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Diffstat (limited to 'examples/widgets/graphicsview/boxes/main.cpp')
-rw-r--r-- | examples/widgets/graphicsview/boxes/main.cpp | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/examples/widgets/graphicsview/boxes/main.cpp b/examples/widgets/graphicsview/boxes/main.cpp deleted file mode 100644 index 2b3e6d3389..0000000000 --- a/examples/widgets/graphicsview/boxes/main.cpp +++ /dev/null @@ -1,157 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the demonstration applications of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, 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 "glextensions.h" -#include "scene.h" - -#include <QGLWidget> -#include <QtWidgets> - -class GraphicsView : public QGraphicsView -{ -public: - GraphicsView() - { - setWindowTitle(tr("Boxes")); - setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform); - //setRenderHints(QPainter::SmoothPixmapTransform); - } - -protected: - void resizeEvent(QResizeEvent *event) override { - if (scene()) - scene()->setSceneRect(QRect(QPoint(0, 0), event->size())); - QGraphicsView::resizeEvent(event); - } -}; - -inline bool matchString(const char *extensionString, const char *subString) -{ - int subStringLength = strlen(subString); - return (strncmp(extensionString, subString, subStringLength) == 0) - && ((extensionString[subStringLength] == ' ') || (extensionString[subStringLength] == '\0')); -} - -bool necessaryExtensionsSupported() -{ - const char *extensionString = reinterpret_cast<const char *>(glGetString(GL_EXTENSIONS)); - const char *p = extensionString; - - const int GL_EXT_FBO = 1; - const int GL_ARB_VS = 2; - const int GL_ARB_FS = 4; - const int GL_ARB_SO = 8; - int extensions = 0; - - while (*p) { - if (matchString(p, "GL_EXT_framebuffer_object")) - extensions |= GL_EXT_FBO; - else if (matchString(p, "GL_ARB_vertex_shader")) - extensions |= GL_ARB_VS; - else if (matchString(p, "GL_ARB_fragment_shader")) - extensions |= GL_ARB_FS; - else if (matchString(p, "GL_ARB_shader_objects")) - extensions |= GL_ARB_SO; - while ((*p != ' ') && (*p != '\0')) - ++p; - if (*p == ' ') - ++p; - } - return (extensions == 15); -} - -int main(int argc, char **argv) -{ - QApplication app(argc, argv); - - if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_1_5) == 0) { - QMessageBox::critical(nullptr, "OpenGL features missing", - "OpenGL version 1.5 or higher is required to run this demo.\n" - "The program will now exit."); - return -1; - } - - int maxTextureSize = 1024; - QGLWidget *widget = new QGLWidget(QGLFormat(QGL::SampleBuffers)); - widget->makeCurrent(); - - if (!necessaryExtensionsSupported()) { - QMessageBox::critical(nullptr, "OpenGL features missing", - "The OpenGL extensions required to run this demo are missing.\n" - "The program will now exit."); - delete widget; - return -2; - } - - // Check if all the necessary functions are resolved. - if (!getGLExtensionFunctions().resolve(widget->context())) { - QMessageBox::critical(nullptr, "OpenGL features missing", - "Failed to resolve OpenGL functions required to run this demo.\n" - "The program will now exit."); - delete widget; - return -3; - } - - // TODO: Make conditional for final release - QMessageBox::information(nullptr, "For your information", - "This demo can be GPU and CPU intensive and may\n" - "work poorly or not at all on your system."); - - widget->makeCurrent(); // The current context must be set before calling Scene's constructor - Scene scene(1024, 768, maxTextureSize); - GraphicsView view; - view.setViewport(widget); - view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate); - view.setScene(&scene); - view.show(); - - return app.exec(); -} - |