/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public

    License along with this library; if not, write to the Free Software

    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga

    slouken@libsdl.org

*/

/** @file SDL_opengl.h

 *  This is a simple file to encapsulate the OpenGL API headers

 */

#include "SDL_config.h"

#ifdef __WIN32__

#define WIN32_LEAN_AND_MEAN

#ifndef NOMINMAX

#define NOMINMAX	/* Don't defined min() and max() */

#endif

#include <windows.h>

#endif

#ifndef NO_SDL_GLEXT

#define __glext_h_  /* Don't let gl.h include glext.h */

#endif

#if defined(__MACOSX__)

#include <OpenGL/gl.h>	/* Header File For The OpenGL Library */

#include <OpenGL/glu.h>	/* Header File For The GLU Library */

#elif defined(__MACOS__)

#include <gl.h>		/* Header File For The OpenGL Library */

#include <glu.h>	/* Header File For The GLU Library */

#else

#include <GL/gl.h>	/* Header File For The OpenGL Library */

#include <GL/glu.h>	/* Header File For The GLU Library */

#endif

#ifndef NO_SDL_GLEXT

#undef __glext_h_

#endif

/** @name GLext.h

 *  This file taken from "GLext.h" from the Jeff Molofee OpenGL tutorials.

 *  It is included here because glext.h is not available on some systems.

 *  If you don't want this version included, simply define "NO_SDL_GLEXT"

 */

/*@{*/

#ifndef NO_SDL_GLEXT

#if !defined(__glext_h_) && !defined(GL_GLEXT_LEGACY)

#define __glext_h_

#ifdef __cplusplus

extern "C" {

#endif

/*

** License Applicability. Except to the extent portions of this file are

** made subject to an alternative license as permitted in the SGI Free

** Software License B, Version 1.1 (the "License"), the contents of this

** file are subject only to the provisions of the License. You may not use

** this file except in compliance with the License. You may obtain a copy

** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600

** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:

** 

** http://oss.sgi.com/projects/FreeB

** 

** Note that, as provided in the License, the Software is distributed on an

** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS

** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND

** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A

** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.

** 

** Original Code. The Original Code is: OpenGL Sample Implementation,

** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,

** Inc. The Original Code is Copyright (c) 1991-2004 Silicon Graphics, Inc.

** Copyright in any portions created by third parties is as indicated

** elsewhere herein. All Rights Reserved.

** 

** Additional Notice Provisions: This software was created using the

** OpenGL(R) version 1.2.1 Sample Implementation published by SGI, but has

** not been independently verified as being compliant with the OpenGL(R)

** version 1.2.1 Specification.

*/

#if defined(_WIN32) && !defined(APIENTRY) && !defined(__CYGWIN__) && !defined(__SCITECH_SNAP__)

#define WIN32_LEAN_AND_MEAN 1

#include <windows.h>

#endif

#ifndef APIENTRY

#define APIENTRY

#endif

#ifndef APIENTRYP

#define APIENTRYP APIENTRY *

#endif

#ifndef GLAPI

#define GLAPI extern

#endif

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

/* Header file version number, required by OpenGL ABI for Linux */

/* glext.h last updated 2005/06/20 */

/* Current version at http://oss.sgi.com/projects/ogl-sample/registry/ */

#define GL_GLEXT_VERSION 29

#ifndef GL_VERSION_1_2

#define GL_UNSIGNED_BYTE_3_3_2            0x8032

#define GL_UNSIGNED_SHORT_4_4_4_4         0x8033

#define GL_UNSIGNED_SHORT_5_5_5_1         0x8034

#define GL_UNSIGNED_INT_8_8_8_8           0x8035

#define GL_UNSIGNED_INT_10_10_10_2        0x8036

#define GL_RESCALE_NORMAL                 0x803A

#define GL_TEXTURE_BINDING_3D             0x806A

#define GL_PACK_SKIP_IMAGES               0x806B

#define GL_PACK_IMAGE_HEIGHT              0x806C

#define GL_UNPACK_SKIP_IMAGES             0x806D

#define GL_UNPACK_IMAGE_HEIGHT            0x806E

#define GL_TEXTURE_3D                     0x806F

#define GL_PROXY_TEXTURE_3D               0x8070

#define GL_TEXTURE_DEPTH                  0x8071

#define GL_TEXTURE_WRAP_R                 0x8072

#define GL_MAX_3D_TEXTURE_SIZE            0x8073

#define GL_UNSIGNED_BYTE_2_3_3_REV        0x8362

#define GL_UNSIGNED_SHORT_5_6_5           0x8363

#define GL_UNSIGNED_SHORT_5_6_5_REV       0x8364

#define GL_UNSIGNED_SHORT_4_4_4_4_REV     0x8365

#define GL_UNSIGNED_SHORT_1_5_5_5_REV     0x8366

#define GL_UNSIGNED_INT_8_8_8_8_REV       0x8367

#define GL_UNSIGNED_INT_2_10_10_10_REV    0x8368

#define GL_BGR                            0x80E0

#define GL_BGRA                           0x80E1

#define GL_MAX_ELEMENTS_VERTICES          0x80E8

#define GL_MAX_ELEMENTS_INDICES           0x80E9

#define GL_CLAMP_TO_EDGE                  0x812F

#define GL_TEXTURE_MIN_LOD                0x813A

#define GL_TEXTURE_MAX_LOD                0x813B

#define GL_TEXTURE_BASE_LEVEL             0x813C

#define GL_TEXTURE_MAX_LEVEL              0x813D

#define GL_LIGHT_MODEL_COLOR_CONTROL      0x81F8

#define GL_SINGLE_COLOR                   0x81F9

#define GL_SEPARATE_SPECULAR_COLOR        0x81FA

#define GL_SMOOTH_POINT_SIZE_RANGE        0x0B12

#define GL_SMOOTH_POINT_SIZE_GRANULARITY  0x0B13

#define GL_SMOOTH_LINE_WIDTH_RANGE        0x0B22

#define GL_SMOOTH_LINE_WIDTH_GRANULARITY  0x0B23

#define GL_ALIASED_POINT_SIZE_RANGE       0x846D

#define GL_ALIASED_LINE_WIDTH_RANGE       0x846E

#endif

#ifndef GL_ARB_imaging

#define GL_CONSTANT_COLOR                 0x8001

#define GL_ONE_MINUS_CONSTANT_COLOR       0x8002

#define GL_CONSTANT_ALPHA                 0x8003

#define GL_ONE_MINUS_CONSTANT_ALPHA       0x8004

#define GL_BLEND_COLOR                    0x8005

#define GL_FUNC_ADD                       0x8006

#define GL_MIN                            0x8007

#define GL_MAX                            0x8008

#define GL_BLEND_EQUATION                 0x8009

#define GL_FUNC_SUBTRACT                  0x800A

#define GL_FUNC_REVERSE_SUBTRACT          0x800B

#define GL_CONVOLUTION_1D                 0x8010

#define GL_CONVOLUTION_2D                 0x8011

#define GL_SEPARABLE_2D                   0x8012

#define GL_CONVOLUTION_BORDER_MODE        0x8013

#define GL_CONVOLUTION_FILTER_SCALE       0x8014

#define GL_CONVOLUTION_FILTER_BIAS        0x8015

#define GL_REDUCE                         0x8016

#define GL_CONVOLUTION_FORMAT             0x8017

#define GL_CONVOLUTION_WIDTH              0x8018

#define GL_CONVOLUTION_HEIGHT             0x8019

#define GL_MAX_CONVOLUTION_WIDTH          0x801A

#define GL_MAX_CONVOLUTION_HEIGHT         0x801B

#define GL_POST_CONVOLUTION_RED_SCALE     0x801C

#define GL_POST_CONVOLUTION_GREEN_SCALE   0x801D

#define GL_POST_CONVOLUTION_BLUE_SCALE    0x801E

#define GL_POST_CONVOLUTION_ALPHA_SCALE   0x801F

#define GL_POST_CONVOLUTION_RED_BIAS      0x8020

#define GL_POST_CONVOLUTION_GREEN_BIAS    0x8021

#define GL_POST_CONVOLUTION_BLUE_BIAS     0x8022

#define GL_POST_CONVOLUTION_ALPHA_BIAS    0x8023

#define GL_HISTOGRAM                      0x8024

#define GL_PROXY_HISTOGRAM                0x8025

#define GL_HISTOGRAM_WIDTH                0x8026

#define GL_HISTOGRAM_FORMAT               0x8027

#define GL_HISTOGRAM_RED_SIZE             0x8028

#define GL_HISTOGRAM_GREEN_SIZE           0x8029

#define GL_HISTOGRAM_BLUE_SIZE            0x802A

#define GL_HISTOGRAM_ALPHA_SIZE           0x802B

#define GL_HISTOGRAM_LUMINANCE_SIZE       0x802C

#define GL_HISTOGRAM_SINK                 0x802D

#define GL_MINMAX                         0x802E

#define GL_MINMAX_FORMAT                  0x802F

#define GL_MINMAX_SINK                    0x8030

#define GL_TABLE_TOO_LARGE                0x8031

#define GL_COLOR_MATRIX                   0x80B1

#define GL_COLOR_MATRIX_STACK_DEPTH       0x80B2

#define GL_MAX_COLOR_MATRIX_STACK_DEPTH   0x80B3

#define GL_POST_COLOR_MATRIX_RED_SCALE    0x80B4

#define GL_POST_COLOR_MATRIX_GREEN_SCALE  0x80B5

#define GL_POST_COLOR_MATRIX_BLUE_SCALE   0x80B6

#define GL_POST_COLOR_MATRIX_ALPHA_SCALE  0x80B7

#define GL_POST_COLOR_MATRIX_RED_BIAS     0x80B8

#define GL_POST_COLOR_MATRIX_GREEN_BIAS   0x80B9

#define GL_POST_COLOR_MATRIX_BLUE_BIAS    0x80BA

#define GL_POST_COLOR_MATRIX_ALPHA_BIAS   0x80BB

#define GL_COLOR_TABLE                    0x80D0

#define GL_POST_CONVOLUTION_COLOR_TABLE   0x80D1

#define GL_POST_COLOR_MATRIX_COLOR_TABLE  0x80D2

#define GL_PROXY_COLOR_TABLE              0x80D3

#define GL_PROXY_POST_CONVOLUTION_COLOR_TABLE 0x80D4

#define GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE 0x80D5

#define GL_COLOR_TABLE_SCALE              0x80D6

#define GL_COLOR_TABLE_BIAS               0x80D7

#define GL_COLOR_TABLE_FORMAT             0x80D8

#define GL_COLOR_TABLE_WIDTH              0x80D9

#define GL_COLOR_TABLE_RED_SIZE           0x80DA

#define GL_COLOR_TABLE_GREEN_SIZE         0x80DB

#define GL_COLOR_TABLE_BLUE_SIZE          0x80DC

#define GL_COLOR_TABLE_ALPHA_SIZE         0x80DD

#define GL_COLOR_TABLE_LUMINANCE_SIZE     0x80DE

#define GL_COLOR_TABLE_INTENSITY_SIZE     0x80DF

#define GL_CONSTANT_BORDER                0x8151

#define GL_REPLICATE_BORDER               0x8153

#define GL_CONVOLUTION_BORDER_COLOR       0x8154

#endif

#ifndef GL_VERSION_1_3

#define GL_TEXTURE0                       0x84C0

#define GL_TEXTURE1                       0x84C1

#define GL_TEXTURE2                       0x84C2

#define GL_TEXTURE3                       0x84C3

#define GL_TEXTURE4                       0x84C4

#define GL_TEXTURE5                       0x84C5

#define GL_TEXTURE6                       0x84C6

#define GL_TEXTURE7                       0x84C7

#define GL_TEXTURE8                       0x84C8

#define GL_TEXTURE9                       0x84C9

#define GL_TEXTURE10                      0x84CA

#define GL_TEXTURE11                      0x84CB

#define GL_TEXTURE12                      0x84CC

#define GL_TEXTURE13                      0x84CD

#define GL_TEXTURE14                      0x84CE

#define GL_TEXTURE15                      0x84CF

#define GL_TEXTURE16                      0x84D0

#define GL_TEXTURE17                      0x84D1

#define GL_TEXTURE18                      0x84D2

#define GL_TEXTURE19                      0x84D3

#define GL_TEXTURE20                      0x84D4

#define GL_TEXTURE21                      0x84D5

#define GL_TEXTURE22                      0x84D6

#define GL_TEXTURE23                      0x84D7

#define GL_TEXTURE24                      0x84D8

#define GL_TEXTURE25                      0x84D9

#define GL_TEXTURE26                      0x84DA

#define GL_TEXTURE27                      0x84DB

#define GL_TEXTURE28                      0x84DC

#define GL_TEXTURE29                      0x84DD

#define GL_TEXTURE30                      0x84DE

#define GL_TEXTURE31                      0x84DF

#define GL_ACTIVE_TEXTURE                 0x84E0

#define GL_CLIENT_ACTIVE_TEXTURE          0x84E1

#define GL_MAX_TEXTURE_UNITS              0x84E2

#define GL_TRANSPOSE_MODELVIEW_MATRIX     0x84E3

#define GL_TRANSPOSE_PROJECTION_MATRIX    0x84E4

#define GL_TRANSPOSE_TEXTURE_MATRIX       0x84E5

#define GL_TRANSPOSE_COLOR_MATRIX         0x84E6

#define GL_MULTISAMPLE                    0x809D

#define GL_SAMPLE_ALPHA_TO_COVERAGE       0x809E

#define GL_SAMPLE_ALPHA_TO_ONE            0x809F

#define GL_SAMPLE_COVERAGE                0x80A0

#define GL_SAMPLE_BUFFERS                 0x80A8

#define GL_SAMPLES                        0x80A9

#define GL_SAMPLE_COVERAGE_VALUE          0x80AA

#define GL_SAMPLE_COVERAGE_INVERT         0x80AB

#define GL_MULTISAMPLE_BIT                0x20000000

#define GL_NORMAL_MAP                     0x8511

#define GL_REFLECTION_MAP                 0x8512

#define GL_TEXTURE_CUBE_MAP               0x8513

#define GL_TEXTURE_BINDING_CUBE_MAP       0x8514

#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

#define GL_PROXY_TEXTURE_CUBE_MAP         0x851B

#define GL_MAX_CUBE_MAP_TEXTURE_SIZE      0x851C

#define GL_COMPRESSED_ALPHA               0x84E9

#define GL_COMPRESSED_LUMINANCE           0x84EA

#define GL_COMPRESSED_LUMINANCE_ALPHA     0x84EB

#define GL_COMPRESSED_INTENSITY           0x84EC

#define GL_COMPRESSED_RGB                 0x84ED

#define GL_COMPRESSED_RGBA                0x84EE

#define GL_TEXTURE_COMPRESSION_HINT       0x84EF

#define GL_TEXTURE_COMPRESSED_IMAGE_SIZE  0x86A0

#define GL_TEXTURE_COMPRESSED             0x86A1

#define GL_NUM_COMPRESSED_TEXTURE_FORMATS 0x86A2

#define GL_COMPRESSED_TEXTURE_FORMATS     0x86A3

#define GL_CLAMP_TO_BORDER                0x812D

#define GL_COMBINE                        0x8570

#define GL_COMBINE_RGB                    0x8571

#define GL_COMBINE_ALPHA                  0x8572

#define GL_SOURCE0_RGB                    0x8580

#define GL_SOURCE1_RGB                    0x8581

#define GL_SOURCE2_RGB                    0x8582

#define GL_SOURCE0_ALPHA                  0x8588

#define GL_SOURCE1_ALPHA                  0x8589

#define GL_SOURCE2_ALPHA                  0x858A

#define GL_OPERAND0_RGB                   0x8590

#define GL_OPERAND1_RGB                   0x8591

#define GL_OPERAND2_RGB                   0x8592

#define GL_OPERAND0_ALPHA                 0x8598

#define GL_OPERAND1_ALPHA                 0x8599

#define GL_OPERAND2_ALPHA                 0x859A

#define GL_RGB_SCALE                      0x8573

#define GL_ADD_SIGNED                     0x8574

#define GL_INTERPOLATE                    0x8575

#define GL_SUBTRACT                       0x84E7

#define GL_CONSTANT                       0x8576

#define GL_PRIMARY_COLOR                  0x8577

#define GL_PREVIOUS                       0x8578

#define GL_DOT3_RGB                       0x86AE

#define GL_DOT3_RGBA                      0x86AF

#endif

#ifndef GL_VERSION_1_4

#define GL_BLEND_DST_RGB                  0x80C8

#define GL_BLEND_SRC_RGB                  0x80C9

#define GL_BLEND_DST_ALPHA                0x80CA

#define GL_BLEND_SRC_ALPHA                0x80CB

#define GL_POINT_SIZE_MIN                 0x8126

#define GL_POINT_SIZE_MAX                 0x8127

#define GL_POINT_FADE_THRESHOLD_SIZE      0x8128

#define GL_POINT_DISTANCE_ATTENUATION     0x8129

#define GL_GENERATE_MIPMAP                0x8191

#define GL_GENERATE_MIPMAP_HINT           0x8192

#define GL_DEPTH_COMPONENT16              0x81A5

#define GL_DEPTH_COMPONENT24              0x81A6

#define GL_DEPTH_COMPONENT32              0x81A7

#define GL_MIRRORED_REPEAT                0x8370

#define GL_FOG_COORDINATE_SOURCE          0x8450

#define GL_FOG_COORDINATE                 0x8451

#define GL_FRAGMENT_DEPTH                 0x8452

#define GL_CURRENT_FOG_COORDINATE         0x8453

#define GL_FOG_COORDINATE_ARRAY_TYPE      0x8454

#define GL_FOG_COORDINATE_ARRAY_STRIDE    0x8455

#define GL_FOG_COORDINATE_ARRAY_POINTER   0x8456

#define GL_FOG_COORDINATE_ARRAY           0x8457

#define GL_COLOR_SUM                      0x8458

#define GL_CURRENT_SECONDARY_COLOR        0x8459

#define GL_SECONDARY_COLOR_ARRAY_SIZE     0x845A

#define GL_SECONDARY_COLOR_ARRAY_TYPE     0x845B

#define GL_SECONDARY_COLOR_ARRAY_STRIDE   0x845C

#define GL_SECONDARY_COLOR_ARRAY_POINTER  0x845D

#define GL_SECONDARY_COLOR_ARRAY          0x845E

#define GL_MAX_TEXTURE_LOD_BIAS           0x84FD

#define GL_TEXTURE_FILTER_CONTROL         0x8500

#define GL_TEXTURE_LOD_BIAS               0x8501

#define GL_INCR_WRAP                      0x8507

#define GL_DECR_WRAP                      0x8508

#define GL_TEXTURE_DEPTH_SIZE             0x884A

#define GL_DEPTH_TEXTURE_MODE             0x884B

#define GL_TEXTURE_COMPARE_MODE           0x884C

#define GL_TEXTURE_COMPARE_FUNC           0x884D

#define GL_COMPARE_R_TO_TEXTURE           0x884E

#endif

#ifndef GL_VERSION_1_5

#define GL_BUFFER_SIZE                    0x8764

#define GL_BUFFER_USAGE                   0x8765

#define GL_QUERY_COUNTER_BITS             0x8864

#define GL_CURRENT_QUERY                  0x8865

#define GL_QUERY_RESULT                   0x8866

#define GL_QUERY_RESULT_AVAILABLE         0x8867

#define GL_ARRAY_BUFFER                   0x8892

#define GL_ELEMENT_ARRAY_BUFFER           0x8893

#define GL_ARRAY_BUFFER_BINDING           0x8894

#define GL_ELEMENT_ARRAY_BUFFER_BINDING   0x8895

#define GL_VERTEX_ARRAY_BUFFER_BINDING    0x8896

#define GL_NORMAL_ARRAY_BUFFER_BINDING    0x8897

#define GL_COLOR_ARRAY_BUFFER_BINDING     0x8898

#define GL_INDEX_ARRAY_BUFFER_BINDING     0x8899

#define GL_TEXTURE_COORD_ARRAY_BUFFER_BINDING 0x889A

#define GL_EDGE_FLAG_ARRAY_BUFFER_BINDING 0x889B

#define GL_SECONDARY_COLOR_ARRAY_BUFFER_BINDING 0x889C

#define GL_FOG_COORDINATE_ARRAY_BUFFER_BINDING 0x889D

#define GL_WEIGHT_ARRAY_BUFFER_BINDING    0x889E

#define GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING 0x889F

#define GL_READ_ONLY                      0x88B8

#define GL_WRITE_ONLY                     0x88B9

#define GL_READ_WRITE                     0x88BA

#define GL_BUFFER_ACCESS                  0x88BB

#define GL_BUFFER_MAPPED                  0x88BC

#define GL_BUFFER_MAP_POINTER             0x88BD

#define GL_STREAM_DRAW                    0x88E0

#define GL_STREAM_READ                    0x88E1

#define GL_STREAM_COPY                    0x88E2

#define GL_STATIC_DRAW                    0x88E4

#define GL_STATIC_READ                    0x88E5

#define GL_STATIC_COPY                    0x88E6

#define GL_DYNAMIC_DRAW                   0x88E8

#define GL_DYNAMIC_READ                   0x88E9

#define GL_DYNAMIC_COPY                   0x88EA

#define GL_SAMPLES_PASSED                 0x8914