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** This file contains pre-release code and may not be distributed.

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** this package.

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** General Public 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

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****************************************************************************/

#ifndef GLEXTENSIONS_H

#define GLEXTENSIONS_H

#include <QtOpenGL>

/*

Functions resolved:

glGenFramebuffersEXT

glGenRenderbuffersEXT

glBindRenderbufferEXT

glRenderbufferStorageEXT

glDeleteFramebuffersEXT

glDeleteRenderbuffersEXT

glBindFramebufferEXT

glFramebufferTexture2DEXT

glFramebufferRenderbufferEXT

glCheckFramebufferStatusEXT

glActiveTexture

glTexImage3D

glGenBuffers

glBindBuffer

glBufferData

glDeleteBuffers

glMapBuffer

glUnmapBuffer

*/

#ifndef Q_WS_MAC

# ifndef APIENTRYP

#   ifdef APIENTRY

#     define APIENTRYP APIENTRY *

#   else

#     define APIENTRY

#     define APIENTRYP *

#   endif

# endif

#else

# define APIENTRY

# define APIENTRYP *

#endif

#ifndef GL_VERSION_1_2

#define GL_TEXTURE_3D 0x806F

#define GL_TEXTURE_WRAP_R 0x8072

#define GL_CLAMP_TO_EDGE 0x812F

#define GL_BGRA 0x80E1

#endif

#ifndef GL_VERSION_1_3

#define GL_TEXTURE0 0x84C0

#define GL_TEXTURE1 0x84C1

#define GL_TEXTURE2 0x84C2

#define GL_TEXTURE_CUBE_MAP 0x8513

#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515

//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X 0x8516

//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y 0x8517

//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y 0x8518

//#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z 0x8519

//#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z 0x851A

#endif

#ifndef GL_ARB_vertex_buffer_object

typedef ptrdiff_t GLsizeiptrARB;

#endif

#ifndef GL_VERSION_1_5

#define GL_ARRAY_BUFFER 0x8892

#define GL_ELEMENT_ARRAY_BUFFER 0x8893

#define GL_READ_WRITE 0x88BA

#define GL_STATIC_DRAW 0x88E4

#endif

#ifndef GL_EXT_framebuffer_object

#define GL_RENDERBUFFER_EXT 0x8D41

#define GL_FRAMEBUFFER_EXT 0x8D40

#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5

#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0

#define GL_DEPTH_ATTACHMENT_EXT 0x8D00

#endif

typedef void (APIENTRY *_glGenFramebuffersEXT) (GLsizei, GLuint *);

typedef void (APIENTRY *_glGenRenderbuffersEXT) (GLsizei, GLuint *);

typedef void (APIENTRY *_glBindRenderbufferEXT) (GLenum, GLuint);

typedef void (APIENTRY *_glRenderbufferStorageEXT) (GLenum, GLenum, GLsizei, GLsizei);

typedef void (APIENTRY *_glDeleteFramebuffersEXT) (GLsizei, const GLuint*);

typedef void (APIENTRY *_glDeleteRenderbuffersEXT) (GLsizei, const GLuint*);

typedef void (APIENTRY *_glBindFramebufferEXT) (GLenum, GLuint);

typedef void (APIENTRY *_glFramebufferTexture2DEXT) (GLenum, GLenum, GLenum, GLuint, GLint);

typedef void (APIENTRY *_glFramebufferRenderbufferEXT) (GLenum, GLenum, GLenum, GLuint);

typedef GLenum (APIENTRY *_glCheckFramebufferStatusEXT) (GLenum);

typedef void (APIENTRY *_glActiveTexture) (GLenum);

typedef void (APIENTRY *_glTexImage3D) (GLenum, GLint, GLenum, GLsizei, GLsizei, GLsizei, GLint, GLenum, GLenum, const GLvoid *);

typedef void (APIENTRY *_glGenBuffers) (GLsizei, GLuint *);

typedef void (APIENTRY *_glBindBuffer) (GLenum, GLuint);

typedef void (APIENTRY *_glBufferData) (GLenum, GLsizeiptrARB, const GLvoid *, GLenum);

typedef void (APIENTRY *_glDeleteBuffers) (GLsizei, const GLuint *);

typedef void *(APIENTRY *_glMapBuffer) (GLenum, GLenum);

typedef GLboolean (APIENTRY *_glUnmapBuffer) (GLenum);

struct GLExtensionFunctions

{

	bool resolve(const QGLContext *context);

    bool fboSupported();

    bool openGL15Supported(); // the rest: multi-texture, 3D-texture, vertex buffer objects

	_glGenFramebuffersEXT GenFramebuffersEXT;

	_glGenRenderbuffersEXT GenRenderbuffersEXT;

	_glBindRenderbufferEXT BindRenderbufferEXT;

	_glRenderbufferStorageEXT RenderbufferStorageEXT;

	_glDeleteFramebuffersEXT DeleteFramebuffersEXT;

	_glDeleteRenderbuffersEXT DeleteRenderbuffersEXT;

	_glBindFramebufferEXT BindFramebufferEXT;

	_glFramebufferTexture2DEXT FramebufferTexture2DEXT;

	_glFramebufferRenderbufferEXT FramebufferRenderbufferEXT;

	_glCheckFramebufferStatusEXT CheckFramebufferStatusEXT;

	_glActiveTexture ActiveTexture;

	_glTexImage3D TexImage3D;

	_glGenBuffers GenBuffers;

	_glBindBuffer BindBuffer;

	_glBufferData BufferData;

	_glDeleteBuffers DeleteBuffers;

	_glMapBuffer MapBuffer;

	_glUnmapBuffer UnmapBuffer;

};

inline GLExtensionFunctions &getGLExtensionFunctions()

{

	static GLExtensionFunctions funcs;

	return funcs;

}

#define glGenFramebuffersEXT getGLExtensionFunctions().GenFramebuffersEXT

#define glGenRenderbuffersEXT getGLExtensionFunctions().GenRenderbuffersEXT

#define glBindRenderbufferEXT getGLExtensionFunctions().BindRenderbufferEXT

#define glRenderbufferStorageEXT getGLExtensionFunctions().RenderbufferStorageEXT

#define glDeleteFramebuffersEXT getGLExtensionFunctions().DeleteFramebuffersEXT

#define glDeleteRenderbuffersEXT getGLExtensionFunctions().DeleteRenderbuffersEXT

#define glBindFramebufferEXT getGLExtensionFunctions().BindFramebufferEXT

#define glFramebufferTexture2DEXT getGLExtensionFunctions().FramebufferTexture2DEXT

#define glFramebufferRenderbufferEXT getGLExtensionFunctions().FramebufferRenderbufferEXT

#define glCheckFramebufferStatusEXT getGLExtensionFunctions().CheckFramebufferStatusEXT

#define glActiveTexture getGLExtensionFunctions().ActiveTexture

#define glTexImage3D getGLExtensionFunctions().TexImage3D

#define glGenBuffers getGLExtensionFunctions().GenBuffers

#define glBindBuffer getGLExtensionFunctions().BindBuffer

#define glBufferData getGLExtensionFunctions().BufferData

#define glDeleteBuffers getGLExtensionFunctions().DeleteBuffers

#define glMapBuffer getGLExtensionFunctions().MapBuffer

#define glUnmapBuffer getGLExtensionFunctions().UnmapBuffer

#endif