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.

7 files changed, 663 insertions, 0 deletions

diff --git a/src/plugins/graphicssystems/shivavg/README b/src/plugins/graphicssystems/shivavg/README
new file mode 100644
index 0000000..15ee710
--- /dev/null
+++ b/src/plugins/graphicssystems/shivavg/README
@@ -0,0 +1,8 @@
+
+This graphics system uses ShivaVG (http://sourceforge.net/projects/shivavg)
+to perform OpenVG rendering on X11 systems.  The graphics system name for
+the "-graphicssystem" command-line option is "ShivaVG".
+
+ShivaVG support is experimental, mostly to demonstrate how to integrate
+non-EGL OpenVG engines into the system.  It will probably not produce
+good output.
diff --git a/src/plugins/graphicssystems/shivavg/main.cpp b/src/plugins/graphicssystems/shivavg/main.cpp
new file mode 100644
index 0000000..037bfb2
--- /dev/null
+++ b/src/plugins/graphicssystems/shivavg/main.cpp
@@ -0,0 +1,71 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins 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 <private/qgraphicssystemplugin_p.h>
+#include "shivavggraphicssystem.h"
+
+QT_BEGIN_NAMESPACE
+
+class ShivaVGGraphicsSystemPlugin : public QGraphicsSystemPlugin
+{
+public:
+    QStringList keys() const;
+    QGraphicsSystem *create(const QString&);
+};
+
+QStringList ShivaVGGraphicsSystemPlugin::keys() const
+{
+    QStringList list;
+    list << "ShivaVG";
+    return list;
+}
+
+QGraphicsSystem* ShivaVGGraphicsSystemPlugin::create(const QString& system)
+{
+    if (system.toLower() == "shivavg")
+        return new ShivaVGGraphicsSystem;
+
+    return 0;
+}
+
+Q_EXPORT_PLUGIN2(shivavg, ShivaVGGraphicsSystemPlugin)
+
+QT_END_NAMESPACE
diff --git a/src/plugins/graphicssystems/shivavg/shivavg.pro b/src/plugins/graphicssystems/shivavg/shivavg.pro
new file mode 100644
index 0000000..68345af
--- /dev/null
+++ b/src/plugins/graphicssystems/shivavg/shivavg.pro
@@ -0,0 +1,16 @@
+TARGET = qshivavggraphicssystem
+include(../../qpluginbase.pri)
+
+QT += openvg
+
+QTDIR_build:DESTDIR = $$QT_BUILD_TREE/plugins/graphicssystems
+
+SOURCES = main.cpp shivavggraphicssystem.cpp shivavgwindowsurface.cpp
+HEADERS = shivavggraphicssystem.h shivavgwindowsurface.h
+
+target.path += $$[QT_INSTALL_PLUGINS]/graphicssystems
+INSTALLS += target
+
+!isEmpty(QMAKE_INCDIR_OPENVG): INCLUDEPATH += $$QMAKE_INCDIR_OPENVG
+!isEmpty(QMAKE_LIBDIR_OPENVG): LIBS += -L$$QMAKE_LIBDIR_OPENVG
+!isEmpty(QMAKE_LIBS_OPENVG): LIBS += $$QMAKE_LIBS_OPENVG
diff --git a/src/plugins/graphicssystems/shivavg/shivavggraphicssystem.cpp b/src/plugins/graphicssystems/shivavg/shivavggraphicssystem.cpp
new file mode 100644
index 0000000..fb60a42
--- /dev/null
+++ b/src/plugins/graphicssystems/shivavg/shivavggraphicssystem.cpp
@@ -0,0 +1,62 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins 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 "shivavggraphicssystem.h"
+#include "shivavgwindowsurface.h"
+#include <QtGui/private/qpixmap_raster_p.h>
+
+QT_BEGIN_NAMESPACE
+
+ShivaVGGraphicsSystem::ShivaVGGraphicsSystem()
+{
+}
+
+QPixmapData *ShivaVGGraphicsSystem::createPixmapData(QPixmapData::PixelType type) const
+{
+    return new QRasterPixmapData(type);
+}
+
+QWindowSurface *ShivaVGGraphicsSystem::createWindowSurface(QWidget *widget) const
+{
+    return new ShivaVGWindowSurface(widget);
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/graphicssystems/shivavg/shivavggraphicssystem.h b/src/plugins/graphicssystems/shivavg/shivavggraphicssystem.h
new file mode 100644
index 0000000..1c9ec70
--- /dev/null
+++ b/src/plugins/graphicssystems/shivavg/shivavggraphicssystem.h
@@ -0,0 +1,60 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins 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 SHIVAVGGRAPHICSSYSTEM_H
+#define SHIVAVGGRAPHICSSYSTEM_H
+
+#include <QtGui/private/qgraphicssystem_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class ShivaVGGraphicsSystem : public QGraphicsSystem
+{
+public:
+    ShivaVGGraphicsSystem();
+
+    QPixmapData *createPixmapData(QPixmapData::PixelType type) const;
+    QWindowSurface *createWindowSurface(QWidget *widget) const;
+};
+
+QT_END_NAMESPACE
+
+#endif
diff --git a/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp b/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp
new file mode 100644
index 0000000..bf1f942
--- /dev/null
+++ b/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.cpp
@@ -0,0 +1,370 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#define GL_GLEXT_PROTOTYPES
+#include "shivavgwindowsurface.h"
+#include <QtOpenVG/private/qpaintengine_vg_p.h>
+#if defined(Q_WS_X11)
+#include "private/qt_x11_p.h"
+#include "qx11info_x11.h"
+#include <GL/glx.h>
+
+extern QX11Info *qt_x11Info(const QPaintDevice *pd);
+#endif
+
+// Define this to use framebuffer objects.
+//#define QVG_USE_FBO 1
+
+#include <vg/openvg.h>
+
+QT_BEGIN_NAMESPACE
+
+class QShivaContext
+{
+public:
+    QShivaContext();
+    ~QShivaContext();
+
+    bool makeCurrent(ShivaVGWindowSurfacePrivate *surface);
+    void doneCurrent();
+
+    bool initialized;
+    QSize currentSize;
+    ShivaVGWindowSurfacePrivate *currentSurface;
+};
+
+Q_GLOBAL_STATIC(QShivaContext, shivaContext);
+
+class ShivaVGWindowSurfacePrivate
+{
+public:
+    ShivaVGWindowSurfacePrivate()
+        : isCurrent(false)
+        , needsResize(true)
+        , engine(0)
+#if defined(QVG_USE_FBO)
+        , fbo(0)
+        , texture(0)
+#endif
+#if defined(Q_WS_X11)
+        , drawable(0)
+        , context(0)
+#endif
+    {
+    }
+    ~ShivaVGWindowSurfacePrivate();
+
+    void ensureContext(QWidget *widget);
+
+    QSize size;
+    bool isCurrent;
+    bool needsResize;
+    QVGPaintEngine *engine;
+#if defined(QVG_USE_FBO)
+    GLuint fbo;
+    GLuint texture;
+#endif
+#if defined(Q_WS_X11)
+    GLXDrawable drawable;
+    GLXContext context;
+#endif
+};
+
+QShivaContext::QShivaContext()
+    : initialized(false)
+    , currentSurface(0)
+{
+}
+
+QShivaContext::~QShivaContext()
+{
+    if (initialized)
+        vgDestroyContextSH();
+}
+
+bool QShivaContext::makeCurrent(ShivaVGWindowSurfacePrivate *surface)
+{
+    if (currentSurface)
+        currentSurface->isCurrent = false;
+    surface->isCurrent = true;
+    currentSurface = surface;
+    currentSize = surface->size;
+#if defined(Q_WS_X11)
+    glXMakeCurrent(X11->display, surface->drawable, surface->context);
+#endif
+    if (!initialized) {
+        if (!vgCreateContextSH(currentSize.width(), currentSize.height())) {
+            qWarning("vgCreateContextSH(%d, %d): could not create context", currentSize.width(), currentSize.height());
+            return false;
+        }
+        initialized = true;
+    } else {
+        vgResizeSurfaceSH(currentSize.width(), currentSize.height());
+    }
+#if defined(QVG_USE_FBO)
+    if (surface->fbo)
+        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, surface->fbo);
+    else
+        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+#endif
+    return true;
+}
+
+void QShivaContext::doneCurrent()
+{
+    if (currentSurface) {
+        currentSurface->isCurrent = false;
+        currentSurface = 0;
+    }
+#if defined(Q_WS_X11)
+    glXMakeCurrent(X11->display, 0, 0);
+#endif
+}
+
+ShivaVGWindowSurfacePrivate::~ShivaVGWindowSurfacePrivate()
+{
+#if defined(QVG_USE_FBO)
+    if (fbo) {
+        glDeleteTextures(1, &texture);
+        glDeleteFramebuffersEXT(1, &fbo);
+    }
+#endif
+}
+
+void ShivaVGWindowSurfacePrivate::ensureContext(QWidget *widget)
+{
+#if defined(Q_WS_X11)
+    Window win = widget->winId();
+    if (win != drawable) {
+        if (context)
+            glXDestroyContext(X11->display, context);
+        drawable = win;
+    }
+    if (context == 0) {
+        const QX11Info *xinfo = qt_x11Info(widget);
+        int spec[64];
+        int i = 0;
+        spec[i++] = GLX_DOUBLEBUFFER;
+        spec[i++] = GLX_DEPTH_SIZE;
+        spec[i++] = 1;
+        spec[i++] = GLX_STENCIL_SIZE;
+        spec[i++] = 1;
+        spec[i++] = GLX_RGBA;
+        spec[i++] = GLX_RED_SIZE;
+        spec[i++] = 1;
+        spec[i++] = GLX_GREEN_SIZE;
+        spec[i++] = 1;
+        spec[i++] = GLX_BLUE_SIZE;
+        spec[i++] = 1;
+        spec[i++] = GLX_SAMPLE_BUFFERS_ARB;
+        spec[i++] = 1;
+        spec[i++] = GLX_SAMPLES_ARB;
+        spec[i++] = 4;
+        spec[i] = XNone;
+        XVisualInfo *visual = glXChooseVisual
+            (xinfo->display(), xinfo->screen(), spec);
+        context = glXCreateContext(X11->display, visual, 0, True);
+        if (!context)
+            qWarning("glXCreateContext: could not create GL context for VG rendering");
+    }
+#else
+    Q_UNUSED(widget);
+#endif
+#if defined(QVG_USE_FBO)
+    if (needsResize && fbo) {
+#if defined(Q_WS_X11)
+        glXMakeCurrent(X11->display, drawable, context);
+#endif
+        glDeleteTextures(1, &texture);
+        glDeleteFramebuffersEXT(1, &fbo);
+#if defined(Q_WS_X11)
+        glXMakeCurrent(X11->display, 0, 0);
+#endif
+        fbo = 0;
+        texture = 0;
+    }
+    if (!fbo) {
+#if defined(Q_WS_X11)
+        glXMakeCurrent(X11->display, drawable, context);
+#endif
+        glGenFramebuffersEXT(1, &fbo);
+        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
+
+        glGenTextures(1, &texture);
+        glBindTexture(GL_TEXTURE_2D, texture);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, size.width(), size.height(), 0,
+                     GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        glFramebufferTexture2DEXT
+            (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D,
+             texture, 0);
+
+        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+#if defined(Q_WS_X11)
+        glXMakeCurrent(X11->display, 0, 0);
+#endif
+    }
+#endif
+    needsResize = false;
+}
+
+ShivaVGWindowSurface::ShivaVGWindowSurface(QWidget *window)
+    : QWindowSurface(window), d_ptr(new ShivaVGWindowSurfacePrivate)
+{
+}
+
+ShivaVGWindowSurface::~ShivaVGWindowSurface()
+{
+    if (d_ptr->isCurrent) {
+        shivaContext()->doneCurrent();
+        glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+    }
+#if defined(Q_WS_X11)
+    if (d_ptr->context)
+        glXDestroyContext(X11->display, d_ptr->context);
+#endif
+    delete d_ptr;
+}
+
+QPaintDevice *ShivaVGWindowSurface::paintDevice()
+{
+    d_ptr->ensureContext(window());
+    shivaContext()->makeCurrent(d_ptr);
+    glClearDepth(0.0f);
+    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+    return this;
+}
+
+void ShivaVGWindowSurface::flush(QWidget *widget, const QRegion &region, const QPoint &offset)
+{
+    Q_UNUSED(region);
+    Q_UNUSED(offset);
+    QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget();
+    d_ptr->ensureContext(parent);
+    QShivaContext *context = shivaContext();
+    if (!d_ptr->isCurrent)
+        context->makeCurrent(d_ptr);
+#if defined(QVG_USE_FBO)
+    glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
+    if (d_ptr->fbo) {
+        static GLfloat const vertices[][2] = {
+            {-1, -1}, {1, -1}, {1, 1}, {-1, 1}
+        };
+        static GLfloat const texCoords[][2] = {
+            {0, 0}, {1, 0}, {1, 1}, {0, 1}
+        };
+        glMatrixMode(GL_PROJECTION);
+        glLoadIdentity();
+        glMatrixMode(GL_MODELVIEW);
+        glLoadIdentity();
+        glVertexPointer(2, GL_FLOAT, 0, vertices);
+        glTexCoordPointer(2, GL_FLOAT, 0, texCoords);
+        glBindTexture(GL_TEXTURE_2D, d_ptr->texture);
+        glEnable(GL_TEXTURE_2D);
+        glEnableClientState(GL_VERTEX_ARRAY);
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        glDisableClientState(GL_VERTEX_ARRAY);
+        glDisable(GL_TEXTURE_2D);
+        glBindTexture(GL_TEXTURE_2D, 0);
+    }
+#endif
+#if defined(Q_WS_X11)
+    glXSwapBuffers(X11->display, d_ptr->drawable);
+#endif
+    context->doneCurrent();
+}
+
+void ShivaVGWindowSurface::setGeometry(const QRect &rect)
+{
+    QWindowSurface::setGeometry(rect);
+    d_ptr->needsResize = true;
+    d_ptr->size = rect.size();
+}
+
+bool ShivaVGWindowSurface::scroll(const QRegion &area, int dx, int dy)
+{
+    return QWindowSurface::scroll(area, dx, dy);
+}
+
+void ShivaVGWindowSurface::beginPaint(const QRegion &region)
+{
+    // Nothing to do here.
+    Q_UNUSED(region);
+}
+
+void ShivaVGWindowSurface::endPaint(const QRegion &region)
+{
+    // Nothing to do here.
+    Q_UNUSED(region);
+}
+
+Q_GLOBAL_STATIC(QVGPaintEngine, sharedPaintEngine);
+
+QPaintEngine *ShivaVGWindowSurface::paintEngine() const
+{
+    if (!d_ptr->engine)
+        d_ptr->engine = sharedPaintEngine();
+    return d_ptr->engine;
+}
+
+// We need to get access to QWidget::metric() from ShivaVGWindowSurface::metric,
+// but it is not a friend of QWidget.  To get around this, we create a
+// fake QX11PaintEngine class, which is a friend.
+class QX11PaintEngine
+{
+public:
+    static int metric(const QWidget *widget, QPaintDevice::PaintDeviceMetric met)
+    {
+        return widget->metric(met);
+    }
+};
+
+int ShivaVGWindowSurface::metric(PaintDeviceMetric met) const
+{
+    return QX11PaintEngine::metric(window(), met);
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.h b/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.h
new file mode 100644
index 0000000..5211ba4
--- /dev/null
+++ b/src/plugins/graphicssystems/shivavg/shivavgwindowsurface.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the plugins 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 SHIVAVGWINDOWSURFACE_H
+#define SHIVAVGWINDOWSURFACE_H
+
+#include <QtGui/private/qwindowsurface_p.h>
+
+QT_BEGIN_NAMESPACE
+
+class ShivaVGWindowSurfacePrivate;
+
+class ShivaVGWindowSurface : public QWindowSurface, public QPaintDevice
+{
+public:
+    ShivaVGWindowSurface(QWidget *window);
+    virtual ~ShivaVGWindowSurface();
+
+    QPaintDevice *paintDevice();
+    void flush(QWidget *widget, const QRegion &region, const QPoint &offset);
+    void setGeometry(const QRect &rect);
+    bool scroll(const QRegion &area, int dx, int dy);
+
+    void beginPaint(const QRegion &region);
+    void endPaint(const QRegion &region);
+
+    QPaintEngine *paintEngine() const;
+
+protected:
+    int metric(PaintDeviceMetric metric) const;
+
+private:
+    ShivaVGWindowSurfacePrivate *d_ptr;
+};
+
+QT_END_NAMESPACE
+
+#endif