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

**

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtOpenGL module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

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

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** 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 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: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

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** $QT_END_LICENSE$

**

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

#ifndef QGL_EXTENSIONS_P_H

#define QGL_EXTENSIONS_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of the Qt OpenGL classes.  This header file may change from

// version to version without notice, or even be removed.

//

// We mean it.

//

// extension prototypes

#ifndef Q_WS_MAC

# ifndef APIENTRYP

#   ifdef APIENTRY

#     define APIENTRYP APIENTRY *

#   else

#     define APIENTRY

#     define APIENTRYP *

#   endif

# endif

#else

# define APIENTRY

# define APIENTRYP *

#endif

#include <QtCore/qglobal.h>

#ifndef GL_ARB_vertex_buffer_object

typedef ptrdiff_t GLsizeiptrARB;

#endif

#ifndef GL_VERSION_2_0

typedef char GLchar;

#endif

// ARB_pixel_buffer_object

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

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

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

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

typedef GLvoid* (APIENTRY *_glMapBufferARB) (GLenum, GLenum);

typedef GLboolean (APIENTRY *_glUnmapBufferARB) (GLenum);

// ARB_fragment_program

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

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

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

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

typedef void (APIENTRY *_glProgramLocalParameter4fvARB) (GLenum, GLuint, const GLfloat *);

// GLSL

typedef GLuint (APIENTRY *_glCreateShader) (GLenum);

typedef void (APIENTRY *_glShaderSource) (GLuint, GLsizei, const char **, const GLint *);

typedef void (APIENTRY *_glShaderBinary) (GLint, const GLuint*, GLenum, const void*, GLint);

typedef void (APIENTRY *_glCompileShader) (GLuint);

typedef void (APIENTRY *_glDeleteShader) (GLuint);

typedef GLboolean (APIENTRY *_glIsShader) (GLuint);

typedef GLuint (APIENTRY *_glCreateProgram) ();

typedef void (APIENTRY *_glAttachShader) (GLuint, GLuint);

typedef void (APIENTRY *_glDetachShader) (GLuint, GLuint);

typedef void (APIENTRY *_glLinkProgram) (GLuint);

typedef void (APIENTRY *_glUseProgram) (GLuint);

typedef void (APIENTRY *_glDeleteProgram) (GLuint);

typedef GLboolean (APIENTRY *_glIsProgram) (GLuint);

typedef void (APIENTRY *_glGetShaderInfoLog) (GLuint, GLsizei, GLsizei *, char *);

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

typedef void (APIENTRY *_glGetShaderSource) (GLuint, GLsizei, GLsizei *, char *);

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

typedef void (APIENTRY *_glGetProgramInfoLog) (GLuint, GLsizei, GLsizei *, char *);

typedef GLuint (APIENTRY *_glGetUniformLocation) (GLuint, const char*);

typedef void (APIENTRY *_glUniform4fv) (GLint, GLsizei, const GLfloat *);

typedef void (APIENTRY *_glUniform3fv) (GLint, GLsizei, const GLfloat *);

typedef void (APIENTRY *_glUniform2fv) (GLint, GLsizei, const GLfloat *);

typedef void (APIENTRY *_glUniform1fv) (GLint, GLsizei, const GLfloat *);

typedef void (APIENTRY *_glUniform1i) (GLint, GLint);

typedef void (APIENTRY *_glUniform1iv) (GLint, GLsizei, const GLint *);

typedef void (APIENTRY *_glUniformMatrix2fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix3fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix4fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix2x3fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix2x4fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix3x2fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix3x4fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix4x2fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glUniformMatrix4x3fv) (GLint, GLsizei, GLboolean, const GLfloat *);

typedef void (APIENTRY *_glBindAttribLocation) (GLuint, GLuint, const char *);

typedef GLint (APIENTRY *_glGetAttribLocation) (GLuint, const char *);

typedef void (APIENTRY *_glVertexAttrib1fv) (GLuint, const GLfloat *);

typedef void (APIENTRY *_glVertexAttrib2fv) (GLuint, const GLfloat *);

typedef void (APIENTRY *_glVertexAttrib3fv) (GLuint, const GLfloat *);

typedef void (APIENTRY *_glVertexAttrib4fv) (GLuint, const GLfloat *);

typedef void (APIENTRY *_glVertexAttribPointer) (GLuint, GLint, GLenum, GLboolean, GLsizei, const GLvoid *);

typedef void (APIENTRY *_glDisableVertexAttribArray) (GLuint);

typedef void (APIENTRY *_glEnableVertexAttribArray) (GLuint);

typedef void (APIENTRY *_glGetProgramBinaryOES) (GLuint, GLsizei, GLsizei *, GLenum *, void *);

typedef void (APIENTRY *_glProgramBinaryOES) (GLuint, GLenum, const void *, GLint);

typedef void (APIENTRY *_glMultiTexCoord4f) (GLenum, GLfloat, GLfloat, GLfloat, GLfloat);

typedef void (APIENTRY *_glActiveStencilFaceEXT) (GLenum );

// Needed for GL2 engine:

typedef void (APIENTRY *_glStencilOpSeparate) (GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass);

typedef void (APIENTRY *_glActiveTexture) (GLenum);

typedef void (APIENTRY *_glBlendColor) (GLclampf, GLclampf, GLclampf, GLclampf);

// EXT_GL_framebuffer_object

typedef GLboolean (APIENTRY *_glIsRenderbuffer) (GLuint renderbuffer);

typedef void (APIENTRY *_glBindRenderbuffer) (GLenum target, GLuint renderbuffer);

typedef void (APIENTRY *_glDeleteRenderbuffers) (GLsizei n, const GLuint *renderbuffers);

typedef void (APIENTRY *_glGenRenderbuffers) (GLsizei n, GLuint *renderbuffers);

typedef void (APIENTRY *_glRenderbufferStorage) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);

typedef void (APIENTRY *_glGetRenderbufferParameteriv) (GLenum target, GLenum pname, GLint *params);

typedef GLboolean (APIENTRY *_glIsFramebuffer) (GLuint framebuffer);

typedef void (APIENTRY *_glBindFramebuffer) (GLenum target, GLuint framebuffer);

typedef void (APIENTRY *_glDeleteFramebuffers) (GLsizei n, const GLuint *framebuffers);

typedef void (APIENTRY *_glGenFramebuffers) (GLsizei n, GLuint *framebuffers);

typedef GLenum (APIENTRY *_glCheckFramebufferStatus) (GLenum target);

typedef void (APIENTRY *_glFramebufferTexture2D) (GLenum target, GLenum attachment, GLenum textarget,

                                                           GLuint texture, GLint level);

typedef void (APIENTRY *_glFramebufferRenderbuffer) (GLenum target, GLenum attachment, GLenum renderbuffertarget,

                                                              GLuint renderbuffer);

typedef void (APIENTRY *_glGetFramebufferAttachmentParameteriv) (GLenum target, GLenum attachment, GLenum pname,

                                                                          GLint *params);

typedef void (APIENTRY *_glGenerateMipmap) (GLenum target);

// EXT_GL_framebuffer_blit

typedef void (APIENTRY *_glBlitFramebufferEXT) (int srcX0, int srcY0, int srcX1, int srcY1,

                                                int dstX0, int dstY0, int dstX1, int dstY1,

                                                GLbitfield mask, GLenum filter);

// EXT_GL_framebuffer_multisample

typedef void (APIENTRY *_glRenderbufferStorageMultisampleEXT) (GLenum target, GLsizei samples,

                                                               GLenum internalformat, GLsizei width, GLsizei height);

// ARB_texture_compression

typedef void (APIENTRY *_glCompressedTexImage2DARB) (GLenum, GLint, GLenum, GLsizei,

                                                     GLsizei, GLint, GLsizei, const GLvoid *);

QT_BEGIN_NAMESPACE

struct QGLExtensionFuncs

{

    QGLExtensionFuncs() {

#if !defined(QT_OPENGL_ES_2)

        qt_glProgramStringARB = 0;

        qt_glBindProgramARB = 0;

        qt_glDeleteProgramsARB = 0;

        qt_glGenProgramsARB = 0;

        qt_glProgramLocalParameter4fvARB = 0;

        // GLSL

        qt_glCreateShader = 0;

        qt_glShaderSource = 0;

        qt_glShaderBinary = 0;

        qt_glCompileShader = 0;

        qt_glDeleteShader = 0;

        qt_glIsShader = 0;

        qt_glCreateProgram = 0;

        qt_glAttachShader = 0;

        qt_glDetachShader = 0;

        qt_glLinkProgram = 0;

        qt_glUseProgram = 0;

        qt_glDeleteProgram = 0;

        qt_glIsProgram = 0;

        qt_glGetShaderInfoLog = 0;

        qt_glGetShaderiv = 0;

        qt_glGetShaderSource = 0;

        qt_glGetProgramiv = 0;

        qt_glGetProgramInfoLog = 0;

        qt_glGetUniformLocation = 0;

        qt_glUniform4fv = 0;

        qt_glUniform3fv = 0;

        qt_glUniform2fv = 0;

        qt_glUniform1fv = 0;

        qt_glUniform1i = 0;

        qt_glUniform1iv = 0;

        qt_glUniformMatrix2fv = 0;

        qt_glUniformMatrix3fv = 0;

        qt_glUniformMatrix4fv = 0;

        qt_glUniformMatrix2x3fv = 0;

        qt_glUniformMatrix2x4fv = 0;

        qt_glUniformMatrix3x2fv = 0;

        qt_glUniformMatrix3x4fv = 0;

        qt_glUniformMatrix4x2fv = 0;

        qt_glUniformMatrix4x3fv = 0;

        qt_glBindAttribLocation = 0;

        qt_glGetAttribLocation = 0;

        qt_glVertexAttrib1fv = 0;

        qt_glVertexAttrib2fv = 0;

        qt_glVertexAttrib3fv = 0;

        qt_glVertexAttrib4fv = 0;

        qt_glVertexAttribPointer = 0;

        qt_glDisableVertexAttribArray = 0;

        qt_glEnableVertexAttribArray = 0;

        // Extras for GL2 engine:

        qt_glActiveTexture = 0;

        qt_glStencilOpSeparate = 0;

        qt_glBlendColor = 0;

        qt_glActiveStencilFaceEXT = 0;

        qt_glMultiTexCoord4f = 0;

#else

        qt_glslResolved = false;

        qt_glGetProgramBinaryOES = 0;

        qt_glProgramBinaryOES = 0;

#endif

        // FBOs

#if !defined(QT_OPENGL_ES_2)

        qt_glIsRenderbuffer = 0;

        qt_glBindRenderbuffer = 0;

        qt_glDeleteRenderbuffers = 0;

        qt_glGenRenderbuffers = 0;

        qt_glRenderbufferStorage = 0;

        qt_glGetRenderbufferParameteriv = 0;

        qt_glIsFramebuffer = 0;

        qt_glBindFramebuffer = 0;

        qt_glDeleteFramebuffers = 0;

        qt_glGenFramebuffers = 0;

        qt_glCheckFramebufferStatus = 0;

        qt_glFramebufferTexture2D = 0;

        qt_glFramebufferRenderbuffer = 0;

        qt_glGetFramebufferAttachmentParameteriv = 0;

        qt_glGenerateMipmap = 0;

#endif

        qt_glBlitFramebufferEXT = 0;

        qt_glRenderbufferStorageMultisampleEXT = 0;

        // Buffer objects:

#if !defined(QT_OPENGL_ES_2)

        qt_glBindBuffer = 0;

        qt_glDeleteBuffers = 0;

        qt_glGenBuffers = 0;

        qt_glBufferData = 0;

#endif

        qt_glMapBufferARB = 0;

        qt_glUnmapBufferARB = 0;

#if !defined(QT_OPENGL_ES)

        // Texture compression

        qt_glCompressedTexImage2DARB = 0;

#endif

    }

#if !defined(QT_OPENGL_ES_2)

    _glProgramStringARB qt_glProgramStringARB;

    _glBindProgramARB qt_glBindProgramARB;

    _glDeleteProgramsARB qt_glDeleteProgramsARB;

    _glGenProgramsARB qt_glGenProgramsARB;

    _glProgramLocalParameter4fvARB qt_glProgramLocalParameter4fvARB;

    // GLSL definitions

    _glCreateShader qt_glCreateShader;

    _glShaderSource qt_glShaderSource;

    _glShaderBinary qt_glShaderBinary;

    _glCompileShader qt_glCompileShader;

    _glDeleteShader qt_glDeleteShader;

    _glIsShader qt_glIsShader;

    _glCreateProgram qt_glCreateProgram;

    _glAttachShader qt_glAttachShader;

    _glDetachShader qt_glDetachShader;

    _glLinkProgram qt_glLinkProgram;

    _glUseProgram qt_glUseProgram;

    _glDeleteProgram qt_glDeleteProgram;

    _glIsProgram qt_glIsProgram;

    _glGetShaderInfoLog qt_glGetShaderInfoLog;

    _glGetShaderiv qt_glGetShaderiv;

    _glGetShaderSource qt_glGetShaderSource;

    _glGetProgramiv qt_glGetProgramiv;

    _glGetProgramInfoLog qt_glGetProgramInfoLog;

    _glGetUniformLocation qt_glGetUniformLocation;

    _glUniform4fv qt_glUniform4fv;

    _glUniform3fv qt_glUniform3fv;

    _glUniform2fv qt_glUniform2fv;

    _glUniform1fv qt_glUniform1fv;

    _glUniform1i qt_glUniform1i;

    _glUniform1iv qt_glUniform1iv;

    _glUniformMatrix2fv qt_glUniformMatrix2fv;

    _glUniformMatrix3fv qt_glUniformMatrix3fv;

    _glUniformMatrix4fv qt_glUniformMatrix4fv;

    _glUniformMatrix2x3fv qt_glUniformMatrix2x3fv;

    _glUniformMatrix2x4fv qt_glUniformMatrix2x4fv;

    _glUniformMatrix3x2fv qt_glUniformMatrix3x2fv;

    _glUniformMatrix3x4fv qt_glUniformMatrix3x4fv;

    _glUniformMatrix4x2fv qt_glUniformMatrix4x2fv;

    _glUniformMatrix4x3fv qt_glUniformMatrix4x3fv;

    _glBindAttribLocation qt_glBindAttribLocation;

    _glGetAttribLocation qt_glGetAttribLocation;

    _glVertexAttrib1fv qt_glVertexAttrib1fv;

    _glVertexAttrib2fv qt_glVertexAttrib2fv;

    _glVertexAttrib3fv qt_glVertexAttrib3fv;

    _glVertexAttrib4fv qt_glVertexAttrib4fv;

    _glVertexAttribPointer qt_glVertexAttribPointer;

    _glDisableVertexAttribArray qt_glDisableVertexAttribArray;

    _glEnableVertexAttribArray qt_glEnableVertexAttribArray;

#else

    bool qt_glslResolved;

    _glGetProgramBinaryOES qt_glGetProgramBinaryOES;

    _glProgramBinaryOES qt_glProgramBinaryOES;

#endif

    _glActiveStencilFaceEXT qt_glActiveStencilFaceEXT;

    _glMultiTexCoord4f qt_glMultiTexCoord4f;

#if !defined(QT_OPENGL_ES_2)

    // Extras needed for GL2 engine:

    _glActiveTexture qt_glActiveTexture;

    _glStencilOpSeparate qt_glStencilOpSeparate;

    _glBlendColor qt_glBlendColor;

#endif

    // FBOs

#if !defined(QT_OPENGL_ES_2)

    _glIsRenderbuffer qt_glIsRenderbuffer;

    _glBindRenderbuffer qt_glBindRenderbuffer;

    _glDeleteRenderbuffers qt_glDeleteRenderbuffers;

    _glGenRenderbuffers qt_glGenRenderbuffers;

    _glRenderbufferStorage qt_glRenderbufferStorage;

    _glGetRenderbufferParameteriv qt_glGetRenderbufferParameteriv;

    _glIsFramebuffer qt_glIsFramebuffer;

    _glBindFramebuffer qt_glBindFramebuffer;

    _glDeleteFramebuffers qt_glDeleteFramebuffers;

    _glGenFramebuffers qt_glGenFramebuffers;

    _glCheckFramebufferStatus qt_glCheckFramebufferStatus;

    _glFramebufferTexture2D qt_glFramebufferTexture2D;

    _glFramebufferRenderbuffer qt_glFramebufferRenderbuffer;

    _glGetFramebufferAttachmentParameteriv qt_glGetFramebufferAttachmentParameteriv;

    _glGenerateMipmap qt_glGenerateMipmap;

#endif

    _glBlitFramebufferEXT qt_glBlitFramebufferEXT;

    _glRenderbufferStorageMultisampleEXT qt_glRenderbufferStorageMultisampleEXT;

    // Buffer objects

#if !defined(QT_OPENGL_ES_2)

    _glBindBuffer qt_glBindBuffer;

    _glDeleteBuffers qt_glDeleteBuffers;

    _glGenBuffers qt_glGenBuffers;

    _glBufferData qt_glBufferData;

#endif

    _glMapBufferARB qt_glMapBufferARB;

    _glUnmapBufferARB qt_glUnmapBufferARB;

#if !defined(QT_OPENGL_ES)

    // Texture compression

    _glCompressedTexImage2DARB qt_glCompressedTexImage2DARB;

#endif

};

// OpenGL constants

/* NV_texture_rectangle */

#ifndef GL_NV_texture_rectangle

#define GL_TEXTURE_RECTANGLE_NV           0x84F5

#define GL_TEXTURE_BINDING_RECTANGLE_NV   0x84F6

#define GL_PROXY_TEXTURE_RECTANGLE_NV     0x84F7

#define GL_MAX_RECTANGLE_TEXTURE_SIZE_NV  0x84F8

#endif

#ifndef GL_BGRA

#define GL_BGRA 0x80E1

#endif

#ifndef GL_RGB16

#define GL_RGB16 32852

#endif

#ifndef GL_UNSIGNED_SHORT_5_6_5

#define GL_UNSIGNED_SHORT_5_6_5 33635

#endif

#ifndef GL_UNSIGNED_INT_8_8_8_8_REV

#define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367

#endif

#ifndef GL_MULTISAMPLE

#define GL_MULTISAMPLE  0x809D

#endif

#ifndef GL_CLAMP_TO_EDGE

#define GL_CLAMP_TO_EDGE 0x812F

#endif

#ifndef GL_IBM_texture_mirrored_repeat

#define GL_MIRRORED_REPEAT_IBM            0x8370

#endif

#ifndef GL_SGIS_generate_mipmap

#define GL_GENERATE_MIPMAP_SGIS           0x8191

#define GL_GENERATE_MIPMAP_HINT_SGIS      0x8192

#endif

// ARB_fragment_program extension protos

#ifndef GL_FRAGMENT_PROGRAM_ARB

#define GL_FRAGMENT_PROGRAM_ARB           0x8804

#define GL_PROGRAM_FORMAT_ASCII_ARB       0x8875

#endif

#ifndef GL_PIXEL_UNPACK_BUFFER_ARB

#define GL_PIXEL_UNPACK_BUFFER_ARB 0x88EC

#endif

#ifndef GL_WRITE_ONLY_ARB

#define GL_WRITE_ONLY_ARB 0x88B9

#endif

#ifndef GL_STREAM_DRAW_ARB

#define GL_STREAM_DRAW_ARB 0x88E0

#endif

// Stencil wrap and two-side defines

#ifndef GL_STENCIL_TEST_TWO_SIDE_EXT

#define GL_STENCIL_TEST_TWO_SIDE_EXT 0x8910

#endif

#ifndef GL_INCR_WRAP_EXT

#define GL_INCR_WRAP_EXT 0x8507

#endif

#ifndef GL_DECR_WRAP_EXT

#define GL_DECR_WRAP_EXT 0x8508

#endif

#ifndef GL_TEXTURE0

#define GL_TEXTURE0 0x84C0

#endif

#ifndef GL_TEXTURE1

#define GL_TEXTURE1 0x84C1

#endif

#ifndef GL_EXT_framebuffer_object

#define GL_INVALID_FRAMEBUFFER_OPERATION_EXT                    0x0506

#define GL_MAX_RENDERBUFFER_SIZE_EXT                            0x84E8

#define GL_FRAMEBUFFER_BINDING_EXT                              0x8CA6

#define GL_RENDERBUFFER_BINDING_EXT                             0x8CA7

#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_EXT               0x8CD0

#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_EXT               0x8CD1

#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_EXT             0x8CD2

#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE_EXT     0x8CD3

#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_3D_ZOFFSET_EXT        0x8CD4

#define GL_FRAMEBUFFER_COMPLETE_EXT                             0x8CD5

#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT                0x8CD6

#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT        0x8CD7

#define GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT      0x8CD8

#define GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT                0x8CD9

#define GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT                   0x8CDA

#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT               0x8CDB

#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT               0x8CDC

#define GL_FRAMEBUFFER_UNSUPPORTED_EXT                          0x8CDD

#define GL_MAX_COLOR_ATTACHMENTS_EXT                            0x8CDF

#define GL_COLOR_ATTACHMENT0_EXT                                0x8CE0

#define GL_COLOR_ATTACHMENT1_EXT                                0x8CE1

#define GL_COLOR_ATTACHMENT2_EXT                                0x8CE2

#define GL_COLOR_ATTACHMENT3_EXT                                0x8CE3

#define GL_COLOR_ATTACHMENT4_EXT                                0x8CE4

#define GL_COLOR_ATTACHMENT5_EXT                                0x8CE5

#define GL_COLOR_ATTACHMENT6_EXT                                0x8CE6

#define GL_COLOR_ATTACHMENT7_EXT                                0x8CE7

#define GL_COLOR_ATTACHMENT8_EXT                                0x8CE8

#define GL_COLOR_ATTACHMENT9_EXT                                0x8CE9

#define GL_COLOR_ATTACHMENT10_EXT                               0x8CEA

#define GL_COLOR_ATTACHMENT11_EXT                               0x8CEB