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_mesh_prefer_short_elements = {0, "gl_mesh_prefer_short_elements", "1", "use GL_UNSIGNED_SHORT element arrays instead of GL_UNSIGNED_INT"};
   9 cvar_t gl_workaround_mac_texmatrix = {0, "gl_workaround_mac_texmatrix", "0", "if set to 1 this uses glLoadMatrixd followed by glLoadIdentity to clear a texture matrix (normally glLoadIdentity is sufficient by itself), if set to 2 it uses glLoadMatrixd without glLoadIdentity"};
  10 cvar_t gl_paranoid = {0, "gl_paranoid", "0", "enables OpenGL error checking and other tests"};
  11 cvar_t gl_printcheckerror = {0, "gl_printcheckerror", "0", "prints all OpenGL error checks, useful to identify location of driver crashes"};
  12
  13 cvar_t r_render = {0, "r_render", "1", "enables rendering calls (you want this on!)"};
  14 cvar_t r_waterwarp = {CVAR_SAVE, "r_waterwarp", "1", "warp view while underwater"};
  15 cvar_t gl_polyblend = {CVAR_SAVE, "gl_polyblend", "1", "tints view while underwater, hurt, etc"};
  16 cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1", "enables OpenGL dithering (16bit looks bad with this off)"};
  17 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"};
  18 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"};
  19 cvar_t gl_vbo = {CVAR_SAVE, "gl_vbo", "1", "make use of GL_ARB_vertex_buffer_object extension to store static geometry in video memory for faster rendering"};
  20
  21 cvar_t v_flipped = {0, "v_flipped", "0", "mirror the screen (poor man's left handed mode)"};
  22 qboolean v_flipped_state = false;
  23
  24 int gl_maxdrawrangeelementsvertices;
  25 int gl_maxdrawrangeelementsindices;
  26
  27 #ifdef DEBUGGL
  28 int errornumber = 0;
  29
  30 void GL_PrintError(int errornumber, char *filename, int linenumber)
  31 {
  32         switch(errornumber)
  33         {
  34 #ifdef GL_INVALID_ENUM
  35         case GL_INVALID_ENUM:
  36                 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
  37                 break;
  38 #endif
  39 #ifdef GL_INVALID_VALUE
  40         case GL_INVALID_VALUE:
  41                 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
  42                 break;
  43 #endif
  44 #ifdef GL_INVALID_OPERATION
  45         case GL_INVALID_OPERATION:
  46                 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
  47                 break;
  48 #endif
  49 #ifdef GL_STACK_OVERFLOW
  50         case GL_STACK_OVERFLOW:
  51                 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
  52                 break;
  53 #endif
  54 #ifdef GL_STACK_UNDERFLOW
  55         case GL_STACK_UNDERFLOW:
  56                 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
  57                 break;
  58 #endif
  59 #ifdef GL_OUT_OF_MEMORY
  60         case GL_OUT_OF_MEMORY:
  61                 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
  62                 break;
  63 #endif
  64 #ifdef GL_TABLE_TOO_LARGE
  65         case GL_TABLE_TOO_LARGE:
  66                 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
  67                 break;
  68 #endif
  69         default:
  70                 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
  71                 break;
  72         }
  73 }
  74 #endif
  75
  76 #define BACKENDACTIVECHECK if (!backendactive) Sys_Error("GL backend function called when backend is not active");
  77
  78 void SCR_ScreenShot_f (void);
  79
  80 static matrix4x4_t backend_viewmatrix;
  81 static matrix4x4_t backend_modelmatrix;
  82 static matrix4x4_t backend_modelviewmatrix;
  83 static matrix4x4_t backend_projectmatrix;
  84
  85 static unsigned int backendunits, backendimageunits, backendarrayunits, backendactive;
  86
  87 /*
  88 note: here's strip order for a terrain row:
  89 0--1--2--3--4
  90 |\ |\ |\ |\ |
  91 | \| \| \| \|
  92 A--B--C--D--E
  93 clockwise
  94
  95 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
  96
  97 *elements++ = i + row;
  98 *elements++ = i;
  99 *elements++ = i + row + 1;
 100 *elements++ = i;
 101 *elements++ = i + 1;
 102 *elements++ = i + row + 1;
 103
 104
 105 for (y = 0;y < rows - 1;y++)
 106 {
 107         for (x = 0;x < columns - 1;x++)
 108         {
 109                 i = y * rows + x;
 110                 *elements++ = i + columns;
 111                 *elements++ = i;
 112                 *elements++ = i + columns + 1;
 113                 *elements++ = i;
 114                 *elements++ = i + 1;
 115                 *elements++ = i + columns + 1;
 116         }
 117 }
 118
 119 alternative:
 120 0--1--2--3--4
 121 | /| /|\ | /|
 122 |/ |/ | \|/ |
 123 A--B--C--D--E
 124 counterclockwise
 125
 126 for (y = 0;y < rows - 1;y++)
 127 {
 128         for (x = 0;x < columns - 1;x++)
 129         {
 130                 i = y * rows + x;
 131                 *elements++ = i;
 132                 *elements++ = i + columns;
 133                 *elements++ = i + columns + 1;
 134                 *elements++ = i + columns;
 135                 *elements++ = i + columns + 1;
 136                 *elements++ = i + 1;
 137         }
 138 }
 139 */
 140
 141 unsigned short polygonelements[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 142 unsigned short quadelements[QUADELEMENTS_MAXQUADS*6];
 143
 144 void GL_Backend_AllocArrays(void)
 145 {
 146 }
 147
 148 void GL_Backend_FreeArrays(void)
 149 {
 150 }
 151
 152 void GL_VBOStats_f(void)
 153 {
 154         GL_Mesh_ListVBOs(true);
 155 }
 156
 157 typedef struct gl_bufferobjectinfo_s
 158 {
 159         int target;
 160         int object;
 161         size_t size;
 162         char name[MAX_QPATH];
 163 }
 164 gl_bufferobjectinfo_t;
 165
 166 memexpandablearray_t gl_bufferobjectinfoarray;
 167
 168 static void gl_backend_start(void)
 169 {
 170         CHECKGLERROR
 171
 172         if (qglDrawRangeElements != NULL)
 173         {
 174                 CHECKGLERROR
 175                 qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
 176                 CHECKGLERROR
 177                 qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
 178                 CHECKGLERROR
 179                 Con_DPrintf("GL_MAX_ELEMENTS_VERTICES = %i\nGL_MAX_ELEMENTS_INDICES = %i\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
 180         }
 181
 182         backendunits = bound(1, gl_textureunits, MAX_TEXTUREUNITS);
 183         backendimageunits = backendunits;
 184         backendarrayunits = backendunits;
 185         if (gl_support_fragment_shader)
 186         {
 187                 CHECKGLERROR
 188                 qglGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS_ARB, (int *)&backendimageunits);
 189                 CHECKGLERROR
 190                 qglGetIntegerv(GL_MAX_TEXTURE_COORDS_ARB, (int *)&backendarrayunits);
 191                 CHECKGLERROR
 192                 Con_DPrintf("GLSL shader support detected: texture units = %i texenv, %i image, %i array\n", backendunits, backendimageunits, backendarrayunits);
 193                 backendimageunits = bound(1, backendimageunits, MAX_TEXTUREUNITS);
 194                 backendarrayunits = bound(1, backendarrayunits, MAX_TEXTUREUNITS);
 195         }
 196         else
 197                 Con_DPrintf("GL_MAX_TEXTUREUNITS = %i\n", backendunits);
 198
 199         GL_Backend_AllocArrays();
 200
 201         Mem_ExpandableArray_NewArray(&gl_bufferobjectinfoarray, r_main_mempool, sizeof(gl_bufferobjectinfo_t), 128);
 202
 203         Con_DPrintf("OpenGL backend started.\n");
 204
 205         CHECKGLERROR
 206
 207         backendactive = true;
 208 }
 209
 210 static void gl_backend_shutdown(void)
 211 {
 212         backendunits = 0;
 213         backendimageunits = 0;
 214         backendarrayunits = 0;
 215         backendactive = false;
 216
 217         Con_DPrint("OpenGL Backend shutting down\n");
 218
 219         Mem_ExpandableArray_FreeArray(&gl_bufferobjectinfoarray);
 220
 221         GL_Backend_FreeArrays();
 222 }
 223
 224 static void gl_backend_newmap(void)
 225 {
 226 }
 227
 228 void gl_backend_init(void)
 229 {
 230         int i;
 231
 232         for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
 233         {
 234                 polygonelements[i * 3 + 0] = 0;
 235                 polygonelements[i * 3 + 1] = i + 1;
 236                 polygonelements[i * 3 + 2] = i + 2;
 237         }
 238         // elements for rendering a series of quads as triangles
 239         for (i = 0;i < QUADELEMENTS_MAXQUADS;i++)
 240         {
 241                 quadelements[i * 6 + 0] = i * 4;
 242                 quadelements[i * 6 + 1] = i * 4 + 1;
 243                 quadelements[i * 6 + 2] = i * 4 + 2;
 244                 quadelements[i * 6 + 3] = i * 4;
 245                 quadelements[i * 6 + 4] = i * 4 + 2;
 246                 quadelements[i * 6 + 5] = i * 4 + 3;
 247         }
 248
 249         Cvar_RegisterVariable(&r_render);
 250         Cvar_RegisterVariable(&r_waterwarp);
 251         Cvar_RegisterVariable(&gl_polyblend);
 252         Cvar_RegisterVariable(&v_flipped);
 253         Cvar_RegisterVariable(&gl_dither);
 254         Cvar_RegisterVariable(&gl_lockarrays);
 255         Cvar_RegisterVariable(&gl_lockarrays_minimumvertices);
 256         Cvar_RegisterVariable(&gl_vbo);
 257         Cvar_RegisterVariable(&gl_paranoid);
 258         Cvar_RegisterVariable(&gl_printcheckerror);
 259         Cvar_RegisterVariable(&gl_workaround_mac_texmatrix);
 260 #ifdef NORENDER
 261         Cvar_SetValue("r_render", 0);
 262 #endif
 263
 264         Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
 265         Cvar_RegisterVariable(&gl_mesh_testarrayelement);
 266         Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
 267         Cvar_RegisterVariable(&gl_mesh_prefer_short_elements);
 268
 269         Cmd_AddCommand("gl_vbostats", GL_VBOStats_f, "prints a list of all buffer objects (vertex data and triangle elements) and total video memory used by them");
 270
 271         R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
 272 }
 273
 274 void GL_SetMirrorState(qboolean state);
 275
 276 void GL_SetupView_Orientation_Identity (void)
 277 {
 278         backend_viewmatrix = identitymatrix;
 279         GL_SetMirrorState(false);
 280         memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
 281 }
 282
 283 void GL_SetupView_Orientation_FromEntity(const matrix4x4_t *matrix)
 284 {
 285         matrix4x4_t tempmatrix, basematrix;
 286         Matrix4x4_Invert_Full(&tempmatrix, matrix);
 287         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 288         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 289         Matrix4x4_Concat(&backend_viewmatrix, &basematrix, &tempmatrix);
 290
 291         GL_SetMirrorState(v_flipped.integer);
 292         if(v_flipped_state)
 293         {
 294                 Matrix4x4_Transpose(&basematrix, &backend_viewmatrix);
 295                 Matrix4x4_ConcatScale3(&basematrix, -1, 1, 1);
 296                 Matrix4x4_Transpose(&backend_viewmatrix, &basematrix);
 297         }
 298
 299         //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[2], 1, 0, 0);
 300         //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[0], 0, 1, 0);
 301         //Matrix4x4_ConcatRotate(&backend_viewmatrix, -angles[1], 0, 0, 1);
 302         //Matrix4x4_ConcatTranslate(&backend_viewmatrix, -origin[0], -origin[1], -origin[2]);
 303
 304         // force an update of the model matrix by copying it off, resetting it, and then calling the R_Mesh_Matrix function with it
 305         tempmatrix = backend_modelmatrix;
 306         memset(&backend_modelmatrix, 0, sizeof(backend_modelmatrix));
 307         R_Mesh_Matrix(&tempmatrix);
 308 }
 309
 310 static void GL_BuildFrustum(double m[16], double left, double right, double bottom, double top, double nearVal, double farVal)
 311 {
 312         m[0]  = 2 * nearVal / (right - left);
 313         m[1]  = 0;
 314         m[2]  = 0;
 315         m[3]  = 0;
 316
 317         m[4]  = 0;
 318         m[5]  = 2 * nearVal / (top - bottom);
 319         m[6]  = 0;
 320         m[7]  = 0;
 321
 322         m[8]  = (right + left) / (right - left);
 323         m[9]  = (top + bottom) / (top - bottom);
 324         m[10] = - (farVal + nearVal) / (farVal - nearVal);
 325         m[11] = -1;
 326
 327         m[12] = 0;
 328         m[13] = 0;
 329         m[14] = - 2 * farVal * nearVal / (farVal - nearVal);
 330         m[15] = 0;
 331 }
 332
 333 void GL_SetupView_Mode_Perspective (double frustumx, double frustumy, double zNear, double zFar)
 334 {
 335         double m[16];
 336
 337         // set up viewpoint
 338         CHECKGLERROR
 339         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 340         // set view pyramid
 341 #if 1
 342         // avoid glGetDoublev whenever possible, it may stall the render pipeline
 343         // in the tested cases (nvidia) no measurable fps difference, but it sure
 344         // makes a difference over a network line with GLX
 345         GL_BuildFrustum(m, -frustumx * zNear, frustumx * zNear, -frustumy * zNear, frustumy * zNear, zNear, zFar);
 346         qglLoadMatrixd(m);CHECKGLERROR
 347 #else
 348         qglLoadIdentity();CHECKGLERROR
 349         qglFrustum(-frustumx * zNear, frustumx * zNear, -frustumy * zNear, frustumy * zNear, zNear, zFar);CHECKGLERROR
 350         qglGetDoublev(GL_PROJECTION_MATRIX, m);CHECKGLERROR
 351 #endif
 352         Matrix4x4_FromArrayDoubleGL(&backend_projectmatrix, m);
 353         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 354         GL_SetupView_Orientation_Identity();
 355         CHECKGLERROR
 356 }
 357
 358 void GL_SetupView_Mode_PerspectiveInfiniteFarClip (double frustumx, double frustumy, double zNear)
 359 {
 360         double nudge, m[16];
 361
 362         // set up viewpoint
 363         CHECKGLERROR
 364         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 365         qglLoadIdentity();CHECKGLERROR
 366         // set view pyramid
 367         nudge = 1.0 - 1.0 / (1<<23);
 368         m[ 0] = 1.0 / frustumx;
 369         m[ 1] = 0;
 370         m[ 2] = 0;
 371         m[ 3] = 0;
 372         m[ 4] = 0;
 373         m[ 5] = 1.0 / frustumy;
 374         m[ 6] = 0;
 375         m[ 7] = 0;
 376         m[ 8] = 0;
 377         m[ 9] = 0;
 378         m[10] = -nudge;
 379         m[11] = -1;
 380         m[12] = 0;
 381         m[13] = 0;
 382         m[14] = -2 * zNear * nudge;
 383         m[15] = 0;
 384         qglLoadMatrixd(m);CHECKGLERROR
 385         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 386         GL_SetupView_Orientation_Identity();
 387         CHECKGLERROR
 388         Matrix4x4_FromArrayDoubleGL(&backend_projectmatrix, m);
 389 }
 390
 391 static void GL_BuildOrtho(double m[16], double left, double right, double bottom, double top, double zNear, double zFar)
 392 {
 393         m[0]  = 2/(right - left);
 394         m[1]  = 0;
 395         m[2]  = 0;
 396         m[3]  = 0;
 397
 398         m[4]  = 0;
 399         m[5]  = 2/(top - bottom);
 400         m[6]  = 0;
 401         m[7]  = 0;
 402
 403         m[8]  = 0;
 404         m[9]  = 0;
 405         m[10] = -2/(zFar - zNear);
 406         m[11] = 0;
 407
 408         m[12] = - (right + left)/(right - left);
 409         m[13] = - (top + bottom)/(top - bottom);
 410         m[14] = - (zFar + zNear)/(zFar - zNear);
 411         m[15] = 1;
 412 }
 413
 414 void GL_SetupView_Mode_Ortho (double x1, double y1, double x2, double y2, double zNear, double zFar)
 415 {
 416         double m[16];
 417
 418         // set up viewpoint
 419         CHECKGLERROR
 420         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 421 #if 1
 422         // avoid glGetDoublev whenever possible, it may stall the render pipeline
 423         // in the tested cases (nvidia) no measurable fps difference, but it sure
 424         // makes a difference over a network line with GLX
 425         GL_BuildOrtho(m, x1, x2, y2, y1, zNear, zFar);
 426         qglLoadMatrixd(m);CHECKGLERROR
 427 #else
 428         qglLoadIdentity();CHECKGLERROR
 429         qglOrtho(x1, x2, y2, y1, zNear, zFar);CHECKGLERROR
 430         qglGetDoublev(GL_PROJECTION_MATRIX, m);CHECKGLERROR
 431 #endif
 432         Matrix4x4_FromArrayDoubleGL(&backend_projectmatrix, m);
 433         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 434         GL_SetupView_Orientation_Identity();
 435         CHECKGLERROR
 436 }
 437
 438 void GL_SetupView_ApplyCustomNearClipPlane(double normalx, double normaly, double normalz, double dist)
 439 {
 440         double matrix[16];
 441         double q[4];
 442         double d;
 443         float clipPlane[4], v3[3], v4[3];
 444         float normal[3];
 445
 446         // This is Olique Depth Projection from http://www.terathon.com/code/oblique.php
 447         // modified to fit in this codebase.
 448
 449         VectorSet(normal, normalx, normaly, normalz);
 450         Matrix4x4_Transform3x3(&backend_viewmatrix, normal, clipPlane);
 451         VectorScale(normal, dist, v3);
 452         Matrix4x4_Transform(&backend_viewmatrix, v3, v4);
 453         // FIXME: LordHavoc: I think this can be done more efficiently somehow but I can't remember the technique
 454         clipPlane[3] = -DotProduct(v4, clipPlane);
 455
 456 #if 0
 457 {
 458         // testing code for comparing results
 459         float clipPlane2[4];
 460         VectorCopy4(clipPlane, clipPlane2);
 461         R_Mesh_Matrix(&identitymatrix);
 462         VectorSet(q, normal[0], normal[1], normal[2], -dist);
 463         qglClipPlane(GL_CLIP_PLANE0, q);
 464         qglGetClipPlane(GL_CLIP_PLANE0, q);
 465         VectorCopy4(q, clipPlane);
 466 }
 467 #endif
 468
 469         // Calculate the clip-space corner point opposite the clipping plane
 470         // as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and
 471         // transform it into camera space by multiplying it
 472         // by the inverse of the projection matrix
 473         Matrix4x4_ToArrayDoubleGL(&backend_projectmatrix, matrix);
 474
 475         q[0] = ((clipPlane[0] < 0.0f ? -1.0f : clipPlane[0] > 0.0f ? 1.0f : 0.0f) + matrix[8]) / matrix[0];
 476         q[1] = ((clipPlane[1] < 0.0f ? -1.0f : clipPlane[1] > 0.0f ? 1.0f : 0.0f) + matrix[9]) / matrix[5];
 477         q[2] = -1.0f;
 478         q[3] = (1.0f + matrix[10]) / matrix[14];
 479
 480         // Calculate the scaled plane vector
 481         d = 2.0f / DotProduct4(clipPlane, q);
 482
 483         // Replace the third row of the projection matrix
 484         matrix[2] = clipPlane[0] * d;
 485         matrix[6] = clipPlane[1] * d;
 486         matrix[10] = clipPlane[2] * d + 1.0f;
 487         matrix[14] = clipPlane[3] * d;
 488
 489         // Load it back into OpenGL
 490         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 491         qglLoadMatrixd(matrix);CHECKGLERROR
 492         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 493         CHECKGLERROR
 494         Matrix4x4_FromArrayDoubleGL(&backend_projectmatrix, matrix);
 495 }
 496
 497 typedef struct gltextureunit_s
 498 {
 499         const void *pointer_texcoord;
 500         size_t pointer_texcoord_offset;
 501         int pointer_texcoord_buffer;
 502         int t1d, t2d, t3d, tcubemap;
 503         int arrayenabled;
 504         unsigned int arraycomponents;
 505         int rgbscale, alphascale;
 506         int combinergb, combinealpha;
 507         // FIXME: add more combine stuff
 508         // texmatrixenabled exists only to avoid unnecessary texmatrix compares
 509         int texmatrixenabled;
 510         matrix4x4_t matrix;
 511 }
 512 gltextureunit_t;
 513
 514 static struct gl_state_s
 515 {
 516         int cullface;
 517         int cullfaceenable;
 518         int blendfunc1;
 519         int blendfunc2;
 520         int blend;
 521         GLboolean depthmask;
 522         int colormask; // stored as bottom 4 bits: r g b a (3 2 1 0 order)
 523         int depthtest;
 524         float depthrange[2];
 525         float polygonoffset[2];
 526         int alphatest;
 527         int scissortest;
 528         unsigned int unit;
 529         gltextureunit_t units[MAX_TEXTUREUNITS];
 530         float color4f[4];
 531         int lockrange_first;
 532         int lockrange_count;
 533         int vertexbufferobject;
 534         int elementbufferobject;
 535         qboolean pointer_color_enabled;
 536         const void *pointer_vertex;
 537         const void *pointer_color;
 538         size_t pointer_vertex_offset;
 539         size_t pointer_color_offset;
 540         int pointer_vertex_buffer;
 541         int pointer_color_buffer;
 542 }
 543 gl_state;
 544
 545 static void GL_BindVBO(int bufferobject)
 546 {
 547         if (gl_state.vertexbufferobject != bufferobject)
 548         {
 549                 gl_state.vertexbufferobject = bufferobject;
 550                 CHECKGLERROR
 551                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, bufferobject);
 552                 CHECKGLERROR
 553         }
 554 }
 555
 556 static void GL_BindEBO(int bufferobject)
 557 {
 558         if (gl_state.elementbufferobject != bufferobject)
 559         {
 560                 gl_state.elementbufferobject = bufferobject;
 561                 CHECKGLERROR
 562                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobject);
 563                 CHECKGLERROR
 564         }
 565 }
 566
 567 void GL_SetupTextureState(void)
 568 {
 569         unsigned int i;
 570         gltextureunit_t *unit;
 571         CHECKGLERROR
 572         gl_state.unit = MAX_TEXTUREUNITS;
 573         for (i = 0;i < MAX_TEXTUREUNITS;i++)
 574         {
 575                 unit = gl_state.units + i;
 576                 unit->t1d = 0;
 577                 unit->t2d = 0;
 578                 unit->t3d = 0;
 579                 unit->tcubemap = 0;
 580                 unit->arrayenabled = false;
 581                 unit->arraycomponents = 0;
 582                 unit->pointer_texcoord = NULL;
 583                 unit->pointer_texcoord_buffer = 0;
 584                 unit->pointer_texcoord_offset = 0;
 585                 unit->rgbscale = 1;
 586                 unit->alphascale = 1;
 587                 unit->combinergb = GL_MODULATE;
 588                 unit->combinealpha = GL_MODULATE;
 589                 unit->texmatrixenabled = false;
 590                 unit->matrix = identitymatrix;
 591         }
 592
 593         for (i = 0;i < backendimageunits;i++)
 594         {
 595                 GL_ActiveTexture(i);
 596                 qglBindTexture(GL_TEXTURE_1D, 0);CHECKGLERROR
 597                 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
 598                 if (gl_texture3d)
 599                 {
 600                         qglBindTexture(GL_TEXTURE_3D, 0);CHECKGLERROR
 601                 }
 602                 if (gl_texturecubemap)
 603                 {
 604                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);CHECKGLERROR
 605                 }
 606         }
 607
 608         for (i = 0;i < backendarrayunits;i++)
 609         {
 610                 GL_ActiveTexture(i);
 611                 GL_BindVBO(0);
 612                 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
 613                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
 614         }
 615
 616         for (i = 0;i < backendunits;i++)
 617         {
 618                 GL_ActiveTexture(i);
 619                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
 620                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
 621                 if (gl_texture3d)
 622                 {
 623                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
 624                 }
 625                 if (gl_texturecubemap)
 626                 {
 627                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
 628                 }
 629                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
 630                 qglLoadIdentity();CHECKGLERROR
 631                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 632                 if (gl_combine.integer)
 633                 {
 634                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
 635                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
 636                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
 637                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
 638                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
 639                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
 640                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
 641                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
 642                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
 643                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
 644                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
 645                         qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
 646                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
 647                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
 648                         qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
 649                         qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
 650                         qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
 651                 }
 652                 else
 653                 {
 654                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
 655                 }
 656                 CHECKGLERROR
 657         }
 658         CHECKGLERROR
 659 }
 660
 661 void GL_Backend_ResetState(void)
 662 {
 663         memset(&gl_state, 0, sizeof(gl_state));
 664         gl_state.depthtest = true;
 665         gl_state.alphatest = false;
 666         gl_state.blendfunc1 = GL_ONE;
 667         gl_state.blendfunc2 = GL_ZERO;
 668         gl_state.blend = false;
 669         gl_state.depthmask = GL_TRUE;
 670         gl_state.colormask = 15;
 671         gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
 672         gl_state.lockrange_first = 0;
 673         gl_state.lockrange_count = 0;
 674         gl_state.cullface = v_flipped_state ? GL_BACK : GL_FRONT; // quake is backwards, this culls back faces
 675         gl_state.cullfaceenable = true;
 676         gl_state.polygonoffset[0] = 0;
 677         gl_state.polygonoffset[1] = 0;
 678
 679         CHECKGLERROR
 680
 681         qglColorMask(1, 1, 1, 1);
 682         qglAlphaFunc(GL_GEQUAL, 0.5);CHECKGLERROR
 683         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 684         qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
 685         qglDisable(GL_BLEND);CHECKGLERROR
 686         qglCullFace(gl_state.cullface);CHECKGLERROR
 687         qglEnable(GL_CULL_FACE);CHECKGLERROR
 688         qglDepthFunc(GL_LEQUAL);CHECKGLERROR
 689         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 690         qglDepthMask(gl_state.depthmask);CHECKGLERROR
 691         qglPolygonOffset(gl_state.polygonoffset[0], gl_state.polygonoffset[1]);
 692
 693         if (gl_support_arb_vertex_buffer_object)
 694         {
 695                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 696                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
 697         }
 698
 699         qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
 700         qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
 701
 702         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
 703         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
 704
 705         GL_Color(0, 0, 0, 0);
 706         GL_Color(1, 1, 1, 1);
 707
 708         GL_SetupTextureState();
 709 }
 710
 711 void GL_ActiveTexture(unsigned int num)
 712 {
 713         if (gl_state.unit != num)
 714         {
 715                 gl_state.unit = num;
 716                 if (qglActiveTexture)
 717                 {
 718                         CHECKGLERROR
 719                         qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
 720                         qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
 721                         CHECKGLERROR
 722                 }
 723         }
 724 }
 725
 726 void GL_BlendFunc(int blendfunc1, int blendfunc2)
 727 {
 728         if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
 729         {
 730                 CHECKGLERROR
 731                 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
 732                 if (gl_state.blendfunc2 == GL_ZERO)
 733                 {
 734                         if (gl_state.blendfunc1 == GL_ONE)
 735                         {
 736                                 if (gl_state.blend)
 737                                 {
 738                                         gl_state.blend = 0;
 739                                         qglDisable(GL_BLEND);CHECKGLERROR
 740                                 }
 741                         }
 742                         else
 743                         {
 744                                 if (!gl_state.blend)
 745                                 {
 746                                         gl_state.blend = 1;
 747                                         qglEnable(GL_BLEND);CHECKGLERROR
 748                                 }
 749                         }
 750                 }
 751                 else
 752                 {
 753                         if (!gl_state.blend)
 754                         {
 755                                 gl_state.blend = 1;
 756                                 qglEnable(GL_BLEND);CHECKGLERROR
 757                         }
 758                 }
 759         }
 760 }
 761
 762 void GL_DepthMask(int state)
 763 {
 764         if (gl_state.depthmask != state)
 765         {
 766                 CHECKGLERROR
 767                 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
 768         }
 769 }
 770
 771 void GL_DepthTest(int state)
 772 {
 773         if (gl_state.depthtest != state)
 774         {
 775                 gl_state.depthtest = state;
 776                 CHECKGLERROR
 777                 if (gl_state.depthtest)
 778                 {
 779                         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 780                 }
 781                 else
 782                 {
 783                         qglDisable(GL_DEPTH_TEST);CHECKGLERROR
 784                 }
 785         }
 786 }
 787
 788 void GL_DepthRange(float nearfrac, float farfrac)
 789 {
 790         if (gl_state.depthrange[0] != nearfrac || gl_state.depthrange[1] != farfrac)
 791         {
 792                 gl_state.depthrange[0] = nearfrac;
 793                 gl_state.depthrange[1] = farfrac;
 794                 qglDepthRange(nearfrac, farfrac);
 795         }
 796 }
 797
 798 void GL_PolygonOffset(float planeoffset, float depthoffset)
 799 {
 800         if (gl_state.polygonoffset[0] != planeoffset || gl_state.polygonoffset[1] != depthoffset)
 801         {
 802                 gl_state.polygonoffset[0] = planeoffset;
 803                 gl_state.polygonoffset[1] = depthoffset;
 804                 qglPolygonOffset(planeoffset, depthoffset);
 805         }
 806 }
 807
 808 void GL_SetMirrorState(qboolean state)
 809 {
 810         if(!state != !v_flipped_state)
 811         {
 812                 // change cull face mode!
 813                 if(gl_state.cullface == GL_BACK)
 814                         qglCullFace((gl_state.cullface = GL_FRONT));
 815                 else if(gl_state.cullface == GL_FRONT)
 816                         qglCullFace((gl_state.cullface = GL_BACK));
 817         }
 818         v_flipped_state = state;
 819 }
 820
 821 void GL_CullFace(int state)
 822 {
 823         CHECKGLERROR
 824
 825         if(v_flipped_state)
 826         {
 827                 if(state == GL_FRONT)
 828                         state = GL_BACK;
 829                 else if(state == GL_BACK)
 830                         state = GL_FRONT;
 831         }
 832
 833         if (state != GL_NONE)
 834         {
 835                 if (!gl_state.cullfaceenable)
 836                 {
 837                         gl_state.cullfaceenable = true;
 838                         qglEnable(GL_CULL_FACE);CHECKGLERROR
 839                 }
 840                 if (gl_state.cullface != state)
 841                 {
 842                         gl_state.cullface = state;
 843                         qglCullFace(gl_state.cullface);CHECKGLERROR
 844                 }
 845         }
 846         else
 847         {
 848                 if (gl_state.cullfaceenable)
 849                 {
 850                         gl_state.cullfaceenable = false;
 851                         qglDisable(GL_CULL_FACE);CHECKGLERROR
 852                 }
 853         }
 854 }
 855
 856 void GL_AlphaTest(int state)
 857 {
 858         if (gl_state.alphatest != state)
 859         {
 860                 gl_state.alphatest = state;
 861                 CHECKGLERROR
 862                 if (gl_state.alphatest)
 863                 {
 864                         qglEnable(GL_ALPHA_TEST);CHECKGLERROR
 865                 }
 866                 else
 867                 {
 868                         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 869                 }
 870         }
 871 }
 872
 873 void GL_ColorMask(int r, int g, int b, int a)
 874 {
 875         int state = r*8 + g*4 + b*2 + a*1;
 876         if (gl_state.colormask != state)
 877         {
 878                 gl_state.colormask = state;
 879                 CHECKGLERROR
 880                 qglColorMask((GLboolean)r, (GLboolean)g, (GLboolean)b, (GLboolean)a);CHECKGLERROR
 881         }
 882 }
 883
 884 void GL_Color(float cr, float cg, float cb, float ca)
 885 {
 886         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)
 887         {
 888                 gl_state.color4f[0] = cr;
 889                 gl_state.color4f[1] = cg;
 890                 gl_state.color4f[2] = cb;
 891                 gl_state.color4f[3] = ca;
 892                 CHECKGLERROR
 893                 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
 894                 CHECKGLERROR
 895         }
 896 }
 897
 898 void GL_LockArrays(int first, int count)
 899 {
 900         if (count < gl_lockarrays_minimumvertices.integer)
 901         {
 902                 first = 0;
 903                 count = 0;
 904         }
 905         if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
 906         {
 907                 if (gl_state.lockrange_count)
 908                 {
 909                         gl_state.lockrange_count = 0;
 910                         CHECKGLERROR
 911                         qglUnlockArraysEXT();
 912                         CHECKGLERROR
 913                 }
 914                 if (count && gl_supportslockarrays && gl_lockarrays.integer && r_render.integer)
 915                 {
 916                         gl_state.lockrange_first = first;
 917                         gl_state.lockrange_count = count;
 918                         CHECKGLERROR
 919                         qglLockArraysEXT(first, count);
 920                         CHECKGLERROR
 921                 }
 922         }
 923 }
 924
 925 void GL_Scissor (int x, int y, int width, int height)
 926 {
 927         CHECKGLERROR
 928         qglScissor(x, vid.height - (y + height),width,height);
 929         CHECKGLERROR
 930 }
 931
 932 void GL_ScissorTest(int state)
 933 {
 934         if(gl_state.scissortest == state)
 935                 return;
 936
 937         CHECKGLERROR
 938         if((gl_state.scissortest = state))
 939                 qglEnable(GL_SCISSOR_TEST);
 940         else
 941                 qglDisable(GL_SCISSOR_TEST);
 942         CHECKGLERROR
 943 }
 944
 945 void GL_Clear(int mask)
 946 {
 947         CHECKGLERROR
 948         qglClear(mask);CHECKGLERROR
 949 }
 950
 951 void GL_TransformToScreen(const vec4_t in, vec4_t out)
 952 {
 953         vec4_t temp;
 954         float iw;
 955         Matrix4x4_Transform4 (&backend_viewmatrix, in, temp);
 956         Matrix4x4_Transform4 (&backend_projectmatrix, temp, out);
 957         iw = 1.0f / out[3];
 958         out[0] = r_refdef.view.x + (out[0] * iw + 1.0f) * r_refdef.view.width * 0.5f;
 959         out[1] = r_refdef.view.y + r_refdef.view.height - (out[1] * iw + 1.0f) * r_refdef.view.height * 0.5f;
 960         out[2] = r_refdef.view.z + (out[2] * iw + 1.0f) * r_refdef.view.depth * 0.5f;
 961 }
 962
 963 // called at beginning of frame
 964 void R_Mesh_Start(void)
 965 {
 966         BACKENDACTIVECHECK
 967         CHECKGLERROR
 968         if (gl_printcheckerror.integer && !gl_paranoid.integer)
 969         {
 970                 Con_Printf("WARNING: gl_printcheckerror is on but gl_paranoid is off, turning it on...\n");
 971                 Cvar_SetValueQuick(&gl_paranoid, 1);
 972         }
 973         GL_Backend_ResetState();
 974 }
 975
 976 qboolean GL_Backend_CompileShader(int programobject, GLenum shadertypeenum, const char *shadertype, int numstrings, const char **strings)
 977 {
 978         int shaderobject;
 979         int shadercompiled;
 980         char compilelog[MAX_INPUTLINE];
 981         shaderobject = qglCreateShaderObjectARB(shadertypeenum);CHECKGLERROR
 982         if (!shaderobject)
 983                 return false;
 984         qglShaderSourceARB(shaderobject, numstrings, strings, NULL);CHECKGLERROR
 985         qglCompileShaderARB(shaderobject);CHECKGLERROR
 986         qglGetObjectParameterivARB(shaderobject, GL_OBJECT_COMPILE_STATUS_ARB, &shadercompiled);CHECKGLERROR
 987         qglGetInfoLogARB(shaderobject, sizeof(compilelog), NULL, compilelog);CHECKGLERROR
 988         if (compilelog[0] && developer.integer > 0)
 989         {
 990                 int i, j, pretextlines = 0;
 991                 for (i = 0;i < numstrings - 1;i++)
 992                         for (j = 0;strings[i][j];j++)
 993                                 if (strings[i][j] == '\n')
 994                                         pretextlines++;
 995                 Con_DPrintf("%s shader compile log:\n%s\n(line offset for any above warnings/errors: %i)\n", shadertype, compilelog, pretextlines);
 996         }
 997         if (!shadercompiled)
 998         {
 999                 qglDeleteObjectARB(shaderobject);CHECKGLERROR
1000                 return false;
1001         }
1002         qglAttachObjectARB(programobject, shaderobject);CHECKGLERROR
1003         qglDeleteObjectARB(shaderobject);CHECKGLERROR
1004         return true;
1005 }
1006
1007 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)
1008 {
1009         GLint programlinked;
1010         GLuint programobject = 0;
1011         char linklog[MAX_INPUTLINE];
1012         CHECKGLERROR
1013
1014         programobject = qglCreateProgramObjectARB();CHECKGLERROR
1015         if (!programobject)
1016                 return 0;
1017
1018         if (vertexstrings_count && !GL_Backend_CompileShader(programobject, GL_VERTEX_SHADER_ARB, "vertex", vertexstrings_count, vertexstrings_list))
1019                 goto cleanup;
1020
1021 #ifdef GL_GEOMETRY_SHADER_ARB
1022         if (geometrystrings_count && !GL_Backend_CompileShader(programobject, GL_GEOMETRY_SHADER_ARB, "geometry", geometrystrings_count, geometrystrings_list))
1023                 goto cleanup;
1024 #endif
1025
1026         if (fragmentstrings_count && !GL_Backend_CompileShader(programobject, GL_FRAGMENT_SHADER_ARB, "fragment", fragmentstrings_count, fragmentstrings_list))
1027                 goto cleanup;
1028
1029         qglLinkProgramARB(programobject);CHECKGLERROR
1030         qglGetObjectParameterivARB(programobject, GL_OBJECT_LINK_STATUS_ARB, &programlinked);CHECKGLERROR
1031         qglGetInfoLogARB(programobject, sizeof(linklog), NULL, linklog);CHECKGLERROR
1032         if (linklog[0])
1033         {
1034                 Con_DPrintf("program link log:\n%s\n", linklog);
1035                 // software vertex shader is ok but software fragment shader is WAY
1036                 // too slow, fail program if so.
1037                 // NOTE: this string might be ATI specific, but that's ok because the
1038                 // ATI R300 chip (Radeon 9500-9800/X300) is the most likely to use a
1039                 // software fragment shader due to low instruction and dependent
1040                 // texture limits.
1041                 if (strstr(linklog, "fragment shader will run in software"))
1042                         programlinked = false;
1043         }
1044         if (!programlinked)
1045                 goto cleanup;
1046         return programobject;
1047 cleanup:
1048         qglDeleteObjectARB(programobject);CHECKGLERROR
1049         return 0;
1050 }
1051
1052 void GL_Backend_FreeProgram(unsigned int prog)
1053 {
1054         CHECKGLERROR
1055         qglDeleteObjectARB(prog);
1056         CHECKGLERROR
1057 }
1058
1059 int gl_backend_rebindtextures;
1060
1061 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
1062 {
1063         int i;
1064         if (offset)
1065         {
1066                 for (i = 0;i < count;i++)
1067                         *out++ = *in++ + offset;
1068         }
1069         else
1070                 memcpy(out, in, sizeof(*out) * count);
1071 }
1072
1073 // renders triangles using vertices from the active arrays
1074 int paranoidblah = 0;
1075 void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtriangles, const int *element3i, const unsigned short *element3s, int bufferobject3i, int bufferobject3s)
1076 {
1077         unsigned int numelements = numtriangles * 3;
1078         if (numvertices < 3 || numtriangles < 1)
1079         {
1080                 Con_Printf("R_Mesh_Draw(%d, %d, %d, %d, %8p, %8p, %i, %i);\n", firstvertex, numvertices, firsttriangle, numtriangles, element3i, element3s, bufferobject3i, bufferobject3s);
1081                 return;
1082         }
1083         if (!gl_mesh_prefer_short_elements.integer)
1084         {
1085                 if (element3i)
1086                         element3s = NULL;
1087                 if (bufferobject3i)
1088                         bufferobject3s = 0;
1089         }
1090         if (element3i)
1091                 element3i += firsttriangle * 3;
1092         if (element3s)
1093                 element3s += firsttriangle * 3;
1094         switch (gl_vbo.integer)
1095         {
1096         default:
1097         case 0:
1098         case 2:
1099                 bufferobject3i = bufferobject3s = 0;
1100                 break;
1101         case 1:
1102                 break;
1103         case 3:
1104                 if (firsttriangle)
1105                         bufferobject3i = bufferobject3s = 0;
1106                 break;
1107         }
1108         CHECKGLERROR
1109         r_refdef.stats.meshes++;
1110         r_refdef.stats.meshes_elements += numelements;
1111         if (gl_paranoid.integer)
1112         {
1113                 unsigned int i, j, size;
1114                 const int *p;
1115                 // note: there's no validation done here on buffer objects because it
1116                 // is somewhat difficult to get at the data, and gl_paranoid can be
1117                 // used without buffer objects if the need arises
1118                 // (the data could be gotten using glMapBuffer but it would be very
1119                 //  slow due to uncachable video memory reads)
1120                 if (!qglIsEnabled(GL_VERTEX_ARRAY))
1121                         Con_Print("R_Mesh_Draw: vertex array not enabled\n");
1122                 CHECKGLERROR
1123                 if (gl_state.pointer_vertex)
1124                         for (j = 0, size = numvertices * 3, p = (int *)((float *)gl_state.pointer_vertex + firstvertex * 3);j < size;j++, p++)
1125                                 paranoidblah += *p;
1126                 if (gl_state.pointer_color_enabled)
1127                 {
1128                         if (!qglIsEnabled(GL_COLOR_ARRAY))
1129                                 Con_Print("R_Mesh_Draw: color array set but not enabled\n");
1130                         CHECKGLERROR
1131                         if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1132                                 for (j = 0, size = numvertices * 4, p = (int *)((float *)gl_state.pointer_color + firstvertex * 4);j < size;j++, p++)
1133                                         paranoidblah += *p;
1134                 }
1135                 for (i = 0;i < backendarrayunits;i++)
1136                 {
1137                         if (gl_state.units[i].arrayenabled)
1138                         {
1139                                 GL_ActiveTexture(i);
1140                                 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
1141                                         Con_Print("R_Mesh_Draw: texcoord array set but not enabled\n");
1142                                 CHECKGLERROR
1143                                 if (gl_state.units[i].pointer_texcoord && gl_state.units[i].arrayenabled)
1144                                         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++)
1145                                                 paranoidblah += *p;
1146                         }
1147                 }
1148                 if (element3i)
1149                 {
1150                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1151                         {
1152                                 if (element3i[i] < firstvertex || element3i[i] >= firstvertex + numvertices)
1153                                 {
1154                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3i array\n", element3i[i], firstvertex, firstvertex + numvertices);
1155                                         return;
1156                                 }
1157                         }
1158                 }
1159                 if (element3s)
1160                 {
1161                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1162                         {
1163                                 if (element3s[i] < firstvertex || element3s[i] >= firstvertex + numvertices)
1164                                 {
1165                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3s array\n", element3s[i], firstvertex, firstvertex + numvertices);
1166                                         return;
1167                                 }
1168                         }
1169                 }
1170                 CHECKGLERROR
1171         }
1172         if (r_render.integer)
1173         {
1174                 CHECKGLERROR
1175                 if (gl_mesh_testmanualfeeding.integer)
1176                 {
1177                         unsigned int i, j, element;
1178                         const GLfloat *p;
1179                         qglBegin(GL_TRIANGLES);
1180                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1181                         {
1182                                 element = element3i ? element3i[i] : element3s[i];
1183                                 for (j = 0;j < backendarrayunits;j++)
1184                                 {
1185                                         if (gl_state.units[j].pointer_texcoord && gl_state.units[j].arrayenabled)
1186                                         {
1187                                                 if (backendarrayunits > 1)
1188                                                 {
1189                                                         if (gl_state.units[j].arraycomponents == 4)
1190                                                         {
1191                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1192                                                                 qglMultiTexCoord4f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2], p[3]);
1193                                                         }
1194                                                         else if (gl_state.units[j].arraycomponents == 3)
1195                                                         {
1196                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1197                                                                 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
1198                                                         }
1199                                                         else if (gl_state.units[j].arraycomponents == 2)
1200                                                         {
1201                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1202                                                                 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
1203                                                         }
1204                                                         else
1205                                                         {
1206                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1207                                                                 qglMultiTexCoord1f(GL_TEXTURE0_ARB + j, p[0]);
1208                                                         }
1209                                                 }
1210                                                 else
1211                                                 {
1212                                                         if (gl_state.units[j].arraycomponents == 4)
1213                                                         {
1214                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1215                                                                 qglTexCoord4f(p[0], p[1], p[2], p[3]);
1216                                                         }
1217                                                         else if (gl_state.units[j].arraycomponents == 3)
1218                                                         {
1219                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1220                                                                 qglTexCoord3f(p[0], p[1], p[2]);
1221                                                         }
1222                                                         else if (gl_state.units[j].arraycomponents == 2)
1223                                                         {
1224                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1225                                                                 qglTexCoord2f(p[0], p[1]);
1226                                                         }
1227                                                         else
1228                                                         {
1229                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1230                                                                 qglTexCoord1f(p[0]);
1231                                                         }
1232                                                 }
1233                                         }
1234                                 }
1235                                 if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1236                                 {
1237                                         p = ((const GLfloat *)(gl_state.pointer_color)) + element * 4;
1238                                         qglColor4f(p[0], p[1], p[2], p[3]);
1239                                 }
1240                                 p = ((const GLfloat *)(gl_state.pointer_vertex)) + element * 3;
1241                                 qglVertex3f(p[0], p[1], p[2]);
1242                         }
1243                         qglEnd();
1244                         CHECKGLERROR
1245                 }
1246                 else if (gl_mesh_testarrayelement.integer)
1247                 {
1248                         int i;
1249                         qglBegin(GL_TRIANGLES);
1250                         if (element3i)
1251                         {
1252                                 for (i = 0;i < numtriangles * 3;i++)
1253                                         qglArrayElement(element3i[i]);
1254                         }
1255                         else if (element3s)
1256                         {
1257                                 for (i = 0;i < numtriangles * 3;i++)
1258                                         qglArrayElement(element3s[i]);
1259                         }
1260                         qglEnd();
1261                         CHECKGLERROR
1262                 }
1263                 else if (bufferobject3s)
1264                 {
1265                         GL_BindEBO(bufferobject3s);
1266                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1267                         {
1268                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1269                                 CHECKGLERROR
1270                         }
1271                         else
1272                         {
1273                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1274                                 CHECKGLERROR
1275                         }
1276                 }
1277                 else if (bufferobject3i)
1278                 {
1279                         GL_BindEBO(bufferobject3i);
1280                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1281                         {
1282                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1283                                 CHECKGLERROR
1284                         }
1285                         else
1286                         {
1287                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1288                                 CHECKGLERROR
1289                         }
1290                 }
1291                 else if (element3s)
1292                 {
1293                         GL_BindEBO(0);
1294                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1295                         {
1296                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_SHORT, element3s);
1297                                 CHECKGLERROR
1298                         }
1299                         else
1300                         {
1301                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, element3s);
1302                                 CHECKGLERROR
1303                         }
1304                 }
1305                 else if (element3i)
1306                 {
1307                         GL_BindEBO(0);
1308                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1309                         {
1310                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_INT, element3i);
1311                                 CHECKGLERROR
1312                         }
1313                         else
1314                         {
1315                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, element3i);
1316                                 CHECKGLERROR
1317                         }
1318                 }
1319         }
1320 }
1321
1322 // restores backend state, used when done with 3D rendering
1323 void R_Mesh_Finish(void)
1324 {
1325         unsigned int i;
1326         BACKENDACTIVECHECK
1327         CHECKGLERROR
1328         GL_LockArrays(0, 0);
1329         CHECKGLERROR
1330
1331         for (i = 0;i < backendimageunits;i++)
1332         {
1333                 GL_ActiveTexture(i);
1334                 qglBindTexture(GL_TEXTURE_1D, 0);CHECKGLERROR
1335                 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
1336                 if (gl_texture3d)
1337                 {
1338                         qglBindTexture(GL_TEXTURE_3D, 0);CHECKGLERROR
1339                 }
1340                 if (gl_texturecubemap)
1341                 {
1342                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);CHECKGLERROR
1343                 }
1344         }
1345         for (i = 0;i < backendarrayunits;i++)
1346         {
1347                 GL_ActiveTexture(backendarrayunits - 1 - i);
1348                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1349         }
1350         for (i = 0;i < backendunits;i++)
1351         {
1352                 GL_ActiveTexture(backendunits - 1 - i);
1353                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1354                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1355                 if (gl_texture3d)
1356                 {
1357                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1358                 }
1359                 if (gl_texturecubemap)
1360                 {
1361                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1362                 }
1363                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
1364                 if (gl_combine.integer)
1365                 {
1366                         qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
1367                         qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
1368                 }
1369         }
1370         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1371         qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
1372
1373         qglDisable(GL_BLEND);CHECKGLERROR
1374         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
1375         qglDepthMask(GL_TRUE);CHECKGLERROR
1376         qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
1377 }
1378
1379 int R_Mesh_CreateStaticBufferObject(unsigned int target, void *data, size_t size, const char *name)
1380 {
1381         gl_bufferobjectinfo_t *info;
1382         GLuint bufferobject;
1383
1384         if (!gl_vbo.integer)
1385                 return 0;
1386
1387         qglGenBuffersARB(1, &bufferobject);
1388         switch(target)
1389         {
1390         case GL_ELEMENT_ARRAY_BUFFER_ARB: GL_BindEBO(bufferobject);break;
1391         case GL_ARRAY_BUFFER_ARB: GL_BindVBO(bufferobject);break;
1392         default: Sys_Error("R_Mesh_CreateStaticBufferObject: unknown target type %i\n", target);return 0;
1393         }
1394         qglBufferDataARB(target, size, data, GL_STATIC_DRAW_ARB);
1395
1396         info = Mem_ExpandableArray_AllocRecord(&gl_bufferobjectinfoarray);
1397         memset(info, 0, sizeof(*info));
1398         info->target = target;
1399         info->object = bufferobject;
1400         info->size = size;
1401         strlcpy(info->name, name, sizeof(info->name));
1402
1403         return (int)bufferobject;
1404 }
1405
1406 void R_Mesh_DestroyBufferObject(int bufferobject)
1407 {
1408         int i, endindex;
1409         gl_bufferobjectinfo_t *info;
1410
1411         qglDeleteBuffersARB(1, (GLuint *)&bufferobject);
1412
1413         endindex = Mem_ExpandableArray_IndexRange(&gl_bufferobjectinfoarray);
1414         for (i = 0;i < endindex;i++)
1415         {
1416                 info = Mem_ExpandableArray_RecordAtIndex(&gl_bufferobjectinfoarray, i);
1417                 if (!info)
1418                         continue;
1419                 if (info->object == bufferobject)
1420                 {
1421                         Mem_ExpandableArray_FreeRecord(&gl_bufferobjectinfoarray, (void *)info);
1422                         break;
1423                 }
1424         }
1425 }
1426
1427 void GL_Mesh_ListVBOs(qboolean printeach)
1428 {
1429         int i, endindex;
1430         size_t ebocount = 0, ebomemory = 0;
1431         size_t vbocount = 0, vbomemory = 0;
1432         gl_bufferobjectinfo_t *info;
1433         endindex = Mem_ExpandableArray_IndexRange(&gl_bufferobjectinfoarray);
1434         for (i = 0;i < endindex;i++)
1435         {
1436                 info = Mem_ExpandableArray_RecordAtIndex(&gl_bufferobjectinfoarray, i);
1437                 if (!info)
1438                         continue;
1439                 switch(info->target)
1440                 {
1441                 case GL_ELEMENT_ARRAY_BUFFER_ARB: ebocount++;ebomemory += info->size;if (printeach) Con_Printf("EBO #%i %s = %i bytes\n", info->object, info->name, (int)info->size);break;
1442                 case GL_ARRAY_BUFFER_ARB: vbocount++;vbomemory += info->size;if (printeach) Con_Printf("VBO #%i %s = %i bytes\n", info->object, info->name, (int)info->size);break;
1443                 default: Con_Printf("gl_vbostats: unknown target type %i\n", info->target);break;
1444                 }
1445         }
1446         Con_Printf("vertex buffers: %i element buffers totalling %i bytes (%.3f MB), %i vertex buffers totalling %i bytes (%.3f MB), combined %i bytes (%.3fMB)\n", (int)ebocount, (int)ebomemory, ebomemory / 1048576.0, (int)vbocount, (int)vbomemory, vbomemory / 1048576.0, (int)(ebomemory + vbomemory), (ebomemory + vbomemory) / 1048576.0);
1447 }
1448
1449 void R_Mesh_Matrix(const matrix4x4_t *matrix)
1450 {
1451         if (memcmp(matrix, &backend_modelmatrix, sizeof(matrix4x4_t)))
1452         {
1453                 double glmatrix[16];
1454                 backend_modelmatrix = *matrix;
1455                 Matrix4x4_Concat(&backend_modelviewmatrix, &backend_viewmatrix, matrix);
1456                 Matrix4x4_ToArrayDoubleGL(&backend_modelviewmatrix, glmatrix);
1457                 CHECKGLERROR
1458                 qglLoadMatrixd(glmatrix);CHECKGLERROR
1459         }
1460 }
1461
1462 void R_Mesh_VertexPointer(const float *vertex3f, int bufferobject, size_t bufferoffset)
1463 {
1464         if (!gl_vbo.integer)
1465                 bufferobject = 0;
1466         if (gl_state.pointer_vertex != vertex3f || gl_state.pointer_vertex_buffer != bufferobject || gl_state.pointer_vertex_offset != bufferoffset)
1467         {
1468                 gl_state.pointer_vertex = vertex3f;
1469                 gl_state.pointer_vertex_buffer = bufferobject;
1470                 gl_state.pointer_vertex_offset = bufferoffset;
1471                 CHECKGLERROR
1472                 GL_BindVBO(bufferobject);
1473                 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), bufferobject ? (void *)bufferoffset : vertex3f);CHECKGLERROR
1474         }
1475 }
1476
1477 void R_Mesh_ColorPointer(const float *color4f, int bufferobject, size_t bufferoffset)
1478 {
1479         // note: this can not rely on bufferobject to decide whether a color array
1480         // is supplied, because surfmesh_t shares one vbo for all arrays, which
1481         // means that a valid vbo may be supplied even if there is no color array.
1482         if (color4f)
1483         {
1484                 if (!gl_vbo.integer)
1485                         bufferobject = 0;
1486                 // caller wants color array enabled
1487                 if (!gl_state.pointer_color_enabled)
1488                 {
1489                         gl_state.pointer_color_enabled = true;
1490                         CHECKGLERROR
1491                         qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1492                 }
1493                 if (gl_state.pointer_color != color4f || gl_state.pointer_color_buffer != bufferobject || gl_state.pointer_color_offset != bufferoffset)
1494                 {
1495                         gl_state.pointer_color = color4f;
1496                         gl_state.pointer_color_buffer = bufferobject;
1497                         gl_state.pointer_color_offset = bufferoffset;
1498                         CHECKGLERROR
1499                         GL_BindVBO(bufferobject);
1500                         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), bufferobject ? (void *)bufferoffset : color4f);CHECKGLERROR
1501                 }
1502         }
1503         else
1504         {
1505                 // caller wants color array disabled
1506                 if (gl_state.pointer_color_enabled)
1507                 {
1508                         gl_state.pointer_color_enabled = false;
1509                         CHECKGLERROR
1510                         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1511                         // when color array is on the glColor gets trashed, set it again
1512                         qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);CHECKGLERROR
1513                 }
1514         }
1515 }
1516
1517 void R_Mesh_TexCoordPointer(unsigned int unitnum, unsigned int numcomponents, const float *texcoord, int bufferobject, size_t bufferoffset)
1518 {
1519         gltextureunit_t *unit = gl_state.units + unitnum;
1520         // update array settings
1521         CHECKGLERROR
1522         // note: there is no need to check bufferobject here because all cases
1523         // that involve a valid bufferobject also supply a texcoord array
1524         if (texcoord)
1525         {
1526                 if (!gl_vbo.integer)
1527                         bufferobject = 0;
1528                 // texture array unit is enabled, enable the array
1529                 if (!unit->arrayenabled)
1530                 {
1531                         unit->arrayenabled = true;
1532                         GL_ActiveTexture(unitnum);
1533                         qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1534                 }
1535                 // texcoord array
1536                 if (unit->pointer_texcoord != texcoord || unit->pointer_texcoord_buffer != bufferobject || unit->pointer_texcoord_offset != bufferoffset || unit->arraycomponents != numcomponents)
1537                 {
1538                         unit->pointer_texcoord = texcoord;
1539                         unit->pointer_texcoord_buffer = bufferobject;
1540                         unit->pointer_texcoord_offset = bufferoffset;
1541                         unit->arraycomponents = numcomponents;
1542                         GL_ActiveTexture(unitnum);
1543                         GL_BindVBO(bufferobject);
1544                         qglTexCoordPointer(unit->arraycomponents, GL_FLOAT, sizeof(float) * unit->arraycomponents, bufferobject ? (void *)bufferoffset : texcoord);CHECKGLERROR
1545                 }
1546         }
1547         else
1548         {
1549                 // texture array unit is disabled, disable the array
1550                 if (unit->arrayenabled)
1551                 {
1552                         unit->arrayenabled = false;
1553                         GL_ActiveTexture(unitnum);
1554                         qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1555                 }
1556         }
1557 }
1558
1559 void R_Mesh_TexBindAll(unsigned int unitnum, int tex1d, int tex2d, int tex3d, int texcubemap)
1560 {
1561         gltextureunit_t *unit = gl_state.units + unitnum;
1562         if (unitnum >= backendimageunits)
1563                 return;
1564         // update 1d texture binding
1565         if (unit->t1d != tex1d)
1566         {
1567                 GL_ActiveTexture(unitnum);
1568                 if (unitnum < backendunits)
1569                 {
1570                         if (tex1d)
1571                         {
1572                                 if (unit->t1d == 0)
1573                                 {
1574                                         qglEnable(GL_TEXTURE_1D);CHECKGLERROR
1575                                 }
1576                         }
1577                         else
1578                         {
1579                                 if (unit->t1d)
1580                                 {
1581                                         qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1582                                 }
1583                         }
1584                 }
1585                 unit->t1d = tex1d;
1586                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1587         }
1588         // update 2d texture binding
1589         if (unit->t2d != tex2d)
1590         {
1591                 GL_ActiveTexture(unitnum);
1592                 if (unitnum < backendunits)
1593                 {
1594                         if (tex2d)
1595                         {
1596                                 if (unit->t2d == 0)
1597                                 {
1598                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1599                                 }
1600                         }
1601                         else
1602                         {
1603                                 if (unit->t2d)
1604                                 {
1605                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1606                                 }
1607                         }
1608                 }
1609                 unit->t2d = tex2d;
1610                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1611         }
1612         // update 3d texture binding
1613         if (unit->t3d != tex3d)
1614         {
1615                 GL_ActiveTexture(unitnum);
1616                 if (unitnum < backendunits)
1617                 {
1618                         if (tex3d)
1619                         {
1620                                 if (unit->t3d == 0)
1621                                 {
1622                                         qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1623                                 }
1624                         }
1625                         else
1626                         {
1627                                 if (unit->t3d)
1628                                 {
1629                                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1630                                 }
1631                         }
1632                 }
1633                 unit->t3d = tex3d;
1634                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1635         }
1636         // update cubemap texture binding
1637         if (unit->tcubemap != texcubemap)
1638         {
1639                 GL_ActiveTexture(unitnum);
1640                 if (unitnum < backendunits)
1641                 {
1642                         if (texcubemap)
1643                         {
1644                                 if (unit->tcubemap == 0)
1645                                 {
1646                                         qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1647                                 }
1648                         }
1649                         else
1650                         {
1651                                 if (unit->tcubemap)
1652                                 {
1653                                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1654                                 }
1655                         }
1656                 }
1657                 unit->tcubemap = texcubemap;
1658                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1659         }
1660 }
1661
1662 void R_Mesh_TexBind1D(unsigned int unitnum, int texnum)
1663 {
1664         gltextureunit_t *unit = gl_state.units + unitnum;
1665         if (unitnum >= backendimageunits)
1666                 return;
1667         // update 1d texture binding
1668         if (unit->t1d != texnum)
1669         {
1670                 GL_ActiveTexture(unitnum);
1671                 if (unitnum < backendunits)
1672                 {
1673                         if (texnum)
1674                         {
1675                                 if (unit->t1d == 0)
1676                                 {
1677                                         qglEnable(GL_TEXTURE_1D);CHECKGLERROR
1678                                 }
1679                         }
1680                         else
1681                         {
1682                                 if (unit->t1d)
1683                                 {
1684                                         qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1685                                 }
1686                         }
1687                 }
1688                 unit->t1d = texnum;
1689                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1690         }
1691         // update 2d texture binding
1692         if (unit->t2d)
1693         {
1694                 GL_ActiveTexture(unitnum);
1695                 if (unitnum < backendunits)
1696                 {
1697                         if (unit->t2d)
1698                         {
1699                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1700                         }
1701                 }
1702                 unit->t2d = 0;
1703                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1704         }
1705         // update 3d texture binding
1706         if (unit->t3d)
1707         {
1708                 GL_ActiveTexture(unitnum);
1709                 if (unitnum < backendunits)
1710                 {
1711                         if (unit->t3d)
1712                         {
1713                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1714                         }
1715                 }
1716                 unit->t3d = 0;
1717                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1718         }
1719         // update cubemap texture binding
1720         if (unit->tcubemap)
1721         {
1722                 GL_ActiveTexture(unitnum);
1723                 if (unitnum < backendunits)
1724                 {
1725                         if (unit->tcubemap)
1726                         {
1727                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1728                         }
1729                 }
1730                 unit->tcubemap = 0;
1731                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1732         }
1733 }
1734
1735 void R_Mesh_TexBind(unsigned int unitnum, int texnum)
1736 {
1737         gltextureunit_t *unit = gl_state.units + unitnum;
1738         if (unitnum >= backendimageunits)
1739                 return;
1740         // update 1d texture binding
1741         if (unit->t1d)
1742         {
1743                 GL_ActiveTexture(unitnum);
1744                 if (unitnum < backendunits)
1745                 {
1746                         if (unit->t1d)
1747                         {
1748                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1749                         }
1750                 }
1751                 unit->t1d = 0;
1752                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1753         }
1754         // update 2d texture binding
1755         if (unit->t2d != texnum)
1756         {
1757                 GL_ActiveTexture(unitnum);
1758                 if (unitnum < backendunits)
1759                 {
1760                         if (texnum)
1761                         {
1762                                 if (unit->t2d == 0)
1763                                 {
1764                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1765                                 }
1766                         }
1767                         else
1768                         {
1769                                 if (unit->t2d)
1770                                 {
1771                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1772                                 }
1773                         }
1774                 }
1775                 unit->t2d = texnum;
1776                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1777         }
1778         // update 3d texture binding
1779         if (unit->t3d)
1780         {
1781                 GL_ActiveTexture(unitnum);
1782                 if (unitnum < backendunits)
1783                 {
1784                         if (unit->t3d)
1785                         {
1786                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1787                         }
1788                 }
1789                 unit->t3d = 0;
1790                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1791         }
1792         // update cubemap texture binding
1793         if (unit->tcubemap != 0)
1794         {
1795                 GL_ActiveTexture(unitnum);
1796                 if (unitnum < backendunits)
1797                 {
1798                         if (unit->tcubemap)
1799                         {
1800                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1801                         }
1802                 }
1803                 unit->tcubemap = 0;
1804                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1805         }
1806 }
1807
1808 void R_Mesh_TexBind3D(unsigned int unitnum, int texnum)
1809 {
1810         gltextureunit_t *unit = gl_state.units + unitnum;
1811         if (unitnum >= backendimageunits)
1812                 return;
1813         // update 1d texture binding
1814         if (unit->t1d)
1815         {
1816                 GL_ActiveTexture(unitnum);
1817                 if (unitnum < backendunits)
1818                 {
1819                         if (unit->t1d)
1820                         {
1821                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1822                         }
1823                 }
1824                 unit->t1d = 0;
1825                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1826         }
1827         // update 2d texture binding
1828         if (unit->t2d)
1829         {
1830                 GL_ActiveTexture(unitnum);
1831                 if (unitnum < backendunits)
1832                 {
1833                         if (unit->t2d)
1834                         {
1835                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1836                         }
1837                 }
1838                 unit->t2d = 0;
1839                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1840         }
1841         // update 3d texture binding
1842         if (unit->t3d != texnum)
1843         {
1844                 GL_ActiveTexture(unitnum);
1845                 if (unitnum < backendunits)
1846                 {
1847                         if (texnum)
1848                         {
1849                                 if (unit->t3d == 0)
1850                                 {
1851                                         qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1852                                 }
1853                         }
1854                         else
1855                         {
1856                                 if (unit->t3d)
1857                                 {
1858                                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1859                                 }
1860                         }
1861                 }
1862                 unit->t3d = texnum;
1863                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1864         }
1865         // update cubemap texture binding
1866         if (unit->tcubemap != 0)
1867         {
1868                 GL_ActiveTexture(unitnum);
1869                 if (unitnum < backendunits)
1870                 {
1871                         if (unit->tcubemap)
1872                         {
1873                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1874                         }
1875                 }
1876                 unit->tcubemap = 0;
1877                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1878         }
1879 }
1880
1881 void R_Mesh_TexBindCubeMap(unsigned int unitnum, int texnum)
1882 {
1883         gltextureunit_t *unit = gl_state.units + unitnum;
1884         if (unitnum >= backendimageunits)
1885                 return;
1886         // update 1d texture binding
1887         if (unit->t1d)
1888         {
1889                 GL_ActiveTexture(unitnum);
1890                 if (unitnum < backendunits)
1891                 {
1892                         if (unit->t1d)
1893                         {
1894                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
1895                         }
1896                 }
1897                 unit->t1d = 0;
1898                 qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
1899         }
1900         // update 2d texture binding
1901         if (unit->t2d)
1902         {
1903                 GL_ActiveTexture(unitnum);
1904                 if (unitnum < backendunits)
1905                 {
1906                         if (unit->t2d)
1907                         {
1908                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1909                         }
1910                 }
1911                 unit->t2d = 0;
1912                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1913         }
1914         // update 3d texture binding
1915         if (unit->t3d)
1916         {
1917                 GL_ActiveTexture(unitnum);
1918                 if (unitnum < backendunits)
1919                 {
1920                         if (unit->t3d)
1921                         {
1922                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1923                         }
1924                 }
1925                 unit->t3d = 0;
1926                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1927         }
1928         // update cubemap texture binding
1929         if (unit->tcubemap != texnum)
1930         {
1931                 GL_ActiveTexture(unitnum);
1932                 if (unitnum < backendunits)
1933                 {
1934                         if (texnum)
1935                         {
1936                                 if (unit->tcubemap == 0)
1937                                 {
1938                                         qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1939                                 }
1940                         }
1941                         else
1942                         {
1943                                 if (unit->tcubemap)
1944                                 {
1945                                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1946                                 }
1947                         }
1948                 }
1949                 unit->tcubemap = texnum;
1950                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1951         }
1952 }
1953
1954 static const double gl_identitymatrix[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1};
1955
1956 void R_Mesh_TexMatrix(unsigned int unitnum, const matrix4x4_t *matrix)
1957 {
1958         gltextureunit_t *unit = gl_state.units + unitnum;
1959         if (matrix->m[3][3])
1960         {
1961                 // texmatrix specified, check if it is different
1962                 if (!unit->texmatrixenabled || memcmp(&unit->matrix, matrix, sizeof(matrix4x4_t)))
1963                 {
1964                         double glmatrix[16];
1965                         unit->texmatrixenabled = true;
1966                         unit->matrix = *matrix;
1967                         CHECKGLERROR
1968                         Matrix4x4_ToArrayDoubleGL(&unit->matrix, glmatrix);
1969                         GL_ActiveTexture(unitnum);
1970                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1971                         if (gl_workaround_mac_texmatrix.integer & 4)
1972                         {
1973                                 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
1974                                 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
1975                         }
1976                         qglLoadMatrixd(glmatrix);CHECKGLERROR
1977                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1978                 }
1979         }
1980         else
1981         {
1982                 // no texmatrix specified, revert to identity
1983                 if (unit->texmatrixenabled)
1984                 {
1985                         unit->texmatrixenabled = false;
1986                         unit->matrix = identitymatrix;
1987                         CHECKGLERROR
1988                         GL_ActiveTexture(unitnum);
1989                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1990                         qglLoadIdentity();CHECKGLERROR
1991                         if (gl_workaround_mac_texmatrix.integer)
1992                         {
1993                                 qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
1994                                 qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
1995                                 qglLoadMatrixd(gl_identitymatrix);CHECKGLERROR
1996                                 if (gl_workaround_mac_texmatrix.integer & 1)
1997                                         qglLoadIdentity();CHECKGLERROR
1998                         }
1999                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
2000                 }
2001         }
2002 }
2003
2004 void R_Mesh_TexCombine(unsigned int unitnum, int combinergb, int combinealpha, int rgbscale, int alphascale)
2005 {
2006         gltextureunit_t *unit = gl_state.units + unitnum;
2007         CHECKGLERROR
2008         if (gl_combine.integer)
2009         {
2010                 // GL_ARB_texture_env_combine
2011                 if (!combinergb)
2012                         combinergb = GL_MODULATE;
2013                 if (!combinealpha)
2014                         combinealpha = GL_MODULATE;
2015                 if (!rgbscale)
2016                         rgbscale = 1;
2017                 if (!alphascale)
2018                         alphascale = 1;
2019                 if (unit->combinergb != combinergb)
2020                 {
2021                         unit->combinergb = combinergb;
2022                         GL_ActiveTexture(unitnum);
2023                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
2024                 }
2025                 if (unit->combinealpha != combinealpha)
2026                 {
2027                         unit->combinealpha = combinealpha;
2028                         GL_ActiveTexture(unitnum);
2029                         qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
2030                 }
2031                 if (unit->rgbscale != rgbscale)
2032                 {
2033                         GL_ActiveTexture(unitnum);
2034                         qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = rgbscale));CHECKGLERROR
2035                 }
2036                 if (unit->alphascale != alphascale)
2037                 {
2038                         GL_ActiveTexture(unitnum);
2039                         qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = alphascale));CHECKGLERROR
2040                 }
2041         }
2042         else
2043         {
2044                 // normal GL texenv
2045                 if (!combinergb)
2046                         combinergb = GL_MODULATE;
2047                 if (unit->combinergb != combinergb)
2048                 {
2049                         unit->combinergb = combinergb;
2050                         GL_ActiveTexture(unitnum);
2051                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
2052                 }
2053         }
2054 }
2055
2056 void R_Mesh_TextureState(const rmeshstate_t *m)
2057 {
2058         unsigned int i;
2059
2060         BACKENDACTIVECHECK
2061
2062         CHECKGLERROR
2063         if (gl_backend_rebindtextures)
2064         {
2065                 gl_backend_rebindtextures = false;
2066                 GL_SetupTextureState();
2067                 CHECKGLERROR
2068         }
2069
2070         for (i = 0;i < backendimageunits;i++)
2071                 R_Mesh_TexBindAll(i, m->tex1d[i], m->tex[i], m->tex3d[i], m->texcubemap[i]);
2072         for (i = 0;i < backendarrayunits;i++)
2073         {
2074                 if (m->pointer_texcoord3f[i])
2075                         R_Mesh_TexCoordPointer(i, 3, m->pointer_texcoord3f[i], m->pointer_texcoord_bufferobject[i], m->pointer_texcoord_bufferoffset[i]);
2076                 else
2077                         R_Mesh_TexCoordPointer(i, 2, m->pointer_texcoord[i], m->pointer_texcoord_bufferobject[i], m->pointer_texcoord_bufferoffset[i]);
2078         }
2079         for (i = 0;i < backendunits;i++)
2080         {
2081                 R_Mesh_TexMatrix(i, &m->texmatrix[i]);
2082                 R_Mesh_TexCombine(i, m->texcombinergb[i], m->texcombinealpha[i], m->texrgbscale[i], m->texalphascale[i]);
2083         }
2084         CHECKGLERROR
2085 }
2086
2087 void R_Mesh_ResetTextureState(void)
2088 {
2089         unsigned int unitnum;
2090
2091         BACKENDACTIVECHECK
2092
2093         CHECKGLERROR
2094         if (gl_backend_rebindtextures)
2095         {
2096                 gl_backend_rebindtextures = false;
2097                 GL_SetupTextureState();
2098                 CHECKGLERROR
2099         }
2100
2101         for (unitnum = 0;unitnum < backendimageunits;unitnum++)
2102         {
2103                 gltextureunit_t *unit = gl_state.units + unitnum;
2104                 // update 1d texture binding
2105                 if (unit->t1d)
2106                 {
2107                         GL_ActiveTexture(unitnum);
2108                         if (unitnum < backendunits)
2109                         {
2110                                 qglDisable(GL_TEXTURE_1D);CHECKGLERROR
2111                         }
2112                         unit->t1d = 0;
2113                         qglBindTexture(GL_TEXTURE_1D, unit->t1d);CHECKGLERROR
2114                 }
2115                 // update 2d texture binding
2116                 if (unit->t2d)
2117                 {
2118                         GL_ActiveTexture(unitnum);
2119                         if (unitnum < backendunits)
2120                         {
2121                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
2122                         }
2123                         unit->t2d = 0;
2124                         qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
2125                 }
2126                 // update 3d texture binding
2127                 if (unit->t3d)
2128                 {
2129                         GL_ActiveTexture(unitnum);
2130                         if (unitnum < backendunits)
2131                         {
2132                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
2133                         }
2134                         unit->t3d = 0;
2135                         qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
2136                 }
2137                 // update cubemap texture binding
2138                 if (unit->tcubemap)
2139                 {
2140                         GL_ActiveTexture(unitnum);
2141                         if (unitnum < backendunits)
2142                         {
2143                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
2144                         }
2145                         unit->tcubemap = 0;
2146                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
2147                 }
2148         }
2149         for (unitnum = 0;unitnum < backendarrayunits;unitnum++)
2150         {
2151                 gltextureunit_t *unit = gl_state.units + unitnum;
2152                 // texture array unit is disabled, disable the array
2153                 if (unit->arrayenabled)
2154                 {
2155                         unit->arrayenabled = false;
2156                         GL_ActiveTexture(unitnum);
2157                         qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
2158                 }
2159         }
2160         for (unitnum = 0;unitnum < backendunits;unitnum++)
2161         {
2162                 gltextureunit_t *unit = gl_state.units + unitnum;
2163                 // no texmatrix specified, revert to identity
2164                 if (unit->texmatrixenabled)
2165                 {
2166                         unit->texmatrixenabled = false;
2167                         unit->matrix = identitymatrix;
2168                         CHECKGLERROR
2169                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
2170                         GL_ActiveTexture(unitnum);
2171                         qglLoadIdentity();CHECKGLERROR
2172                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
2173                 }
2174                 if (gl_combine.integer)
2175                 {
2176                         // GL_ARB_texture_env_combine
2177                         if (unit->combinergb != GL_MODULATE)
2178                         {
2179                                 unit->combinergb = GL_MODULATE;
2180                                 GL_ActiveTexture(unitnum);
2181                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
2182                         }
2183                         if (unit->combinealpha != GL_MODULATE)
2184                         {
2185                                 unit->combinealpha = GL_MODULATE;
2186                                 GL_ActiveTexture(unitnum);
2187                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
2188                         }
2189                         if (unit->rgbscale != 1)
2190                         {
2191                                 GL_ActiveTexture(unitnum);
2192                                 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (unit->rgbscale = 1));CHECKGLERROR
2193                         }
2194                         if (unit->alphascale != 1)
2195                         {
2196                                 GL_ActiveTexture(unitnum);
2197                                 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, (unit->alphascale = 1));CHECKGLERROR
2198                         }
2199                 }
2200                 else
2201                 {
2202                         // normal GL texenv
2203                         if (unit->combinergb != GL_MODULATE)
2204                         {
2205                                 unit->combinergb = GL_MODULATE;
2206                                 GL_ActiveTexture(unitnum);
2207                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combinergb);CHECKGLERROR
2208                         }
2209                 }
2210         }
2211 }