629d6eda5c
Replace Nokia contact email address with Qt Project website. Change-Id: I431bbbf76d7c27d8b502f87947675c116994c415 Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
151 lines
5.0 KiB
C++
151 lines
5.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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//#include <GL/glew.h>
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#include "glextensions.h"
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#include "scene.h"
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#include <QtWidgets>
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#include <QGLWidget>
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class GraphicsView : public QGraphicsView
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{
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public:
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GraphicsView()
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{
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setWindowTitle(tr("Boxes"));
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setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
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//setRenderHints(QPainter::SmoothPixmapTransform);
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}
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protected:
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void resizeEvent(QResizeEvent *event) {
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if (scene())
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scene()->setSceneRect(QRect(QPoint(0, 0), event->size()));
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QGraphicsView::resizeEvent(event);
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}
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};
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inline bool matchString(const char *extensionString, const char *subString)
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{
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int subStringLength = strlen(subString);
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return (strncmp(extensionString, subString, subStringLength) == 0)
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&& ((extensionString[subStringLength] == ' ') || (extensionString[subStringLength] == '\0'));
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}
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bool necessaryExtensionsSupported()
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{
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const char *extensionString = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS));
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const char *p = extensionString;
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const int GL_EXT_FBO = 1;
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const int GL_ARB_VS = 2;
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const int GL_ARB_FS = 4;
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const int GL_ARB_SO = 8;
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int extensions = 0;
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while (*p) {
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if (matchString(p, "GL_EXT_framebuffer_object"))
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extensions |= GL_EXT_FBO;
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else if (matchString(p, "GL_ARB_vertex_shader"))
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extensions |= GL_ARB_VS;
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else if (matchString(p, "GL_ARB_fragment_shader"))
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extensions |= GL_ARB_FS;
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else if (matchString(p, "GL_ARB_shader_objects"))
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extensions |= GL_ARB_SO;
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while ((*p != ' ') && (*p != '\0'))
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++p;
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if (*p == ' ')
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++p;
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}
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return (extensions == 15);
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}
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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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if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_5) == 0) {
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QMessageBox::critical(0, "OpenGL features missing",
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"OpenGL version 1.5 or higher is required to run this demo.\n"
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"The program will now exit.");
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return -1;
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}
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int maxTextureSize = 1024;
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QGLWidget *widget = new QGLWidget(QGLFormat(QGL::SampleBuffers));
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widget->makeCurrent();
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if (!necessaryExtensionsSupported()) {
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QMessageBox::critical(0, "OpenGL features missing",
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"The OpenGL extensions required to run this demo are missing.\n"
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"The program will now exit.");
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delete widget;
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return -2;
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}
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// Check if all the necessary functions are resolved.
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if (!getGLExtensionFunctions().resolve(widget->context())) {
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QMessageBox::critical(0, "OpenGL features missing",
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"Failed to resolve OpenGL functions required to run this demo.\n"
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"The program will now exit.");
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delete widget;
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return -3;
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}
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// TODO: Make conditional for final release
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QMessageBox::information(0, "For your information",
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"This demo can be GPU and CPU intensive and may\n"
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"work poorly or not at all on your system.");
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widget->makeCurrent(); // The current context must be set before calling Scene's constructor
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Scene scene(1024, 768, maxTextureSize);
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GraphicsView view;
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view.setViewport(widget);
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view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
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view.setScene(&scene);
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view.show();
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return app.exec();
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}
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