-GL) Qt widget that
+implements rubberband drawing. Designed for use in an overlay
+plane. It takes the planes' transparent color as a constructor
+argument and uses that for its background color. Thus, the widget
+itself will be invisible, only the rubberbands it draws will be
+visible.
+
+main.cpp: Creates a GearWidget and a Rubberbandwidget and puts the
+latter on top of the former. Contains a routine that checks that the
+default visual is in an overlay plane, and returns the transparent
+color of that plane.
+
+
+Running it:
+-----------
+
+Start the overlayrubber executable. Click and drag with the left mouse
+button to see rubberband drawing. Observe that the QGLWidget does
+not redraw itself (no redraw debug messages are output), and yet the
+image is not destroyed. Marvel at the coolness of X11 overlays!
+
+
+Using this technique in a real application
+------------------------------------------
+
+For clarity, this example program has been kept very simple. Here are
+some hints for real application use:
+
+All normal widgets can go in the overlay plane: This means that you
+can put all kinds of Qt widgets (your own or those provided with Qt)
+on top of the OpenGL image (widget), e.g. pushbuttons etc., and they
+can be moved, resized, or removed without destroying the OpenGL image.
+
+Using with geometry management: The QLayout classes will not allow you
+to put one widget (the overlay) on top of another (the OpenGL widget);
+that would defy the whole purpose of the automatic layout. The
+solution is to add just one of them to the QLayout object. Have it
+keep a pointer to the other (i.e. the QGLWidget knows about its
+overlay widget or vice versa). Implement the resizeEvent() method of
+the widget you put in the layout, and make it call setGeometry() on
+the other widget with its own geometry as parameters, thus keeping the
+two widgets' geometries synchronized.
+
+Using with QPalette and QColorGroup: Instead of the somewhat
+simplistic setBackgroundColor( transparentColor ), you can use Qt's
+QPalette system for having your overlay widgets use transparent color
+for what you want. This way, the normal Qt widgets can be used as
+overlays for fancy effects: just create a palette for them with the
+transparent color for the wanted color roles, e.g. Background and
+Base, in the Normal and/or Active modes. This way, you can create
+see-through QPushButtons etc.
diff --git a/examples/opengl/overlay_x11/README.X11-OVERLAYS b/examples/opengl/overlay_x11/README.X11-OVERLAYS
new file mode 100644
index 000000000..6029ca3eb
--- /dev/null
+++ b/examples/opengl/overlay_x11/README.X11-OVERLAYS
@@ -0,0 +1,92 @@
+
+	 HOW TO USE X11 OVERLAYS WITH THE QT OPENGL EXTENSION
+
+X11 overlays is a powerful mechanism that allows one to draw
+annotations etc. on top of an image without destroying it, thus saving
+significant image rendering time. For more information, consult the
+highly recommended book "OpenGL Programming for the X Window System"
+(Mark Kilgard, Addison Wesley Developers Press 1996).
+
+-----------------------------------------------------------------------
+UPDATE: From version 5.0 onwards, the Qt OpenGL Extension includes
+direct support for use of OpenGL overlays. For many uses of overlays,
+this makes the technique described below redundant. See the 'overlay'
+example program. The following is a discussion on how to use non-QGL
+widgets in overlay planes.
+-----------------------------------------------------------------------
+
+In the typical case, X11 overlays can easily be used together with the
+current version of Qt and the Qt OpenGL Extension. The following
+retquirements apply:
+
+1) Your X server and graphics card/hardware must support overlays (of
+   course). For many X servers, overlay support can be turned on with
+   a configuration option; consult your X server installation
+   documentation.
+
+2) Your X server must (be configured to) use an overlay visual as the
+   default visual. Most modern X servers do this, since this has the
+   added advantage that pop-up menus, overlapping windows etc. will
+   not destroy underlying images in the main plane, saving expensive
+   redraws.
+
+3) The best (deepest) visual for OpenGL rendering is in the main
+   plane. This is the normal case. Typically, X servers that support
+   overlays provide a 24 bit deep TrueColor visuals in the main plane,
+   and an 8 bit PseudoColor (default) visual in the overlay plane.
+
+The provided example program "overlayrubber" will check for all this
+and tell you what is wrong, if anything. See "About X11 Visuals" below
+for more information.
+
+
+How it works:
+-------------
+
+Given the above, a QGLWidget will by default use the main plane
+visual, while all other widgets will use the overlay visual. Thus, one
+can place a normal widget on top of the QGLWidget, and do drawing in
+it, without destroying the image in the OpenGL window. In other words,
+one can use all the drawing capabilities of QPainter to draw the
+annotations, rubberbands, whatever. For the typical use of overlays,
+this is much easier than using OpenGL for rendering the annotations.
+
+An overlay plane has a specific color called the transparent
+color. Pixels drawn in this color will not be visible, instead the
+underlying OpenGL image will show through. In the example program
+"overlayrubber", the file main.cpp contains a routine that returns a
+QColor containing the transparent color. For the overlay widget, one
+will typically want to set the background color to the transparent
+color, so that the OpenGL image shows through except where explicitly
+overpainted.
+
+Note: To use this technique, you must not use the "ManyColor" or
+"TrueColor" ColorSpec for the QApplication, because this will force
+the normal Qt widgets to use a TrueColor visual, which will typically
+be in the main plane, not in the overlay plane as desired.
+
+
+
+About X11 visuals:
+------------------
+
+The utilities directory contains two small programs that can help you
+determine the capabilities of your X server. These programs are from
+the OpenGL book mentioned above, see utilities/NOTICE for copyright
+information. The full set of example programs from this book is
+available at ftp://ftp.sgi.com/pub/opengl/opengl_for_x/
+
+"glxvisuals" will list all the GL-capable visuals the X server provides,
+together with the depth and other GL-specific information for
+each. Note especially the column "lvl"; a number in this column means
+the visual is in an overlay plane.
+
+"sovinfo" will list all available visuals, and provides special
+transparency information for overlay visuals.
+
+The overlayrubber example program will output what visual is used for
+the normal Qt widgets, and what visual is used by the QGLWidget.
+
+
+
+Comments are welcome at info@trolltech.com.
diff --git a/examples/opengl/overlay_x11/gearwidget.cpp b/examples/opengl/overlay_x11/gearwidget.cpp
new file mode 100644
index 000000000..4d717f27e
--- /dev/null
+++ b/examples/opengl/overlay_x11/gearwidget.cpp
@@ -0,0 +1,268 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// A TQt OpenGL widget that draws a gear.
+//
+// Portions of this code has been borrowed from Brian Paul's Mesa
+// distribution.
+//
+
+#include "gearwidget.h"
+#include <math.h>
+#if defined(Q_WS_X11)
+#include <X11/Xlib.h>
+#endif
+
+#if defined(Q_CC_MSVC)
+#pragma warning(disable:4305) // init: truncation from const double to float
+#endif
+
+/*
+ * Draw a gear wheel.  You'll probably want to call this function when
+ * building a display list since we do a lot of trig here.
+ *
+ * Input:  inner_radius - radius of hole at center
+ *	   outer_radius - radius at center of teeth
+ *	   width - width of gear
+ *	   teeth - number of teeth
+ *	   tooth_depth - depth of tooth
+ */
+static void gear( GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
+		  GLint teeth, GLfloat tooth_depth )
+{
+    GLint i;
+    GLfloat r0, r1, r2;
+    GLfloat angle, da;
+    GLfloat u, v, len;
+
+    r0 = inner_radius;
+    r1 = outer_radius - tooth_depth/2.0;
+    r2 = outer_radius + tooth_depth/2.0;
+
+    const double pi = 3.14159264;
+    da = 2.0*pi / teeth / 4.0;
+
+    glShadeModel( GL_FLAT );
+
+    glNormal3f( 0.0, 0.0, 1.0 );
+
+    /* draw front face */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<=teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+	glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+	glVertex3f( r1*cos(angle), r1*sin(angle), width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+    }
+    glEnd();
+
+    /* draw front sides of teeth */
+    glBegin( GL_QUADS );
+    da = 2.0*pi / teeth / 4.0;
+    for (i=0;i<teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	  width*0.5 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	  width*0.5 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), width*0.5 );
+    }
+    glEnd();
+
+
+    glNormal3f( 0.0, 0.0, -1.0 );
+
+    /* draw back face */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<=teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+	glVertex3f( r1*cos(angle), r1*sin(angle), -width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+    }
+    glEnd();
+
+    /* draw back sides of teeth */
+    glBegin( GL_QUADS );
+    da = 2.0*pi / teeth / 4.0;
+    for (i=0;i<teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	  -width*0.5 );
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	  -width*0.5 );
+    }
+    glEnd();
+
+
+    /* draw outward faces of teeth */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	   width*0.5 );
+	glVertex3f( r1*cos(angle),      r1*sin(angle),	  -width*0.5 );
+	u = r2*cos(angle+da) - r1*cos(angle);
+	v = r2*sin(angle+da) - r1*sin(angle);
+	len = sqrt( u*u + v*v );
+	u /= len;
+	v /= len;
+	glNormal3f( v, -u, 0.0 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	   width*0.5 );
+	glVertex3f( r2*cos(angle+da),   r2*sin(angle+da),	  -width*0.5 );
+	glNormal3f( cos(angle), sin(angle), 0.0 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da),  width*0.5 );
+	glVertex3f( r2*cos(angle+2*da), r2*sin(angle+2*da), -width*0.5 );
+	u = r1*cos(angle+3*da) - r2*cos(angle+2*da);
+	v = r1*sin(angle+3*da) - r2*sin(angle+2*da);
+	glNormal3f( v, -u, 0.0 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da),  width*0.5 );
+	glVertex3f( r1*cos(angle+3*da), r1*sin(angle+3*da), -width*0.5 );
+	glNormal3f( cos(angle), sin(angle), 0.0 );
+    }
+
+    glVertex3f( r1*cos(0.0), r1*sin(0.0), width*0.5 );
+    glVertex3f( r1*cos(0.0), r1*sin(0.0), -width*0.5 );
+
+    glEnd();
+
+
+    glShadeModel( GL_SMOOTH );
+
+    /* draw inside radius cylinder */
+    glBegin( GL_QUAD_STRIP );
+    for (i=0;i<=teeth;i++) {
+	angle = i * 2.0*pi / teeth;
+	glNormal3f( -cos(angle), -sin(angle), 0.0 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), -width*0.5 );
+	glVertex3f( r0*cos(angle), r0*sin(angle), width*0.5 );
+    }
+    glEnd();
+
+}
+
+
+static GLfloat view_rotx=20.0, view_roty=30.0, view_rotz=0.0;
+static GLint gear1, gear2, gear3;
+static GLfloat angle = 0.0;
+
+
+static void draw()
+{
+    angle += 2.0;
+    view_roty += 1.0;
+
+    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+    glPushMatrix();
+    glRotatef( view_rotx, 1.0, 0.0, 0.0 );
+    glRotatef( view_roty, 0.0, 1.0, 0.0 );
+    glRotatef( view_rotz, 0.0, 0.0, 1.0 );
+
+    glPushMatrix();
+    glTranslatef( -3.0, -2.0, 0.0 );
+    glRotatef( angle, 0.0, 0.0, 1.0 );
+    glCallList(gear1);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef( 3.1, -2.0, 0.0 );
+    glRotatef( -2.0*angle-9.0, 0.0, 0.0, 1.0 );
+    glCallList(gear2);
+    glPopMatrix();
+
+    glPushMatrix();
+    glTranslatef( -3.1, 2.2, -1.8 );
+    glRotatef( 90.0, 1.0, 0.0, 0.0 );
+    glRotatef( 2.0*angle-2.0, 0.0, 0.0, 1.0 );
+    glCallList(gear3);
+    glPopMatrix();
+
+    glPopMatrix();
+}
+
+
+
+GearWidget::GearWidget( TQWidget *parent, const char *name )
+     : TQGLWidget( parent, name )
+{
+}
+
+void GearWidget::initializeGL()
+{
+    static GLfloat pos[4] = {5.0, 5.0, 10.0, 1.0 };
+    static GLfloat redgear[4] = {0.8, 0.1, 0.0, 1.0 };
+    static GLfloat greengear[4] = {0.0, 0.8, 0.2, 1.0 };
+    static GLfloat bluegear[4] = {0.2, 0.2, 1.0, 1.0 };
+
+    glLightfv( GL_LIGHT0, GL_POSITION, pos );
+    glEnable( GL_CULL_FACE );
+    glEnable( GL_LIGHTING );
+    glEnable( GL_LIGHT0 );
+    glEnable( GL_DEPTH_TEST );
+
+    /* make the gears */
+    gear1 = glGenLists(1);
+    glNewList(gear1, GL_COMPILE);
+    glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, redgear );
+    gear( 1.0, 4.0, 1.0, 20, 0.7 );
+    glEndList();
+
+    gear2 = glGenLists(1);
+    glNewList(gear2, GL_COMPILE);
+    glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, greengear );
+    gear( 0.5, 2.0, 2.0, 10, 0.7 );
+    glEndList();
+
+    gear3 = glGenLists(1);
+    glNewList(gear3, GL_COMPILE);
+    glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, bluegear );
+    gear( 1.3, 2.0, 0.5, 10, 0.7 );
+    glEndList();
+
+    glEnable( GL_NORMALIZE );
+}
+
+
+void GearWidget::resizeGL( int width, int height )
+{
+    GLfloat w = (float) width / (float) height;
+    GLfloat h = 1.0;
+
+    glViewport( 0, 0, width, height );
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glFrustum( -w, w, -h, h, 5.0, 60.0 );
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    glTranslatef( 0.0, 0.0, -40.0 );
+}
+
+
+void GearWidget::paintGL()
+{
+    qDebug( "GearWidget: Doing GL rendering." );
+#if defined (Q_GLX)
+    static bool doneIt = FALSE;
+    if ( !doneIt ) {
+	doneIt = TRUE;
+	// Print out the Visual ID. Access to this will be made
+	// simpler in future versions of TQt!
+	XWindowAttributes a;
+	XGetWindowAttributes( x11Display(), winId(), &a );
+	qDebug( "TQGLWidget: using Visual ID: 0x%x.",
+	       (int)XVisualIDFromVisual( a.visual ) );
+    }
+#endif
+    draw();
+}
+
diff --git a/examples/opengl/overlay_x11/gearwidget.h b/examples/opengl/overlay_x11/gearwidget.h
new file mode 100644
index 000000000..6154e36da
--- /dev/null
+++ b/examples/opengl/overlay_x11/gearwidget.h
@@ -0,0 +1,29 @@
+/****************************************************************************
+**
+** Definition of a simple TQt OpenGL widget
+**
+** Copyright (C) 1999-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef GEAR_H
+#define GEAR_H
+
+#include <qgl.h>
+
+class GearWidget : public TQGLWidget
+{
+public:
+    GearWidget( TQWidget *parent=0, const char *name=0 );
+
+protected:
+    void initializeGL();
+    void resizeGL( int, int );
+    void paintGL();
+};
+
+
+#endif
diff --git a/examples/opengl/overlay_x11/main.cpp b/examples/opengl/overlay_x11/main.cpp
new file mode 100644
index 000000000..70a6f4362
--- /dev/null
+++ b/examples/opengl/overlay_x11/main.cpp
@@ -0,0 +1,125 @@
+/****************************************************************************
+**
+** Example application showing how to use TQt and TQt OpenGL Extension on an 
+** X11 overlay visual 
+**
+** Copyright (C) 1999-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qapplication.h>
+#include "gearwidget.h"
+#include "rubberbandwidget.h"
+
+#if defined(Q_WS_X11)
+#include <X11/Xlib.h>
+#endif
+
+TQColor findOverlayTransparentColor()
+{
+    TQColor invalidColor;
+
+#if defined(Q_WS_X11)
+
+    Display* appDisplay;
+    Visual* appVisual;
+
+    // The static methods are called 'App' in TQt 2.x
+#if QT_VERSION < 200
+    appDisplay = TQPaintDevice::x__Display();
+    appVisual = (Visual*)TQPaintDevice::x11Visual();
+#else
+    appDisplay = TQPaintDevice::x11AppDisplay();
+    appVisual = (Visual*)TQPaintDevice::x11AppVisual();
+#endif
+
+    qDebug( "Default Visual ID: 0x%x", (int)XVisualIDFromVisual(appVisual) );
+
+    typedef struct OverlayProp {
+	long  visual;
+	long  type;
+	long  value;
+	long  layer;
+    } OverlayProp;
+
+    TQWidget* rootWin = TQApplication::desktop();
+    if ( !rootWin )
+	return invalidColor; // Should not happen
+
+    Atom overlayVisualsAtom = XInternAtom( appDisplay, 
+					   "SERVER_OVERLAY_VISUALS", True );
+    if ( overlayVisualsAtom == None ) {
+	warning( "Server has no overlay visuals" );
+	return invalidColor;
+    }
+
+    Atom actualType;
+    int actualFormat;
+    ulong nItems;
+    ulong bytesAfter;
+    OverlayProp* overlayProp;
+    int res = XGetWindowProperty( appDisplay, TQApplication::desktop()->winId(),
+				  overlayVisualsAtom, 0, 10000, False, 
+				  overlayVisualsAtom, &actualType, 
+				  &actualFormat, &nItems, &bytesAfter,
+				  (uchar**)&overlayProp );
+
+    if ( res != Success || actualType != overlayVisualsAtom 
+	 || actualFormat != 32 || nItems < 4 ) {
+	warning( "Failed to get overlay visual property from server" );
+	return invalidColor;
+    }
+
+
+    for ( uint i = 0; i < nItems/4; i++ ) {
+	if ( (VisualID)overlayProp[i].visual == XVisualIDFromVisual(appVisual)
+	     && overlayProp[i].type == 1 )
+	    return TQColor( qRgb( 1, 2, 3 ), overlayProp[i].value );
+    }
+
+    qWarning( "Default visual is not in overlay plane" );
+    return invalidColor;
+
+#else // defined(Q_WS_X11)
+    qWarning( "Wrong window system - Only X11 has overlay support." );
+    return invalidColor;
+#endif
+}
+
+
+int main( int argc, char **argv )
+{
+    TQApplication::setColorSpec( TQApplication::CustomColor );
+    TQApplication a( argc, argv );
+
+    if ( !TQGLFormat::hasOpenGL() ) {
+	qWarning( "This system has no OpenGL support. Exiting." );
+	return -1;
+    }
+
+    TQColor transparentColor = findOverlayTransparentColor();
+    if ( !transparentColor.isValid() ) {
+	qWarning( "Failed to get transparent color for overlay. Exiting." );
+	return -1;
+    }
+
+    TQWidget top;
+    a.setMainWidget( &top );
+    top.setGeometry( 50, 50, 600, 400 );
+
+    // Make an OpenGL widget. It will use the deepest visual available
+    // (typically a TrueColor visual), which typically is in the normal layer.
+    GearWidget g( &top );
+    g.setGeometry( 20, 20, 560, 360 );
+
+    // Put the rubberband widget (which uses the default, i.e. overlay visual)
+    // on top of the OpenGL widget:
+    RubberbandWidget r( transparentColor, &top );
+    r.setGeometry( 20, 20, 560, 360 );
+
+    top.show();
+    return a.exec();
+}
diff --git a/examples/opengl/overlay_x11/overlay_x11.doc b/examples/opengl/overlay_x11/overlay_x11.doc
new file mode 100644
index 000000000..6dddc9b9b
--- /dev/null
+++ b/examples/opengl/overlay_x11/overlay_x11.doc
@@ -0,0 +1,82 @@
+/*!   \page opengl-overlay-x11-example.html
+
+  \ingroup opengl-examples
+  \title OpenGL Overlay X11 Example
+
+\warning From version 5.0 onwards, the Qt OpenGL Extension includes
+direct support for use of OpenGL overlays. For many uses of overlays,
+this makes the technique described below redundant. See the \link
+opengl-overlay-example.html overlay\endlink example program. The
+following is a discussion on how to use non-QGL widgets in overlay
+planes.
+
+Overlayrubber: An example program showing how to use Qt and Qt OpenGL
+Extension with X11 overlay visuals.
+
+See \c{$QTDIR/examples/opengl/overlay_x11} for the source code.
+
+Background information for this example can be found in the
+information on \link opengl-x11-overlays.html overlays\endlink. 
+
+The example program has three main parts:
+
+\list 1
+\i \e GearWidget - a normal, simple QGLWidget. This renders the usual
+gears. It has been modified to print a debug message every time it
+redraws (renders) itself. Thus, you can easily confirm that drawing in
+the overlay plane does not cause redrawings in the main plane where
+the QGLWidget resides.
+
+\i \e RubberbandWidget - Very simple standard (non-GL) Qt widget that
+implements rubberband drawing. Designed for use in an overlay plane.
+It takes the plane's transparent color as a constructor argument and
+uses that for its background color. Thus, the widget itself will be
+invisible, only the rubberbands it draws will be visible.
+
+\i \e{main.cpp} Creates a GearWidget and a Rubberbandwidget and puts the
+latter on top of the former. Contains a routine that checks that the
+default visual is in an overlay plane, and returns the transparent
+color of that plane.
+\endlist
+
+\section1 Running the Example
+
+Start the \c overlayrubber executable. Click and drag with the left
+mouse button to see rubberband drawing. Observe that the QGLWidget
+does not redraw itself (no redraw debug messages are output), and yet
+the image is not destroyed. Marvel at the coolness of X11 overlays!
+
+
+\section1 Using this technique in a real application
+
+For clarity, this example program has been kept very simple. Here are
+some hints for real application usage:
+
+\list
+
+\i \e{All normal widgets are in the overlay plane.} This means that you
+can put all kinds of Qt widgets (your own or standard Qt widgets) on
+top of the OpenGL image (widget), e.g. pushbuttons etc., and they can
+be moved, resized, or removed without destroying the OpenGL image.
+
+\i \e{Using with geometry management.} The QLayout classes don't permit
+putting one widget (the overlay) on top of another (the OpenGL
+widget); that would defy the whole purpose of the automatic layout.
+The solution is to add just one of them to the QLayout object. Have it
+keep a pointer to the other (i.e. the QGLWidget knows about its
+overlay widget or vice versa). Implement the resizeEvent() method of
+the widget you put in the layout, and make it call setGeometry() on
+the other widget with its own geometry as parameters, thus keeping the
+two widgets' geometries synchronized.
+
+\i \e{Using together with QPalette and QColorGroup.} Instead of the
+simplistic setBackgroundColor( transparentColor ), you can
+use Qt's QPalette system to make your overlay widgets use
+transparent color for what you want. This way, the normal Qt widgets
+can be used as overlays for fancy effects. Just create a palette for
+them with the transparent color for the relevant color roles, e.g.
+Background and Base, in the Normal and/or Active modes. This way, you
+can create see-through QPushButtons etc.
+\endlist
+
+*/
diff --git a/examples/opengl/overlay_x11/overlayrubber.pro b/examples/opengl/overlay_x11/overlayrubber.pro
new file mode 100644
index 000000000..5381ebb2e
--- /dev/null
+++ b/examples/opengl/overlay_x11/overlayrubber.pro
@@ -0,0 +1,14 @@
+TEMPLATE	= app
+TARGET		= overlayrubber
+
+CONFIG		+= qt opengl warn_on release
+CONFIG -= dlopen_opengl
+DEPENDPATH	= ../include
+
+REQUIRES        = opengl full-config
+
+HEADERS		= gearwidget.h \
+		  rubberbandwidget.h
+SOURCES		= gearwidget.cpp \
+		  main.cpp \
+		  rubberbandwidget.cpp
diff --git a/examples/opengl/overlay_x11/rubberbandwidget.cpp b/examples/opengl/overlay_x11/rubberbandwidget.cpp
new file mode 100644
index 000000000..5cd5c5654
--- /dev/null
+++ b/examples/opengl/overlay_x11/rubberbandwidget.cpp
@@ -0,0 +1,59 @@
+/****************************************************************************
+**
+** Implementation of a widget that draws a rubberband. Designed to be used 
+** in an X11 overlay visual
+**
+** Copyright (C) 1999-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include "rubberbandwidget.h"
+#include <qpainter.h>
+
+
+RubberbandWidget::RubberbandWidget( TQColor transparentColor, TQWidget *parent, 
+				    const char *name, WFlags f )
+    : TQWidget( parent, name, f )
+{
+    setBackgroundColor( transparentColor );
+    on = FALSE;
+}
+
+
+void RubberbandWidget::mousePressEvent( TQMouseEvent* e )
+{
+    p1 = e->pos();
+    p2 = p1;
+    p3 = p1;
+    on = TRUE;
+    setMouseTracking( TRUE );
+}
+
+
+void RubberbandWidget::mouseMoveEvent( TQMouseEvent* e )
+{
+    if ( on ) {
+	p2 = e->pos();
+	TQPainter p( this );
+	// Erase last drawn rubberband:
+	p.setPen( TQPen( backgroundColor(), 3 ) );
+	p.drawRect( TQRect( p1, p3 ) );
+	// Draw the new one:
+	p.setPen( TQPen( white, 3 ) );
+	p.drawRect( TQRect(p1, p2) );
+	p3 = p2;
+    }
+}
+
+void RubberbandWidget::mouseReleaseEvent( TQMouseEvent* )
+{
+    if ( on ) {
+	TQPainter p ( this );
+	p.eraseRect( rect() );
+    }
+    on = FALSE;
+    setMouseTracking( FALSE );
+}
diff --git a/examples/opengl/overlay_x11/rubberbandwidget.h b/examples/opengl/overlay_x11/rubberbandwidget.h
new file mode 100644
index 000000000..10513a6d6
--- /dev/null
+++ b/examples/opengl/overlay_x11/rubberbandwidget.h
@@ -0,0 +1,37 @@
+/****************************************************************************
+**
+** Definition of a widget that draws a rubberband. Designed to be used 
+** in an X11 overlay visual
+**
+** Copyright (C) 1999-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#ifndef RUBBERBANDWIDGET_H
+#define RUBBERBANDWIDGET_H
+
+#include <qwidget.h>
+
+
+class RubberbandWidget : public TQWidget
+{
+public:
+    RubberbandWidget( TQColor transparentColor, TQWidget *parent=0, 
+		      const char *name=0, WFlags f=0 );
+
+protected:
+    void mousePressEvent( TQMouseEvent* e );
+    void mouseMoveEvent( TQMouseEvent* e );
+    void mouseReleaseEvent( TQMouseEvent* e );
+
+    TQColor c;
+    TQPoint p1;
+    TQPoint p2;
+    TQPoint p3;
+    bool on;
+};
+
+#endif
diff --git a/examples/opengl/overlay_x11/utilities/NOTICE b/examples/opengl/overlay_x11/utilities/NOTICE
new file mode 100644
index 000000000..4157392b3
--- /dev/null
+++ b/examples/opengl/overlay_x11/utilities/NOTICE
@@ -0,0 +1,11 @@
+
+NOTICE:  This source code distribution contains source code contained
+in the book "Programming OpenGL for the X Window System" (ISBN:
+0-201-48359-9) published by Addison-Wesley.  The programs and
+associated files contained in the distribution were developed by Mark
+J. Kilgard and are Copyright 1994, 1995, 1996 by Mark J.  Kilgard
+(unless otherwise noted).  The programs are not in the public domain,
+but they are freely distributable without licensing fees.  These
+programs are provided without guarantee or warranty expressed or
+implied.
+
diff --git a/examples/opengl/overlay_x11/utilities/README b/examples/opengl/overlay_x11/utilities/README
new file mode 100644
index 000000000..d96f3437b
--- /dev/null
+++ b/examples/opengl/overlay_x11/utilities/README
@@ -0,0 +1,22 @@
+
+Welcome to the "Programming OpenGL for the X Window System" Xlib-based
+example source code.  The following table names each example program
+directory and what section of the book discusses the example.
+
+Section        Example directory
+----------     ------------------
+  1.5            glxsimple
+  2.1            glxdino
+  2.2.2          glxvisuals
+  2.6.1          pixmap2eps
+  6.2.3.1        xdevices
+  6.2.7          dials
+  6.3.4          sovinfo
+  6.3.5          layerdemo
+
+I've tried to make the Makefiles as simple and as portable as
+possible.  If you find problems with these examples, please report bugs
+to mjk@sgi.com
+
+- Mark Kilgard
+
diff --git a/examples/opengl/overlay_x11/utilities/glxvisuals/glxvisuals.c b/examples/opengl/overlay_x11/utilities/glxvisuals/glxvisuals.c
new file mode 100644
index 000000000..3c1a21e68
--- /dev/null
+++ b/examples/opengl/overlay_x11/utilities/glxvisuals/glxvisuals.c
@@ -0,0 +1,147 @@
+
+/* Copyright (c) Mark J. Kilgard, 1996. */
+
+/* This program is freely distributable without licensing fees 
+   and is provided without guarantee or warrantee expressed or 
+   implied. This program is -not- in the public domain. */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <X11/Xlib.h>
+#include <GL/glx.h>
+
+static char *ClassOf(int c);
+static char *Format(int n, int w);
+
+void
+main(int argc, char *argv[])
+{
+  Display *dpy;
+  XVisualInfo match, *visualList, *vi, *visualToTry;
+  int errorBase, eventBase, major, minor, found;
+  int glxCapable, bufferSize, level, renderType, doubleBuffer, stereo,
+    auxBuffers, redSize, greenSize, blueSize, alphaSize, depthSize,
+    stencilSize, acRedSize, acGreenSize, acBlueSize, acAlphaSize;
+
+  dpy = XOpenDisplay(NULL);
+  if (!dpy) {
+    fprintf(stderr, "Could not connect to %s.\n", XDisplayName(NULL));
+    exit(1);
+  }
+  if (glXQueryExtension(dpy, &errorBase, &eventBase) == False) {
+    fprintf(stderr, "OpenGL not supported by X server.\n");
+    exit(1);
+  }
+
+  glXQueryVersion(dpy, &major, &minor);
+  printf("display: %s\n", XDisplayName(NULL));
+  printf("using GLX version: %d.%d\n\n", major, minor);
+
+  match.screen = DefaultScreen(dpy);
+  visualList = XGetVisualInfo(dpy, VisualScreenMask, &match, &found);
+
+  printf("   visual     bf lv rg d st  r  g  b a   ax dp st accum buffs\n");
+  printf(" id dep cl    sz l  ci b ro sz sz sz sz  bf th cl  r  g  b  a\n");
+  printf("-------------------------------------------------------------\n");
+
+  visualToTry = NULL;
+  for(vi = visualList; found > 0; found--, vi++) {
+    glXGetConfig(dpy, vi, GLX_USE_GL, &glxCapable);
+    if (glxCapable) {
+      printf("0x%x %2d %s", vi->visualid, vi->depth, ClassOf(vi->class));
+      glXGetConfig(dpy, vi, GLX_BUFFER_SIZE, &bufferSize);
+      glXGetConfig(dpy, vi, GLX_LEVEL, &level);
+      glXGetConfig(dpy, vi, GLX_RGBA, &renderType);
+      glXGetConfig(dpy, vi, GLX_DOUBLEBUFFER, &doubleBuffer);
+      glXGetConfig(dpy, vi, GLX_STEREO, &stereo);
+      glXGetConfig(dpy, vi, GLX_AUX_BUFFERS, &auxBuffers);
+      glXGetConfig(dpy, vi, GLX_RED_SIZE, &redSize);
+      glXGetConfig(dpy, vi, GLX_GREEN_SIZE, &greenSize);
+      glXGetConfig(dpy, vi, GLX_BLUE_SIZE, &blueSize);
+      glXGetConfig(dpy, vi, GLX_ALPHA_SIZE, &alphaSize);
+      glXGetConfig(dpy, vi, GLX_DEPTH_SIZE, &depthSize);
+      glXGetConfig(dpy, vi, GLX_STENCIL_SIZE, &stencilSize);
+      glXGetConfig(dpy, vi, GLX_ACCUM_RED_SIZE, &acRedSize);
+      glXGetConfig(dpy, vi, GLX_ACCUM_GREEN_SIZE, &acGreenSize);
+      glXGetConfig(dpy, vi, GLX_ACCUM_BLUE_SIZE, &acBlueSize);
+      glXGetConfig(dpy, vi, GLX_ACCUM_ALPHA_SIZE, &acAlphaSize);
+      printf("    %2s %2s %1s  %1s  %1s ",
+        Format(bufferSize, 2), Format(level, 2),
+        renderType ? "r" : "c",
+	doubleBuffer ? "y" : ".", 
+	stereo ? "y" : ".");
+      printf("%2s %2s %2s %2s ",
+        Format(redSize, 2), Format(greenSize, 2),
+	Format(blueSize, 2), Format(alphaSize, 2));
+      printf("%2s %2s %2s %2s %2s %2s %2s",
+        Format(auxBuffers, 2), Format(depthSize, 2), Format(stencilSize, 2),
+        Format(acRedSize, 2), Format(acGreenSize, 2),
+        Format(acBlueSize, 2), Format(acAlphaSize, 2));
+      printf("\n");
+      visualToTry = vi;
+    }
+  }
+
+  if (visualToTry) {
+    GLXContext context;
+    Window window;
+    Colormap colormap;
+    XSetWindowAttributes swa;
+
+    context = glXCreateContext(dpy, visualToTry, 0, GL_TRUE);
+    colormap = XCreateColormap(dpy,
+      RootWindow(dpy, visualToTry->screen),
+      visualToTry->visual, AllocNone);
+    swa.colormap = colormap;
+    swa.border_pixel = 0;
+    window = XCreateWindow(dpy, RootWindow(dpy, visualToTry->screen), 0, 0, 100, 100,
+      0, visualToTry->depth, InputOutput, visualToTry->visual,
+      CWBorderPixel | CWColormap, &swa);
+    glXMakeCurrent(dpy, window, context);
+    printf("\n");
+    printf("OpenGL vendor string: %s\n", glGetString(GL_VENDOR));
+    printf("OpenGL renderer string: %s\n", glGetString(GL_RENDERER));
+    printf("OpenGL version string: %s\n", glGetString(GL_VERSION));
+    if (glXIsDirect(dpy, context))
+      printf("direct rendering: supported\n");
+    printf( "GL extensions: '%s'\n\n", glGetString(GL_EXTENSIONS) );
+#if defined(GLX_VERSION_1_1)
+    printf( "GLX extensions: '%s'\n\n", glXQueryExtensionsString( dpy, visualToTry->screen ) );
+#endif
+
+  } else
+    printf("No GLX-capable visuals!\n");
+  XFree(visualList);
+}
+
+static char *
+ClassOf(int c)
+{
+  switch (c) {
+  case StaticGray:   return "sg";
+  case GrayScale:    return "gs";
+  case StaticColor:  return "sc";
+  case PseudoColor:  return "pc";
+  case TrueColor:    return "tc";
+  case DirectColor:  return "dc";
+  default:           return "??";
+  }
+}
+
+static char *
+Format(int n, int w)
+{
+  static char buffer[256];
+  static int bufptr;
+  char *buf;
+
+  if (bufptr >= sizeof(buffer) - w)
+    bufptr = 0;
+  buf = buffer + bufptr;
+  if (n == 0)
+    sprintf(buf, "%*s", w, ".");
+  else
+    sprintf(buf, "%*d", w, n);
+  bufptr += w + 1;
+  return buf;
+}
diff --git a/examples/opengl/overlay_x11/utilities/sovinfo/sovLayerUtil.h b/examples/opengl/overlay_x11/utilities/sovinfo/sovLayerUtil.h
new file mode 100644
index 000000000..f45423a8d
--- /dev/null
+++ b/examples/opengl/overlay_x11/utilities/sovinfo/sovLayerUtil.h
@@ -0,0 +1,54 @@
+#ifndef __sovLayerUtil_h__
+#define __sovLayerUtil_h__
+
+/* Copyright (c) Mark J. Kilgard, 1996. */
+
+/* This program is freely distributable without licensing fees 
+   and is provided without guarantee or warrantee expressed or 
+   implied. This program is -not- in the public domain. */
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xmd.h>
+
+/* Transparent type values */
+/*      None                  0 */
+#define TransparentPixel      1
+#define TransparentMask       2
+
+/* layered visual info template flags */
+#define VisualLayerMask		0x200
+#define VisualTransparentType	0x400
+#define VisualTransparentValue	0x800
+#define VisualAllLayerMask	0xFFF
+
+/* layered visual info structure */
+typedef struct _sovVisualInfo {
+   XVisualInfo vinfo;
+   int layer;
+   int type;
+   unsigned long value;
+} sovVisualInfo;
+
+/* SERVER_OVERLAY_VISUALS property element */
+typedef struct _sovOverlayInfo {
+   long  overlay_visual;
+   long  transparent_type;
+   long  value;
+   long  layer;
+} sovOverlayInfo;
+
+extern sovVisualInfo *sovGetVisualInfo(
+  Display *display,
+  long lvinfo_mask,
+  sovVisualInfo *lvinfo_template,
+  int *nitems_return);
+extern Status sovMatchVisualInfo(
+  Display *display,
+  int screen,
+  int depth,
+  int class,
+  int layer,
+  sovVisualInfo *lvinfo_return);
+
+#endif /* __sovLayerUtil_h__ */
diff --git a/examples/opengl/overlay_x11/utilities/sovinfo/sovinfo.c b/examples/opengl/overlay_x11/utilities/sovinfo/sovinfo.c
new file mode 100644
index 000000000..059050c2f
--- /dev/null
+++ b/examples/opengl/overlay_x11/utilities/sovinfo/sovinfo.c
@@ -0,0 +1,95 @@
+
+/* Copyright (c) Mark J. Kilgard, 1996. */
+
+/* This program is freely distributable without licensing fees 
+   and is provided without guarantee or warrantee expressed or 
+   implied. This program is -not- in the public domain. */
+
+/* compile: cc -o sovinfo sovinfo.c sovLayerUtil.c -lX11 */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "sovLayerUtil.h"
+
+int
+main(int argc, char *argv[])
+{
+  Display *dpy;
+  char *display_name, *arg, *class;
+  sovVisualInfo template, *lvinfo;
+  int nVisuals, i, overlaysOnly = 0;
+
+  display_name = NULL;
+  for (i = 1; i < argc; i++) {
+    arg = argv[i];
+    if (!strcmp(arg, "-display")) {
+      if (++i >= argc) {
+        fprintf(stderr, "sovinfo: missing argument to -display\n");
+        exit(1);
+      }
+      display_name = argv[i];
+    } else if (!strcmp(arg, "-overlays_only")) {
+      overlaysOnly = 1;
+    } else {
+      fprintf(stderr,
+        "usage: sovinfo [-display dpy] [-overlays_only]\n");
+      exit(1);
+    }
+  }
+  dpy = XOpenDisplay(display_name);
+  if (dpy == NULL) {
+    fprintf(stderr, "sovinfo: cannot open display %s\n",
+      XDisplayName(NULL));
+    exit(1);
+  }
+  lvinfo = sovGetVisualInfo(dpy, 0L, &template, &nVisuals);
+  for (i = 0; i < nVisuals; i++) {
+    if (!overlaysOnly || lvinfo[i].layer > 0) {
+      printf("  Visual ID: 0x%x\n", lvinfo[i].vinfo.visualid);
+      printf("    screen: %d\n", lvinfo[i].vinfo.screen);
+      printf("    depth: %d\n", lvinfo[i].vinfo.depth);
+      switch (lvinfo[i].vinfo.class) {
+      case StaticGray:
+        class = "StaticGray";
+        break;
+      case GrayScale:
+        class = "GrayScale";
+        break;
+      case StaticColor:
+        class = "StaticColor";
+        break;
+      case PseudoColor:
+        class = "PseudoColor";
+        break;
+      case TrueColor:
+        class = "TrueColor";
+        break;
+      case DirectColor:
+        class = "DirectColor";
+        break;
+      default:
+        class = "Unknown";
+        break;
+      }
+      printf("    class: %s\n", class);
+      switch (lvinfo[i].type) {
+      case None:
+        printf("    transparent type: None\n");
+        break;
+      case TransparentPixel:
+        printf("    transparent type: TransparentPixel\n");
+        printf("    pixel value: %d\n", lvinfo[i].value);
+        break;
+      case TransparentMask:
+        printf("    transparent type: TransparentMask\n");
+        printf("    transparency mask: %0x%x\n", lvinfo[i].value);
+        break;
+      default:
+        printf("    transparent type: Unknown or invalid\n");
+        break;
+      }
+      printf("    layer: %d\n", lvinfo[i].layer);
+    }
+  }
+  return 0;
+}
diff --git a/examples/opengl/overlay_x11/utilities/sovinfo/sovlayerutil.c b/examples/opengl/overlay_x11/utilities/sovinfo/sovlayerutil.c
new file mode 100644
index 000000000..8837d06cf
--- /dev/null
+++ b/examples/opengl/overlay_x11/utilities/sovinfo/sovlayerutil.c
@@ -0,0 +1,150 @@
+
+/* Copyright (c) Mark J. Kilgard, 1996. */
+
+/* This program is freely distributable without licensing fees 
+   and is provided without guarantee or warrantee expressed or 
+   implied. This program is -not- in the public domain. */
+
+#include <stdlib.h>
+#include "sovLayerUtil.h"
+
+static Bool layersRead;
+static Atom overlayVisualsAtom;
+static sovOverlayInfo **overlayInfoPerScreen;
+static int *numOverlaysPerScreen;
+
+sovVisualInfo *
+sovGetVisualInfo(Display *display, long lvinfo_mask,
+  sovVisualInfo *lvinfo_template, int *nitems_return)
+{
+  XVisualInfo *vinfo;
+  sovVisualInfo *layerInfo;
+  Window root;
+  Status status;
+  Atom actualType;
+  unsigned long sizeData, bytesLeft;
+  int actualFormat, numVisuals, numScreens, count, i, j;
+
+  vinfo = XGetVisualInfo(display, lvinfo_mask & VisualAllMask,
+    &lvinfo_template->vinfo, nitems_return);
+  if (vinfo == NULL)
+    return NULL;
+  numVisuals = *nitems_return;
+  if (layersRead == False) {
+    overlayVisualsAtom = XInternAtom(display, 
+      "SERVER_OVERLAY_VISUALS", True);
+    if (overlayVisualsAtom != None) {
+      numScreens = ScreenCount(display);
+      overlayInfoPerScreen = (sovOverlayInfo **)
+        malloc(numScreens * sizeof(sovOverlayInfo *));
+      numOverlaysPerScreen = (int *) malloc(numScreens * sizeof(int));
+      if (overlayInfoPerScreen != NULL &&
+        numOverlaysPerScreen != NULL) {
+        for (i = 0; i < numScreens; i++) {
+          root = RootWindow(display, i);
+          status = XGetWindowProperty(display, root, overlayVisualsAtom,
+            0L, (long) 10000, False, overlayVisualsAtom,
+	    &actualType, &actualFormat,
+            &sizeData, &bytesLeft,
+	    (unsigned char **) &overlayInfoPerScreen[i]);
+          if (status != Success ||
+	    actualType != overlayVisualsAtom ||
+            actualFormat != 32 || sizeData < 4)
+            numOverlaysPerScreen[i] = 0;
+          else
+            numOverlaysPerScreen[i] = sizeData / 4;
+        }
+        layersRead = True;
+      } else {
+        if (overlayInfoPerScreen != NULL)
+          free(overlayInfoPerScreen);
+        if (numOverlaysPerScreen != NULL)
+          free(numOverlaysPerScreen);
+      }
+    }
+  }
+  layerInfo = (sovVisualInfo *)
+    malloc(numVisuals * sizeof(sovVisualInfo));
+  if (layerInfo == NULL) {
+    XFree(vinfo);
+    return NULL;
+  }
+  count = 0;
+  for (i = 0; i < numVisuals; i++) {
+    XVisualInfo *pVinfo;
+    int screen;
+    sovOverlayInfo *overlayInfo;
+
+    pVinfo = &vinfo[i];
+    screen = pVinfo->screen;
+    overlayInfo = NULL;
+    if (layersRead) {
+      for (j = 0; j < numOverlaysPerScreen[screen]; j++)
+        if (pVinfo->visualid == 
+  	  overlayInfoPerScreen[screen][j].overlay_visual) {
+          overlayInfo = &overlayInfoPerScreen[screen][j];
+          break;
+        }
+    }
+    if (lvinfo_mask & VisualLayerMask)
+      if (overlayInfo == NULL) {
+        if (lvinfo_template->layer != 0)
+          continue;
+      } else if (lvinfo_template->layer != overlayInfo->layer)
+        continue;
+    if (lvinfo_mask & VisualTransparentType)
+      if (overlayInfo == NULL) {
+        if (lvinfo_template->type != None)
+          continue;
+      } else if (lvinfo_template->type !=
+        overlayInfo->transparent_type)
+        continue;
+    if (lvinfo_mask & VisualTransparentValue)
+      if (overlayInfo == NULL)
+        /* non-overlay visuals have no sense of
+           TransparentValue */
+        continue;
+      else if (lvinfo_template->value != overlayInfo->value)
+        continue;
+    layerInfo[count].vinfo = *pVinfo;
+    if (overlayInfo == NULL) {
+      layerInfo[count].layer = 0;
+      layerInfo[count].type = None;
+      layerInfo[count].value = 0;  /* meaningless */
+    } else {
+      layerInfo[count].layer = overlayInfo->layer;
+      layerInfo[count].type = overlayInfo->transparent_type;
+      layerInfo[count].value = overlayInfo->value;
+    }
+    count++;
+  }
+  XFree(vinfo);
+  *nitems_return = count;
+  if (count == 0) {
+    XFree(layerInfo);
+    return NULL;
+  } else
+    return layerInfo;
+}
+
+Status
+sovMatchVisualInfo(Display *display, int screen,
+  int depth, int class, int layer, sovVisualInfo *lvinfo_return)
+{
+  sovVisualInfo *lvinfo;
+  sovVisualInfo lvinfoTemplate;
+  int nitems;
+
+  lvinfoTemplate.vinfo.screen = screen;
+  lvinfoTemplate.vinfo.depth = depth;
+  lvinfoTemplate.vinfo.class = class;
+  lvinfoTemplate.layer = layer;
+  lvinfo = sovGetVisualInfo(display,
+    VisualScreenMask|VisualDepthMask|VisualClassMask|VisualLayerMask,
+    &lvinfoTemplate, &nitems);
+  if (lvinfo != NULL && nitems > 0) {
+    *lvinfo_return = *lvinfo;
+    return 1;
+  } else
+    return 0;
+}
diff --git a/examples/opengl/sharedbox/README b/examples/opengl/sharedbox/README
new file mode 100644
index 000000000..4959294d5
--- /dev/null
+++ b/examples/opengl/sharedbox/README
@@ -0,0 +1,8 @@
+
+The shared box example
+
+This example program is an extension of the "box" example program.
+
+It demonstrates how to use OpenGL display list sharing with QGLWidgets.
+
+
diff --git a/examples/opengl/sharedbox/glbox.cpp b/examples/opengl/sharedbox/glbox.cpp
new file mode 100644
index 000000000..f3ded8888
--- /dev/null
+++ b/examples/opengl/sharedbox/glbox.cpp
@@ -0,0 +1,211 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget displaying a box
+**
+** The OpenGL code is mostly borrowed from Brian Pauls "spin" example
+** in the Mesa distribution
+**
+****************************************************************************/
+
+#include "glbox.h"
+
+// Initialize static class variables:
+
+// Shared display list id:
+GLuint GLBox::sharedDisplayList = 0;
+
+// Counter keeping track of number of GLBox instances sharing 
+// the display list, so that the last instance can delete it:
+int GLBox::sharedListUsers = 0;
+
+
+/*!
+  Create a GLBox widget
+*/
+
+GLBox::GLBox( TQWidget* parent, const char* name, const TQGLWidget* shareWidget )
+    : TQGLWidget( parent, name, shareWidget )
+{
+    xRot = yRot = zRot = 0.0;		// default object rotation
+    scale = 1.0;			// default object scale
+    object = 0;
+    localDisplayList = 0;
+}
+
+
+/*!
+  Set up the OpenGL rendering state. Robustly access shared display list.
+*/
+
+void GLBox::initializeGL()
+{
+    // Let OpenGL clear to black
+    qglClearColor( black ); 
+
+    glEnable(GL_DEPTH_TEST);
+
+    if ( sharedListUsers == 0 ) {	// No shared list has been made yet
+	sharedDisplayList = makeObject();	// Make one
+	object = sharedDisplayList;		// Use it
+	sharedListUsers++;				// Keep reference count
+	qDebug( "GLBox %s created shared display list.", name() );
+    }
+    else {				// There is a shared diplay list
+	if ( isSharing() ) {		// Can we access it?
+	    object = sharedDisplayList;		// Yes, use it
+	    sharedListUsers++;			// Keep reference count
+	    qDebug( "GLBox %s uses shared display list.", name() );
+	}
+	else {				
+	    localDisplayList = makeObject();	// No, roll our own
+	    object = localDisplayList;		// and use that
+	    qDebug( "GLBox %s uses private display list.", name() );
+	}
+    }
+}
+
+
+
+/*!
+  Release allocated resources
+*/
+
+GLBox::~GLBox()
+{
+    makeCurrent();				// We're going to do gl calls
+    if ( localDisplayList != 0 ) {		// Did we make our own?
+	glDeleteLists( localDisplayList, 1 );	// Yes, delete it
+	qDebug( "GLBox %s deleted private display list.", name() );
+    }
+    else {
+	sharedListUsers--;	// No, we used the shared one; keep refcount
+	if ( sharedListUsers == 0 ) { 			// Any sharers left?
+	    glDeleteLists( sharedDisplayList, 1 );	// No, delete it
+	    sharedDisplayList = 0;
+	    qDebug( "GLBox %s deleted shared display list.", name() );
+	}
+    }
+}
+
+
+/*!
+  Paint the box. The actual openGL commands for drawing the box are
+  performed here.
+*/
+
+void GLBox::paintGL()
+{
+    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+    glMatrixMode( GL_MODELVIEW );
+    glLoadIdentity();
+    glTranslatef( 0.0, 0.0, -3.0 );
+    glScalef( scale, scale, scale );
+
+    glRotatef( xRot, 1.0, 0.0, 0.0 ); 
+    glRotatef( yRot, 0.0, 1.0, 0.0 ); 
+    glRotatef( zRot, 0.0, 0.0, 1.0 );
+
+    glCallList( object );
+}
+
+
+
+
+/*!
+  Set up the OpenGL view port, matrix mode, etc.
+*/
+
+void GLBox::resizeGL( int w, int h )
+{
+    glViewport( 0, 0, (GLint)w, (GLint)h );
+    glMatrixMode( GL_PROJECTION );
+    glLoadIdentity();
+    glFrustum(-1.0, 1.0, -1.0, 1.0, 1.0, 10.0);
+}
+
+
+/*!
+  Generate an OpenGL display list for the object to be shown, i.e. the box
+*/
+
+GLuint GLBox::makeObject()
+{
+    GLuint list;
+
+    list = glGenLists( 1 );
+
+    glNewList( list, GL_COMPILE );
+
+    glBegin(GL_QUADS);
+    /* Front face */
+    qglColor( green );
+    glVertex3f(-1.0, 1.0, 1.0);
+    glVertex3f(1.0, 1.0, 1.0);
+    glVertex3f(1.0, -1.0, 1.0);
+    glVertex3f(-1.0, -1.0, 1.0);
+    /* Back face */
+    qglColor( yellow );
+    glVertex3f(-1.0, 1.0, -1.0);
+    glVertex3f(1.0, 1.0, -1.0);
+    glVertex3f(1.0, -1.0, -1.0);
+    glVertex3f(-1.0, -1.0, -1.0);
+    /* Top side face */
+    qglColor( blue );
+    glVertex3f(-1.0, 1.0, 1.0);
+    glVertex3f(1.0, 1.0, 1.0);
+    glVertex3f(1.0, 1.0, -1.0);
+    glVertex3f(-1.0, 1.0, -1.0);
+    /* Bottom side face */
+    qglColor( red );
+    glVertex3f(-1.0, -1.0, 1.0);
+    glVertex3f(1.0, -1.0, 1.0);
+    glVertex3f(1.0, -1.0, -1.0);
+    glVertex3f(-1.0, -1.0, -1.0);
+    glEnd();
+    glEndList();
+
+    return list;
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the X axis.
+*/
+
+void GLBox::setXRotation( int degrees )
+{
+    xRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Y axis.
+*/
+
+void GLBox::setYRotation( int degrees )
+{
+    yRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Z axis.
+*/
+
+void GLBox::setZRotation( int degrees )
+{
+    zRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
diff --git a/examples/opengl/sharedbox/glbox.h b/examples/opengl/sharedbox/glbox.h
new file mode 100644
index 000000000..089513d33
--- /dev/null
+++ b/examples/opengl/sharedbox/glbox.h
@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget displaying a box
+**
+****************************************************************************/
+
+#ifndef GLBOX_H
+#define GLBOX_H
+
+#include <qgl.h>
+
+
+class GLBox : public TQGLWidget
+{
+    Q_OBJECT
+
+public:
+
+    GLBox( TQWidget* parent, const char* name, const TQGLWidget* shareWidget=0 );
+    ~GLBox();
+
+public slots:
+
+    void		setXRotation( int degrees );
+    void		setYRotation( int degrees );
+    void		setZRotation( int degrees );
+
+protected:
+
+    void		initializeGL();
+    void		paintGL();
+    void		resizeGL( int w, int h );
+
+    virtual GLuint 	makeObject();
+
+private:
+
+    GLuint		object;
+    GLuint		localDisplayList;
+
+    static GLuint	sharedDisplayList;
+    static int		sharedListUsers;
+
+    GLfloat xRot, yRot, zRot, scale;
+
+};
+
+
+#endif // GLBOX_H
diff --git a/examples/opengl/sharedbox/globjwin.cpp b/examples/opengl/sharedbox/globjwin.cpp
new file mode 100644
index 000000000..f908add4b
--- /dev/null
+++ b/examples/opengl/sharedbox/globjwin.cpp
@@ -0,0 +1,99 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qpushbutton.h>
+#include <qslider.h>
+#include <qlayout.h>
+#include <qframe.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qapplication.h>
+#include <qkeycode.h>
+#include "globjwin.h"
+#include "glbox.h"
+
+
+GLObjectWindow::GLObjectWindow( TQWidget* parent, const char* name )
+    : TQWidget( parent, name )
+{
+    // Create a menu
+    TQPopupMenu *file = new TQPopupMenu( this );
+    file->insertItem( "Delete Left TQGLWidget", this, 
+		      SLOT(deleteFirstWidget()) );
+    file->insertItem( "Exit",  qApp, SLOT(tquit()), CTRL+Key_Q );
+
+    // Create a menu bar
+    TQMenuBar *m = new TQMenuBar( this );
+    m->setSeparator( TQMenuBar::InWindowsStyle );
+    m->insertItem("&File", file );
+
+    // Create nice frames to put around the OpenGL widgets
+    TQFrame* f1 = new TQFrame( this, "frame1" );
+    f1->setFrameStyle( TQFrame::Sunken | TQFrame::Panel );
+    f1->setLineWidth( 2 );
+    TQFrame* f2 = new TQFrame( this, "frame2" );
+    f2->setFrameStyle( TQFrame::Sunken | TQFrame::Panel );
+    f2->setLineWidth( 2 );
+
+    // Create an OpenGL widget
+    c1 = new GLBox( f1, "glbox1" );
+    
+    // Create another OpenGL widget that shares display lists with the first
+    c2 = new GLBox( f2, "glbox2", c1 );
+
+    // Create the three sliders; one for each rotation axis
+    // Make them spin the boxes, but not in synch
+    TQSlider* x = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "xsl" );
+    x->setTickmarks( TQSlider::Left );
+    connect( x, SIGNAL(valueChanged(int)), c1, SLOT(setXRotation(int)) );
+    connect( x, SIGNAL(valueChanged(int)), c2, SLOT(setZRotation(int)) );
+
+    TQSlider* y = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "ysl" );
+    y->setTickmarks( TQSlider::Left );
+    connect( y, SIGNAL(valueChanged(int)), c1, SLOT(setYRotation(int)) );
+    connect( y, SIGNAL(valueChanged(int)), c2, SLOT(setXRotation(int)) );
+
+    TQSlider* z = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "zsl" );
+    z->setTickmarks( TQSlider::Left );
+    connect( z, SIGNAL(valueChanged(int)), c1, SLOT(setZRotation(int)) );
+    connect( z, SIGNAL(valueChanged(int)), c2, SLOT(setYRotation(int)) );
+
+
+    // Now that we have all the widgets, put them into a nice layout
+
+    // Put the sliders on top of each other
+    TQVBoxLayout* vlayout = new TQVBoxLayout( 20, "vlayout");
+    vlayout->addWidget( x );
+    vlayout->addWidget( y );
+    vlayout->addWidget( z );
+
+    // Put the GL widgets inside the frames
+    TQHBoxLayout* flayout1 = new TQHBoxLayout( f1, 2, 2, "flayout1");
+    flayout1->addWidget( c1, 1 );
+    TQHBoxLayout* flayout2 = new TQHBoxLayout( f2, 2, 2, "flayout2");
+    flayout2->addWidget( c2, 1 );
+
+    // Top level layout, puts the sliders to the left of the frame/GL widget
+    TQHBoxLayout* hlayout = new TQHBoxLayout( this, 20, 20, "hlayout");
+    hlayout->setMenuBar( m );
+    hlayout->addLayout( vlayout );
+    hlayout->addWidget( f1, 1 );
+    hlayout->addWidget( f2, 1 );
+
+}
+
+
+void GLObjectWindow::deleteFirstWidget()
+{
+    // Delete only c1; c2 will keep working and use the shared display list
+    if ( c1 ) {
+	delete c1;
+	c1 = 0;
+    }
+}
diff --git a/examples/opengl/sharedbox/globjwin.h b/examples/opengl/sharedbox/globjwin.h
new file mode 100644
index 000000000..c42f2ea72
--- /dev/null
+++ b/examples/opengl/sharedbox/globjwin.h
@@ -0,0 +1,39 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** The GLObjectWindow contains a GLBox and three sliders connected to
+** the GLBox's rotation slots.
+**
+****************************************************************************/
+
+#ifndef GLOBJWIN_H
+#define GLOBJWIN_H
+
+#include <qwidget.h>
+class GLBox;
+
+class GLObjectWindow : public TQWidget
+{
+    Q_OBJECT
+public:
+    GLObjectWindow( TQWidget* parent = 0, const char* name = 0 );
+
+protected slots:
+
+    void		deleteFirstWidget();
+
+private:
+    GLBox* c1;
+    GLBox* c2;
+};
+
+
+#endif // GLOBJWIN_H
diff --git a/examples/opengl/sharedbox/main.cpp b/examples/opengl/sharedbox/main.cpp
new file mode 100644
index 000000000..13e474007
--- /dev/null
+++ b/examples/opengl/sharedbox/main.cpp
@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// TQt OpenGL example: Shared Box
+//
+// A small example showing how to use OpenGL display list sharing
+// 
+// File: main.cpp
+//
+// The main() function 
+// 
+
+#include "globjwin.h"
+#include <qapplication.h>
+#include <qgl.h>
+
+/*
+  The main program is here. 
+*/
+
+int main( int argc, char **argv )
+{
+    TQApplication::setColorSpec( TQApplication::CustomColor );
+    TQApplication a(argc,argv);			
+
+    if ( !TQGLFormat::hasOpenGL() ) {
+	qWarning( "This system has no OpenGL support. Exiting." );
+	return -1;
+    }
+
+    GLObjectWindow w;
+    w.resize( 550, 350 );
+    a.setMainWidget( &w );
+    w.show();
+    return a.exec();
+}
diff --git a/examples/opengl/sharedbox/sharedbox.doc b/examples/opengl/sharedbox/sharedbox.doc
new file mode 100644
index 000000000..21e7a66a3
--- /dev/null
+++ b/examples/opengl/sharedbox/sharedbox.doc
@@ -0,0 +1,16 @@
+/*!   \page opengl-sharedbox-example.html
+
+  \ingroup opengl-examples
+  \title OpenGL Shared Box Example
+
+
+This example program is an extension of the \link
+opengl-box-example.html Box example\endlink.
+
+It demonstrates how to use OpenGL display list sharing with
+QGLWidgets.
+
+See \c{$QTDIR/examples/opengl/sharedbox} for the source code.
+
+*/
+
diff --git a/examples/opengl/sharedbox/sharedbox.pro b/examples/opengl/sharedbox/sharedbox.pro
new file mode 100644
index 000000000..30b92e8ca
--- /dev/null
+++ b/examples/opengl/sharedbox/sharedbox.pro
@@ -0,0 +1,14 @@
+TEMPLATE	= app
+TARGET		= sharedbox
+
+CONFIG		+= qt opengl warn_on release
+CONFIG -= dlopen_opengl
+DEPENDPATH	= ../include
+
+REQUIRES        = opengl
+
+HEADERS		= glbox.h \
+		  globjwin.h
+SOURCES		= glbox.cpp \
+		  globjwin.cpp \
+		  main.cpp
diff --git a/examples/opengl/texture/README b/examples/opengl/texture/README
new file mode 100644
index 000000000..5b85cd719
--- /dev/null
+++ b/examples/opengl/texture/README
@@ -0,0 +1,4 @@
+
+The texture example
+
+This example program demonstrates how to use OpenGL 2D textures.
diff --git a/examples/opengl/texture/gllogo.bmp b/examples/opengl/texture/gllogo.bmp
new file mode 100644
index 000000000..ee64a1036
--- /dev/null
+++ b/examples/opengl/texture/gllogo.bmp
diff --git a/examples/opengl/texture/globjwin.cpp b/examples/opengl/texture/globjwin.cpp
new file mode 100644
index 000000000..e46833faf
--- /dev/null
+++ b/examples/opengl/texture/globjwin.cpp
@@ -0,0 +1,78 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qpushbutton.h>
+#include <qslider.h>
+#include <qlayout.h>
+#include <qframe.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qapplication.h>
+#include <qkeycode.h>
+#include "globjwin.h"
+#include "gltexobj.h"
+
+
+GLObjectWindow::GLObjectWindow( TQWidget* parent, const char* name )
+    : TQWidget( parent, name )
+{
+
+    // Create nice frames to put around the OpenGL widgets
+    TQFrame* f1 = new TQFrame( this, "frame1" );
+    f1->setFrameStyle( TQFrame::Sunken | TQFrame::Panel );
+    f1->setLineWidth( 2 );
+
+    // Create an OpenGL widget
+    GLTexobj* c = new GLTexobj( f1, "glbox1");
+
+    // Create a menu
+    TQPopupMenu *file = new TQPopupMenu( this );
+    file->insertItem( "Toggle Animation", c, SLOT(toggleAnimation()),
+		      CTRL+Key_A );
+    file->insertSeparator();
+    file->insertItem( "Exit",  qApp, SLOT(tquit()), CTRL+Key_Q );
+    
+    // Create a menu bar
+    TQMenuBar *m = new TQMenuBar( this );
+    m->setSeparator( TQMenuBar::InWindowsStyle );
+    m->insertItem("&File", file );
+
+    // Create the three sliders; one for each rotation axis
+    TQSlider* x = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "xsl" );
+    x->setTickmarks( TQSlider::Left );
+    connect( x, SIGNAL(valueChanged(int)), c, SLOT(setXRotation(int)) );
+
+    TQSlider* y = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "ysl" );
+    y->setTickmarks( TQSlider::Left );
+    connect( y, SIGNAL(valueChanged(int)), c, SLOT(setYRotation(int)) );
+
+    TQSlider* z = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "zsl" );
+    z->setTickmarks( TQSlider::Left );
+    connect( z, SIGNAL(valueChanged(int)), c, SLOT(setZRotation(int)) );
+
+
+    // Now that we have all the widgets, put them into a nice layout
+
+    // Put the sliders on top of each other
+    TQVBoxLayout* vlayout = new TQVBoxLayout( 20, "vlayout");
+    vlayout->addWidget( x );
+    vlayout->addWidget( y );
+    vlayout->addWidget( z );
+
+    // Put the GL widget inside the frame
+    TQHBoxLayout* flayout1 = new TQHBoxLayout( f1, 2, 2, "flayout1");
+    flayout1->addWidget( c, 1 );
+
+    // Top level layout, puts the sliders to the left of the frame/GL widget
+    TQHBoxLayout* hlayout = new TQHBoxLayout( this, 20, 20, "hlayout");
+    hlayout->setMenuBar( m );
+    hlayout->addLayout( vlayout );
+    hlayout->addWidget( f1, 1 );
+
+}
diff --git a/examples/opengl/texture/globjwin.h b/examples/opengl/texture/globjwin.h
new file mode 100644
index 000000000..98dad489e
--- /dev/null
+++ b/examples/opengl/texture/globjwin.h
@@ -0,0 +1,32 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** The GLObjectWindow contains a GLBox and three sliders connected to
+** the GLBox's rotation slots.
+**
+****************************************************************************/
+
+#ifndef GLOBJWIN_H
+#define GLOBJWIN_H
+
+#include <qwidget.h>
+
+
+class GLObjectWindow : public TQWidget
+{
+    Q_OBJECT
+public:
+    GLObjectWindow( TQWidget* parent = 0, const char* name = 0 );
+
+};
+
+
+#endif // GLOBJWIN_H
diff --git a/examples/opengl/texture/gltexobj.cpp b/examples/opengl/texture/gltexobj.cpp
new file mode 100644
index 000000000..483a18843
--- /dev/null
+++ b/examples/opengl/texture/gltexobj.cpp
@@ -0,0 +1,240 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget demonstrating the use of TQImages for textures.
+**
+** Much of the GL code is inspired by the 'spectex' and 'texcyl' 
+** public domain demo programs by Brian Paul.
+**
+****************************************************************************/
+
+#include "gltexobj.h"
+#include <qimage.h>
+#include <qtimer.h>
+
+
+const int redrawWait = 50;
+
+/*!
+  Create a GLTexobj widget
+*/
+
+GLTexobj::GLTexobj( TQWidget* parent, const char* name )
+    : TQGLWidget( parent, name )
+{
+    xRot = yRot = zRot = 0.0;		// default object rotation
+    scale = 5.0;			// default object scale
+    object = 0;
+    animation = TRUE;
+    timer = new TQTimer( this );
+    connect( timer, SIGNAL(timeout()), SLOT(update()) );
+    timer->start( redrawWait, TRUE );
+}
+
+
+/*!
+  Release allocated resources
+*/
+
+GLTexobj::~GLTexobj()
+{
+    makeCurrent();
+    glDeleteLists( object, 1 );
+}
+
+
+/*!
+  Paint the texobj. The actual openGL commands for drawing the texobj are
+  performed here.
+*/
+
+void GLTexobj::paintGL()
+{
+    if ( animation ) {
+	xRot += 1.0;
+	yRot += 2.5;
+	zRot -= 5.0;
+    }
+    glClear( GL_COLOR_BUFFER_BIT );
+    glPushMatrix();
+    glRotatef( xRot, 1.0, 0.0, 0.0 ); 
+    glRotatef( yRot, 0.0, 1.0, 0.0 ); 
+    glRotatef( zRot, 0.0, 0.0, 1.0 );
+    glScalef( scale, scale, scale );
+    glCallList( object );
+    glPopMatrix();
+
+    if ( animation ) {
+	glFlush(); // Make sure everything is drawn before restarting timer
+	timer->start( redrawWait, TRUE ); // Wait this many msecs before redraw
+    }
+}
+
+
+/*!
+  Set up the OpenGL rendering state, and define display list
+*/
+
+void GLTexobj::initializeGL()
+{
+    // Set up the lights
+
+    GLfloat whiteDir[4] = {2.0, 2.0, 2.0, 1.0};
+    GLfloat whiteAmb[4] = {1.0, 1.0, 1.0, 1.0};
+    GLfloat lightPos[4] = {30.0, 30.0, 30.0, 1.0};
+
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+    glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_FALSE);
+    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, whiteAmb);
+
+    glMaterialfv(GL_FRONT, GL_DIFFUSE, whiteDir);
+    glMaterialfv(GL_FRONT, GL_SPECULAR, whiteDir);
+    glMaterialf(GL_FRONT, GL_SHININESS, 20.0);
+
+    glLightfv(GL_LIGHT0, GL_DIFFUSE, whiteDir);		// enable diffuse
+    glLightfv(GL_LIGHT0, GL_SPECULAR, whiteDir);	// enable specular
+    glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
+
+    // Set up the textures
+
+    TQImage tex1, tex2, buf;
+
+    if ( !buf.load( "gllogo.bmp" ) ) {	// Load first image from file
+	qWarning( "Could not read image file, using single-color instead." );
+	TQImage dummy( 128, 128, 32 );
+	dummy.fill( TQt::green.rgb() );
+	buf = dummy;
+    }
+    tex1 = TQGLWidget::convertToGLFormat( buf );  // flipped 32bit RGBA
+
+    if ( !buf.load( "qtlogo.bmp" ) ) {	// Load first image from file
+	qWarning( "Could not read image file, using single-color instead." );
+	TQImage dummy( 128, 128, 32 );
+	dummy.fill( TQt::red.rgb() );
+	buf = dummy;
+    }
+    tex2 = TQGLWidget::convertToGLFormat( buf );  // flipped 32bit RGBA
+
+    glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+    glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+    glEnable( GL_TEXTURE_2D );
+
+    // Set up various other stuff
+
+    glClearColor( 0.0, 0.0, 0.0, 0.0 ); // Let OpenGL clear to black
+    glEnable( GL_CULL_FACE );  	// don't need Z testing for convex objects
+    glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
+
+    // Make the object display list
+
+    object = makeObject( tex1, tex2 );	// Generate an OpenGL display list
+}
+
+
+
+/*!
+  Set up the OpenGL view port, matrix mode, etc.
+*/
+
+void GLTexobj::resizeGL( int w, int h )
+{
+    glViewport( 0, 0, w, h );
+    glMatrixMode( GL_PROJECTION );
+    glLoadIdentity();
+    glFrustum( -1.0, 1.0, -1.0, 1.0, 10.0, 100.0 );
+    glMatrixMode( GL_MODELVIEW );
+    glLoadIdentity();
+    glTranslatef( 0.0, 0.0, -70.0 );
+}
+
+
+/*!
+  Generate an OpenGL display list for the object to be shown, i.e. the texobj
+*/
+
+GLuint GLTexobj::makeObject( const TQImage& tex1, const TQImage& tex2 )
+{
+    GLUquadricObj* q = gluNewQuadric();
+    GLuint cylinderObj = glGenLists(1);
+    glNewList( cylinderObj, GL_COMPILE );
+
+    glTranslatef( 0.0, 0.0, -1.0 );
+
+    // cylinder
+    glTexImage2D( GL_TEXTURE_2D, 0, 3, tex1.width(), tex1.height(), 0,
+		  GL_RGBA, GL_UNSIGNED_BYTE, tex1.bits() );
+    gluQuadricTexture( q, GL_TRUE );
+    gluCylinder(q, 0.6, 0.6, 2.0, 24, 1);
+
+    // end cap
+    glTexImage2D( GL_TEXTURE_2D, 0, 3, tex2.width(), tex2.height(), 0,
+		  GL_RGBA, GL_UNSIGNED_BYTE, tex2.bits() );
+    glTranslatef( 0.0, 0.0, 2.0 );
+    gluDisk( q, 0.0, 0.6, 24, 1 );
+
+    // other end cap
+    glTranslatef( 0.0, 0.0, -2.0 );
+    gluQuadricOrientation( q, (GLenum)GLU_INSIDE );
+    gluDisk( q, 0.0, 0.6, 24, 1 );
+
+    glEndList();
+    gluDeleteQuadric( q );
+
+    return cylinderObj;
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the X axis.
+*/
+
+void GLTexobj::setXRotation( int degrees )
+{
+    xRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Y axis.
+*/
+
+void GLTexobj::setYRotation( int degrees )
+{
+    yRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Set the rotation angle of the object to \e degrees around the Z axis.
+*/
+
+void GLTexobj::setZRotation( int degrees )
+{
+    zRot = (GLfloat)(degrees % 360);
+    updateGL();
+}
+
+
+/*!
+  Turns animation on or off
+*/
+
+void GLTexobj::toggleAnimation()
+{
+    animation = !animation;
+    if ( animation )
+	updateGL();
+    else
+	timer->stop();
+}
diff --git a/examples/opengl/texture/gltexobj.h b/examples/opengl/texture/gltexobj.h
new file mode 100644
index 000000000..9fa368376
--- /dev/null
+++ b/examples/opengl/texture/gltexobj.h
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** This is a simple TQGLWidget displaying an openGL wireframe box
+**
+****************************************************************************/
+
+#ifndef GLTEXOBJ_H
+#define GLTEXOBJ_H
+
+#include <qgl.h>
+
+
+class GLTexobj : public TQGLWidget
+{
+    Q_OBJECT
+
+public:
+
+    GLTexobj( TQWidget* parent, const char* name );
+    ~GLTexobj();
+
+public slots:
+
+    void		setXRotation( int degrees );
+    void		setYRotation( int degrees );
+    void		setZRotation( int degrees );
+    void		toggleAnimation();
+
+protected:
+
+    void		initializeGL();
+    void		paintGL();
+    void		resizeGL( int w, int h );
+
+    virtual GLuint 	makeObject( const TQImage& tex1, const TQImage& tex2 );
+
+private:
+    bool animation;
+    GLuint object;
+    GLfloat xRot, yRot, zRot, scale;
+    TQTimer* timer;
+};
+
+
+#endif // GLTEXOBJ_H
diff --git a/examples/opengl/texture/main.cpp b/examples/opengl/texture/main.cpp
new file mode 100644
index 000000000..4798bc16d
--- /dev/null
+++ b/examples/opengl/texture/main.cpp
@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of an example program for TQt.  This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// TQt OpenGL example: Texture
+//
+// File: main.cpp
+//
+// The main() function 
+// 
+
+#include "globjwin.h"
+#include <qapplication.h>
+#include <qgl.h>
+
+/*
+  The main program is here. 
+*/
+
+int main( int argc, char **argv )
+{
+    TQApplication::setColorSpec( TQApplication::CustomColor );
+    TQApplication a(argc,argv);
+
+    if ( !TQGLFormat::hasOpenGL() ) {
+	qWarning( "This system has no OpenGL support. Exiting." );
+	return -1;
+    }
+    
+    GLObjectWindow* w = new GLObjectWindow;
+    w->resize( 400, 350 );
+    a.setMainWidget( w );
+    w->show();
+    int result = a.exec();
+    delete w;
+    return result;
+}
diff --git a/examples/opengl/texture/qtlogo.bmp b/examples/opengl/texture/qtlogo.bmp
new file mode 100644
index 000000000..b7f9215d9
--- /dev/null
+++ b/examples/opengl/texture/qtlogo.bmp
diff --git a/examples/opengl/texture/texture.doc b/examples/opengl/texture/texture.doc
new file mode 100644
index 000000000..28f1d3fbd
--- /dev/null
+++ b/examples/opengl/texture/texture.doc
@@ -0,0 +1,10 @@
+/*!   \page opengl-texture-example.html
+
+  \ingroup opengl-examples
+  \title OpenGL Texture Example
+
+This example program demonstrates how to use OpenGL 2D textures.
+
+See \c{$QTDIR/examples/opengl/texture} for the source code.
+
+*/
diff --git a/examples/opengl/texture/texture.pro b/examples/opengl/texture/texture.pro
new file mode 100644
index 000000000..a9a31b8ee
--- /dev/null
+++ b/examples/opengl/texture/texture.pro
@@ -0,0 +1,14 @@
+TEMPLATE	= app
+TARGET		= texture
+
+CONFIG		+= qt opengl warn_on release
+CONFIG -= dlopen_opengl
+DEPENDPATH	= ../include
+
+REQUIRES        = opengl
+
+HEADERS		= gltexobj.h \
+		  globjwin.h
+SOURCES		= gltexobj.cpp \
+		  globjwin.cpp \
+		  main.cpp