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/****************************************************************************
**
** 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtOpenGL/qgl.h>
#include "qgl_egl_p.h"
QT_BEGIN_NAMESPACE
// Set device configuration attributes from a QGLFormat instance.
void qt_egl_set_format(QEglProperties& props, int deviceType, const QGLFormat& f)
{
if (deviceType == QInternal::Pixmap || deviceType == QInternal::Image)
props.setValue(EGL_SURFACE_TYPE, EGL_PIXMAP_BIT);
else if (deviceType == QInternal::Pbuffer)
props.setValue(EGL_SURFACE_TYPE, EGL_PBUFFER_BIT);
else
props.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT);
// Set the pixel format to that contained in the QGLFormat
// if the system hasn't already chosen a fixed format to
// match the pixmap, widget, etc.
if (props.value(EGL_RED_SIZE) == 0 || f.redBufferSize() != -1)
props.setValue(EGL_RED_SIZE, f.redBufferSize() == -1 ? 1 : f.redBufferSize());
if (props.value(EGL_GREEN_SIZE) == 0 || f.greenBufferSize() != -1)
props.setValue(EGL_GREEN_SIZE, f.greenBufferSize() == -1 ? 1 : f.greenBufferSize());
if (props.value(EGL_BLUE_SIZE) == 0 || f.blueBufferSize() != -1)
props.setValue(EGL_BLUE_SIZE, f.blueBufferSize() == -1 ? 1 : f.blueBufferSize());
if (f.alpha()) {
if (props.value(EGL_ALPHA_SIZE) == 0 || f.alphaBufferSize() != -1)
props.setValue(EGL_ALPHA_SIZE, f.alphaBufferSize() == -1 ? 1 : f.alphaBufferSize());
}
if (f.depth())
props.setValue(EGL_DEPTH_SIZE, f.depthBufferSize() == -1 ? 1 : f.depthBufferSize());
if (f.stencil())
props.setValue(EGL_STENCIL_SIZE, f.stencilBufferSize() == -1 ? 1 : f.stencilBufferSize());
if (f.sampleBuffers()) {
props.setValue(EGL_SAMPLE_BUFFERS, 1);
props.setValue(EGL_SAMPLES, f.samples());
} else {
props.setValue(EGL_SAMPLE_BUFFERS, 0);
}
if (deviceType == QInternal::Widget)
props.setValue(EGL_LEVEL, f.plane());
}
// Updates "format" with the parameters of the selected configuration.
void qt_egl_update_format(const QEglContext& context, QGLFormat& format)
{
EGLint value = 0;
if (context.configAttrib(EGL_RED_SIZE, &value))
format.setRedBufferSize(value);
if (context.configAttrib(EGL_GREEN_SIZE, &value))
format.setGreenBufferSize(value);
if (context.configAttrib(EGL_BLUE_SIZE, &value))
format.setBlueBufferSize(value);
if (context.configAttrib(EGL_ALPHA_SIZE, &value)) {
format.setAlpha(value != 0);
if (format.alpha())
format.setAlphaBufferSize(value);
}
if (context.configAttrib(EGL_DEPTH_SIZE, &value)) {
format.setDepth(value != 0);
if (format.depth())
format.setDepthBufferSize(value);
}
if (context.configAttrib(EGL_LEVEL, &value))
format.setPlane(value);
if (context.configAttrib(EGL_SAMPLE_BUFFERS, &value)) {
format.setSampleBuffers(value != 0);
if (format.sampleBuffers()) {
context.configAttrib(EGL_SAMPLES, &value);
format.setSamples(value);
}
}
if (context.configAttrib(EGL_STENCIL_SIZE, &value)) {
format.setStencil(value != 0);
if (format.stencil())
format.setStencilBufferSize(value);
}
// Clear the EGL error state because some of the above may
// have errored out because the attribute is not applicable
// to the surface type. Such errors don't matter.
context.clearError();
}
QT_END_NAMESPACE
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