Qt Reference Documentation

# glextensions.cpp Example File

demos/boxes/glextensions.cpp

     /****************************************************************************
     **
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     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** GNU Lesser General Public License Usage
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     ** 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:
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     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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     #include "glextensions.h"

     #define RESOLVE_GL_FUNC(f) ok &= bool((f = (_gl##f) context->getProcAddress(QLatin1String("gl" #f))));

     bool GLExtensionFunctions::resolve(const QGLContext *context)
     {
             bool ok = true;

             RESOLVE_GL_FUNC(GenFramebuffersEXT)
             RESOLVE_GL_FUNC(GenRenderbuffersEXT)
             RESOLVE_GL_FUNC(BindRenderbufferEXT)
             RESOLVE_GL_FUNC(RenderbufferStorageEXT)
             RESOLVE_GL_FUNC(DeleteFramebuffersEXT)
             RESOLVE_GL_FUNC(DeleteRenderbuffersEXT)
             RESOLVE_GL_FUNC(BindFramebufferEXT)
             RESOLVE_GL_FUNC(FramebufferTexture2DEXT)
             RESOLVE_GL_FUNC(FramebufferRenderbufferEXT)
             RESOLVE_GL_FUNC(CheckFramebufferStatusEXT)

             RESOLVE_GL_FUNC(ActiveTexture)
             RESOLVE_GL_FUNC(TexImage3D)

             RESOLVE_GL_FUNC(GenBuffers)
             RESOLVE_GL_FUNC(BindBuffer)
             RESOLVE_GL_FUNC(BufferData)
             RESOLVE_GL_FUNC(DeleteBuffers)
             RESOLVE_GL_FUNC(MapBuffer)
             RESOLVE_GL_FUNC(UnmapBuffer)

             return ok;
     }

     bool GLExtensionFunctions::fboSupported() {
         return GenFramebuffersEXT
                 && GenRenderbuffersEXT
                 && BindRenderbufferEXT
                 && RenderbufferStorageEXT
                 && DeleteFramebuffersEXT
                 && DeleteRenderbuffersEXT
                 && BindFramebufferEXT
                 && FramebufferTexture2DEXT
                 && FramebufferRenderbufferEXT
                 && CheckFramebufferStatusEXT;
     }

     bool GLExtensionFunctions::openGL15Supported() {
         return ActiveTexture
                 && TexImage3D
                 && GenBuffers
                 && BindBuffer
                 && BufferData
                 && DeleteBuffers
                 && MapBuffer
                 && UnmapBuffer;
     }

     #undef RESOLVE_GL_FUNC