gl_backend.c

   1
   2 #include "quakedef.h"
   3 #include "cl_collision.h"
   4
   5 cvar_t gl_mesh_drawrangeelements = {0, "gl_mesh_drawrangeelements", "1", "use glDrawRangeElements function if available instead of glDrawElements (for performance comparisons or bug testing)"};
   6 cvar_t gl_mesh_testarrayelement = {0, "gl_mesh_testarrayelement", "0", "use glBegin(GL_TRIANGLES);glArrayElement();glEnd(); primitives instead of glDrawElements (useful to test for driver bugs with glDrawElements)"};
   7 cvar_t gl_mesh_testmanualfeeding = {0, "gl_mesh_testmanualfeeding", "0", "use glBegin(GL_TRIANGLES);glTexCoord2f();glVertex3f();glEnd(); primitives instead of glDrawElements (useful to test for driver bugs with glDrawElements)"};
   8 cvar_t gl_paranoid = {0, "gl_paranoid", "0", "enables OpenGL error checking and other tests"};
   9 cvar_t gl_printcheckerror = {0, "gl_printcheckerror", "0", "prints all OpenGL error checks, useful to identify location of driver crashes"};
  10
  11 cvar_t r_render = {0, "r_render", "1", "enables rendering calls (you want this on!)"};
  12 cvar_t r_waterwarp = {CVAR_SAVE, "r_waterwarp", "1", "warp view while underwater"};
  13 cvar_t gl_polyblend = {CVAR_SAVE, "gl_polyblend", "1", "tints view while underwater, hurt, etc"};
  14 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1", "enables OpenGL dithering (16bit looks bad with this off)"};
  15 cvar_t gl_lockarrays = {0, "gl_lockarrays", "0", "enables use of glLockArraysEXT, may cause glitches with some broken drivers, and may be slower than normal"};
  16 cvar_t gl_lockarrays_minimumvertices = {0, "gl_lockarrays_minimumvertices", "1", "minimum number of vertices required for use of glLockArraysEXT, setting this too low may reduce performance"};
  17
  18 int gl_maxdrawrangeelementsvertices;
  19 int gl_maxdrawrangeelementsindices;
  20
  21 #ifdef DEBUGGL
  22 int errornumber = 0;
  23
  24 void GL_PrintError(int errornumber, char *filename, int linenumber)
  25 {
  26         switch(errornumber)
  27         {
  28 #ifdef GL_INVALID_ENUM
  29         case GL_INVALID_ENUM:
  30                 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
  31                 break;
  32 #endif
  33 #ifdef GL_INVALID_VALUE
  34         case GL_INVALID_VALUE:
  35                 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
  36                 break;
  37 #endif
  38 #ifdef GL_INVALID_OPERATION
  39         case GL_INVALID_OPERATION:
  40                 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
  41                 break;
  42 #endif
  43 #ifdef GL_STACK_OVERFLOW
  44         case GL_STACK_OVERFLOW:
  45                 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
  46                 break;
  47 #endif
  48 #ifdef GL_STACK_UNDERFLOW
  49         case GL_STACK_UNDERFLOW:
  50                 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
  51                 break;
  52 #endif
  53 #ifdef GL_OUT_OF_MEMORY
  54         case GL_OUT_OF_MEMORY:
  55                 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
  56                 break;
  57 #endif
  58 #ifdef GL_TABLE_TOO_LARGE
  59         case GL_TABLE_TOO_LARGE:
  60                 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
  61                 break;
  62 #endif
  63         default:
  64                 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
  65                 break;
  66         }
  67 }
  68 #endif
  69
  70 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active");
  71
  72 void SCR_ScreenShot_f (void);
  73
  74 static matrix4x4_t backend_viewmatrix;
  75 static matrix4x4_t backend_modelmatrix;
  76 static matrix4x4_t backend_modelviewmatrix;
  77 static matrix4x4_t backend_projectmatrix;
  78
  79 static unsigned int backendunits, backendimageunits, backendarrayunits, backendactive;
  80
  81 /*
  82 note: here's strip order for a terrain row:
  83 0--1--2--3--4
  84 |\ |\ |\ |\ |
  85 | \| \| \| \|
  86 A--B--C--D--E
  87 clockwise
  88
  89 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
  90
  91 *elements++ = i + row;
  92 *elements++ = i;
  93 *elements++ = i + row + 1;
  94 *elements++ = i;
  95 *elements++ = i + 1;
  96 *elements++ = i + row + 1;
  97
  98
  99 for (y = 0;y < rows - 1;y++)
 100 {
 101         for (x = 0;x < columns - 1;x++)
 102         {
 103                 i = y * rows + x;
 104                 *elements++ = i + columns;
 105                 *elements++ = i;
 106                 *elements++ = i + columns + 1;
 107                 *elements++ = i;
 108                 *elements++ = i + 1;
 109                 *elements++ = i + columns + 1;
 110         }
 111 }
 112
 113 alternative:
 114 0--1--2--3--4
 115 | /| /|\ | /|
 116 |/ |/ | \|/ |
 117 A--B--C--D--E
 118 counterclockwise
 119
 120 for (y = 0;y < rows - 1;y++)
 121 {
 122         for (x = 0;x < columns - 1;x++)
 123         {
 124                 i = y * rows + x;
 125                 *elements++ = i;
 126                 *elements++ = i + columns;
 127                 *elements++ = i + columns + 1;
 128                 *elements++ = i + columns;
 129                 *elements++ = i + columns + 1;
 130                 *elements++ = i + 1;
 131         }
 132 }
 133 */
 134
 135 int polygonelements[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 136 int quadelements[QUADELEMENTS_MAXQUADS*6];
 137
 138 void GL_Backend_AllocArrays(void)
 139 {
 140 }
 141
 142 void GL_Backend_FreeArrays(void)
 143 {
 144 }
 145
 146 static void gl_backend_start(void)
 147 {
 148         Con_Print("OpenGL Backend starting...\n");
 149         CHECKGLERROR
 150
 151         if (qglDrawRangeElements != NULL)
 152         {
 153                 CHECKGLERROR
 154                 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
 155                 CHECKGLERROR
 156                 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
 157                 CHECKGLERROR
 158                 Con_Printf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
 159         }
 160
 161         backendunits = bound(1, gl_textureunits, MAX_TEXTUREUNITS);
 162         backendimageunits = backendunits;
 163         backendarrayunits = backendunits;
 164         if (gl_support_fragment_shader)
 165         {
 166                 CHECKGLERROR
 167                 qglGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS_ARB, (int *)&backendimageunits);
 168                 CHECKGLERROR
 169                 qglGetIntegerv(GL_MAX_TEXTURE_COORDS_ARB, (int *)&backendarrayunits);
 170                 CHECKGLERROR
 171                 Con_Printf("GLSL shader support detected: texture units = %i texenv, %i image, %i array\n", backendunits, backendimageunits, backendarrayunits);
 172                 backendimageunits = bound(1, backendimageunits, MAX_TEXTUREUNITS);
 173                 backendarrayunits = bound(1, backendarrayunits, MAX_TEXTUREUNITS);
 174         }
 175         else if (backendunits > 1)
 176                 Con_Printf("multitexture detected: texture units = %i\n", backendunits);
 177         else
 178                 Con_Printf("singletexture\n");
 179
 180         GL_Backend_AllocArrays();
 181
 182         Con_Printf("OpenGL backend started.\n");
 183
 184         CHECKGLERROR
 185
 186         backendactive = true;
 187 }
 188
 189 static void gl_backend_shutdown(void)
 190 {
 191         backendunits = 0;
 192         backendimageunits = 0;
 193         backendarrayunits = 0;
 194         backendactive = false;
 195
 196         Con_Print("OpenGL Backend shutting down\n");
 197
 198         GL_Backend_FreeArrays();
 199 }
 200
 201 static void gl_backend_newmap(void)
 202 {
 203 }
 204
 205 void gl_backend_init(void)
 206 {
 207         int i;
 208
 209         for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
 210         {
 211                 polygonelements[i * 3 + 0] = 0;
 212                 polygonelements[i * 3 + 1] = i + 1;
 213                 polygonelements[i * 3 + 2] = i + 2;
 214         }
 215         // elements for rendering a series of quads as triangles
 216         for (i = 0;i < QUADELEMENTS_MAXQUADS;i++)
 217         {
 218                 quadelements[i * 6 + 0] = i * 4;
 219                 quadelements[i * 6 + 1] = i * 4 + 1;
 220                 quadelements[i * 6 + 2] = i * 4 + 2;
 221                 quadelements[i * 6 + 3] = i * 4;
 222                 quadelements[i * 6 + 4] = i * 4 + 2;
 223                 quadelements[i * 6 + 5] = i * 4 + 3;
 224         }
 225
 226         Cvar_RegisterVariable(&r_render);
 227         Cvar_RegisterVariable(&r_waterwarp);
 228         Cvar_RegisterVariable(&gl_polyblend);
 229         Cvar_RegisterVariable(&gl_dither);
 230         Cvar_RegisterVariable(&gl_lockarrays);
 231         Cvar_RegisterVariable(&gl_lockarrays_minimumvertices);
 232         Cvar_RegisterVariable(&gl_paranoid);
 233         Cvar_RegisterVariable(&gl_printcheckerror);
 234 #ifdef NORENDER
 235         Cvar_SetValue("r_render", 0);
 236 #endif
 237
 238         Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
 239         Cvar_RegisterVariable(&gl_mesh_testarrayelement);
 240         Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
 241
 242         R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
 243 }
 244
 245 void GL_SetupView_Orientation_Identity (void)
 246 {
 247         backend_viewmatrix = identitymatrix;
 248         memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
 249 }
 250
 251 void GL_SetupView_Orientation_FromEntity(const matrix4x4_t *matrix)
 252 {
 253         matrix4x4_t tempmatrix, basematrix;
 254         Matrix4x4_Invert_Simple(&tempmatrix, matrix);
 255         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 256         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 257         Matrix4x4_Concat(&backend_viewmatrix, &basematrix, &tempmatrix);
 258         //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
 259         //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
 260         //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
 261         //Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
 262         memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
 263 }
 264
 265 void GL_SetupView_Mode_Perspective (double frustumx, double frustumy, double zNear, double zFar)
 266 {
 267         double m[16];
 268
 269         // set up viewpoint
 270         CHECKGLERROR
 271         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 272         qglLoadIdentity();CHECKGLERROR
 273         // set view pyramid
 274         qglFrustum(-frustumx * zNear, frustumx * zNear, -frustumy * zNear, frustumy * zNear, zNear, zFar);CHECKGLERROR
 275         qglGetDoublev(GL_PROJECTION_MATRIX, m);CHECKGLERROR
 276         Matrix4x4_FromArrayDoubleGL(&backend_projectmatrix, m);
 277         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 278         GL_SetupView_Orientation_Identity();
 279         CHECKGLERROR
 280 }
 281
 282 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double frustumx, double frustumy, double zNear)
 283 {
 284         double nudge, m[16];
 285
 286         // set up viewpoint
 287         CHECKGLERROR
 288         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 289         qglLoadIdentity();CHECKGLERROR
 290         // set view pyramid
 291         nudge = 1.0 - 1.0 / (1<<23);
 292         m[ 0] = 1.0 / frustumx;
 293         m[ 1] = 0;
 294         m[ 2] = 0;
 295         m[ 3] = 0;
 296         m[ 4] = 0;
 297         m[ 5] = 1.0 / frustumy;
 298         m[ 6] = 0;
 299         m[ 7] = 0;
 300         m[ 8] = 0;
 301         m[ 9] = 0;
 302         m[10] = -nudge;
 303         m[11] = -1;
 304         m[12] = 0;
 305         m[13] = 0;
 306         m[14] = -2 * zNear * nudge;
 307         m[15] = 0;
 308         qglLoadMatrixd(m);CHECKGLERROR
 309         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 310         GL_SetupView_Orientation_Identity();
 311         CHECKGLERROR
 312         Matrix4x4_FromArrayDoubleGL(&backend_projectmatrix, m);
 313 }
 314
 315 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
 316 {
 317         double m[16];
 318
 319         // set up viewpoint
 320         CHECKGLERROR
 321         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 322         qglLoadIdentity();CHECKGLERROR
 323         qglOrtho(x1, x2, y2, y1, zNear, zFar);CHECKGLERROR
 324         qglGetDoublev(GL_PROJECTION_MATRIX, m);CHECKGLERROR
 325         Matrix4x4_FromArrayDoubleGL(&backend_projectmatrix, m);
 326         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 327         GL_SetupView_Orientation_Identity();
 328         CHECKGLERROR
 329 }
 330
 331 typedef struct gltextureunit_s
 332 {
 333         const void *pointer_texcoord;
 334         size_t pointer_texcoord_offset;
 335         int pointer_texcoord_buffer;
 336         int t1d, t2d, t3d, tcubemap;
 337         int arrayenabled;
 338         unsigned int arraycomponents;
 339         int rgbscale, alphascale;
 340         int combinergb, combinealpha;
 341         // FIXME: add more combine stuff
 342         // texmatrixenabled exists only to avoid unnecessary texmatrix compares
 343         int texmatrixenabled;
 344         matrix4x4_t matrix;
 345 }
 346 gltextureunit_t;
 347
 348 static struct gl_state_s
 349 {
 350         int cullface;
 351         int cullfaceenable;
 352         int blendfunc1;
 353         int blendfunc2;
 354         int blend;
 355         GLboolean depthmask;
 356         int colormask; // stored as bottom 4 bits: r g b a (3 2 1 0 order)
 357         int depthtest;
 358         int alphatest;
 359         int scissortest;
 360         unsigned int unit;
 361         unsigned int clientunit;
 362         gltextureunit_t units[MAX_TEXTUREUNITS];
 363         float color4f[4];
 364         int lockrange_first;
 365         int lockrange_count;
 366         int vertexbufferobject;
 367         int elementbufferobject;
 368         qboolean pointer_color_enabled;
 369         const void *pointer_vertex;
 370         const void *pointer_color;
 371         size_t pointer_vertex_offset;
 372         size_t pointer_color_offset;
 373         int pointer_vertex_buffer;
 374         int pointer_color_buffer;
 375 }
 376 gl_state;
 377
 378 static void GL_BindVBO(int bufferobject)
 379 {
 380         if (gl_state.vertexbufferobject != bufferobject)
 381         {
 382                 gl_state.vertexbufferobject = bufferobject;
 383                 CHECKGLERROR
 384                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, bufferobject);
 385                 CHECKGLERROR
 386         }
 387 }
 388
 389 static void GL_BindEBO(int bufferobject)
 390 {
 391         if (gl_state.elementbufferobject != bufferobject)
 392         {
 393                 gl_state.elementbufferobject = bufferobject;
 394                 CHECKGLERROR
 395                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobject);
 396                 CHECKGLERROR
 397         }
 398 }
 399
 400 void GL_SetupTextureState(void)
 401 {
 402         unsigned int i;
 403         gltextureunit_t *unit;
 404         CHECKGLERROR
 405         gl_state.unit = MAX_TEXTUREUNITS;
 406         gl_state.clientunit = MAX_TEXTUREUNITS;
 407         for (i = 0;i < MAX_TEXTUREUNITS;i++)
 408         {
 409                 unit = gl_state.units + i;
 410                 unit->t1d = 0;
 411                 unit->t2d = 0;
 412                 unit->t3d = 0;
 413                 unit->tcubemap = 0;
 414                 unit->arrayenabled = false;
 415                 unit->arraycomponents = 0;
 416                 unit->pointer_texcoord = NULL;
 417                 unit->pointer_texcoord_buffer = 0;
 418                 unit->pointer_texcoord_offset = 0;
 419                 unit->rgbscale = 1;
 420                 unit->alphascale = 1;
 421                 unit->combinergb = GL_MODULATE;
 422                 unit->combinealpha = GL_MODULATE;
 423                 unit->texmatrixenabled = false;
 424                 unit->matrix = identitymatrix;
 425         }
 426
 427         for (i = 0;i < backendimageunits;i++)
 428         {
 429                 GL_ActiveTexture(i);
 430                 qglBindTexture(GL_TEXTURE_1D, 0);CHECKGLERROR
 431                 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
 432                 if (gl_texture3d)
 433                 {
 434                         qglBindTexture(GL_TEXTURE_3D, 0);CHECKGLERROR
 435                 }
 436                 if (gl_texturecubemap)
 437                 {
 438                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);CHECKGLERROR
 439                 }
 440         }
 441
 442         for (i = 0;i < backendarrayunits;i++)
 443         {
 444                 GL_ClientActiveTexture(i);
 445                 GL_BindVBO(0);
 446                 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
 447                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
 448         }
 449
 450         for (i = 0;i < backendunits;i++)
 451         {
 452                 GL_ActiveTexture(i);
 453                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
 454                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
 455                 if (gl_texture3d)
 456                 {
 457                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
 458                 }
 459                 if (gl_texturecubemap)
 460                 {
 461                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
 462                 }
 463                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
 464                 qglLoadIdentity();CHECKGLERROR
 465                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 466                 if (gl_combine.integer)
 467                 {
 468                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
 469                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
 470                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
 471                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
 472                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
 473                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
 474                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
 475                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
 476                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
 477                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
 478                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
 479                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
 480                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
 481                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
 482                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
 483                         qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
 484                         qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
 485                 }
 486                 else
 487                 {
 488                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
 489                 }
 490                 CHECKGLERROR
 491         }
 492         CHECKGLERROR
 493 }
 494
 495 void GL_Backend_ResetState(void)
 496 {
 497         memset(&gl_state, 0, sizeof(gl_state));
 498         gl_state.depthtest = true;
 499         gl_state.alphatest = false;
 500         gl_state.blendfunc1 = GL_ONE;
 501         gl_state.blendfunc2 = GL_ZERO;
 502         gl_state.blend = false;
 503         gl_state.depthmask = GL_TRUE;
 504         gl_state.colormask = 15;
 505         gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
 506         gl_state.lockrange_first = 0;
 507         gl_state.lockrange_count = 0;
 508         gl_state.cullface = GL_FRONT; // quake is backwards, this culls back faces
 509         gl_state.cullfaceenable = true;
 510
 511         CHECKGLERROR
 512
 513         qglColorMask(1, 1, 1, 1);
 514         qglAlphaFunc(GL_GEQUAL, 0.5);CHECKGLERROR
 515         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 516         qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
 517         qglDisable(GL_BLEND);CHECKGLERROR
 518         qglCullFace(gl_state.cullface);CHECKGLERROR
 519         qglEnable(GL_CULL_FACE);CHECKGLERROR
 520         qglDepthFunc(GL_LEQUAL);CHECKGLERROR
 521         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 522         qglDepthMask(gl_state.depthmask);CHECKGLERROR
 523
 524         if (gl_support_arb_vertex_buffer_object)
 525         {
 526                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 527                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
 528         }
 529
 530         qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
 531         qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
 532
 533         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
 534         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
 535
 536         GL_Color(0, 0, 0, 0);
 537         GL_Color(1, 1, 1, 1);
 538
 539         GL_SetupTextureState();
 540 }
 541
 542 void GL_ActiveTexture(unsigned int num)
 543 {
 544         if (gl_state.unit != num)
 545         {
 546                 gl_state.unit = num;
 547                 if (qglActiveTexture)
 548                 {
 549                         CHECKGLERROR
 550                         qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
 551                         CHECKGLERROR
 552                 }
 553         }
 554 }
 555
 556 void GL_ClientActiveTexture(unsigned int num)
 557 {
 558         if (gl_state.clientunit != num)
 559         {
 560                 gl_state.clientunit = num;
 561                 if (qglActiveTexture)
 562                 {
 563                         CHECKGLERROR
 564                         qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
 565                         CHECKGLERROR
 566                 }
 567         }
 568 }
 569
 570 void GL_BlendFunc(int blendfunc1, int blendfunc2)
 571 {
 572         if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
 573         {
 574                 CHECKGLERROR
 575                 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
 576                 if (gl_state.blendfunc2 == GL_ZERO)
 577                 {
 578                         if (gl_state.blendfunc1 == GL_ONE)
 579                         {
 580                                 if (gl_state.blend)
 581                                 {
 582                                         gl_state.blend = 0;
 583                                         qglDisable(GL_BLEND);CHECKGLERROR
 584                                 }
 585                         }
 586                         else
 587                         {
 588                                 if (!gl_state.blend)
 589                                 {
 590                                         gl_state.blend = 1;
 591                                         qglEnable(GL_BLEND);CHECKGLERROR
 592                                 }
 593                         }
 594                 }
 595                 else
 596                 {
 597                         if (!gl_state.blend)
 598                         {
 599                                 gl_state.blend = 1;
 600                                 qglEnable(GL_BLEND);CHECKGLERROR
 601                         }
 602                 }
 603         }
 604 }
 605
 606 void GL_DepthMask(int state)
 607 {
 608         if (gl_state.depthmask != state)
 609         {
 610                 CHECKGLERROR
 611                 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
 612         }
 613 }
 614
 615 void GL_DepthTest(int state)
 616 {
 617         if (gl_state.depthtest != state)
 618         {
 619                 gl_state.depthtest = state;
 620                 CHECKGLERROR
 621                 if (gl_state.depthtest)
 622                 {
 623                         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 624                 }
 625                 else
 626                 {
 627                         qglDisable(GL_DEPTH_TEST);CHECKGLERROR
 628                 }
 629         }
 630 }
 631
 632 void GL_CullFace(int state)
 633 {
 634         CHECKGLERROR
 635         if (state != GL_NONE)
 636         {
 637                 if (!gl_state.cullfaceenable)
 638                 {
 639                         gl_state.cullfaceenable = true;
 640                         qglEnable(GL_CULL_FACE);CHECKGLERROR
 641                 }
 642                 if (gl_state.cullface != state)
 643                 {
 644                         gl_state.cullface = state;
 645                         qglCullFace(gl_state.cullface);CHECKGLERROR
 646                 }
 647         }
 648         else
 649         {
 650                 if (gl_state.cullfaceenable)
 651                 {
 652                         gl_state.cullfaceenable = false;
 653                         qglDisable(GL_CULL_FACE);CHECKGLERROR
 654                 }
 655         }
 656 }
 657
 658 void GL_AlphaTest(int state)
 659 {
 660         if (gl_state.alphatest != state)
 661         {
 662                 gl_state.alphatest = state;
 663                 CHECKGLERROR
 664                 if (gl_state.alphatest)
 665                 {
 666                         qglEnable(GL_ALPHA_TEST);CHECKGLERROR
 667                 }
 668                 else
 669                 {
 670                         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 671                 }
 672         }
 673 }
 674
 675 void GL_ColorMask(int r, int g, int b, int a)
 676 {
 677         int state = r*8 + g*4 + b*2 + a*1;
 678         if (gl_state.colormask != state)
 679         {
 680                 gl_state.colormask = state;
 681                 CHECKGLERROR
 682                 qglColorMask((GLboolean)r, (GLboolean)g, (GLboolean)b, (GLboolean)a);CHECKGLERROR
 683         }
 684 }
 685
 686 void GL_Color(float cr, float cg, float cb, float ca)
 687 {
 688         if (gl_state.pointer_color_enabled || gl_state.color4f[0] != cr || gl_state.color4f[1] != cg || gl_state.color4f[2] != cb || gl_state.color4f[3] != ca)
 689         {
 690                 gl_state.color4f[0] = cr;
 691                 gl_state.color4f[1] = cg;
 692                 gl_state.color4f[2] = cb;
 693                 gl_state.color4f[3] = ca;
 694                 CHECKGLERROR
 695                 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
 696                 CHECKGLERROR
 697         }
 698 }
 699
 700 void GL_LockArrays(int first, int count)
 701 {
 702         if (count < gl_lockarrays_minimumvertices.integer)
 703         {
 704                 first = 0;
 705                 count = 0;
 706         }
 707         if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
 708         {
 709                 if (gl_state.lockrange_count)
 710                 {
 711                         gl_state.lockrange_count = 0;
 712                         CHECKGLERROR
 713                         qglUnlockArraysEXT();
 714                         CHECKGLERROR
 715                 }
 716                 if (count && gl_supportslockarrays && gl_lockarrays.integer && r_render.integer)
 717                 {
 718                         gl_state.lockrange_first = first;
 719                         gl_state.lockrange_count = count;
 720                         CHECKGLERROR
 721                         qglLockArraysEXT(first, count);
 722                         CHECKGLERROR
 723                 }
 724         }
 725 }
 726
 727 void GL_Scissor (int x, int y, int width, int height)
 728 {
 729         CHECKGLERROR
 730         qglScissor(x, vid.height - (y + height),width,height);
 731         CHECKGLERROR
 732 }
 733
 734 void GL_ScissorTest(int state)
 735 {
 736         if(gl_state.scissortest == state)
 737                 return;
 738
 739         CHECKGLERROR
 740         if((gl_state.scissortest = state))
 741                 qglEnable(GL_SCISSOR_TEST);
 742         else
 743                 qglDisable(GL_SCISSOR_TEST);
 744         CHECKGLERROR
 745 }
 746
 747 void GL_Clear(int mask)
 748 {
 749         CHECKGLERROR
 750         qglClear(mask);CHECKGLERROR
 751 }
 752
 753 void GL_TransformToScreen(const vec4_t in, vec4_t out)
 754 {
 755         vec4_t temp;
 756         float iw;
 757         Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
 758         Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
 759         iw = 1.0f / out[3];
 760         out[0] = r_view.x + (out[0] * iw + 1.0f) * r_view.width * 0.5f;
 761         out[1] = r_view.y + r_view.height - (out[1] * iw + 1.0f) * r_view.height * 0.5f;
 762         out[2] = r_view.z + (out[2] * iw + 1.0f) * r_view.depth * 0.5f;
 763 }
 764
 765 // called at beginning of frame
 766 void R_Mesh_Start(void)
 767 {
 768         BACKENDACTIVECHECK
 769         CHECKGLERROR
 770         if (gl_printcheckerror.integer && !gl_paranoid.integer)
 771         {
 772                 Con_Printf("WARNING: gl_printcheckerror is on but gl_paranoid is off, turning it on...\n");
 773                 Cvar_SetValueQuick(&gl_paranoid, 1);
 774         }
 775         GL_Backend_ResetState();
 776 }
 777
 778 qboolean GL_Backend_CompileShader(int programobject, GLenum shadertypeenum, const char *shadertype, int numstrings, const char **strings)
 779 {
 780         int shaderobject;
 781         int shadercompiled;
 782         char compilelog[MAX_INPUTLINE];
 783         shaderobject = qglCreateShaderObjectARB(shadertypeenum);CHECKGLERROR
 784         if (!shaderobject)
 785                 return false;
 786         qglShaderSourceARB(shaderobject, numstrings, strings, NULL);CHECKGLERROR
 787         qglCompileShaderARB(shaderobject);CHECKGLERROR
 788         qglGetObjectParameterivARB(shaderobject, GL_OBJECT_COMPILE_STATUS_ARB, &shadercompiled);CHECKGLERROR
 789         qglGetInfoLogARB(shaderobject, sizeof(compilelog), NULL, compilelog);CHECKGLERROR
 790         if (compilelog[0])
 791                 Con_DPrintf("%s shader compile log:\n%s\n", shadertype, compilelog);
 792         if (!shadercompiled)
 793         {
 794                 qglDeleteObjectARB(shaderobject);CHECKGLERROR
 795                 return false;
 796         }
 797         qglAttachObjectARB(programobject, shaderobject);CHECKGLERROR
 798         qglDeleteObjectARB(shaderobject);CHECKGLERROR
 799         return true;
 800 }
 801
 802 unsigned int GL_Backend_CompileProgram(int vertexstrings_count, const char **vertexstrings_list, int geometrystrings_count, const char **geometrystrings_list, int fragmentstrings_count, const char **fragmentstrings_list)
 803 {
 804         GLint programlinked;
 805         GLuint programobject = 0;
 806         char linklog[MAX_INPUTLINE];
 807         CHECKGLERROR
 808
 809         programobject = qglCreateProgramObjectARB();CHECKGLERROR
 810         if (!programobject)
 811                 return 0;
 812
 813         if (vertexstrings_count && !GL_Backend_CompileShader(programobject, GL_VERTEX_SHADER_ARB, "vertex", vertexstrings_count, vertexstrings_list))
 814                 goto cleanup;
 815
 816 #ifdef GL_GEOMETRY_SHADER_ARB
 817         if (geometrystrings_count && !GL_Backend_CompileShader(programobject, GL_GEOMETRY_SHADER_ARB, "geometry", geometrystrings_count, geometrystrings_list))
 818                 goto cleanup;
 819 #endif
 820
 821         if (fragmentstrings_count && !GL_Backend_CompileShader(programobject, GL_FRAGMENT_SHADER_ARB, "fragment", fragmentstrings_count, fragmentstrings_list))
 822                 goto cleanup;
 823
 824         qglLinkProgramARB(programobject);CHECKGLERROR
 825         qglGetObjectParameterivARB(programobject, GL_OBJECT_LINK_STATUS_ARB, &programlinked);CHECKGLERROR
 826         qglGetInfoLogARB(programobject, sizeof(linklog), NULL, linklog);CHECKGLERROR
 827         if (linklog[0])
 828         {
 829                 Con_DPrintf("program link log:\n%s\n", linklog);
 830                 // software vertex shader is ok but software fragment shader is WAY
 831                 // too slow, fail program if so.
 832                 // NOTE: this string might be ATI specific, but that's ok because the
 833                 // ATI R300 chip (Radeon 9500-9800/X300) is the most likely to use a
 834                 // software fragment shader due to low instruction and dependent
 835                 // texture limits.
 836                 if (strstr(linklog, "fragment shader will run in software"))
 837                         programlinked = false;
 838         }
 839         if (!programlinked)
 840                 goto cleanup;
 841         return programobject;
 842 cleanup:
 843         qglDeleteObjectARB(programobject);CHECKGLERROR
 844         return 0;
 845 }
 846
 847 void GL_Backend_FreeProgram(unsigned int prog)
 848 {
 849         CHECKGLERROR
 850         qglDeleteObjectARB(prog);
 851         CHECKGLERROR
 852 }
 853
 854 int gl_backend_rebindtextures;
 855
 856 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
 857 {
 858         int i;
 859         if (offset)
 860         {
 861                 for (i = 0;i < count;i++)
 862                         *out++ = *in++ + offset;
 863         }
 864         else
 865                 memcpy(out, in, sizeof(*out) * count);
 866 }
 867
 868 // renders triangles using vertices from the active arrays
 869 int paranoidblah = 0;
 870 void R_Mesh_Draw(int firstvertex, int numvertices, int numtriangles, const int *elements)
 871 {
 872         int bufferobject = 0;
 873         size_t offset = 0;
 874         unsigned int numelements = numtriangles * 3;
 875         if (numvertices < 3 || numtriangles < 1)
 876         {
 877                 Con_Printf("R_Mesh_Draw(%d, %d, %d, %8p);\n", firstvertex, numvertices, numtriangles, elements);
 878                 return;
 879         }
 880         CHECKGLERROR
 881         r_refdef.stats.meshes++;
 882         r_refdef.stats.meshes_elements += numelements;
 883         if (gl_paranoid.integer)
 884         {
 885                 unsigned int i, j, size;
 886                 const int *p;
 887                 // note: there's no validation done here on buffer objects because it
 888                 // is somewhat difficult to get at the data, and gl_paranoid can be
 889                 // used without buffer objects if the need arises
 890                 // (the data could be gotten using glMapBuffer but it would be very
 891                 //  slow due to uncachable video memory reads)
 892                 if (!qglIsEnabled(GL_VERTEX_ARRAY))
 893                         Con_Print("R_Mesh_Draw: vertex array not enabled\n");
 894                 CHECKGLERROR
 895                 if (gl_state.pointer_vertex)
 896                         for (j = 0, size = numvertices * 3, p = (int *)((float *)gl_state.pointer_vertex + firstvertex * 3);j < size;j++, p++)
 897                                 paranoidblah += *p;
 898                 if (gl_state.pointer_color_enabled)
 899                 {
 900                         if (!qglIsEnabled(GL_COLOR_ARRAY))
 901                                 Con_Print("R_Mesh_Draw: color array set but not enabled\n");
 902                         CHECKGLERROR
 903                         if (gl_state.pointer_color && gl_state.pointer_color_enabled)
 904                                 for (j = 0, size = numvertices * 4, p = (int *)((float *)gl_state.pointer_color + firstvertex * 4);j < size;j++, p++)
 905                                         paranoidblah += *p;
 906                 }
 907                 for (i = 0;i < backendarrayunits;i++)
 908                 {
 909                         if (gl_state.units[i].arrayenabled)
 910                         {
 911                                 GL_ClientActiveTexture(i);
 912                                 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
 913                                         Con_Print("R_Mesh_Draw: texcoord array set but not enabled\n");
 914                                 CHECKGLERROR
 915                                 if (gl_state.units[i].pointer_texcoord && gl_state.units[i].arrayenabled)
 916                                         for (j = 0, size = numvertices * gl_state.units[i].arraycomponents, p = (int *)((float *)gl_state.units[i].pointer_texcoord + firstvertex * gl_state.units[i].arraycomponents);j < size;j++, p++)
 917                                                 paranoidblah += *p;
 918                         }
 919                 }
 920                 for (i = 0;i < (unsigned int) numtriangles * 3;i++)
 921                 {
 922                         if (elements[i] < firstvertex || elements[i] >= firstvertex + numvertices)
 923                         {
 924                                 Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in elements list\n", elements[i], firstvertex, firstvertex + numvertices);
 925                                 return;
 926                         }
 927                 }
 928                 CHECKGLERROR
 929         }
 930         if (r_render.integer)
 931         {
 932                 CHECKGLERROR
 933                 if (gl_mesh_testmanualfeeding.integer)
 934                 {
 935                         unsigned int i, j;
 936                         const GLfloat *p;
 937                         qglBegin(GL_TRIANGLES);
 938                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
 939                         {
 940                                 for (j = 0;j < backendarrayunits;j++)
 941                                 {
 942                                         if (gl_state.units[j].pointer_texcoord && gl_state.units[j].arrayenabled)
 943                                         {
 944                                                 if (backendarrayunits > 1)
 945                                                 {
 946                                                         if (gl_state.units[j].arraycomponents == 4)
 947                                                         {
 948                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 4;
 949                                                                 qglMultiTexCoord4f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2], p[3]);
 950                                                         }
 951                                                         else if (gl_state.units[j].arraycomponents == 3)
 952                                                         {
 953                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
 954                                                                 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
 955                                                         }
 956                                                         else if (gl_state.units[j].arraycomponents == 2)
 957                                                         {
 958                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
 959                                                                 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
 960                                                         }
 961                                                         else
 962                                                         {
 963                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 1;
 964                                                                 qglMultiTexCoord1f(GL_TEXTURE0_ARB + j, p[0]);
 965                                                         }
 966                                                 }
 967                                                 else
 968                                                 {
 969                                                         if (gl_state.units[j].arraycomponents == 4)
 970                                                         {
 971                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 4;
 972                                                                 qglTexCoord4f(p[0], p[1], p[2], p[3]);
 973                                                         }
 974                                                         else if (gl_state.units[j].arraycomponents == 3)
 975                                                         {
 976                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 3;
 977                                                                 qglTexCoord3f(p[0], p[1], p[2]);
 978                                                         }
 979                                                         else if (gl_state.units[j].arraycomponents == 2)
 980                                                         {
 981                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 2;
 982                                                                 qglTexCoord2f(p[0], p[1]);
 983                                                         }
 984                                                         else
 985                                                         {
 986                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + elements[i] * 1;
 987                                                                 qglTexCoord1f(p[0]);
 988                                                         }
 989                                                 }
 990                                         }
 991                                 }
 992                                 if (gl_state.pointer_color && gl_state.pointer_color_enabled)
 993                                 {
 994                                         p = ((const GLfloat *)(gl_state.pointer_color)) + elements[i] * 4;
 995                                         qglColor4f(p[0], p[1], p[2], p[3]);
 996                                 }
 997                                 p = ((const GLfloat *)(gl_state.pointer_vertex)) + elements[i] * 3;
 998                                 qglVertex3f(p[0], p[1], p[2]);
 999                         }
1000                         qglEnd();
1001                         CHECKGLERROR
1002                 }
1003                 else if (gl_mesh_testarrayelement.integer)
1004                 {
1005                         int i;
1006                         qglBegin(GL_TRIANGLES);
1007                         for (i = 0;i < numtriangles * 3;i++)
1008                         {
1009                                 qglArrayElement(elements[i]);
1010                         }
1011                         qglEnd();
1012                         CHECKGLERROR
1013                 }
1014                 else if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1015                 {
1016                         GL_BindEBO(bufferobject);
1017                         qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_INT, bufferobject ? (void *)offset : elements);
1018                         CHECKGLERROR
1019                 }
1020                 else
1021                 {
1022                         GL_BindEBO(bufferobject);
1023                         qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, bufferobject ? (void *)offset : elements);
1024                         CHECKGLERROR
1025                 }
1026         }
1027 }
1028
1029 // restores backend state, used when done with 3D rendering
1030 void R_Mesh_Finish(void)
1031 {
1032         unsigned int i;
1033         BACKENDACTIVECHECK
1034         CHECKGLERROR
1035         GL_LockArrays(0, 0);
1036         CHECKGLERROR
1037
1038         for (i = 0;i < backendimageunits;i++)
1039         {
1040                 GL_ActiveTexture(i);
1041                 qglBindTexture(GL_TEXTURE_1D, 0);CHECKGLERROR
1042                 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
1043                 if (gl_texture3d)
1044                 {
1045                         qglBindTexture(GL_TEXTURE_3D, 0);CHECKGLERROR
1046                 }
1047                 if (gl_texturecubemap)
1048                 {
1049                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);CHECKGLERROR
1050                 }
1051         }
1052         for (i = 0;i < backendarrayunits;i++)
1053         {
1054                 GL_ActiveTexture(backendarrayunits - 1 - i);
1055                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1056         }
1057         for (i = 0;i < backendunits;i++)
1058         {
1059                 GL_ActiveTexture(backendunits - 1 - i);
1060                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1061                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1062                 if (gl_texture3d)
1063                 {
1064                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1065                 }
1066                 if (gl_texturecubemap)
1067                 {
1068                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1069                 }
1070                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
1071                 if (gl_combine.integer)
1072                 {
1073                         qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
1074                         qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
1075                 }
1076         }
1077         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1078         qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
1079
1080         qglDisable(GL_BLEND);CHECKGLERROR
1081         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
1082         qglDepthMask(GL_TRUE);CHECKGLERROR
1083         qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
1084 }
1085
1086 void R_Mesh_Matrix(const matrix4x4_t *matrix)
1087 {
1088         if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
1089         {
1090                 double glmatrix[16];
1091                 backend_modelmatrix = *matrix;
1092                 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
1093                 Matrix4x4_ToArrayDoubleGL(&backend_modelviewmatrix, glmatrix);
1094                 CHECKGLERROR
1095                 qglLoadMatrixd(glmatrix);CHECKGLERROR
1096         }
1097 }
1098
1099 void R_Mesh_VertexPointer(const float *vertex3f)
1100 {
1101         int bufferobject = 0;
1102         size_t offset = 0;
1103         if (gl_state.pointer_vertex != vertex3f || gl_state.pointer_vertex_buffer != bufferobject || gl_state.pointer_vertex_offset != offset)
1104         {
1105                 gl_state.pointer_vertex = vertex3f;
1106                 gl_state.pointer_vertex_buffer = bufferobject;
1107                 gl_state.pointer_vertex_offset = offset;
1108                 CHECKGLERROR
1109                 GL_BindVBO(bufferobject);
1110                 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), bufferobject ? (void *)offset : vertex3f);CHECKGLERROR
1111         }
1112 }
1113
1114 void R_Mesh_ColorPointer(const float *color4f)
1115 {
1116         int bufferobject = 0;
1117         size_t offset = 0;
1118         if (color4f || bufferobject)
1119         {
1120                 // caller wants color array enabled
1121                 if (!gl_state.pointer_color_enabled)
1122                 {
1123                         gl_state.pointer_color_enabled = true;
1124                         CHECKGLERROR
1125                         qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1126                 }
1127                 if (gl_state.pointer_color != color4f || gl_state.pointer_color_buffer != bufferobject || gl_state.pointer_color_offset != offset)
1128                 {
1129                         gl_state.pointer_color = color4f;
1130                         gl_state.pointer_color_buffer = bufferobject;
1131                         gl_state.pointer_color_offset = offset;
1132                         CHECKGLERROR
1133                         GL_BindVBO(bufferobject);
1134                         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), bufferobject ? (void *)offset : color4f);CHECKGLERROR
1135                 }
1136         }
1137         else
1138         {
1139                 // caller wants color array disabled
1140                 if (gl_state.pointer_color_enabled)
1141                 {
1142                         gl_state.pointer_color_enabled = false;
1143                         CHECKGLERROR
1144                         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1145                         // when color array is on the glColor gets trashed, set it again
1146                         qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);CHECKGLERROR
1147                 }
1148         }
1149 }
1150
1151 void R_Mesh_TexCoordPointer(unsigned int unitnum, unsigned int numcomponents, const float *texcoord)
1152 {
1153         int bufferobject = 0;
1154         size_t offset;
1155         gltextureunit_t *unit = gl_state.units + unitnum;
1156         // update array settings
1157         CHECKGLERROR
1158         if (texcoord || bufferobject)
1159         {
1160                 // texture array unit is enabled, enable the array
1161                 if (!unit->arrayenabled)
1162                 {
1163                         unit->arrayenabled = true;
1164                         GL_ClientActiveTexture(unitnum);
1165                         qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1166                 }
1167                 // texcoord array
1168                 if (unit->pointer_texcoord != texcoord || unit->pointer_texcoord_buffer != bufferobject || unit->pointer_texcoord_offset != offset || unit->arraycomponents != numcomponents)
1169                 {
1170                         unit->pointer_texcoord = texcoord;
1171                         unit->pointer_texcoord_buffer = bufferobject;
1172                         unit->pointer_texcoord_offset = offset;
1173                         unit->arraycomponents = numcomponents;
1174                         GL_ClientActiveTexture(unitnum);
1175                         GL_BindVBO(bufferobject);
1176                         qglTexCoordPointer(unit->arraycomponents, GL_FLOAT, sizeof(float) * unit->arraycomponents, bufferobject ? (void *)offset : texcoord);CHECKGLERROR
1177                 }
1178         }
1179         else
1180         {
1181                 // texture array unit is disabled, disable the array
1182                 if (unit->arrayenabled)
1183                 {
1184                         unit->arrayenabled = false;
1185                         GL_ClientActiveTexture(unitnum);
1186                         qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1187                 }
1188         }
1189 }
1190
1191 void R_Mesh_TexBindAll(unsigned int unitnum, int tex1d, int tex2d, int tex3d, int texcubemap)
1192 {
1193         gltextureunit_t *unit = gl_state.units + unitnum;
1194         if (unitnum >= backendimageunits)
1195                 return;
1196         // update 1d texture binding
1197         if (unit->t1d != tex1d)
1198         {
1199                 GL_ActiveTexture(unitnum);
1200                 if (unitnum < backendunits)
1201                 {
1202                         if (tex1d)
1203                         {
1204                                 if (unit->t1d == 0)
1205                                 {
1206                                         qglEnable(GL_TEXTURE_1D);CHECKGLERROR
1207                                 }
1208                         }
1209                         else
1210                         {
1211                                 if (unit->t1d)
1212                                 {
1213                                         qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1214                                 }
1215                         }
1216                 }
1217                 unit->t1d = tex1d;
1218                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1219         }
1220         // update 2d texture binding
1221         if (unit->t2d != tex2d)
1222         {
1223                 GL_ActiveTexture(unitnum);
1224                 if (unitnum < backendunits)
1225                 {
1226                         if (tex2d)
1227                         {
1228                                 if (unit->t2d == 0)
1229                                 {
1230                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1231                                 }
1232                         }
1233                         else
1234                         {
1235                                 if (unit->t2d)
1236                                 {
1237                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1238                                 }
1239                         }
1240                 }
1241                 unit->t2d = tex2d;
1242                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1243         }
1244         // update 3d texture binding
1245         if (unit->t3d != tex3d)
1246         {
1247                 GL_ActiveTexture(unitnum);
1248                 if (unitnum < backendunits)
1249                 {
1250                         if (tex3d)
1251                         {
1252                                 if (unit->t3d == 0)
1253                                 {
1254                                         qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1255                                 }
1256                         }
1257                         else
1258                         {
1259                                 if (unit->t3d)
1260                                 {
1261                                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1262                                 }
1263                         }
1264                 }
1265                 unit->t3d = tex3d;
1266                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1267         }
1268         // update cubemap texture binding
1269         if (unit->tcubemap != texcubemap)
1270         {
1271                 GL_ActiveTexture(unitnum);
1272                 if (unitnum < backendunits)
1273                 {
1274                         if (texcubemap)
1275                         {
1276                                 if (unit->tcubemap == 0)
1277                                 {
1278                                         qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1279                                 }
1280                         }
1281                         else
1282                         {
1283                                 if (unit->tcubemap)
1284                                 {
1285                                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1286                                 }
1287                         }
1288                 }
1289                 unit->tcubemap = texcubemap;
1290                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1291         }
1292 }
1293
1294 void R_Mesh_TexBind1D(unsigned int unitnum, int texnum)
1295 {
1296         gltextureunit_t *unit = gl_state.units + unitnum;
1297         if (unitnum >= backendimageunits)
1298                 return;
1299         // update 1d texture binding
1300         if (unit->t1d != texnum)
1301         {
1302                 GL_ActiveTexture(unitnum);
1303                 if (unitnum < backendunits)
1304                 {
1305                         if (texnum)
1306                         {
1307                                 if (unit->t1d == 0)
1308                                 {
1309                                         qglEnable(GL_TEXTURE_1D);CHECKGLERROR
1310                                 }
1311                         }
1312                         else
1313                         {
1314                                 if (unit->t1d)
1315                                 {
1316                                         qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1317                                 }
1318                         }
1319                 }
1320                 unit->t1d = texnum;
1321                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1322         }
1323         // update 2d texture binding
1324         if (unit->t2d)
1325         {
1326                 GL_ActiveTexture(unitnum);
1327                 if (unitnum < backendunits)
1328                 {
1329                         if (unit->t2d)
1330                         {
1331                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1332                         }
1333                 }
1334                 unit->t2d = 0;
1335                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1336         }
1337         // update 3d texture binding
1338         if (unit->t3d)
1339         {
1340                 GL_ActiveTexture(unitnum);
1341                 if (unitnum < backendunits)
1342                 {
1343                         if (unit->t3d)
1344                         {
1345                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1346                         }
1347                 }
1348                 unit->t3d = 0;
1349                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1350         }
1351         // update cubemap texture binding
1352         if (unit->tcubemap)
1353         {
1354                 GL_ActiveTexture(unitnum);
1355                 if (unitnum < backendunits)
1356                 {
1357                         if (unit->tcubemap)
1358                         {
1359                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1360                         }
1361                 }
1362                 unit->tcubemap = 0;
1363                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1364         }
1365 }
1366
1367 void R_Mesh_TexBind(unsigned int unitnum, int texnum)
1368 {
1369         gltextureunit_t *unit = gl_state.units + unitnum;
1370         if (unitnum >= backendimageunits)
1371                 return;
1372         // update 1d texture binding
1373         if (unit->t1d)
1374         {
1375                 GL_ActiveTexture(unitnum);
1376                 if (unitnum < backendunits)
1377                 {
1378                         if (unit->t1d)
1379                         {
1380                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1381                         }
1382                 }
1383                 unit->t1d = 0;
1384                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1385         }
1386         // update 2d texture binding
1387         if (unit->t2d != texnum)
1388         {
1389                 GL_ActiveTexture(unitnum);
1390                 if (unitnum < backendunits)
1391                 {
1392                         if (texnum)
1393                         {
1394                                 if (unit->t2d == 0)
1395                                 {
1396                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1397                                 }
1398                         }
1399                         else
1400                         {
1401                                 if (unit->t2d)
1402                                 {
1403                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1404                                 }
1405                         }
1406                 }
1407                 unit->t2d = texnum;
1408                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1409         }
1410         // update 3d texture binding
1411         if (unit->t3d)
1412         {
1413                 GL_ActiveTexture(unitnum);
1414                 if (unitnum < backendunits)
1415                 {
1416                         if (unit->t3d)
1417                         {
1418                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1419                         }
1420                 }
1421                 unit->t3d = 0;
1422                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1423         }
1424         // update cubemap texture binding
1425         if (unit->tcubemap != 0)
1426         {
1427                 GL_ActiveTexture(unitnum);
1428                 if (unitnum < backendunits)
1429                 {
1430                         if (unit->tcubemap)
1431                         {
1432                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1433                         }
1434                 }
1435                 unit->tcubemap = 0;
1436                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1437         }
1438 }
1439
1440 void R_Mesh_TexBind3D(unsigned int unitnum, int texnum)
1441 {
1442         gltextureunit_t *unit = gl_state.units + unitnum;
1443         if (unitnum >= backendimageunits)
1444                 return;
1445         // update 1d texture binding
1446         if (unit->t1d)
1447         {
1448                 GL_ActiveTexture(unitnum);
1449                 if (unitnum < backendunits)
1450                 {
1451                         if (unit->t1d)
1452                         {
1453                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1454                         }
1455                 }
1456                 unit->t1d = 0;
1457                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1458         }
1459         // update 2d texture binding
1460         if (unit->t2d)
1461         {
1462                 GL_ActiveTexture(unitnum);
1463                 if (unitnum < backendunits)
1464                 {
1465                         if (unit->t2d)
1466                         {
1467                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1468                         }
1469                 }
1470                 unit->t2d = 0;
1471                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1472         }
1473         // update 3d texture binding
1474         if (unit->t3d != texnum)
1475         {
1476                 GL_ActiveTexture(unitnum);
1477                 if (unitnum < backendunits)
1478                 {
1479                         if (texnum)
1480                         {
1481                                 if (unit->t3d == 0)
1482                                 {
1483                                         qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1484                                 }
1485                         }
1486                         else
1487                         {
1488                                 if (unit->t3d)
1489                                 {
1490                                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1491                                 }
1492                         }
1493                 }
1494                 unit->t3d = texnum;
1495                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1496         }
1497         // update cubemap texture binding
1498         if (unit->tcubemap != 0)
1499         {
1500                 GL_ActiveTexture(unitnum);
1501                 if (unitnum < backendunits)
1502                 {
1503                         if (unit->tcubemap)
1504                         {
1505                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1506                         }
1507                 }
1508                 unit->tcubemap = 0;
1509                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1510         }
1511 }
1512
1513 void R_Mesh_TexBindCubeMap(unsigned int unitnum, int texnum)
1514 {
1515         gltextureunit_t *unit = gl_state.units + unitnum;
1516         if (unitnum >= backendimageunits)
1517                 return;
1518         // update 1d texture binding
1519         if (unit->t1d)
1520         {
1521                 GL_ActiveTexture(unitnum);
1522                 if (unitnum < backendunits)
1523                 {
1524                         if (unit->t1d)
1525                         {
1526                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1527                         }
1528                 }
1529                 unit->t1d = 0;
1530                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1531         }
1532         // update 2d texture binding
1533         if (unit->t2d)
1534         {
1535                 GL_ActiveTexture(unitnum);
1536                 if (unitnum < backendunits)
1537                 {
1538                         if (unit->t2d)
1539                         {
1540                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1541                         }
1542                 }
1543                 unit->t2d = 0;
1544                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1545         }
1546         // update 3d texture binding
1547         if (unit->t3d)
1548         {
1549                 GL_ActiveTexture(unitnum);
1550                 if (unitnum < backendunits)
1551                 {
1552                         if (unit->t3d)
1553                         {
1554                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1555                         }
1556                 }
1557                 unit->t3d = 0;
1558                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1559         }
1560         // update cubemap texture binding
1561         if (unit->tcubemap != texnum)
1562         {
1563                 GL_ActiveTexture(unitnum);
1564                 if (unitnum < backendunits)
1565                 {
1566                         if (texnum)
1567                         {
1568                                 if (unit->tcubemap == 0)
1569                                 {
1570                                         qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1571                                 }
1572                         }
1573                         else
1574                         {
1575                                 if (unit->tcubemap)
1576                                 {
1577                                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1578                                 }
1579                         }
1580                 }
1581                 unit->tcubemap = texnum;
1582                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1583         }
1584 }
1585
1586 void R_Mesh_TexMatrix(unsigned int unitnum, const matrix4x4_t *matrix)
1587 {
1588         gltextureunit_t *unit = gl_state.units + unitnum;
1589         if (matrix->m[3][3])
1590         {
1591                 // texmatrix specified, check if it is different
1592                 if (!unit->texmatrixenabled || memcmp(&unit->matrix, matrix, sizeof(matrix4x4_t)))
1593                 {
1594                         double glmatrix[16];
1595                         unit->texmatrixenabled = true;
1596                         unit->matrix = *matrix;
1597                         CHECKGLERROR
1598                         Matrix4x4_ToArrayDoubleGL(&unit->matrix, glmatrix);
1599                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1600                         GL_ActiveTexture(unitnum);
1601                         qglLoadMatrixd(glmatrix);CHECKGLERROR
1602                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1603                 }
1604         }
1605         else
1606         {
1607                 // no texmatrix specified, revert to identity
1608                 if (unit->texmatrixenabled)
1609                 {
1610                         unit->texmatrixenabled = false;
1611                         CHECKGLERROR
1612                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1613                         GL_ActiveTexture(unitnum);
1614                         qglLoadIdentity();CHECKGLERROR
1615                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1616                 }
1617         }
1618 }
1619
1620 void R_Mesh_TexCombine(unsigned int unitnum, int combinergb, int combinealpha, int rgbscale, int alphascale)
1621 {
1622         gltextureunit_t *unit = gl_state.units + unitnum;
1623         CHECKGLERROR
1624         if (gl_combine.integer)
1625         {
1626                 // GL_ARB_texture_env_combine
1627                 if (!combinergb)
1628                         combinergb = GL_MODULATE;
1629                 if (!combinealpha)
1630                         combinealpha = GL_MODULATE;
1631                 if (!rgbscale)
1632                         rgbscale = 1;
1633                 if (!alphascale)
1634                         alphascale = 1;
1635                 if (unit->combinergb != combinergb)
1636                 {
1637                         unit->combinergb = combinergb;
1638                         GL_ActiveTexture(unitnum);
1639                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
1640                 }
1641                 if (unit->combinealpha != combinealpha)
1642                 {
1643                         unit->combinealpha = combinealpha;
1644                         GL_ActiveTexture(unitnum);
1645                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
1646                 }
1647                 if (unit->rgbscale != rgbscale)
1648                 {
1649                         GL_ActiveTexture(unitnum);
1650                         qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = rgbscale));CHECKGLERROR
1651                 }
1652                 if (unit->alphascale != alphascale)
1653                 {
1654                         GL_ActiveTexture(unitnum);
1655                         qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = alphascale));CHECKGLERROR
1656                 }
1657         }
1658         else
1659         {
1660                 // normal GL texenv
1661                 if (!combinergb)
1662                         combinergb = GL_MODULATE;
1663                 if (unit->combinergb != combinergb)
1664                 {
1665                         unit->combinergb = combinergb;
1666                         GL_ActiveTexture(unitnum);
1667                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
1668                 }
1669         }
1670 }
1671
1672 void R_Mesh_TextureState(const rmeshstate_t *m)
1673 {
1674         unsigned int i;
1675
1676         BACKENDACTIVECHECK
1677
1678         CHECKGLERROR
1679         if (gl_backend_rebindtextures)
1680         {
1681                 gl_backend_rebindtextures = false;
1682                 GL_SetupTextureState();
1683                 CHECKGLERROR
1684         }
1685
1686         for (i = 0;i < backendimageunits;i++)
1687                 R_Mesh_TexBindAll(i, m->tex1d[i], m->tex[i], m->tex3d[i], m->texcubemap[i]);
1688         for (i = 0;i < backendarrayunits;i++)
1689         {
1690                 if (m->pointer_texcoord3f[i])
1691                         R_Mesh_TexCoordPointer(i, 3, m->pointer_texcoord3f[i]);
1692                 else
1693                         R_Mesh_TexCoordPointer(i, 2, m->pointer_texcoord[i]);
1694         }
1695         for (i = 0;i < backendunits;i++)
1696         {
1697                 R_Mesh_TexMatrix(i, &m->texmatrix[i]);
1698                 R_Mesh_TexCombine(i, m->texcombinergb[i], m->texcombinealpha[i], m->texrgbscale[i], m->texalphascale[i]);
1699         }
1700         CHECKGLERROR
1701 }
1702
1703 void R_Mesh_ResetTextureState(void)
1704 {
1705         unsigned int unitnum;
1706
1707         BACKENDACTIVECHECK
1708
1709         CHECKGLERROR
1710         if (gl_backend_rebindtextures)
1711         {
1712                 gl_backend_rebindtextures = false;
1713                 GL_SetupTextureState();
1714                 CHECKGLERROR
1715         }
1716
1717         for (unitnum = 0;unitnum < backendimageunits;unitnum++)
1718         {
1719                 gltextureunit_t *unit = gl_state.units + unitnum;
1720                 // update 1d texture binding
1721                 if (unit->t1d)
1722                 {
1723                         GL_ActiveTexture(unitnum);
1724                         if (unitnum < backendunits)
1725                         {
1726                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1727                         }
1728                         unit->t1d = 0;
1729                         qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1730                 }
1731                 // update 2d texture binding
1732                 if (unit->t2d)
1733                 {
1734                         GL_ActiveTexture(unitnum);
1735                         if (unitnum < backendunits)
1736                         {
1737                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1738                         }
1739                         unit->t2d = 0;
1740                         qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1741                 }
1742                 // update 3d texture binding
1743                 if (unit->t3d)
1744                 {
1745                         GL_ActiveTexture(unitnum);
1746                         if (unitnum < backendunits)
1747                         {
1748                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1749                         }
1750                         unit->t3d = 0;
1751                         qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1752                 }
1753                 // update cubemap texture binding
1754                 if (unit->tcubemap)
1755                 {
1756                         GL_ActiveTexture(unitnum);
1757                         if (unitnum < backendunits)
1758                         {
1759                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1760                         }
1761                         unit->tcubemap = 0;
1762                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1763                 }
1764         }
1765         for (unitnum = 0;unitnum < backendarrayunits;unitnum++)
1766         {
1767                 gltextureunit_t *unit = gl_state.units + unitnum;
1768                 // texture array unit is disabled, disable the array
1769                 if (unit->arrayenabled)
1770                 {
1771                         unit->arrayenabled = false;
1772                         GL_ClientActiveTexture(unitnum);
1773                         qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1774                 }
1775         }
1776         for (unitnum = 0;unitnum < backendunits;unitnum++)
1777         {
1778                 gltextureunit_t *unit = gl_state.units + unitnum;
1779                 // no texmatrix specified, revert to identity
1780                 if (unit->texmatrixenabled)
1781                 {
1782                         unit->texmatrixenabled = false;
1783                         CHECKGLERROR
1784                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1785                         GL_ActiveTexture(unitnum);
1786                         qglLoadIdentity();CHECKGLERROR
1787                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1788                 }
1789                 if (gl_combine.integer)
1790                 {
1791                         // GL_ARB_texture_env_combine
1792                         if (unit->combinergb != GL_MODULATE)
1793                         {
1794                                 unit->combinergb = GL_MODULATE;
1795                                 GL_ActiveTexture(unitnum);
1796                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
1797                         }
1798                         if (unit->combinealpha != GL_MODULATE)
1799                         {
1800                                 unit->combinealpha = GL_MODULATE;
1801                                 GL_ActiveTexture(unitnum);
1802                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
1803                         }
1804                         if (unit->rgbscale != 1)
1805                         {
1806                                 GL_ActiveTexture(unitnum);
1807                                 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = 1));CHECKGLERROR
1808                         }
1809                         if (unit->alphascale != 1)
1810                         {
1811                                 GL_ActiveTexture(unitnum);
1812                                 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = 1));CHECKGLERROR
1813                         }
1814                 }
1815                 else
1816                 {
1817                         // normal GL texenv
1818                         if (unit->combinergb != GL_MODULATE)
1819                         {
1820                                 unit->combinergb = GL_MODULATE;
1821                                 GL_ActiveTexture(unitnum);
1822                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
1823                         }
1824                 }
1825         }
1826 }
1827
1828 void R_Mesh_Draw_ShowTris(int firstvertex, int numvertices, int numtriangles, const int *elements)
1829 {
1830         CHECKGLERROR
1831         qglBegin(GL_LINES);
1832         for (;numtriangles;numtriangles--, elements += 3)
1833         {
1834                 qglArrayElement(elements[0]);qglArrayElement(elements[1]);
1835                 qglArrayElement(elements[1]);qglArrayElement(elements[2]);
1836                 qglArrayElement(elements[2]);qglArrayElement(elements[0]);
1837         }
1838         qglEnd();
1839         CHECKGLERROR
1840 }