From 6e28e8441b698c3397c2c78125c877f2e9867cb1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Samuel=20R=C3=B8dal?= Date: Mon, 22 Aug 2011 10:49:28 +0200 Subject: Copy core GL functionality to QtGui with QGL -> QOpenGL naming. Change-Id: Ibc989afa4a30dd184d41d1a1cd89f97196e48855 Reviewed-on: http://codereview.qt.nokia.com/3710 Reviewed-by: Gunnar Sletta --- src/gui/opengl/qopenglpaintdevice.cpp | 153 ++++++++++++++++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 src/gui/opengl/qopenglpaintdevice.cpp (limited to 'src/gui/opengl/qopenglpaintdevice.cpp') diff --git a/src/gui/opengl/qopenglpaintdevice.cpp b/src/gui/opengl/qopenglpaintdevice.cpp new file mode 100644 index 0000000000..e3ff5ae1f9 --- /dev/null +++ b/src/gui/opengl/qopenglpaintdevice.cpp @@ -0,0 +1,153 @@ +/**************************************************************************** +** +** 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 QtGui 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 +** 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. +** +** 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. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include +#include +#include + +#include + +QT_BEGIN_NAMESPACE + +QOpenGLPaintDevice::QOpenGLPaintDevice() + : m_thisFBO(0) +{ +} + +QOpenGLPaintDevice::~QOpenGLPaintDevice() +{ +} + +int QOpenGLPaintDevice::metric(QPaintDevice::PaintDeviceMetric metric) const +{ + switch(metric) { + case PdmWidth: + return size().width(); + case PdmHeight: + return size().height(); + case PdmDepth: { + const QSurfaceFormat f = format(); + return f.redBufferSize() + f.greenBufferSize() + f.blueBufferSize() + f.alphaBufferSize(); + } + default: + qWarning("QOpenGLPaintDevice::metric() - metric %d not known", metric); + return 0; + } +} + +void QOpenGLPaintDevice::beginPaint() +{ + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + + // 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_func()->current_fbo = m_thisFBO; + QOpenGLFunctions(ctx).glBindFramebuffer(GL_FRAMEBUFFER, m_thisFBO); + } + + // Set the default fbo for the context to m_thisFBO so that + // if some raw GL code between beginNativePainting() and + // endNativePainting() calls QOpenGLFramebufferObject::release(), + // painting will revert to the window surface's fbo. + ctx->d_func()->default_fbo = m_thisFBO; +} + +void QOpenGLPaintDevice::ensureActiveTarget() +{ + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + + if (ctx->d_func()->current_fbo != m_thisFBO) { + ctx->d_func()->current_fbo = m_thisFBO; + QOpenGLFunctions(ctx).glBindFramebuffer(GL_FRAMEBUFFER, m_thisFBO); + } + + ctx->d_func()->default_fbo = m_thisFBO; +} + +void QOpenGLPaintDevice::endPaint() +{ + // Make sure the FBO bound at beginPaint is re-bound again here: + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + + if (m_previousFBO != ctx->d_func()->current_fbo) { + ctx->d_func()->current_fbo = m_previousFBO; + QOpenGLFunctions(ctx).glBindFramebuffer(GL_FRAMEBUFFER, m_previousFBO); + } + + ctx->d_func()->default_fbo = 0; +} + +bool QOpenGLPaintDevice::isFlipped() const +{ + return false; +} + +// returns the QOpenGLPaintDevice for the given QPaintDevice +QOpenGLPaintDevice* QOpenGLPaintDevice::getDevice(QPaintDevice* pd) +{ + QOpenGLPaintDevice* glpd = 0; + + switch(pd->devType()) { + case QInternal::FramebufferObject: + glpd = &(static_cast(pd)->d_func()->glDevice); + break; + case QInternal::Pixmap: { + qWarning("Pixmap type not supported for GL rendering"); + break; + } + default: + qWarning("QOpenGLPaintDevice::getDevice() - Unknown device type %d", pd->devType()); + break; + } + + return glpd; +} + +QT_END_NAMESPACE -- cgit v1.2.3