Qt 4.8: glextensions.cpp Example File (demos/boxes/glextensions.cpp)

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# glextensions.cpp Example File

demos/boxes/glextensions.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** 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 http://www.qt.io/terms-conditions. For further
     ** information use the contact form at http://www.qt.io/contact-us.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 or version 3 as published by the Free
     ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
     ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
     ** following information to ensure the GNU Lesser General Public License
     ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
     ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
     ** As a special exception, The Qt Company gives you certain additional
     ** rights. These rights are described in The Qt Company LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU General Public License version 3.0 requirements will be
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     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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