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_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)"};
  18 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"};
  19
  20 cvar_t v_flipped = {0, "v_flipped", "0", "mirror the screen (poor man's left handed mode)"};
  21 qboolean v_flipped_state = false;
  22
  23 r_viewport_t gl_viewport;
  24 matrix4x4_t gl_modelmatrix;
  25 matrix4x4_t gl_viewmatrix;
  26 matrix4x4_t gl_modelviewmatrix;
  27 matrix4x4_t gl_projectionmatrix;
  28 matrix4x4_t gl_modelviewprojectionmatrix;
  29 float gl_modelview16f[16];
  30 float gl_modelviewprojection16f[16];
  31 qboolean gl_modelmatrixchanged;
  32
  33 int gl_maxdrawrangeelementsvertices;
  34 int gl_maxdrawrangeelementsindices;
  35
  36 #ifdef DEBUGGL
  37 int errornumber = 0;
  38
  39 void GL_PrintError(int errornumber, char *filename, int linenumber)
  40 {
  41         switch(errornumber)
  42         {
  43 #ifdef GL_INVALID_ENUM
  44         case GL_INVALID_ENUM:
  45                 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
  46                 break;
  47 #endif
  48 #ifdef GL_INVALID_VALUE
  49         case GL_INVALID_VALUE:
  50                 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
  51                 break;
  52 #endif
  53 #ifdef GL_INVALID_OPERATION
  54         case GL_INVALID_OPERATION:
  55                 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
  56                 break;
  57 #endif
  58 #ifdef GL_STACK_OVERFLOW
  59         case GL_STACK_OVERFLOW:
  60                 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
  61                 break;
  62 #endif
  63 #ifdef GL_STACK_UNDERFLOW
  64         case GL_STACK_UNDERFLOW:
  65                 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
  66                 break;
  67 #endif
  68 #ifdef GL_OUT_OF_MEMORY
  69         case GL_OUT_OF_MEMORY:
  70                 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
  71                 break;
  72 #endif
  73 #ifdef GL_TABLE_TOO_LARGE
  74         case GL_TABLE_TOO_LARGE:
  75                 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
  76                 break;
  77 #endif
  78 #ifdef GL_INVALID_FRAMEBUFFER_OPERATION_EXT
  79         case GL_INVALID_FRAMEBUFFER_OPERATION_EXT:
  80                 Con_Printf("GL_INVALID_FRAMEBUFFER_OPERATION at %s:%i\n", filename, linenumber);
  81                 break;
  82 #endif
  83         default:
  84                 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
  85                 break;
  86         }
  87 }
  88 #endif
  89
  90 #define BACKENDACTIVECHECK if (!gl_state.active) Sys_Error("GL backend function called when backend is not active");
  91
  92 void SCR_ScreenShot_f (void);
  93
  94 typedef struct gl_bufferobjectinfo_s
  95 {
  96         int target;
  97         int object;
  98         size_t size;
  99         char name[MAX_QPATH];
 100 }
 101 gl_bufferobjectinfo_t;
 102
 103 typedef struct gltextureunit_s
 104 {
 105         const void *pointer_texcoord;
 106         size_t pointer_texcoord_offset;
 107         int pointer_texcoord_buffer;
 108         int t2d, t3d, tcubemap, trectangle;
 109         int arrayenabled;
 110         unsigned int arraycomponents;
 111         int rgbscale, alphascale;
 112         int combine;
 113         int combinergb, combinealpha;
 114         // texmatrixenabled exists only to avoid unnecessary texmatrix compares
 115         int texmatrixenabled;
 116         matrix4x4_t matrix;
 117 }
 118 gltextureunit_t;
 119
 120 typedef struct gl_state_s
 121 {
 122         int cullface;
 123         int cullfaceenable;
 124         int blendfunc1;
 125         int blendfunc2;
 126         int blend;
 127         GLboolean depthmask;
 128         int colormask; // stored as bottom 4 bits: r g b a (3 2 1 0 order)
 129         int depthtest;
 130         float depthrange[2];
 131         float polygonoffset[2];
 132         int alphatest;
 133         int scissortest;
 134         unsigned int unit;
 135         unsigned int clientunit;
 136         gltextureunit_t units[MAX_TEXTUREUNITS];
 137         float color4f[4];
 138         int lockrange_first;
 139         int lockrange_count;
 140         int vertexbufferobject;
 141         int elementbufferobject;
 142         qboolean pointer_color_enabled;
 143         const void *pointer_vertex;
 144         const void *pointer_color;
 145         size_t pointer_vertex_offset;
 146         size_t pointer_color_offset;
 147         int pointer_vertex_buffer;
 148         int pointer_color_buffer;
 149
 150         memexpandablearray_t bufferobjectinfoarray;
 151
 152         qboolean active;
 153 }
 154 gl_state_t;
 155
 156 static gl_state_t gl_state;
 157
 158
 159 /*
 160 note: here's strip order for a terrain row:
 161 0--1--2--3--4
 162 |\ |\ |\ |\ |
 163 | \| \| \| \|
 164 A--B--C--D--E
 165 clockwise
 166
 167 A0B, 01B, B1C, 12C, C2D, 23D, D3E, 34E
 168
 169 *elements++ = i + row;
 170 *elements++ = i;
 171 *elements++ = i + row + 1;
 172 *elements++ = i;
 173 *elements++ = i + 1;
 174 *elements++ = i + row + 1;
 175
 176
 177 for (y = 0;y < rows - 1;y++)
 178 {
 179         for (x = 0;x < columns - 1;x++)
 180         {
 181                 i = y * rows + x;
 182                 *elements++ = i + columns;
 183                 *elements++ = i;
 184                 *elements++ = i + columns + 1;
 185                 *elements++ = i;
 186                 *elements++ = i + 1;
 187                 *elements++ = i + columns + 1;
 188         }
 189 }
 190
 191 alternative:
 192 0--1--2--3--4
 193 | /| /|\ | /|
 194 |/ |/ | \|/ |
 195 A--B--C--D--E
 196 counterclockwise
 197
 198 for (y = 0;y < rows - 1;y++)
 199 {
 200         for (x = 0;x < columns - 1;x++)
 201         {
 202                 i = y * rows + x;
 203                 *elements++ = i;
 204                 *elements++ = i + columns;
 205                 *elements++ = i + columns + 1;
 206                 *elements++ = i + columns;
 207                 *elements++ = i + columns + 1;
 208                 *elements++ = i + 1;
 209         }
 210 }
 211 */
 212
 213 int polygonelement3i[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 214 unsigned short polygonelement3s[(POLYGONELEMENTS_MAXPOINTS-2)*3];
 215 int quadelement3i[QUADELEMENTS_MAXQUADS*6];
 216 unsigned short quadelement3s[QUADELEMENTS_MAXQUADS*6];
 217
 218 void GL_VBOStats_f(void)
 219 {
 220         GL_Mesh_ListVBOs(true);
 221 }
 222
 223 static void GL_Backend_ResetState(void);
 224
 225 static void gl_backend_start(void)
 226 {
 227         memset(&gl_state, 0, sizeof(gl_state));
 228
 229         Mem_ExpandableArray_NewArray(&gl_state.bufferobjectinfoarray, r_main_mempool, sizeof(gl_bufferobjectinfo_t), 128);
 230
 231         Con_DPrintf("OpenGL backend started.\n");
 232
 233         CHECKGLERROR
 234
 235         GL_Backend_ResetState();
 236 }
 237
 238 static void gl_backend_shutdown(void)
 239 {
 240         Con_DPrint("OpenGL Backend shutting down\n");
 241
 242         Mem_ExpandableArray_FreeArray(&gl_state.bufferobjectinfoarray);
 243
 244         memset(&gl_state, 0, sizeof(gl_state));
 245 }
 246
 247 static void gl_backend_newmap(void)
 248 {
 249 }
 250
 251 void gl_backend_init(void)
 252 {
 253         int i;
 254
 255         for (i = 0;i < POLYGONELEMENTS_MAXPOINTS - 2;i++)
 256         {
 257                 polygonelement3s[i * 3 + 0] = 0;
 258                 polygonelement3s[i * 3 + 1] = i + 1;
 259                 polygonelement3s[i * 3 + 2] = i + 2;
 260         }
 261         // elements for rendering a series of quads as triangles
 262         for (i = 0;i < QUADELEMENTS_MAXQUADS;i++)
 263         {
 264                 quadelement3s[i * 6 + 0] = i * 4;
 265                 quadelement3s[i * 6 + 1] = i * 4 + 1;
 266                 quadelement3s[i * 6 + 2] = i * 4 + 2;
 267                 quadelement3s[i * 6 + 3] = i * 4;
 268                 quadelement3s[i * 6 + 4] = i * 4 + 2;
 269                 quadelement3s[i * 6 + 5] = i * 4 + 3;
 270         }
 271
 272         for (i = 0;i < (POLYGONELEMENTS_MAXPOINTS - 2)*3;i++)
 273                 polygonelement3i[i] = polygonelement3s[i];
 274         for (i = 0;i < QUADELEMENTS_MAXQUADS*3;i++)
 275                 quadelement3i[i] = quadelement3s[i];
 276
 277         Cvar_RegisterVariable(&r_render);
 278         Cvar_RegisterVariable(&r_renderview);
 279         Cvar_RegisterVariable(&r_waterwarp);
 280         Cvar_RegisterVariable(&gl_polyblend);
 281         Cvar_RegisterVariable(&v_flipped);
 282         Cvar_RegisterVariable(&gl_dither);
 283         Cvar_RegisterVariable(&gl_vbo);
 284         Cvar_RegisterVariable(&gl_paranoid);
 285         Cvar_RegisterVariable(&gl_printcheckerror);
 286
 287         Cvar_RegisterVariable(&gl_mesh_drawrangeelements);
 288         Cvar_RegisterVariable(&gl_mesh_testarrayelement);
 289         Cvar_RegisterVariable(&gl_mesh_testmanualfeeding);
 290         Cvar_RegisterVariable(&gl_mesh_prefer_short_elements);
 291
 292         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");
 293
 294         R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
 295 }
 296
 297 void GL_SetMirrorState(qboolean state);
 298
 299 void R_Viewport_TransformToScreen(const r_viewport_t *v, const vec4_t in, vec4_t out)
 300 {
 301         vec4_t temp;
 302         float iw;
 303         Matrix4x4_Transform4 (&v->viewmatrix, in, temp);
 304         Matrix4x4_Transform4 (&v->projectmatrix, temp, out);
 305         iw = 1.0f / out[3];
 306         out[0] = v->x + (out[0] * iw + 1.0f) * v->width * 0.5f;
 307         out[1] = v->y + v->height - (out[1] * iw + 1.0f) * v->height * 0.5f;
 308         out[2] = v->z + (out[2] * iw + 1.0f) * v->depth * 0.5f;
 309 }
 310
 311 static void R_Viewport_ApplyNearClipPlaneFloatGL(const r_viewport_t *v, float *m, float normalx, float normaly, float normalz, float dist)
 312 {
 313         float q[4];
 314         float d;
 315         float clipPlane[4], v3[3], v4[3];
 316         float normal[3];
 317
 318         // This is inspired by Oblique Depth Projection from http://www.terathon.com/code/oblique.php
 319
 320         VectorSet(normal, normalx, normaly, normalz);
 321         Matrix4x4_Transform3x3(&v->viewmatrix, normal, clipPlane);
 322         VectorScale(normal, dist, v3);
 323         Matrix4x4_Transform(&v->viewmatrix, v3, v4);
 324         // FIXME: LordHavoc: I think this can be done more efficiently somehow but I can't remember the technique
 325         clipPlane[3] = -DotProduct(v4, clipPlane);
 326
 327 #if 0
 328 {
 329         // testing code for comparing results
 330         float clipPlane2[4];
 331         VectorCopy4(clipPlane, clipPlane2);
 332         R_EntityMatrix(&identitymatrix);
 333         VectorSet(q, normal[0], normal[1], normal[2], -dist);
 334         qglClipPlane(GL_CLIP_PLANE0, q);
 335         qglGetClipPlane(GL_CLIP_PLANE0, q);
 336         VectorCopy4(q, clipPlane);
 337 }
 338 #endif
 339
 340         // Calculate the clip-space corner point opposite the clipping plane
 341         // as (sgn(clipPlane.x), sgn(clipPlane.y), 1, 1) and
 342         // transform it into camera space by multiplying it
 343         // by the inverse of the projection matrix
 344         q[0] = ((clipPlane[0] < 0.0f ? -1.0f : clipPlane[0] > 0.0f ? 1.0f : 0.0f) + m[8]) / m[0];
 345         q[1] = ((clipPlane[1] < 0.0f ? -1.0f : clipPlane[1] > 0.0f ? 1.0f : 0.0f) + m[9]) / m[5];
 346         q[2] = -1.0f;
 347         q[3] = (1.0f + m[10]) / m[14];
 348
 349         // Calculate the scaled plane vector
 350         d = 2.0f / DotProduct4(clipPlane, q);
 351
 352         // Replace the third row of the projection matrix
 353         m[2] = clipPlane[0] * d;
 354         m[6] = clipPlane[1] * d;
 355         m[10] = clipPlane[2] * d + 1.0f;
 356         m[14] = clipPlane[3] * d;
 357 }
 358
 359 void R_Viewport_InitOrtho(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float x1, float y1, float x2, float y2, float nearclip, float farclip, const float *nearplane)
 360 {
 361         float left = x1, right = x2, bottom = y2, top = y1, zNear = nearclip, zFar = farclip;
 362         float m[16];
 363         memset(v, 0, sizeof(*v));
 364         v->type = R_VIEWPORTTYPE_ORTHO;
 365         v->cameramatrix = *cameramatrix;
 366         v->x = x;
 367         v->y = y;
 368         v->z = 0;
 369         v->width = width;
 370         v->height = height;
 371         v->depth = 1;
 372         memset(m, 0, sizeof(m));
 373         m[0]  = 2/(right - left);
 374         m[5]  = 2/(top - bottom);
 375         m[10] = -2/(zFar - zNear);
 376         m[12] = - (right + left)/(right - left);
 377         m[13] = - (top + bottom)/(top - bottom);
 378         m[14] = - (zFar + zNear)/(zFar - zNear);
 379         m[15] = 1;
 380         v->screentodepth[0] = -farclip / (farclip - nearclip);
 381         v->screentodepth[1] = farclip * nearclip / (farclip - nearclip);
 382
 383         Matrix4x4_Invert_Full(&v->viewmatrix, &v->cameramatrix);
 384
 385         if (nearplane)
 386                 R_Viewport_ApplyNearClipPlaneFloatGL(v, m, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 387
 388         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, m);
 389
 390 #if 0
 391         {
 392                 vec4_t test1;
 393                 vec4_t test2;
 394                 Vector4Set(test1, (x1+x2)*0.5f, (y1+y2)*0.5f, 0.0f, 1.0f);
 395                 R_Viewport_TransformToScreen(v, test1, test2);
 396                 Con_Printf("%f %f %f -> %f %f %f\n", test1[0], test1[1], test1[2], test2[0], test2[1], test2[2]);
 397         }
 398 #endif
 399 }
 400
 401 void R_Viewport_InitPerspective(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float frustumx, float frustumy, float nearclip, float farclip, const float *nearplane)
 402 {
 403         matrix4x4_t tempmatrix, basematrix;
 404         float m[16];
 405         memset(v, 0, sizeof(*v));
 406
 407         if(v_flipped.integer)
 408                 frustumx = -frustumx;
 409
 410         v->type = R_VIEWPORTTYPE_PERSPECTIVE;
 411         v->cameramatrix = *cameramatrix;
 412         v->x = x;
 413         v->y = y;
 414         v->z = 0;
 415         v->width = width;
 416         v->height = height;
 417         v->depth = 1;
 418         memset(m, 0, sizeof(m));
 419         m[0]  = 1.0 / frustumx;
 420         m[5]  = 1.0 / frustumy;
 421         m[10] = -(farclip + nearclip) / (farclip - nearclip);
 422         m[11] = -1;
 423         m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 424         v->screentodepth[0] = -farclip / (farclip - nearclip);
 425         v->screentodepth[1] = farclip * nearclip / (farclip - nearclip);
 426
 427         Matrix4x4_Invert_Full(&tempmatrix, &v->cameramatrix);
 428         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 429         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 430         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 431
 432         if (nearplane)
 433                 R_Viewport_ApplyNearClipPlaneFloatGL(v, m, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 434
 435         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, m);
 436 }
 437
 438 void R_Viewport_InitPerspectiveInfinite(r_viewport_t *v, const matrix4x4_t *cameramatrix, int x, int y, int width, int height, float frustumx, float frustumy, float nearclip, const float *nearplane)
 439 {
 440         matrix4x4_t tempmatrix, basematrix;
 441         const float nudge = 1.0 - 1.0 / (1<<23);
 442         float m[16];
 443         memset(v, 0, sizeof(*v));
 444
 445         if(v_flipped.integer)
 446                 frustumx = -frustumx;
 447
 448         v->type = R_VIEWPORTTYPE_PERSPECTIVE_INFINITEFARCLIP;
 449         v->cameramatrix = *cameramatrix;
 450         v->x = x;
 451         v->y = y;
 452         v->z = 0;
 453         v->width = width;
 454         v->height = height;
 455         v->depth = 1;
 456         memset(m, 0, sizeof(m));
 457         m[ 0] = 1.0 / frustumx;
 458         m[ 5] = 1.0 / frustumy;
 459         m[10] = -nudge;
 460         m[11] = -1;
 461         m[14] = -2 * nearclip * nudge;
 462         v->screentodepth[0] = (m[10] + 1) * 0.5 - 1;
 463         v->screentodepth[1] = m[14] * -0.5;
 464
 465         Matrix4x4_Invert_Full(&tempmatrix, &v->cameramatrix);
 466         Matrix4x4_CreateRotate(&basematrix, -90, 1, 0, 0);
 467         Matrix4x4_ConcatRotate(&basematrix, 90, 0, 0, 1);
 468         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 469
 470         if (nearplane)
 471                 R_Viewport_ApplyNearClipPlaneFloatGL(v, m, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 472
 473         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, m);
 474 }
 475
 476 float cubeviewmatrix[6][16] =
 477 {
 478     // standard cubemap projections
 479     { // +X
 480          0, 0,-1, 0,
 481          0,-1, 0, 0,
 482         -1, 0, 0, 0,
 483          0, 0, 0, 1,
 484     },
 485     { // -X
 486          0, 0, 1, 0,
 487          0,-1, 0, 0,
 488          1, 0, 0, 0,
 489          0, 0, 0, 1,
 490     },
 491     { // +Y
 492          1, 0, 0, 0,
 493          0, 0,-1, 0,
 494          0, 1, 0, 0,
 495          0, 0, 0, 1,
 496     },
 497     { // -Y
 498          1, 0, 0, 0,
 499          0, 0, 1, 0,
 500          0,-1, 0, 0,
 501          0, 0, 0, 1,
 502     },
 503     { // +Z
 504          1, 0, 0, 0,
 505          0,-1, 0, 0,
 506          0, 0,-1, 0,
 507          0, 0, 0, 1,
 508     },
 509     { // -Z
 510         -1, 0, 0, 0,
 511          0,-1, 0, 0,
 512          0, 0, 1, 0,
 513          0, 0, 0, 1,
 514     },
 515 };
 516 float rectviewmatrix[6][16] =
 517 {
 518     // sign-preserving cubemap projections
 519     { // +X
 520          0, 0,-1, 0,
 521          0, 1, 0, 0,
 522          1, 0, 0, 0,
 523          0, 0, 0, 1,
 524     },
 525     { // -X
 526          0, 0, 1, 0,
 527          0, 1, 0, 0,
 528          1, 0, 0, 0,
 529          0, 0, 0, 1,
 530     },
 531     { // +Y
 532          1, 0, 0, 0,
 533          0, 0,-1, 0,
 534          0, 1, 0, 0,
 535          0, 0, 0, 1,
 536     },
 537     { // -Y
 538          1, 0, 0, 0,
 539          0, 0, 1, 0,
 540          0, 1, 0, 0,
 541          0, 0, 0, 1,
 542     },
 543     { // +Z
 544          1, 0, 0, 0,
 545          0, 1, 0, 0,
 546          0, 0,-1, 0,
 547          0, 0, 0, 1,
 548     },
 549     { // -Z
 550          1, 0, 0, 0,
 551          0, 1, 0, 0,
 552          0, 0, 1, 0,
 553          0, 0, 0, 1,
 554     },
 555 };
 556
 557 void R_Viewport_InitCubeSideView(r_viewport_t *v, const matrix4x4_t *cameramatrix, int side, int size, float nearclip, float farclip, const float *nearplane)
 558 {
 559         matrix4x4_t tempmatrix, basematrix;
 560         float m[16];
 561         memset(v, 0, sizeof(*v));
 562         v->type = R_VIEWPORTTYPE_PERSPECTIVECUBESIDE;
 563         v->cameramatrix = *cameramatrix;
 564         v->width = size;
 565         v->height = size;
 566         v->depth = 1;
 567         memset(m, 0, sizeof(m));
 568         m[0] = m[5] = 1.0f;
 569         m[10] = -(farclip + nearclip) / (farclip - nearclip);
 570         m[11] = -1;
 571         m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 572
 573         Matrix4x4_FromArrayFloatGL(&basematrix, cubeviewmatrix[side]);
 574         Matrix4x4_Invert_Simple(&tempmatrix, &v->cameramatrix);
 575         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 576
 577         if (nearplane)
 578                 R_Viewport_ApplyNearClipPlaneFloatGL(v, m, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 579
 580         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, m);
 581 }
 582
 583 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)
 584 {
 585         matrix4x4_t tempmatrix, basematrix;
 586         float m[16];
 587         memset(v, 0, sizeof(*v));
 588         v->type = R_VIEWPORTTYPE_PERSPECTIVECUBESIDE;
 589         v->cameramatrix = *cameramatrix;
 590         v->x = (side & 1) * size;
 591         v->y = (side >> 1) * size;
 592         v->width = size;
 593         v->height = size;
 594         v->depth = 1;
 595         memset(m, 0, sizeof(m));
 596         m[0] = m[5] = 1.0f * ((float)size - border) / size;
 597         m[10] = -(farclip + nearclip) / (farclip - nearclip);
 598         m[11] = -1;
 599         m[14] = -2 * nearclip * farclip / (farclip - nearclip);
 600
 601         Matrix4x4_FromArrayFloatGL(&basematrix, rectviewmatrix[side]);
 602         Matrix4x4_Invert_Simple(&tempmatrix, &v->cameramatrix);
 603         Matrix4x4_Concat(&v->viewmatrix, &basematrix, &tempmatrix);
 604
 605         if (nearplane)
 606                 R_Viewport_ApplyNearClipPlaneFloatGL(v, m, nearplane[0], nearplane[1], nearplane[2], nearplane[3]);
 607
 608         Matrix4x4_FromArrayFloatGL(&v->projectmatrix, m);
 609 }
 610
 611 void R_SetViewport(const r_viewport_t *v)
 612 {
 613         float m[16];
 614         gl_viewport = *v;
 615
 616         CHECKGLERROR
 617         qglViewport(v->x, v->y, v->width, v->height);CHECKGLERROR
 618
 619         // FIXME: v_flipped_state is evil, this probably breaks somewhere
 620         GL_SetMirrorState(v_flipped.integer && (v->type == R_VIEWPORTTYPE_PERSPECTIVE || v->type == R_VIEWPORTTYPE_PERSPECTIVE_INFINITEFARCLIP));
 621
 622         // copy over the matrices to our state
 623         gl_viewmatrix = v->viewmatrix;
 624         gl_projectionmatrix = v->projectmatrix;
 625
 626         switch(vid.renderpath)
 627         {
 628         case RENDERPATH_GL20:
 629         case RENDERPATH_CGGL:
 630 //              break;
 631         case RENDERPATH_GL13:
 632         case RENDERPATH_GL11:
 633                 // Load the projection matrix into OpenGL
 634                 qglMatrixMode(GL_PROJECTION);CHECKGLERROR
 635                 Matrix4x4_ToArrayFloatGL(&gl_projectionmatrix, m);
 636                 qglLoadMatrixf(m);CHECKGLERROR
 637                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 638                 break;
 639         }
 640
 641         // force an update of the derived matrices
 642         gl_modelmatrixchanged = true;
 643         R_EntityMatrix(&gl_modelmatrix);
 644 }
 645
 646 void R_GetViewport(r_viewport_t *v)
 647 {
 648         *v = gl_viewport;
 649 }
 650
 651 static void GL_BindVBO(int bufferobject)
 652 {
 653         if (gl_state.vertexbufferobject != bufferobject)
 654         {
 655                 gl_state.vertexbufferobject = bufferobject;
 656                 CHECKGLERROR
 657                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, bufferobject);
 658                 CHECKGLERROR
 659         }
 660 }
 661
 662 static void GL_BindEBO(int bufferobject)
 663 {
 664         if (gl_state.elementbufferobject != bufferobject)
 665         {
 666                 gl_state.elementbufferobject = bufferobject;
 667                 CHECKGLERROR
 668                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, bufferobject);
 669                 CHECKGLERROR
 670         }
 671 }
 672
 673 static void GL_Backend_ResetState(void)
 674 {
 675         unsigned int i;
 676         gl_state.active = true;
 677         gl_state.depthtest = true;
 678         gl_state.alphatest = false;
 679         gl_state.blendfunc1 = GL_ONE;
 680         gl_state.blendfunc2 = GL_ZERO;
 681         gl_state.blend = false;
 682         gl_state.depthmask = GL_TRUE;
 683         gl_state.colormask = 15;
 684         gl_state.color4f[0] = gl_state.color4f[1] = gl_state.color4f[2] = gl_state.color4f[3] = 1;
 685         gl_state.lockrange_first = 0;
 686         gl_state.lockrange_count = 0;
 687         gl_state.cullface = v_flipped_state ? GL_BACK : GL_FRONT; // quake is backwards, this culls back faces
 688         gl_state.cullfaceenable = true;
 689         gl_state.polygonoffset[0] = 0;
 690         gl_state.polygonoffset[1] = 0;
 691
 692         CHECKGLERROR
 693
 694         qglColorMask(1, 1, 1, 1);
 695         qglAlphaFunc(GL_GEQUAL, 0.5);CHECKGLERROR
 696         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 697         qglBlendFunc(gl_state.blendfunc1, gl_state.blendfunc2);CHECKGLERROR
 698         qglDisable(GL_BLEND);CHECKGLERROR
 699         qglCullFace(gl_state.cullface);CHECKGLERROR
 700         qglEnable(GL_CULL_FACE);CHECKGLERROR
 701         qglDepthFunc(GL_LEQUAL);CHECKGLERROR
 702         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 703         qglDepthMask(gl_state.depthmask);CHECKGLERROR
 704         qglPolygonOffset(gl_state.polygonoffset[0], gl_state.polygonoffset[1]);
 705
 706         if (vid.support.arb_vertex_buffer_object)
 707         {
 708                 qglBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
 709                 qglBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
 710         }
 711
 712         if (vid.support.ext_framebuffer_object)
 713         {
 714                 qglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
 715                 qglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
 716         }
 717
 718         qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), NULL);CHECKGLERROR
 719         qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
 720
 721         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), NULL);CHECKGLERROR
 722         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
 723
 724         GL_Color(0, 0, 0, 0);
 725         GL_Color(1, 1, 1, 1);
 726
 727         gl_state.unit = MAX_TEXTUREUNITS;
 728         gl_state.clientunit = MAX_TEXTUREUNITS;
 729         for (i = 0;i < vid.teximageunits;i++)
 730         {
 731                 GL_ActiveTexture(i);
 732                 qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
 733                 if (vid.support.ext_texture_3d)
 734                 {
 735                         qglBindTexture(GL_TEXTURE_3D, 0);CHECKGLERROR
 736                 }
 737                 if (vid.support.arb_texture_cube_map)
 738                 {
 739                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, 0);CHECKGLERROR
 740                 }
 741                 if (vid.support.arb_texture_rectangle)
 742                 {
 743                         qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);CHECKGLERROR
 744                 }
 745         }
 746
 747         for (i = 0;i < vid.texarrayunits;i++)
 748         {
 749                 GL_ClientActiveTexture(i);
 750                 GL_BindVBO(0);
 751                 qglTexCoordPointer(2, GL_FLOAT, sizeof(float[2]), NULL);CHECKGLERROR
 752                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
 753         }
 754
 755         for (i = 0;i < vid.texunits;i++)
 756         {
 757                 GL_ActiveTexture(i);
 758                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
 759                 if (vid.support.ext_texture_3d)
 760                 {
 761                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
 762                 }
 763                 if (vid.support.arb_texture_cube_map)
 764                 {
 765                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
 766                 }
 767                 if (vid.support.arb_texture_rectangle)
 768                 {
 769                         qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
 770                 }
 771                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
 772                 qglLoadIdentity();CHECKGLERROR
 773                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
 774                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
 775                 CHECKGLERROR
 776         }
 777         CHECKGLERROR
 778 }
 779
 780 void GL_ActiveTexture(unsigned int num)
 781 {
 782         if (gl_state.unit != num)
 783         {
 784                 gl_state.unit = num;
 785                 if (qglActiveTexture)
 786                 {
 787                         CHECKGLERROR
 788                         qglActiveTexture(GL_TEXTURE0_ARB + gl_state.unit);
 789                         CHECKGLERROR
 790                 }
 791         }
 792 }
 793
 794 void GL_ClientActiveTexture(unsigned int num)
 795 {
 796         if (gl_state.clientunit != num)
 797         {
 798                 gl_state.clientunit = num;
 799                 if (qglActiveTexture)
 800                 {
 801                         CHECKGLERROR
 802                         qglClientActiveTexture(GL_TEXTURE0_ARB + gl_state.clientunit);
 803                         CHECKGLERROR
 804                 }
 805         }
 806 }
 807
 808 void GL_BlendFunc(int blendfunc1, int blendfunc2)
 809 {
 810         if (gl_state.blendfunc1 != blendfunc1 || gl_state.blendfunc2 != blendfunc2)
 811         {
 812                 CHECKGLERROR
 813                 qglBlendFunc(gl_state.blendfunc1 = blendfunc1, gl_state.blendfunc2 = blendfunc2);CHECKGLERROR
 814                 if (gl_state.blendfunc2 == GL_ZERO)
 815                 {
 816                         if (gl_state.blendfunc1 == GL_ONE)
 817                         {
 818                                 if (gl_state.blend)
 819                                 {
 820                                         gl_state.blend = 0;
 821                                         qglDisable(GL_BLEND);CHECKGLERROR
 822                                 }
 823                         }
 824                         else
 825                         {
 826                                 if (!gl_state.blend)
 827                                 {
 828                                         gl_state.blend = 1;
 829                                         qglEnable(GL_BLEND);CHECKGLERROR
 830                                 }
 831                         }
 832                 }
 833                 else
 834                 {
 835                         if (!gl_state.blend)
 836                         {
 837                                 gl_state.blend = 1;
 838                                 qglEnable(GL_BLEND);CHECKGLERROR
 839                         }
 840                 }
 841         }
 842 }
 843
 844 void GL_DepthMask(int state)
 845 {
 846         if (gl_state.depthmask != state)
 847         {
 848                 CHECKGLERROR
 849                 qglDepthMask(gl_state.depthmask = state);CHECKGLERROR
 850         }
 851 }
 852
 853 void GL_DepthTest(int state)
 854 {
 855         if (gl_state.depthtest != state)
 856         {
 857                 gl_state.depthtest = state;
 858                 CHECKGLERROR
 859                 if (gl_state.depthtest)
 860                 {
 861                         qglEnable(GL_DEPTH_TEST);CHECKGLERROR
 862                 }
 863                 else
 864                 {
 865                         qglDisable(GL_DEPTH_TEST);CHECKGLERROR
 866                 }
 867         }
 868 }
 869
 870 void GL_DepthRange(float nearfrac, float farfrac)
 871 {
 872         if (gl_state.depthrange[0] != nearfrac || gl_state.depthrange[1] != farfrac)
 873         {
 874                 gl_state.depthrange[0] = nearfrac;
 875                 gl_state.depthrange[1] = farfrac;
 876                 qglDepthRange(nearfrac, farfrac);
 877         }
 878 }
 879
 880 void GL_PolygonOffset(float planeoffset, float depthoffset)
 881 {
 882         if (gl_state.polygonoffset[0] != planeoffset || gl_state.polygonoffset[1] != depthoffset)
 883         {
 884                 gl_state.polygonoffset[0] = planeoffset;
 885                 gl_state.polygonoffset[1] = depthoffset;
 886                 qglPolygonOffset(planeoffset, depthoffset);
 887         }
 888 }
 889
 890 void GL_SetMirrorState(qboolean state)
 891 {
 892         if(!state != !v_flipped_state)
 893         {
 894                 // change cull face mode!
 895                 if(gl_state.cullface == GL_BACK)
 896                         qglCullFace((gl_state.cullface = GL_FRONT));
 897                 else if(gl_state.cullface == GL_FRONT)
 898                         qglCullFace((gl_state.cullface = GL_BACK));
 899         }
 900         v_flipped_state = state;
 901 }
 902
 903 void GL_CullFace(int state)
 904 {
 905         CHECKGLERROR
 906
 907         if(v_flipped_state)
 908         {
 909                 if(state == GL_FRONT)
 910                         state = GL_BACK;
 911                 else if(state == GL_BACK)
 912                         state = GL_FRONT;
 913         }
 914
 915         if (state != GL_NONE)
 916         {
 917                 if (!gl_state.cullfaceenable)
 918                 {
 919                         gl_state.cullfaceenable = true;
 920                         qglEnable(GL_CULL_FACE);CHECKGLERROR
 921                 }
 922                 if (gl_state.cullface != state)
 923                 {
 924                         gl_state.cullface = state;
 925                         qglCullFace(gl_state.cullface);CHECKGLERROR
 926                 }
 927         }
 928         else
 929         {
 930                 if (gl_state.cullfaceenable)
 931                 {
 932                         gl_state.cullfaceenable = false;
 933                         qglDisable(GL_CULL_FACE);CHECKGLERROR
 934                 }
 935         }
 936 }
 937
 938 void GL_AlphaTest(int state)
 939 {
 940         if (gl_state.alphatest != state)
 941         {
 942                 gl_state.alphatest = state;
 943                 CHECKGLERROR
 944                 if (gl_state.alphatest)
 945                 {
 946                         qglEnable(GL_ALPHA_TEST);CHECKGLERROR
 947                 }
 948                 else
 949                 {
 950                         qglDisable(GL_ALPHA_TEST);CHECKGLERROR
 951                 }
 952         }
 953 }
 954
 955 void GL_ColorMask(int r, int g, int b, int a)
 956 {
 957         int state = r*8 + g*4 + b*2 + a*1;
 958         if (gl_state.colormask != state)
 959         {
 960                 gl_state.colormask = state;
 961                 CHECKGLERROR
 962                 qglColorMask((GLboolean)r, (GLboolean)g, (GLboolean)b, (GLboolean)a);CHECKGLERROR
 963         }
 964 }
 965
 966 void GL_Color(float cr, float cg, float cb, float ca)
 967 {
 968         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)
 969         {
 970                 gl_state.color4f[0] = cr;
 971                 gl_state.color4f[1] = cg;
 972                 gl_state.color4f[2] = cb;
 973                 gl_state.color4f[3] = ca;
 974                 CHECKGLERROR
 975                 qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);
 976                 CHECKGLERROR
 977         }
 978 }
 979
 980 void GL_Scissor (int x, int y, int width, int height)
 981 {
 982         CHECKGLERROR
 983         qglScissor(x, y,width,height);
 984         CHECKGLERROR
 985 }
 986
 987 void GL_ScissorTest(int state)
 988 {
 989         if(gl_state.scissortest == state)
 990                 return;
 991
 992         CHECKGLERROR
 993         if((gl_state.scissortest = state))
 994                 qglEnable(GL_SCISSOR_TEST);
 995         else
 996                 qglDisable(GL_SCISSOR_TEST);
 997         CHECKGLERROR
 998 }
 999
1000 void GL_Clear(int mask)
1001 {
1002         CHECKGLERROR
1003         qglClear(mask);CHECKGLERROR
1004 }
1005
1006 // called at beginning of frame
1007 void R_Mesh_Start(void)
1008 {
1009         BACKENDACTIVECHECK
1010         CHECKGLERROR
1011         if (gl_printcheckerror.integer && !gl_paranoid.integer)
1012         {
1013                 Con_Printf("WARNING: gl_printcheckerror is on but gl_paranoid is off, turning it on...\n");
1014                 Cvar_SetValueQuick(&gl_paranoid, 1);
1015         }
1016 }
1017
1018 qboolean GL_Backend_CompileShader(int programobject, GLenum shadertypeenum, const char *shadertype, int numstrings, const char **strings)
1019 {
1020         int shaderobject;
1021         int shadercompiled;
1022         char compilelog[MAX_INPUTLINE];
1023         shaderobject = qglCreateShaderObjectARB(shadertypeenum);CHECKGLERROR
1024         if (!shaderobject)
1025                 return false;
1026         qglShaderSourceARB(shaderobject, numstrings, strings, NULL);CHECKGLERROR
1027         qglCompileShaderARB(shaderobject);CHECKGLERROR
1028         qglGetObjectParameterivARB(shaderobject, GL_OBJECT_COMPILE_STATUS_ARB, &shadercompiled);CHECKGLERROR
1029         qglGetInfoLogARB(shaderobject, sizeof(compilelog), NULL, compilelog);CHECKGLERROR
1030         if (compilelog[0] && (strstr(compilelog, "error") || strstr(compilelog, "ERROR") || strstr(compilelog, "Error") || strstr(compilelog, "WARNING") || strstr(compilelog, "warning") || strstr(compilelog, "Warning")))
1031         {
1032                 int i, j, pretextlines = 0;
1033                 for (i = 0;i < numstrings - 1;i++)
1034                         for (j = 0;strings[i][j];j++)
1035                                 if (strings[i][j] == '\n')
1036                                         pretextlines++;
1037                 Con_Printf("%s shader compile log:\n%s\n(line offset for any above warnings/errors: %i)\n", shadertype, compilelog, pretextlines);
1038         }
1039         if (!shadercompiled)
1040         {
1041                 qglDeleteObjectARB(shaderobject);CHECKGLERROR
1042                 return false;
1043         }
1044         qglAttachObjectARB(programobject, shaderobject);CHECKGLERROR
1045         qglDeleteObjectARB(shaderobject);CHECKGLERROR
1046         return true;
1047 }
1048
1049 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)
1050 {
1051         GLint programlinked;
1052         GLuint programobject = 0;
1053         char linklog[MAX_INPUTLINE];
1054         CHECKGLERROR
1055
1056         programobject = qglCreateProgramObjectARB();CHECKGLERROR
1057         if (!programobject)
1058                 return 0;
1059
1060         if (vertexstrings_count && !GL_Backend_CompileShader(programobject, GL_VERTEX_SHADER_ARB, "vertex", vertexstrings_count, vertexstrings_list))
1061                 goto cleanup;
1062
1063 #ifdef GL_GEOMETRY_SHADER_ARB
1064         if (geometrystrings_count && !GL_Backend_CompileShader(programobject, GL_GEOMETRY_SHADER_ARB, "geometry", geometrystrings_count, geometrystrings_list))
1065                 goto cleanup;
1066 #endif
1067
1068         if (fragmentstrings_count && !GL_Backend_CompileShader(programobject, GL_FRAGMENT_SHADER_ARB, "fragment", fragmentstrings_count, fragmentstrings_list))
1069                 goto cleanup;
1070
1071         qglLinkProgramARB(programobject);CHECKGLERROR
1072         qglGetObjectParameterivARB(programobject, GL_OBJECT_LINK_STATUS_ARB, &programlinked);CHECKGLERROR
1073         qglGetInfoLogARB(programobject, sizeof(linklog), NULL, linklog);CHECKGLERROR
1074         if (linklog[0])
1075         {
1076                 if (strstr(linklog, "error") || strstr(linklog, "ERROR") || strstr(linklog, "Error") || strstr(linklog, "WARNING") || strstr(linklog, "warning") || strstr(linklog, "Warning"))
1077                         Con_DPrintf("program link log:\n%s\n", linklog);
1078                 // software vertex shader is ok but software fragment shader is WAY
1079                 // too slow, fail program if so.
1080                 // NOTE: this string might be ATI specific, but that's ok because the
1081                 // ATI R300 chip (Radeon 9500-9800/X300) is the most likely to use a
1082                 // software fragment shader due to low instruction and dependent
1083                 // texture limits.
1084                 if (strstr(linklog, "fragment shader will run in software"))
1085                         programlinked = false;
1086         }
1087         if (!programlinked)
1088                 goto cleanup;
1089         return programobject;
1090 cleanup:
1091         qglDeleteObjectARB(programobject);CHECKGLERROR
1092         return 0;
1093 }
1094
1095 void GL_Backend_FreeProgram(unsigned int prog)
1096 {
1097         CHECKGLERROR
1098         qglDeleteObjectARB(prog);
1099         CHECKGLERROR
1100 }
1101
1102 void GL_Backend_RenumberElements(int *out, int count, const int *in, int offset)
1103 {
1104         int i;
1105         if (offset)
1106         {
1107                 for (i = 0;i < count;i++)
1108                         *out++ = *in++ + offset;
1109         }
1110         else
1111                 memcpy(out, in, sizeof(*out) * count);
1112 }
1113
1114 // renders triangles using vertices from the active arrays
1115 int paranoidblah = 0;
1116 void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtriangles, const int *element3i, const unsigned short *element3s, int bufferobject3i, int bufferobject3s)
1117 {
1118         unsigned int numelements = numtriangles * 3;
1119         if (numvertices < 3 || numtriangles < 1)
1120         {
1121                 if (numvertices < 0 || numtriangles < 0 || developer_extra.integer)
1122                         Con_DPrintf("R_Mesh_Draw(%d, %d, %d, %d, %8p, %8p, %i, %i);\n", firstvertex, numvertices, firsttriangle, numtriangles, (void *)element3i, (void *)element3s, bufferobject3i, bufferobject3s);
1123                 return;
1124         }
1125         if (!gl_mesh_prefer_short_elements.integer)
1126         {
1127                 if (element3i)
1128                         element3s = NULL;
1129                 if (bufferobject3i)
1130                         bufferobject3s = 0;
1131         }
1132         if (element3i)
1133                 element3i += firsttriangle * 3;
1134         if (element3s)
1135                 element3s += firsttriangle * 3;
1136         switch (gl_vbo.integer)
1137         {
1138         default:
1139         case 0:
1140         case 2:
1141                 bufferobject3i = bufferobject3s = 0;
1142                 break;
1143         case 1:
1144                 break;
1145         case 3:
1146                 if (firsttriangle)
1147                         bufferobject3i = bufferobject3s = 0;
1148                 break;
1149         }
1150         CHECKGLERROR
1151         r_refdef.stats.meshes++;
1152         r_refdef.stats.meshes_elements += numelements;
1153         if (gl_paranoid.integer)
1154         {
1155                 unsigned int i, j, size;
1156                 const int *p;
1157                 // note: there's no validation done here on buffer objects because it
1158                 // is somewhat difficult to get at the data, and gl_paranoid can be
1159                 // used without buffer objects if the need arises
1160                 // (the data could be gotten using glMapBuffer but it would be very
1161                 //  slow due to uncachable video memory reads)
1162                 if (!qglIsEnabled(GL_VERTEX_ARRAY))
1163                         Con_Print("R_Mesh_Draw: vertex array not enabled\n");
1164                 CHECKGLERROR
1165                 if (gl_state.pointer_vertex)
1166                         for (j = 0, size = numvertices * 3, p = (int *)((float *)gl_state.pointer_vertex + firstvertex * 3);j < size;j++, p++)
1167                                 paranoidblah += *p;
1168                 if (gl_state.pointer_color_enabled)
1169                 {
1170                         if (!qglIsEnabled(GL_COLOR_ARRAY))
1171                                 Con_Print("R_Mesh_Draw: color array set but not enabled\n");
1172                         CHECKGLERROR
1173                         if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1174                                 for (j = 0, size = numvertices * 4, p = (int *)((float *)gl_state.pointer_color + firstvertex * 4);j < size;j++, p++)
1175                                         paranoidblah += *p;
1176                 }
1177                 for (i = 0;i < vid.texarrayunits;i++)
1178                 {
1179                         if (gl_state.units[i].arrayenabled)
1180                         {
1181                                 GL_ClientActiveTexture(i);
1182                                 if (!qglIsEnabled(GL_TEXTURE_COORD_ARRAY))
1183                                         Con_Print("R_Mesh_Draw: texcoord array set but not enabled\n");
1184                                 CHECKGLERROR
1185                                 if (gl_state.units[i].pointer_texcoord && gl_state.units[i].arrayenabled)
1186                                         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++)
1187                                                 paranoidblah += *p;
1188                         }
1189                 }
1190                 if (element3i)
1191                 {
1192                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1193                         {
1194                                 if (element3i[i] < firstvertex || element3i[i] >= firstvertex + numvertices)
1195                                 {
1196                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3i array\n", element3i[i], firstvertex, firstvertex + numvertices);
1197                                         return;
1198                                 }
1199                         }
1200                 }
1201                 if (element3s)
1202                 {
1203                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1204                         {
1205                                 if (element3s[i] < firstvertex || element3s[i] >= firstvertex + numvertices)
1206                                 {
1207                                         Con_Printf("R_Mesh_Draw: invalid vertex index %i (outside range %i - %i) in element3s array\n", element3s[i], firstvertex, firstvertex + numvertices);
1208                                         return;
1209                                 }
1210                         }
1211                 }
1212                 CHECKGLERROR
1213         }
1214         if (r_render.integer || r_refdef.draw2dstage)
1215         {
1216                 CHECKGLERROR
1217                 if (gl_mesh_testmanualfeeding.integer)
1218                 {
1219                         unsigned int i, j, element;
1220                         const GLfloat *p;
1221                         qglBegin(GL_TRIANGLES);
1222                         for (i = 0;i < (unsigned int) numtriangles * 3;i++)
1223                         {
1224                                 element = element3i ? element3i[i] : element3s[i];
1225                                 for (j = 0;j < vid.texarrayunits;j++)
1226                                 {
1227                                         if (gl_state.units[j].pointer_texcoord && gl_state.units[j].arrayenabled)
1228                                         {
1229                                                 if (vid.texarrayunits > 1)
1230                                                 {
1231                                                         if (gl_state.units[j].arraycomponents == 4)
1232                                                         {
1233                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1234                                                                 qglMultiTexCoord4f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2], p[3]);
1235                                                         }
1236                                                         else if (gl_state.units[j].arraycomponents == 3)
1237                                                         {
1238                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1239                                                                 qglMultiTexCoord3f(GL_TEXTURE0_ARB + j, p[0], p[1], p[2]);
1240                                                         }
1241                                                         else if (gl_state.units[j].arraycomponents == 2)
1242                                                         {
1243                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1244                                                                 qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, p[0], p[1]);
1245                                                         }
1246                                                         else
1247                                                         {
1248                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1249                                                                 qglMultiTexCoord1f(GL_TEXTURE0_ARB + j, p[0]);
1250                                                         }
1251                                                 }
1252                                                 else
1253                                                 {
1254                                                         if (gl_state.units[j].arraycomponents == 4)
1255                                                         {
1256                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 4;
1257                                                                 qglTexCoord4f(p[0], p[1], p[2], p[3]);
1258                                                         }
1259                                                         else if (gl_state.units[j].arraycomponents == 3)
1260                                                         {
1261                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 3;
1262                                                                 qglTexCoord3f(p[0], p[1], p[2]);
1263                                                         }
1264                                                         else if (gl_state.units[j].arraycomponents == 2)
1265                                                         {
1266                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 2;
1267                                                                 qglTexCoord2f(p[0], p[1]);
1268                                                         }
1269                                                         else
1270                                                         {
1271                                                                 p = ((const GLfloat *)(gl_state.units[j].pointer_texcoord)) + element * 1;
1272                                                                 qglTexCoord1f(p[0]);
1273                                                         }
1274                                                 }
1275                                         }
1276                                 }
1277                                 if (gl_state.pointer_color && gl_state.pointer_color_enabled)
1278                                 {
1279                                         p = ((const GLfloat *)(gl_state.pointer_color)) + element * 4;
1280                                         qglColor4f(p[0], p[1], p[2], p[3]);
1281                                 }
1282                                 p = ((const GLfloat *)(gl_state.pointer_vertex)) + element * 3;
1283                                 qglVertex3f(p[0], p[1], p[2]);
1284                         }
1285                         qglEnd();
1286                         CHECKGLERROR
1287                 }
1288                 else if (gl_mesh_testarrayelement.integer)
1289                 {
1290                         int i;
1291                         qglBegin(GL_TRIANGLES);
1292                         if (element3i)
1293                         {
1294                                 for (i = 0;i < numtriangles * 3;i++)
1295                                         qglArrayElement(element3i[i]);
1296                         }
1297                         else if (element3s)
1298                         {
1299                                 for (i = 0;i < numtriangles * 3;i++)
1300                                         qglArrayElement(element3s[i]);
1301                         }
1302                         qglEnd();
1303                         CHECKGLERROR
1304                 }
1305                 else if (bufferobject3s)
1306                 {
1307                         GL_BindEBO(bufferobject3s);
1308                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1309                         {
1310                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1311                                 CHECKGLERROR
1312                         }
1313                         else
1314                         {
1315                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
1316                                 CHECKGLERROR
1317                         }
1318                 }
1319                 else if (bufferobject3i)
1320                 {
1321                         GL_BindEBO(bufferobject3i);
1322                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1323                         {
1324                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1325                                 CHECKGLERROR
1326                         }
1327                         else
1328                         {
1329                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
1330                                 CHECKGLERROR
1331                         }
1332                 }
1333                 else if (element3s)
1334                 {
1335                         GL_BindEBO(0);
1336                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1337                         {
1338                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, element3s);
1339                                 CHECKGLERROR
1340                         }
1341                         else
1342                         {
1343                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_SHORT, element3s);
1344                                 CHECKGLERROR
1345                         }
1346                 }
1347                 else if (element3i)
1348                 {
1349                         GL_BindEBO(0);
1350                         if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
1351                         {
1352                                 qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, element3i);
1353                                 CHECKGLERROR
1354                         }
1355                         else
1356                         {
1357                                 qglDrawElements(GL_TRIANGLES, numelements, GL_UNSIGNED_INT, element3i);
1358                                 CHECKGLERROR
1359                         }
1360                 }
1361         }
1362 }
1363
1364 // restores backend state, used when done with 3D rendering
1365 void R_Mesh_Finish(void)
1366 {
1367 }
1368
1369 int R_Mesh_CreateStaticBufferObject(unsigned int target, void *data, size_t size, const char *name)
1370 {
1371         gl_bufferobjectinfo_t *info;
1372         GLuint bufferobject;
1373
1374         if (!gl_vbo.integer)
1375                 return 0;
1376
1377         qglGenBuffersARB(1, &bufferobject);
1378         switch(target)
1379         {
1380         case GL_ELEMENT_ARRAY_BUFFER_ARB: GL_BindEBO(bufferobject);break;
1381         case GL_ARRAY_BUFFER_ARB: GL_BindVBO(bufferobject);break;
1382         default: Sys_Error("R_Mesh_CreateStaticBufferObject: unknown target type %i\n", target);return 0;
1383         }
1384         qglBufferDataARB(target, size, data, GL_STATIC_DRAW_ARB);
1385
1386         info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_AllocRecord(&gl_state.bufferobjectinfoarray);
1387         memset(info, 0, sizeof(*info));
1388         info->target = target;
1389         info->object = bufferobject;
1390         info->size = size;
1391         strlcpy(info->name, name, sizeof(info->name));
1392
1393         return (int)bufferobject;
1394 }
1395
1396 void R_Mesh_DestroyBufferObject(int bufferobject)
1397 {
1398         int i, endindex;
1399         gl_bufferobjectinfo_t *info;
1400
1401         qglDeleteBuffersARB(1, (GLuint *)&bufferobject);
1402
1403         endindex = Mem_ExpandableArray_IndexRange(&gl_state.bufferobjectinfoarray);
1404         for (i = 0;i < endindex;i++)
1405         {
1406                 info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_RecordAtIndex(&gl_state.bufferobjectinfoarray, i);
1407                 if (!info)
1408                         continue;
1409                 if (info->object == bufferobject)
1410                 {
1411                         Mem_ExpandableArray_FreeRecord(&gl_state.bufferobjectinfoarray, (void *)info);
1412                         break;
1413                 }
1414         }
1415 }
1416
1417 void GL_Mesh_ListVBOs(qboolean printeach)
1418 {
1419         int i, endindex;
1420         size_t ebocount = 0, ebomemory = 0;
1421         size_t vbocount = 0, vbomemory = 0;
1422         gl_bufferobjectinfo_t *info;
1423         endindex = Mem_ExpandableArray_IndexRange(&gl_state.bufferobjectinfoarray);
1424         for (i = 0;i < endindex;i++)
1425         {
1426                 info = (gl_bufferobjectinfo_t *) Mem_ExpandableArray_RecordAtIndex(&gl_state.bufferobjectinfoarray, i);
1427                 if (!info)
1428                         continue;
1429                 switch(info->target)
1430                 {
1431                 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;
1432                 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;
1433                 default: Con_Printf("gl_vbostats: unknown target type %i\n", info->target);break;
1434                 }
1435         }
1436         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);
1437 }
1438
1439 void R_Mesh_VertexPointer(const float *vertex3f, int bufferobject, size_t bufferoffset)
1440 {
1441         if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1442                 bufferobject = 0;
1443         if (gl_state.pointer_vertex != vertex3f || gl_state.pointer_vertex_buffer != bufferobject || gl_state.pointer_vertex_offset != bufferoffset)
1444         {
1445                 gl_state.pointer_vertex = vertex3f;
1446                 gl_state.pointer_vertex_buffer = bufferobject;
1447                 gl_state.pointer_vertex_offset = bufferoffset;
1448                 CHECKGLERROR
1449                 GL_BindVBO(bufferobject);
1450                 qglVertexPointer(3, GL_FLOAT, sizeof(float[3]), bufferobject ? (void *)bufferoffset : vertex3f);CHECKGLERROR
1451         }
1452 }
1453
1454 void R_Mesh_ColorPointer(const float *color4f, int bufferobject, size_t bufferoffset)
1455 {
1456         // note: this can not rely on bufferobject to decide whether a color array
1457         // is supplied, because surfmesh_t shares one vbo for all arrays, which
1458         // means that a valid vbo may be supplied even if there is no color array.
1459         if (color4f)
1460         {
1461                 if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1462                         bufferobject = 0;
1463                 // caller wants color array enabled
1464                 if (!gl_state.pointer_color_enabled)
1465                 {
1466                         gl_state.pointer_color_enabled = true;
1467                         CHECKGLERROR
1468                         qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1469                 }
1470                 if (gl_state.pointer_color != color4f || gl_state.pointer_color_buffer != bufferobject || gl_state.pointer_color_offset != bufferoffset)
1471                 {
1472                         gl_state.pointer_color = color4f;
1473                         gl_state.pointer_color_buffer = bufferobject;
1474                         gl_state.pointer_color_offset = bufferoffset;
1475                         CHECKGLERROR
1476                         GL_BindVBO(bufferobject);
1477                         qglColorPointer(4, GL_FLOAT, sizeof(float[4]), bufferobject ? (void *)bufferoffset : color4f);CHECKGLERROR
1478                 }
1479         }
1480         else
1481         {
1482                 // caller wants color array disabled
1483                 if (gl_state.pointer_color_enabled)
1484                 {
1485                         gl_state.pointer_color_enabled = false;
1486                         CHECKGLERROR
1487                         qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
1488                         // when color array is on the glColor gets trashed, set it again
1489                         qglColor4f(gl_state.color4f[0], gl_state.color4f[1], gl_state.color4f[2], gl_state.color4f[3]);CHECKGLERROR
1490                 }
1491         }
1492 }
1493
1494 void R_Mesh_TexCoordPointer(unsigned int unitnum, unsigned int numcomponents, const float *texcoord, int bufferobject, size_t bufferoffset)
1495 {
1496         gltextureunit_t *unit = gl_state.units + unitnum;
1497         // update array settings
1498         CHECKGLERROR
1499         // note: there is no need to check bufferobject here because all cases
1500         // that involve a valid bufferobject also supply a texcoord array
1501         if (texcoord)
1502         {
1503                 if (!gl_vbo.integer || gl_mesh_testarrayelement.integer)
1504                         bufferobject = 0;
1505                 // texture array unit is enabled, enable the array
1506                 if (!unit->arrayenabled)
1507                 {
1508                         unit->arrayenabled = true;
1509                         GL_ClientActiveTexture(unitnum);
1510                         qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1511                 }
1512                 // texcoord array
1513                 if (unit->pointer_texcoord != texcoord || unit->pointer_texcoord_buffer != bufferobject || unit->pointer_texcoord_offset != bufferoffset || unit->arraycomponents != numcomponents)
1514                 {
1515                         unit->pointer_texcoord = texcoord;
1516                         unit->pointer_texcoord_buffer = bufferobject;
1517                         unit->pointer_texcoord_offset = bufferoffset;
1518                         unit->arraycomponents = numcomponents;
1519                         GL_ClientActiveTexture(unitnum);
1520                         GL_BindVBO(bufferobject);
1521                         qglTexCoordPointer(unit->arraycomponents, GL_FLOAT, sizeof(float) * unit->arraycomponents, bufferobject ? (void *)bufferoffset : texcoord);CHECKGLERROR
1522                 }
1523         }
1524         else
1525         {
1526                 // texture array unit is disabled, disable the array
1527                 if (unit->arrayenabled)
1528                 {
1529                         unit->arrayenabled = false;
1530                         GL_ClientActiveTexture(unitnum);
1531                         qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1532                 }
1533         }
1534 }
1535
1536 int R_Mesh_TexBound(unsigned int unitnum, int id)
1537 {
1538         gltextureunit_t *unit = gl_state.units + unitnum;
1539         if (unitnum >= vid.teximageunits)
1540                 return 0;
1541         if (id == GL_TEXTURE_2D)
1542                 return unit->t2d;
1543         if (id == GL_TEXTURE_3D)
1544                 return unit->t3d;
1545         if (id == GL_TEXTURE_CUBE_MAP_ARB)
1546                 return unit->tcubemap;
1547         if (id == GL_TEXTURE_RECTANGLE_ARB)
1548                 return unit->trectangle;
1549         return 0;
1550 }
1551
1552 void R_Mesh_CopyToTexture(rtexture_t *tex, int tx, int ty, int sx, int sy, int width, int height)
1553 {
1554         R_Mesh_TexBind(0, tex);
1555         GL_ActiveTexture(0);CHECKGLERROR
1556         qglCopyTexSubImage2D(GL_TEXTURE_2D, 0, tx, ty, sx, sy, width, height);CHECKGLERROR
1557 }
1558
1559 void R_Mesh_TexBind(unsigned int unitnum, rtexture_t *tex)
1560 {
1561         gltextureunit_t *unit = gl_state.units + unitnum;
1562         int tex2d, tex3d, texcubemap, texnum;
1563         if (unitnum >= vid.teximageunits)
1564                 return;
1565         switch(vid.renderpath)
1566         {
1567         case RENDERPATH_GL20:
1568         case RENDERPATH_CGGL:
1569                 if (!tex)
1570                         tex = r_texture_white;
1571                 texnum = R_GetTexture(tex);
1572                 switch(tex->gltexturetypeenum)
1573                 {
1574                 case GL_TEXTURE_2D: if (unit->t2d != texnum) {GL_ActiveTexture(unitnum);unit->t2d = texnum;qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR}break;
1575                 case GL_TEXTURE_3D: if (unit->t3d != texnum) {GL_ActiveTexture(unitnum);unit->t3d = texnum;qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR}break;
1576                 case GL_TEXTURE_CUBE_MAP_ARB: if (unit->tcubemap != texnum) {GL_ActiveTexture(unitnum);unit->tcubemap = texnum;qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR}break;
1577                 case GL_TEXTURE_RECTANGLE_ARB: if (unit->trectangle != texnum) {GL_ActiveTexture(unitnum);unit->trectangle = texnum;qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR}break;
1578                 }
1579                 break;
1580         case RENDERPATH_GL13:
1581         case RENDERPATH_GL11:
1582                 tex2d = 0;
1583                 tex3d = 0;
1584                 texcubemap = 0;
1585                 if (tex)
1586                 {
1587                         texnum = R_GetTexture(tex);
1588                         switch(tex->gltexturetypeenum)
1589                         {
1590                         case GL_TEXTURE_2D:
1591                                 tex2d = texnum;
1592                                 break;
1593                         case GL_TEXTURE_3D:
1594                                 tex3d = texnum;
1595                                 break;
1596                         case GL_TEXTURE_CUBE_MAP_ARB:
1597                                 texcubemap = texnum;
1598                                 break;
1599                         }
1600                 }
1601                 // update 2d texture binding
1602                 if (unit->t2d != tex2d)
1603                 {
1604                         GL_ActiveTexture(unitnum);
1605                         if (tex2d)
1606                         {
1607                                 if (unit->t2d == 0)
1608                                 {
1609                                         qglEnable(GL_TEXTURE_2D);CHECKGLERROR
1610                                 }
1611                         }
1612                         else
1613                         {
1614                                 if (unit->t2d)
1615                                 {
1616                                         qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1617                                 }
1618                         }
1619                         unit->t2d = tex2d;
1620                         qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1621                 }
1622                 // update 3d texture binding
1623                 if (unit->t3d != tex3d)
1624                 {
1625                         GL_ActiveTexture(unitnum);
1626                         if (tex3d)
1627                         {
1628                                 if (unit->t3d == 0)
1629                                 {
1630                                         qglEnable(GL_TEXTURE_3D);CHECKGLERROR
1631                                 }
1632                         }
1633                         else
1634                         {
1635                                 if (unit->t3d)
1636                                 {
1637                                         qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1638                                 }
1639                         }
1640                         unit->t3d = tex3d;
1641                         qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1642                 }
1643                 // update cubemap texture binding
1644                 if (unit->tcubemap != texcubemap)
1645                 {
1646                         GL_ActiveTexture(unitnum);
1647                         if (texcubemap)
1648                         {
1649                                 if (unit->tcubemap == 0)
1650                                 {
1651                                         qglEnable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1652                                 }
1653                         }
1654                         else
1655                         {
1656                                 if (unit->tcubemap)
1657                                 {
1658                                         qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1659                                 }
1660                         }
1661                         unit->tcubemap = texcubemap;
1662                         qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1663                 }
1664                 break;
1665         }
1666 }
1667
1668 static const float gl_identitymatrix[16] = {1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1};
1669
1670 void R_Mesh_TexMatrix(unsigned int unitnum, const matrix4x4_t *matrix)
1671 {
1672         gltextureunit_t *unit = gl_state.units + unitnum;
1673         if (matrix && matrix->m[3][3])
1674         {
1675                 // texmatrix specified, check if it is different
1676                 if (!unit->texmatrixenabled || memcmp(&unit->matrix, matrix, sizeof(matrix4x4_t)))
1677                 {
1678                         float glmatrix[16];
1679                         unit->texmatrixenabled = true;
1680                         unit->matrix = *matrix;
1681                         CHECKGLERROR
1682                         Matrix4x4_ToArrayFloatGL(&unit->matrix, glmatrix);
1683                         GL_ActiveTexture(unitnum);
1684                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1685                         qglLoadMatrixf(glmatrix);CHECKGLERROR
1686                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1687                 }
1688         }
1689         else
1690         {
1691                 // no texmatrix specified, revert to identity
1692                 if (unit->texmatrixenabled)
1693                 {
1694                         unit->texmatrixenabled = false;
1695                         unit->matrix = identitymatrix;
1696                         CHECKGLERROR
1697                         GL_ActiveTexture(unitnum);
1698                         qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1699                         qglLoadIdentity();CHECKGLERROR
1700                         qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1701                 }
1702         }
1703 }
1704
1705 void R_Mesh_TexCombine(unsigned int unitnum, int combinergb, int combinealpha, int rgbscale, int alphascale)
1706 {
1707         gltextureunit_t *unit = gl_state.units + unitnum;
1708         CHECKGLERROR
1709         switch(vid.renderpath)
1710         {
1711         case RENDERPATH_GL20:
1712         case RENDERPATH_CGGL:
1713                 // do nothing
1714                 break;
1715         case RENDERPATH_GL13:
1716                 // GL_ARB_texture_env_combine
1717                 if (!combinergb)
1718                         combinergb = GL_MODULATE;
1719                 if (!combinealpha)
1720                         combinealpha = GL_MODULATE;
1721                 if (!rgbscale)
1722                         rgbscale = 1;
1723                 if (!alphascale)
1724                         alphascale = 1;
1725                 if (combinergb != combinealpha || rgbscale != 1 || alphascale != 1)
1726                 {
1727                         if (combinergb == GL_DECAL)
1728                                 combinergb = GL_INTERPOLATE_ARB;
1729                         if (unit->combine != GL_COMBINE_ARB)
1730                         {
1731                                 unit->combine = GL_COMBINE_ARB;
1732                                 GL_ActiveTexture(unitnum);
1733                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
1734                                 qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);CHECKGLERROR // for GL_INTERPOLATE_ARB mode
1735                         }
1736                         if (unit->combinergb != combinergb)
1737                         {
1738                                 unit->combinergb = combinergb;
1739                                 GL_ActiveTexture(unitnum);
1740                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, unit->combinergb);CHECKGLERROR
1741                         }
1742                         if (unit->combinealpha != combinealpha)
1743                         {
1744                                 unit->combinealpha = combinealpha;
1745                                 GL_ActiveTexture(unitnum);
1746                                 qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, unit->combinealpha);CHECKGLERROR
1747                         }
1748                         if (unit->rgbscale != rgbscale)
1749                         {
1750                                 unit->rgbscale = rgbscale;
1751                                 GL_ActiveTexture(unitnum);
1752                                 qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, unit->rgbscale);CHECKGLERROR
1753                         }
1754                         if (unit->alphascale != alphascale)
1755                         {
1756                                 unit->alphascale = alphascale;
1757                                 GL_ActiveTexture(unitnum);
1758                                 qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, unit->alphascale);CHECKGLERROR
1759                         }
1760                 }
1761                 else
1762                 {
1763                         if (unit->combine != combinergb)
1764                         {
1765                                 unit->combine = combinergb;
1766                                 GL_ActiveTexture(unitnum);
1767                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1768                         }
1769                 }
1770                 break;
1771         case RENDERPATH_GL11:
1772                 // normal GL texenv
1773                 if (!combinergb)
1774                         combinergb = GL_MODULATE;
1775                 if (unit->combine != combinergb)
1776                 {
1777                         unit->combine = combinergb;
1778                         GL_ActiveTexture(unitnum);
1779                         qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1780                 }
1781                 break;
1782         }
1783 }
1784
1785 void R_Mesh_ResetTextureState(void)
1786 {
1787         unsigned int unitnum;
1788
1789         BACKENDACTIVECHECK
1790
1791         CHECKGLERROR
1792         switch(vid.renderpath)
1793         {
1794         case RENDERPATH_GL20:
1795         case RENDERPATH_CGGL:
1796                 for (unitnum = 0;unitnum < vid.teximageunits;unitnum++)
1797                 {
1798                         gltextureunit_t *unit = gl_state.units + unitnum;
1799                         if (unit->t2d)
1800                         {
1801                                 unit->t2d = 0;
1802                                 GL_ActiveTexture(unitnum);
1803                                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1804                         }
1805                         if (unit->t3d)
1806                         {
1807                                 unit->t3d = 0;
1808                                 GL_ActiveTexture(unitnum);
1809                                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1810                         }
1811                         if (unit->tcubemap)
1812                         {
1813                                 unit->tcubemap = 0;
1814                                 GL_ActiveTexture(unitnum);
1815                                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1816                         }
1817                         if (unit->trectangle)
1818                         {
1819                                 unit->trectangle = 0;
1820                                 GL_ActiveTexture(unitnum);
1821                                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1822                         }
1823                 }
1824                 for (unitnum = 0;unitnum < vid.texarrayunits;unitnum++)
1825                 {
1826                         gltextureunit_t *unit = gl_state.units + unitnum;
1827                         if (unit->arrayenabled)
1828                         {
1829                                 unit->arrayenabled = false;
1830                                 GL_ClientActiveTexture(unitnum);
1831                                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1832                         }
1833                 }
1834                 for (unitnum = 0;unitnum < vid.texunits;unitnum++)
1835                 {
1836                         gltextureunit_t *unit = gl_state.units + unitnum;
1837                         if (unit->texmatrixenabled)
1838                         {
1839                                 unit->texmatrixenabled = false;
1840                                 unit->matrix = identitymatrix;
1841                                 CHECKGLERROR
1842                                 GL_ActiveTexture(unitnum);
1843                                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1844                                 qglLoadIdentity();CHECKGLERROR
1845                                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1846                         }
1847                 }
1848                 break;
1849         case RENDERPATH_GL13:
1850         case RENDERPATH_GL11:
1851                 for (unitnum = 0;unitnum < vid.texunits;unitnum++)
1852                 {
1853                         gltextureunit_t *unit = gl_state.units + unitnum;
1854                         if (unit->t2d)
1855                         {
1856                                 unit->t2d = 0;
1857                                 GL_ActiveTexture(unitnum);
1858                                 qglDisable(GL_TEXTURE_2D);CHECKGLERROR
1859                                 qglBindTexture(GL_TEXTURE_2D, unit->t2d);CHECKGLERROR
1860                         }
1861                         if (unit->t3d)
1862                         {
1863                                 unit->t3d = 0;
1864                                 GL_ActiveTexture(unitnum);
1865                                 qglDisable(GL_TEXTURE_3D);CHECKGLERROR
1866                                 qglBindTexture(GL_TEXTURE_3D, unit->t3d);CHECKGLERROR
1867                         }
1868                         if (unit->tcubemap)
1869                         {
1870                                 unit->tcubemap = 0;
1871                                 GL_ActiveTexture(unitnum);
1872                                 qglDisable(GL_TEXTURE_CUBE_MAP_ARB);CHECKGLERROR
1873                                 qglBindTexture(GL_TEXTURE_CUBE_MAP_ARB, unit->tcubemap);CHECKGLERROR
1874                         }
1875                         if (unit->trectangle)
1876                         {
1877                                 unit->trectangle = 0;
1878                                 GL_ActiveTexture(unitnum);
1879                                 qglDisable(GL_TEXTURE_RECTANGLE_ARB);CHECKGLERROR
1880                                 qglBindTexture(GL_TEXTURE_RECTANGLE_ARB, unit->trectangle);CHECKGLERROR
1881                         }
1882                         if (unit->arrayenabled)
1883                         {
1884                                 unit->arrayenabled = false;
1885                                 GL_ClientActiveTexture(unitnum);
1886                                 qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
1887                         }
1888                         if (unit->texmatrixenabled)
1889                         {
1890                                 unit->texmatrixenabled = false;
1891                                 unit->matrix = identitymatrix;
1892                                 CHECKGLERROR
1893                                 GL_ActiveTexture(unitnum);
1894                                 qglMatrixMode(GL_TEXTURE);CHECKGLERROR
1895                                 qglLoadIdentity();CHECKGLERROR
1896                                 qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
1897                         }
1898                         if (unit->combine != GL_MODULATE)
1899                         {
1900                                 unit->combine = GL_MODULATE;
1901                                 GL_ActiveTexture(unitnum);
1902                                 qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, unit->combine);CHECKGLERROR
1903                         }
1904                 }
1905                 break;
1906         }
1907 }