glquake.h

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21 #ifndef GLQUAKE_H
  22 #define GLQUAKE_H
  23
  24 // disable data conversion warnings
  25
  26 #ifdef _MSC_VER
  27 #pragma warning(disable : 4244)     // LordHavoc: MSVC++ 4 x86, double/float
  28 #pragma warning(disable : 4305)         // LordHavoc: MSVC++ 6 x86, double/float
  29 #endif
  30
  31
  32 //====================================================
  33
  34 // wgl uses APIENTRY
  35 #ifndef APIENTRY
  36 #define APIENTRY
  37 #endif
  38
  39 // for platforms (wgl) that do not use GLAPIENTRY
  40 #ifndef GLAPIENTRY
  41 #define GLAPIENTRY APIENTRY
  42 #endif
  43
  44 #ifndef GL_PROJECTION
  45 typedef unsigned int GLenum;
  46 typedef unsigned char GLboolean;
  47 typedef unsigned int GLbitfield;
  48 typedef void GLvoid;
  49 // 1-byte signed
  50 typedef signed char GLbyte;
  51 // 2-byte signed
  52 typedef short GLshort;
  53 // 4-byte signed
  54 typedef int GLint;
  55 // 1-byte unsigned
  56 typedef unsigned char GLubyte;
  57 // 2-byte unsigned
  58 typedef unsigned short GLushort;
  59 // 4-byte unsigned
  60 typedef unsigned int GLuint;
  61 // 4-byte signed
  62 typedef int GLsizei;
  63 // single precision float
  64 typedef float GLfloat;
  65 // single precision float in [0,1]
  66 typedef float GLclampf;
  67 // double precision float
  68 typedef double GLdouble;
  69 // double precision float in [0,1]
  70 typedef double GLclampd;
  71
  72 #define GL_MODELVIEW                            0x1700
  73 #define GL_PROJECTION                           0x1701
  74 #define GL_TEXTURE                              0x1702
  75 #define GL_MATRIX_MODE                          0x0BA0
  76 #define GL_MODELVIEW_MATRIX                     0x0BA6
  77 #define GL_PROJECTION_MATRIX                    0x0BA7
  78 #define GL_TEXTURE_MATRIX                       0x0BA8
  79
  80 #define GL_DEPTH_TEST                           0x0B71
  81
  82 #define GL_CULL_FACE                            0x0B44
  83
  84 #define GL_BLEND                                0x0BE2
  85
  86 #define GL_ZERO                                 0x0
  87 #define GL_ONE                                  0x1
  88 #define GL_SRC_COLOR                            0x0300
  89 #define GL_ONE_MINUS_SRC_COLOR                  0x0301
  90 #define GL_DST_COLOR                            0x0306
  91 #define GL_ONE_MINUS_DST_COLOR                  0x0307
  92 #define GL_SRC_ALPHA                            0x0302
  93 #define GL_ONE_MINUS_SRC_ALPHA                  0x0303
  94 #define GL_DST_ALPHA                            0x0304
  95 #define GL_ONE_MINUS_DST_ALPHA                  0x0305
  96 #define GL_SRC_ALPHA_SATURATE                   0x0308
  97 #define GL_CONSTANT_COLOR                       0x8001
  98 #define GL_ONE_MINUS_CONSTANT_COLOR             0x8002
  99 #define GL_CONSTANT_ALPHA                       0x8003
 100 #define GL_ONE_MINUS_CONSTANT_ALPHA             0x8004
 101
 102 #define GL_TEXTURE_ENV                          0x2300
 103 #define GL_TEXTURE_ENV_MODE                     0x2200
 104 #define GL_TEXTURE_1D                           0x0DE0
 105 #define GL_TEXTURE_2D                           0x0DE1
 106 #define GL_TEXTURE_WRAP_S                       0x2802
 107 #define GL_TEXTURE_WRAP_T                       0x2803
 108 #define GL_TEXTURE_WRAP_R                       0x8072
 109 #define GL_TEXTURE_BORDER_COLOR                 0x1004
 110 #define GL_TEXTURE_MAG_FILTER                   0x2800
 111 #define GL_TEXTURE_MIN_FILTER                   0x2801
 112 #define GL_UNPACK_ALIGNMENT                     0x0CF5
 113 #define GL_TEXTURE_BINDING_1D                   0x8068
 114 #define GL_TEXTURE_BINDING_2D                   0x8069
 115
 116 #define GL_NEAREST                              0x2600
 117 #define GL_LINEAR                               0x2601
 118 #define GL_NEAREST_MIPMAP_NEAREST               0x2700
 119 #define GL_NEAREST_MIPMAP_LINEAR                0x2702
 120 #define GL_LINEAR_MIPMAP_NEAREST                0x2701
 121 #define GL_LINEAR_MIPMAP_LINEAR                 0x2703
 122
 123 extern int gl_support_anisotropy;
 124 extern int gl_max_anisotropy;
 125 #define GL_TEXTURE_MAX_ANISOTROPY_EXT           0x84FE
 126 #define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT       0x84FF
 127
 128 #define GL_ADD                                  0x0104
 129 #define GL_DECAL                                0x2101
 130 #define GL_MODULATE                             0x2100
 131
 132 #define GL_REPEAT                               0x2901
 133 #define GL_CLAMP                                0x2900
 134
 135 #define GL_POINTS                               0x0000
 136 #define GL_LINES                                0x0001
 137 #define GL_LINE_LOOP                    0x0002
 138 #define GL_LINE_STRIP                   0x0003
 139 #define GL_TRIANGLES                    0x0004
 140 #define GL_TRIANGLE_STRIP               0x0005
 141 #define GL_TRIANGLE_FAN                 0x0006
 142 #define GL_QUADS                                0x0007
 143 #define GL_QUAD_STRIP                   0x0008
 144 #define GL_POLYGON                              0x0009
 145
 146 #define GL_FALSE                                0x0
 147 #define GL_TRUE                                 0x1
 148
 149 #define GL_BYTE                                 0x1400
 150 #define GL_UNSIGNED_BYTE                        0x1401
 151 #define GL_SHORT                                0x1402
 152 #define GL_UNSIGNED_SHORT                       0x1403
 153 #define GL_INT                                  0x1404
 154 #define GL_UNSIGNED_INT                         0x1405
 155 #define GL_FLOAT                                0x1406
 156 #define GL_DOUBLE                               0x140A
 157 #define GL_2_BYTES                              0x1407
 158 #define GL_3_BYTES                              0x1408
 159 #define GL_4_BYTES                              0x1409
 160
 161 #define GL_VERTEX_ARRAY                         0x8074
 162 #define GL_NORMAL_ARRAY                         0x8075
 163 #define GL_COLOR_ARRAY                          0x8076
 164 //#define GL_INDEX_ARRAY                                0x8077
 165 #define GL_TEXTURE_COORD_ARRAY                  0x8078
 166 //#define GL_EDGE_FLAG_ARRAY                    0x8079
 167
 168 #define GL_FRONT                                0x0404
 169 #define GL_BACK                                 0x0405
 170
 171 #define GL_VENDOR                               0x1F00
 172 #define GL_RENDERER                             0x1F01
 173 #define GL_VERSION                              0x1F02
 174 #define GL_EXTENSIONS                           0x1F03
 175
 176 #define GL_NO_ERROR                             0x0
 177 #define GL_INVALID_VALUE                        0x0501
 178 #define GL_INVALID_ENUM                         0x0500
 179 #define GL_INVALID_OPERATION                    0x0502
 180 #define GL_STACK_OVERFLOW                       0x0503
 181 #define GL_STACK_UNDERFLOW                      0x0504
 182 #define GL_OUT_OF_MEMORY                        0x0505
 183
 184 #define GL_DITHER                               0x0BD0
 185 #define GL_RGB                                  0x1907
 186 #define GL_RGBA                                 0x1908
 187
 188 #define GL_MAX_TEXTURE_SIZE                     0x0D33
 189
 190 #define GL_NEVER                                0x0200
 191 #define GL_LESS                                 0x0201
 192 #define GL_EQUAL                                0x0202
 193 #define GL_LEQUAL                               0x0203
 194 #define GL_GREATER                              0x0204
 195 #define GL_NOTEQUAL                             0x0205
 196 #define GL_GEQUAL                               0x0206
 197 #define GL_ALWAYS                               0x0207
 198 #define GL_DEPTH_TEST                           0x0B71
 199
 200 #define GL_RED_SCALE                            0x0D14
 201 #define GL_GREEN_SCALE                          0x0D18
 202 #define GL_BLUE_SCALE                           0x0D1A
 203 #define GL_ALPHA_SCALE                          0x0D1C
 204
 205 #define GL_DEPTH_BUFFER_BIT                     0x00000100
 206 #define GL_ACCUM_BUFFER_BIT                     0x00000200
 207 #define GL_STENCIL_BUFFER_BIT                   0x00000400
 208 #define GL_COLOR_BUFFER_BIT                     0x00004000
 209
 210 #define GL_STENCIL_TEST                         0x0B90
 211 #define GL_KEEP                                 0x1E00
 212 #define GL_REPLACE                              0x1E01
 213 #define GL_INCR                                 0x1E02
 214 #define GL_DECR                                 0x1E03
 215
 216 #define GL_POLYGON_OFFSET_FACTOR          0x8038
 217 #define GL_POLYGON_OFFSET_UNITS           0x2A00
 218 #define GL_POLYGON_OFFSET_POINT           0x2A01
 219 #define GL_POLYGON_OFFSET_LINE            0x2A02
 220 #define GL_POLYGON_OFFSET_FILL            0x8037
 221 #endif
 222
 223 // GL_ARB_multitexture
 224 extern int gl_textureunits;
 225 extern void (GLAPIENTRY *qglMultiTexCoord2f) (GLenum, GLfloat, GLfloat);
 226 extern void (GLAPIENTRY *qglMultiTexCoord3f) (GLenum, GLfloat, GLfloat, GLfloat);
 227 extern void (GLAPIENTRY *qglActiveTexture) (GLenum);
 228 extern void (GLAPIENTRY *qglClientActiveTexture) (GLenum);
 229 #ifndef GL_ACTIVE_TEXTURE_ARB
 230 #define GL_ACTIVE_TEXTURE_ARB                   0x84E0
 231 #define GL_CLIENT_ACTIVE_TEXTURE_ARB    0x84E1
 232 #define GL_MAX_TEXTURE_UNITS_ARB                0x84E2
 233 #define GL_TEXTURE0_ARB                                 0x84C0
 234 #define GL_TEXTURE1_ARB                                 0x84C1
 235 #define GL_TEXTURE2_ARB                                 0x84C2
 236 #define GL_TEXTURE3_ARB                                 0x84C3
 237 #define GL_TEXTURE4_ARB                                 0x84C4
 238 #define GL_TEXTURE5_ARB                                 0x84C5
 239 #define GL_TEXTURE6_ARB                                 0x84C6
 240 #define GL_TEXTURE7_ARB                                 0x84C7
 241 #define GL_TEXTURE8_ARB                                 0x84C8
 242 #define GL_TEXTURE9_ARB                                 0x84C9
 243 #define GL_TEXTURE10_ARB                                0x84CA
 244 #define GL_TEXTURE11_ARB                                0x84CB
 245 #define GL_TEXTURE12_ARB                                0x84CC
 246 #define GL_TEXTURE13_ARB                                0x84CD
 247 #define GL_TEXTURE14_ARB                                0x84CE
 248 #define GL_TEXTURE15_ARB                                0x84CF
 249 #define GL_TEXTURE16_ARB                                0x84D0
 250 #define GL_TEXTURE17_ARB                                0x84D1
 251 #define GL_TEXTURE18_ARB                                0x84D2
 252 #define GL_TEXTURE19_ARB                                0x84D3
 253 #define GL_TEXTURE20_ARB                                0x84D4
 254 #define GL_TEXTURE21_ARB                                0x84D5
 255 #define GL_TEXTURE22_ARB                                0x84D6
 256 #define GL_TEXTURE23_ARB                                0x84D7
 257 #define GL_TEXTURE24_ARB                                0x84D8
 258 #define GL_TEXTURE25_ARB                                0x84D9
 259 #define GL_TEXTURE26_ARB                                0x84DA
 260 #define GL_TEXTURE27_ARB                                0x84DB
 261 #define GL_TEXTURE28_ARB                                0x84DC
 262 #define GL_TEXTURE29_ARB                                0x84DD
 263 #define GL_TEXTURE30_ARB                                0x84DE
 264 #define GL_TEXTURE31_ARB                                0x84DF
 265 #endif
 266
 267 // GL_EXT_compiled_vertex_array
 268 extern int gl_supportslockarrays;
 269 extern void (GLAPIENTRY *qglLockArraysEXT) (GLint first, GLint count);
 270 extern void (GLAPIENTRY *qglUnlockArraysEXT) (void);
 271
 272 // GL_ARB_texture_env_combine
 273 extern int gl_combine_extension;
 274 #ifndef GL_COMBINE_ARB
 275 #define GL_COMBINE_ARB                                  0x8570
 276 #define GL_COMBINE_RGB_ARB                              0x8571
 277 #define GL_COMBINE_ALPHA_ARB                    0x8572
 278 #define GL_SOURCE0_RGB_ARB                              0x8580
 279 #define GL_SOURCE1_RGB_ARB                              0x8581
 280 #define GL_SOURCE2_RGB_ARB                              0x8582
 281 #define GL_SOURCE0_ALPHA_ARB                    0x8588
 282 #define GL_SOURCE1_ALPHA_ARB                    0x8589
 283 #define GL_SOURCE2_ALPHA_ARB                    0x858A
 284 #define GL_OPERAND0_RGB_ARB                             0x8590
 285 #define GL_OPERAND1_RGB_ARB                             0x8591
 286 #define GL_OPERAND2_RGB_ARB                             0x8592
 287 #define GL_OPERAND0_ALPHA_ARB                   0x8598
 288 #define GL_OPERAND1_ALPHA_ARB                   0x8599
 289 #define GL_OPERAND2_ALPHA_ARB                   0x859A
 290 #define GL_RGB_SCALE_ARB                                0x8573
 291 #define GL_ADD_SIGNED_ARB                               0x8574
 292 #define GL_INTERPOLATE_ARB                              0x8575
 293 #define GL_SUBTRACT_ARB                                 0x84E7
 294 #define GL_CONSTANT_ARB                                 0x8576
 295 #define GL_PRIMARY_COLOR_ARB                    0x8577
 296 #define GL_PREVIOUS_ARB                                 0x8578
 297 #endif
 298
 299 #ifndef GL_MAX_ELEMENTS_VERTICES
 300 #define GL_MAX_ELEMENTS_VERTICES                0x80E8
 301 #endif
 302 #ifndef GL_MAX_ELEMENTS_INDICES
 303 #define GL_MAX_ELEMENTS_INDICES                 0x80E9
 304 #endif
 305
 306
 307 extern int gl_textureshader;
 308 #ifndef GL_TEXTURE_SHADER_NV
 309 #define GL_TEXTURE_SHADER_NV                    0x86DE
 310 #define GL_SHADER_OPERATION_NV                  0x86DF
 311 #define GL_OFFSET_TEXTURE_MATRIX_NV             0x86E1
 312 #define GL_PREVIOUS_TEXTURE_INPUT_NV    0x86E4
 313 #define GL_OFFSET_TEXTURE_2D_NV                 0x86E8
 314 #define GL_DSDT_NV                                              0x86F5
 315 #define GL_DSDT8_NV                                             0x8709
 316 #endif
 317
 318 extern int gl_texture3d;
 319 #ifndef GL_TEXTURE_3D
 320 #define GL_PACK_SKIP_IMAGES                     0x806B
 321 #define GL_PACK_IMAGE_HEIGHT                    0x806C
 322 #define GL_UNPACK_SKIP_IMAGES                   0x806D
 323 #define GL_UNPACK_IMAGE_HEIGHT                  0x806E
 324 #define GL_TEXTURE_3D                           0x806F
 325 #define GL_PROXY_TEXTURE_3D                     0x8070
 326 #define GL_TEXTURE_DEPTH                        0x8071
 327 #define GL_TEXTURE_WRAP_R                       0x8072
 328 #define GL_MAX_3D_TEXTURE_SIZE                  0x8073
 329 #define GL_TEXTURE_BINDING_3D                   0x806A
 330 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);
 331 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);
 332 extern void (GLAPIENTRY *qglCopyTexSubImage3D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height);
 333 #endif
 334
 335 extern int gl_texturecubemap;
 336 #ifndef GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
 337 #define GL_NORMAL_MAP_ARB                           0x8511
 338 #define GL_REFLECTION_MAP_ARB               0x8512
 339 #define GL_TEXTURE_CUBE_MAP_ARB             0x8513
 340 #define GL_TEXTURE_BINDING_CUBE_MAP_ARB     0x8514
 341 #define GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB     0x8515
 342 #define GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB     0x8516
 343 #define GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB     0x8517
 344 #define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB     0x8518
 345 #define GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB     0x8519
 346 #define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB     0x851A
 347 #define GL_PROXY_TEXTURE_CUBE_MAP_ARB       0x851B
 348 #define GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB                0x851C
 349 #endif
 350
 351 extern int gl_dot3arb;
 352 #ifndef GL_DOT3_RGB_ARB
 353 #define GL_DOT3_RGB_ARB                         0x86AE
 354 #define GL_DOT3_RGBA_ARB                                0x86AF
 355 #endif
 356
 357 /*
 358 // uncomment if this is actually needed by anyone
 359 extern int gl_dot3ext;
 360 #ifndef GL_DOT3_RGB_EXT
 361 #define GL_DOT3_RGB_EXT                         0x8740
 362 #define GL_DOT3_RGBA_EXT                        0x8741
 363 #endif
 364 */
 365
 366 #ifndef GL_SCISSOR_TEST
 367 #define GL_SCISSOR_TEST                         0x0C11
 368 #define GL_SCISSOR_BOX                          0x0C10
 369 #endif
 370
 371 // GL_SGIS_texture_edge_clamp or GL_EXT_texture_edge_clamp
 372 extern int gl_support_clamptoedge;
 373 #ifndef GL_CLAMP_TO_EDGE
 374 #define GL_CLAMP_TO_EDGE 0x812F
 375 #endif
 376
 377 //GL_EXT_stencil_two_side
 378 #define GL_STENCIL_TEST_TWO_SIDE_EXT      0x8910
 379 #define GL_ACTIVE_STENCIL_FACE_EXT        0x8911
 380 extern void (GLAPIENTRY *qglActiveStencilFaceEXT)(GLenum);
 381 extern int gl_support_stenciltwoside;
 382
 383 extern void (GLAPIENTRY *qglScissor)(GLint x, GLint y, GLsizei width, GLsizei height);
 384
 385 extern void (GLAPIENTRY *qglClearColor)(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
 386
 387 extern void (GLAPIENTRY *qglClear)(GLbitfield mask);
 388
 389 extern void (GLAPIENTRY *qglAlphaFunc)(GLenum func, GLclampf ref);
 390 extern void (GLAPIENTRY *qglBlendFunc)(GLenum sfactor, GLenum dfactor);
 391 extern void (GLAPIENTRY *qglCullFace)(GLenum mode);
 392
 393 extern void (GLAPIENTRY *qglDrawBuffer)(GLenum mode);
 394 extern void (GLAPIENTRY *qglReadBuffer)(GLenum mode);
 395 extern void (GLAPIENTRY *qglEnable)(GLenum cap);
 396 extern void (GLAPIENTRY *qglDisable)(GLenum cap);
 397 extern GLboolean (GLAPIENTRY *qglIsEnabled)(GLenum cap);
 398
 399 extern void (GLAPIENTRY *qglEnableClientState)(GLenum cap);
 400 extern void (GLAPIENTRY *qglDisableClientState)(GLenum cap);
 401
 402 extern void (GLAPIENTRY *qglGetBooleanv)(GLenum pname, GLboolean *params);
 403 extern void (GLAPIENTRY *qglGetDoublev)(GLenum pname, GLdouble *params);
 404 extern void (GLAPIENTRY *qglGetFloatv)(GLenum pname, GLfloat *params);
 405 extern void (GLAPIENTRY *qglGetIntegerv)(GLenum pname, GLint *params);
 406
 407 extern GLenum (GLAPIENTRY *qglGetError)(void);
 408 extern const GLubyte* (GLAPIENTRY *qglGetString)(GLenum name);
 409 extern void (GLAPIENTRY *qglFinish)(void);
 410 extern void (GLAPIENTRY *qglFlush)(void);
 411
 412 extern void (GLAPIENTRY *qglClearDepth)(GLclampd depth);
 413 extern void (GLAPIENTRY *qglDepthFunc)(GLenum func);
 414 extern void (GLAPIENTRY *qglDepthMask)(GLboolean flag);
 415 extern void (GLAPIENTRY *qglDepthRange)(GLclampd near_val, GLclampd far_val);
 416 extern void (GLAPIENTRY *qglColorMask)(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
 417
 418 extern void (GLAPIENTRY *qglDrawRangeElements)(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices);
 419 extern void (GLAPIENTRY *qglDrawElements)(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices);
 420 extern void (GLAPIENTRY *qglVertexPointer)(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr);
 421 extern void (GLAPIENTRY *qglNormalPointer)(GLenum type, GLsizei stride, const GLvoid *ptr);
 422 extern void (GLAPIENTRY *qglColorPointer)(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr);
 423 extern void (GLAPIENTRY *qglTexCoordPointer)(GLint size, GLenum type, GLsizei stride, const GLvoid *ptr);
 424 extern void (GLAPIENTRY *qglArrayElement)(GLint i);
 425
 426 extern void (GLAPIENTRY *qglColor4f)(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha);
 427 extern void (GLAPIENTRY *qglTexCoord2f)(GLfloat s, GLfloat t);
 428 extern void (GLAPIENTRY *qglTexCoord3f)(GLfloat s, GLfloat t, GLfloat r);
 429 extern void (GLAPIENTRY *qglVertex2f)(GLfloat x, GLfloat y);
 430 extern void (GLAPIENTRY *qglVertex3f)(GLfloat x, GLfloat y, GLfloat z);
 431 extern void (GLAPIENTRY *qglBegin)(GLenum mode);
 432 extern void (GLAPIENTRY *qglEnd)(void);
 433
 434 extern void (GLAPIENTRY *qglMatrixMode)(GLenum mode);
 435 extern void (GLAPIENTRY *qglOrtho)(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val);
 436 extern void (GLAPIENTRY *qglFrustum)(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val);
 437 extern void (GLAPIENTRY *qglViewport)(GLint x, GLint y, GLsizei width, GLsizei height);
 438 extern void (GLAPIENTRY *qglPushMatrix)(void);
 439 extern void (GLAPIENTRY *qglPopMatrix)(void);
 440 extern void (GLAPIENTRY *qglLoadIdentity)(void);
 441 extern void (GLAPIENTRY *qglLoadMatrixd)(const GLdouble *m);
 442 extern void (GLAPIENTRY *qglLoadMatrixf)(const GLfloat *m);
 443 extern void (GLAPIENTRY *qglMultMatrixd)(const GLdouble *m);
 444 extern void (GLAPIENTRY *qglMultMatrixf)(const GLfloat *m);
 445 extern void (GLAPIENTRY *qglRotated)(GLdouble angle, GLdouble x, GLdouble y, GLdouble z);
 446 extern void (GLAPIENTRY *qglRotatef)(GLfloat angle, GLfloat x, GLfloat y, GLfloat z);
 447 extern void (GLAPIENTRY *qglScaled)(GLdouble x, GLdouble y, GLdouble z);
 448 extern void (GLAPIENTRY *qglScalef)(GLfloat x, GLfloat y, GLfloat z);
 449 extern void (GLAPIENTRY *qglTranslated)(GLdouble x, GLdouble y, GLdouble z);
 450 extern void (GLAPIENTRY *qglTranslatef)(GLfloat x, GLfloat y, GLfloat z);
 451
 452 extern void (GLAPIENTRY *qglReadPixels)(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels);
 453
 454 extern void (GLAPIENTRY *qglStencilFunc)(GLenum func, GLint ref, GLuint mask);
 455 extern void (GLAPIENTRY *qglStencilMask)(GLuint mask);
 456 extern void (GLAPIENTRY *qglStencilOp)(GLenum fail, GLenum zfail, GLenum zpass);
 457 extern void (GLAPIENTRY *qglClearStencil)(GLint s);
 458
 459 extern void (GLAPIENTRY *qglTexEnvf)(GLenum target, GLenum pname, GLfloat param);
 460 extern void (GLAPIENTRY *qglTexEnvfv)(GLenum target, GLenum pname, const GLfloat *params);
 461 extern void (GLAPIENTRY *qglTexEnvi)(GLenum target, GLenum pname, GLint param);
 462 extern void (GLAPIENTRY *qglTexParameterf)(GLenum target, GLenum pname, GLfloat param);
 463 extern void (GLAPIENTRY *qglTexParameterfv)(GLenum target, GLenum pname, GLfloat *params);
 464 extern void (GLAPIENTRY *qglTexParameteri)(GLenum target, GLenum pname, GLint param);
 465
 466 extern void (GLAPIENTRY *qglGenTextures)(GLsizei n, GLuint *textures);
 467 extern void (GLAPIENTRY *qglDeleteTextures)(GLsizei n, const GLuint *textures);
 468 extern void (GLAPIENTRY *qglBindTexture)(GLenum target, GLuint texture);
 469 //extern void (GLAPIENTRY *qglPrioritizeTextures)(GLsizei n, const GLuint *textures, const GLclampf *priorities);
 470 //extern GLboolean (GLAPIENTRY *qglAreTexturesResident)(GLsizei n, const GLuint *textures, GLboolean *residences);
 471 extern GLboolean (GLAPIENTRY *qglIsTexture)(GLuint texture);
 472 extern void (GLAPIENTRY *qglPixelStoref)(GLenum pname, GLfloat param);
 473 extern void (GLAPIENTRY *qglPixelStorei)(GLenum pname, GLint param);
 474
 475 extern void (GLAPIENTRY *qglTexImage1D)(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
 476 extern void (GLAPIENTRY *qglTexImage2D)(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels);
 477 extern void (GLAPIENTRY *qglTexSubImage1D)(GLenum target, GLint level, GLint xoffset, GLsizei width, GLenum format, GLenum type, const GLvoid *pixels);
 478 extern void (GLAPIENTRY *qglTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *pixels);
 479 extern void (GLAPIENTRY *qglCopyTexImage1D)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLint border);
 480 extern void (GLAPIENTRY *qglCopyTexImage2D)(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border);
 481 extern void (GLAPIENTRY *qglCopyTexSubImage1D)(GLenum target, GLint level, GLint xoffset, GLint x, GLint y, GLsizei width);
 482 extern void (GLAPIENTRY *qglCopyTexSubImage2D)(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height);
 483
 484 extern void (GLAPIENTRY *qglPolygonOffset)(GLfloat factor, GLfloat units);
 485
 486 #if WIN32
 487 extern int (WINAPI *qwglChoosePixelFormat)(HDC, CONST PIXELFORMATDESCRIPTOR *);
 488 extern int (WINAPI *qwglDescribePixelFormat)(HDC, int, UINT, LPPIXELFORMATDESCRIPTOR);
 489 //extern int (WINAPI *qwglGetPixelFormat)(HDC);
 490 extern BOOL (WINAPI *qwglSetPixelFormat)(HDC, int, CONST PIXELFORMATDESCRIPTOR *);
 491 extern BOOL (WINAPI *qwglSwapBuffers)(HDC);
 492 extern HGLRC (WINAPI *qwglCreateContext)(HDC);
 493 extern BOOL (WINAPI *qwglDeleteContext)(HGLRC);
 494 extern PROC (WINAPI *qwglGetProcAddress)(LPCSTR);
 495 extern BOOL (WINAPI *qwglMakeCurrent)(HDC, HGLRC);
 496 extern BOOL (WINAPI *qwglSwapIntervalEXT)(int interval);
 497 #endif
 498
 499 // GL_ARB_shader_objects
 500 extern int gl_support_shader_objects;
 501 #ifndef GL_PROGRAM_OBJECT_ARB
 502 // 1-byte character string
 503 typedef char GLcharARB;
 504 // 4-byte integer handle to a shader object or program object
 505 typedef int GLhandleARB;
 506 #endif
 507 extern void (GLAPIENTRY *qglDeleteObjectARB)(GLhandleARB obj);
 508 extern GLhandleARB (GLAPIENTRY *qglGetHandleARB)(GLenum pname);
 509 extern void (GLAPIENTRY *qglDetachObjectARB)(GLhandleARB containerObj, GLhandleARB attachedObj);
 510 extern GLhandleARB (GLAPIENTRY *qglCreateShaderObjectARB)(GLenum shaderType);
 511 extern void (GLAPIENTRY *qglShaderSourceARB)(GLhandleARB shaderObj, GLsizei count, const GLcharARB **string, const GLint *length);
 512 extern void (GLAPIENTRY *qglCompileShaderARB)(GLhandleARB shaderObj);
 513 extern GLhandleARB (GLAPIENTRY *qglCreateProgramObjectARB)(void);
 514 extern void (GLAPIENTRY *qglAttachObjectARB)(GLhandleARB containerObj, GLhandleARB obj);
 515 extern void (GLAPIENTRY *qglLinkProgramARB)(GLhandleARB programObj);
 516 extern void (GLAPIENTRY *qglUseProgramObjectARB)(GLhandleARB programObj);
 517 extern void (GLAPIENTRY *qglValidateProgramARB)(GLhandleARB programObj);
 518 extern void (GLAPIENTRY *qglUniform1fARB)(GLint location, GLfloat v0);
 519 extern void (GLAPIENTRY *qglUniform2fARB)(GLint location, GLfloat v0, GLfloat v1);
 520 extern void (GLAPIENTRY *qglUniform3fARB)(GLint location, GLfloat v0, GLfloat v1, GLfloat v2);
 521 extern void (GLAPIENTRY *qglUniform4fARB)(GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
 522 extern void (GLAPIENTRY *qglUniform1iARB)(GLint location, GLint v0);
 523 extern void (GLAPIENTRY *qglUniform2iARB)(GLint location, GLint v0, GLint v1);
 524 extern void (GLAPIENTRY *qglUniform3iARB)(GLint location, GLint v0, GLint v1, GLint v2);
 525 extern void (GLAPIENTRY *qglUniform4iARB)(GLint location, GLint v0, GLint v1, GLint v2, GLint v3);
 526 extern void (GLAPIENTRY *qglUniform1fvARB)(GLint location, GLsizei count, const GLfloat *value);
 527 extern void (GLAPIENTRY *qglUniform2fvARB)(GLint location, GLsizei count, const GLfloat *value);
 528 extern void (GLAPIENTRY *qglUniform3fvARB)(GLint location, GLsizei count, const GLfloat *value);
 529 extern void (GLAPIENTRY *qglUniform4fvARB)(GLint location, GLsizei count, const GLfloat *value);
 530 extern void (GLAPIENTRY *qglUniform1ivARB)(GLint location, GLsizei count, const GLint *value);
 531 extern void (GLAPIENTRY *qglUniform2ivARB)(GLint location, GLsizei count, const GLint *value);
 532 extern void (GLAPIENTRY *qglUniform3ivARB)(GLint location, GLsizei count, const GLint *value);
 533 extern void (GLAPIENTRY *qglUniform4ivARB)(GLint location, GLsizei count, const GLint *value);
 534 extern void (GLAPIENTRY *qglUniformMatrix2fvARB)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
 535 extern void (GLAPIENTRY *qglUniformMatrix3fvARB)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
 536 extern void (GLAPIENTRY *qglUniformMatrix4fvARB)(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value);
 537 extern void (GLAPIENTRY *qglGetObjectParameterfvARB)(GLhandleARB obj, GLenum pname, GLfloat *params);
 538 extern void (GLAPIENTRY *qglGetObjectParameterivARB)(GLhandleARB obj, GLenum pname, GLint *params);
 539 extern void (GLAPIENTRY *qglGetInfoLogARB)(GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *infoLog);
 540 extern void (GLAPIENTRY *qglGetAttachedObjectsARB)(GLhandleARB containerObj, GLsizei maxCount, GLsizei *count, GLhandleARB *obj);
 541 extern GLint (GLAPIENTRY *qglGetUniformLocationARB)(GLhandleARB programObj, const GLcharARB *name);
 542 extern void (GLAPIENTRY *qglGetActiveUniformARB)(GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
 543 extern void (GLAPIENTRY *qglGetUniformfvARB)(GLhandleARB programObj, GLint location, GLfloat *params);
 544 extern void (GLAPIENTRY *qglGetUniformivARB)(GLhandleARB programObj, GLint location, GLint *params);
 545 extern void (GLAPIENTRY *qglGetShaderSourceARB)(GLhandleARB obj, GLsizei maxLength, GLsizei *length, GLcharARB *source);
 546 #ifndef GL_PROGRAM_OBJECT_ARB
 547 #define GL_PROGRAM_OBJECT_ARB                                   0x8B40
 548 #define GL_OBJECT_TYPE_ARB                                              0x8B4E
 549 #define GL_OBJECT_SUBTYPE_ARB                                   0x8B4F
 550 #define GL_OBJECT_DELETE_STATUS_ARB                             0x8B80
 551 #define GL_OBJECT_COMPILE_STATUS_ARB                    0x8B81
 552 #define GL_OBJECT_LINK_STATUS_ARB                               0x8B82
 553 #define GL_OBJECT_VALIDATE_STATUS_ARB                   0x8B83
 554 #define GL_OBJECT_INFO_LOG_LENGTH_ARB                   0x8B84
 555 #define GL_OBJECT_ATTACHED_OBJECTS_ARB                  0x8B85
 556 #define GL_OBJECT_ACTIVE_UNIFORMS_ARB                   0x8B86
 557 #define GL_OBJECT_ACTIVE_UNIFORM_MAX_LENGTH_ARB 0x8B87
 558 #define GL_OBJECT_SHADER_SOURCE_LENGTH_ARB              0x8B88
 559 #define GL_SHADER_OBJECT_ARB                                    0x8B48
 560 #define GL_FLOAT                                                                0x1406
 561 #define GL_FLOAT_VEC2_ARB                                               0x8B50
 562 #define GL_FLOAT_VEC3_ARB                                               0x8B51
 563 #define GL_FLOAT_VEC4_ARB                                               0x8B52
 564 #define GL_INT                                                                  0x1404
 565 #define GL_INT_VEC2_ARB                                                 0x8B53
 566 #define GL_INT_VEC3_ARB                                                 0x8B54
 567 #define GL_INT_VEC4_ARB                                                 0x8B55
 568 #define GL_BOOL_ARB                                                             0x8B56
 569 #define GL_BOOL_VEC2_ARB                                                0x8B57
 570 #define GL_BOOL_VEC3_ARB                                                0x8B58
 571 #define GL_BOOL_VEC4_ARB                                                0x8B59
 572 #define GL_FLOAT_MAT2_ARB                                               0x8B5A
 573 #define GL_FLOAT_MAT3_ARB                                               0x8B5B
 574 #define GL_FLOAT_MAT4_ARB                                               0x8B5C
 575 #define GL_SAMPLER_1D_ARB                                               0x8B5D
 576 #define GL_SAMPLER_2D_ARB                                               0x8B5E
 577 #define GL_SAMPLER_3D_ARB                                               0x8B5F
 578 #define GL_SAMPLER_CUBE_ARB                                             0x8B60
 579 #define GL_SAMPLER_1D_SHADOW_ARB                                0x8B61
 580 #define GL_SAMPLER_2D_SHADOW_ARB                                0x8B62
 581 #define GL_SAMPLER_2D_RECT_ARB                                  0x8B63
 582 #define GL_SAMPLER_2D_RECT_SHADOW_ARB                   0x8B64
 583 #endif
 584
 585 // GL_ARB_vertex_shader
 586 extern int gl_support_vertex_shader;
 587 //extern void (GLAPIENTRY *qglVertexAttrib1fARB)(GLuint index, GLfloat v0);
 588 //extern void (GLAPIENTRY *qglVertexAttrib1sARB)(GLuint index, GLshort v0);
 589 //extern void (GLAPIENTRY *qglVertexAttrib1dARB)(GLuint index, GLdouble v0);
 590 //extern void (GLAPIENTRY *qglVertexAttrib2fARB)(GLuint index, GLfloat v0, GLfloat v1);
 591 //extern void (GLAPIENTRY *qglVertexAttrib2sARB)(GLuint index, GLshort v0, GLshort v1);
 592 //extern void (GLAPIENTRY *qglVertexAttrib2dARB)(GLuint index, GLdouble v0, GLdouble v1);
 593 //extern void (GLAPIENTRY *qglVertexAttrib3fARB)(GLuint index, GLfloat v0, GLfloat v1, GLfloat v2);
 594 //extern void (GLAPIENTRY *qglVertexAttrib3sARB)(GLuint index, GLshort v0, GLshort v1, GLshort v2);
 595 //extern void (GLAPIENTRY *qglVertexAttrib3dARB)(GLuint index, GLdouble v0, GLdouble v1, GLdouble v2);
 596 //extern void (GLAPIENTRY *qglVertexAttrib4fARB)(GLuint index, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
 597 //extern void (GLAPIENTRY *qglVertexAttrib4sARB)(GLuint index, GLshort v0, GLshort v1, GLshort v2, GLshort v3);
 598 //extern void (GLAPIENTRY *qglVertexAttrib4dARB)(GLuint index, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);
 599 //extern void (GLAPIENTRY *qglVertexAttrib4NubARB)(GLuint index, GLubyte x, GLubyte y, GLubyte z, GLubyte w);
 600 //extern void (GLAPIENTRY *qglVertexAttrib1fvARB)(GLuint index, const GLfloat *v);
 601 //extern void (GLAPIENTRY *qglVertexAttrib1svARB)(GLuint index, const GLshort *v);
 602 //extern void (GLAPIENTRY *qglVertexAttrib1dvARB)(GLuint index, const GLdouble *v);
 603 //extern void (GLAPIENTRY *qglVertexAttrib2fvARB)(GLuint index, const GLfloat *v);
 604 //extern void (GLAPIENTRY *qglVertexAttrib2svARB)(GLuint index, const GLshort *v);
 605 //extern void (GLAPIENTRY *qglVertexAttrib2dvARB)(GLuint index, const GLdouble *v);
 606 //extern void (GLAPIENTRY *qglVertexAttrib3fvARB)(GLuint index, const GLfloat *v);
 607 //extern void (GLAPIENTRY *qglVertexAttrib3svARB)(GLuint index, const GLshort *v);
 608 //extern void (GLAPIENTRY *qglVertexAttrib3dvARB)(GLuint index, const GLdouble *v);
 609 //extern void (GLAPIENTRY *qglVertexAttrib4fvARB)(GLuint index, const GLfloat *v);
 610 //extern void (GLAPIENTRY *qglVertexAttrib4svARB)(GLuint index, const GLshort *v);
 611 //extern void (GLAPIENTRY *qglVertexAttrib4dvARB)(GLuint index, const GLdouble *v);
 612 //extern void (GLAPIENTRY *qglVertexAttrib4ivARB)(GLuint index, const GLint *v);
 613 //extern void (GLAPIENTRY *qglVertexAttrib4bvARB)(GLuint index, const GLbyte *v);
 614 //extern void (GLAPIENTRY *qglVertexAttrib4ubvARB)(GLuint index, const GLubyte *v);
 615 //extern void (GLAPIENTRY *qglVertexAttrib4usvARB)(GLuint index, const GLushort *v);
 616 //extern void (GLAPIENTRY *qglVertexAttrib4uivARB)(GLuint index, const GLuint *v);
 617 //extern void (GLAPIENTRY *qglVertexAttrib4NbvARB)(GLuint index, const GLbyte *v);
 618 //extern void (GLAPIENTRY *qglVertexAttrib4NsvARB)(GLuint index, const GLshort *v);
 619 //extern void (GLAPIENTRY *qglVertexAttrib4NivARB)(GLuint index, const GLint *v);
 620 //extern void (GLAPIENTRY *qglVertexAttrib4NubvARB)(GLuint index, const GLubyte *v);
 621 //extern void (GLAPIENTRY *qglVertexAttrib4NusvARB)(GLuint index, const GLushort *v);
 622 //extern void (GLAPIENTRY *qglVertexAttrib4NuivARB)(GLuint index, const GLuint *v);
 623 extern void (GLAPIENTRY *qglVertexAttribPointerARB)(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
 624 extern void (GLAPIENTRY *qglEnableVertexAttribArrayARB)(GLuint index);
 625 extern void (GLAPIENTRY *qglDisableVertexAttribArrayARB)(GLuint index);
 626 extern void (GLAPIENTRY *qglBindAttribLocationARB)(GLhandleARB programObj, GLuint index, const GLcharARB *name);
 627 extern void (GLAPIENTRY *qglGetActiveAttribARB)(GLhandleARB programObj, GLuint index, GLsizei maxLength, GLsizei *length, GLint *size, GLenum *type, GLcharARB *name);
 628 extern GLint (GLAPIENTRY *qglGetAttribLocationARB)(GLhandleARB programObj, const GLcharARB *name);
 629 //extern void (GLAPIENTRY *qglGetVertexAttribdvARB)(GLuint index, GLenum pname, GLdouble *params);
 630 //extern void (GLAPIENTRY *qglGetVertexAttribfvARB)(GLuint index, GLenum pname, GLfloat *params);
 631 //extern void (GLAPIENTRY *qglGetVertexAttribivARB)(GLuint index, GLenum pname, GLint *params);
 632 //extern void (GLAPIENTRY *qglGetVertexAttribPointervARB)(GLuint index, GLenum pname, GLvoid **pointer);
 633 #ifndef GL_VERTEX_SHADER_ARB
 634 #define GL_VERTEX_SHADER_ARB                                            0x8B31
 635 #define GL_MAX_VERTEX_UNIFORM_COMPONENTS_ARB            0x8B4A
 636 #define GL_MAX_VARYING_FLOATS_ARB                                       0x8B4B
 637 #define GL_MAX_VERTEX_ATTRIBS_ARB                                       0x8869
 638 #define GL_MAX_TEXTURE_IMAGE_UNITS_ARB                          0x8872
 639 #define GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS_ARB           0x8B4C
 640 #define GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS_ARB         0x8B4D
 641 #define GL_MAX_TEXTURE_COORDS_ARB                                       0x8871
 642 #define GL_VERTEX_PROGRAM_POINT_SIZE_ARB                        0x8642
 643 #define GL_VERTEX_PROGRAM_TWO_SIDE_ARB                          0x8643
 644 #define GL_OBJECT_ACTIVE_ATTRIBUTES_ARB                         0x8B89
 645 #define GL_OBJECT_ACTIVE_ATTRIBUTE_MAX_LENGTH_ARB       0x8B8A
 646 #define GL_VERTEX_ATTRIB_ARRAY_ENABLED_ARB                      0x8622
 647 #define GL_VERTEX_ATTRIB_ARRAY_SIZE_ARB                         0x8623
 648 #define GL_VERTEX_ATTRIB_ARRAY_STRIDE_ARB                       0x8624
 649 #define GL_VERTEX_ATTRIB_ARRAY_TYPE_ARB                         0x8625
 650 #define GL_VERTEX_ATTRIB_ARRAY_NORMALIZED_ARB           0x886A
 651 #define GL_CURRENT_VERTEX_ATTRIB_ARB                            0x8626
 652 #define GL_VERTEX_ATTRIB_ARRAY_POINTER_ARB                      0x8645
 653 #define GL_FLOAT                                                                        0x1406
 654 #define GL_FLOAT_VEC2_ARB                                                       0x8B50
 655 #define GL_FLOAT_VEC3_ARB                                                       0x8B51
 656 #define GL_FLOAT_VEC4_ARB                                                       0x8B52
 657 #define GL_FLOAT_MAT2_ARB                                                       0x8B5A
 658 #define GL_FLOAT_MAT3_ARB                                                       0x8B5B
 659 #define GL_FLOAT_MAT4_ARB                                                       0x8B5C
 660 #endif
 661
 662 // GL_ARB_fragment_shader
 663 extern int gl_support_fragment_shader;
 664 #ifndef GL_FRAGMENT_SHADER_ARB
 665 #define GL_FRAGMENT_SHADER_ARB                                          0x8B30
 666 #define GL_MAX_FRAGMENT_UNIFORM_COMPONENTS_ARB          0x8B49
 667 #define GL_MAX_TEXTURE_COORDS_ARB                                       0x8871
 668 #define GL_MAX_TEXTURE_IMAGE_UNITS_ARB                          0x8872
 669 #define GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB          0x8B8B
 670 #endif
 671
 672 // GL_ARB_shading_language_100
 673 extern int gl_support_shading_language_100;
 674 #ifndef GL_SHADING_LANGUAGE_VERSION_ARB
 675 #define GL_SHADING_LANGUAGE_VERSION_ARB                         0x8B8C
 676 #endif
 677
 678 // GL_EXT_bgr
 679 #define GL_BGR                                  0x80E0
 680
 681 // GL_EXT_bgra
 682 #define GL_BGRA                                 0x80E1
 683
 684 #define DEBUGGL
 685
 686 #ifdef DEBUGGL
 687 #define CHECKGLERROR {if (gl_printcheckerror.integer) Con_Printf("CHECKGLERROR at %s:%d\n", __FILE__, __LINE__);if (gl_paranoid.integer && (errornumber = qglGetError())) GL_PrintError(errornumber, __FILE__, __LINE__);}
 688 extern int errornumber;
 689 void GL_PrintError(int errornumber, char *filename, int linenumber);
 690 #else
 691 #define CHECKGLERROR
 692 #endif
 693
 694 #endif
 695