Long live Qt!

6 files changed, 1608 insertions, 0 deletions

diff --git a/examples/qws/ahigl/ahigl.pro b/examples/qws/ahigl/ahigl.pro
new file mode 100644
index 0000000..1ee8e6e
--- /dev/null
+++ b/examples/qws/ahigl/ahigl.pro
@@ -0,0 +1,16 @@
+TEMPLATE = lib
+QT += opengl
+CONFIG += plugin
+
+TARGET	 = qahiglscreen
+
+target.path = $$[QT_INSTALL_PLUGINS]/gfxdrivers
+INSTALLS += target
+
+HEADERS	= qwindowsurface_ahigl_p.h \
+          qscreenahigl_qws.h
+
+SOURCES	= qwindowsurface_ahigl.cpp \
+          qscreenahigl_qws.cpp \
+          qscreenahiglplugin.cpp
+
diff --git a/examples/qws/ahigl/qscreenahigl_qws.cpp b/examples/qws/ahigl/qscreenahigl_qws.cpp
new file mode 100644
index 0000000..b5880b3
--- /dev/null
+++ b/examples/qws/ahigl/qscreenahigl_qws.cpp
@@ -0,0 +1,963 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qscreenahigl_qws.h"
+#include "qwindowsurface_ahigl_p.h"
+
+#include <QWSServer>
+#include <QMap>
+#include <QTimer>
+#include <QTimeLine>
+
+#include <qwindowsystem_qws.h>
+#include <private/qwindowsurface_qws_p.h>
+#include <private/qfixed_p.h>
+
+#include <GLES/egl.h>
+#include <GLES/gl.h>
+#include <math.h>
+
+const int animationLength = 1500;
+const int frameSpan = 20;
+
+static GLuint createTexture(const QImage &img);
+
+class QAhiGLCursor : public QScreenCursor
+{
+public:
+    QAhiGLCursor() : texture(0) {}
+    ~QAhiGLCursor();
+
+    void set(const QImage &image, int hotx, int hoty);
+
+    GLuint texture;
+};
+
+QAhiGLCursor::~QAhiGLCursor()
+{
+    if (texture)
+        glDeleteTextures(1, &texture);
+}
+
+void QAhiGLCursor::set(const QImage &image, int hotx, int hoty)
+{
+    if (texture)
+        glDeleteTextures(1, &texture);
+
+    if (image.isNull())
+        texture = 0;
+    else
+        texture = createTexture(image.convertToFormat(QImage::Format_ARGB32));
+
+    QScreenCursor::set(image, hotx, hoty);
+}
+
+
+/*!
+  \class QAhiGLScreenPrivate
+  The QAhiGLScreenPrivate class contains state information for class QAhiGLScreen.
+
+  An instance of this class points to the owning instance of
+  class QAhiGLScreen. This class uses a QTimer to limit the
+  update frequency.
+ */
+//! [0]
+class QAhiGLScreenPrivate : public QObject
+{
+    Q_OBJECT
+
+public:
+    QAhiGLScreenPrivate(QAhiGLScreen *s);
+
+public slots:
+    void windowEvent(QWSWindow *w, QWSServer::WindowEvent e);
+    void redrawScreen();
+
+public:
+    QAhiGLScreen *screen;
+    QAhiGLCursor *cursor;
+
+    EGLContext eglContext;
+    EGLDisplay eglDisplay;
+    EGLSurface eglSurface;
+
+    QTimer updateTimer;
+    bool doEffects;
+};
+//! [0]
+
+//! [1]
+class ShowAnimation : public QTimeLine
+{
+public:
+    ShowAnimation(QAhiGLScreenPrivate *screen);
+    qreal valueForTime(int msec);
+};
+//! [1]
+
+//! [2]
+struct WindowInfo
+{
+    WindowInfo() : texture(0), animation(0) {}
+
+    GLuint texture;
+    QPointer<ShowAnimation> animation;
+};
+
+static QMap<QWSWindow*, WindowInfo*> windowMap;
+//! [2]
+
+/*!
+  Constructs the animation for the transition effect used
+  when the window associated with \a screen is displayed.
+ */
+//! [3]
+ShowAnimation::ShowAnimation(QAhiGLScreenPrivate *screen)
+    : QTimeLine(animationLength)
+{
+    setUpdateInterval(frameSpan);
+    connect(this, SIGNAL(valueChanged(qreal)), screen, SLOT(redrawScreen()));
+    connect(this, SIGNAL(finished()), this, SLOT(deleteLater()));
+    start();
+}
+//! [3]
+
+//! [4]
+qreal ShowAnimation::valueForTime(int msec)
+{
+    const qreal t = msec / qreal(duration());
+    return 3*t*t - 2*t*t*t;
+}
+//! [4]
+
+QAhiGLScreenPrivate::QAhiGLScreenPrivate(QAhiGLScreen *s)
+    : screen(s), cursor(0), doEffects(false)
+{
+    connect(&updateTimer, SIGNAL(timeout()), this, SLOT(redrawScreen()));
+}
+
+/*!
+  This slot handles the \a event when the \l {QWSServer}
+  {window server} emits a window event for the specified
+  \a window.
+
+  The \l {QWSServer::WindowEvent} {window events} handled
+  are \c Create, \c Destroy, and \c Show. The \c Create
+  event creates a new instance of \l {WindowInfo} and stores
+  it in a window map to mark the creation of a new window.
+  The \c Destroy event causes the \l {WindoInfo} instance
+  to be removed from the map and destroyed.
+
+  The \c Show event is the most interesting. If the user
+  has started the application with -display ahigl:effects,
+  then the \c Show event is handled by creating a small
+  \l {ShowAnimation} {animation} for use when the window
+  is first shown.
+ */
+//! [5]
+void QAhiGLScreenPrivate::windowEvent(QWSWindow *window,
+                                      QWSServer::WindowEvent event)
+{
+    switch (event) {
+    case QWSServer::Create:
+        windowMap[window] = new WindowInfo;
+        break;
+    case QWSServer::Show:
+        if (doEffects)
+            windowMap[window]->animation = new ShowAnimation(this);
+        break;
+    case QWSServer::Destroy:
+        delete windowMap[window];
+        windowMap.remove(window);
+        break;
+    default:
+        break;
+    }
+}
+//! [5]
+
+/*!
+  This function assumes the updateTimer is still counting down and stops it
+  and then calls redrawScreen() in the public screen driver class QAhiGLScreen.
+ */
+//! [6]
+void QAhiGLScreenPrivate::redrawScreen()
+{
+    updateTimer.stop();
+    screen->redrawScreen();
+}
+//! [6]
+
+/*!
+  \class QAhiGLScreen
+
+  \brief The QAhiGLScreen class is the screen driver for the ATI handheld device interface.
+
+  QAhiGLScreen is implemented with the d-pointer pattern. That is,
+  the only data member the class contains is a pointer called d_ptr,
+  which means data pointer. It points to an instance of a private
+  class called QAhiGLScreenPrivate, where all the screen driver's
+  context data members are defined. The d-pointer pattern is used
+  so that changes can be made to the screen driver's context data
+  members without destroying the binary compatibility of the public
+  screen driver class.
+
+  The pure virtual functions found in the base class QScreen are
+  listed below. All must have implementations in any screen driver
+  class derived from QScreen. All are impemented in this example,
+  except for setMode(), which has only been given a stub
+  implementation to satisfy the compiler.
+
+  bool connect(const QString & displaySpec);
+  void disconnect();
+  bool initDevice();
+  void setMode(int width, int height, int depth);
+
+  The stub implementation of setMode() is not meant to indicate
+  setMode() can be ignored in your own screen driver class. It was
+  simply decided not to provide a fully implemented screen driver
+  class for the example, which would normally be tailored to your
+  device's specific requirements.
+
+  The base class QGLScreen has only one pure virtual function,
+  hasOpenGL(), which must return true if your screen driver class
+  supports OpenGL.
+
+  QWSWindowSurface * createSurface(const QString & key) const
+  QWSWindowSurface * createSurface(QWidget * widget) const
+  void exposeRegion(QRegion region, int windowIndex)
+
+ */
+
+/*!
+  Constructs a new, ATI handheld device screen driver.
+
+  The displayId identifies the QWS server to connect to.
+ */
+QAhiGLScreen::QAhiGLScreen(int displayId) : QGLScreen(displayId)
+{
+    d_ptr = new QAhiGLScreenPrivate(this);
+    d_ptr->eglDisplay = EGL_NO_DISPLAY;
+    d_ptr->eglSurface = EGL_NO_SURFACE;
+}
+
+/*!
+  Destroys this ATI handheld device screen driver.
+ */
+QAhiGLScreen::~QAhiGLScreen()
+{
+    delete d_ptr;
+}
+
+/*!
+  \reimp
+ */
+//! [7]
+bool QAhiGLScreen::connect(const QString &displaySpec)
+{
+    // Hardcoded values for this device
+    w = 480;
+    h = 640;
+    dw = w;
+    dh = h;
+    d = 16;
+
+    const int dpi = 120;
+    physWidth = qRound(dw * 25.4 / dpi);
+    physHeight = qRound(dh * 25.4 / dpi);
+
+    if (displaySpec.section(':', 1, 1).contains("effects"))
+        d_ptr->doEffects = true;
+
+    return true;
+}
+//! [7]
+
+/*!
+  \reimp
+ */
+//! [8]
+bool QAhiGLScreen::initDevice()
+{
+    EGLint version, subversion;
+    EGLint attrs[] = { EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+                       EGL_STENCIL_SIZE, 8, EGL_DEPTH_SIZE, 16,
+                       EGL_NONE };
+    EGLint numConfig;
+    EGLConfig eglConfig;
+
+    d_ptr->eglDisplay = eglGetDisplay(0);
+    if (d_ptr->eglDisplay == EGL_NO_DISPLAY) {
+        qCritical("QAhiGLScreen::initDevice(): eglGetDisplay failed: 0x%x",
+                  eglGetError());
+        return false;
+    }
+
+    if (!eglInitialize(d_ptr->eglDisplay, &version, &subversion)) {
+        qCritical("QAhiGLScreen::initDevice(): eglInitialize failed: 0x%x",
+                  eglGetError());
+        return false;
+    }
+
+    if (!eglChooseConfig(d_ptr->eglDisplay, attrs, &eglConfig, 1, &numConfig)) {
+        qCritical("QAhiGLScreen::initDevice(): eglChooseConfig failed: 0x%x",
+                  eglGetError());
+        return false;
+    }
+
+    static DummyScreen win = { w, h };
+    d_ptr->eglSurface = eglCreateWindowSurface(d_ptr->eglDisplay, eglConfig,
+                                               &win, 0);
+    if (d_ptr->eglSurface == EGL_NO_SURFACE) {
+        qCritical("QAhiGLScreen::initDevice(): eglCreateWindowSurface failed: 0x%x",
+                  eglGetError());
+        return false;
+    }
+
+    d_ptr->eglContext = eglCreateContext(d_ptr->eglDisplay, eglConfig,
+                                         EGL_NO_CONTEXT, 0);
+    if (d_ptr->eglContext == EGL_NO_CONTEXT) {
+        qCritical("QAhiGLScreen::initDevice(): eglCreateContext failed: 0x%x",
+                  eglGetError());
+        return false;
+    }
+
+    if (!eglMakeCurrent(d_ptr->eglDisplay, d_ptr->eglSurface, d_ptr->eglSurface, d_ptr->eglContext)) {
+        qCritical("QAhiGLScreen::initDevice(): eglMakeCurrent failed: 0x%x",
+                  eglGetError());
+        return false;
+    }
+
+    d_ptr->connect(QWSServer::instance(),
+                   SIGNAL(windowEvent(QWSWindow*, QWSServer::WindowEvent)),
+                   SLOT(windowEvent(QWSWindow*, QWSServer::WindowEvent)));
+
+    d_ptr->cursor = new QAhiGLCursor;
+    qt_screencursor = d_ptr->cursor;
+
+    return true;
+}
+//! [8]
+
+/*!
+  \reimp
+ */
+//! [9]
+void QAhiGLScreen::shutdownDevice()
+{
+    delete d_ptr->cursor;
+    d_ptr->cursor = 0;
+    qt_screencursor = 0;
+
+    eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE,
+                   EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    eglDestroyContext(d_ptr->eglDisplay, d_ptr->eglContext);
+    eglDestroySurface(d_ptr->eglDisplay, d_ptr->eglSurface);
+    eglTerminate(d_ptr->eglDisplay);
+}
+//! [9]
+
+/*!
+  \reimp
+
+  In this case, the reimplimentation does nothing. It is
+  required because the function is declared as pure virtual
+  in the base class QScreen.
+ */
+void QAhiGLScreen::disconnect()
+{
+}
+
+/*
+  This internal function rounds up to the next power of
+  two. If v is already a power of two, that same value is
+  returned.
+ */
+inline static uint nextPowerOfTwo(uint v)
+{
+    v--;
+    v |= v >> 1;
+    v |= v >> 2;
+    v |= v >> 4;
+    v |= v >> 8;
+    v |= v >> 16;
+    ++v;
+    return v;
+}
+
+/*
+  This internal function creates a texture from the image img
+  and returns its texture identifier.
+
+  The term "texture" is a graphics technology term that refers
+  to a pixmap constructed from an image by adding extra points
+  of contrast to the otherwise plain color image. The texture
+  has a, well, texture, that the original image doesn't have.
+ */
+static GLuint createTexture(const QImage &img)
+{
+    if (img.isNull())
+        return 0;
+
+    int width = img.width();
+    int height = img.height();
+    int textureWidth;
+    int textureHeight;
+    GLuint texture;
+
+    glGenTextures(1, &texture);
+    textureWidth = nextPowerOfTwo(width);
+    textureHeight = nextPowerOfTwo(height);
+    glBindTexture(GL_TEXTURE_2D, texture);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    switch (img.format()) {
+    case QImage::Format_RGB16:
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
+                     textureWidth,
+                     textureHeight, 0,
+                     GL_RGB, GL_UNSIGNED_SHORT_5_6_5, 0);
+
+        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
+                        GL_RGB, GL_UNSIGNED_SHORT_5_6_5, img.bits());
+        break;
+
+    case QImage::Format_ARGB32_Premultiplied:
+    case QImage::Format_ARGB32:
+    case QImage::Format_RGB32:
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
+                     textureWidth,
+                     textureHeight, 0,
+                     GL_RGBA, GL_UNSIGNED_BYTE, 0);
+        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height,
+                        GL_RGBA, GL_UNSIGNED_BYTE, img.bits());
+        break;
+
+    default:
+        break;
+    }
+
+    return texture;
+}
+
+/*
+  A helper function used by QAhiGLScreen::drawQuad().
+ */
+static void drawQuad_helper(GLshort *coords, GLfloat *texCoords)
+{
+    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glVertexPointer(2, GL_SHORT, 0, coords);
+    glEnable(GL_TEXTURE_2D);
+    glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+    glDisable(GL_TEXTURE_2D);
+    glDisableClientState(GL_VERTEX_ARRAY);
+    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+}
+
+/*
+  A helper function used by QAhiGLScreen::drawQuadWavyFlag().
+ */
+static void drawQuad_helper(GLshort *coords, GLfloat *texCoords,
+                            int arraySize, int numArrays)
+{
+    glEnable(GL_TEXTURE_2D);
+    glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+    glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
+    glEnableClientState(GL_VERTEX_ARRAY);
+    glVertexPointer(2, GL_SHORT, 0, coords);
+
+    for (int i = 0; i < numArrays-1; ++i)
+        glDrawArrays(GL_TRIANGLE_STRIP, i*arraySize, arraySize);
+    glDisableClientState(GL_VERTEX_ARRAY);
+    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+    glDisable(GL_TEXTURE_2D);
+}
+
+/*
+  A convenience function used by QAhiGLScreen::drawQuad().
+ */
+static void setRectCoords(GLshort *coords, QRect rect)
+{
+    coords[0] = GLshort(rect.left());
+    coords[1] = GLshort(rect.top());
+
+    coords[2] = GLshort(rect.right());
+    coords[3] = GLshort(rect.top());
+
+    coords[4] = GLshort(rect.right());
+    coords[5] = GLshort(rect.bottom());
+
+    coords[6] = GLshort(rect.left());
+    coords[7] = GLshort(rect.bottom());
+}
+
+/*!
+  A helper function used by QAhiGLScreen::drawWindow() and
+  QAhiGLScreen::redrawScreen().
+ */
+void QAhiGLScreen::drawQuad(const QRect &textureGeometry,
+                            const QRect &subGeometry,
+                            const QRect &screenGeometry)
+{
+    qreal textureWidth = qreal(nextPowerOfTwo(textureGeometry.width()));
+    qreal textureHeight = qreal(nextPowerOfTwo(textureGeometry.height()));
+
+    GLshort coords[8];
+    setRectCoords(coords, screenGeometry);
+
+    GLfloat texcoords[8];
+    texcoords[0] = (subGeometry.left() - textureGeometry.left()) / textureWidth;
+    texcoords[1] = (subGeometry.top() - textureGeometry.top()) / textureHeight;
+
+    texcoords[2] = (subGeometry.right() - textureGeometry.left()) / textureWidth;
+    texcoords[3] = (subGeometry.top() - textureGeometry.top()) / textureHeight;
+
+    texcoords[4] = (subGeometry.right() - textureGeometry.left()) / textureWidth;
+    texcoords[5] = (subGeometry.bottom() - textureGeometry.top()) / textureHeight;
+
+    texcoords[6] = (subGeometry.left() - textureGeometry.left()) / textureWidth;
+    texcoords[7] = (subGeometry.bottom() - textureGeometry.top()) / textureHeight;
+
+    drawQuad_helper(coords, texcoords);
+}
+
+/*
+  My own sine function.
+ */
+static qreal mySin(QFixed radians)
+{
+    const QFixed twoPI = QFixed::fromReal(2*M_PI);
+
+    const int tableSize = 40;
+    static int *table = 0;
+
+    if (!table) {
+        table = new int[tableSize];
+        for (int i = 0; i < tableSize; ++i) {
+            table[i] = qRound(sin(M_PI*(i*360.0/40.0)/180.0) * 16776960.0);
+        }
+    }
+
+    QFixed tableLookup = radians*tableSize/twoPI;
+    return table[tableLookup.truncate()%tableSize]/16776960.0;
+}
+
+/*
+  My own cosine function.
+ */
+static qreal myCos(QFixed radians)
+{
+    const int twoPI = qRound(2*M_PI);
+
+    const int tableSize = 40;
+    static int *table = 0;
+
+    if (!table) {
+        table = new int[tableSize];
+        for (int i = 0; i < tableSize; ++i) {
+            table[i] = int(cos(M_PI*(i*360.0/40.0)/180.0) * 16776960.0);
+        }
+    }
+
+    QFixed tableLookup = radians*tableSize/twoPI;
+    return table[tableLookup.truncate()%tableSize]/16776960.0;
+}
+
+// number of grid cells in wavy flag tesselation in x- and y-direction
+const int subdivisions = 10;
+
+/*
+  A helper function used by drawQuadWavyFlag(). It computes
+  coordinates for grid cells for a wavy flag tesselation and
+  stores them in the array called coords.
+ */
+static void setFlagCoords(GLshort *coords,
+			  QRectF screenGeometry,
+                          int frameNum,
+			  qreal progress)
+{
+    int coordIndex = 0;
+    qreal waveHeight = 30.0*(1.0-progress);
+    for (int j = 0; j < subdivisions-1; ++j) {
+        for (int i = 0; i < subdivisions; ++i) {
+            qreal c;
+            c = screenGeometry.left()
+                + (i * screenGeometry.width() / (subdivisions - 1))
+                + waveHeight * qRound(mySin(QFixed::fromReal(M_PI * 20 * (frameNum + i) / 180.0)))
+                + waveHeight * qRound(myCos(QFixed::fromReal(M_PI * 20 * (frameNum + j) / 180.0)));
+            coords[coordIndex++] = qRound(c);
+            c = screenGeometry.top()
+                + (j * screenGeometry.height() / (subdivisions - 1))
+                + waveHeight * mySin(QFixed::fromReal(M_PI * 20 * (frameNum + i) / 180.0))
+                + waveHeight * myCos(QFixed::fromReal(M_PI * 20 * (frameNum + j) / 180.0));
+            coords[coordIndex++] = qRound(c);
+            c = screenGeometry.left() + (i * screenGeometry.width() / (subdivisions - 1))
+                + waveHeight * mySin(QFixed::fromReal(M_PI * 20 * (frameNum + i) / 180.0))
+                + waveHeight * myCos(QFixed::fromReal(M_PI * 20 * (frameNum + (j+1)) / 180.0));
+            coords[coordIndex++] = qRound(c);
+
+            c = screenGeometry.top()
+                + ((j + 1) * screenGeometry.height() / (subdivisions - 1))
+                + waveHeight * mySin(QFixed::fromReal(M_PI * 20 * (frameNum + i) / 180.0))
+                + waveHeight * myCos(QFixed::fromReal(M_PI * 20 * (frameNum + (j + 1)) / 180.0));
+            coords[coordIndex++] = qRound(c);
+        }
+    }
+}
+
+static void setFlagTexCoords(GLfloat *texcoords,
+                             const QRectF &subTexGeometry,
+                             const QRectF &textureGeometry,
+                             int textureWidth, int textureHeight)
+{
+    qreal topLeftX = (subTexGeometry.left() - textureGeometry.left())/textureWidth;
+    qreal topLeftY = (textureGeometry.height() - (subTexGeometry.top() - textureGeometry.top()))/textureHeight;
+
+    qreal width = (subTexGeometry.right() - textureGeometry.left())/textureWidth - topLeftX;
+    qreal height = (textureGeometry.height() - (subTexGeometry.bottom() - textureGeometry.top()))/textureHeight - topLeftY;
+
+    int coordIndex = 0;
+    qreal spacing = subdivisions - 1;
+    for (int j = 0; j < subdivisions-1; ++j) {
+        for (int i = 0; i < subdivisions; ++i) {
+            texcoords[coordIndex++] = topLeftX + (i*width) / spacing;
+            texcoords[coordIndex++] = topLeftY + (j*height) / spacing;
+            texcoords[coordIndex++] = topLeftX + (i*width) / spacing;
+            texcoords[coordIndex++] = topLeftY + ((j+1)*height) / spacing;
+        }
+    }
+}
+
+void QAhiGLScreen::drawQuadWavyFlag(const QRect &textureGeometry,
+                                    const QRect &subTexGeometry,
+                                    const QRect &screenGeometry,
+                                    qreal progress)
+{
+    const int textureWidth = nextPowerOfTwo(textureGeometry.width());
+    const int textureHeight = nextPowerOfTwo(textureGeometry.height());
+
+    static int frameNum = 0;
+
+    GLshort coords[subdivisions*subdivisions*2*2];
+    setFlagCoords(coords, screenGeometry, frameNum++, progress);
+
+    GLfloat texcoords[subdivisions*subdivisions*2*2];
+    setFlagTexCoords(texcoords, subTexGeometry, textureGeometry,
+                     textureWidth, textureHeight);
+
+    drawQuad_helper(coords, texcoords, subdivisions*2, subdivisions);
+}
+
+void QAhiGLScreen::invalidateTexture(int windowIndex)
+{
+    if (windowIndex < 0)
+        return;
+
+    QList<QWSWindow*> windows = QWSServer::instance()->clientWindows();
+    if (windowIndex > windows.size() - 1)
+        return;
+
+    QWSWindow *win = windows.at(windowIndex);
+    if (!win)
+        return;
+
+    WindowInfo *info = windowMap[win];
+    if (info->texture) {
+        glDeleteTextures(1, &info->texture);
+        info->texture = 0;
+    }
+}
+
+void QAhiGLScreen::drawWindow(QWSWindow *win, qreal progress)
+{
+    const QRect screenRect = win->allocatedRegion().boundingRect();
+    QRect drawRect = screenRect;
+
+    glColor4f(1.0, 1.0, 1.0, progress);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glEnable(GL_BLEND);
+
+    QWSWindowSurface *surface = win->windowSurface();
+    if (!surface)
+        return;
+
+    if (progress >= 1.0) {
+        if (surface->key() == QLatin1String("ahigl")) {
+            drawRect.setCoords(drawRect.left(), drawRect.bottom(),
+                               drawRect.right(), drawRect.top());
+        }
+        drawQuad(win->requestedRegion().boundingRect(), screenRect, drawRect);
+        return;
+    }
+
+    const int dx = qRound((1 - progress) * drawRect.width() / 2);
+    const int dy = qRound((1 - progress) * drawRect.height() / 2);
+
+    drawRect.adjust(dx, dy, -dx, -dy);
+
+    if (surface->key() != QLatin1String("ahigl")) {
+        drawRect.setCoords(drawRect.left(), drawRect.bottom(),
+                           drawRect.right(), drawRect.top());
+    }
+
+    drawQuadWavyFlag(win->requestedRegion().boundingRect(), screenRect,
+                     drawRect, progress);
+}
+
+/*!
+  The window compositions are constructed here.
+ */
+//! [10]
+void QAhiGLScreen::redrawScreen()
+{
+    glBindFramebufferOES(GL_FRAMEBUFFER_EXT, 0);
+    glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
+    glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glOrthof(0, w, h, 0, -999999, 999999);
+    glViewport(0, 0, w, h);
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+
+    // Fill background color
+
+    QColor bgColor = QWSServer::instance()->backgroundBrush().color();
+    glClearColor(bgColor.redF(), bgColor.greenF(),
+                 bgColor.blueF(), bgColor.alphaF());
+    glClear(GL_COLOR_BUFFER_BIT);
+//! [10]
+
+    // Draw all windows
+
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
+    glDisable(GL_STENCIL_TEST);
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_ONE, GL_ZERO);
+    glDisable(GL_ALPHA_TEST);
+    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+
+//! [11]
+    QList<QWSWindow*> windows = QWSServer::instance()->clientWindows();
+    for (int i = windows.size() - 1; i >= 0; --i) {
+        QWSWindow *win = windows.at(i);
+        QWSWindowSurface *surface = win->windowSurface();
+        if (!surface)
+            continue;
+
+        WindowInfo *info = windowMap[win];
+
+        if (!info->texture) {
+            if (surface->key() == QLatin1String("ahigl"))
+                info->texture = static_cast<QAhiGLWindowSurface*>(surface)->textureId();
+            else
+                info->texture = createTexture(surface->image());
+        }
+        qreal progress;
+        if (info->animation)
+            progress = info->animation->currentValue();
+        else
+            progress = 1.0;
+
+        glBindTexture(GL_TEXTURE_2D, info->texture);
+        drawWindow(win, progress);
+    } // for i
+//! [11] //! [12]
+
+    // Draw cursor
+
+    const QAhiGLCursor *cursor = d_ptr->cursor;
+    if (cursor->texture) {
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        glBindTexture(GL_TEXTURE_2D, d_ptr->cursor->texture);
+        drawQuad(cursor->boundingRect(), cursor->boundingRect(),
+                 cursor->boundingRect());
+    }
+
+    glPopMatrix();
+    glMatrixMode(GL_PROJECTION);
+    glPopMatrix();
+    glMatrixMode(GL_MODELVIEW);
+
+    eglSwapBuffers(d_ptr->eglDisplay, d_ptr->eglSurface);
+}
+//! [12]
+
+/*!
+  \reimp
+
+ */
+//! [13]
+void QAhiGLScreen::exposeRegion(QRegion r, int windowIndex)
+{
+    if ((r & region()).isEmpty())
+        return;
+
+    invalidateTexture(windowIndex);
+
+    if (!d_ptr->updateTimer.isActive())
+        d_ptr->updateTimer.start(frameSpan);
+}
+//! [13]
+
+/*!
+  \reimp
+
+  This overloading of createSurface() is called on the client side to
+  create a window surface for a new window. If the \a widget is a
+  QGLWidget, or if the widget's width and height are both less than or
+  equal to 256, it creates an instance of QAhiGLWindowSurface.
+  Otherwise, it calls QScreen::createSurface() to create a non-OpenGL
+  window surface. The pointer to the new window surface is returned.
+
+  Note that this function first asks whether this application is the
+  server, and it only creates an instance of QAhiGLWindowSurface if
+  the answer is yes. What this means is we only let the server have
+  access to the OpenGL hardware, because of an implementation
+  restyriction in the OpenGL libraries we are using. Thus only clients
+  that are in the server process get to create OpenGL window surfaces.
+ */
+//! [14]
+QWSWindowSurface* QAhiGLScreen::createSurface(QWidget *widget) const
+{
+    if (QApplication::type() == QApplication::GuiServer) {
+        if (qobject_cast<QGLWidget*>(widget)) {
+            return new QAhiGLWindowSurface(widget,
+					   d_ptr->eglDisplay,
+                                           d_ptr->eglSurface,
+                                           d_ptr->eglContext);
+        }
+
+        const QRect rect = widget->frameGeometry();
+        if (rect.width() <= 256 && rect.height() <= 256) {
+            return new QAhiGLWindowSurface(widget,
+					   d_ptr->eglDisplay,
+                                           d_ptr->eglSurface,
+                                           d_ptr->eglContext);
+        }
+    }
+
+    return QScreen::createSurface(widget);
+}
+//! [14]
+
+/*!
+  \reimp
+
+  This overloading of createSurface() is called on the server side
+  to manage a window surface corresponding to a window surface
+  already created on the client side.
+
+  If the \a key is "ahigl", create an instance of QAhiGLWindowSurface
+  and return it. Otherwise, call QScreen::createSurface() and return
+  the window surface it creates.
+
+  See QScreen::createSurface().
+ */
+//! [15]
+QWSWindowSurface* QAhiGLScreen::createSurface(const QString &key) const
+{
+    if (key == QLatin1String("ahigl")) {
+        return new QAhiGLWindowSurface(d_ptr->eglDisplay,
+				       d_ptr->eglSurface,
+                                       d_ptr->eglContext);
+    }
+
+    return QScreen::createSurface(key);
+}
+//! [15]
+
+/*!
+  This function would normally reset the frame buffer resolution
+  according to \a width, \a height, and the bit \a depth. It would
+  then notify other applications that their frame buffer size had
+  changed so they could redraw. The function is a no-op in this
+  example, which means the example screen driver can't change its
+  frame buffer resolution. There is no significance to that in the
+  example. You would normally implement setMode() in an OpenGL
+  screen driver. This no-op reimplementation is required here
+  because setMode() in QScreen is a pure virtual function.
+
+  See QScreen::setMode()
+ */
+void QAhiGLScreen::setMode(int width, int height, int depth)
+{
+    Q_UNUSED(width);
+    Q_UNUSED(height);
+    Q_UNUSED(depth);
+}
+
+/*!
+  This function would normally be reimplemented to prevent the
+  screen driver from updating the screen if \a on is true. It is a
+  no-op in this example, which means the screen driver can always
+  update the screen.
+
+  See QScreen::blank().
+ */
+void QAhiGLScreen::blank(bool on)
+{
+    Q_UNUSED(on);
+}
+
+/*!
+  This function always returns true, since the purpose of
+  this screen driver class is to implement an OpenGL ES
+  screen driver. In some other class designed to handle both
+  OpenGL and non-OpenGL graphics, it might test the system to
+  determine whether OpenGL graphics are supported and return
+  true or false accordingly.
+ */
+bool QAhiGLScreen::hasOpenGL()
+{
+    return true;
+}
+
+#include "qscreenahigl_qws.moc"
diff --git a/examples/qws/ahigl/qscreenahigl_qws.h b/examples/qws/ahigl/qscreenahigl_qws.h
new file mode 100644
index 0000000..332d5c3
--- /dev/null
+++ b/examples/qws/ahigl/qscreenahigl_qws.h
@@ -0,0 +1,91 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QAHIGLSCREEN_H
+#define QAHIGLSCREEN_H
+
+#include <QGLScreen>
+#include <QWSServer>
+
+QT_BEGIN_NAMESPACE
+class QAhiGLScreenPrivate;
+QT_END_NAMESPACE
+
+//! [0]
+class QAhiGLScreen : public QGLScreen
+{
+public:
+    QAhiGLScreen(int displayId);
+    virtual ~QAhiGLScreen();
+
+    bool initDevice();
+    bool connect(const QString &displaySpec);
+    void disconnect();
+    void shutdownDevice();
+
+    void setMode(int width, int height, int depth);
+    void blank(bool on);
+
+    void exposeRegion(QRegion r, int changing);
+
+    QWSWindowSurface* createSurface(QWidget *widget) const;
+    QWSWindowSurface* createSurface(const QString &key) const;
+
+    bool hasOpenGL();
+
+private:
+    void invalidateTexture(int windowIndex);
+    void redrawScreen();
+    void drawWindow(QWSWindow *win, qreal progress);
+    void drawQuad(const QRect &textureGeometry,
+                  const QRect &subGeometry,
+                  const QRect &screenGeometry);
+    void drawQuadWavyFlag(const QRect &textureGeometry,
+                          const QRect &subTexGeometry,
+                          const QRect &screenGeometry,
+                          float progress);
+
+    QAhiGLScreenPrivate *d_ptr;
+    friend class QAhiGLScreenPrivate;
+};
+//! [0]
+
+#endif // QAHIGLSCREEN_H
diff --git a/examples/qws/ahigl/qscreenahiglplugin.cpp b/examples/qws/ahigl/qscreenahiglplugin.cpp
new file mode 100644
index 0000000..828de82
--- /dev/null
+++ b/examples/qws/ahigl/qscreenahiglplugin.cpp
@@ -0,0 +1,97 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qscreenahigl_qws.h"
+
+#include <QScreenDriverPlugin>
+#include <QStringList>
+
+//! [0]
+class QAhiGLScreenPlugin : public QScreenDriverPlugin
+{
+public:
+    QAhiGLScreenPlugin();
+
+    QStringList keys() const;
+    QScreen *create(const QString&, int displayId);
+};
+//! [0]
+
+/*!
+  \class QAhiGLScreenPlugin
+  \brief The QAhiGLScreenPlugin class is the plugin for the ATI handheld device graphics driver.
+
+  QAhiGLScreenPlugin inherits QScreenDriverPlugin. See
+  \l{How to Create Qt Plugins} for details.
+ */
+
+/*!
+  This is the default constructor.
+ */
+QAhiGLScreenPlugin::QAhiGLScreenPlugin()
+    : QScreenDriverPlugin()
+{
+}
+
+/*!
+  Returns a string list containing the string "ahigl" which
+  is the only screen driver supported by this plugin.
+ */
+QStringList QAhiGLScreenPlugin::keys() const
+{
+    return (QStringList() << "ahigl");
+}
+
+/*!
+  Creates a screen driver of the kind specified by \a driver.
+  The \a displayId identifies the Qt for Embedded Linux server to connect to.
+ */
+QScreen* QAhiGLScreenPlugin::create(const QString& driver, int displayId)
+{
+    if (driver.toLower() != "ahigl")
+        return 0;
+
+    return new QAhiGLScreen(displayId);
+}
+
+//! [1]
+Q_EXPORT_PLUGIN2(qahiglscreen, QAhiGLScreenPlugin)
+//! [1]
diff --git a/examples/qws/ahigl/qwindowsurface_ahigl.cpp b/examples/qws/ahigl/qwindowsurface_ahigl.cpp
new file mode 100644
index 0000000..79924f9
--- /dev/null
+++ b/examples/qws/ahigl/qwindowsurface_ahigl.cpp
@@ -0,0 +1,349 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qwindowsurface_ahigl_p.h"
+#include "qscreenahigl_qws.h"
+
+#include <qwsdisplay_qws.h>
+#include <QtGui/QPaintDevice>
+#include <QtGui/QWidget>
+#include <QtOpenGL/private/qglpaintdevice_qws_p.h>
+#include <QtOpenGL/private/qgl_p.h>
+#include <GLES/gl.h>
+
+/*!
+  \class QAhiGLWindowSurfacePrivate
+  \internal
+
+  \brief The QAhiGLWindowSurfacePrivate class is the private implementation
+  class for class QAhiGLWindowSurface.
+
+  This class contains only state variables.
+  */
+//! [0]
+class QAhiGLWindowSurfacePrivate
+{
+public:
+    QAhiGLWindowSurfacePrivate(EGLDisplay eglDisplay,
+			       EGLSurface eglSurface,
+                               EGLContext eglContext);
+
+    QPaintDevice *device;
+
+    int textureWidth;
+    int textureHeight;
+
+    GLuint texture;
+    GLuint frameBufferObject;
+    GLuint depthbuf;
+
+    EGLDisplay display;
+    EGLSurface surface;
+    EGLContext context;
+};
+//! [0]
+
+/*!
+  The construct just sets statwe variables using the ones
+  provided.
+ */
+QAhiGLWindowSurfacePrivate::QAhiGLWindowSurfacePrivate(EGLDisplay eglDisplay,
+                                                       EGLSurface eglSurface,
+                                                       EGLContext eglContext)
+    : texture(0), frameBufferObject(0), depthbuf(0), display(eglDisplay),
+      surface(eglSurface), context(eglContext)
+{
+}
+
+inline static int nextPowerOfTwo(uint v)
+{
+    v--;
+    v |= v >> 1;
+    v |= v >> 2;
+    v |= v >> 4;
+    v |= v >> 8;
+    v |= v >> 16;
+    ++v;
+    return v;
+}
+
+/*!
+    \class QAhiGLWindowSurface
+    \preliminary
+    \internal
+
+    \brief The QAhiGLWindowSurface class provides the drawing area
+    for top-level windows using OpenGL for drawing on an ATI handheld
+    device.
+
+    In \l{Qt for Embedded Linux}, the default behavior for each client is to
+    render widgets into an area of memory. The server then displays
+    the contents of that memory on the screen. For ATI handheld
+    devices using OpenGL, QAhiGLWindowSurface is the window surface
+    class that allocates and manages the memory areas in the clients
+    and the server.
+
+    When a screen update is required, the server runs through all the
+    top-level windows that intersect with the region being updated,
+    ensuring that the clients have updated their window surfaces. Then
+    the server uses the screen driver to copy the contents of the
+    affected window surfaces into its composition and then display the
+    composition on the screen.
+
+    \tableofcontents
+
+    \section1 Pure Virtual Functions
+
+    There are two window surface instances for each top-level window.
+    One is used by the application when drawing a window, and the
+    other is used by the server application to make its copy for
+    building a window composition to send to the screen.
+
+    The key() function is implemented to uniquely identify this window
+    surface class as "ahigl", and the isValid() function is
+    implemented to determine whether the associated window is still
+    acceptable for representation by this window surface class.  It
+    must either be a window using an \l {QGLWidget} {OpenGL widget},
+    or it must be a window whose frame is no bigger than 256 x 256.
+
+    The setGeometry() function is implemented to change the geometry
+    of the frame buffer whenever the geometry of the associated
+    top-level window changes. The image() function is called by the
+    window system when building window compositions to return an image
+    of the top-level window.
+
+    The paintDevice() function is implemented to return the appropriate
+    paint device.
+
+    \section1 Virtual Functions
+
+    When painting onto the surface, the window system will always call
+    the beginPaint() function before any painting operations are
+    performed. It ensures that the correct frame buffer will be used
+    by the OpenGL library for painting operations. Likewise, the
+    endPaint() function is automatically called when the painting is
+    done, but it isn't implemented for this example.
+*/
+
+/*!
+  This is the client side constructor.
+ */
+//! [1]
+QAhiGLWindowSurface::QAhiGLWindowSurface(QWidget *widget,
+                                         EGLDisplay eglDisplay,
+                                         EGLSurface eglSurface,
+                                         EGLContext eglContext)
+    : QWSGLWindowSurface(widget)
+{
+    d_ptr = new QAhiGLWindowSurfacePrivate(eglDisplay, eglSurface, eglContext);
+    d_ptr->device = new QWSGLPaintDevice(widget);
+
+    setSurfaceFlags(QWSWindowSurface::Buffered);
+}
+//! [1]
+
+/*!
+  This is the server side constructor.
+ */
+//! [2]
+QAhiGLWindowSurface::QAhiGLWindowSurface(EGLDisplay eglDisplay,
+                                         EGLSurface eglSurface,
+                                         EGLContext eglContext)
+{
+    d_ptr = new QAhiGLWindowSurfacePrivate(eglDisplay, eglSurface, eglContext);
+    setSurfaceFlags(QWSWindowSurface::Buffered);
+}
+//! [2]
+
+/*!
+  The destructor deletes the OpenGL structures held by the
+  private implementation class, and then it deletes the
+  private implementation class.
+ */
+QAhiGLWindowSurface::~QAhiGLWindowSurface()
+{
+    if (d_ptr->texture)
+        glDeleteTextures(1, &d_ptr->texture);
+    if (d_ptr->depthbuf)
+        glDeleteRenderbuffersOES(1, &d_ptr->depthbuf);
+    if (d_ptr->frameBufferObject)
+        glDeleteFramebuffersOES(1, &d_ptr->frameBufferObject);
+
+    delete d_ptr;
+}
+
+/*!
+  This function changes the geometry of the frame buffer
+  to the geometry in \a rect. It is called whenever the
+  geometry of the associated top-level window changes. It
+  also rebuilds the window surface's texture and binds
+  the OpenGL identifier to the texture for use by the
+  OpenGL library.
+ */
+//! [3]
+void QAhiGLWindowSurface::setGeometry(const QRect &rect)
+{
+    QSize size = rect.size();
+
+    const QWidget *w = window();
+    if (w && !w->mask().isEmpty()) {
+        const QRegion region = w->mask()
+                               & rect.translated(-w->geometry().topLeft());
+        size = region.boundingRect().size();
+    }
+
+    if (geometry().size() != size) {
+
+        // Driver specific limitations:
+        //   FBO maximimum size of 256x256
+        //   Depth buffer required
+
+        d_ptr->textureWidth = qMin(256, nextPowerOfTwo(size.width()));
+        d_ptr->textureHeight = qMin(256, nextPowerOfTwo(size.height()));
+
+        glGenTextures(1, &d_ptr->texture);
+        glBindTexture(GL_TEXTURE_2D, d_ptr->texture);
+
+        glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+        const int bufSize = d_ptr->textureWidth * d_ptr->textureHeight * 2;
+        GLshort buf[bufSize];
+        memset(buf, 0, sizeof(GLshort) * bufSize);
+
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, d_ptr->textureWidth,
+                     d_ptr->textureHeight, 0,
+                     GL_RGBA, GL_UNSIGNED_BYTE, buf);
+
+        glGenRenderbuffersOES(1, &d_ptr->depthbuf);
+        glBindRenderbufferOES(GL_RENDERBUFFER_EXT, d_ptr->depthbuf);
+        glRenderbufferStorageOES(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT16,
+                                 d_ptr->textureWidth, d_ptr->textureHeight);
+
+        glGenFramebuffersOES(1, &d_ptr->frameBufferObject);
+        glBindFramebufferOES(GL_FRAMEBUFFER_EXT, d_ptr->frameBufferObject);
+
+        glFramebufferTexture2DOES(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
+                                  GL_TEXTURE_2D, d_ptr->texture, 0);
+        glFramebufferRenderbufferOES(GL_FRAMEBUFFER_EXT,
+                                     GL_DEPTH_ATTACHMENT_EXT,
+                                     GL_RENDERBUFFER_EXT, d_ptr->depthbuf);
+        glBindFramebufferOES(GL_FRAMEBUFFER_EXT, 0);
+    }
+
+    QWSGLWindowSurface::setGeometry(rect);
+}
+//! [3]
+
+/*!
+  Returns the window  surface's texture as a QByteArray.
+ */
+QByteArray QAhiGLWindowSurface::permanentState() const
+{
+    QByteArray array;
+    array.resize(sizeof(GLuint));
+
+    char *ptr = array.data();
+    reinterpret_cast<GLuint*>(ptr)[0] = textureId();
+    return array;
+}
+
+/*!
+  Sets the window surface's texture to \a data.
+ */
+void QAhiGLWindowSurface::setPermanentState(const QByteArray &data)
+{
+    const char *ptr = data.constData();
+    d_ptr->texture = reinterpret_cast<const GLuint*>(ptr)[0];
+}
+
+/*!
+  Returns the paint device being used for this window surface.
+ */
+QPaintDevice *QAhiGLWindowSurface::paintDevice()
+{
+    return d_ptr->device;
+}
+
+/*!
+  Returns the window surface's texture.
+ */
+GLuint QAhiGLWindowSurface::textureId() const
+{
+    return d_ptr->texture;
+}
+
+/*!
+  The \l {QWSServer} {window system} always calls this function
+  before any painting operations begin for this window surface.
+  It ensures that the correct frame buffer will be used by the
+  OpenGL library for painting operations.
+ */
+//! [4]
+void QAhiGLWindowSurface::beginPaint(const QRegion &region)
+{
+    QWSGLWindowSurface::beginPaint(region);
+
+    if (d_ptr->frameBufferObject)
+        glBindFramebufferOES(GL_FRAMEBUFFER_EXT, d_ptr->frameBufferObject);
+}
+//! [4]
+
+/*!
+  This function returns true if the window associated with
+  this window surface can still rendered using this window
+  surface class. Either the window's top-level widget must
+  be an \l {QGLWidget} {OpenGL widget}, or the window's
+  frame must be no bigger than 256 x 256.
+ */
+//! [5]
+bool QAhiGLWindowSurface::isValid() const
+{
+    if (!qobject_cast<QGLWidget*>(window())) {
+        const QRect r = window()->frameGeometry();
+        if (r.width() > 256 || r.height() > 256)
+            return false;
+    }
+    return true;
+}
+//! [5]
diff --git a/examples/qws/ahigl/qwindowsurface_ahigl_p.h b/examples/qws/ahigl/qwindowsurface_ahigl_p.h
new file mode 100644
index 0000000..40a82ed
--- /dev/null
+++ b/examples/qws/ahigl/qwindowsurface_ahigl_p.h
@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QWINDOWSURFACE_AHIGL_P_H
+#define QWINDOWSURFACE_AHIGL_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the QAhiGLWindowSurface class.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtOpenGL/private/qglwindowsurface_qws_p.h>
+#include <GLES/gl.h>
+#include <GLES/egl.h>
+
+QT_BEGIN_NAMESPACE
+class QAhiGLWindowSurfacePrivate;
+QT_END_NAMESPACE
+
+//! [0]
+class QAhiGLWindowSurface : public QWSGLWindowSurface
+{
+public:
+    QAhiGLWindowSurface(QWidget *widget, EGLDisplay eglDisplay,
+                        EGLSurface eglSurface, EGLContext eglContext);
+    QAhiGLWindowSurface(EGLDisplay eglDisplay, EGLSurface eglSurface,
+                        EGLContext eglContext);
+    ~QAhiGLWindowSurface();
+
+    QString key() const { return QLatin1String("ahigl"); }
+    void setGeometry(const QRect &rect);
+    QPaintDevice *paintDevice();
+    void beginPaint(const QRegion &region);
+    bool isValid() const;
+
+    QByteArray permanentState() const;
+    void setPermanentState(const QByteArray &);
+
+    QImage image() const { return QImage(); }
+
+    GLuint textureId() const;
+
+private:
+    QAhiGLWindowSurfacePrivate *d_ptr;
+};
+//! [0]
+
+#endif // QWINDOWSURFACE_AHIGL_P_H