Cleanup of QGLPaintDevice before it goes in

This is the last patch in the QGLPaintDevice series. Although previous
patches have not been reviewed individually, Samuel's reviewed
QGLPaintDevice API and all the changes as the code stands with this
patch.

Reviewed-by: Samuel

9 files changed, 38 insertions, 430 deletions

diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 8ad9860..a0b2d3a 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -4851,243 +4851,6 @@ Q_OPENGL_EXPORT const QString qt_gl_library_name()
 }
 #endif
 
-#if 0
-void QGLDrawable::setDevice(QPaintDevice *pdev)
-{
-    wasBound = false;
-    widget = 0;
-    buffer = 0;
-    fbo = 0;
-#ifdef Q_WS_QWS
-    wsurf = 0;
-#endif
-
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    if (pdev->devType() == QInternal::Pixmap) {
-        QPixmapData *data = static_cast<QPixmap *>(pdev)->pixmapData();
-        Q_ASSERT(data->classId() == QPixmapData::OpenGLClass);
-        pixmapData = static_cast<QGLPixmapData *>(data);
-
-        fbo = pixmapData->fbo();
-    }
-#else
-    Q_ASSERT(pdev->devType() != QInternal::Pixmap);
-#endif
-
-    if (pdev->devType() == QInternal::Widget)
-        widget = static_cast<QGLWidget *>(pdev);
-    else if (pdev->devType() == QInternal::Pbuffer)
-        buffer = static_cast<QGLPixelBuffer *>(pdev);
-    else if (pdev->devType() == QInternal::FramebufferObject)
-        fbo = static_cast<QGLFramebufferObject *>(pdev);
-#ifdef Q_WS_QWS
-    else if (pdev->devType() == QInternal::UnknownDevice)
-        wsurf = static_cast<QWSGLPaintDevice*>(pdev)->windowSurface();
-#elif !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    else if (pdev->devType() == QInternal::UnknownDevice)
-        wsurf = static_cast<QGLWindowSurface *>(pdev);
-#endif
-}
-
-void QGLDrawable::swapBuffers()
-{
-    if (widget) {
-        if (widget->autoBufferSwap())
-            widget->swapBuffers();
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    } else if (pixmapData) {
-        pixmapData->swapBuffers();
-#endif
-    } else {
-        glFlush();
-    }
-}
-
-void QGLDrawable::makeCurrent()
-{
-    previous_fbo = 0;
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    if (!pixmapData && !fbo) {
-#else
-    if (!fbo) {
-#endif
-        QGLContext *ctx = context();
-        previous_fbo = ctx->d_ptr->current_fbo;
-        ctx->d_ptr->current_fbo = 0;
-        if (previous_fbo)
-            glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
-    }
-
-    if (widget)
-        widget->makeCurrent();
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    else if (pixmapData)
-        pixmapData->makeCurrent();
-#endif
-    else if (buffer)
-        buffer->makeCurrent();
-#if defined(Q_WS_QWS) || (!defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL))
-    else if (wsurf)
-        wsurf->context()->makeCurrent();
-#endif
-    else if (fbo) {
-        wasBound = fbo->isBound();
-        if (!wasBound)
-            fbo->bind();
-    }
-}
-
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-QGLPixmapData *QGLDrawable::copyOnBegin() const
-{
-    if (!pixmapData || pixmapData->isUninitialized())
-        return 0;
-    return pixmapData;
-}
-#endif
-
-void QGLDrawable::doneCurrent()
-{
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    if (pixmapData) {
-        pixmapData->doneCurrent();
-        return;
-    }
-#endif
-
-    if (previous_fbo) {
-        QGLContext *ctx = context();
-        ctx->d_ptr->current_fbo = previous_fbo;
-        glBindFramebuffer(GL_FRAMEBUFFER_EXT, previous_fbo);
-    }
-
-    if (fbo && !wasBound)
-        fbo->release();
-}
-
-QSize QGLDrawable::size() const
-{
-    if (widget) {
-        return QSize(widget->d_func()->glcx->device()->width(),
-                     widget->d_func()->glcx->device()->height());
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    } else if (pixmapData) {
-        return pixmapData->size();
-#endif
-    } else if (buffer) {
-        return buffer->size();
-    } else if (fbo) {
-        return fbo->size();
-    }
-#ifdef Q_WS_QWS
-    else if (wsurf)
-        return wsurf->window()->frameSize();
-#elif !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    else if (wsurf)
-        return QSize(wsurf->width(), wsurf->height());
-#endif
-    return QSize();
-}
-
-QGLFormat QGLDrawable::format() const
-{
-    if (widget)
-        return widget->format();
-    else if (buffer)
-        return buffer->format();
-#if defined(Q_WS_QWS) || (!defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL))
-    else if (wsurf)
-        return wsurf->context()->format();
-#endif
-    else if (fbo && QGLContext::currentContext()) {
-        QGLFormat fmt = QGLContext::currentContext()->format();
-        fmt.setStencil(fbo->attachment() == QGLFramebufferObject::CombinedDepthStencil);
-        fmt.setDepth(fbo->attachment() != QGLFramebufferObject::NoAttachment);
-        return fmt;
-    }
-
-    return QGLFormat();
-}
-
-GLuint QGLDrawable::bindTexture(const QImage &image, GLenum target, GLint format,
-                                QGLContext::BindOptions options)
-{
-    QGLTexture *texture = 0;
-    options |= QGLContext::MemoryManagedBindOption;
-    if (widget)
-        texture = widget->d_func()->glcx->d_func()->bindTexture(image, target, format, options);
-    else if (buffer)
-        texture = buffer->d_func()->qctx->d_func()->bindTexture(image, target, format, options);
-    else if (fbo && QGLContext::currentContext())
-        texture = const_cast<QGLContext *>(QGLContext::currentContext())->d_func()->bindTexture(image, target, format, options);
-#if defined(Q_WS_QWS) || (!defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL))
-    else if (wsurf)
-        texture = wsurf->context()->d_func()->bindTexture(image, target, format, options);
-#endif
-    return texture->id;
-}
-
-GLuint QGLDrawable::bindTexture(const QPixmap &pixmap, GLenum target, GLint format,
-                                QGLContext::BindOptions options)
-{
-    QGLTexture *texture = 0;
-    if (widget)
-        texture = widget->d_func()->glcx->d_func()->bindTexture(pixmap, target, format, options);
-    else if (buffer)
-        texture = buffer->d_func()->qctx->d_func()->bindTexture(pixmap, target, format, options);
-    else if (fbo && QGLContext::currentContext())
-        texture = const_cast<QGLContext *>(QGLContext::currentContext())->d_func()->bindTexture(pixmap, target, format, options);
-#if defined(Q_WS_QWS) || (!defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL))
-    else if (wsurf)
-        texture = wsurf->context()->d_func()->bindTexture(pixmap, target, format, options);
-#endif
-    return texture->id;
-}
-
-QColor QGLDrawable::backgroundColor() const
-{
-    if (widget)
-        return widget->palette().brush(widget->backgroundRole()).color();
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    else if (pixmapData)
-        return pixmapData->fillColor();
-#endif
-    return QApplication::palette().brush(QPalette::Background).color();
-}
-
-bool QGLDrawable::hasTransparentBackground() const
-{
-    return widget && widget->testAttribute(Qt::WA_TranslucentBackground);
-}
-
-QGLContext *QGLDrawable::context() const
-{
-    if (widget)
-        return widget->d_func()->glcx;
-    else if (buffer)
-        return buffer->d_func()->qctx;
-    else if (fbo)
-        return const_cast<QGLContext *>(QGLContext::currentContext());
-#if defined(Q_WS_QWS) || (!defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL))
-    else if (wsurf)
-        return wsurf->context();
-#endif
-    return 0;
-}
-
-bool QGLDrawable::autoFillBackground() const
-{
-    if (widget)
-        return widget->autoFillBackground();
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    else if (pixmapData)
-        return pixmapData->needsFill();
-#endif
-    else
-        return false;
-}
-#endif
-
 bool QGLShareRegister::checkSharing(const QGLContext *context1, const QGLContext *context2) {
     bool sharing = (context1 && context2 && context1->d_ptr->group == context2->d_ptr->group);
     return sharing;
diff --git a/src/opengl/qgl.h b/src/opengl/qgl.h
index ce50c58..151c7c4 100644
--- a/src/opengl/qgl.h
+++ b/src/opengl/qgl.h
@@ -385,7 +385,6 @@ private:
     friend class QGLPixelBuffer;
     friend class QGLPixelBufferPrivate;
     friend class QGLWidget;
-//    friend class QGLDrawable;
     friend class QGLWidgetPrivate;
     friend class QGLGlyphCache;
     friend class QOpenGLPaintEngine;
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index e86b843..b10d5da 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -191,7 +191,7 @@ public:
     bool renderCxPm(QPixmap *pixmap);
     void cleanupColormaps();
 
-    QGLContext *glcx; // ### Keep for compatability with QGLDrawable (if that gets left in)
+    QGLContext *glcx;
     QGLWidgetGLPaintDevice glDevice;
     bool autoSwap;
 
@@ -341,60 +341,6 @@ Q_SIGNALS:
     void aboutToDestroyContext(const QGLContext *context);
 };
 
-#if 0
-class QGLPixelBuffer;
-class QGLFramebufferObject;
-class QWSGLWindowSurface;
-class QGLWindowSurface;
-class QGLPixmapData;
-class QGLDrawable {
-public:
-    QGLDrawable() : widget(0), buffer(0), fbo(0)
-#if defined(Q_WS_QWS) || (!defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL))
-                  , wsurf(0)
-#endif
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-                  , pixmapData(0)
-#endif
-        {}
-    void setDevice(QPaintDevice *pdev);
-    void swapBuffers();
-    void makeCurrent();
-    void doneCurrent();
-    QSize size() const;
-    QGLFormat format() const;
-    GLuint bindTexture(const QImage &image, GLenum target = GL_TEXTURE_2D, GLint format = GL_RGBA,
-                       QGLContext::BindOptions = QGLContext::InternalBindOption);
-    GLuint bindTexture(const QPixmap &pixmap, GLenum target = GL_TEXTURE_2D, GLint format = GL_RGBA,
-                       QGLContext::BindOptions = QGLContext::InternalBindOption);
-    QColor backgroundColor() const;
-    QGLContext *context() const;
-    bool autoFillBackground() const;
-    bool hasTransparentBackground() const;
-
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    QGLPixmapData *copyOnBegin() const;
-#endif
-
-private:
-    bool wasBound;
-    QGLWidget *widget;
-    QGLPixelBuffer *buffer;
-    QGLFramebufferObject *fbo;
-#ifdef Q_WS_QWS
-    QWSGLWindowSurface *wsurf;
-#elif !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    QGLWindowSurface *wsurf;
-#endif
-
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    QGLPixmapData *pixmapData;
-#endif
-    int previous_fbo;
-};
-
-#endif
-
 // GL extension definitions
 class QGLExtensions {
 public:
diff --git a/src/opengl/qgl_x11.cpp b/src/opengl/qgl_x11.cpp
index fc29264..a7376b2 100644
--- a/src/opengl/qgl_x11.cpp
+++ b/src/opengl/qgl_x11.cpp
@@ -41,7 +41,6 @@
 
 #include "qgl.h"
 #include "qgl_p.h"
-#include "qglpaintdevice_p.h"
 
 #include "qmap.h"
 #include "qapplication.h"
@@ -1308,7 +1307,6 @@ void QGLWidget::setContext(QGLContext *context,
         d->glcx->doneCurrent();
     QGLContext* oldcx = d->glcx;
     d->glcx = context;
-//    d->glDevice.setContext(context); // ### Do this for all platforms
 
     if (parentWidget()) {
         // force creation of delay-created widgets
diff --git a/src/opengl/qglframebufferobject.h b/src/opengl/qglframebufferobject.h
index 29b1f97..6efbb73 100644
--- a/src/opengl/qglframebufferobject.h
+++ b/src/opengl/qglframebufferobject.h
@@ -130,7 +130,6 @@ protected:
 private:
     Q_DISABLE_COPY(QGLFramebufferObject)
     QScopedPointer<QGLFramebufferObjectPrivate> d_ptr;
-//    friend class QGLDrawable;
     friend class QGLPaintDevice;
     friend class QGLFBOGLPaintDevice;
 };
diff --git a/src/opengl/qglpaintdevice.cpp b/src/opengl/qglpaintdevice.cpp
index 15ea217..a89b884 100644
--- a/src/opengl/qglpaintdevice.cpp
+++ b/src/opengl/qglpaintdevice.cpp
@@ -9,8 +9,8 @@
 ** 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.
+** contained in the Technology Preview License Agreement accompanying
+** this package.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
@@ -21,20 +21,20 @@
 ** 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
+** additional rights.  These rights are described in the Nokia 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.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at http://qt.nokia.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
@@ -46,6 +46,8 @@
 #include <private/qwindowsurface_gl_p.h>
 #include <private/qpixmapdata_gl_p.h>
 
+QT_BEGIN_NAMESPACE
+
 QGLPaintDevice::QGLPaintDevice()
     : m_thisFBO(0)
 {
@@ -94,33 +96,16 @@ void QGLPaintDevice::endPaint()
     }
 }
 
-//QColor QGLPaintDevice::backgroundColor() const
-//{
-//    return QApplication::palette().brush(QPalette::Background).color();
-//}
-
-//bool QGLPaintDevice::autoFillBackground() const
-//{
-//    return false;
-//}
-
-//bool QGLPaintDevice::hasTransparentBackground() const
-//{
-//    return false;
-//}
-
 QGLFormat QGLPaintDevice::format() const
 {
     return context()->format();
 }
 
-//QSize QGLPaintDevice::size() const
-//{
-//    return QSize();
-//}
 
 
 
+////////////////// QGLWidgetGLPaintDevice //////////////////
+
 QGLWidgetGLPaintDevice::QGLWidgetGLPaintDevice()
 {
 }
@@ -130,21 +115,6 @@ QPaintEngine* QGLWidgetGLPaintDevice::paintEngine() const
     return glWidget->paintEngine();
 }
 
-//QColor QGLWidgetGLPaintDevice::backgroundColor() const
-//{
-//    return glWidget->palette().brush(glWidget->backgroundRole()).color();
-//}
-
-//bool QGLWidgetGLPaintDevice::autoFillBackground() const
-//{
-//    return glWidget->autoFillBackground();
-//}
-
-//bool QGLWidgetGLPaintDevice::hasTransparentBackground() const
-//{
-//    return glWidget->testAttribute(Qt::WA_TranslucentBackground);
-//}
-
 void QGLWidgetGLPaintDevice::setWidget(QGLWidget* w)
 {
     glWidget = w;
@@ -214,4 +184,4 @@ QGLPaintDevice* QGLPaintDevice::getDevice(QPaintDevice* pd)
     return glpd;
 }
 
-
+QT_END_NAMESPACE
diff --git a/src/opengl/qglpaintdevice_p.h b/src/opengl/qglpaintdevice_p.h
index a175b8c..32a1275 100644
--- a/src/opengl/qglpaintdevice_p.h
+++ b/src/opengl/qglpaintdevice_p.h
@@ -9,8 +9,8 @@
 ** 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.
+** contained in the Technology Preview License Agreement accompanying
+** this package.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
@@ -21,20 +21,20 @@
 ** 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
+** additional rights.  These rights are described in the Nokia 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.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at http://qt.nokia.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
@@ -53,9 +53,13 @@
 // We mean it.
 //
 
+
 #include <qpaintdevice.h>
 #include <qgl.h>
 
+
+QT_BEGIN_NAMESPACE
+
 class QGLPaintDevice : public QPaintDevice
 {
 public:
@@ -68,12 +72,6 @@ public:
     virtual void ensureActiveTarget();
     virtual void endPaint();
 
-//    virtual void clearOnBegin() const;
-//    virtual QColor clearColor() const;
-//    virtual QColor backgroundColor() const;
-//    virtual bool autoFillBackground() const;
-//    virtual bool hasTransparentBackground() const;
-
     virtual QGLContext* context() const = 0;
     QGLFormat format() const;
     virtual QSize size() const = 0;
@@ -82,12 +80,8 @@ public:
     static QGLPaintDevice* getDevice(QPaintDevice*);
 
 protected:
-    // Inline?
-//    void setContext(QGLContext* c);
     GLuint m_previousFBO;
     GLuint m_thisFBO;
-private:
-//    QGLContext* m_context;
 };
 
 
@@ -100,11 +94,6 @@ public:
 
     virtual QPaintEngine* paintEngine() const;
 
-//    virtual void clearOnBegin() const;
-//    virtual QColor clearColor() const;
-//    virtual bool autoFillBackground() const;
-//    virtual bool hasTransparentBackground() const;
-
     // QGLWidgets need to do swapBufers in endPaint:
     virtual void beginPaint();
     virtual void endPaint();
@@ -118,59 +107,6 @@ private:
     QGLWidget *glWidget;
 };
 
-
-
-/*
-Replaces:
-
-class QGLPixelBuffer;
-class QGLFramebufferObject;
-class QWSGLWindowSurface;
-class QGLWindowSurface;
-class QGLPixmapData;
-class QGLDrawable {
-public:
-    QGLDrawable() : widget(0), buffer(0), fbo(0)
-#if defined(Q_WS_QWS) || (!defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL))
-                  , wsurf(0)
-#endif
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-                  , pixmapData(0)
-#endif
-        {}
-    void setDevice(QPaintDevice *pdev);
-    void swapBuffers();
-    void makeCurrent();
-    void doneCurrent();
-    QSize size() const;
-    QGLFormat format() const;
-    GLuint bindTexture(const QImage &image, GLenum target = GL_TEXTURE_2D, GLint format = GL_RGBA);
-    GLuint bindTexture(const QPixmap &pixmap, GLenum target = GL_TEXTURE_2D, GLint format = GL_RGBA);
-    QColor backgroundColor() const;
-    QGLContext *context() const;
-    bool autoFillBackground() const;
-    bool hasTransparentBackground() const;
-
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    QGLPixmapData *copyOnBegin() const;
-#endif
-
-private:
-    bool wasBound;
-    QGLWidget *widget;
-    QGLPixelBuffer *buffer;
-    QGLFramebufferObject *fbo;
-#ifdef Q_WS_QWS
-    QWSGLWindowSurface *wsurf;
-#elif !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    QGLWindowSurface *wsurf;
-#endif
-
-#if !defined(QT_OPENGL_ES_1) && !defined(QT_OPENGL_ES_1_CL)
-    QGLPixmapData *pixmapData;
-#endif
-    int previous_fbo;
-};
-*/
+QT_END_NAMESPACE
 
 #endif // QGLPAINTDEVICE_P_H
diff --git a/src/opengl/qglpixelbuffer.cpp b/src/opengl/qglpixelbuffer.cpp
index 45ab3bc..b6a919c 100644
--- a/src/opengl/qglpixelbuffer.cpp
+++ b/src/opengl/qglpixelbuffer.cpp
@@ -114,7 +114,6 @@ void QGLPBufferGLPaintDevice::endPaint() {
 void QGLPBufferGLPaintDevice::setPBuffer(QGLPixelBuffer* pb)
 {
     pbuf = pb;
-//    setContext(pb->d_func()->qctx);
 }
 
 void QGLPixelBufferPrivate::common_init(const QSize &size, const QGLFormat &format, QGLWidget *shareWidget)
diff --git a/src/opengl/qpaintengine_opengl.cpp b/src/opengl/qpaintengine_opengl.cpp
index 36a0081..34fff10 100644
--- a/src/opengl/qpaintengine_opengl.cpp
+++ b/src/opengl/qpaintengine_opengl.cpp
@@ -287,7 +287,6 @@ public Q_SLOTS:
     }
 
 private:
-//    QGLDrawable drawable;
     QGLPaintDevice* device;
 
     QGLFramebufferObject *offscreen;
@@ -436,7 +435,7 @@ inline void QGLOffscreen::release()
     DEBUG_ONCE_STR("QGLOffscreen: releasing offscreen");
 
     if (drawable_fbo)
-        device->context()->makeCurrent(); //###
+        device->ensureActiveTarget(); //###
     else
         offscreen->release();
 
@@ -765,7 +764,6 @@ public:
     GLubyte pen_color[4];
     GLubyte brush_color[4];
     QTransform::TransformationType txop;
-//    QGLDrawable drawable;
     QGLPaintDevice* device;
     QGLOffscreen offscreen;