Integrate the OpenVG graphics system into Qt 4.6

This change also moves the EGL support classes from QtOpenGL to QtGui
so they can be shared between OpenGL and OpenVG.

9 files changed, 1685 insertions, 0 deletions

diff --git a/src/gui/egl/egl.pri b/src/gui/egl/egl.pri
new file mode 100644
index 0000000..651507f
--- /dev/null
+++ b/src/gui/egl/egl.pri
@@ -0,0 +1,28 @@
+HEADERS += \
+    egl/qegl_p.h \
+    egl/qeglproperties_p.h
+
+SOURCES += \
+    egl/qegl.cpp \
+    egl/qeglproperties.cpp
+
+contains(QT_CONFIG, wince*): SOURCES += egl/qegl_wince.cpp
+
+unix {
+    embedded {
+        SOURCES += egl/qegl_qws.cpp
+    } else {
+        symbian {
+            SOURCES += egl/qegl_symbian.cpp
+        } else {
+            SOURCES += egl/qegl_x11.cpp
+        }
+    }
+}
+
+for(p, QMAKE_LIBDIR_EGL) {
+    exists($$p):LIBS += -L$$p
+}
+
+!isEmpty(QMAKE_INCDIR_EGL): INCLUDEPATH += $$QMAKE_INCDIR_EGL
+!isEmpty(QMAKE_LIBS_EGL): LIBS += $$QMAKE_LIBS_EGL
diff --git a/src/gui/egl/qegl.cpp b/src/gui/egl/qegl.cpp
new file mode 100644
index 0000000..89d9d1b
--- /dev/null
+++ b/src/gui/egl/qegl.cpp
@@ -0,0 +1,403 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qwidget.h>
+#include <QtCore/qdebug.h>
+#include "qegl_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QEglContext::QEglContext()
+    : apiType(QEgl::OpenGL)
+    , dpy(EGL_NO_DISPLAY)
+    , ctx(EGL_NO_CONTEXT)
+    , surf(EGL_NO_SURFACE)
+    , cfg(0)
+    , share(false)
+    , current(false)
+    , reserved(0)
+{
+}
+
+QEglContext::~QEglContext()
+{
+    destroy();
+}
+
+bool QEglContext::isValid() const
+{
+    return (ctx != EGL_NO_CONTEXT);
+}
+
+bool QEglContext::isSharing() const
+{
+    return share;
+}
+
+bool QEglContext::isCurrent() const
+{
+    return current;
+}
+
+// Open the EGL display associated with "device".
+bool QEglContext::openDisplay(QPaintDevice *device)
+{
+    if (dpy == EGL_NO_DISPLAY)
+        dpy = defaultDisplay(device);
+    return (dpy != EGL_NO_DISPLAY);
+}
+
+// Choose a configuration that matches "properties".
+bool QEglContext::chooseConfig
+        (const QEglProperties& properties, QEgl::PixelFormatMatch match)
+{
+    QEglProperties props(properties);
+    do {
+        // Get the number of matching configurations for this set of properties.
+        EGLint matching = 0;
+        if (!eglChooseConfig(dpy, props.properties(), 0, 256, &matching) || !matching)
+            continue;
+
+        // If we want the best pixel format, then return the first
+        // matching configuration.
+        if (match == QEgl::BestPixelFormat) {
+            eglChooseConfig(dpy, props.properties(), &cfg, 1, &matching);
+            if (matching < 1)
+                continue;
+            return true;
+        }
+
+        // Fetch all of the matching configurations and find the
+        // first that matches the pixel format we wanted.
+        EGLint size = matching;
+        EGLConfig *configs = new EGLConfig [size];
+        eglChooseConfig(dpy, props.properties(), configs, size, &matching);
+        for (EGLint index = 0; index < size; ++index) {
+            EGLint red, green, blue, alpha;
+            eglGetConfigAttrib(dpy, configs[index], EGL_RED_SIZE, &red);
+            eglGetConfigAttrib(dpy, configs[index], EGL_GREEN_SIZE, &green);
+            eglGetConfigAttrib(dpy, configs[index], EGL_BLUE_SIZE, &blue);
+            eglGetConfigAttrib(dpy, configs[index], EGL_ALPHA_SIZE, &alpha);
+            if (red == props.value(EGL_RED_SIZE) &&
+                    green == props.value(EGL_GREEN_SIZE) &&
+                    blue == props.value(EGL_BLUE_SIZE) &&
+                    (props.value(EGL_ALPHA_SIZE) == 0 ||
+                     alpha == props.value(EGL_ALPHA_SIZE))) {
+                cfg = configs[index];
+                delete [] configs;
+                return true;
+            }
+        }
+        delete [] configs;
+    } while (props.reduceConfiguration());
+
+#ifdef EGL_BIND_TO_TEXTURE_RGBA
+    // Don't report an error just yet if we failed to get a pbuffer
+    // configuration with texture rendering.  Only report failure if
+    // we cannot get any pbuffer configurations at all.
+    if (props.value(EGL_BIND_TO_TEXTURE_RGBA) == EGL_DONT_CARE &&
+        props.value(EGL_BIND_TO_TEXTURE_RGB) == EGL_DONT_CARE)
+#endif
+    {
+        qWarning() << "QEglContext::chooseConfig(): Could not find a suitable EGL configuration";
+        qWarning() << "Requested:" << props.toString();
+        qWarning() << "Available:";
+        dumpAllConfigs();
+    }
+    return false;
+}
+
+// Create the EGLContext.
+bool QEglContext::createContext(QEglContext *shareContext)
+{
+    // We need to select the correct API before calling eglCreateContext().
+#ifdef EGL_OPENGL_ES_API
+    if (apiType == QEgl::OpenGL)
+        eglBindAPI(EGL_OPENGL_ES_API);
+#endif
+#ifdef EGL_OPENVG_API
+    if (apiType == QEgl::OpenVG)
+        eglBindAPI(EGL_OPENVG_API);
+#endif
+
+    // Create a new context for the configuration.
+    QEglProperties contextProps;
+#if defined(QT_OPENGL_ES_2)
+    if (apiType == QEgl::OpenGL)
+        contextProps.setValue(EGL_CONTEXT_CLIENT_VERSION, 2);
+#endif
+    if (shareContext && shareContext->ctx == EGL_NO_CONTEXT)
+        shareContext = 0;
+    if (shareContext) {
+        ctx = eglCreateContext(dpy, cfg, shareContext->ctx, contextProps.properties());
+        if (ctx == EGL_NO_CONTEXT) {
+            qWarning() << "QEglContext::createContext(): Could not share context:" << errorString(eglGetError());
+            shareContext = 0;
+        }
+    }
+    if (ctx == EGL_NO_CONTEXT) {
+        ctx = eglCreateContext(dpy, cfg, 0, contextProps.properties());
+        if (ctx == EGL_NO_CONTEXT) {
+            qWarning() << "QEglContext::createContext(): Unable to create EGL context:" << errorString(eglGetError());
+            return false;
+        }
+    }
+    share = (shareContext != 0);
+    return true;
+}
+
+// Recreate the surface for a paint device because the native id has changed.
+bool QEglContext::recreateSurface(QPaintDevice *device)
+{
+    // Bail out if the surface has not been created for the first time yet.
+    if (surf == EGL_NO_SURFACE)
+        return true;
+
+    // Destroy the old surface.
+    eglDestroySurface(dpy, surf);
+    surf = EGL_NO_SURFACE;
+
+    // Create a new one.
+    return createSurface(device);
+}
+
+// Destroy the EGL surface object.
+void QEglContext::destroySurface()
+{
+    if (surf != EGL_NO_SURFACE) {
+        eglDestroySurface(dpy, surf);
+        surf = EGL_NO_SURFACE;
+    }
+}
+
+// Destroy the context.  Note: this does not destroy the surface.
+void QEglContext::destroy()
+{
+    if (ctx != EGL_NO_CONTEXT)
+        eglDestroyContext(dpy, ctx);
+    dpy = EGL_NO_DISPLAY;
+    ctx = EGL_NO_CONTEXT;
+    surf = EGL_NO_SURFACE;
+    cfg = 0;
+    share = false;
+}
+
+bool QEglContext::makeCurrent()
+{
+    if (ctx == EGL_NO_CONTEXT) {
+        qWarning() << "QEglContext::makeCurrent(): Cannot make invalid context current";
+        return false;
+    }
+
+    current = true;
+
+    bool ok = eglMakeCurrent(dpy, surf, surf, ctx);
+    if (!ok)
+        qWarning() << "QEglContext::makeCurrent():" << errorString(eglGetError());
+    return ok;
+}
+
+bool QEglContext::doneCurrent()
+{
+    // If the context is invalid, we assume that an error was reported
+    // when makeCurrent() was called.
+    if (ctx == EGL_NO_CONTEXT)
+        return false;
+
+    current = false;
+
+    // We need to select the correct API before calling eglMakeCurrent()
+    // with EGL_NO_CONTEXT because threads can have both OpenGL and OpenVG
+    // contexts active at the same time.
+#ifdef EGL_OPENGL_ES_API
+    if (apiType == QEgl::OpenGL)
+        eglBindAPI(EGL_OPENGL_ES_API);
+#endif
+#ifdef EGL_OPENVG_API
+    if (apiType == QEgl::OpenVG)
+        eglBindAPI(EGL_OPENVG_API);
+#endif
+
+    bool ok = eglMakeCurrent(dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    if (!ok)
+        qWarning() << "QEglContext::doneCurrent():" << errorString(eglGetError());
+    return ok;
+}
+
+bool QEglContext::swapBuffers()
+{
+    if(ctx == EGL_NO_CONTEXT)
+        return false;
+
+    bool ok = eglSwapBuffers(dpy, surf);
+    if (!ok)
+        qWarning() << "QEglContext::swapBuffers():" << errorString(eglGetError());
+    return ok;
+}
+
+// Wait for native rendering operations to complete before starting
+// to use OpenGL/OpenVG operations.
+void QEglContext::waitNative()
+{
+#ifdef EGL_CORE_NATIVE_ENGINE
+    eglWaitNative(EGL_CORE_NATIVE_ENGINE);
+#endif
+}
+
+// Wait for client OpenGL/OpenVG operations to complete before
+// using native rendering operations.
+void QEglContext::waitClient()
+{
+#ifdef EGL_OPENGL_ES_API
+    if (apiType == QEgl::OpenGL) {
+        eglBindAPI(EGL_OPENGL_ES_API);
+        eglWaitClient();
+    }
+#else
+    if (apiType == QEgl::OpenGL)
+        eglWaitGL();
+#endif
+#ifdef EGL_OPENVG_API
+    if (apiType == QEgl::OpenVG) {
+        eglBindAPI(EGL_OPENVG_API);
+        eglWaitClient();
+    }
+#endif
+}
+
+// Query the actual size of the EGL surface.
+QSize QEglContext::surfaceSize() const
+{
+    int w, h;
+    eglQuerySurface(dpy, surf, EGL_WIDTH, &w);
+    eglQuerySurface(dpy, surf, EGL_HEIGHT, &h);
+    return QSize(w, h);
+}
+
+// Query the value of a configuration attribute.
+bool QEglContext::configAttrib(int name, EGLint *value) const
+{
+    return eglGetConfigAttrib(dpy, cfg, name, value);
+}
+
+// Retrieve all of the properties on "cfg".  If zero, return
+// the context's configuration.
+QEglProperties QEglContext::configProperties(EGLConfig cfg) const
+{
+    if (!cfg)
+        cfg = config();
+    QEglProperties props;
+    for (int name = 0x3020; name <= 0x304F; ++name) {
+        EGLint value;
+        if (name != EGL_NONE && eglGetConfigAttrib(dpy, cfg, name, &value))
+            props.setValue(name, value);
+    }
+    eglGetError();  // Clear the error state.
+    return props;
+}
+
+// Initialize and return the default display.
+EGLDisplay QEglContext::defaultDisplay(QPaintDevice *device)
+{
+    static EGLDisplay dpy = EGL_NO_DISPLAY;
+    if (dpy == EGL_NO_DISPLAY) {
+        dpy = getDisplay(device);
+        if (dpy == EGL_NO_DISPLAY) {
+            qWarning() << "QEglContext::defaultDisplay(): Cannot open EGL display";
+            return EGL_NO_DISPLAY;
+        }
+        if (!eglInitialize(dpy, NULL, NULL)) {
+            qWarning() << "QEglContext::defaultDisplay(): Cannot initialize EGL display:" << errorString(eglGetError());
+            return EGL_NO_DISPLAY;
+        }
+#ifdef EGL_OPENGL_ES_API
+        eglBindAPI(EGL_OPENGL_ES_API);
+#endif
+    }
+    return dpy;
+}
+
+// Return the error string associated with a specific code.
+QString QEglContext::errorString(EGLint code)
+{
+    static const char * const errors[] = {
+        "Success (0x3000)",                 // No tr
+        "Not initialized (0x3001)",         // No tr
+        "Bad access (0x3002)",              // No tr
+        "Bad alloc (0x3003)",               // No tr
+        "Bad attribute (0x3004)",           // No tr
+        "Bad config (0x3005)",              // No tr
+        "Bad context (0x3006)",             // No tr
+        "Bad current surface (0x3007)",     // No tr
+        "Bad display (0x3008)",             // No tr
+        "Bad match (0x3009)",               // No tr
+        "Bad native pixmap (0x300A)",       // No tr
+        "Bad native window (0x300B)",       // No tr
+        "Bad parameter (0x300C)",           // No tr
+        "Bad surface (0x300D)",             // No tr
+        "Context lost (0x300E)"             // No tr
+    };
+    if (code >= 0x3000 && code <= 0x300E) {
+        return QString::fromLatin1(errors[code - 0x3000]);
+    } else {
+        return QLatin1String("0x") + QString::number(int(code), 16);
+    }
+}
+
+// Dump all of the EGL configurations supported by the system.
+void QEglContext::dumpAllConfigs()
+{
+    QEglProperties props;
+    EGLint count = 0;
+    if (!eglGetConfigs(dpy, 0, 0, &count) || count < 1)
+        return;
+    EGLConfig *configs = new EGLConfig [count];
+    eglGetConfigs(dpy, configs, count, &count);
+    for (EGLint index = 0; index < count; ++index) {
+        props = configProperties(configs[index]);
+        qWarning() << props.toString();
+    }
+    delete [] configs;
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/egl/qegl_p.h b/src/gui/egl/qegl_p.h
new file mode 100644
index 0000000..89949e2
--- /dev/null
+++ b/src/gui/egl/qegl_p.h
@@ -0,0 +1,140 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QEGL_P_H
+#define QEGL_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 QGLWidget and QVGWidget classes.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qsize.h>
+#include <QtGui/qimage.h>
+
+#include "qeglproperties_p.h"
+
+QT_BEGIN_INCLUDE_NAMESPACE
+
+#if !defined(EGL_VERSION_1_3) && !defined(QEGL_NATIVE_TYPES_DEFINED)
+#undef EGLNativeWindowType
+#undef EGLNativePixmapType
+#undef EGLNativeDisplayType
+typedef NativeWindowType EGLNativeWindowType;
+typedef NativePixmapType EGLNativePixmapType;
+typedef NativeDisplayType EGLNativeDisplayType;
+#define QEGL_NATIVE_TYPES_DEFINED 1
+#endif
+QT_END_INCLUDE_NAMESPACE
+
+QT_BEGIN_NAMESPACE
+
+class Q_GUI_EXPORT QEglContext
+{
+public:
+    QEglContext();
+    ~QEglContext();
+
+    bool isValid() const;
+    bool isSharing() const;
+    bool isCurrent() const;
+
+    QEgl::API api() const { return apiType; }
+    void setApi(QEgl::API api) { apiType = api; }
+
+    bool openDisplay(QPaintDevice *device);
+    bool chooseConfig(const QEglProperties& properties, QEgl::PixelFormatMatch match = QEgl::ExactPixelFormat);
+    bool createContext(QEglContext *shareContext = 0);
+    bool createSurface(QPaintDevice *device, const QEglProperties *properties = 0);
+    bool recreateSurface(QPaintDevice *device);
+    void destroySurface();
+
+    void destroy();
+
+    bool makeCurrent();
+    bool doneCurrent();
+    bool swapBuffers();
+
+    void waitNative();
+    void waitClient();
+
+    QSize surfaceSize() const;
+
+    bool configAttrib(int name, EGLint *value) const;
+
+    static void clearError() { eglGetError(); }
+    static EGLint error() { return eglGetError(); }
+    static QString errorString(EGLint code);
+
+    EGLDisplay display() const { return dpy; }
+    EGLContext context() const { return ctx; }
+    EGLSurface surface() const { return surf; }
+    void setSurface(EGLSurface surface) { surf = surface; }
+    EGLConfig config() const { return cfg; }
+
+    QEglProperties configProperties(EGLConfig cfg = 0) const;
+
+    static EGLDisplay defaultDisplay(QPaintDevice *device);
+
+    void dumpAllConfigs();
+
+private:
+    QEgl::API apiType;
+    EGLDisplay dpy;
+    EGLContext ctx;
+    EGLSurface surf;
+    EGLConfig cfg;
+    bool share;
+    bool current;
+    void *reserved;     // For extension data in future versions.
+
+    static EGLDisplay getDisplay(QPaintDevice *device);
+};
+
+QT_END_NAMESPACE
+
+#endif // QEGL_P_H
diff --git a/src/gui/egl/qegl_qws.cpp b/src/gui/egl/qegl_qws.cpp
new file mode 100644
index 0000000..69eaf1b
--- /dev/null
+++ b/src/gui/egl/qegl_qws.cpp
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qwidget.h>
+#include "qegl_p.h"
+
+#if !defined(QT_NO_EGL)
+
+#include <qscreen_qws.h>
+#include <qscreenproxy_qws.h>
+#include <qapplication.h>
+#include <qdesktopwidget.h>
+
+QT_BEGIN_NAMESPACE
+
+// Create the surface for a QPixmap, QImage, or QWidget.
+// We don't have QGLScreen to create EGL surfaces for us,
+// so surface creation needs to be done in QtOpenGL or
+// QtOpenVG for Qt/Embedded.
+bool QEglContext::createSurface(QPaintDevice *device, const QEglProperties *properties)
+{
+    Q_UNUSED(device);
+    Q_UNUSED(properties);
+    return false;
+}
+
+EGLDisplay QEglContext::getDisplay(QPaintDevice *device)
+{
+    Q_UNUSED(device);
+    return eglGetDisplay(EGLNativeDisplayType(EGL_DEFAULT_DISPLAY));
+}
+
+static QScreen *screenForDevice(QPaintDevice *device)
+{
+    QScreen *screen = qt_screen;
+    if (!screen)
+        return 0;
+    if (screen->classId() == QScreen::MultiClass) {
+        int screenNumber;
+        if (device && device->devType() == QInternal::Widget)
+            screenNumber = qApp->desktop()->screenNumber(static_cast<QWidget *>(device));
+        else
+            screenNumber = 0;
+        screen = screen->subScreens()[screenNumber];
+    }
+    while (screen->classId() == QScreen::ProxyClass) {
+        screen = static_cast<QProxyScreen *>(screen)->screen();
+    }
+    return screen;
+}
+
+// Set pixel format and other properties based on a paint device.
+void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)
+{
+    if (!dev)
+        return;
+
+    // Find the QGLScreen for this paint device.
+    QScreen *screen = screenForDevice(dev);
+    if (!screen)
+        return;
+    int devType = dev->devType();
+    if (devType == QInternal::Image)
+        setPixelFormat(static_cast<QImage *>(dev)->format());
+    else
+        setPixelFormat(screen->pixelFormat());
+}
+
+QT_END_NAMESPACE
+
+#endif // !QT_NO_EGL
diff --git a/src/gui/egl/qegl_symbian.cpp b/src/gui/egl/qegl_symbian.cpp
new file mode 100644
index 0000000..16a72a1
--- /dev/null
+++ b/src/gui/egl/qegl_symbian.cpp
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qwidget.h>
+#include "qegl_p.h"
+
+#include <coecntrl.h>
+
+QT_BEGIN_NAMESPACE
+
+bool QEglContext::createSurface(QPaintDevice *device, const QEglProperties *properties)
+{
+    // Create the native drawable for the paint device.
+    int devType = device->devType();
+    EGLNativePixmapType pixmapDrawable = 0;
+    EGLNativeWindowType windowDrawable = 0;
+    bool ok;
+    if (devType == QInternal::Pixmap) {
+        pixmapDrawable = 0;
+        ok = (pixmapDrawable != 0);
+    } else if (devType == QInternal::Widget) {
+        QWidget *w = static_cast<QWidget *>(device);
+        windowDrawable = (EGLNativeWindowType)(w->winId()->DrawableWindow());
+        ok = (windowDrawable != 0);
+    } else {
+        ok = false;
+    }
+    if (!ok) {
+        qWarning("QEglContext::createSurface(): Cannot create the native EGL drawable");
+        return false;
+    }
+
+    // Create the EGL surface to draw into, based on the native drawable.
+    const int *props;
+    if (properties)
+        props = properties->properties();
+    else
+        props = 0;
+    if (devType == QInternal::Widget)
+        surf = eglCreateWindowSurface(dpy, cfg, windowDrawable, 0);
+    else
+        surf = eglCreatePixmapSurface(dpy, cfg, pixmapDrawable, 0);
+    if (surf == EGL_NO_SURFACE) {
+        qWarning("QEglContext::createSurface(): Unable to create EGL surface, error = 0x%x", eglGetError());
+        return false;
+    }
+    return true;
+}
+
+EGLDisplay QEglContext::getDisplay(QPaintDevice *device)
+{
+    EGLDisplay dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (dpy == EGL_NO_DISPLAY)
+        qWarning("QEglContext::defaultDisplay(): Falling back to EGL_DEFAULT_DISPLAY");
+    return dpy;
+}
+
+// Set pixel format and other properties based on a paint device.
+void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)
+{
+    int devType = dev->devType();
+    if (devType == QInternal::Image)
+        setPixelFormat(static_cast<QImage *>(dev)->format());
+    else
+        setPixelFormat(QImage::Format_RGB32);
+}
+
+
+QT_END_NAMESPACE
diff --git a/src/gui/egl/qegl_wince.cpp b/src/gui/egl/qegl_wince.cpp
new file mode 100644
index 0000000..7bcbcf8
--- /dev/null
+++ b/src/gui/egl/qegl_wince.cpp
@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qwidget.h>
+#include "qegl_p.h"
+
+#include <windows.h>
+
+
+QT_BEGIN_NAMESPACE
+
+bool QEglContext::createSurface(QPaintDevice *device, const QEglProperties *properties)
+{
+    // Create the native drawable for the paint device.
+    int devType = device->devType();
+    EGLNativePixmapType pixmapDrawable = 0;
+    EGLNativeWindowType windowDrawable = 0;
+    bool ok;
+    if (devType == QInternal::Pixmap) {
+        pixmapDrawable = 0;
+        ok = (pixmapDrawable != 0);
+    } else if (devType == QInternal::Widget) {
+        windowDrawable = (EGLNativeWindowType)(static_cast<QWidget *>(device))->winId();
+        ok = (windowDrawable != 0);
+    } else {
+        ok = false;
+    }
+    if (!ok) {
+        qWarning("QEglContext::createSurface(): Cannot create the native EGL drawable");
+        return false;
+    }
+
+    // Create the EGL surface to draw into, based on the native drawable.
+    const int *props;
+    if (properties)
+        props = properties->properties();
+    else
+        props = 0;
+    if (devType == QInternal::Widget)
+        surf = eglCreateWindowSurface(dpy, cfg, windowDrawable, props);
+    else
+        surf = eglCreatePixmapSurface(dpy, cfg, pixmapDrawable, props);
+    if (surf == EGL_NO_SURFACE) {
+        qWarning("QEglContext::createSurface(): Unable to create EGL surface, error = 0x%x", eglGetError());
+        return false;
+    }
+    return true;
+}
+
+EGLDisplay QEglContext::getDisplay(QPaintDevice *device)
+{
+    EGLDisplay dpy = 0;
+    HWND win = (static_cast<QWidget*>(device))->winId();
+    HDC myDc = GetDC(win);
+    if (!myDc) {
+        qWarning("QEglContext::defaultDisplay(): WinCE display is not open");
+    }
+    dpy = eglGetDisplay(EGLNativeDisplayType(myDc));
+    if (dpy == EGL_NO_DISPLAY) {
+        qWarning("QEglContext::defaultDisplay(): Falling back to EGL_DEFAULT_DISPLAY");
+        dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    }
+    return dpy;
+}
+
+// Set pixel format and other properties based on a paint device.
+void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)
+{
+    int devType = dev->devType();
+    if (devType == QInternal::Image)
+        setPixelFormat(static_cast<QImage *>(dev)->format());
+    else
+        setPixelFormat(QImage::Format_RGB16); // XXX
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/egl/qegl_x11.cpp b/src/gui/egl/qegl_x11.cpp
new file mode 100644
index 0000000..be89efe
--- /dev/null
+++ b/src/gui/egl/qegl_x11.cpp
@@ -0,0 +1,144 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui/qpaintdevice.h>
+#include <QtGui/qpixmap.h>
+#include <QtGui/qwidget.h>
+#include <QtCore/qdebug.h>
+#include "qegl_p.h"
+
+#include <QtGui/qx11info_x11.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+QT_BEGIN_NAMESPACE
+
+bool QEglContext::createSurface(QPaintDevice *device, const QEglProperties *properties)
+{
+    // Create the native drawable for the paint device.
+    int devType = device->devType();
+    EGLNativePixmapType pixmapDrawable = 0;
+    EGLNativeWindowType windowDrawable = 0;
+    bool ok;
+    if (devType == QInternal::Pixmap) {
+        pixmapDrawable = (EGLNativePixmapType)(static_cast<QPixmap *>(device))->handle();
+        ok = (pixmapDrawable != 0);
+    } else if (devType == QInternal::Widget) {
+        windowDrawable = (EGLNativeWindowType)(static_cast<QWidget *>(device))->winId();
+        ok = (windowDrawable != 0);
+    } else {
+        ok = false;
+    }
+    if (!ok) {
+        qWarning("QEglContext::createSurface(): Cannot create the native EGL drawable");
+        return false;
+    }
+
+    // Create the EGL surface to draw into, based on the native drawable.
+    const int *props;
+    if (properties)
+        props = properties->properties();
+    else
+        props = 0;
+    if (devType == QInternal::Widget)
+        surf = eglCreateWindowSurface(dpy, cfg, windowDrawable, props);
+    else
+        surf = eglCreatePixmapSurface(dpy, cfg, pixmapDrawable, props);
+    if (surf == EGL_NO_SURFACE) {
+        qWarning() << "QEglContext::createSurface(): Unable to create EGL surface:"
+                   << errorString(eglGetError());
+        return false;
+    }
+    return true;
+}
+
+EGLDisplay QEglContext::getDisplay(QPaintDevice *device)
+{
+    Q_UNUSED(device);
+    Display *xdpy = QX11Info::display();
+    if (!xdpy) {
+        qWarning("QEglContext::getDisplay(): X11 display is not open");
+        return EGL_NO_DISPLAY;
+    }
+    return eglGetDisplay(EGLNativeDisplayType(xdpy));
+}
+
+static int countBits(unsigned long mask)
+{
+    int count = 0;
+    while (mask != 0) {
+        if (mask & 1)
+            ++count;
+        mask >>= 1;
+    }
+    return count;
+}
+
+// Set the pixel format parameters from the visual in "xinfo".
+void QEglProperties::setVisualFormat(const QX11Info *xinfo)
+{
+    if (!xinfo)
+        return;
+    Visual *visual = (Visual*)xinfo->visual();
+    if (!visual)
+        return;
+    if (visual->c_class != TrueColor && visual->c_class != DirectColor)
+        return;
+    setValue(EGL_RED_SIZE, countBits(visual->red_mask));
+    setValue(EGL_GREEN_SIZE, countBits(visual->green_mask));
+    setValue(EGL_BLUE_SIZE, countBits(visual->blue_mask));
+    setValue(EGL_ALPHA_SIZE, 0);    // XXX
+}
+
+extern const QX11Info *qt_x11Info(const QPaintDevice *pd);
+
+// Set pixel format and other properties based on a paint device.
+void QEglProperties::setPaintDeviceFormat(QPaintDevice *dev)
+{
+    if (!dev)
+        return;
+    if (dev->devType() == QInternal::Image)
+        setPixelFormat(static_cast<QImage *>(dev)->format());
+    else
+        setVisualFormat(qt_x11Info(dev));
+}
+
+QT_END_NAMESPACE
diff --git a/src/gui/egl/qeglproperties.cpp b/src/gui/egl/qeglproperties.cpp
new file mode 100644
index 0000000..e0ae8a6
--- /dev/null
+++ b/src/gui/egl/qeglproperties.cpp
@@ -0,0 +1,496 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qeglproperties_p.h"
+
+QT_BEGIN_NAMESPACE
+
+#include <QtCore/qdebug.h>
+#include <QtCore/qstringlist.h>
+
+// Initialize a property block.
+QEglProperties::QEglProperties()
+{
+    props.append(EGL_NONE);
+}
+
+// Fetch the current value associated with a property.
+int QEglProperties::value(int name) const
+{
+    for (int index = 0; index < (props.size() - 1); index += 2) {
+        if (props[index] == name)
+            return props[index + 1];
+    }
+
+    // If the attribute has not been explicitly set, return the EGL default
+    // The following defaults were taken from the EGL 1.4 spec:
+    switch(name) {
+    case EGL_BUFFER_SIZE: return 0;
+    case EGL_RED_SIZE: return 0;
+    case EGL_GREEN_SIZE: return 0;
+    case EGL_BLUE_SIZE: return 0;
+    case EGL_ALPHA_SIZE: return 0;
+#if defined(EGL_LUMINANCE_SIZE)
+    case EGL_LUMINANCE_SIZE: return 0;
+#endif
+#if defined(EGL_ALPHA_MASK_SIZE)
+    case EGL_ALPHA_MASK_SIZE: return 0;
+#endif
+    case EGL_BIND_TO_TEXTURE_RGB: return EGL_DONT_CARE;
+    case EGL_BIND_TO_TEXTURE_RGBA: return EGL_DONT_CARE;
+#if defined(EGL_COLOR_BUFFER_TYPE)
+    case EGL_COLOR_BUFFER_TYPE: return EGL_RGB_BUFFER;
+#endif
+    case EGL_CONFIG_CAVEAT: return EGL_DONT_CARE;
+    case EGL_CONFIG_ID: return EGL_DONT_CARE;
+    case EGL_DEPTH_SIZE: return 0;
+    case EGL_LEVEL: return 0;
+    case EGL_NATIVE_RENDERABLE: return EGL_DONT_CARE;
+    case EGL_NATIVE_VISUAL_TYPE: return EGL_DONT_CARE;
+    case EGL_MAX_SWAP_INTERVAL: return EGL_DONT_CARE;
+    case EGL_MIN_SWAP_INTERVAL: return EGL_DONT_CARE;
+#if defined(EGL_RENDERABLE_TYPE)
+    case EGL_RENDERABLE_TYPE: return EGL_OPENGL_ES_BIT;
+#endif
+    case EGL_SAMPLE_BUFFERS: return 0;
+    case EGL_SAMPLES: return 0;
+    case EGL_STENCIL_SIZE: return 0;
+    case EGL_SURFACE_TYPE: return EGL_WINDOW_BIT;
+    case EGL_TRANSPARENT_TYPE: return EGL_NONE;
+    case EGL_TRANSPARENT_RED_VALUE: return EGL_DONT_CARE;
+    case EGL_TRANSPARENT_GREEN_VALUE: return EGL_DONT_CARE;
+    case EGL_TRANSPARENT_BLUE_VALUE: return EGL_DONT_CARE;
+
+#if defined(EGL_VERSION_1_3)
+    case EGL_CONFORMANT: return 0;
+    case EGL_MATCH_NATIVE_PIXMAP: return EGL_NONE;
+#endif
+
+    case EGL_MAX_PBUFFER_HEIGHT:
+    case EGL_MAX_PBUFFER_WIDTH:
+    case EGL_MAX_PBUFFER_PIXELS:
+    case EGL_NATIVE_VISUAL_ID:
+    case EGL_NONE:
+        // Attribute does not affect config selection.
+        return EGL_DONT_CARE;
+    default:
+        // Attribute is unknown in EGL <= 1.4.
+        return EGL_DONT_CARE;
+    }
+}
+
+// Set the value associated with a property, replacing an existing
+// value if there is one.
+void QEglProperties::setValue(int name, int value)
+{
+    for (int index = 0; index < (props.size() - 1); index += 2) {
+        if (props[index] == name) {
+            props[index + 1] = value;
+            return;
+        }
+    }
+    props[props.size() - 1] = name;
+    props.append(value);
+    props.append(EGL_NONE);
+}
+
+// Remove a property value.  Returns false if the property is not present.
+bool QEglProperties::removeValue(int name)
+{
+    for (int index = 0; index < (props.size() - 1); index += 2) {
+        if (props[index] == name) {
+            while ((index + 2) < props.size()) {
+                props[index] = props[index + 2];
+                ++index;
+            }
+            props.resize(props.size() - 2);
+            return true;
+        }
+    }
+    return false;
+}
+
+// Sets the red, green, blue, and alpha sizes based on a pixel format.
+// Normally used to match a configuration request to the screen format.
+void QEglProperties::setPixelFormat(QImage::Format pixelFormat)
+{
+    int red, green, blue, alpha;
+    switch (pixelFormat) {
+        case QImage::Format_RGB32:
+        case QImage::Format_RGB888:
+            red = green = blue = 8; alpha = 0; break;
+        case QImage::Format_ARGB32:
+        case QImage::Format_ARGB32_Premultiplied:
+            red = green = blue = alpha = 8; break;
+        case QImage::Format_RGB16:
+            red = 5; green = 6; blue = 5; alpha = 0; break;
+        case QImage::Format_ARGB8565_Premultiplied:
+            red = 5; green = 6; blue = 5; alpha = 8; break;
+        case QImage::Format_RGB666:
+            red = green = blue = 6; alpha = 0; break;
+        case QImage::Format_ARGB6666_Premultiplied:
+            red = green = blue = alpha = 6; break;
+        case QImage::Format_RGB555:
+            red = green = blue = 5; alpha = 0; break;
+        case QImage::Format_ARGB8555_Premultiplied:
+            red = green = blue = 5; alpha = 8; break;
+        case QImage::Format_RGB444:
+            red = green = blue = 4; alpha = 0; break;
+        case QImage::Format_ARGB4444_Premultiplied:
+            red = green = blue = alpha = 4; break;
+        default:
+            qWarning() << "QEglProperties::setPixelFormat(): Unsupported pixel format";
+            red = green = blue = alpha = 1; break;
+    }
+    setValue(EGL_RED_SIZE, red);
+    setValue(EGL_GREEN_SIZE, green);
+    setValue(EGL_BLUE_SIZE, blue);
+    setValue(EGL_ALPHA_SIZE, alpha);
+}
+
+void QEglProperties::setRenderableType(QEgl::API api)
+{
+#if defined(EGL_RENDERABLE_TYPE)
+#if defined(QT_OPENGL_ES_2)
+    if (api == QEgl::OpenGL)
+        setValue(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT);
+#elif defined(QT_OPENGL_ES)
+    if (api == QEgl::OpenGL)
+        setValue(EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT);
+#endif
+#if defined(EGL_OPENVG_BIT)
+    if (api == QEgl::OpenVG)
+        setValue(EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT);
+#endif
+#else
+    Q_UNUSED(api);
+#endif
+}
+
+// Reduce the complexity of a configuration request to ask for less
+// because the previous request did not result in success.  Returns
+// true if the complexity was reduced, or false if no further
+// reductions in complexity are possible.
+bool QEglProperties::reduceConfiguration()
+{
+    if (removeValue(EGL_SAMPLE_BUFFERS)) {
+        removeValue(EGL_SAMPLES);
+        return true;
+    }
+    if (removeValue(EGL_ALPHA_SIZE))
+        return true;
+    if (removeValue(EGL_STENCIL_SIZE))
+        return true;
+    if (removeValue(EGL_DEPTH_SIZE))
+        return true;
+    return false;
+}
+
+static void addTag(QString& str, const QString& tag)
+{
+    int lastnl = str.lastIndexOf(QLatin1String("\n"));
+    if (lastnl == -1)
+        lastnl = 0;
+    if ((str.length() - lastnl) >= 50)
+        str += QLatin1String("\n   ");
+    str += tag;
+}
+
+// Convert a property list to a string suitable for debug output.
+QString QEglProperties::toString() const
+{
+    QString str;
+    int val;
+
+    val = value(EGL_CONFIG_ID);
+    if (val != EGL_DONT_CARE) {
+        str += QLatin1String("id=");
+        str += QString::number(val);
+        str += QLatin1Char(' ');
+    }
+
+#ifdef EGL_RENDERABLE_TYPE
+    val = value(EGL_RENDERABLE_TYPE);
+    if (val != EGL_DONT_CARE) {
+        str += QLatin1String("type=");
+        QStringList types;
+        if ((val & EGL_OPENGL_ES_BIT) != 0)
+            types += QLatin1String("es1");
+#ifdef EGL_OPENGL_ES2_BIT
+        if ((val & EGL_OPENGL_ES2_BIT) != 0)
+            types += QLatin1String("es2");
+#endif
+        if ((val & EGL_OPENVG_BIT) != 0)
+            types += QLatin1String("vg");
+        if ((val & ~7) != 0)
+            types += QString::number(val);
+        str += types.join(QLatin1String(","));
+    } else {
+        str += QLatin1String("type=any");
+    }
+#else
+    str += QLatin1String("type=es1");
+#endif
+
+    int red = value(EGL_RED_SIZE);
+    int green = value(EGL_GREEN_SIZE);
+    int blue = value(EGL_BLUE_SIZE);
+    int alpha = value(EGL_ALPHA_SIZE);
+    int bufferSize = value(EGL_BUFFER_SIZE);
+    if (bufferSize == (red + green + blue + alpha))
+        bufferSize = EGL_DONT_CARE;
+    str += QLatin1String(" rgba=");
+    str += QString::number(red);
+    str += QLatin1Char(',');
+    str += QString::number(green);
+    str += QLatin1Char(',');
+    str += QString::number(blue);
+    str += QLatin1Char(',');
+    str += QString::number(alpha);
+    if (bufferSize != EGL_DONT_CARE) {
+        // Only report buffer size if different than r+g+b+a.
+        str += QLatin1String(" buffer-size=");
+        str += QString::number(bufferSize);
+    }
+
+#ifdef EGL_COLOR_BUFFER_TYPE
+    val = value(EGL_COLOR_BUFFER_TYPE);
+    if (val == EGL_LUMINANCE_BUFFER) {
+        addTag(str, QLatin1String(" color-buffer-type=luminance"));
+    } else if (val != EGL_DONT_CARE && val != EGL_RGB_BUFFER) {
+        addTag(str, QLatin1String(" color-buffer-type="));
+        str += QString::number(val, 16);
+    }
+#endif
+
+    val = value(EGL_DEPTH_SIZE);
+    if (val != 0) {
+        addTag(str, QLatin1String(" depth="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_STENCIL_SIZE);
+    if (val != 0) {
+        addTag(str, QLatin1String(" stencil="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_SURFACE_TYPE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" surface-type="));
+        QStringList types;
+        if ((val & EGL_WINDOW_BIT) != 0)
+            types += QLatin1String("window");
+        if ((val & EGL_PIXMAP_BIT) != 0)
+            types += QLatin1String("pixmap");
+        if ((val & EGL_PBUFFER_BIT) != 0)
+            types += QLatin1String("pbuffer");
+#ifdef EGL_VG_COLORSPACE_LINEAR_BIT
+        if ((val & EGL_VG_COLORSPACE_LINEAR_BIT) != 0)
+            types += QLatin1String("vg-colorspace-linear");
+#endif
+#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
+        if ((val & EGL_VG_ALPHA_FORMAT_PRE_BIT) != 0)
+            types += QLatin1String("vg-alpha-format-pre");
+#endif
+        if ((val & ~(EGL_WINDOW_BIT | EGL_PIXMAP_BIT | EGL_PBUFFER_BIT
+#ifdef EGL_VG_COLORSPACE_LINEAR_BIT
+                     | EGL_VG_COLORSPACE_LINEAR_BIT
+#endif
+#ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
+                     | EGL_VG_ALPHA_FORMAT_PRE_BIT
+#endif
+                     )) != 0) {
+            types += QString::number(val);
+        }
+        str += types.join(QLatin1String(","));
+    }
+
+    val = value(EGL_CONFIG_CAVEAT);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" caveat="));
+        if (val == EGL_NONE)
+            str += QLatin1String("none");
+        else if (val == EGL_SLOW_CONFIG)
+            str += QLatin1String("slow");
+        else if (val == EGL_NON_CONFORMANT_CONFIG)
+            str += QLatin1String("non-conformant");
+        else
+            str += QString::number(val, 16);
+    }
+
+    val = value(EGL_LEVEL);
+    if (val != 0) {
+        addTag(str, QLatin1String(" level="));
+        str += QString::number(val);
+    }
+
+    int width, height, pixels;
+    width = value(EGL_MAX_PBUFFER_WIDTH);
+    height = value(EGL_MAX_PBUFFER_HEIGHT);
+    pixels = value(EGL_MAX_PBUFFER_PIXELS);
+    if (height != EGL_DONT_CARE || width != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" max-pbuffer-size="));
+        str += QString::number(width);
+        str += QLatin1Char('x');
+        str += QString::number(height);
+        if (pixels != (width * height)) {
+            addTag(str, QLatin1String(" max-pbuffer-pixels="));
+            str += QString::number(pixels);
+        }
+    }
+
+    val = value(EGL_NATIVE_RENDERABLE);
+    if (val != EGL_DONT_CARE) {
+        if (val)
+            addTag(str, QLatin1String(" native-renderable=true"));
+        else
+            addTag(str, QLatin1String(" native-renderable=false"));
+    }
+
+    val = value(EGL_NATIVE_VISUAL_ID);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" visual-id="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_NATIVE_VISUAL_TYPE);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" visual-type="));
+        str += QString::number(val);
+    }
+
+#ifdef EGL_PRESERVED_RESOURCES
+    val = value(EGL_PRESERVED_RESOURCES);
+    if (val != EGL_DONT_CARE) {
+        if (val)
+            addTag(str, QLatin1String(" preserved-resources=true"));
+        else
+            addTag(str, QLatin1String(" preserved-resources=false"));
+    }
+#endif
+
+    val = value(EGL_SAMPLES);
+    if (val != 0) {
+        addTag(str, QLatin1String(" samples="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_SAMPLE_BUFFERS);
+    if (val != 0) {
+        addTag(str, QLatin1String(" sample-buffers="));
+        str += QString::number(val);
+    }
+
+    val = value(EGL_TRANSPARENT_TYPE);
+    if (val == EGL_TRANSPARENT_RGB) {
+        addTag(str, QLatin1String(" transparent-rgb="));
+        str += QString::number(value(EGL_TRANSPARENT_RED_VALUE));
+        str += QLatin1Char(',');
+        str += QString::number(value(EGL_TRANSPARENT_GREEN_VALUE));
+        str += QLatin1Char(',');
+        str += QString::number(value(EGL_TRANSPARENT_BLUE_VALUE));
+    }
+
+#if defined(EGL_BIND_TO_TEXTURE_RGB) && defined(EGL_BIND_TO_TEXTURE_RGBA)
+    val = value(EGL_BIND_TO_TEXTURE_RGB);
+    int val2 = value(EGL_BIND_TO_TEXTURE_RGBA);
+    if (val != EGL_DONT_CARE || val2 != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" bind-texture="));
+        if (val == EGL_TRUE)
+            str += QLatin1String("rgb");
+        else
+            str += QLatin1String("no-rgb");
+        if (val2 == EGL_TRUE)
+            str += QLatin1String(",rgba");
+        else
+            str += QLatin1String(",no-rgba");
+    }
+#endif
+
+#ifdef EGL_MIN_SWAP_INTERVAL
+    val = value(EGL_MIN_SWAP_INTERVAL);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" min-swap-interval="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_MIN_SWAP_INTERVAL
+    val = value(EGL_MAX_SWAP_INTERVAL);
+    if (val != EGL_DONT_CARE) {
+        addTag(str, QLatin1String(" max-swap-interval="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_LUMINANCE_SIZE
+    val = value(EGL_LUMINANCE_SIZE);
+    if (val != 0) {
+        addTag(str, QLatin1String(" luminance="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_ALPHA_MASK_SIZE
+    val = value(EGL_ALPHA_MASK_SIZE);
+    if (val != 0) {
+        addTag(str, QLatin1String(" alpha-mask="));
+        str += QString::number(val);
+    }
+#endif
+
+#ifdef EGL_CONFORMANT
+    val = value(EGL_CONFORMANT);
+    if (val != 0) {
+        if (val)
+            addTag(str, QLatin1String(" conformant=true"));
+        else
+            addTag(str, QLatin1String(" conformant=false"));
+    }
+#endif
+
+    return str;
+}
+
+QT_END_NAMESPACE
+
+
diff --git a/src/gui/egl/qeglproperties_p.h b/src/gui/egl/qeglproperties_p.h
new file mode 100644
index 0000000..3570f80
--- /dev/null
+++ b/src/gui/egl/qeglproperties_p.h
@@ -0,0 +1,138 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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 http://www.qtsoftware.com/contact.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QEGLPROPERTIES_P_H
+#define QEGLPROPERTIES_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 QGLWidget class.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtCore/qvarlengtharray.h>
+#include <QtGui/qimage.h>
+
+QT_BEGIN_INCLUDE_NAMESPACE
+
+#if defined(QT_GLES_EGL)
+#include <GLES/egl.h>
+#else
+#include <EGL/egl.h>
+#endif
+
+#if defined(Q_WS_X11)
+// If <EGL/egl.h> included <X11/Xlib.h>, then the global namespace
+// may have been polluted with X #define's.  The following makes sure
+// the X11 headers were included properly and then cleans things up.
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#undef Bool
+#undef Status
+#undef None
+#undef KeyPress
+#undef KeyRelease
+#undef FocusIn
+#undef FocusOut
+#undef Type
+#undef FontChange
+#undef CursorShape
+#endif
+
+QT_END_INCLUDE_NAMESPACE
+
+QT_BEGIN_NAMESPACE
+
+namespace QEgl {
+    enum API
+    {
+        OpenGL,
+        OpenVG
+    };
+
+    enum PixelFormatMatch
+    {
+        ExactPixelFormat,
+        BestPixelFormat
+    };
+};
+
+class QX11Info;
+class QPaintDevice;
+
+class Q_GUI_EXPORT QEglProperties
+{
+public:
+    QEglProperties();
+    QEglProperties(const QEglProperties& other) : props(other.props) {}
+    ~QEglProperties() {}
+
+    int value(int name) const;
+    void setValue(int name, int value);
+    bool removeValue(int name);
+    bool isEmpty() const { return props[0] == EGL_NONE; }
+
+    const int *properties() const { return props.constData(); }
+
+    void setPixelFormat(QImage::Format pixelFormat);
+#ifdef Q_WS_X11
+    void setVisualFormat(const QX11Info *xinfo);
+#endif
+    void setRenderableType(QEgl::API api);
+
+    void setPaintDeviceFormat(QPaintDevice *dev);
+
+    bool reduceConfiguration();
+
+    QString toString() const;
+
+private:
+    QVarLengthArray<int> props;
+};
+
+QT_END_NAMESPACE
+
+#endif // QEGLPROPERTIES_P_H