/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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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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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: 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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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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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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+
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#ifndef GLEXTENSIONS_H+
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#define GLEXTENSIONS_H+
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+
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#include <QtOpenGL>+
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+
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/*+
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Functions resolved:+
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+
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glGenFramebuffersEXT+
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glGenRenderbuffersEXT+
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glBindRenderbufferEXT+
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glRenderbufferStorageEXT+
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glDeleteFramebuffersEXT+
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glDeleteRenderbuffersEXT+
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glBindFramebufferEXT+
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glFramebufferTexture2DEXT+
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glFramebufferRenderbufferEXT+
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glCheckFramebufferStatusEXT+
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+
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glActiveTexture+
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glTexImage3D+
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+
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glGenBuffers+
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glBindBuffer+
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glBufferData+
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glDeleteBuffers+
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glMapBuffer+
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glUnmapBuffer+
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*/+
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+
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#ifndef Q_WS_MAC+
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# ifndef APIENTRYP+
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#   ifdef APIENTRY+
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#     define APIENTRYP APIENTRY *+
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#   else+
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#     define APIENTRY+
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#     define APIENTRYP *+
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#   endif+
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# endif+
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#else+
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# define APIENTRY+
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# define APIENTRYP *+
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#endif+
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+
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#ifndef GL_VERSION_1_2+
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#define GL_TEXTURE_3D 0x806F+
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#define GL_TEXTURE_WRAP_R 0x8072+
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#define GL_CLAMP_TO_EDGE 0x812F+
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#define GL_BGRA 0x80E1+
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#endif+
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+
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#ifndef GL_VERSION_1_3+
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#define GL_TEXTURE0 0x84C0+
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#define GL_TEXTURE1 0x84C1+
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#define GL_TEXTURE2 0x84C2+
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#define GL_TEXTURE_CUBE_MAP 0x8513+
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#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515+
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//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516+
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//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517+
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//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518+
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//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519+
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//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A+
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#endif+
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+
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#ifndef GL_ARB_vertex_buffer_object+
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typedef ptrdiff_t GLsizeiptrARB;+
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#endif+
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+
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#ifndef GL_VERSION_1_5+
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#define GL_ARRAY_BUFFER 0x8892+
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#define GL_ELEMENT_ARRAY_BUFFER 0x8893+
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#define GL_READ_WRITE 0x88BA+
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#define GL_STATIC_DRAW 0x88E4+
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#endif+
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+
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#ifndef GL_EXT_framebuffer_object+
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#define GL_RENDERBUFFER_EXT 0x8D41+
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#define GL_FRAMEBUFFER_EXT 0x8D40+
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#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5+
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#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0+
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#define GL_DEPTH_ATTACHMENT_EXT 0x8D00+
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#endif+
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+
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typedef void (APIENTRY *_glGenFramebuffersEXT) (GLsizei, GLuint *);+
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typedef void (APIENTRY *_glGenRenderbuffersEXT) (GLsizei, GLuint *);+
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typedef void (APIENTRY *_glBindRenderbufferEXT) (GLenum, GLuint);+
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typedef void (APIENTRY *_glRenderbufferStorageEXT) (GLenum, GLenum, GLsizei, GLsizei);+
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typedef void (APIENTRY *_glDeleteFramebuffersEXT) (GLsizei, const GLuint*);+
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typedef void (APIENTRY *_glDeleteRenderbuffersEXT) (GLsizei, const GLuint*);+
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typedef void (APIENTRY *_glBindFramebufferEXT) (GLenum, GLuint);+
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typedef void (APIENTRY *_glFramebufferTexture2DEXT) (GLenum, GLenum, GLenum, GLuint, GLint);+
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typedef void (APIENTRY *_glFramebufferRenderbufferEXT) (GLenum, GLenum, GLenum, GLuint);+
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typedef GLenum (APIENTRY *_glCheckFramebufferStatusEXT) (GLenum);+
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+
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typedef void (APIENTRY *_glActiveTexture) (GLenum);+
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typedef void (APIENTRY *_glTexImage3D) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLsizei, GLint, GLenum, GLenum, const GLvoid *);+
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+
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typedef void (APIENTRY *_glGenBuffers) (GLsizei, GLuint *);+
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typedef void (APIENTRY *_glBindBuffer) (GLenum, GLuint);+
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typedef void (APIENTRY *_glBufferData) (GLenum, GLsizeiptrARB, const GLvoid *, GLenum);+
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typedef void (APIENTRY *_glDeleteBuffers) (GLsizei, const GLuint *);+
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typedef void *(APIENTRY *_glMapBuffer) (GLenum, GLenum);+
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typedef GLboolean (APIENTRY *_glUnmapBuffer) (GLenum);+
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+
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struct GLExtensionFunctions+
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{+
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	bool resolve(const QGLContext *context);+
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+
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    bool fboSupported();+
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    bool openGL15Supported(); // the rest: multi-texture, 3D-texture, vertex buffer objects+
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+
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	_glGenFramebuffersEXT GenFramebuffersEXT;+
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	_glGenRenderbuffersEXT GenRenderbuffersEXT;+
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	_glBindRenderbufferEXT BindRenderbufferEXT;+
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	_glRenderbufferStorageEXT RenderbufferStorageEXT;+
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	_glDeleteFramebuffersEXT DeleteFramebuffersEXT;+
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	_glDeleteRenderbuffersEXT DeleteRenderbuffersEXT;+
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	_glBindFramebufferEXT BindFramebufferEXT;+
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	_glFramebufferTexture2DEXT FramebufferTexture2DEXT;+
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	_glFramebufferRenderbufferEXT FramebufferRenderbufferEXT;+
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	_glCheckFramebufferStatusEXT CheckFramebufferStatusEXT;+
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+
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	_glActiveTexture ActiveTexture;+
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	_glTexImage3D TexImage3D;+
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+
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	_glGenBuffers GenBuffers;+
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	_glBindBuffer BindBuffer;+
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	_glBufferData BufferData;+
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	_glDeleteBuffers DeleteBuffers;+
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	_glMapBuffer MapBuffer;+
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	_glUnmapBuffer UnmapBuffer;+
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};+
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+
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inline GLExtensionFunctions &getGLExtensionFunctions()+
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{+
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	static GLExtensionFunctions funcs;+
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	return funcs;+
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}+
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+
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#define glGenFramebuffersEXT getGLExtensionFunctions().GenFramebuffersEXT+
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#define glGenRenderbuffersEXT getGLExtensionFunctions().GenRenderbuffersEXT+
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#define glBindRenderbufferEXT getGLExtensionFunctions().BindRenderbufferEXT+
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#define glRenderbufferStorageEXT getGLExtensionFunctions().RenderbufferStorageEXT+
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#define glDeleteFramebuffersEXT getGLExtensionFunctions().DeleteFramebuffersEXT+
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#define glDeleteRenderbuffersEXT getGLExtensionFunctions().DeleteRenderbuffersEXT+
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#define glBindFramebufferEXT getGLExtensionFunctions().BindFramebufferEXT+
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#define glFramebufferTexture2DEXT getGLExtensionFunctions().FramebufferTexture2DEXT+
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#define glFramebufferRenderbufferEXT getGLExtensionFunctions().FramebufferRenderbufferEXT+
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#define glCheckFramebufferStatusEXT getGLExtensionFunctions().CheckFramebufferStatusEXT+
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+
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#define glActiveTexture getGLExtensionFunctions().ActiveTexture+
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#define glTexImage3D getGLExtensionFunctions().TexImage3D+
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+
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#define glGenBuffers getGLExtensionFunctions().GenBuffers+
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#define glBindBuffer getGLExtensionFunctions().BindBuffer+
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#define glBufferData getGLExtensionFunctions().BufferData+
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#define glDeleteBuffers getGLExtensionFunctions().DeleteBuffers+
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#define glMapBuffer getGLExtensionFunctions().MapBuffer+
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#define glUnmapBuffer getGLExtensionFunctions().UnmapBuffer+
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+
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#endif+
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