1 files changed, 183 insertions, 0 deletions
diff --git a/src/widgets/kernel/qopenglwidget.cpp b/src/widgets/kernel/qopenglwidget.cpp
new file mode 100644
index 0000000000..a5f81a9df8
--- /dev/null
+++ b/src/widgets/kernel/qopenglwidget.cpp
@@ -0,0 +1,183 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWidgets module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qopenglwidget_p.h"
+#include <QOpenGLContext>
+#include <QtWidgets/private/qwidget_p.h>
+
+#include <QOpenGLFramebufferObject>
+#include <QWindow>
+#include <qpa/qplatformwindow.h>
+#include <QDebug>
+#include <QtGui/QGuiApplication>
+#include <QtGui/QScreen>
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLWidgetPrivate : public QWidgetPrivate
+{
+    Q_DECLARE_PUBLIC(QOpenGLWidget)
+public:
+    QOpenGLWidgetPrivate()
+        : fbo(0), uninitialized(true)
+    {
+        setRenderToTexture();
+    }
+    GLuint textureId() const { return fbo ? fbo->texture() : 0; }
+
+    const QSurface *surface() const { return q_func()->window()->windowHandle(); }
+    QSurface *surface() { return q_func()->window()->windowHandle(); }
+    void initialize();
+
+    QOpenGLContext context;
+    QOpenGLFramebufferObject *fbo;
+    bool uninitialized;
+
+    int w,h;
+};
+
+void QOpenGLWidgetPrivate::initialize()
+{
+    Q_Q(QOpenGLWidget);
+    if (!uninitialized)
+        return;
+    context.setShareContext(get(q->window())->shareContext());
+    context.setFormat(surface()->format());
+    context.create();
+    context.makeCurrent(surface());
+    q->initializeGL();
+    uninitialized = false;
+}
+
+QOpenGLWidget::QOpenGLWidget(QWidget *parent, Qt::WindowFlags f)
+    : QWidget(*(new QOpenGLWidgetPrivate), parent, f)
+{
+}
+
+QOpenGLWidget::~QOpenGLWidget()
+{
+}
+
+bool QOpenGLWidget::isValid() const
+{
+    Q_D(const QOpenGLWidget);
+    return d->context.isValid();
+}
+
+void QOpenGLWidget::makeCurrent()
+{
+    Q_D(QOpenGLWidget);
+    d->context.makeCurrent(d->surface());
+    d->fbo->bind();
+}
+
+void QOpenGLWidget::doneCurrent()
+{
+    Q_D(QOpenGLWidget);
+    d->context.doneCurrent();
+}
+
+QSurfaceFormat QOpenGLWidget::format() const
+{
+    Q_D(const QOpenGLWidget);
+    return d->surface()->format();
+}
+
+GLuint QOpenGLWidget::defaultFramebufferObject() const
+{
+    Q_D(const QOpenGLWidget);
+    return d->fbo ? d->fbo->handle() : 0;
+}
+
+void QOpenGLWidget::initializeGL()
+{
+
+}
+
+void QOpenGLWidget::resizeGL(int w, int h)
+{
+    Q_UNUSED(w);
+    Q_UNUSED(h);
+}
+
+void QOpenGLWidget::paintGL()
+{
+}
+
+void QOpenGLWidget::updateGL()
+{
+    makeCurrent();
+    paintGL();
+    glFlush();
+    doneCurrent();
+    update();
+}
+
+
+void QOpenGLWidget::resizeEvent(QResizeEvent *)
+{
+    Q_D(QOpenGLWidget);
+    d->w = width();
+    d->h = height();
+    d->initialize();
+
+    d->context.makeCurrent(d->surface());
+    delete d->fbo; // recreate when resized
+    d->fbo = new QOpenGLFramebufferObject(size());
+    d->fbo->bind();
+    glBindTexture(GL_TEXTURE_2D, d->fbo->texture());
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+    resizeGL(width(), height());
+    paintGL();
+    glFlush();
+}
+
+void QOpenGLWidget::paintEvent(QPaintEvent *)
+{
+    qWarning("QOpenGLWidget does not support paintEvent() yet.");
+    return;
+}
+
+QT_END_NAMESPACE