b46ffbca0c
The glColorMask call was troublesome. In addition, the Qt::WA_TranslucentBackground was misinterpreted and recommended misleadingly in the documentation. The hellogl2 example's --transparent argument was disfunctional in practice. Replace glColorMask with glBlendFuncSeparate. The hellogl2 example and the docs are now corrected wrt enabling semi-transparency in a QOpenGLWidget that is not a top-level (which is the most common case). Task-number: QTBUG-47276 Change-Id: I6f40e732d455f5efcf158649ac9a52ff9f240e85 Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com> Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
76 lines
3.1 KiB
C++
76 lines
3.1 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QApplication>
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#include <QDesktopWidget>
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#include <QSurfaceFormat>
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#include "mainwindow.h"
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int main(int argc, char *argv[])
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{
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QApplication app(argc, argv);
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QSurfaceFormat fmt;
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fmt.setDepthBufferSize(24);
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if (QCoreApplication::arguments().contains(QStringLiteral("--multisample")))
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fmt.setSamples(4);
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if (QCoreApplication::arguments().contains(QStringLiteral("--coreprofile"))) {
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fmt.setVersion(3, 2);
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fmt.setProfile(QSurfaceFormat::CoreProfile);
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}
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QSurfaceFormat::setDefaultFormat(fmt);
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MainWindow mainWindow;
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if (QCoreApplication::arguments().contains(QStringLiteral("--transparent"))) {
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mainWindow.setAttribute(Qt::WA_TranslucentBackground);
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mainWindow.setAttribute(Qt::WA_NoSystemBackground, false);
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}
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mainWindow.resize(mainWindow.sizeHint());
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int desktopArea = QApplication::desktop()->width() *
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QApplication::desktop()->height();
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int widgetArea = mainWindow.width() * mainWindow.height();
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if (((float)widgetArea / (float)desktopArea) < 0.75f)
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mainWindow.show();
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else
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mainWindow.showMaximized();
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return app.exec();
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}
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