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_paranoid = {0, "gl_paranoid", "0", "enables OpenGL error checking and other tests"};
  10 cvar_t gl_printcheckerror = {0, "gl_printcheckerror", "0", "prints all OpenGL error checks, useful to identify location of driver crashes"};
  11
  12 cvar_t r_render = {0, "r_render", "1", "enables rendering 3D views (you want this on!)"};
  13 cvar_t r_renderview = {0, "r_renderview", "1", "enables rendering 3D views (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", "3", "make use of GL_ARB_vertex_buffer_object extension to store static geometry in video memory for faster rendering, 0 disables VBO allocation or use, 1 enables VBOs for vertex and triangle data, 2 only for vertex data, 3 for vertex data and triangle data of simple meshes (ones with only one surface)"};
  20 cvar_t gl_fbo = {CVAR_SAVE, "gl_fbo", "1", "make use of GL_ARB_framebuffer_object extension to enable shadowmaps and other features using pixel formats different from the framebuffer"};
  21
  22 cvar_t v_flipped = {0, "v_flipped", "0", "mirror the screen (poor man's left handed mode)"};
  23 qboolean v_flipped_state = false;
  24
  25 int gl_maxdrawrangeelementsvertices;
  26 int gl_maxdrawrangeelementsindices;
  27
  28 #ifdef DEBUGGL
  29 int errornumber = 0;
  30
  31 void GL_PrintError(int errornumber, char *filename, int linenumber)
  32 {
  33         switch(errornumber)
  34         {
  35 #ifdef GL_INVALID_ENUM
  36         case GL_INVALID_ENUM:
  37                 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
  38                 break;
  39 #endif
  40 #ifdef GL_INVALID_VALUE
  41         case GL_INVALID_VALUE:
  42                 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
  43                 break;
  44 #endif
  45 #ifdef GL_INVALID_OPERATION
  46         case GL_INVALID_OPERATION:
  47                 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
  48                 break;
  49 #endif
  50 #ifdef GL_STACK_OVERFLOW
  51         case GL_STACK_OVERFLOW:
  52                 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
  53                 break;
  54 #endif
  55 #ifdef GL_STACK_UNDERFLOW
  56         case GL_STACK_UNDERFLOW:
  57                 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
  58                 break;
  59 #endif
  60 #ifdef GL_OUT_OF_MEMORY
  61         case GL_OUT_OF_MEMORY:
  62                 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
  63                 break;
  64 #endif
  65 #ifdef GL_TABLE_TOO_LARGE
  66         case GL_TABLE_TOO_LARGE:
  67                 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
  68                 break;
  69 #endif
  70 #ifdef GL_INVALID_FRAMEBUFFER_OPERATION_EXT
  71         case GL_INVALID_FRAMEBUFFER_OPERATION_EXT:
  72                 Con_Printf("GL_INVALID_FRAMEBUFFER_OPERATION at %s:%i\n", filename, linenumber);
  73                 break;
  74 #endif
  75         default:
  76                 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
  77                 break;
  78         }
  79 }
  80 #endif
  81
  82 #define BACKENDACTIVECHECK if (!gl_state.active) Sys_Error("GL backend function called when backend is not active");
  83
  84 void SCR_ScreenShot_f (void);
  85
  86 typedef struct gl_bufferobjectinfo_s
  87 {
  88         int target;
  89         int object;
  90         size_t size;
  91         char name[MAX_QPATH];
  92 }
  93 gl_bufferobjectinfo_t;
  94
  95 typedef struct gltextureunit_s
  96 {
  97         const void *pointer_texcoord;
  98         size_t pointer_texcoord_offset;
  99         int pointer_texcoord_buffer;
 100         int t2d, t3d, tcubemap, trectangle;
 101         int arrayenabled;
 102         unsigned int arraycomponents;
 103         int rgbscale, alphascale;
 104         int combine;
 105         int combinergb, combinealpha;
 106         // texmatrixenabled exists only to avoid unnecessary texmatrix compares
 107         int texmatrixenabled;
 108         matrix4x4_t matrix;
 109 }
 110 gltextureunit_t;
 111
 112 typedef struct gl_state_s
 113 {
 114         int cullface;
 115         int cullfaceenable;
 116         int blendfunc1;
 117         int blendfunc2;
 118         int blend;
 119         GLboolean depthmask;
 120         int colormask; // stored as bottom 4 bits: r g b a (3 2 1 0 order)
 121         int depthtest;
 122         float depthrange[2];
 123         float polygonoffset[2];
 124         int alphatest;
 125         int scissortest;
 126         unsigned int unit;
 127         unsigned int clientunit;
 128         gltextureunit_t units[MAX_TEXTUREUNITS];
 129         float color4f[4];
 130         int lockrange_first;
 131         int lockrange_count;
 132         int vertexbufferobject;
 133         int elementbufferobject;
 134         qboolean pointer_color_enabled;
 135         const void *pointer_vertex;
 136         const void *pointer_color;
 137         size_t pointer_vertex_offset;
 138         size_t pointer_color_offset;
 139         int pointer_vertex_buffer;
 140         int pointer_color_buffer;
 141
 142         memexpandablearray_t bufferobjectinfoarray;
 143
 144         r_viewport_t viewport;
 145         matrix4x4_t modelmatrix;
 146         matrix4x4_t modelviewmatrix;
 147
 148         qboolean active;
 149 }
 150 gl_state_t;
 151
 152 static gl_state_t gl_state;
 153
 154
 155 /*
 156 note: here's strip order for a terrain row:
 157 0--1--2--3--4
 158 |\ |\ |\ |\ |
 159 | \| \| \| \|
 160 A--B--C--D--E
 161 clockwise
 162
 163 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
 164
 165 *elements++ = i + row;
 166 *elements++ = i;
 167 *elements++ = i + row + 1;
 168 *elements++ = i;
 169 *elements++ = i + 1;
 170 *elements++ = i + row + 1;
 171
 172
 173 for (y = 0;y < rows - 1;y++)
 174 {
 175         for (x = 0;x < columns - 1;x++)
 176         {
 177                 i = y * rows + x;
 178                 *elements++ = i + columns;
 179                 *elements++ = i;
 180                 *elements++ = i + columns + 1;
 181                 *elements++ = i;
 182                 *elements++ = i + 1;
 183                 *elements++ = i + columns + 1;
 184         }
 185 }
 186
 187 alternative:
 188 0--1--2--3--4
 189 | /| /|\ | /|
 190 |/ |/ | \|/ |
 191 A--B--C--D--E
 192 counterclockwise
 193
 194 for (y = 0;y < rows - 1;y++)
 195 {
 196         for (x = 0;x < columns - 1;x++)
 197         {
 198                 i = y * rows + x;
 199                 *elements++ = i;
 200                 *elements++ = i + columns;
 201                 *elements++ = i + columns + 1;
 202                 *elements++ = i + columns;
 203                 *elements++ = i + columns + 1;
 204                 *elements++ = i + 1;
 205         }
 206 }
 207 */
 208
 209 int polygonelement3i[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 210 unsigned short polygonelement3s[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 211 int quadelement3i[QUADELEMENTS_MAXQUADS*6];
 212 unsigned short quadelement3s[QUADELEMENTS_MAXQUADS*6];
 213
 214 void GL_VBOStats_f(void)
 215 {
 216         GL_Mesh_ListVBOs(true);
 217 }
 218
 219 static void GL_Backend_ResetState(void);
 220
 221 static void gl_backend_start(void)
 222 {
 223         memset(&gl_state, 0, sizeof(gl_state));
 224
 225         Mem_ExpandableArray_NewArray(&gl_state.bufferobjectinfoarray, r_main_mempool, sizeof(gl_bufferobjectinfo_t), 128);
 226
 227         Con_DPrintf("OpenGL backend started.\n");
 228
 229         CHECKGLERROR
 230
 231         GL_Backend_ResetState();
 232 }
 233
 234 static void gl_backend_shutdown(void)
 235 {
 236         Con_DPrint("OpenGL Backend shutting down\n");
 237
 238         Mem_ExpandableArray_FreeArray(&gl_state.bufferobjectinfoarray);
 239
 240         memset(&gl_state, 0, sizeof(gl_state));
 241 }
 242
 243 static void gl_backend_newmap(void)
 244 {
 245 }
 246
 247 void gl_backend_init(void)
 248 {
 249         int i;
 250
 251         for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
 252         {
 253                 polygonelement3s[i * 3 + 0] = 0;
 254                 polygonelement3s[i * 3 + 1] = i + 1;
 255                 polygonelement3s[i * 3 + 2] = i + 2;
 256         }
 257         // elements for rendering a series of quads as triangles
 258         for (i = 0;i < QUADELEMENTS_MAXQUADS;i++)
 259         {
 260                 quadelement3s[i * 6 + 0] = i * 4;
 261                 quadelement3s[i * 6 + 1] = i * 4 + 1;
 262                 quadelement3s[i * 6 + 2] = i * 4 + 2;
 263                 quadelement3s[i * 6 + 3] = i * 4;
 264                 quadelement3s[i * 6 + 4] = i * 4 + 2;
 265                 quadelement3s[i * 6 + 5] = i * 4 + 3;
 266         }
 267
 268         for (i = 0;i < (POLYGONELEMENTS_MAXPOINTS - 2)*3;i++)
 269                 polygonelement3i[i] = polygonelement3s[i];
 270         for (i = 0;i < QUADELEMENTS_MAXQUADS*3;i++)
 271                 quadelement3i[i] = quadelement3s[i];
 272
 273         Cvar_RegisterVariable(&r_render);
 274         Cvar_RegisterVariable(&r_renderview);
 275         Cvar_RegisterVariable(&r_waterwarp);
 276         Cvar_RegisterVariable(&gl_polyblend);
 277         Cvar_RegisterVariable(&v_flipped);
 278         Cvar_RegisterVariable(&gl_dither);
 279         Cvar_RegisterVariable(&gl_lockarrays);
 280         Cvar_RegisterVariable(&gl_lockarrays_minimumvertices);
 281         Cvar_RegisterVariable(&gl_vbo);
 282         Cvar_RegisterVariable(&gl_paranoid);
 283         Cvar_RegisterVariable(&gl_printcheckerror);
 284
 285         Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
 286         Cvar_RegisterVariable(&gl_mesh_testarrayelement);
 287         Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
 288         Cvar_RegisterVariable(&gl_mesh_prefer_short_elements);
 289
 290         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");
 291
 292         R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
 293 }
 294
 295 void GL_SetMirrorState(qboolean state);
 296
 297 void R_Viewport_TransformToScreen(const r_viewport_t *v, const vec4_t in, vec4_t out)
 298 {
 299         vec4_t temp;
 300         float iw;
 301         Matrix4x4_Transform4 (&v->viewmatrix, in, temp);
 302         Matrix4x4_Transform4 (&v->projectmatrix, temp, out);
 303         iw = 1.0f / out[3];
 304         out[0] = v->x + (out[0] * iw + 1.0f) * v->width * 0.5f;
 305         out[1] = v->y + v->height - (out[1] * iw + 1.0f) * v->height * 0.5f;
 306         out[2] = v->z + (out[2] * iw + 1.0f) * v->depth * 0.5f;
 307 }
 308
 309 static void R_Viewport_ApplyNearClipPlane(r_viewport_t *v, double normalx, double normaly, double normalz, double dist)
 310 {
 311         double q[4];
 312         double d;
 313         float clipPlane[4], v3[3], v4[3];
 314         float normal[3];
 315
 316         // This is inspired by Oblique Depth Projection from http://www.terathon.com/code/oblique.php
 317
 318         VectorSet(normal, normalx, normaly, normalz);
 319         Matrix4x4_Transform3x3(&v->viewmatrix, normal, clipPlane);
 320         VectorScale(normal, dist, v3);
 321         Matrix4x4_Transform(&v->viewmatrix, v3, v4);
 322         // FIXME: LordHavoc: I think this can be done more efficiently somehow but I can't remember the technique
 323         clipPlane[3] = -DotProduct(v4, clipPlane);
 324
 325 #if 0
 326 {
 327         // testing code for comparing results
 328         float clipPlane2[4];
 329         VectorCopy4(clipPlane, clipPlane2);
 330         R_Mesh_Matrix(&identitymatrix);
 331         VectorSet(q, normal[0], normal[1], normal[2], -dist);
 332         qglClipPlane(GL_CLIP_PLANE0, q);
 333         qglGetClipPlane(GL_CLIP_PLANE0, q);
 334         VectorCopy4(q, clipPlane);
 335 }
 336 #endif
 337
 338         // Calculate the clip-space corner point opposite the clipping plane
 339         // as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and
 340         // transform it into camera space by multiplying it
 341         // by the inverse of the projection matrix
 342         q[0] = ((clipPlane[0] < 0.0f ? -1.0f : clipPlane[0] > 0.0f ? 1.0f : 0.0f) + v->m[8]) / v->m[0];
 343         q[1] = ((clipPlane[1] < 0.0f ? -1.0f : clipPlane[1] > 0.0f ? 1.0f : 0.0f) + v->m[9]) / v->m[5];
 344         q[2] = -1.0f;
 345         q[3] = (1.0f + v->m[10]) / v->m[14];
 346
 347         // Calculate the scaled plane vector
 348         d = 2.0f / DotProduct4(clipPlane, q);
 349
 350         // Replace the third row of the projection matrix
 351         v->m[2] = clipPlane[0] * d;
 352         v->m[6] = clipPlane[1] * d;
 353         v->m[10] = clipPlane[2] * d + 1.0f;
 354         v->m[14] = clipPlane[3] * d;
 355 }
 356
 357 void R_Viewport_InitOrtho(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, double x1, double y1, double x2, double y2, double nearclip, double farclip, const double *nearplane)
 358 {
 359         float left = x1, right = x2, bottom = y2, top = y1, zNear = nearclip, zFar = farclip;
 360         memset(v, 0, sizeof(*v));
 361         v->type = R_VIEWPORTTYPE_ORTHO;
 362         v->cameramatrix = *cameramatrix;
 363         v->x = x;
 364         v->y = y;
 365         v->z = 0;
 366         v->width = width;
 367         v->height = height;
 368         v->depth = 1;
 369         v->m[0]  = 2/(right - left);
 370         v->m[5]  = 2/(top - bottom);
 371         v->m[10] = -2/(zFar - zNear);
 372         v->m[12] = - (right + left)/(right - left);
 373         v->m[13] = - (top + bottom)/(top - bottom);
 374         v->m[14] = - (zFar + zNear)/(zFar - zNear);
 375         v->m[15] = 1;
 376
 377         Matrix4x4_Invert_Full(&v->viewmatrix, &v->cameramatrix);
 378         Matrix4x4_FromArrayDoubleGL(&v->projectmatrix, v->m);
 379
 380         if (nearplane)
 381                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 382
 383 #if 0
 384         {
 385                 vec4_t test1;
 386                 vec4_t test2;
 387                 Vector4Set(test1, (x1+x2)*0.5f, (y1+y2)*0.5f, 0.0f, 1.0f);
 388                 R_Viewport_TransformToScreen(v, test1, test2);
 389                 Con_Printf("%f %f %f -> %f %f %f\n", test1[0], test1[1], test1[2], test2[0], test2[1], test2[2]);
 390         }
 391 #endif
 392 }
 393
 394 void R_Viewport_InitPerspective(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, double frustumx, double frustumy, double nearclip, double farclip, const double *nearplane)
 395 {
 396         matrix4x4_t tempmatrix, basematrix;
 397         memset(v, 0, sizeof(*v));
 398
 399         if(v_flipped.integer)
 400                 frustumx = -frustumx;
 401
 402         v->type = R_VIEWPORTTYPE_PERSPECTIVE;
 403         v->cameramatrix = *cameramatrix;
 404         v->x = x;
 405         v->y = y;
 406         v->z = 0;
 407         v->width = width;
 408         v->height = height;
 409         v->depth = 1;
 410         v->m[0]  = 1.0 / frustumx;
 411         v->m[5]  = 1.0 / frustumy;
 412         v->m[10] = -(farclip + nearclip) / (farclip - nearclip);
 413         v->m[11] = -1;
 414         v->m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 415
 416         Matrix4x4_Invert_Full(&tempmatrix, &v->cameramatrix);
 417         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 418         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 419         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 420
 421         Matrix4x4_FromArrayDoubleGL(&v->projectmatrix, v->m);
 422
 423         if (nearplane)
 424                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 425 }
 426
 427 void R_Viewport_InitPerspectiveInfinite(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, double frustumx, double frustumy, double nearclip, const double *nearplane)
 428 {
 429         matrix4x4_t tempmatrix, basematrix;
 430         const double nudge = 1.0 - 1.0 / (1<<23);
 431         memset(v, 0, sizeof(*v));
 432
 433         if(v_flipped.integer)
 434                 frustumx = -frustumx;
 435
 436         v->type = R_VIEWPORTTYPE_PERSPECTIVE_INFINITEFARCLIP;
 437         v->cameramatrix = *cameramatrix;
 438         v->x = x;
 439         v->y = y;
 440         v->z = 0;
 441         v->width = width;
 442         v->height = height;
 443         v->depth = 1;
 444         v->m[ 0] = 1.0 / frustumx;
 445         v->m[ 5] = 1.0 / frustumy;
 446         v->m[10] = -nudge;
 447         v->m[11] = -1;
 448         v->m[14] = -2 * nearclip * nudge;
 449
 450         Matrix4x4_Invert_Full(&tempmatrix, &v->cameramatrix);
 451         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 452         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 453         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 454
 455         Matrix4x4_FromArrayDoubleGL(&v->projectmatrix, v->m);
 456
 457         if (nearplane)
 458                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 459 }
 460
 461 float cubeviewmatrix[6][16] =
 462 {
 463     // standard cubemap projections
 464     { // +X
 465          0, 0,-1, 0,
 466          0,-1, 0, 0,
 467         -1, 0, 0, 0,
 468          0, 0, 0, 1,
 469     },
 470     { // -X
 471          0, 0, 1, 0,
 472          0,-1, 0, 0,
 473          1, 0, 0, 0,
 474          0, 0, 0, 1,
 475     },
 476     { // +Y
 477          1, 0, 0, 0,
 478          0, 0,-1, 0,
 479          0, 1, 0, 0,
 480          0, 0, 0, 1,
 481     },
 482     { // -Y
 483          1, 0, 0, 0,
 484          0, 0, 1, 0,
 485          0,-1, 0, 0,
 486          0, 0, 0, 1,
 487     },
 488     { // +Z
 489          1, 0, 0, 0,
 490          0,-1, 0, 0,
 491          0, 0,-1, 0,
 492          0, 0, 0, 1,
 493     },
 494     { // -Z
 495         -1, 0, 0, 0,
 496          0,-1, 0, 0,
 497          0, 0, 1, 0,
 498          0, 0, 0, 1,
 499     },
 500 };
 501 float rectviewmatrix[6][16] =
 502 {
 503     // sign-preserving cubemap projections
 504     { // +X
 505          0, 0,-1, 0,
 506          0, 1, 0, 0,
 507          1, 0, 0, 0,
 508          0, 0, 0, 1,
 509     },
 510     { // -X
 511          0, 0, 1, 0,
 512          0, 1, 0, 0,
 513          1, 0, 0, 0,
 514          0, 0, 0, 1,
 515     },
 516     { // +Y
 517          1, 0, 0, 0,
 518          0, 0,-1, 0,
 519          0, 1, 0, 0,
 520          0, 0, 0, 1,
 521     },
 522     { // -Y
 523          1, 0, 0, 0,
 524          0, 0, 1, 0,
 525          0, 1, 0, 0,
 526          0, 0, 0, 1,
 527     },
 528     { // +Z
 529          1, 0, 0, 0,
 530          0, 1, 0, 0,
 531          0, 0,-1, 0,
 532          0, 0, 0, 1,
 533     },
 534     { // -Z
 535          1, 0, 0, 0,
 536          0, 1, 0, 0,
 537          0, 0, 1, 0,
 538          0, 0, 0, 1,
 539     },
 540 };
 541
 542 void R_Viewport_InitCubeSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, float nearclip, float farclip, const float *nearplane)
 543 {
 544         matrix4x4_t tempmatrix, basematrix;
 545         memset(v, 0, sizeof(*v));
 546         v->type = R_VIEWPORTTYPE_PERSPECTIVECUBESIDE;
 547         v->cameramatrix = *cameramatrix;
 548         v->width = size;
 549         v->height = size;
 550         v->depth = 1;
 551         v->m[0] = v->m[5] = 1.0f;
 552         v->m[10] = -(farclip + nearclip) / (farclip - nearclip);
 553         v->m[11] = -1;
 554         v->m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 555
 556         Matrix4x4_FromArrayFloatGL(&basematrix, cubeviewmatrix[side]);
 557         Matrix4x4_Invert_Simple(&tempmatrix, &v->cameramatrix);
 558         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 559         Matrix4x4_FromArrayDoubleGL(&v->projectmatrix, v->m);
 560
 561         if (nearplane)
 562                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 563 }
 564
 565 void R_Viewport_InitRectSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, int border, float nearclip, float farclip, const float *nearplane)
 566 {
 567         matrix4x4_t tempmatrix, basematrix;
 568         memset(v, 0, sizeof(*v));
 569         v->type = R_VIEWPORTTYPE_PERSPECTIVECUBESIDE;
 570         v->cameramatrix = *cameramatrix;
 571         v->x = (side & 1) * size;
 572         v->y = (side >> 1) * size;
 573         v->width = size;
 574         v->height = size;
 575         v->depth = 1;
 576         v->m[0] = v->m[5] = 1.0f * ((float)size - border) / size;
 577         v->m[10] = -(farclip + nearclip) / (farclip - nearclip);
 578         v->m[11] = -1;
 579         v->m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 580
 581         Matrix4x4_FromArrayFloatGL(&basematrix, rectviewmatrix[side]);
 582         Matrix4x4_Invert_Simple(&tempmatrix, &v->cameramatrix);
 583         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 584         Matrix4x4_FromArrayDoubleGL(&v->projectmatrix, v->m);
 585
 586         if (nearplane)
 587                 R_Viewport_ApplyNearClipPlane(v, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 588 }
 589
 590 void R_SetViewport(const r_viewport_t *v)
 591 {
 592         float glmatrix[16];
 593         gl_state.viewport = *v;
 594
 595         CHECKGLERROR
 596         qglViewport(v->x, v->y, v->width, v->height);CHECKGLERROR
 597
 598         // Load the projection matrix into OpenGL
 599         qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 600         qglLoadMatrixd(gl_state.viewport.m);CHECKGLERROR
 601         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 602
 603         // FIXME: v_flipped_state is evil, this probably breaks somewhere
 604         GL_SetMirrorState(v_flipped.integer && (v->type == R_VIEWPORTTYPE_PERSPECTIVE || v->type == R_VIEWPORTTYPE_PERSPECTIVE_INFINITEFARCLIP));
 605
 606         // directly force an update of the modelview matrix
 607         Matrix4x4_Concat(&gl_state.modelviewmatrix, &gl_state.viewport.viewmatrix, &gl_state.modelmatrix);
 608         Matrix4x4_ToArrayFloatGL(&gl_state.modelviewmatrix, glmatrix);
 609         qglLoadMatrixf(glmatrix);CHECKGLERROR
 610 }
 611
 612 void R_GetViewport(r_viewport_t *v)
 613 {
 614         *v = gl_state.viewport;
 615 }
 616
 617 static void GL_BindVBO(int bufferobject)
 618 {
 619         if (gl_state.vertexbufferobject != bufferobject)
 620         {
 621                 gl_state.vertexbufferobject = bufferobject;
 622                 CHECKGLERROR
 623                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, bufferobject);
 624                 CHECKGLERROR
 625         }
 626 }
 627
 628 static void GL_BindEBO(int bufferobject)
 629 {
 630         if (gl_state.elementbufferobject != bufferobject)
 631         {
 632                 gl_state.elementbufferobject = bufferobject;
 633                 CHECKGLERROR
 634                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobject);
 635                 CHECKGLERROR
 636         }
 637 }
 638
 639 static void GL_Backend_ResetState(void)
 640 {
 641         unsigned int i;
 642         gl_state.active = true;
 643         gl_state.depthtest = true;
 644         gl_state.alphatest = false;
 645         gl_state.blendfunc1 = GL_ONE;
 646         gl_state.blendfunc2 = GL_ZERO;
 647         gl_state.blend = false;
 648         gl_state.depthmask = GL_TRUE;
 649         gl_state.colormask = 15;
 650         gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
 651         gl_state.lockrange_first = 0;
 652         gl_state.lockrange_count = 0;
 653         gl_state.cullface = v_flipped_state ? GL_BACK : GL_FRONT; // quake is backwards, this culls back faces
 654         gl_state.cullfaceenable = true;
 655         gl_state.polygonoffset[0] = 0;
 656         gl_state.polygonoffset[1] = 0;
 657
 658         CHECKGLERROR
 659
 660         qglColorMask(1, 1, 1, 1);
 661         qglAlphaFunc(GL_GEQUAL, 0.5);CHECKGLERROR
 662         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 663         qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
 664         qglDisable(GL_BLEND);CHECKGLERROR
 665         qglCullFace(gl_state.cullface);CHECKGLERROR
 666         qglEnable(GL_CULL_FACE);CHECKGLERROR
 667         qglDepthFunc(GL_LEQUAL);CHECKGLERROR
 668         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 669         qglDepthMask(gl_state.depthmask);CHECKGLERROR
 670         qglPolygonOffset(gl_state.polygonoffset[0], gl_state.polygonoffset[1]);
 671
 672         if (vid.support.arb_vertex_buffer_object)
 673         {
 674                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 675                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
 676         }
 677
 678         if (vid.support.ext_framebuffer_object)
 679         {
 680                 qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 681                 qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
 682         }
 683
 684         qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
 685         qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
 686
 687         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
 688         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
 689
 690         GL_Color(0, 0, 0, 0);
 691         GL_Color(1, 1, 1, 1);
 692
 693         gl_state.unit = MAX_TEXTUREUNITS;
 694         gl_state.clientunit = MAX_TEXTUREUNITS;
 695         for (i = 0;i < vid.teximageunits;i++)
 696         {
 697                 GL_ActiveTexture(i);
 698                 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
 699                 if (vid.support.ext_texture_3d)
 700                 {
 701                         qglBindTexture(GL_TEXTURE_3D, 0);CHECKGLERROR
 702                 }
 703                 if (vid.support.arb_texture_cube_map)
 704                 {
 705                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);CHECKGLERROR
 706                 }
 707                 if (vid.support.arb_texture_rectangle)
 708                 {
 709                         qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);CHECKGLERROR
 710                 }
 711         }
 712
 713         for (i = 0;i < vid.texarrayunits;i++)
 714         {
 715                 GL_ClientActiveTexture(i);
 716                 GL_BindVBO(0);
 717                 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
 718                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
 719         }
 720
 721         for (i = 0;i < vid.texunits;i++)
 722         {
 723                 GL_ActiveTexture(i);
 724                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
 725                 if (vid.support.ext_texture_3d)
 726                 {
 727                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
 728                 }
 729                 if (vid.support.arb_texture_cube_map)
 730                 {
 731                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
 732                 }
 733                 if (vid.support.arb_texture_rectangle)
 734                 {
 735                         qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
 736                 }
 737                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
 738                 qglLoadIdentity();CHECKGLERROR
 739                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 740                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
 741                 CHECKGLERROR
 742         }
 743         CHECKGLERROR
 744 }
 745
 746 void GL_ActiveTexture(unsigned int num)
 747 {
 748         if (gl_state.unit != num)
 749         {
 750                 gl_state.unit = num;
 751                 if (qglActiveTexture)
 752                 {
 753                         CHECKGLERROR
 754                         qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
 755                         CHECKGLERROR
 756                 }
 757         }
 758 }
 759
 760 void GL_ClientActiveTexture(unsigned int num)
 761 {
 762         if (gl_state.clientunit != num)
 763         {
 764                 gl_state.clientunit = num;
 765                 if (qglActiveTexture)
 766                 {
 767                         CHECKGLERROR
 768                         qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
 769                         CHECKGLERROR
 770                 }
 771         }
 772 }
 773
 774 void GL_BlendFunc(int blendfunc1, int blendfunc2)
 775 {
 776         if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
 777         {
 778                 CHECKGLERROR
 779                 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
 780                 if (gl_state.blendfunc2 == GL_ZERO)
 781                 {
 782                         if (gl_state.blendfunc1 == GL_ONE)
 783                         {
 784                                 if (gl_state.blend)
 785                                 {
 786                                         gl_state.blend = 0;
 787                                         qglDisable(GL_BLEND);CHECKGLERROR
 788                                 }
 789                         }
 790                         else
 791                         {
 792                                 if (!gl_state.blend)
 793                                 {
 794                                         gl_state.blend = 1;
 795                                         qglEnable(GL_BLEND);CHECKGLERROR
 796                                 }
 797                         }
 798                 }
 799                 else
 800                 {
 801                         if (!gl_state.blend)
 802                         {
 803                                 gl_state.blend = 1;
 804                                 qglEnable(GL_BLEND);CHECKGLERROR
 805                         }
 806                 }
 807         }
 808 }
 809
 810 void GL_DepthMask(int state)
 811 {
 812         if (gl_state.depthmask != state)
 813         {
 814                 CHECKGLERROR
 815                 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
 816         }
 817 }
 818
 819 void GL_DepthTest(int state)
 820 {
 821         if (gl_state.depthtest != state)
 822         {
 823                 gl_state.depthtest = state;
 824                 CHECKGLERROR
 825                 if (gl_state.depthtest)
 826                 {
 827                         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 828                 }
 829                 else
 830                 {
 831                         qglDisable(GL_DEPTH_TEST);CHECKGLERROR
 832                 }
 833         }
 834 }
 835
 836 void GL_DepthRange(float nearfrac, float farfrac)
 837 {
 838         if (gl_state.depthrange[0] != nearfrac || gl_state.depthrange[1] != farfrac)
 839         {
 840                 gl_state.depthrange[0] = nearfrac;
 841                 gl_state.depthrange[1] = farfrac;
 842                 qglDepthRange(nearfrac, farfrac);
 843         }
 844 }
 845
 846 void GL_PolygonOffset(float planeoffset, float depthoffset)
 847 {
 848         if (gl_state.polygonoffset[0] != planeoffset || gl_state.polygonoffset[1] != depthoffset)
 849         {
 850                 gl_state.polygonoffset[0] = planeoffset;
 851                 gl_state.polygonoffset[1] = depthoffset;
 852                 qglPolygonOffset(planeoffset, depthoffset);
 853         }
 854 }
 855
 856 void GL_SetMirrorState(qboolean state)
 857 {
 858         if(!state != !v_flipped_state)
 859         {
 860                 // change cull face mode!
 861                 if(gl_state.cullface == GL_BACK)
 862                         qglCullFace((gl_state.cullface = GL_FRONT));
 863                 else if(gl_state.cullface == GL_FRONT)
 864                         qglCullFace((gl_state.cullface = GL_BACK));
 865         }
 866         v_flipped_state = state;
 867 }
 868
 869 void GL_CullFace(int state)
 870 {
 871         CHECKGLERROR
 872
 873         if(v_flipped_state)
 874         {
 875                 if(state == GL_FRONT)
 876                         state = GL_BACK;
 877                 else if(state == GL_BACK)
 878                         state = GL_FRONT;
 879         }
 880
 881         if (state != GL_NONE)
 882         {
 883                 if (!gl_state.cullfaceenable)
 884                 {
 885                         gl_state.cullfaceenable = true;
 886                         qglEnable(GL_CULL_FACE);CHECKGLERROR
 887                 }
 888                 if (gl_state.cullface != state)
 889                 {
 890                         gl_state.cullface = state;
 891                         qglCullFace(gl_state.cullface);CHECKGLERROR
 892                 }
 893         }
 894         else
 895         {
 896                 if (gl_state.cullfaceenable)
 897                 {
 898                         gl_state.cullfaceenable = false;
 899                         qglDisable(GL_CULL_FACE);CHECKGLERROR
 900                 }
 901         }
 902 }
 903
 904 void GL_AlphaTest(int state)
 905 {
 906         if (gl_state.alphatest != state)
 907         {
 908                 gl_state.alphatest = state;
 909                 CHECKGLERROR
 910                 if (gl_state.alphatest)
 911                 {
 912                         qglEnable(GL_ALPHA_TEST);CHECKGLERROR
 913                 }
 914                 else
 915                 {
 916                         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 917                 }
 918         }
 919 }
 920
 921 void GL_ColorMask(int r, int g, int b, int a)
 922 {
 923         int state = r*8 + g*4 + b*2 + a*1;
 924         if (gl_state.colormask != state)
 925         {
 926                 gl_state.colormask = state;
 927                 CHECKGLERROR
 928                 qglColorMask((GLboolean)r, (GLboolean)g, (GLboolean)b, (GLboolean)a);CHECKGLERROR
 929         }
 930 }
 931
 932 void GL_Color(float cr, float cg, float cb, float ca)
 933 {
 934         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)
 935         {
 936                 gl_state.color4f[0] = cr;
 937                 gl_state.color4f[1] = cg;
 938                 gl_state.color4f[2] = cb;
 939                 gl_state.color4f[3] = ca;
 940                 CHECKGLERROR
 941                 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
 942                 CHECKGLERROR
 943         }
 944 }
 945
 946 void GL_LockArrays(int first, int count)
 947 {
 948         if (count < gl_lockarrays_minimumvertices.integer)
 949         {
 950                 first = 0;
 951                 count = 0;
 952         }
 953         if (gl_state.lockrange_count != count || gl_state.lockrange_first != first)
 954         {
 955                 if (gl_state.lockrange_count)
 956                 {
 957                         gl_state.lockrange_count = 0;
 958                         CHECKGLERROR
 959                         qglUnlockArraysEXT();
 960                         CHECKGLERROR
 961                 }
 962                 if (count && vid.support.ext_compiled_vertex_array && gl_lockarrays.integer)
 963                 {
 964                         gl_state.lockrange_first = first;
 965                         gl_state.lockrange_count = count;
 966                         CHECKGLERROR
 967                         qglLockArraysEXT(first, count);
 968                         CHECKGLERROR
 969                 }
 970         }
 971 }
 972
 973 void GL_Scissor (int x, int y, int width, int height)
 974 {
 975         CHECKGLERROR
 976         qglScissor(x, y,width,height);
 977         CHECKGLERROR
 978 }
 979
 980 void GL_ScissorTest(int state)
 981 {
 982         if(gl_state.scissortest == state)
 983                 return;
 984
 985         CHECKGLERROR
 986         if((gl_state.scissortest = state))
 987                 qglEnable(GL_SCISSOR_TEST);
 988         else
 989                 qglDisable(GL_SCISSOR_TEST);
 990         CHECKGLERROR
 991 }
 992
 993 void GL_Clear(int mask)
 994 {
 995         CHECKGLERROR
 996         qglClear(mask);CHECKGLERROR
 997 }
 998
 999 // called at beginning of frame
1000 void R_Mesh_Start(void)
1001 {
1002         BACKENDACTIVECHECK
1003         CHECKGLERROR
1004         if (gl_printcheckerror.integer && !gl_paranoid.integer)
1005         {
1006                 Con_Printf("WARNING: gl_printcheckerror is on but gl_paranoid is off, turning it on...\n");
1007                 Cvar_SetValueQuick(&gl_paranoid, 1);
1008         }
1009 }
1010
1011 qboolean GL_Backend_CompileShader(int programobject, GLenum shadertypeenum, const char *shadertype, int numstrings, const char **strings)
1012 {
1013         int shaderobject;
1014         int shadercompiled;
1015         char compilelog[MAX_INPUTLINE];
1016         shaderobject = qglCreateShaderObjectARB(shadertypeenum);CHECKGLERROR
1017         if (!shaderobject)
1018                 return false;
1019         qglShaderSourceARB(shaderobject, numstrings, strings, NULL);CHECKGLERROR
1020         qglCompileShaderARB(shaderobject);CHECKGLERROR
1021         qglGetObjectParameterivARB(shaderobject, GL_OBJECT_COMPILE_STATUS_ARB, &shadercompiled);CHECKGLERROR
1022         qglGetInfoLogARB(shaderobject, sizeof(compilelog), NULL, compilelog);CHECKGLERROR
1023         if (compilelog[0] && developer.integer > 0)
1024         {
1025                 int i, j, pretextlines = 0;
1026                 for (i = 0;i < numstrings - 1;i++)
1027                         for (j = 0;strings[i][j];j++)
1028                                 if (strings[i][j] == '\n')
1029                                         pretextlines++;
1030                 Con_DPrintf("%s shader compile log:\n%s\n(line offset for any above warnings/errors: %i)\n", shadertype, compilelog, pretextlines);
1031         }
1032         if (!shadercompiled)
1033         {
1034                 qglDeleteObjectARB(shaderobject);CHECKGLERROR
1035                 return false;
1036         }
1037         qglAttachObjectARB(programobject, shaderobject);CHECKGLERROR
1038         qglDeleteObjectARB(shaderobject);CHECKGLERROR
1039         return true;
1040 }
1041
1042 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)
1043 {
1044         GLint programlinked;
1045         GLuint programobject = 0;
1046         char linklog[MAX_INPUTLINE];
1047         CHECKGLERROR
1048
1049         programobject = qglCreateProgramObjectARB();CHECKGLERROR
1050         if (!programobject)
1051                 return 0;
1052
1053         if (vertexstrings_count && !GL_Backend_CompileShader(programobject, GL_VERTEX_SHADER_ARB, "vertex", vertexstrings_count, vertexstrings_list))
1054                 goto cleanup;
1055
1056 #ifdef GL_GEOMETRY_SHADER_ARB
1057         if (geometrystrings_count && !GL_Backend_CompileShader(programobject, GL_GEOMETRY_SHADER_ARB, "geometry", geometrystrings_count, geometrystrings_list))
1058                 goto cleanup;
1059 #endif
1060
1061         if (fragmentstrings_count && !GL_Backend_CompileShader(programobject, GL_FRAGMENT_SHADER_ARB, "fragment", fragmentstrings_count, fragmentstrings_list))
1062                 goto cleanup;
1063
1064         qglLinkProgramARB(programobject);CHECKGLERROR
1065         qglGetObjectParameterivARB(programobject, GL_OBJECT_LINK_STATUS_ARB, &programlinked);CHECKGLERROR
1066         qglGetInfoLogARB(programobject, sizeof(linklog), NULL, linklog);CHECKGLERROR
1067         if (linklog[0])
1068         {
1069                 Con_DPrintf("program link log:\n%s\n", linklog);
1070                 // software vertex shader is ok but software fragment shader is WAY
1071                 // too slow, fail program if so.
1072                 // NOTE: this string might be ATI specific, but that's ok because the
1073                 // ATI R300 chip (Radeon 9500-9800/X300) is the most likely to use a
1074                 // software fragment shader due to low instruction and dependent
1075                 // texture limits.
1076                 if (strstr(linklog, "fragment shader will run in software"))
1077                         programlinked = false;
1078         }
1079         if (!programlinked)
1080                 goto cleanup;
1081         return programobject;
1082 cleanup:
1083         qglDeleteObjectARB(programobject);CHECKGLERROR
1084         return 0;
1085 }
1086
1087 void GL_Backend_FreeProgram(unsigned int prog)
1088 {
1089         CHECKGLERROR
1090         qglDeleteObjectARB(prog);
1091         CHECKGLERROR
1092 }
1093
1094 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
1095 {
1096         int i;
1097         if (offset)
1098         {
1099                 for (i = 0;i < count;i++)
1100                         *out++ = *in++ + offset;
1101         }
1102         else
1103                 memcpy(out, in, sizeof(*out) * count);
1104 }
1105
1106 // renders triangles using vertices from the active arrays
1107 int paranoidblah = 0;
1108 void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtriangles, const int *element3i, const unsigned short *element3s, int bufferobject3i, int bufferobject3s)
1109 {
1110         unsigned int numelements = numtriangles * 3;
1111         if (numvertices < 3 || numtriangles < 1)
1112         {
1113                 if (numvertices < 0 || numtriangles < 0 || developer.integer >= 100)
1114                         Con_Printf("R_Mesh_Draw(%d, %d, %d, %d, %8p, %8p, %i, %i);\n", firstvertex, numvertices, firsttriangle, numtriangles, (void *)element3i, (void *)element3s, bufferobject3i, bufferobject3s);
1115                 return;
1116         }
1117         if (!gl_mesh_prefer_short_elements.integer)
1118         {
1119                 if (element3i)
1120                         element3s = NULL;
1121                 if (bufferobject3i)
1122                         bufferobject3s = 0;
1123         }
1124         if (element3i)
1125                 element3i += firsttriangle * 3;
1126         if (element3s)
1127                 element3s += firsttriangle * 3;
1128         switch (gl_vbo.integer)
1129         {
1130         default:
1131         case 0:
1132         case 2:
1133                 bufferobject3i = bufferobject3s = 0;
1134                 break;
1135         case 1:
1136                 break;
1137         case 3:
1138                 if (firsttriangle)
1139                         bufferobject3i = bufferobject3s = 0;
1140                 break;
1141         }
1142         CHECKGLERROR
1143         r_refdef.stats.meshes++;
1144         r_refdef.stats.meshes_elements += numelements;
1145         if (gl_paranoid.integer)
1146         {
1147                 unsigned int i, j, size;
1148                 const int *p;
1149                 // note: there's no validation done here on buffer objects because it
1150                 // is somewhat difficult to get at the data, and gl_paranoid can be
1151                 // used without buffer objects if the need arises
1152                 // (the data could be gotten using glMapBuffer but it would be very
1153                 //  slow due to uncachable video memory reads)
1154                 if (!qglIsEnabled(GL_VERTEX_ARRAY))
1155                         Con_Print("R_Mesh_Draw: vertex array not enabled\n");
1156                 CHECKGLERROR
1157                 if (gl_state.pointer_vertex)
1158                         for (j = 0, size = numvertices * 3, p = (int *)((float *)gl_state.pointer_vertex + firstvertex * 3);j < size;j++, p++)
1159                                 paranoidblah += *p;
1160                 if (gl_state.pointer_color_enabled)
1161                 {
1162                         if (!qglIsEnabled(GL_COLOR_ARRAY))
1163                                 Con_Print("R_Mesh_Draw: color array set but not enabled\n");
1164                         CHECKGLERROR
1165                         if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1166                                 for (j = 0, size = numvertices * 4, p = (int *)((float *)gl_state.pointer_color + firstvertex * 4);j < size;j++, p++)
1167                                         paranoidblah += *p;
1168                 }
1169                 for (i = 0;i < vid.texarrayunits;i++)
1170                 {
1171                         if (gl_state.units[i].arrayenabled)
1172                         {
1173                                 GL_ClientActiveTexture(i);
1174                                 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
1175                                         Con_Print("R_Mesh_Draw: texcoord array set but not enabled\n");
1176                                 CHECKGLERROR
1177                                 if (gl_state.units[i].pointer_texcoord && gl_state.units[i].arrayenabled)
1178                                         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++)
1179                                                 paranoidblah += *p;
1180                         }
1181                 }
1182                 if (element3i)
1183                 {
1184                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1185                         {
1186                                 if (element3i[i] < firstvertex || element3i[i] >= firstvertex + numvertices)
1187                                 {
1188                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3i array\n", element3i[i], firstvertex, firstvertex + numvertices);
1189                                         return;
1190                                 }
1191                         }
1192                 }
1193                 if (element3s)
1194                 {
1195                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1196                         {
1197                                 if (element3s[i] < firstvertex || element3s[i] >= firstvertex + numvertices)
1198                                 {
1199                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3s array\n", element3s[i], firstvertex, firstvertex + numvertices);
1200                                         return;
1201                                 }
1202                         }
1203                 }
1204                 CHECKGLERROR
1205         }
1206         if (r_render.integer || r_refdef.draw2dstage)
1207         {
1208                 CHECKGLERROR
1209                 if (gl_mesh_testmanualfeeding.integer)
1210                 {
1211                         unsigned int i, j, element;
1212                         const GLfloat *p;
1213                         qglBegin(GL_TRIANGLES);
1214                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1215                         {
1216                                 element = element3i ? element3i[i] : element3s[i];
1217                                 for (j = 0;j < vid.texarrayunits;j++)
1218                                 {
1219                                         if (gl_state.units[j].pointer_texcoord && gl_state.units[j].arrayenabled)
1220                                         {
1221                                                 if (vid.texarrayunits > 1)
1222                                                 {
1223                                                         if (gl_state.units[j].arraycomponents == 4)
1224                                                         {
1225                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1226                                                                 qglMultiTexCoord4f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2], p[3]);
1227                                                         }
1228                                                         else if (gl_state.units[j].arraycomponents == 3)
1229                                                         {
1230                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1231                                                                 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
1232                                                         }
1233                                                         else if (gl_state.units[j].arraycomponents == 2)
1234                                                         {
1235                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1236                                                                 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
1237                                                         }
1238                                                         else
1239                                                         {
1240                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1241                                                                 qglMultiTexCoord1f(GL_TEXTURE0_ARB + j, p[0]);
1242                                                         }
1243                                                 }
1244                                                 else
1245                                                 {
1246                                                         if (gl_state.units[j].arraycomponents == 4)
1247                                                         {
1248                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1249                                                                 qglTexCoord4f(p[0], p[1], p[2], p[3]);
1250                                                         }
1251                                                         else if (gl_state.units[j].arraycomponents == 3)
1252                                                         {
1253                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1254                                                                 qglTexCoord3f(p[0], p[1], p[2]);
1255                                                         }
1256                                                         else if (gl_state.units[j].arraycomponents == 2)
1257                                                         {
1258                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1259                                                                 qglTexCoord2f(p[0], p[1]);
1260                                                         }
1261                                                         else
1262                                                         {
1263                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1264                                                                 qglTexCoord1f(p[0]);
1265                                                         }
1266                                                 }
1267                                         }
1268                                 }
1269                                 if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1270                                 {
1271                                         p = ((const GLfloat *)(gl_state.pointer_color)) + element * 4;
1272                                         qglColor4f(p[0], p[1], p[2], p[3]);
1273                                 }
1274                                 p = ((const GLfloat *)(gl_state.pointer_vertex)) + element * 3;
1275                                 qglVertex3f(p[0], p[1], p[2]);
1276                         }
1277                         qglEnd();
1278                         CHECKGLERROR
1279                 }
1280                 else if (gl_mesh_testarrayelement.integer)
1281                 {
1282                         int i;
1283                         qglBegin(GL_TRIANGLES);
1284                         if (element3i)
1285                         {
1286                                 for (i = 0;i < numtriangles * 3;i++)
1287                                         qglArrayElement(element3i[i]);
1288                         }
1289                         else if (element3s)
1290                         {
1291                                 for (i = 0;i < numtriangles * 3;i++)
1292                                         qglArrayElement(element3s[i]);
1293                         }
1294                         qglEnd();
1295                         CHECKGLERROR
1296                 }
1297                 else if (bufferobject3s)
1298                 {
1299                         GL_BindEBO(bufferobject3s);
1300                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1301                         {
1302                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1303                                 CHECKGLERROR
1304                         }
1305                         else
1306                         {
1307                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1308                                 CHECKGLERROR
1309                         }
1310                 }
1311                 else if (bufferobject3i)
1312                 {
1313                         GL_BindEBO(bufferobject3i);
1314                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1315                         {
1316                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1317                                 CHECKGLERROR
1318                         }
1319                         else
1320                         {
1321                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1322                                 CHECKGLERROR
1323                         }
1324                 }
1325                 else if (element3s)
1326                 {
1327                         GL_BindEBO(0);
1328                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1329                         {
1330                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, element3s);
1331                                 CHECKGLERROR
1332                         }
1333                         else
1334                         {
1335                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, element3s);
1336                                 CHECKGLERROR
1337                         }
1338                 }
1339                 else if (element3i)
1340                 {
1341                         GL_BindEBO(0);
1342                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1343                         {
1344                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, element3i);
1345                                 CHECKGLERROR
1346                         }
1347                         else
1348                         {
1349                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, element3i);
1350                                 CHECKGLERROR
1351                         }
1352                 }
1353         }
1354 }
1355
1356 // restores backend state, used when done with 3D rendering
1357 void R_Mesh_Finish(void)
1358 {
1359 }
1360
1361 int R_Mesh_CreateStaticBufferObject(unsigned int target, void *data, size_t size, const char *name)
1362 {
1363         gl_bufferobjectinfo_t *info;
1364         GLuint bufferobject;
1365
1366         if (!gl_vbo.integer)
1367                 return 0;
1368
1369         qglGenBuffersARB(1, &bufferobject);
1370         switch(target)
1371         {
1372         case GL_ELEMENT_ARRAY_BUFFER_ARB: GL_BindEBO(bufferobject);break;
1373         case GL_ARRAY_BUFFER_ARB: GL_BindVBO(bufferobject);break;
1374         default: Sys_Error("R_Mesh_CreateStaticBufferObject: unknown target type %i\n", target);return 0;
1375         }
1376         qglBufferDataARB(target, size, data, GL_STATIC_DRAW_ARB);
1377
1378         info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_AllocRecord(&gl_state.bufferobjectinfoarray);
1379         memset(info, 0, sizeof(*info));
1380         info->target = target;
1381         info->object = bufferobject;
1382         info->size = size;
1383         strlcpy(info->name, name, sizeof(info->name));
1384
1385         return (int)bufferobject;
1386 }
1387
1388 void R_Mesh_DestroyBufferObject(int bufferobject)
1389 {
1390         int i, endindex;
1391         gl_bufferobjectinfo_t *info;
1392
1393         qglDeleteBuffersARB(1, (GLuint *)&bufferobject);
1394
1395         endindex = Mem_ExpandableArray_IndexRange(&gl_state.bufferobjectinfoarray);
1396         for (i = 0;i < endindex;i++)
1397         {
1398                 info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_RecordAtIndex(&gl_state.bufferobjectinfoarray, i);
1399                 if (!info)
1400                         continue;
1401                 if (info->object == bufferobject)
1402                 {
1403                         Mem_ExpandableArray_FreeRecord(&gl_state.bufferobjectinfoarray, (void *)info);
1404                         break;
1405                 }
1406         }
1407 }
1408
1409 void GL_Mesh_ListVBOs(qboolean printeach)
1410 {
1411         int i, endindex;
1412         size_t ebocount = 0, ebomemory = 0;
1413         size_t vbocount = 0, vbomemory = 0;
1414         gl_bufferobjectinfo_t *info;
1415         endindex = Mem_ExpandableArray_IndexRange(&gl_state.bufferobjectinfoarray);
1416         for (i = 0;i < endindex;i++)
1417         {
1418                 info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_RecordAtIndex(&gl_state.bufferobjectinfoarray, i);
1419                 if (!info)
1420                         continue;
1421                 switch(info->target)
1422                 {
1423                 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;
1424                 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;
1425                 default: Con_Printf("gl_vbostats: unknown target type %i\n", info->target);break;
1426                 }
1427         }
1428         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);
1429 }
1430
1431 void R_Mesh_Matrix(const matrix4x4_t *matrix)
1432 {
1433         if (memcmp(matrix, &gl_state.modelmatrix, sizeof(matrix4x4_t)))
1434         {
1435                 float glmatrix[16];
1436                 gl_state.modelmatrix = *matrix;
1437                 Matrix4x4_Concat(&gl_state.modelviewmatrix, &gl_state.viewport.viewmatrix, &gl_state.modelmatrix);
1438                 Matrix4x4_ToArrayFloatGL(&gl_state.modelviewmatrix, glmatrix);
1439                 CHECKGLERROR
1440                 qglLoadMatrixf(glmatrix);CHECKGLERROR
1441         }
1442 }
1443
1444 void R_Mesh_VertexPointer(const float *vertex3f, int bufferobject, size_t bufferoffset)
1445 {
1446         if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1447                 bufferobject = 0;
1448         if (gl_state.pointer_vertex != vertex3f || gl_state.pointer_vertex_buffer != bufferobject || gl_state.pointer_vertex_offset != bufferoffset)
1449         {
1450                 gl_state.pointer_vertex = vertex3f;
1451                 gl_state.pointer_vertex_buffer = bufferobject;
1452                 gl_state.pointer_vertex_offset = bufferoffset;
1453                 CHECKGLERROR
1454                 GL_BindVBO(bufferobject);
1455                 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), bufferobject ? (void *)bufferoffset : vertex3f);CHECKGLERROR
1456         }
1457 }
1458
1459 void R_Mesh_ColorPointer(const float *color4f, int bufferobject, size_t bufferoffset)
1460 {
1461         // note: this can not rely on bufferobject to decide whether a color array
1462         // is supplied, because surfmesh_t shares one vbo for all arrays, which
1463         // means that a valid vbo may be supplied even if there is no color array.
1464         if (color4f)
1465         {
1466                 if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1467                         bufferobject = 0;
1468                 // caller wants color array enabled
1469                 if (!gl_state.pointer_color_enabled)
1470                 {
1471                         gl_state.pointer_color_enabled = true;
1472                         CHECKGLERROR
1473                         qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1474                 }
1475                 if (gl_state.pointer_color != color4f || gl_state.pointer_color_buffer != bufferobject || gl_state.pointer_color_offset != bufferoffset)
1476                 {
1477                         gl_state.pointer_color = color4f;
1478                         gl_state.pointer_color_buffer = bufferobject;
1479                         gl_state.pointer_color_offset = bufferoffset;
1480                         CHECKGLERROR
1481                         GL_BindVBO(bufferobject);
1482                         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), bufferobject ? (void *)bufferoffset : color4f);CHECKGLERROR
1483                 }
1484         }
1485         else
1486         {
1487                 // caller wants color array disabled
1488                 if (gl_state.pointer_color_enabled)
1489                 {
1490                         gl_state.pointer_color_enabled = false;
1491                         CHECKGLERROR
1492                         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1493                         // when color array is on the glColor gets trashed, set it again
1494                         qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);CHECKGLERROR
1495                 }
1496         }
1497 }
1498
1499 void R_Mesh_TexCoordPointer(unsigned int unitnum, unsigned int numcomponents, const float *texcoord, int bufferobject, size_t bufferoffset)
1500 {
1501         gltextureunit_t *unit = gl_state.units + unitnum;
1502         // update array settings
1503         CHECKGLERROR
1504         // note: there is no need to check bufferobject here because all cases
1505         // that involve a valid bufferobject also supply a texcoord array
1506         if (texcoord)
1507         {
1508                 if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1509                         bufferobject = 0;
1510                 // texture array unit is enabled, enable the array
1511                 if (!unit->arrayenabled)
1512                 {
1513                         unit->arrayenabled = true;
1514                         GL_ClientActiveTexture(unitnum);
1515                         qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1516                 }
1517                 // texcoord array
1518                 if (unit->pointer_texcoord != texcoord || unit->pointer_texcoord_buffer != bufferobject || unit->pointer_texcoord_offset != bufferoffset || unit->arraycomponents != numcomponents)
1519                 {
1520                         unit->pointer_texcoord = texcoord;
1521                         unit->pointer_texcoord_buffer = bufferobject;
1522                         unit->pointer_texcoord_offset = bufferoffset;
1523                         unit->arraycomponents = numcomponents;
1524                         GL_ClientActiveTexture(unitnum);
1525                         GL_BindVBO(bufferobject);
1526                         qglTexCoordPointer(unit->arraycomponents, GL_FLOAT, sizeof(float) * unit->arraycomponents, bufferobject ? (void *)bufferoffset : texcoord);CHECKGLERROR
1527                 }
1528         }
1529         else
1530         {
1531                 // texture array unit is disabled, disable the array
1532                 if (unit->arrayenabled)
1533                 {
1534                         unit->arrayenabled = false;
1535                         GL_ClientActiveTexture(unitnum);
1536                         qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1537                 }
1538         }
1539 }
1540
1541 void R_Mesh_TexBindAll(unsigned int unitnum, int tex2d, int tex3d, int texcubemap, int texrectangle)
1542 {
1543         gltextureunit_t *unit = gl_state.units + unitnum;
1544         if (unitnum >= vid.teximageunits)
1545                 return;
1546         // update 2d texture binding
1547         if (unit->t2d != tex2d)
1548         {
1549                 GL_ActiveTexture(unitnum);
1550                 if (unitnum < vid.texunits)
1551                 {
1552                         if (tex2d)
1553                         {
1554                                 if (unit->t2d == 0)
1555                                 {
1556                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1557                                 }
1558                         }
1559                         else
1560                         {
1561                                 if (unit->t2d)
1562                                 {
1563                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1564                                 }
1565                         }
1566                 }
1567                 unit->t2d = tex2d;
1568                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1569         }
1570         // update 3d texture binding
1571         if (unit->t3d != tex3d)
1572         {
1573                 GL_ActiveTexture(unitnum);
1574                 if (unitnum < vid.texunits)
1575                 {
1576                         if (tex3d)
1577                         {
1578                                 if (unit->t3d == 0)
1579                                 {
1580                                         qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1581                                 }
1582                         }
1583                         else
1584                         {
1585                                 if (unit->t3d)
1586                                 {
1587                                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1588                                 }
1589                         }
1590                 }
1591                 unit->t3d = tex3d;
1592                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1593         }
1594         // update cubemap texture binding
1595         if (unit->tcubemap != texcubemap)
1596         {
1597                 GL_ActiveTexture(unitnum);
1598                 if (unitnum < vid.texunits)
1599                 {
1600                         if (texcubemap)
1601                         {
1602                                 if (unit->tcubemap == 0)
1603                                 {
1604                                         qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1605                                 }
1606                         }
1607                         else
1608                         {
1609                                 if (unit->tcubemap)
1610                                 {
1611                                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1612                                 }
1613                         }
1614                 }
1615                 unit->tcubemap = texcubemap;
1616                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1617         }
1618         // update rectangle texture binding
1619         if (unit->trectangle != texrectangle)
1620         {
1621                 GL_ActiveTexture(unitnum);
1622                 if (unitnum < vid.texunits)
1623                 {
1624                         if (texrectangle)
1625                         {
1626                                 if (unit->trectangle == 0)
1627                                 {
1628                                         qglEnable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1629                                 }
1630                         }
1631                         else
1632                         {
1633                                 if (unit->trectangle)
1634                                 {
1635                                         qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1636                                 }
1637                         }
1638                 }
1639                 unit->trectangle = texrectangle;
1640                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1641         }
1642 }
1643
1644 void R_Mesh_TexBind(unsigned int unitnum, int texnum)
1645 {
1646         gltextureunit_t *unit = gl_state.units + unitnum;
1647         if (unitnum >= vid.teximageunits)
1648                 return;
1649         // update 2d texture binding
1650         if (unit->t2d != texnum)
1651         {
1652                 GL_ActiveTexture(unitnum);
1653                 if (unitnum < vid.texunits)
1654                 {
1655                         if (texnum)
1656                         {
1657                                 if (unit->t2d == 0)
1658                                 {
1659                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1660                                 }
1661                         }
1662                         else
1663                         {
1664                                 if (unit->t2d)
1665                                 {
1666                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1667                                 }
1668                         }
1669                 }
1670                 unit->t2d = texnum;
1671                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1672         }
1673         // update 3d texture binding
1674         if (unit->t3d)
1675         {
1676                 GL_ActiveTexture(unitnum);
1677                 if (unitnum < vid.texunits)
1678                 {
1679                         if (unit->t3d)
1680                         {
1681                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1682                         }
1683                 }
1684                 unit->t3d = 0;
1685                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1686         }
1687         // update cubemap texture binding
1688         if (unit->tcubemap != 0)
1689         {
1690                 GL_ActiveTexture(unitnum);
1691                 if (unitnum < vid.texunits)
1692                 {
1693                         if (unit->tcubemap)
1694                         {
1695                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1696                         }
1697                 }
1698                 unit->tcubemap = 0;
1699                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1700         }
1701         // update rectangle texture binding
1702         if (unit->trectangle != 0)
1703         {
1704                 GL_ActiveTexture(unitnum);
1705                 if (unitnum < vid.texunits)
1706                 {
1707                         if (unit->trectangle)
1708                         {
1709                                 qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1710                         }
1711                 }
1712                 unit->trectangle = 0;
1713                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1714         }
1715 }
1716
1717 static const float gl_identitymatrix[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1};
1718
1719 void R_Mesh_TexMatrix(unsigned int unitnum, const matrix4x4_t *matrix)
1720 {
1721         gltextureunit_t *unit = gl_state.units + unitnum;
1722         if (matrix->m[3][3])
1723         {
1724                 // texmatrix specified, check if it is different
1725                 if (!unit->texmatrixenabled || memcmp(&unit->matrix, matrix, sizeof(matrix4x4_t)))
1726                 {
1727                         float glmatrix[16];
1728                         unit->texmatrixenabled = true;
1729                         unit->matrix = *matrix;
1730                         CHECKGLERROR
1731                         Matrix4x4_ToArrayFloatGL(&unit->matrix, glmatrix);
1732                         GL_ActiveTexture(unitnum);
1733                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1734                         qglLoadMatrixf(glmatrix);CHECKGLERROR
1735                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1736                 }
1737         }
1738         else
1739         {
1740                 // no texmatrix specified, revert to identity
1741                 if (unit->texmatrixenabled)
1742                 {
1743                         unit->texmatrixenabled = false;
1744                         unit->matrix = identitymatrix;
1745                         CHECKGLERROR
1746                         GL_ActiveTexture(unitnum);
1747                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1748                         qglLoadIdentity();CHECKGLERROR
1749                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1750                 }
1751         }
1752 }
1753
1754 void R_Mesh_TexCombine(unsigned int unitnum, int combinergb, int combinealpha, int rgbscale, int alphascale)
1755 {
1756         gltextureunit_t *unit = gl_state.units + unitnum;
1757         CHECKGLERROR
1758         switch(vid.renderpath)
1759         {
1760         case RENDERPATH_GL20:
1761                 // do nothing
1762                 break;
1763         case RENDERPATH_GL13:
1764                 // GL_ARB_texture_env_combine
1765                 if (!combinergb)
1766                         combinergb = GL_MODULATE;
1767                 if (!combinealpha)
1768                         combinealpha = GL_MODULATE;
1769                 if (!rgbscale)
1770                         rgbscale = 1;
1771                 if (!alphascale)
1772                         alphascale = 1;
1773                 if (combinergb != combinealpha || rgbscale != 1 || alphascale != 1 || combinergb == GL_DOT3_RGBA_ARB || combinergb == GL_DOT3_RGB_ARB)
1774                 {
1775                         if (combinergb == GL_DECAL)
1776                                 combinergb = GL_INTERPOLATE_ARB;
1777                         if (unit->combine != GL_COMBINE_ARB)
1778                         {
1779                                 unit->combine = GL_COMBINE_ARB;
1780                                 GL_ActiveTexture(unitnum);
1781                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
1782                                 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
1783                         }
1784                         if (unit->combinergb != combinergb)
1785                         {
1786                                 unit->combinergb = combinergb;
1787                                 GL_ActiveTexture(unitnum);
1788                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
1789                         }
1790                         if (unit->combinealpha != combinealpha)
1791                         {
1792                                 unit->combinealpha = combinealpha;
1793                                 GL_ActiveTexture(unitnum);
1794                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
1795                         }
1796                         if (unit->rgbscale != rgbscale)
1797                         {
1798                                 unit->rgbscale = rgbscale;
1799                                 GL_ActiveTexture(unitnum);
1800                                 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, unit->rgbscale);CHECKGLERROR
1801                         }
1802                         if (unit->alphascale != alphascale)
1803                         {
1804                                 unit->alphascale = alphascale;
1805                                 GL_ActiveTexture(unitnum);
1806                                 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, unit->alphascale);CHECKGLERROR
1807                         }
1808                 }
1809                 else
1810                 {
1811                         if (unit->combine != combinergb)
1812                         {
1813                                 unit->combine = combinergb;
1814                                 GL_ActiveTexture(unitnum);
1815                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1816                         }
1817                 }
1818                 break;
1819         case RENDERPATH_GL11:
1820                 // normal GL texenv
1821                 if (!combinergb)
1822                         combinergb = GL_MODULATE;
1823                 if (unit->combine != combinergb)
1824                 {
1825                         unit->combine = combinergb;
1826                         GL_ActiveTexture(unitnum);
1827                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1828                 }
1829                 break;
1830         }
1831 }
1832
1833 void R_Mesh_TextureState(const rmeshstate_t *m)
1834 {
1835         unsigned int i;
1836
1837         BACKENDACTIVECHECK
1838
1839         CHECKGLERROR
1840         for (i = 0;i < vid.teximageunits;i++)
1841                 R_Mesh_TexBindAll(i, m->tex[i], m->tex3d[i], m->texcubemap[i], m->texrectangle[i]);
1842         for (i = 0;i < vid.texarrayunits;i++)
1843         {
1844                 if (m->pointer_texcoord3f[i])
1845                         R_Mesh_TexCoordPointer(i, 3, m->pointer_texcoord3f[i], m->pointer_texcoord_bufferobject[i], m->pointer_texcoord_bufferoffset[i]);
1846                 else
1847                         R_Mesh_TexCoordPointer(i, 2, m->pointer_texcoord[i], m->pointer_texcoord_bufferobject[i], m->pointer_texcoord_bufferoffset[i]);
1848         }
1849         for (i = 0;i < vid.texunits;i++)
1850         {
1851                 R_Mesh_TexMatrix(i, &m->texmatrix[i]);
1852                 R_Mesh_TexCombine(i, m->texcombinergb[i], m->texcombinealpha[i], m->texrgbscale[i], m->texalphascale[i]);
1853         }
1854         CHECKGLERROR
1855 }
1856
1857 void R_Mesh_ResetTextureState(void)
1858 {
1859         unsigned int unitnum;
1860
1861         BACKENDACTIVECHECK
1862
1863         CHECKGLERROR
1864         switch(vid.renderpath)
1865         {
1866         case RENDERPATH_GL20:
1867                 for (unitnum = 0;unitnum < vid.teximageunits;unitnum++)
1868                 {
1869                         gltextureunit_t *unit = gl_state.units + unitnum;
1870                         if (unit->t2d)
1871                         {
1872                                 unit->t2d = 0;
1873                                 GL_ActiveTexture(unitnum);
1874                                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1875                         }
1876                         if (unit->t3d)
1877                         {
1878                                 unit->t3d = 0;
1879                                 GL_ActiveTexture(unitnum);
1880                                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1881                         }
1882                         if (unit->tcubemap)
1883                         {
1884                                 unit->tcubemap = 0;
1885                                 GL_ActiveTexture(unitnum);
1886                                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1887                         }
1888                         if (unit->trectangle)
1889                         {
1890                                 unit->trectangle = 0;
1891                                 GL_ActiveTexture(unitnum);
1892                                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1893                         }
1894                 }
1895                 for (unitnum = 0;unitnum < vid.texarrayunits;unitnum++)
1896                 {
1897                         gltextureunit_t *unit = gl_state.units + unitnum;
1898                         if (unit->arrayenabled)
1899                         {
1900                                 unit->arrayenabled = false;
1901                                 GL_ClientActiveTexture(unitnum);
1902                                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1903                         }
1904                 }
1905                 for (unitnum = 0;unitnum < vid.texunits;unitnum++)
1906                 {
1907                         gltextureunit_t *unit = gl_state.units + unitnum;
1908                         if (unit->texmatrixenabled)
1909                         {
1910                                 unit->texmatrixenabled = false;
1911                                 unit->matrix = identitymatrix;
1912                                 CHECKGLERROR
1913                                 GL_ActiveTexture(unitnum);
1914                                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1915                                 qglLoadIdentity();CHECKGLERROR
1916                                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1917                         }
1918                 }
1919                 break;
1920         case RENDERPATH_GL13:
1921         case RENDERPATH_GL11:
1922                 for (unitnum = 0;unitnum < vid.texunits;unitnum++)
1923                 {
1924                         gltextureunit_t *unit = gl_state.units + unitnum;
1925                         if (unit->t2d)
1926                         {
1927                                 unit->t2d = 0;
1928                                 GL_ActiveTexture(unitnum);
1929                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1930                                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1931                         }
1932                         if (unit->t3d)
1933                         {
1934                                 unit->t3d = 0;
1935                                 GL_ActiveTexture(unitnum);
1936                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1937                                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1938                         }
1939                         if (unit->tcubemap)
1940                         {
1941                                 unit->tcubemap = 0;
1942                                 GL_ActiveTexture(unitnum);
1943                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1944                                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1945                         }
1946                         if (unit->trectangle)
1947                         {
1948                                 unit->trectangle = 0;
1949                                 GL_ActiveTexture(unitnum);
1950                                 qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1951                                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1952                         }
1953                         if (unit->arrayenabled)
1954                         {
1955                                 unit->arrayenabled = false;
1956                                 GL_ClientActiveTexture(unitnum);
1957                                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1958                         }
1959                         if (unit->texmatrixenabled)
1960                         {
1961                                 unit->texmatrixenabled = false;
1962                                 unit->matrix = identitymatrix;
1963                                 CHECKGLERROR
1964                                 GL_ActiveTexture(unitnum);
1965                                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1966                                 qglLoadIdentity();CHECKGLERROR
1967                                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1968                         }
1969                         if (unit->combine != GL_MODULATE)
1970                         {
1971                                 unit->combine = GL_MODULATE;
1972                                 GL_ActiveTexture(unitnum);
1973                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1974                         }
1975                 }
1976                 break;
1977         }
1978 }