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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtOpenGL 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 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
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <private/qglpaintdevice_p.h>
+#include <private/qgl_p.h>
+#include <private/qglpixelbuffer_p.h>
+#include <private/qglframebufferobject_p.h>
+#ifdef Q_WS_X11
+#include <private/qpixmapdata_x11gl_p.h>
+#endif
+
+#if !defined(QT_OPENGL_ES_1)
+#include <private/qpixmapdata_gl_p.h>
+#include <private/qwindowsurface_gl_p.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+QGLPaintDevice::QGLPaintDevice()
+ : m_thisFBO(0)
+{
+}
+
+QGLPaintDevice::~QGLPaintDevice()
+{
+}
+
+int QGLPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const
+{
+ switch(metric) {
+ case PdmWidth:
+ return size().width();
+ case PdmHeight:
+ return size().height();
+ case PdmDepth: {
+ const QGLFormat f = format();
+ return f.redBufferSize() + f.greenBufferSize() + f.blueBufferSize() + f.alphaBufferSize();
+ }
+ default:
+ qWarning("QGLPaintDevice::metric() - metric %d not known", metric);
+ return 0;
+ }
+}
+
+void QGLPaintDevice::beginPaint()
+{
+ // Make sure our context is the current one:
+ QGLContext *ctx = context();
+ if (ctx != QGLContext::currentContext())
+ ctx->makeCurrent();
+
+ // Record the currently bound FBO so we can restore it again
+ // in endPaint() and bind this device's FBO
+ //
+ // Note: m_thisFBO could be zero if the paint device is not
+ // backed by an FBO (e.g. window back buffer). But there could
+ // be a previous FBO bound to the context which we need to
+ // explicitly unbind. Otherwise the painting will go into
+ // the previous FBO instead of to the window.
+ m_previousFBO = ctx->d_func()->current_fbo;
+
+ if (m_previousFBO != m_thisFBO) {
+ ctx->d_ptr->current_fbo = m_thisFBO;
+ glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
+ }
+
+ // Set the default fbo for the context to m_thisFBO so that
+ // if some raw GL code between beginNativePainting() and
+ // endNativePainting() calls QGLFramebufferObject::release(),
+ // painting will revert to the window surface's fbo.
+ ctx->d_ptr->default_fbo = m_thisFBO;
+}
+
+void QGLPaintDevice::ensureActiveTarget()
+{
+ QGLContext* ctx = context();
+ if (ctx != QGLContext::currentContext())
+ ctx->makeCurrent();
+
+ if (ctx->d_ptr->current_fbo != m_thisFBO) {
+ ctx->d_ptr->current_fbo = m_thisFBO;
+ glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
+ }
+
+ ctx->d_ptr->default_fbo = m_thisFBO;
+}
+
+void QGLPaintDevice::endPaint()
+{
+ // Make sure the FBO bound at beginPaint is re-bound again here:
+ QGLContext *ctx = context();
+ if (m_previousFBO != ctx->d_func()->current_fbo) {
+ ctx->d_ptr->current_fbo = m_previousFBO;
+ glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_previousFBO);
+ }
+
+ ctx->d_ptr->default_fbo = 0;
+}
+
+QGLFormat QGLPaintDevice::format() const
+{
+ return context()->format();
+}
+
+bool QGLPaintDevice::alphaRequested() const
+{
+ return context()->d_func()->reqFormat.alpha();
+}
+
+bool QGLPaintDevice::isFlipped() const
+{
+ return false;
+}
+
+////////////////// QGLWidgetGLPaintDevice //////////////////
+
+QGLWidgetGLPaintDevice::QGLWidgetGLPaintDevice()
+{
+}
+
+QPaintEngine* QGLWidgetGLPaintDevice::paintEngine() const
+{
+ return glWidget->paintEngine();
+}
+
+void QGLWidgetGLPaintDevice::setWidget(QGLWidget* w)
+{
+ glWidget = w;
+}
+
+void QGLWidgetGLPaintDevice::beginPaint()
+{
+ QGLPaintDevice::beginPaint();
+ if (!glWidget->d_func()->disable_clear_on_painter_begin && glWidget->autoFillBackground()) {
+ if (glWidget->testAttribute(Qt::WA_TranslucentBackground))
+ glClearColor(0.0, 0.0, 0.0, 0.0);
+ else {
+ const QColor &c = glWidget->palette().brush(glWidget->backgroundRole()).color();
+ float alpha = c.alphaF();
+ glClearColor(c.redF() * alpha, c.greenF() * alpha, c.blueF() * alpha, alpha);
+ }
+ if (context()->d_func()->workaround_needsFullClearOnEveryFrame)
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
+ else
+ glClear(GL_COLOR_BUFFER_BIT);
+ }
+}
+
+void QGLWidgetGLPaintDevice::endPaint()
+{
+ if (glWidget->autoBufferSwap())
+ glWidget->swapBuffers();
+ QGLPaintDevice::endPaint();
+}
+
+
+QSize QGLWidgetGLPaintDevice::size() const
+{
+ return glWidget->size();
+}
+
+QGLContext* QGLWidgetGLPaintDevice::context() const
+{
+ return const_cast<QGLContext*>(glWidget->context());
+}
+
+// returns the QGLPaintDevice for the given QPaintDevice
+QGLPaintDevice* QGLPaintDevice::getDevice(QPaintDevice* pd)
+{
+ QGLPaintDevice* glpd = 0;
+
+ switch(pd->devType()) {
+ case QInternal::Widget:
+ // Should not be called on a non-gl widget:
+ Q_ASSERT(qobject_cast<QGLWidget*>(static_cast<QWidget*>(pd)));
+ glpd = &(static_cast<QGLWidget*>(pd)->d_func()->glDevice);
+ break;
+ case QInternal::Pbuffer:
+ glpd = &(static_cast<QGLPixelBuffer*>(pd)->d_func()->glDevice);
+ break;
+ case QInternal::FramebufferObject:
+ glpd = &(static_cast<QGLFramebufferObject*>(pd)->d_func()->glDevice);
+ break;
+ case QInternal::Pixmap: {
+#if !defined(QT_OPENGL_ES_1)
+ QPixmapData* pmd = static_cast<QPixmap*>(pd)->pixmapData();
+ if (pmd->classId() == QPixmapData::OpenGLClass)
+ glpd = static_cast<QGLPixmapData*>(pmd)->glDevice();
+#ifdef Q_WS_X11
+ else if (pmd->classId() == QPixmapData::X11Class)
+ glpd = static_cast<QX11GLPixmapData*>(pmd);
+#endif
+ else
+ qWarning("Pixmap type not supported for GL rendering");
+#else
+ qWarning("Pixmap render targets not supported on OpenGL ES 1.x");
+#endif
+ break;
+ }
+ default:
+ qWarning("QGLPaintDevice::getDevice() - Unknown device type %d", pd->devType());
+ break;
+ }
+
+ return glpd;
+}
+
+QT_END_NAMESPACE