#ifndef GLQUAKE_H
#define GLQUAKE_H

#include <stddef.h>

#ifdef USE_GLES2
#include <SDL_opengles2.h>
#else
//#include <SDL_opengl.h>
//#include <SDL_opengl_glext.h>
#endif //USE_GLES2

// disable data conversion warnings

#ifdef _MSC_VER
#pragma warning(disable : 4310) // LadyHavoc: MSVC++ 2008 x86: cast truncates constant value
#pragma warning(disable : 4245) // LadyHavoc: MSVC++ 2008 x86: 'initializing' : conversion from 'int' to 'unsigned char', signed/unsigned mismatch
#pragma warning(disable : 4204) // LadyHavoc: MSVC++ 2008 x86: nonstandard extension used : non-constant aggregate initializer
//#pragma warning(disable : 4267) // LadyHavoc: MSVC++ 2008 x64, conversion from 'size_t' to 'int', possible loss of data
//#pragma warning(disable : 4244) // LadyHavoc: MSVC++ 4 x86, double/float
//#pragma warning(disable : 4305) // LadyHavoc: MSVC++ 6 x86, double/float
//#pragma warning(disable : 4706) // LadyHavoc: MSVC++ 2008 x86, assignment within conditional expression
//#pragma warning(disable : 4127) // LadyHavoc: MSVC++ 2008 x86, conditional expression is constant
//#pragma warning(disable : 4100) // LadyHavoc: MSVC++ 2008 x86, unreferenced formal parameter
//#pragma warning(disable : 4055) // LadyHavoc: MSVC++ 2008 x86, 'type cast' from data pointer   to function pointer
//#pragma warning(disable : 4054) // LadyHavoc: MSVC++ 2008 x86, 'type cast' from function pointer   to data pointer
#endif //_MSC_VER


//====================================================

#ifndef USE_GLES2
// this is defined if the SDL_opengl.h is included
#ifndef GL_ZERO
// on Windows this is WINAPI
#ifndef APIENTRY
#define APIENTRY
#endif //APIENTRY

// for platforms (wgl) that do not use GLAPIENTRY
#ifndef GLAPIENTRY
#define GLAPIENTRY APIENTRY
#endif //GLAPIENTRY

typedef unsigned int GLenum;
typedef unsigned char GLboolean;
typedef unsigned int GLbitfield;
typedef void GLvoid;
typedef signed char GLbyte;
typedef short GLshort;
typedef int GLint;
typedef unsigned char GLubyte;
typedef unsigned short GLushort;
typedef unsigned int GLuint;
typedef int GLsizei;
typedef float GLfloat;
typedef float GLclampf;
typedef double GLdouble;
typedef double GLclampd;
typedef char GLchar;
typedef ptrdiff_t GLintptr;
typedef ptrdiff_t GLsizeiptr;
typedef void (GLAPIENTRY *GLDEBUGPROCARB)(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* message, const GLvoid* userParam);

#define GL_STEREO					0x0C33
#define GL_DONT_CARE				0x1100
#define GL_FASTEST					0x1101
#define GL_NICEST					0x1102
#define GL_DEPTH_TEST				0x0B71
#define GL_CULL_FACE				0x0B44
#define GL_BLEND				0x0BE2

#define GL_ZERO					0x0
#define GL_ONE					0x1
#define GL_SRC_COLOR				0x0300
#define GL_ONE_MINUS_SRC_COLOR			0x0301
#define GL_DST_COLOR				0x0306
#define GL_ONE_MINUS_DST_COLOR			0x0307
#define GL_SRC_ALPHA				0x0302
#define GL_ONE_MINUS_SRC_ALPHA			0x0303
#define GL_DST_ALPHA				0x0304
#define GL_ONE_MINUS_DST_ALPHA			0x0305
#define GL_SRC_ALPHA_SATURATE			0x0308
#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_TEXTURE_2D				0x0DE1
#define GL_TEXTURE_WRAP_S			0x2802
#define GL_TEXTURE_WRAP_T			0x2803
#define GL_TEXTURE_WRAP_R			0x8072
#define GL_TEXTURE_MAG_FILTER			0x2800
#define GL_TEXTURE_MIN_FILTER			0x2801
#define GL_PACK_ALIGNMENT			0x0D05
#define GL_UNPACK_ALIGNMENT			0x0CF5
#define GL_TEXTURE_INTERNAL_FORMAT		0x1003
#define GL_TEXTURE_MAX_LEVEL			0x813D

#define GL_NEAREST				0x2600
#define GL_LINEAR				0x2601
#define GL_NEAREST_MIPMAP_NEAREST		0x2700
#define GL_NEAREST_MIPMAP_LINEAR		0x2702
#define GL_LINEAR_MIPMAP_NEAREST		0x2701
#define GL_LINEAR_MIPMAP_LINEAR			0x2703

#define GL_LINE					0x1B01
#define GL_FILL					0x1B02

#define GL_REPEAT				0x2901
#define GL_CLAMP				0x2900

#define GL_TRIANGLES			0x0004

#define GL_FALSE				0x0
#define GL_TRUE					0x1

#define GL_BYTE					0x1400
#define GL_UNSIGNED_BYTE			0x1401
#define GL_SHORT				0x1402
#define GL_UNSIGNED_SHORT			0x1403
#define GL_INT					0x1404
#define GL_UNSIGNED_INT				0x1405
#define GL_FLOAT				0x1406
#define GL_DOUBLE				0x140A

#define GL_NONE					0
#define GL_FRONT_LEFT			0x0400
#define GL_FRONT_RIGHT			0x0401
#define GL_BACK_LEFT			0x0402
#define GL_BACK_RIGHT			0x0403
#define GL_FRONT				0x0404
#define GL_BACK					0x0405
#define GL_LEFT					0x0406
#define GL_RIGHT				0x0407
#define GL_FRONT_AND_BACK		0x0408

#define GL_VENDOR				0x1F00
#define GL_RENDERER				0x1F01
#define GL_VERSION				0x1F02
#define GL_EXTENSIONS				0x1F03

#define GL_NO_ERROR 				0x0
#define GL_INVALID_VALUE			0x0501
#define GL_INVALID_ENUM				0x0500
#define GL_INVALID_OPERATION			0x0502
#define GL_STACK_OVERFLOW			0x0503
#define GL_STACK_UNDERFLOW			0x0504
#define GL_OUT_OF_MEMORY			0x0505

#define GL_DITHER				0x0BD0
#define GL_ALPHA				0x1906
#define GL_RGB					0x1907
#define GL_RGBA					0x1908

#define GL_MAX_TEXTURE_SIZE			0x0D33

#define GL_NEVER				0x0200
#define GL_LESS					0x0201
#define GL_EQUAL				0x0202
#define GL_LEQUAL				0x0203
#define GL_GREATER				0x0204
#define GL_NOTEQUAL				0x0205
#define GL_GEQUAL				0x0206
#define GL_ALWAYS				0x0207
#define GL_DEPTH_TEST				0x0B71

#define GL_DEPTH_BUFFER_BIT			0x00000100
#define GL_STENCIL_BUFFER_BIT			0x00000400
#define GL_COLOR_BUFFER_BIT			0x00004000

#define GL_STENCIL_TEST				0x0B90
#define GL_KEEP					0x1E00
#define GL_REPLACE				0x1E01
#define GL_INCR					0x1E02
#define GL_DECR					0x1E03

#define GL_POLYGON_OFFSET_FACTOR          0x8038
#define GL_POLYGON_OFFSET_UNITS           0x2A00
#define GL_POLYGON_OFFSET_POINT           0x2A01
#define GL_POLYGON_OFFSET_LINE            0x2A02
#define GL_POLYGON_OFFSET_FILL            0x8037

#define GL_CLIP_PLANE0                    0x3000
#define GL_CLIP_PLANE1                    0x3001
#define GL_CLIP_PLANE2                    0x3002
#define GL_CLIP_PLANE3                    0x3003
#define GL_CLIP_PLANE4                    0x3004
#define GL_CLIP_PLANE5                    0x3005

#define GL_DEPTH_COMPONENT                0x1902
#define GL_VIEWPORT                       0x0BA2
#define GL_DRAW_BUFFER                    0x0C01
#define GL_READ_BUFFER                    0x0C02
#define GL_LUMINANCE                      0x1909
#define GL_INTENSITY                      0x8049

#define GL_TEXTURE_MAX_ANISOTROPY_EXT       0x84FE
#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT   0x84FF

#define GL_DEPTH_COMPONENT16          0x81A5
#define GL_DEPTH_COMPONENT24          0x81A6
#define GL_DEPTH_COMPONENT32          0x81A7
#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

#define GL_ACTIVE_TEXTURE			0x84E0
#define GL_MAX_TEXTURE_UNITS		0x84E2
#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_MAX_ELEMENTS_VERTICES		0x80E8
#define GL_MAX_ELEMENTS_INDICES			0x80E9

#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_PROXY_TEXTURE_3D			0x8070
#define GL_TEXTURE_DEPTH			0x8071
#define GL_TEXTURE_WRAP_R			0x8072
#define GL_MAX_3D_TEXTURE_SIZE			0x8073
#define GL_TEXTURE_BINDING_3D			0x806A

#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_SCISSOR_TEST				0x0C11
#define GL_SCISSOR_BOX				0x0C10

#define GL_CLAMP_TO_EDGE 0x812F

#define GL_FUNC_ADD                   0x8006 // also supplied by GL_blend_subtract
#define GL_MIN                        0x8007
#define GL_MAX                        0x8008
#define GL_BLEND_EQUATION             0x8009 // also supplied by GL_blend_subtract

#define GL_FUNC_SUBTRACT              0x800A
#define GL_FUNC_REVERSE_SUBTRACT      0x800B

#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_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_READ_ONLY                  0x88B8
#define GL_WRITE_ONLY                 0x88B9
#define GL_READ_WRITE                 0x88BA
#define GL_BUFFER_SIZE                0x8764
#define GL_BUFFER_USAGE               0x8765
#define GL_BUFFER_ACCESS              0x88BB
#define GL_BUFFER_MAPPED              0x88BC
#define GL_BUFFER_MAP_POINTER         0x88BD

#define GL_FRAMEBUFFER                     0x8D40
#define GL_READ_FRAMEBUFFER                0x8CA8
#define GL_DRAW_FRAMEBUFFER                0x8CA9
#define GL_RENDERBUFFER                    0x8D41
#define GL_STENCIL_INDEX1                  0x8D46
#define GL_STENCIL_INDEX4                  0x8D47
#define GL_STENCIL_INDEX8                  0x8D48
#define GL_STENCIL_INDEX16                 0x8D49
#define GL_RENDERBUFFER_WIDTH              0x8D42
#define GL_RENDERBUFFER_HEIGHT             0x8D43
#define GL_RENDERBUFFER_INTERNAL_FORMAT    0x8D44
#define GL_RENDERBUFFER_RED_SIZE           0x8D50
#define GL_RENDERBUFFER_GREEN_SIZE         0x8D51
#define GL_RENDERBUFFER_BLUE_SIZE          0x8D52
#define GL_RENDERBUFFER_ALPHA_SIZE         0x8D53
#define GL_RENDERBUFFER_DEPTH_SIZE         0x8D54
#define GL_RENDERBUFFER_STENCIL_SIZE       0x8D55
#define GL_RENDERBUFFER_SAMPLES            0x8CAB
#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE            0x8CD0
#define GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME            0x8CD1
#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL          0x8CD2
#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE  0x8CD3
#define GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER          0x8CD4
#define GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING         0x8210
#define GL_FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE         0x8211
#define GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE               0x8212
#define GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE             0x8213
#define GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE              0x8214
#define GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE             0x8215
#define GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE             0x8216
#define GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE           0x8217
#define GL_SRGB                                          0x8C40
#define GL_UNSIGNED_NORMALIZED                           0x8C17
#define GL_FRAMEBUFFER_DEFAULT                           0x8218
#define GL_INDEX                                         0x8222
#define GL_DEPTH_ATTACHMENT                 0x8D00
#define GL_STENCIL_ATTACHMENT               0x8D20
#define GL_DEPTH_STENCIL_ATTACHMENT         0x821A
#define GL_MAX_SAMPLES                     0x8D57
#define GL_FRAMEBUFFER_COMPLETE                          0x8CD5
#define GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT             0x8CD6
#define GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT     0x8CD7
#define GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER            0x8CDB
#define GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER            0x8CDC
#define GL_FRAMEBUFFER_UNSUPPORTED                       0x8CDD
#define GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE            0x8D56
#define GL_FRAMEBUFFER_UNDEFINED                         0x8219
#define GL_FRAMEBUFFER_BINDING             0x8CA6 // alias DRAW_FRAMEBUFFER_BINDING
#define GL_DRAW_FRAMEBUFFER_BINDING        0x8CA6
#define GL_READ_FRAMEBUFFER_BINDING        0x8CAA
#define GL_RENDERBUFFER_BINDING            0x8CA7
#define GL_MAX_COLOR_ATTACHMENTS           0x8CDF
#define GL_MAX_RENDERBUFFER_SIZE           0x84E8
#define GL_INVALID_FRAMEBUFFER_OPERATION   0x0506
#define GL_DEPTH_STENCIL                              0x84F9
#define GL_UNSIGNED_INT_24_8                          0x84FA
#define GL_DEPTH24_STENCIL8                           0x88F0
#define GL_TEXTURE_STENCIL_SIZE                       0x88F1

#define GL_MAX_DRAW_BUFFERS                              0x8824
#define GL_DRAW_BUFFER0                                  0x8825
#define GL_DRAW_BUFFER1                                  0x8826
#define GL_DRAW_BUFFER2                                  0x8827
#define GL_DRAW_BUFFER3                                  0x8828
#define GL_DRAW_BUFFER4                                  0x8829
#define GL_DRAW_BUFFER5                                  0x882A
#define GL_DRAW_BUFFER6                                  0x882B
#define GL_DRAW_BUFFER7                                  0x882C
#define GL_DRAW_BUFFER8                                  0x882D
#define GL_DRAW_BUFFER9                                  0x882E
#define GL_DRAW_BUFFER10                                 0x882F
#define GL_DRAW_BUFFER11                                 0x8830
#define GL_DRAW_BUFFER12                                 0x8831
#define GL_DRAW_BUFFER13                                 0x8832
#define GL_DRAW_BUFFER14                                 0x8833
#define GL_DRAW_BUFFER15                                 0x8834


#define GL_SRGB                                          0x8C40
#define GL_SRGB8                                         0x8C41
#define GL_SRGB_ALPHA                                    0x8C42
#define GL_SRGB8_ALPHA8                                  0x8C43
#define GL_SLUMINANCE_ALPHA                              0x8C44
#define GL_SLUMINANCE8_ALPHA8                            0x8C45
#define GL_SLUMINANCE                                    0x8C46
#define GL_SLUMINANCE8                                   0x8C47
#define GL_COMPRESSED_SRGB                               0x8C48
#define GL_COMPRESSED_SRGB_ALPHA                         0x8C49
#define GL_COMPRESSED_SLUMINANCE                         0x8C4A
#define GL_COMPRESSED_SLUMINANCE_ALPHA                   0x8C4B
#define GL_COMPRESSED_SRGB_S3TC_DXT1_EXT                     0x8C4C
#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT               0x8C4D
#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT               0x8C4E
#define GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT               0x8C4F

#define GL_UNIFORM_BUFFER                                    0x8A11
#define GL_UNIFORM_BUFFER_BINDING                            0x8A28
#define GL_UNIFORM_BUFFER_START                              0x8A29
#define GL_UNIFORM_BUFFER_SIZE                               0x8A2A
#define GL_MAX_VERTEX_UNIFORM_BLOCKS                         0x8A2B
#define GL_MAX_GEOMETRY_UNIFORM_BLOCKS                       0x8A2C
#define GL_MAX_FRAGMENT_UNIFORM_BLOCKS                       0x8A2D
#define GL_MAX_COMBINED_UNIFORM_BLOCKS                       0x8A2E
#define GL_MAX_UNIFORM_BUFFER_BINDINGS                       0x8A2F
#define GL_MAX_UNIFORM_BLOCK_SIZE                            0x8A30
#define GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS            0x8A31
#define GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS          0x8A32
#define GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS          0x8A33
#define GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT                   0x8A34
#define GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH              0x8A35
#define GL_ACTIVE_UNIFORM_BLOCKS                             0x8A36
#define GL_UNIFORM_TYPE                                      0x8A37
#define GL_UNIFORM_SIZE                                      0x8A38
#define GL_UNIFORM_NAME_LENGTH                               0x8A39
#define GL_UNIFORM_BLOCK_INDEX                               0x8A3A
#define GL_UNIFORM_OFFSET                                    0x8A3B
#define GL_UNIFORM_ARRAY_STRIDE                              0x8A3C
#define GL_UNIFORM_MATRIX_STRIDE                             0x8A3D
#define GL_UNIFORM_IS_ROW_MAJOR                              0x8A3E
#define GL_UNIFORM_BLOCK_BINDING                             0x8A3F
#define GL_UNIFORM_BLOCK_DATA_SIZE                           0x8A40
#define GL_UNIFORM_BLOCK_NAME_LENGTH                         0x8A41
#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS                     0x8A42
#define GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES              0x8A43
#define GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER         0x8A44
#define GL_UNIFORM_BLOCK_REFERENCED_BY_GEOMETRY_SHADER       0x8A45
#define GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER       0x8A46
#define GL_INVALID_INDEX                                     0xFFFFFFFFu

#define GL_PROGRAM_OBJECT					0x8B40
#define GL_DELETE_STATUS					0x8B80
#define GL_COMPILE_STATUS					0x8B81
#define GL_LINK_STATUS						0x8B82
#define GL_VALIDATE_STATUS					0x8B83
#define GL_INFO_LOG_LENGTH					0x8B84
#define GL_ATTACHED_SHADERS					0x8B85
#define GL_ACTIVE_UNIFORMS					0x8B86
#define GL_ACTIVE_UNIFORM_MAX_LENGTH		0x8B87
#define GL_SHADER_SOURCE_LENGTH				0x8B88
#define GL_SHADER_OBJECT					0x8B48
#define GL_SHADER_TYPE						0x8B4F
#define GL_FLOAT							0x1406
#define GL_FLOAT_VEC2						0x8B50
#define GL_FLOAT_VEC3						0x8B51
#define GL_FLOAT_VEC4						0x8B52
#define GL_INT								0x1404
#define GL_INT_VEC2							0x8B53
#define GL_INT_VEC3							0x8B54
#define GL_INT_VEC4							0x8B55
#define GL_BOOL								0x8B56
#define GL_BOOL_VEC2						0x8B57
#define GL_BOOL_VEC3						0x8B58
#define GL_BOOL_VEC4						0x8B59
#define GL_FLOAT_MAT2						0x8B5A
#define GL_FLOAT_MAT3						0x8B5B
#define GL_FLOAT_MAT4						0x8B5C
#define GL_SAMPLER_1D						0x8B5D
#define GL_SAMPLER_2D						0x8B5E
#define GL_SAMPLER_3D						0x8B5F
#define GL_SAMPLER_CUBE						0x8B60
#define GL_SAMPLER_1D_SHADOW				0x8B61
#define GL_SAMPLER_2D_SHADOW				0x8B62
#define GL_SAMPLER_2D_RECT					0x8B63
#define GL_SAMPLER_2D_RECT_SHADOW			0x8B64

#define GL_VERTEX_SHADER						0x8B31
#define GL_MAX_VERTEX_UNIFORM_COMPONENTS		0x8B4A
#define GL_MAX_VARYING_FLOATS					0x8B4B
#define GL_MAX_VERTEX_ATTRIBS					0x8869
#define GL_MAX_TEXTURE_IMAGE_UNITS				0x8872
#define GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS		0x8B4C
#define GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS		0x8B4D
#define GL_MAX_TEXTURE_COORDS					0x8871
#define GL_VERTEX_PROGRAM_POINT_SIZE			0x8642
#define GL_VERTEX_PROGRAM_TWO_SIDE				0x8643
#define GL_ACTIVE_ATTRIBUTES					0x8B89
#define GL_ACTIVE_ATTRIBUTE_MAX_LENGTH			0x8B8A
#define GL_VERTEX_ATTRIB_ARRAY_ENABLED			0x8622
#define GL_VERTEX_ATTRIB_ARRAY_SIZE				0x8623
#define GL_VERTEX_ATTRIB_ARRAY_STRIDE			0x8624
#define GL_VERTEX_ATTRIB_ARRAY_TYPE				0x8625
#define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED		0x886A
#define GL_CURRENT_VERTEX_ATTRIB				0x8626
#define GL_VERTEX_ATTRIB_ARRAY_POINTER			0x8645
#define GL_FLOAT								0x1406
#define GL_FLOAT_VEC2							0x8B50
#define GL_FLOAT_VEC3							0x8B51
#define GL_FLOAT_VEC4							0x8B52
#define GL_FLOAT_MAT2							0x8B5A
#define GL_FLOAT_MAT3							0x8B5B
#define GL_FLOAT_MAT4							0x8B5C

#define GL_FRAGMENT_SHADER						0x8B30
#define GL_MAX_FRAGMENT_UNIFORM_COMPONENTS		0x8B49
#define GL_MAX_TEXTURE_COORDS					0x8871
#define GL_MAX_TEXTURE_IMAGE_UNITS				0x8872
#define GL_FRAGMENT_SHADER_DERIVATIVE_HINT		0x8B8B

#define GL_SHADING_LANGUAGE_VERSION				0x8B8C

#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_COMPRESSED_RGB_S3TC_DXT1_EXT                   0x83F0
#define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT                  0x83F1
#define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT                  0x83F2
#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT                  0x83F3

#define GL_SAMPLES_PASSED                             0x8914
#define GL_QUERY_COUNTER_BITS                         0x8864
#define GL_CURRENT_QUERY                              0x8865
#define GL_QUERY_RESULT                               0x8866
#define GL_QUERY_RESULT_AVAILABLE                     0x8867

#define GL_QUERY_BUFFER                               0x9192
#define GL_QUERY_BUFFER_BINDING                       0x9193
#define GL_QUERY_RESULT_NO_WAIT                       0x9194
#define GL_QUERY_BUFFER_BARRIER_BIT                   0x00008000

#define GL_BGR					0x80E0
#define GL_BGRA					0x80E1

#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_DEPTH_STENCIL            0x84F9
#define GL_UNSIGNED_INT_24_8        0x84FA
#define GL_DEPTH24_STENCIL8         0x88F0

#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_DEBUG_OUTPUT_SYNCHRONOUS_ARB   0x8242
#define GL_DEBUG_NEXT_LOGGED_MESSAGE_LENGTH_ARB 0x8243
#define GL_DEBUG_CALLBACK_FUNCTION_ARB    0x8244
#define GL_DEBUG_CALLBACK_USER_PARAM_ARB  0x8245
#define GL_DEBUG_SOURCE_API_ARB           0x8246
#define GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB 0x8247
#define GL_DEBUG_SOURCE_SHADER_COMPILER_ARB 0x8248
#define GL_DEBUG_SOURCE_THIRD_PARTY_ARB   0x8249
#define GL_DEBUG_SOURCE_APPLICATION_ARB   0x824A
#define GL_DEBUG_SOURCE_OTHER_ARB         0x824B
#define GL_DEBUG_TYPE_ERROR_ARB           0x824C
#define GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB 0x824D
#define GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB 0x824E
#define GL_DEBUG_TYPE_PORTABILITY_ARB     0x824F
#define GL_DEBUG_TYPE_PERFORMANCE_ARB     0x8250
#define GL_DEBUG_TYPE_OTHER_ARB           0x8251
#define GL_MAX_DEBUG_MESSAGE_LENGTH_ARB   0x9143
#define GL_MAX_DEBUG_LOGGED_MESSAGES_ARB  0x9144
#define GL_DEBUG_LOGGED_MESSAGES_ARB      0x9145
#define GL_DEBUG_SEVERITY_HIGH_ARB        0x9146
#define GL_DEBUG_SEVERITY_MEDIUM_ARB      0x9147
#define GL_DEBUG_SEVERITY_LOW_ARB         0x9148

#endif //GL_ZERO

extern GLboolean(GLAPIENTRY *qglIsBuffer) (GLuint buffer);
extern GLboolean(GLAPIENTRY *qglIsEnabled)(GLenum cap);
extern GLboolean(GLAPIENTRY *qglIsFramebuffer)(GLuint framebuffer);
extern GLboolean(GLAPIENTRY *qglIsQuery)(GLuint qid);
extern GLboolean(GLAPIENTRY *qglIsRenderbuffer)(GLuint renderbuffer);
extern GLboolean(GLAPIENTRY *qglUnmapBuffer) (GLenum target);
extern GLenum(GLAPIENTRY *qglCheckFramebufferStatus)(GLenum target);
extern GLenum(GLAPIENTRY *qglGetError)(void);
extern GLint(GLAPIENTRY *qglGetAttribLocation)(GLuint programObj, const GLchar *name);
extern GLint(GLAPIENTRY *qglGetUniformLocation)(GLuint programObj, const GLchar *name);
extern GLuint(GLAPIENTRY *qglCreateProgram)(void);
extern GLuint(GLAPIENTRY *qglCreateShader)(GLenum shaderType);
extern GLuint(GLAPIENTRY *qglGetDebugMessageLogARB)(GLuint count, GLsizei bufSize, GLenum* sources, GLenum* types, GLuint* ids, GLenum* severities, GLsizei* lengths, GLchar* messageLog);
extern GLuint(GLAPIENTRY *qglGetUniformBlockIndex)(GLuint program, const char* uniformBlockName);
extern GLvoid(GLAPIENTRY *qglBindFramebuffer)(GLenum target, GLuint framebuffer);
extern GLvoid(GLAPIENTRY *qglBindRenderbuffer)(GLenum target, GLuint renderbuffer);
extern GLvoid(GLAPIENTRY *qglBlitFramebuffer)(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
extern GLvoid(GLAPIENTRY *qglDeleteFramebuffers)(GLsizei n, const GLuint *framebuffers);
extern GLvoid(GLAPIENTRY *qglDeleteRenderbuffers)(GLsizei n, const GLuint *renderbuffers);
extern GLvoid(GLAPIENTRY *qglFramebufferRenderbuffer)(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
extern GLvoid(GLAPIENTRY *qglFramebufferTexture1D)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
extern GLvoid(GLAPIENTRY *qglFramebufferTexture2D)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
extern GLvoid(GLAPIENTRY *qglFramebufferTexture3D)(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level, GLint layer);
extern GLvoid(GLAPIENTRY *qglFramebufferTextureLayer)(GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer);
extern GLvoid(GLAPIENTRY *qglGenFramebuffers)(GLsizei n, GLuint *framebuffers);
extern GLvoid(GLAPIENTRY *qglGenRenderbuffers)(GLsizei n, GLuint *renderbuffers);
extern GLvoid(GLAPIENTRY *qglGenerateMipmap)(GLenum target);
extern GLvoid(GLAPIENTRY *qglGetFramebufferAttachmentParameteriv)(GLenum target, GLenum attachment, GLenum pname, GLint *params);
extern GLvoid(GLAPIENTRY *qglGetRenderbufferParameteriv)(GLenum target, GLenum pname, GLint *params);
extern GLvoid(GLAPIENTRY *qglRenderbufferStorage)(GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
extern GLvoid(GLAPIENTRY *qglRenderbufferStorageMultisample)(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height);
extern GLvoid* (GLAPIENTRY *qglMapBuffer) (GLenum target, GLenum access);
extern const GLubyte* (GLAPIENTRY *qglGetString)(GLenum name);
extern void (GLAPIENTRY *qglActiveTexture)(GLenum texture);
extern void (GLAPIENTRY *qglAttachShader)(GLuint containerObj, GLuint obj);
extern void (GLAPIENTRY *qglBeginQuery)(GLenum target, GLuint qid);
extern void (GLAPIENTRY *qglBindAttribLocation)(GLuint programObj, GLuint index, const GLchar *name);
extern void (GLAPIENTRY *qglBindBuffer) (GLenum target, GLuint buffer);
extern void (GLAPIENTRY *qglBindBufferBase)(GLenum target, GLuint index, GLuint buffer);
extern void (GLAPIENTRY *qglBindBufferRange)(GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size);
extern void (GLAPIENTRY *qglBindFragDataLocation)(GLuint programObj, GLuint index, const GLchar *name);
extern void (GLAPIENTRY *qglBindTexture)(GLenum target, GLuint texture);
extern void (GLAPIENTRY *qglBindVertexArray)(GLuint array);
extern void (GLAPIENTRY *qglBlendEquation)(GLenum); // also supplied by GL_blend_subtract
extern void (GLAPIENTRY *qglBlendFunc)(GLenum sfactor, GLenum dfactor);
extern void (GLAPIENTRY *qglBlendFuncSeparate)(GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha);
extern void (GLAPIENTRY *qglBufferData) (GLenum target, GLsizeiptr size, const GLvoid *data, GLenum usage);
extern void (GLAPIENTRY *qglBufferSubData) (GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid *data);
extern void (GLAPIENTRY *qglClear)(GLbitfield mask);
extern void (GLAPIENTRY *qglClearColor)(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
extern void (GLAPIENTRY *qglClearDepth)(GLclampd depth);
extern void (GLAPIENTRY *qglClearStencil)(GLint s);
extern void (GLAPIENTRY *qglColorMask)(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
extern void (GLAPIENTRY *qglCompileShader)(GLuint shaderObj);
extern void (GLAPIENTRY *qglCompressedTexImage2D)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const void *data);
extern void (GLAPIENTRY *qglCompressedTexImage3D)(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLsizei imageSize, const void *data);
extern void (GLAPIENTRY *qglCompressedTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *data);
extern void (GLAPIENTRY *qglCompressedTexSubImage3D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *data);
extern void (GLAPIENTRY *qglCopyTexImage2D)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
extern void (GLAPIENTRY *qglCopyTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
extern void (GLAPIENTRY *qglCopyTexSubImage3D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
extern void (GLAPIENTRY *qglCullFace)(GLenum mode);
extern void (GLAPIENTRY *qglDebugMessageCallbackARB)(GLDEBUGPROCARB callback, const GLvoid* userParam);
extern void (GLAPIENTRY *qglDebugMessageControlARB)(GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint* ids, GLboolean enabled);
extern void (GLAPIENTRY *qglDebugMessageInsertARB)(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* buf);
extern void (GLAPIENTRY *qglDeleteBuffers) (GLsizei n, const GLuint *buffers);
extern void (GLAPIENTRY *qglDeleteProgram)(GLuint obj);
extern void (GLAPIENTRY *qglDeleteQueries)(GLsizei n, const GLuint *ids);
extern void (GLAPIENTRY *qglDeleteShader)(GLuint obj);
extern void (GLAPIENTRY *qglDeleteTextures)(GLsizei n, const GLuint *textures);
extern void (GLAPIENTRY *qglDeleteVertexArrays)(GLsizei n, const GLuint *arrays);
extern void (GLAPIENTRY *qglDepthFunc)(GLenum func);
extern void (GLAPIENTRY *qglDepthMask)(GLboolean flag);
extern void (GLAPIENTRY *qglDepthRange)(GLclampd near_val, GLclampd far_val);
extern void (GLAPIENTRY *qglDepthRangef)(GLclampf near_val, GLclampf far_val);
extern void (GLAPIENTRY *qglDetachShader)(GLuint containerObj, GLuint attachedObj);
extern void (GLAPIENTRY *qglDisable)(GLenum cap);
extern void (GLAPIENTRY *qglDisableVertexAttribArray)(GLuint index);
extern void (GLAPIENTRY *qglDrawArrays)(GLenum mode, GLint first, GLsizei count);
extern void (GLAPIENTRY *qglDrawBuffer)(GLenum mode);
extern void (GLAPIENTRY *qglDrawBuffers)(GLsizei n, const GLenum *bufs);
extern void (GLAPIENTRY *qglDrawElements)(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices);
extern void (GLAPIENTRY *qglEnable)(GLenum cap);
extern void (GLAPIENTRY *qglEnableVertexAttribArray)(GLuint index);
extern void (GLAPIENTRY *qglEndQuery)(GLenum target);
extern void (GLAPIENTRY *qglFinish)(void);
extern void (GLAPIENTRY *qglFlush)(void);
extern void (GLAPIENTRY *qglGenBuffers) (GLsizei n, GLuint *buffers);
extern void (GLAPIENTRY *qglGenQueries)(GLsizei n, GLuint *ids);
extern void (GLAPIENTRY *qglGenTextures)(GLsizei n, GLuint *textures);
extern void (GLAPIENTRY *qglGenVertexArrays)(GLsizei n, GLuint *arrays);
extern void (GLAPIENTRY *qglGetActiveAttrib)(GLuint programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
extern void (GLAPIENTRY *qglGetActiveUniform)(GLuint programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLchar *name);
extern void (GLAPIENTRY *qglGetActiveUniformBlockName)(GLuint program, GLuint uniformBlockIndex, GLsizei bufSize, GLsizei* length, char* uniformBlockName);
extern void (GLAPIENTRY *qglGetActiveUniformBlockiv)(GLuint program, GLuint uniformBlockIndex, GLenum pname, GLint* params);
extern void (GLAPIENTRY *qglGetActiveUniformName)(GLuint program, GLuint uniformIndex, GLsizei bufSize, GLsizei* length, char* uniformName);
extern void (GLAPIENTRY *qglGetActiveUniformsiv)(GLuint program, GLsizei uniformCount, const GLuint* uniformIndices, GLenum pname, GLint* params);
extern void (GLAPIENTRY *qglGetAttachedShaders)(GLuint containerObj, GLsizei maxCount, GLsizei *count, GLuint *obj);
extern void (GLAPIENTRY *qglGetBooleanv)(GLenum pname, GLboolean *params);
extern void (GLAPIENTRY *qglGetCompressedTexImage)(GLenum target, GLint lod, void *img);
extern void (GLAPIENTRY *qglGetDoublev)(GLenum pname, GLdouble *params);
extern void (GLAPIENTRY *qglGetFloatv)(GLenum pname, GLfloat *params);
extern void (GLAPIENTRY *qglGetIntegeri_v)(GLenum target, GLuint index, GLint* data);
extern void (GLAPIENTRY *qglGetIntegerv)(GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglGetPointerv)(GLenum pname, GLvoid** params);
extern void (GLAPIENTRY *qglGetProgramInfoLog)(GLuint obj, GLsizei maxLength, GLsizei *length, GLchar *infoLog);
extern void (GLAPIENTRY *qglGetProgramiv)(GLuint obj, GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglGetQueryObjectiv)(GLuint qid, GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglGetQueryObjectuiv)(GLuint qid, GLenum pname, GLuint *params);
extern void (GLAPIENTRY *qglGetQueryiv)(GLenum target, GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglGetShaderInfoLog)(GLuint obj, GLsizei maxLength, GLsizei *length, GLchar *infoLog);
extern void (GLAPIENTRY *qglGetShaderSource)(GLuint obj, GLsizei maxLength, GLsizei *length, GLchar *source);
extern void (GLAPIENTRY *qglGetShaderiv)(GLuint obj, GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglGetTexImage)(GLenum target, GLint level, GLenum format, GLenum type, GLvoid *pixels);
extern void (GLAPIENTRY *qglGetTexLevelParameterfv)(GLenum target, GLint level, GLenum pname, GLfloat *params);
extern void (GLAPIENTRY *qglGetTexLevelParameteriv)(GLenum target, GLint level, GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglGetTexParameterfv)(GLenum target, GLenum pname, GLfloat *params);
extern void (GLAPIENTRY *qglGetTexParameteriv)(GLenum target, GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglGetUniformIndices)(GLuint program, GLsizei uniformCount, const char** uniformNames, GLuint* uniformIndices);
extern void (GLAPIENTRY *qglGetUniformfv)(GLuint programObj, GLint location, GLfloat *params);
extern void (GLAPIENTRY *qglGetUniformiv)(GLuint programObj, GLint location, GLint *params);
extern void (GLAPIENTRY *qglGetVertexAttribPointerv)(GLuint index, GLenum pname, GLvoid **pointer);
extern void (GLAPIENTRY *qglGetVertexAttribdv)(GLuint index, GLenum pname, GLdouble *params);
extern void (GLAPIENTRY *qglGetVertexAttribfv)(GLuint index, GLenum pname, GLfloat *params);
extern void (GLAPIENTRY *qglGetVertexAttribiv)(GLuint index, GLenum pname, GLint *params);
extern void (GLAPIENTRY *qglHint)(GLenum target, GLenum mode);
extern void (GLAPIENTRY *qglLinkProgram)(GLuint programObj);
extern void (GLAPIENTRY *qglPixelStorei)(GLenum pname, GLint param);
extern void (GLAPIENTRY *qglPointSize)(GLfloat size);
extern void (GLAPIENTRY *qglPolygonMode)(GLenum face, GLenum mode);
extern void (GLAPIENTRY *qglPolygonOffset)(GLfloat factor, GLfloat units);
extern void (GLAPIENTRY *qglReadBuffer)(GLenum mode);
extern void (GLAPIENTRY *qglReadPixels)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels);
extern void (GLAPIENTRY *qglSampleCoverage)(GLclampf value, GLboolean invert);
extern void (GLAPIENTRY *qglScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
extern void (GLAPIENTRY *qglShaderSource)(GLuint shaderObj, GLsizei count, const GLchar **string, const GLint *length);
extern void (GLAPIENTRY *qglStencilFunc)(GLenum func, GLint ref, GLuint mask);
extern void (GLAPIENTRY *qglStencilMask)(GLuint mask);
extern void (GLAPIENTRY *qglStencilOp)(GLenum fail, GLenum zfail, GLenum zpass);
extern void (GLAPIENTRY *qglTexImage2D)(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
extern void (GLAPIENTRY *qglTexImage3D)(GLenum target, GLint level, GLenum internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
extern void (GLAPIENTRY *qglTexParameterf)(GLenum target, GLenum pname, GLfloat param);
extern void (GLAPIENTRY *qglTexParameterfv)(GLenum target, GLenum pname, GLfloat *params);
extern void (GLAPIENTRY *qglTexParameteri)(GLenum target, GLenum pname, GLint param);
extern void (GLAPIENTRY *qglTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
extern void (GLAPIENTRY *qglTexSubImage3D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const GLvoid *pixels);
extern void (GLAPIENTRY *qglUniform1f)(GLint location, GLfloat v0);
extern void (GLAPIENTRY *qglUniform1fv)(GLint location, GLsizei count, const GLfloat *value);
extern void (GLAPIENTRY *qglUniform1i)(GLint location, GLint v0);
extern void (GLAPIENTRY *qglUniform1iv)(GLint location, GLsizei count, const GLint *value);
extern void (GLAPIENTRY *qglUniform2f)(GLint location, GLfloat v0, GLfloat v1);
extern void (GLAPIENTRY *qglUniform2fv)(GLint location, GLsizei count, const GLfloat *value);
extern void (GLAPIENTRY *qglUniform2i)(GLint location, GLint v0, GLint v1);
extern void (GLAPIENTRY *qglUniform2iv)(GLint location, GLsizei count, const GLint *value);
extern void (GLAPIENTRY *qglUniform3f)(GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
extern void (GLAPIENTRY *qglUniform3fv)(GLint location, GLsizei count, const GLfloat *value);
extern void (GLAPIENTRY *qglUniform3i)(GLint location, GLint v0, GLint v1, GLint v2);
extern void (GLAPIENTRY *qglUniform3iv)(GLint location, GLsizei count, const GLint *value);
extern void (GLAPIENTRY *qglUniform4f)(GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
extern void (GLAPIENTRY *qglUniform4fv)(GLint location, GLsizei count, const GLfloat *value);
extern void (GLAPIENTRY *qglUniform4i)(GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
extern void (GLAPIENTRY *qglUniform4iv)(GLint location, GLsizei count, const GLint *value);
extern void (GLAPIENTRY *qglUniformBlockBinding)(GLuint program, GLuint uniformBlockIndex, GLuint uniformBlockBinding);
extern void (GLAPIENTRY *qglUniformMatrix2fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
extern void (GLAPIENTRY *qglUniformMatrix3fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
extern void (GLAPIENTRY *qglUniformMatrix4fv)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
extern void (GLAPIENTRY *qglUseProgram)(GLuint programObj);
extern void (GLAPIENTRY *qglValidateProgram)(GLuint programObj);
extern void (GLAPIENTRY *qglVertexAttrib1d)(GLuint index, GLdouble v0);
extern void (GLAPIENTRY *qglVertexAttrib1dv)(GLuint index, const GLdouble *v);
extern void (GLAPIENTRY *qglVertexAttrib1f)(GLuint index, GLfloat v0);
extern void (GLAPIENTRY *qglVertexAttrib1fv)(GLuint index, const GLfloat *v);
extern void (GLAPIENTRY *qglVertexAttrib1s)(GLuint index, GLshort v0);
extern void (GLAPIENTRY *qglVertexAttrib1sv)(GLuint index, const GLshort *v);
extern void (GLAPIENTRY *qglVertexAttrib2d)(GLuint index, GLdouble v0, GLdouble v1);
extern void (GLAPIENTRY *qglVertexAttrib2dv)(GLuint index, const GLdouble *v);
extern void (GLAPIENTRY *qglVertexAttrib2f)(GLuint index, GLfloat v0, GLfloat v1);
extern void (GLAPIENTRY *qglVertexAttrib2fv)(GLuint index, const GLfloat *v);
extern void (GLAPIENTRY *qglVertexAttrib2s)(GLuint index, GLshort v0, GLshort v1);
extern void (GLAPIENTRY *qglVertexAttrib2sv)(GLuint index, const GLshort *v);
extern void (GLAPIENTRY *qglVertexAttrib3d)(GLuint index, GLdouble v0, GLdouble v1, GLdouble v2);
extern void (GLAPIENTRY *qglVertexAttrib3dv)(GLuint index, const GLdouble *v);
extern void (GLAPIENTRY *qglVertexAttrib3f)(GLuint index, GLfloat v0, GLfloat v1, GLfloat v2);
extern void (GLAPIENTRY *qglVertexAttrib3fv)(GLuint index, const GLfloat *v);
extern void (GLAPIENTRY *qglVertexAttrib3s)(GLuint index, GLshort v0, GLshort v1, GLshort v2);
extern void (GLAPIENTRY *qglVertexAttrib3sv)(GLuint index, const GLshort *v);
extern void (GLAPIENTRY *qglVertexAttrib4Nbv)(GLuint index, const GLbyte *v);
extern void (GLAPIENTRY *qglVertexAttrib4Niv)(GLuint index, const GLint *v);
extern void (GLAPIENTRY *qglVertexAttrib4Nsv)(GLuint index, const GLshort *v);
extern void (GLAPIENTRY *qglVertexAttrib4Nub)(GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
extern void (GLAPIENTRY *qglVertexAttrib4Nubv)(GLuint index, const GLubyte *v);
extern void (GLAPIENTRY *qglVertexAttrib4Nuiv)(GLuint index, const GLuint *v);
extern void (GLAPIENTRY *qglVertexAttrib4Nusv)(GLuint index, const GLushort *v);
extern void (GLAPIENTRY *qglVertexAttrib4bv)(GLuint index, const GLbyte *v);
extern void (GLAPIENTRY *qglVertexAttrib4d)(GLuint index, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);
extern void (GLAPIENTRY *qglVertexAttrib4dv)(GLuint index, const GLdouble *v);
extern void (GLAPIENTRY *qglVertexAttrib4f)(GLuint index, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
extern void (GLAPIENTRY *qglVertexAttrib4fv)(GLuint index, const GLfloat *v);
extern void (GLAPIENTRY *qglVertexAttrib4iv)(GLuint index, const GLint *v);
extern void (GLAPIENTRY *qglVertexAttrib4s)(GLuint index, GLshort v0, GLshort v1, GLshort v2, GLshort v3);
extern void (GLAPIENTRY *qglVertexAttrib4sv)(GLuint index, const GLshort *v);
extern void (GLAPIENTRY *qglVertexAttrib4ubv)(GLuint index, const GLubyte *v);
extern void (GLAPIENTRY *qglVertexAttrib4uiv)(GLuint index, const GLuint *v);
extern void (GLAPIENTRY *qglVertexAttrib4usv)(GLuint index, const GLushort *v);
extern void (GLAPIENTRY *qglVertexAttribPointer)(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
extern void (GLAPIENTRY *qglViewport)(GLint x, GLint y, GLsizei width, GLsizei height);
#else
#define qglActiveTexture glActiveTexture
#define qglAttachShader glAttachShader
#define qglBeginQuery glBeginQuery
#define qglBindAttribLocation glBindAttribLocation
#define qglBindBuffer glBindBuffer
#define qglBindBufferBase glBindBufferBase
#define qglBindBufferRange glBindBufferRange
#define qglBindFragDataLocation glBindFragDataLocation
#define qglBindFramebuffer glBindFramebuffer
#define qglBindRenderbuffer glBindRenderbuffer
#define qglBindTexture glBindTexture
#define qglBlendEquation glBlendEquation
#define qglBlendFunc glBlendFunc
#define qglBlendFuncSeparate glBlendFuncSeparate
#define qglBlitFramebuffer glBlitFramebuffer
#define qglBufferData glBufferData
#define qglBufferSubData glBufferSubData
#define qglCheckFramebufferStatus glCheckFramebufferStatus
#define qglClear glClear
#define qglClearColor glClearColor
#define qglClearDepth glClearDepth
#define qglClearStencil glClearStencil
#define qglColorMask glColorMask
#define qglCompileShader glCompileShader
#define qglCompressedTexImage2D glCompressedTexImage2D
#define qglCompressedTexImage3D glCompressedTexImage3D
#define qglCompressedTexSubImage2D glCompressedTexSubImage2D
#define qglCompressedTexSubImage3D glCompressedTexSubImage3D
#define qglCopyTexImage2D glCopyTexImage2D
#define qglCopyTexSubImage2D glCopyTexSubImage2D
#define qglCopyTexSubImage3D glCopyTexSubImage3D
#define qglCreateProgram glCreateProgram
#define qglCreateShader glCreateShader
#define qglCullFace glCullFace
#define qglDebugMessageCallbackARB glDebugMessageCallbackARB
#define qglDebugMessageControlARB glDebugMessageControlARB
#define qglDebugMessageInsertARB glDebugMessageInsertARB
#define qglDeleteBuffers glDeleteBuffers
#define qglDeleteFramebuffers glDeleteFramebuffers
#define qglDeleteProgram glDeleteProgram
#define qglDeleteQueries glDeleteQueries
#define qglDeleteRenderbuffers glDeleteRenderbuffers
#define qglDeleteShader glDeleteShader
#define qglDeleteTextures glDeleteTextures
#define qglDepthFunc glDepthFunc
#define qglDepthMask glDepthMask
#define qglDepthRange glDepthRange
#define qglDepthRangef glDepthRangef
#define qglDetachShader glDetachShader
#define qglDisable glDisable
#define qglDisableVertexAttribArray glDisableVertexAttribArray
#define qglDrawArrays glDrawArrays
#define qglDrawBuffer glDrawBuffer
#define qglDrawBuffers glDrawBuffers
#define qglDrawElements glDrawElements
#define qglEnable glEnable
#define qglEnableVertexAttribArray glEnableVertexAttribArray
#define qglEndQuery glEndQuery
#define qglFinish glFinish
#define qglFlush glFlush
#define qglFramebufferRenderbuffer glFramebufferRenderbuffer
#define qglFramebufferTexture1D glFramebufferTexture1D
#define qglFramebufferTexture2D glFramebufferTexture2D
#define qglFramebufferTexture3D glFramebufferTexture3D
#define qglFramebufferTextureLayer glFramebufferTextureLayer
#define qglGenBuffers glGenBuffers
#define qglGenFramebuffers glGenFramebuffers
#define qglGenQueries glGenQueries
#define qglGenRenderbuffers glGenRenderbuffers
#define qglGenTextures glGenTextures
#define qglGenerateMipmap glGenerateMipmap
#define qglGetActiveAttrib glGetActiveAttrib
#define qglGetActiveUniform glGetActiveUniform
#define qglGetActiveUniformBlockName glGetActiveUniformBlockName
#define qglGetActiveUniformBlockiv glGetActiveUniformBlockiv
#define qglGetActiveUniformName glGetActiveUniformName
#define qglGetActiveUniformsiv glGetActiveUniformsiv
#define qglGetAttachedShaders glGetAttachedShaders
#define qglGetAttribLocation glGetAttribLocation
#define qglGetBooleanv glGetBooleanv
#define qglGetCompressedTexImage glGetCompressedTexImage
#define qglGetDebugMessageLogARB glGetDebugMessageLogARB
#define qglGetDoublev glGetDoublev
#define qglGetError glGetError
#define qglGetFloatv glGetFloatv
#define qglGetFramebufferAttachmentParameteriv glGetFramebufferAttachmentParameteriv
#define qglGetIntegeri_v glGetIntegeri_v
#define qglGetIntegerv glGetIntegerv
#define qglGetPointerv glGetPointerv
#define qglGetProgramInfoLog glGetProgramInfoLog
#define qglGetProgramiv glGetProgramiv
#define qglGetQueryObjectiv glGetQueryObjectiv
#define qglGetQueryObjectuiv glGetQueryObjectuiv
#define qglGetQueryiv glGetQueryiv
#define qglGetRenderbufferParameteriv glGetRenderbufferParameteriv
#define qglGetShaderInfoLog glGetShaderInfoLog
#define qglGetShaderSource glGetShaderSource
#define qglGetShaderiv glGetShaderiv
#define qglGetString glGetString
#define qglGetTexImage glGetTexImage
#define qglGetTexLevelParameterfv glGetTexLevelParameterfv
#define qglGetTexLevelParameteriv glGetTexLevelParameteriv
#define qglGetTexParameterfv glGetTexParameterfv
#define qglGetTexParameteriv glGetTexParameteriv
#define qglGetUniformBlockIndex glGetUniformBlockIndex
#define qglGetUniformIndices glGetUniformIndices
#define qglGetUniformLocation glGetUniformLocation
#define qglGetUniformfv glGetUniformfv
#define qglGetUniformiv glGetUniformiv
#define qglGetVertexAttribPointerv glGetVertexAttribPointerv
#define qglGetVertexAttribdv glGetVertexAttribdv
#define qglGetVertexAttribfv glGetVertexAttribfv
#define qglGetVertexAttribiv glGetVertexAttribiv
#define qglHint glHint
#define qglIsBuffer glIsBuffer
#define qglIsEnabled glIsEnabled
#define qglIsFramebuffer glIsFramebuffer
#define qglIsQuery glIsQuery
#define qglIsRenderbuffer glIsRenderbuffer
#define qglLinkProgram glLinkProgram
#define qglMapBuffer glMapBuffer
#define qglPixelStorei glPixelStorei
#define qglPointSize glPointSize
#define qglPolygonMode glPolygonMode
#define qglPolygonOffset glPolygonOffset
#define qglReadBuffer glReadBuffer
#define qglReadPixels glReadPixels
#define qglRenderbufferStorage glRenderbufferStorage
#define qglRenderbufferStorageMultisample glRenderbufferStorageMultisample
#define qglSampleCoverage glSampleCoverage
#define qglScissor glScissor
#define qglShaderSource glShaderSource
#define qglStencilFunc glStencilFunc
#define qglStencilMask glStencilMask
#define qglStencilOp glStencilOp
#define qglTexImage2D glTexImage2D
#define qglTexImage3D glTexImage3D
#define qglTexParameterf glTexParameterf
#define qglTexParameterfv glTexParameterfv
#define qglTexParameteri glTexParameteri
#define qglTexSubImage2D glTexSubImage2D
#define qglTexSubImage3D glTexSubImage3D
#define qglUniform1f glUniform1f
#define qglUniform1fv glUniform1fv
#define qglUniform1i glUniform1i
#define qglUniform1iv glUniform1iv
#define qglUniform2f glUniform2f
#define qglUniform2fv glUniform2fv
#define qglUniform2i glUniform2i
#define qglUniform2iv glUniform2iv
#define qglUniform3f glUniform3f
#define qglUniform3fv glUniform3fv
#define qglUniform3i glUniform3i
#define qglUniform3iv glUniform3iv
#define qglUniform4f glUniform4f
#define qglUniform4fv glUniform4fv
#define qglUniform4i glUniform4i
#define qglUniform4iv glUniform4iv
#define qglUniformBlockBinding glUniformBlockBinding
#define qglUniformMatrix2fv glUniformMatrix2fv
#define qglUniformMatrix3fv glUniformMatrix3fv
#define qglUniformMatrix4fv glUniformMatrix4fv
#define qglUnmapBuffer glUnmapBuffer
#define qglUseProgram glUseProgram
#define qglValidateProgram glValidateProgram
#define qglVertexAttrib1d glVertexAttrib1d
#define qglVertexAttrib1dv glVertexAttrib1dv
#define qglVertexAttrib1f glVertexAttrib1f
#define qglVertexAttrib1fv glVertexAttrib1fv
#define qglVertexAttrib1s glVertexAttrib1s
#define qglVertexAttrib1sv glVertexAttrib1sv
#define qglVertexAttrib2d glVertexAttrib2d
#define qglVertexAttrib2dv glVertexAttrib2dv
#define qglVertexAttrib2f glVertexAttrib2f
#define qglVertexAttrib2fv glVertexAttrib2fv
#define qglVertexAttrib2s glVertexAttrib2s
#define qglVertexAttrib2sv glVertexAttrib2sv
#define qglVertexAttrib3d glVertexAttrib3d
#define qglVertexAttrib3dv glVertexAttrib3dv
#define qglVertexAttrib3f glVertexAttrib3f
#define qglVertexAttrib3fv glVertexAttrib3fv
#define qglVertexAttrib3s glVertexAttrib3s
#define qglVertexAttrib3sv glVertexAttrib3sv
#define qglVertexAttrib4Nbv glVertexAttrib4Nbv
#define qglVertexAttrib4Niv glVertexAttrib4Niv
#define qglVertexAttrib4Nsv glVertexAttrib4Nsv
#define qglVertexAttrib4Nub glVertexAttrib4Nub
#define qglVertexAttrib4Nubv glVertexAttrib4Nubv
#define qglVertexAttrib4Nuiv glVertexAttrib4Nuiv
#define qglVertexAttrib4Nusv glVertexAttrib4Nusv
#define qglVertexAttrib4bv glVertexAttrib4bv
#define qglVertexAttrib4d glVertexAttrib4d
#define qglVertexAttrib4dv glVertexAttrib4dv
#define qglVertexAttrib4f glVertexAttrib4f
#define qglVertexAttrib4fv glVertexAttrib4fv
#define qglVertexAttrib4iv glVertexAttrib4iv
#define qglVertexAttrib4s glVertexAttrib4s
#define qglVertexAttrib4sv glVertexAttrib4sv
#define qglVertexAttrib4ubv glVertexAttrib4ubv
#define qglVertexAttrib4uiv glVertexAttrib4uiv
#define qglVertexAttrib4usv glVertexAttrib4usv
#define qglVertexAttribPointer glVertexAttribPointer
#define qglViewport glViewport
#endif //USE_GLES2

#define GL_COLOR_ATTACHMENT0                0x8CE0
#define GL_COLOR_ATTACHMENT1                0x8CE1
#define GL_COLOR_ATTACHMENT2                0x8CE2
#define GL_COLOR_ATTACHMENT3                0x8CE3
#define GL_COLOR_ATTACHMENT4                0x8CE4
#define GL_COLOR_ATTACHMENT5                0x8CE5
#define GL_COLOR_ATTACHMENT6                0x8CE6
#define GL_COLOR_ATTACHMENT7                0x8CE7
#define GL_COLOR_ATTACHMENT8                0x8CE8
#define GL_COLOR_ATTACHMENT9                0x8CE9
#define GL_COLOR_ATTACHMENT10               0x8CEA
#define GL_COLOR_ATTACHMENT11               0x8CEB
#define GL_COLOR_ATTACHMENT12               0x8CEC
#define GL_COLOR_ATTACHMENT13               0x8CED
#define GL_COLOR_ATTACHMENT14               0x8CEE
#define GL_COLOR_ATTACHMENT15               0x8CEF

#define GL_RGBA32F                                       0x8814
#define GL_RGB32F                                        0x8815
#define GL_ALPHA32F                                      0x8816
#define GL_INTENSITY32F                                  0x8817
#define GL_LUMINANCE32F                                  0x8818
#define GL_LUMINANCE_ALPHA32F                            0x8819
#define GL_RGBA16F                                       0x881A
#define GL_RGB16F                                        0x881B
#define GL_ALPHA16F                                      0x881C
#define GL_INTENSITY16F                                  0x881D
#define GL_LUMINANCE16F                                  0x881E
#define GL_LUMINANCE_ALPHA16F                            0x881F

#define GL_TEXTURE_3D				0x806F

#define GL_HALF_FLOAT                                    0x140B
#define GL_NUM_EXTENSIONS                 0x821D


//====================================================

//#define DEBUGGL

#ifdef DEBUGGL
void GL_PrintError(GLenum errornumber, const char *filename, unsigned int linenumber);
#define CHECKGLERROR { \
	if (gl_paranoid.integer) { \
		GLenum gl_errornumber; \
		if (gl_printcheckerror.integer) \
			Con_Printf("CHECKGLERROR at %s:%d\n", __FILE__, __LINE__); \
		if (qglGetError) /* bones_was_here: is this pointer check still necessary? */ \
			while ((gl_errornumber = qglGetError())) \
				GL_PrintError(gl_errornumber, __FILE__, __LINE__); \
	}}
#else
#define CHECKGLERROR
#endif //DEBUGGL


#endif //GLQUAKE_H
