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/*
Copyright (C) 2015 The Qt Company Ltd
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "QFramebufferPaintDevice.h"
#include <QOpenGLFunctions>
QFramebufferPaintDevice::QFramebufferPaintDevice(const QSize& size,
QOpenGLFramebufferObject::Attachment attachment,
bool clearOnInit)
: QOpenGLPaintDevice(size)
, m_framebufferObject(size, attachment)
{
m_surface = QOpenGLContext::currentContext()->surface();
#if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
setPaintFlipped(true);
#endif
if (clearOnInit) {
m_framebufferObject.bind();
context()->functions()->glClearColor(0, 0, 0, 0);
context()->functions()->glClear(GL_COLOR_BUFFER_BIT);
}
}
void QFramebufferPaintDevice::ensureActiveTarget()
{
if (QOpenGLContext::currentContext() != context())
context()->makeCurrent(m_surface);
m_framebufferObject.bind();
}
QImage QFramebufferPaintDevice::toImage() const
{
QOpenGLContext* currentContext = QOpenGLContext::currentContext();
QSurface* currentSurface = currentContext ? currentContext->surface() : 0;
context()->makeCurrent(m_surface);
#if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
QImage image = m_framebufferObject.toImage(false);
#else
QImage image = m_framebufferObject.toImage();
#endif
if (currentContext)
currentContext->makeCurrent(currentSurface);
else
context()->doneCurrent();
return image;
}
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