/**************************************************************************** | |
** | |
** 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. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** 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 | |
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** file. Please review the following information to ensure the GNU Lesser | |
** General Public License version 2.1 requirements will be met: | |
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** | |
** 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. | |
** | |
** 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. | |
** | |
** Other Usage | |
** Alternatively, this file may be used in accordance with the terms and | |
** conditions contained in a signed written agreement between you and Nokia. | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#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 |