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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QGuiApplication>
#include <QSurfaceFormat>
#include <QOffscreenSurface>
#include <QOpenGLContext>
#include <QDebug>
#include <QPair>
#include "glwindow.h"
bool OGLSupports(int major, int minor, bool gles = false)
{
QOpenGLContext ctx;
QSurfaceFormat fmt;
fmt.setVersion(major, minor);
if (gles)
fmt.setRenderableType(QSurfaceFormat::OpenGLES);
else
fmt.setRenderableType(QSurfaceFormat::OpenGL);
ctx.setFormat(fmt);
ctx.create();
if (!ctx.isValid())
return false;
int ctxMajor = ctx.format().majorVersion();
int ctxMinor = ctx.format().minorVersion();
bool isGles = (ctx.format().renderableType() == QSurfaceFormat::OpenGLES);
if (isGles != gles) return false;
if (ctxMajor < major) return false;
if (ctxMajor == major && ctxMinor < minor)
return false;
return true;
}
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
qDebug() << "Support for GL 2.0 "<<( OGLSupports(2,0) ? "yes" : "no");
qDebug() << "Support for GL 2.1 "<<( OGLSupports(2,1) ? "yes" : "no");
qDebug() << "Support for GL 3.0 "<<( OGLSupports(3,0) ? "yes" : "no");
qDebug() << "Support for GL 3.1 "<<( OGLSupports(3,1) ? "yes" : "no");
qDebug() << "Support for GL 3.2 "<<( OGLSupports(3,2) ? "yes" : "no");
qDebug() << "Support for GL 3.3 "<<( OGLSupports(3,3) ? "yes" : "no");
qDebug() << "Support for GL 4.0 "<<( OGLSupports(4,0) ? "yes" : "no");
qDebug() << "Support for GL 4.1 "<<( OGLSupports(4,1) ? "yes" : "no");
qDebug() << "Support for GL 4.2 "<<( OGLSupports(4,2) ? "yes" : "no");
qDebug() << "Support for GL 4.3 "<<( OGLSupports(4,3) ? "yes" : "no");
qDebug() << "Support for GL 4.4 "<<( OGLSupports(4,4) ? "yes" : "no");
qDebug() << "Support for GL 4.5 "<<( OGLSupports(4,5) ? "yes" : "no");
qDebug() << "Support for GLES 2.0 "<<( OGLSupports(2,0,true) ? "yes" : "no");
qDebug() << "Support for GLES 3.0 "<<( OGLSupports(3,0,true) ? "yes" : "no");
qDebug() << "Support for GLES 3.1 "<<( OGLSupports(3,1,true) ? "yes" : "no");
qDebug() << "Support for GLES 3.2 "<<( OGLSupports(3,2,true) ? "yes" : "no");
QSurfaceFormat fmt;
fmt.setDepthBufferSize(24);
// Request OpenGL 4.3 compatibility or OpenGL ES 3.1.
if (OGLSupports(4,3)) {
qDebug("Requesting 4.3 compatibility context");
fmt.setVersion(4, 3);
fmt.setRenderableType(QSurfaceFormat::OpenGL);
fmt.setProfile(QSurfaceFormat::CompatibilityProfile);
} else if (OGLSupports(3,1,true)) {
qDebug("Requesting 3.1 GLES context");
fmt.setVersion(3, 1);
fmt.setRenderableType(QSurfaceFormat::OpenGLES);
} else {
qWarning("Error: This system does not support OpenGL Compute Shaders! Exiting.");
return -1;
}
QSurfaceFormat::setDefaultFormat(fmt);
GLWindow glWindow;
glWindow.showMaximized();
return app.exec();
}
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