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Diffstat (limited to 'src/opengl/qglpaintdevice.cpp')
| -rw-r--r-- | src/opengl/qglpaintdevice.cpp | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/opengl/qglpaintdevice.cpp b/src/opengl/qglpaintdevice.cpp new file mode 100644 index 0000000..a89b884 --- /dev/null +++ b/src/opengl/qglpaintdevice.cpp @@ -0,0 +1,187 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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> +#include <private/qwindowsurface_gl_p.h> +#include <private/qpixmapdata_gl_p.h> + +QT_BEGIN_NAMESPACE + +QGLPaintDevice::QGLPaintDevice() + : m_thisFBO(0) +{ +} + +QGLPaintDevice::~QGLPaintDevice() +{ +} + + +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 + 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); + } +} + +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); + } +} + +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); + } +} + +QGLFormat QGLPaintDevice::format() const +{ + return context()->format(); +} + + + + +////////////////// 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); + } + 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: { + QPixmapData* pmd = static_cast<QPixmap*>(pd)->pixmapData(); + Q_ASSERT(pmd->classId() == QPixmapData::OpenGLClass); + glpd = static_cast<QGLPixmapData*>(pmd)->glDevice(); + break; + } + default: + qWarning("QGLPaintDevice::getDevice() - Unknown device type %d", pd->devType()); + break; + } + + return glpd; +} + +QT_END_NAMESPACE |