Remove the QWidget compositor example

The QWidget API isn't well fit for a Wayland compositor, and does
not have any advantage over a QWindow, which can also draw using
QPainter. Besides the current implementation doesn't work properly,
and no one seems to be interested in fixing it.

Change-Id: Id1c337506af48e1d1fdd8d14f0ed637d299702f3
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>

6 files changed, 0 insertions, 652 deletions

diff --git a/examples/examples.pro b/examples/examples.pro
index 2d4cd1bb..d633fb92 100644
--- a/examples/examples.pro
+++ b/examples/examples.pro
@@ -5,10 +5,6 @@ TEMPLATE=subdirs
 contains(CONFIG, wayland-compositor) {
     SUBDIRS += qwindow-compositor
 
-    qtHaveModule(widgets) {
-        SUBDIRS += qwidget-compositor
-    }
-
     qtHaveModule(quick) {
         SUBDIRS += qml-compositor
     }
diff --git a/examples/qwidget-compositor/main.cpp b/examples/qwidget-compositor/main.cpp
deleted file mode 100644
index 7a268fbd..00000000
--- a/examples/qwidget-compositor/main.cpp
+++ /dev/null
@@ -1,394 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the Qt Compositor.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
-**     of its contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qwaylandcompositor.h"
-
-#include "qwaylandsurface.h"
-#include <QtCompositor/qwaylandinput.h>
-
-#include <QApplication>
-#include <QWidget>
-#include <QTimer>
-#include <QPainter>
-#include <QMouseEvent>
-#include <QtCore/QLinkedList>
-
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-#include <QOpenGLContext>
-#include <QGLWidget>
-#include <QtGui/private/qopengltexturecache_p.h>
-#include "textureblitter.h"
-#include <QOpenGLFunctions>
-#endif
-
-#include <QDebug>
-
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-class QWidgetCompositor : public QGLWidget, public QWaylandCompositor
-#else
-class QWidgetCompositor : public QWidget, public WaylandCompositor
-#endif
-{
-    Q_OBJECT
-public:
-    QWidgetCompositor()
-        : QWaylandCompositor(windowHandle(), 0, DefaultExtensions | SubSurfaceExtension)
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-        , m_surfaceCompositorFbo(0)
-        , m_textureBlitter(0)
-        , m_textureCache(0)
-#endif
-        , m_moveSurface(0)
-        , m_dragSourceSurface(0)
-        , m_cursorSurface(0)
-    {
-        setMouseTracking(true);
-        setRetainedSelectionEnabled(true);
-        m_background = QImage(QLatin1String(":/background.jpg"));
-        //make sure we get the window id and create the glcontext
-        //so that clients can successfully initialize egl
-        winId();
-    }
-
-private slots:
-    void surfaceDestroyed(QObject *object) {
-        QWaylandSurface *surface = static_cast<QWaylandSurface *>(object);
-        m_surfaces.removeAll(surface);
-        update();
-    }
-
-    void surfaceMapped() {
-        QWaylandSurface *surface = qobject_cast<QWaylandSurface *>(sender());
-        QPoint pos;
-        if (!m_surfaces.contains(surface)) {
-            uint px = 1 + (qrand() % (width() - surface->size().width() - 2));
-            uint py = 1 + (qrand() % (height() - surface->size().height() - 2));
-            pos = QPoint(px, py);
-            surface->setPos(pos);
-            if (surface->hasShellSurface())
-                m_surfaces.append(surface);
-        }
-        if (surface->hasShellSurface())
-            defaultInputDevice()->setKeyboardFocus(surface);
-        update();
-    }
-
-    void surfaceCommitted() {
-        QWaylandSurface *surface = qobject_cast<QWaylandSurface *>(sender());
-        surfaceCommitted(surface);
-    }
-
-protected:
-    void surfaceCommitted(QWaylandSurface *surface)
-    {
-        Q_UNUSED(surface);
-        update();
-    }
-
-    void surfaceCreated(QWaylandSurface *surface) {
-        connect(surface, SIGNAL(destroyed(QObject *)), this, SLOT(surfaceDestroyed(QObject *)));
-        connect(surface, SIGNAL(mapped()), this, SLOT(surfaceMapped()));
-        connect(surface, SIGNAL(committed()), this, SLOT(surfaceCommitted()));
-        update();
-    }
-
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-    GLuint composeSurface(QWaylandSurface *surface) {
-        GLuint texture = 0;
-        QOpenGLFunctions *functions = QOpenGLContext::currentContext()->functions();
-
-        QSize windowSize = surface->size();
-        surface->swapBuffers();
-
-        if (!m_surfaceCompositorFbo)
-            functions->glGenFramebuffers(1,&m_surfaceCompositorFbo);
-
-        functions->glBindFramebuffer(GL_FRAMEBUFFER, m_surfaceCompositorFbo);
-
-        if (surface->type() == QWaylandSurface::Shm) {
-            texture = m_textureCache->bindTexture(context()->contextHandle(), surface->image());
-        } else {
-            texture = surface->texture();
-        }
-
-        functions->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
-                                           GL_TEXTURE_2D, texture, 0);
-        paintChildren(surface,surface,windowSize);
-        functions->glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
-                                           GL_TEXTURE_2D, 0, 0);
-
-        functions->glBindFramebuffer(GL_FRAMEBUFFER, 0);
-        return texture;
-    }
-
-    void paintChildren(QWaylandSurface *surface, QWaylandSurface *window, const QSize &windowSize) {
-
-        if (surface->subSurfaces().size() == 0)
-            return;
-
-        QLinkedListIterator<QWaylandSurface *> i(surface->subSurfaces());
-        while (i.hasNext()) {
-            QWaylandSurface *subSurface = i.next();
-            QPointF p = subSurface->mapTo(window,QPoint(0,0));
-            QSize size = subSurface->size();
-            subSurface->swapBuffers();
-            if (size.isValid()) {
-                GLuint texture = 0;
-                if (subSurface->type() == QWaylandSurface::Texture) {
-                    texture = subSurface->texture();
-                } else if (surface->type() == QWaylandSurface::Shm ) {
-                    texture = m_textureCache->bindTexture(context()->contextHandle(), surface->image());
-                }
-                m_textureBlitter->drawTexture(texture,QRect(p.toPoint(),size),windowSize,0,window->isYInverted(),subSurface->isYInverted());
-            }
-            paintChildren(subSurface,window,windowSize);
-        }
-    }
-#else //hmmm, this is actually untested :(
-    QImage composeSurface(WaylandSurface *surface)
-    {
-        Q_ASSER(surface->type() == WaylandSurface::Shm);
-        QImage img = surface->image();
-        QPainter p(&img);
-        paintChildren(surface,p,surface);
-
-        return img;
-    }
-
-    void paintChildren(WaylandSurface *surface, QPainter *painter, WaylandSurface *window) {
-        if (surface->subSurfaces().size() == 0)
-            return;
-
-        QLinkedListIterator<WaylandSurface *> i(surface->subSurfaces());
-        while (i.hasNext()) {
-            WaylandSurface *subSurface = i.next();
-            QPoint p = subSurface->mapTo(window,QPoint(0,0));
-            QRect geo = subSurface->geometry();
-            geo.moveTo(p);
-            if (geo.isValid()) {
-                painter->drawImage(p,subSurface->image());
-            }
-            paintChildren(subSurface,painter,window);
-        }
-    }
-#endif //QT_COMPOSITOR_WAYLAND_GL
-
-
-
-    void paintEvent(QPaintEvent *) {
-        QPainter p(this);
-
-        frameStarted();
-        if (!m_background.isNull())
-            p.drawPixmap(rect(), m_backgroundScaled);
-
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-        cleanupGraphicsResources();
-        if (!m_textureCache) {
-            m_textureCache = new QOpenGLTextureCache(context()->contextHandle());
-        }
-        if (!m_textureBlitter) {
-            m_textureBlitter = new TextureBlitter();
-        }
-        m_textureBlitter->bind();
-#endif
-        for (int i = 0; i < m_surfaces.size(); ++i) {
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-            GLuint texture = composeSurface(m_surfaces.at(i));
-            QWaylandSurface *surface = m_surfaces.at(i);
-            QRect geo(surface->pos().toPoint(),surface->size());
-            m_textureBlitter->drawTexture(texture,geo,size(),0,false,m_surfaces.at(i)->isYInverted());
-#else
-            QImage img = composeSurface(m_surfaces.at(i));
-            p.drawImage(m_surfaces.at(i)->geometry().topLeft(),img);
-#endif //QT_COMPOSITOR_WAYLAND_GL
-        }
-
-        sendFrameCallbacks(surfaces());
-
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-        //jl:FIX FIX FIX:)
-//        update();
-        m_textureBlitter->release();
-#endif
-    }
-
-    void resizeEvent(QResizeEvent *)
-    {
-        if (!m_background.isNull()) {
-            m_backgroundScaled = QPixmap::fromImage(m_background.scaled(size(),
-                Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
-        }
-    }
-
-    void raise(QWaylandSurface *surface) {
-        defaultInputDevice()->setKeyboardFocus(surface);
-        update();
-        m_surfaces.removeOne(surface);
-        m_surfaces.append(surface);
-    }
-
-    void mousePressEvent(QMouseEvent *e) {
-        m_cursorPos = e->pos();
-        QPointF local;
-        if (QWaylandSurface *surface = surfaceAt(e->pos(), &local)) {
-            raise(surface);
-            if (e->modifiers() & Qt::ControlModifier) {
-                m_moveSurface = surface;
-                m_moveOffset = local;
-            } else {
-                defaultInputDevice()->sendMousePressEvent(e->button(), local.toPoint(),e->pos());
-            }
-        }
-    }
-
-    void mouseMoveEvent(QMouseEvent *e) {
-        m_cursorPos = e->pos();
-        if (isDragging()) {
-            QPoint global = e->pos(); // "global" here means the window of the compositor
-            QPointF local;
-            QWaylandSurface *surface = surfaceAt(e->pos(), &local);
-            if (surface) {
-                if (!m_dragSourceSurface)
-                    m_dragSourceSurface = surface;
-                if (m_dragSourceSurface == surface)
-                    m_lastDragSourcePos = local;
-                raise(surface);
-            }
-            //this should go away when draggin is reimplemented
-            sendDragMoveEvent(global, local.toPoint(), surface);
-            return;
-        }
-        if (m_moveSurface) {
-            m_moveSurface->setPos(e->localPos() - m_moveOffset);
-            update();
-            return;
-        }
-        QPointF local;
-        if (surfaceAt(e->pos(), &local))
-            defaultInputDevice()->sendMouseMoveEvent(local.toPoint(),pos());
-    }
-
-    void mouseReleaseEvent(QMouseEvent *e) {
-        if (isDragging()) {
-            sendDragEndEvent();
-            if (m_dragSourceSurface) {
-                // Must send a release event to the source too, no matter where the cursor is now.
-                // This is a hack and should go away when we reimplement draging
-                defaultInputDevice()->sendMouseReleaseEvent(e->button(), m_lastDragSourcePos.toPoint(), e->pos());
-                m_dragSourceSurface = 0;
-            }
-        }
-        if (m_moveSurface) {
-            m_moveSurface = 0;
-            return;
-        }
-        QPointF local;
-        if (surfaceAt(e->pos(), &local))
-            defaultInputDevice()->sendMouseReleaseEvent(e->button(), local.toPoint(), e->pos());
-    }
-
-    void keyPressEvent(QKeyEvent *event)
-    {
-        defaultInputDevice()->sendKeyPressEvent(event->nativeScanCode());
-    }
-
-    void keyReleaseEvent(QKeyEvent *event)
-    {
-        defaultInputDevice()->sendKeyReleaseEvent(event->nativeScanCode());
-    }
-
-    QWaylandSurface *surfaceAt(const QPointF &point, QPointF *local = 0) {
-        for (int i = m_surfaces.size() - 1; i >= 0; --i) {
-            QWaylandSurface *surface = m_surfaces.at(i);
-            QRect geo(surface->pos().toPoint(),surface->size());
-            if (geo.contains(point.toPoint())) {
-                if (local)
-                    *local = point - surface->pos();
-                return surface;
-            }
-        }
-        return 0;
-    }
-
-    void setCursorSurface(QWaylandSurface *surface, int hotspotX, int hotspotY) {
-        m_cursorSurface = surface;
-        m_cursorHotspot = QPoint(hotspotX, hotspotY);
-        update();
-    }
-
-private:
-    QImage m_background;
-    QPixmap m_backgroundScaled;
-
-    QList<QWaylandSurface *> m_surfaces;
-
-#ifdef QT_COMPOSITOR_WAYLAND_GL
-    GLuint m_surfaceCompositorFbo;
-    TextureBlitter *m_textureBlitter;
-    QOpenGLTextureCache *m_textureCache;
-#endif
-
-    QWaylandSurface *m_moveSurface;
-    QPointF m_moveOffset;
-    QWaylandSurface *m_dragSourceSurface;
-    QPointF m_lastDragSourcePos;
-
-    QWaylandSurface* m_cursorSurface;
-    QPoint m_cursorPos;
-    QPoint m_cursorHotspot;
-
-    friend class TouchObserver;
-};
-
-int main(int argc, char *argv[])
-{
-    QApplication app(argc, argv);
-
-    QWidgetCompositor compositor;
-    compositor.resize(800, 600);
-    compositor.show();
-
-//    QTouchScreenHandlerThread t(QString(), new TouchObserver(&compositor));
-
-    return app.exec();
-}
-
-#include "main.moc"
diff --git a/examples/qwidget-compositor/qwidget-compositor.pro b/examples/qwidget-compositor/qwidget-compositor.pro
deleted file mode 100644
index 688175b9..00000000
--- a/examples/qwidget-compositor/qwidget-compositor.pro
+++ /dev/null
@@ -1,23 +0,0 @@
-#  if you want to compile QtCompositor as part of the application
-#  instead of linking to it, remove the QT += compositor and uncomment
-#  the following line
-#include (../../src/qt-compositor/qt-compositor.pri)
-
-# to make QtCompositor/... style includes working without installing
-INCLUDEPATH += $$PWD/../../include
-
-HEADERS += \
-            textureblitter.h
-
-SOURCES += \
-            main.cpp \
-            textureblitter.cpp
-
-QT += core-private gui-private widgets widgets-private opengl opengl-private compositor
-
-RESOURCES += qwidget-compositor.qrc
-
-target.path = $$[QT_INSTALL_EXAMPLES]/qtwayland/qwidget-compositor
-sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS qwidget-compositor.pro
-sources.path = $$[QT_INSTALL_EXAMPLES]/qtwayland/qwidget-compositor
-INSTALLS += target sources
diff --git a/examples/qwidget-compositor/qwidget-compositor.qrc b/examples/qwidget-compositor/qwidget-compositor.qrc
deleted file mode 100644
index 20dd10a5..00000000
--- a/examples/qwidget-compositor/qwidget-compositor.qrc
+++ /dev/null
@@ -1,5 +0,0 @@
-<RCC>
-    <qresource prefix="/">
-        <file alias="background.jpg">../qml-compositor/background.jpg</file>
-    </qresource>
-</RCC>
diff --git a/examples/qwidget-compositor/textureblitter.cpp b/examples/qwidget-compositor/textureblitter.cpp
deleted file mode 100644
index 5607274b..00000000
--- a/examples/qwidget-compositor/textureblitter.cpp
+++ /dev/null
@@ -1,158 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the Qt Compositor.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
-**     of its contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "textureblitter.h"
-
-#include <QtGui/QOpenGLShaderProgram>
-#include <QtGui/QOpenGLContext>
-#include <QtGui/QOpenGLFunctions>
-
-TextureBlitter::TextureBlitter()
-    : m_shaderProgram(new QOpenGLShaderProgram())
-{
-    static const char *textureVertexProgram =
-            "uniform highp mat4 matrix;\n"
-            "attribute highp vec3 vertexCoordEntry;\n"
-            "attribute highp vec2 textureCoordEntry;\n"
-            "varying highp vec2 textureCoord;\n"
-            "void main() {\n"
-            "   textureCoord = textureCoordEntry;\n"
-            "   gl_Position = matrix * vec4(vertexCoordEntry, 1);\n"
-            "}\n";
-
-    static const char *textureFragmentProgram =
-            "uniform sampler2D texture;\n"
-            "varying highp vec2 textureCoord;\n"
-            "void main() {\n"
-            "   gl_FragColor = texture2D(texture, textureCoord);\n"
-            "}\n";
-
-    //Enable transparent windows
-    glEnable(GL_BLEND);
-    glBlendFunc (GL_ONE,GL_ONE_MINUS_SRC_ALPHA);
-
-    m_shaderProgram->addShaderFromSourceCode(QOpenGLShader::Vertex, textureVertexProgram);
-    m_shaderProgram->addShaderFromSourceCode(QOpenGLShader::Fragment, textureFragmentProgram);
-    m_shaderProgram->link();
-}
-
-
-void TextureBlitter::bind()
-{
-
-    m_shaderProgram->bind();
-
-    m_vertexCoordEntry = m_shaderProgram->attributeLocation("vertexCoordEntry");
-    m_textureCoordEntry = m_shaderProgram->attributeLocation("textureCoordEntry");
-    m_matrixLocation = m_shaderProgram->uniformLocation("matrix");
-}
-
-void TextureBlitter::release()
-{
-    m_shaderProgram->release();
-}
-
-void TextureBlitter::drawTexture(int textureId, const QRectF &targetRect, const QSize &targetSize, int depth, bool targethasInvertedY, bool sourceHasInvertedY)
-{
-
-    glViewport(0,0,targetSize.width(),targetSize.height());
-    GLfloat zValue = depth / 1000.0f;
-    //Set Texture and Vertex coordinates
-    const GLfloat textureCoordinates[] = {
-        0, 0,
-        1, 0,
-        1, 1,
-        0, 1
-    };
-
-    GLfloat x1 = targetRect.left();
-    GLfloat x2 = targetRect.right();
-    GLfloat y1, y2;
-    if (targethasInvertedY) {
-        if (sourceHasInvertedY) {
-            y1 = targetRect.top();
-            y2 = targetRect.bottom();
-        } else {
-            y1 = targetRect.bottom();
-            y2 = targetRect.top();
-        }
-    } else {
-        if (sourceHasInvertedY) {
-            y1 = targetSize.height() - targetRect.top();
-            y2 = targetSize.height() - targetRect.bottom();
-        } else {
-            y1 = targetSize.height() - targetRect.bottom();
-            y2 = targetSize.height() - targetRect.top();
-        }
-    }
-
-    const GLfloat vertexCoordinates[] = {
-        GLfloat(x1), GLfloat(y1), zValue,
-        GLfloat(x2), GLfloat(y1), zValue,
-        GLfloat(x2), GLfloat(y2), zValue,
-        GLfloat(x1), GLfloat(y2), zValue
-    };
-
-    //Set matrix to transfrom geometry values into gl coordinate space.
-    m_transformMatrix.setToIdentity();
-    m_transformMatrix.scale( 2.0f / targetSize.width(), 2.0f / targetSize.height() );
-    m_transformMatrix.translate(-targetSize.width() / 2.0f, -targetSize.height() / 2.0f);
-
-    //attach the data!
-    QOpenGLContext *currentContext = QOpenGLContext::currentContext();
-    currentContext->functions()->glEnableVertexAttribArray(m_vertexCoordEntry);
-    currentContext->functions()->glEnableVertexAttribArray(m_textureCoordEntry);
-
-    currentContext->functions()->glVertexAttribPointer(m_vertexCoordEntry, 3, GL_FLOAT, GL_FALSE, 0, vertexCoordinates);
-    currentContext->functions()->glVertexAttribPointer(m_textureCoordEntry, 2, GL_FLOAT, GL_FALSE, 0, textureCoordinates);
-    m_shaderProgram->setUniformValue(m_matrixLocation, m_transformMatrix);
-
-    glBindTexture(GL_TEXTURE_2D, textureId);
-
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-
-    glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
-
-    glBindTexture(GL_TEXTURE_2D, 0);
-
-    currentContext->functions()->glDisableVertexAttribArray(m_vertexCoordEntry);
-    currentContext->functions()->glDisableVertexAttribArray(m_textureCoordEntry);
-}
diff --git a/examples/qwidget-compositor/textureblitter.h b/examples/qwidget-compositor/textureblitter.h
deleted file mode 100644
index 9a6ce59e..00000000
--- a/examples/qwidget-compositor/textureblitter.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the Qt Compositor.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
-**     of its contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef TEXTUREBLITTER_H
-#define TEXTUREBLITTER_H
-
-#include <QtGui/QMatrix4x4>
-
-#include <QtGui/qopengl.h>
-
-class QOpenGLShaderProgram;
-class TextureBlitter
-{
-public:
-    TextureBlitter();
-    void bind();
-    void release();
-    void drawTexture(int textureId, const QRectF &sourceGeometry,
-                     const QSize &targetRect, int depth,
-                     bool targethasInvertedY, bool sourceHasInvertedY);
-
-private:
-    QOpenGLShaderProgram *m_shaderProgram;
-    QMatrix4x4 m_transformMatrix;
-
-    int m_matrixLocation;
-    int m_vertexCoordEntry;
-    int m_textureCoordEntry;
-};
-
-#endif // TEXTUREBLITTER_H