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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();
}
////////////////// 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
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