gl_rsurf.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // r_surf.c: surface-related refresh code
  21
  22 #include "quakedef.h"
  23
  24 extern int                     skytexturenum;
  25
  26 int             lightmap_textures;
  27
  28 signed blocklights[18*18*3]; // LordHavoc: *3 for colored lighting
  29
  30 // LordHavoc: skinny but tall lightmaps for quicker subimage uploads
  31 #define BLOCK_WIDTH             128
  32 #define BLOCK_HEIGHT    128
  33 // LordHavoc: increased lightmap limit from 64 to 1024
  34 #define MAX_LIGHTMAPS   1024
  35 #define LIGHTMAPSIZE    (BLOCK_WIDTH*BLOCK_HEIGHT*4)
  36
  37 int                     active_lightmaps;
  38
  39 short allocated[MAX_LIGHTMAPS][BLOCK_WIDTH];
  40
  41 byte *lightmaps[MAX_LIGHTMAPS];
  42 short lightmapupdate[MAX_LIGHTMAPS][2];
  43
  44 int lightmapalign, lightmapalignmask; // LordHavoc: NVIDIA's broken subimage fix, see BuildLightmaps for notes
  45 cvar_t gl_lightmapalign = {"gl_lightmapalign", "4"};
  46 cvar_t gl_lightmaprgba = {"gl_lightmaprgba", "0"};
  47 cvar_t gl_nosubimagefragments = {"gl_nosubimagefragments", "0"};
  48 cvar_t gl_nosubimage = {"gl_nosubimage", "0"};
  49 cvar_t r_ambient = {"r_ambient", "0"};
  50 cvar_t gl_vertex = {"gl_vertex", "0"};
  51 cvar_t gl_texsort = {"gl_texsort", "1"};
  52 //cvar_t gl_funnywalls = {"gl_funnywalls", "0"}; // LordHavoc: see BuildSurfaceDisplayList
  53
  54 qboolean lightmaprgba, nosubimagefragments, nosubimage, skyisvisible;
  55 int lightmapbytes;
  56
  57 extern qboolean gl_arrays;
  58
  59 extern int r_dlightframecount;
  60
  61 void gl_surf_start()
  62 {
  63 }
  64
  65 void gl_surf_shutdown()
  66 {
  67 }
  68
  69 void GL_Surf_Init()
  70 {
  71         int i;
  72         for (i = 0;i < MAX_LIGHTMAPS;i++)
  73                 lightmaps[i] = NULL;
  74         Cvar_RegisterVariable(&gl_lightmapalign);
  75         Cvar_RegisterVariable(&gl_lightmaprgba);
  76         Cvar_RegisterVariable(&gl_nosubimagefragments);
  77         Cvar_RegisterVariable(&gl_nosubimage);
  78         Cvar_RegisterVariable(&r_ambient);
  79 //      Cvar_RegisterVariable(&gl_funnywalls);
  80         Cvar_RegisterVariable(&gl_vertex);
  81         Cvar_RegisterVariable(&gl_texsort);
  82         // check if it's the glquake minigl driver
  83         if (strncasecmp(gl_vendor,"3Dfx",4)==0)
  84         if (!gl_arrays)
  85         {
  86 //              Cvar_SetValue("gl_nosubimagefragments", 1);
  87 //              Cvar_SetValue("gl_nosubimage", 1);
  88                 Cvar_SetValue("gl_lightmode", 0);
  89         }
  90
  91         R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown);
  92 }
  93
  94 extern qboolean lighthalf;
  95 /*
  96 ===============
  97 R_BuildLightMap
  98
  99 Combine and scale multiple lightmaps into the 8.8 format in blocklights
 100 ===============
 101 */
 102 void R_BuildLightMap (msurface_t *surf, byte *dest, int stride)
 103 {
 104         int                     smax, tmax;
 105         int                     t;
 106         int                     i, j, size;
 107         byte            *lightmap;
 108         int                     scale;
 109         int                     maps;
 110         int                     *bl;
 111
 112         surf->cached_lighthalf = lighthalf;
 113         surf->cached_ambient = r_ambient.value;
 114
 115         smax = (surf->extents[0]>>4)+1;
 116         tmax = (surf->extents[1]>>4)+1;
 117         size = smax*tmax;
 118         lightmap = surf->samples;
 119
 120 // set to full bright if no light data
 121         if (currententity->effects & EF_FULLBRIGHT || !cl.worldmodel->lightdata)
 122         {
 123                 bl = blocklights;
 124                 for (i=0 ; i<size ; i++)
 125                 {
 126                         *bl++ = 255*256;
 127                         *bl++ = 255*256;
 128                         *bl++ = 255*256;
 129                 }
 130         }
 131         else
 132         {
 133 // clear to no light
 134                 bl = blocklights;
 135                 j = r_ambient.value * 512.0f; // would be 256.0f logically, but using 512.0f to match winquake style
 136                 for (i=0 ; i<size ; i++)
 137                 {
 138                         *bl++ = j;
 139                         *bl++ = j;
 140                         *bl++ = j;
 141                 }
 142
 143 // add all the lightmaps
 144                 if (lightmap)
 145                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++)
 146                         {
 147                                 scale = d_lightstylevalue[surf->styles[maps]];
 148                                 surf->cached_light[maps] = scale;       // 8.8 fraction
 149                                 bl = blocklights;
 150                                 for (i=0 ; i<size ; i++)
 151                                 {
 152                                         *bl++ += *lightmap++ * scale;
 153                                         *bl++ += *lightmap++ * scale;
 154                                         *bl++ += *lightmap++ * scale;
 155                                 }
 156                         }
 157         }
 158         stride -= (smax*lightmapbytes);
 159         bl = blocklights;
 160         if (lighthalf)
 161         {
 162                 // LordHavoc: I shift down by 8 unlike GLQuake's 7,
 163                 // the image is brightened as a processing pass
 164                 if (lightmaprgba)
 165                 {
 166                         for (i=0 ; i<tmax ; i++, dest += stride)
 167                         {
 168                                 for (j=0 ; j<smax ; j++)
 169                                 {
 170                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 171                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 172                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 173                                         *dest++ = 255;
 174                                 }
 175                         }
 176                 }
 177                 else
 178                 {
 179                         for (i=0 ; i<tmax ; i++, dest += stride)
 180                         {
 181                                 for (j=0 ; j<smax ; j++)
 182                                 {
 183                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 184                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 185                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 186                                 }
 187                         }
 188                 }
 189         }
 190         else
 191         {
 192                 if (lightmaprgba)
 193                 {
 194                         for (i=0 ; i<tmax ; i++, dest += stride)
 195                         {
 196                                 for (j=0 ; j<smax ; j++)
 197                                 {
 198                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 199                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 200                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 201                                         *dest++ = 255;
 202                                 }
 203                         }
 204                 }
 205                 else
 206                 {
 207                         for (i=0 ; i<tmax ; i++, dest += stride)
 208                         {
 209                                 for (j=0 ; j<smax ; j++)
 210                                 {
 211                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 212                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 213                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 214                                 }
 215                         }
 216                 }
 217         }
 218 }
 219
 220 byte templight[32*32*4];
 221
 222 void R_UpdateLightmap(msurface_t *s, int lnum)
 223 {
 224         int smax, tmax;
 225         // upload the new lightmap texture fragment
 226         if(r_upload.value)
 227                 glBindTexture(GL_TEXTURE_2D, lightmap_textures + lnum);
 228         if (nosubimage || nosubimagefragments)
 229         {
 230                 if (lightmapupdate[lnum][0] > s->light_t)
 231                         lightmapupdate[lnum][0] = s->light_t;
 232                 if (lightmapupdate[lnum][1] < (s->light_t + ((s->extents[1]>>4)+1)))
 233                         lightmapupdate[lnum][1] = (s->light_t + ((s->extents[1]>>4)+1));
 234                 if (lightmaprgba)
 235                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 4, BLOCK_WIDTH * 4);
 236                 else
 237                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 3, BLOCK_WIDTH * 3);
 238         }
 239         else
 240         {
 241                 smax = ((s->extents[0]>>4)+lightmapalign) & lightmapalignmask;
 242                 tmax = (s->extents[1]>>4)+1;
 243                 if (lightmaprgba)
 244                 {
 245                         R_BuildLightMap (s, templight, smax * 4);
 246                         if(r_upload.value)
 247                                 glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
 248                 }
 249                 else
 250                 {
 251                         R_BuildLightMap (s, templight, smax * 3);
 252                         if(r_upload.value)
 253                                 glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
 254                 }
 255         }
 256 }
 257
 258
 259 /*
 260 ===============
 261 R_TextureAnimation
 262
 263 Returns the proper texture for a given time and base texture
 264 ===============
 265 */
 266 texture_t *R_TextureAnimation (texture_t *base)
 267 {
 268         texture_t *original;
 269         int             relative;
 270         int             count;
 271
 272         if (currententity->frame)
 273         {
 274                 if (base->alternate_anims)
 275                         base = base->alternate_anims;
 276         }
 277
 278         if (!base->anim_total)
 279                 return base;
 280
 281         original = base;
 282
 283         relative = (int)(cl.time*10) % base->anim_total;
 284
 285         count = 0;
 286         while (base->anim_min > relative || base->anim_max <= relative)
 287         {
 288                 base = base->anim_next;
 289                 if (!base)
 290                 {
 291                         Con_Printf("R_TextureAnimation: broken cycle");
 292                         return original;
 293                 }
 294                 if (++count > 100)
 295                 {
 296                         Con_Printf("R_TextureAnimation: infinite cycle");
 297                         return original;
 298                 }
 299         }
 300
 301         return base;
 302 }
 303
 304
 305 /*
 306 =============================================================
 307
 308         BRUSH MODELS
 309
 310 =============================================================
 311 */
 312
 313
 314 extern  int             solidskytexture;
 315 extern  int             alphaskytexture;
 316 extern  float   speedscale;             // for top sky and bottom sky
 317
 318 extern char skyname[];
 319
 320 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 321 float   turbsin[256] =
 322 {
 323         #include "gl_warp_sin.h"
 324 };
 325 #define TURBSCALE (256.0 / (2 * M_PI))
 326
 327
 328 void UploadLightmaps()
 329 {
 330         int i;
 331         if (nosubimage || nosubimagefragments)
 332         {
 333                 for (i = 0;i < MAX_LIGHTMAPS;i++)
 334                 {
 335                         if (lightmapupdate[i][0] < lightmapupdate[i][1])
 336                         {
 337                                 if(r_upload.value)
 338                                 {
 339                                         glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
 340                                         if (nosubimage)
 341                                         {
 342                                                 if (lightmaprgba)
 343                                                         glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
 344                                                 else
 345                                                         glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
 346                                         }
 347                                         else
 348                                         {
 349                                                 if (lightmaprgba)
 350                                                         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 4 * lightmapupdate[i][0]));
 351                                                 else
 352                                                         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 3 * lightmapupdate[i][0]));
 353                                         }
 354                                 }
 355                         }
 356                         lightmapupdate[i][0] = BLOCK_HEIGHT;
 357                         lightmapupdate[i][1] = 0;
 358                 }
 359         }
 360 }
 361
 362 float   wvert[1024*6]; // used by the following functions
 363
 364 void RSurf_DrawSky(msurface_t *s, int transform)
 365 {
 366         glpoly_t *p;
 367         int i;
 368         float *v;
 369         for (p=s->polys ; p ; p=p->next)
 370         {
 371                 if (currentskypoly < MAX_SKYPOLYS && currentskyvert + p->numverts <= MAX_SKYVERTS)
 372                 {
 373                         skypoly[currentskypoly].firstvert = currentskyvert;
 374                         skypoly[currentskypoly++].verts = p->numverts;
 375                         if (transform)
 376                         {
 377                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 378                                 {
 379                                         softwaretransform(v, skyvert[currentskyvert].v);
 380                                         currentskyvert++;
 381                                 }
 382                         }
 383                         else
 384                         {
 385                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 386                                 {
 387                                         skyvert[currentskyvert].v[0] = v[0];
 388                                         skyvert[currentskyvert].v[1] = v[1];
 389                                         skyvert[currentskyvert++].v[2] = v[2];
 390                                 }
 391                         }
 392                 }
 393         }
 394 }
 395
 396 int RSurf_Light(int *dlightbits, glpoly_t *polys)
 397 {
 398         float           cr, cg, cb, radius, radius2, f, *v, *wv;
 399         int                     i, a, b, lit = false;
 400         unsigned int c, d;
 401         dlight_t        *light;
 402         vec_t           *lightorigin;
 403         glpoly_t        *p;
 404         for (a = 0;a < 8;a++)
 405         {
 406                 if ((c = dlightbits[a]))
 407                 {
 408                         for (b = 0, d = 1;c;b++, d <<= 1)
 409                         {
 410                                 if (c & d)
 411                                 {
 412                                         c -= d;
 413                                         light = &cl_dlights[a * 32 + b];
 414                                         lightorigin = light->origin;
 415                                         cr = light->color[0];
 416                                         cg = light->color[1];
 417                                         cb = light->color[2];
 418                                         radius = light->radius*light->radius*LIGHTSCALE;
 419                                         radius2 = radius * (256.0f / LIGHTSCALE);
 420                                         wv = wvert;
 421                                         for (p = polys;p;p = p->next)
 422                                         {
 423                                                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 424                                                 {
 425                                                         f = VectorDistance2(wv, lightorigin);
 426                                                         if (f < radius)
 427                                                         {
 428                                                                 f = radius2 / (f + LIGHTOFFSET);
 429                                                                 wv[3] += cr * f;
 430                                                                 wv[4] += cg * f;
 431                                                                 wv[5] += cb * f;
 432                                                                 lit = true;
 433                                                         }
 434                                                         wv += 6;
 435                                                 }
 436                                         }
 437                                 }
 438                         }
 439                 }
 440         }
 441         return lit;
 442 }
 443
 444 void RSurf_DrawWater(msurface_t *s, texture_t *t, int transform, int alpha)
 445 {
 446         int             i;
 447         float   os = turbsin[(int)(realtime * TURBSCALE) & 255], ot = turbsin[(int)(realtime * TURBSCALE + 96.0) & 255];
 448         glpoly_t *p;
 449         float   *wv, *v;
 450         wv = wvert;
 451         for (p = s->polys;p;p = p->next)
 452         {
 453                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 454                 {
 455                         if (transform)
 456                                 softwaretransform(v, wv);
 457                         else
 458                                 VectorCopy(v, wv);
 459                         if (r_waterripple.value)
 460                                 wv[2] += r_waterripple.value * turbsin[(int)((wv[0]*(1.0f/32.0f)+realtime) * TURBSCALE) & 255] * turbsin[(int)((wv[1]*(1.0f/32.0f)+realtime) * TURBSCALE) & 255] * (1.0f / 64.0f);
 461                         wv[3] = wv[4] = wv[5] = 128.0f;
 462                         wv += 6;
 463                 }
 464         }
 465         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 466                 RSurf_Light(s->dlightbits, s->polys);
 467         wv = wvert;
 468         // FIXME: make fog texture if water texture is transparent?
 469         for (p=s->polys ; p ; p=p->next)
 470         {
 471                 transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, TPOLYTYPE_ALPHA);
 472                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 473                         transpolyvert(wv[0], wv[1], wv[2], (v[3] + os) * (1.0f/64.0f), (v[4] + ot) * (1.0f/64.0f), wv[3], wv[4], wv[5], alpha);
 474                 transpolyend();
 475         }
 476 }
 477
 478 void RSurf_DrawWall(msurface_t *s, texture_t *t, int transform)
 479 {
 480         int             i, lit = false, polys = 0, verts = 0;
 481         float   *v, *wv;
 482         glpoly_t *p;
 483         wallpoly_t *wp;
 484         wallvert_t *out;
 485         // check for lightmap modification
 486         if (r_dynamic.value)
 487         {
 488                 if (r_ambient.value != s->cached_ambient || lighthalf != s->cached_lighthalf
 489                 || (s->styles[0] != 255 && d_lightstylevalue[s->styles[0]] != s->cached_light[0])
 490                 || (s->styles[1] != 255 && d_lightstylevalue[s->styles[1]] != s->cached_light[1])
 491                 || (s->styles[2] != 255 && d_lightstylevalue[s->styles[2]] != s->cached_light[2])
 492                 || (s->styles[3] != 255 && d_lightstylevalue[s->styles[3]] != s->cached_light[3]))
 493                         R_UpdateLightmap(s, s->lightmaptexturenum);
 494         }
 495         wv = wvert;
 496         for (p = s->polys;p;p = p->next)
 497         {
 498                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 499                 {
 500                         if (transform)
 501                                 softwaretransform(v, wv);
 502                         else
 503                                 VectorCopy(v, wv);
 504                         wv[3] = wv[4] = wv[5] = 0.0f;
 505                         wv += 6;
 506                 }
 507                 verts += p->numverts;
 508                 polys++;
 509         }
 510         if ((currentwallpoly + polys > MAX_WALLPOLYS) || (currentwallvert+verts > MAX_WALLVERTS))
 511                 return;
 512         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 513                 lit = RSurf_Light(s->dlightbits, s->polys);
 514         wv = wvert;
 515         wp = &wallpoly[currentwallpoly];
 516         out = &wallvert[currentwallvert];
 517         currentwallpoly += polys;
 518         for (p = s->polys;p;p = p->next)
 519         {
 520                 v = p->verts[0];
 521                 wp->texnum = (unsigned short) t->gl_texturenum;
 522                 wp->lighttexnum = (unsigned short) (lightmap_textures + s->lightmaptexturenum);
 523                 wp->glowtexnum = (unsigned short) t->gl_glowtexturenum;
 524                 wp->firstvert = currentwallvert;
 525                 wp->numverts = p->numverts;
 526                 wp->lit = lit;
 527                 wp++;
 528                 currentwallvert += p->numverts;
 529                 for (i = 0;i < p->numverts;i++, v += VERTEXSIZE, wv += 6, out++)
 530                 {
 531                         if (lit)
 532                         {
 533                                 if (lighthalf)
 534                                 {
 535                                         out->r = (byte) (bound(0, (int) wv[3] >> 1, 255));
 536                                         out->g = (byte) (bound(0, (int) wv[4] >> 1, 255));
 537                                         out->b = (byte) (bound(0, (int) wv[5] >> 1, 255));
 538                                         out->a = 255;
 539                                 }
 540                                 else
 541                                 {
 542                                         out->r = (byte) (bound(0, (int) wv[3], 255));
 543                                         out->g = (byte) (bound(0, (int) wv[4], 255));
 544                                         out->b = (byte) (bound(0, (int) wv[5], 255));
 545                                         out->a = 255;
 546                                 }
 547                         }
 548                         out->vert[0] = wv[0];
 549                         out->vert[1] = wv[1];
 550                         out->vert[2] = wv[2];
 551                         out->s = v[3];
 552                         out->t = v[4];
 553                         out->u = v[5];
 554                         out->v = v[6];
 555                 }
 556         }
 557 }
 558
 559 // LordHavoc: transparent brush models
 560 extern int r_dlightframecount;
 561 extern float modelalpha;
 562
 563 void RSurf_DrawWallVertex(msurface_t *s, texture_t *t, int transform, int isbmodel)
 564 {
 565         int i, alpha, size3;
 566         float *v, *wv, scale;
 567         glpoly_t *p;
 568         byte *lm;
 569         alpha = (int) (modelalpha * 255.0f);
 570         size3 = ((s->extents[0]>>4)+1)*((s->extents[1]>>4)+1)*3; // *3 for colored lighting
 571         wv = wvert;
 572         for (p = s->polys;p;p = p->next)
 573         {
 574                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 575                 {
 576                         if (transform)
 577                                 softwaretransform(v, wv);
 578                         else
 579                                 VectorCopy(v, wv);
 580                         wv[3] = wv[4] = wv[5] = r_ambient.value * 2.0f;
 581                         if (s->styles[0] != 255)
 582                         {
 583                                 lm = (byte *)((long) s->samples + (int) v[7]);
 584                                 scale = d_lightstylevalue[s->styles[0]] * (1.0f / 128.0f);wv[3] += lm[size3*0+0] * scale;wv[4] += lm[size3*0+1] * scale;wv[5] += lm[size3*0+2] * scale;
 585                                 if (s->styles[1] != 255)
 586                                 {
 587                                         scale = d_lightstylevalue[s->styles[1]] * (1.0f / 128.0f);wv[3] += lm[size3*1+0] * scale;wv[4] += lm[size3*1+1] * scale;wv[5] += lm[size3*1+2] * scale;
 588                                         if (s->styles[2] != 255)
 589                                         {
 590                                                 scale = d_lightstylevalue[s->styles[2]] * (1.0f / 128.0f);wv[3] += lm[size3*2+0] * scale;wv[4] += lm[size3*2+1] * scale;wv[5] += lm[size3*2+2] * scale;
 591                                                 if (s->styles[3] != 255)
 592                                                 {
 593                                                         scale = d_lightstylevalue[s->styles[3]] * (1.0f / 128.0f);wv[3] += lm[size3*3+0] * scale;wv[4] += lm[size3*3+1] * scale;wv[5] += lm[size3*3+2] * scale;
 594                                                 }
 595                                         }
 596                                 }
 597                         }
 598                         wv += 6;
 599                 }
 600         }
 601         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 602                 RSurf_Light(s->dlightbits, s->polys);
 603         wv = wvert;
 604         if (isbmodel && (currententity->colormod[0] != 1 || currententity->colormod[1] != 1 || currententity->colormod[2] != 1))
 605         {
 606                 for (p = s->polys;p;p = p->next)
 607                 {
 608                         v = p->verts[0];
 609                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 610                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 611                                 transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], wv[3] * currententity->colormod[0], wv[4] * currententity->colormod[1], wv[5] * currententity->colormod[2], alpha);
 612                         transpolyend();
 613                 }
 614         }
 615         else
 616         {
 617                 for (p = s->polys;p;p = p->next)
 618                 {
 619                         v = p->verts[0];
 620                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 621                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 622                                 transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], wv[3], wv[4], wv[5], alpha);
 623                         transpolyend();
 624                 }
 625         }
 626 }
 627
 628 /*
 629 ================
 630 DrawTextureChains
 631 ================
 632 */
 633 extern qboolean hlbsp;
 634 extern char skyname[];
 635 void R_DrawSurf(msurface_t *s, int isbmodel, int vertexlit)
 636 {
 637         texture_t *t;
 638         if (s->flags & SURF_DRAWSKY)
 639         {
 640                 skyisvisible = true;
 641                 if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
 642                         RSurf_DrawSky(s, false);
 643                 return;
 644         }
 645         t = R_TextureAnimation (s->texinfo->texture);
 646         if (s->flags & SURF_DRAWTURB)
 647         {
 648                 RSurf_DrawWater(s, t, false, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
 649                 return;
 650         }
 651         if (vertexlit)
 652                 RSurf_DrawWallVertex(s, t, false, false);
 653         else
 654                 RSurf_DrawWall(s, t, false);
 655 }
 656
 657 void DrawTextureChains (void)
 658 {
 659         int                     n;
 660         msurface_t      *s;
 661         texture_t       *t;
 662
 663         for (n = 0;n < cl.worldmodel->numtextures;n++)
 664         {
 665                 if (!cl.worldmodel->textures[n] || !(s = cl.worldmodel->textures[n]->texturechain))
 666                         continue;
 667                 cl.worldmodel->textures[n]->texturechain = NULL;
 668 //              for (;s;s = s->texturechain)
 669 //                      R_DrawSurf(s, false, gl_vertex.value);
 670                 // LordHavoc: decide the render type only once, because the surface properties were determined by texture anyway
 671                 // sky
 672                 if (s->flags & SURF_DRAWSKY)
 673                 {
 674                         skyisvisible = true;
 675                         if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
 676                                 for (;s;s = s->texturechain)
 677                                         RSurf_DrawSky(s, false);
 678                         continue;
 679                 }
 680                 t = R_TextureAnimation (cl.worldmodel->textures[n]);
 681                 // subdivided water surface warp
 682                 if (s->flags & SURF_DRAWTURB)
 683                 {
 684                         int alpha = s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f;
 685                         for (;s;s = s->texturechain)
 686                                 RSurf_DrawWater(s, t, false, alpha);
 687                         continue;
 688                 }
 689                 if (gl_vertex.value)
 690                         for (;s;s = s->texturechain)
 691                                 RSurf_DrawWallVertex(s, t, false, false);
 692                 else
 693                         for (;s;s = s->texturechain)
 694                                 RSurf_DrawWall(s, t, false);
 695         }
 696 }
 697
 698 void R_NoVisMarkLights (vec3_t lightorigin, dlight_t *light, int bit, int bitindex, model_t *model);
 699
 700 /*
 701 =================
 702 R_DrawBrushModel
 703 =================
 704 */
 705 void R_DrawBrushModel (entity_t *e)
 706 {
 707         int                     i;
 708         vec3_t          mins, maxs;
 709         msurface_t      *s;
 710         model_t         *clmodel;
 711         int     rotated, vertexlit = false;
 712         texture_t       *t;
 713         vec3_t          org;
 714
 715         currententity = e;
 716
 717         clmodel = e->model;
 718
 719         if (e->angles[0] || e->angles[1] || e->angles[2])
 720         {
 721                 rotated = true;
 722                 for (i=0 ; i<3 ; i++)
 723                 {
 724                         mins[i] = e->origin[i] - clmodel->radius;
 725                         maxs[i] = e->origin[i] + clmodel->radius;
 726                 }
 727         }
 728         else
 729         {
 730                 rotated = false;
 731                 VectorAdd (e->origin, clmodel->mins, mins);
 732                 VectorAdd (e->origin, clmodel->maxs, maxs);
 733         }
 734
 735         if (R_CullBox (mins, maxs))
 736                 return;
 737
 738         VectorSubtract (r_refdef.vieworg, e->origin, modelorg);
 739         if (rotated)
 740         {
 741                 vec3_t  temp;
 742                 vec3_t  forward, right, up;
 743
 744                 VectorCopy (modelorg, temp);
 745                 AngleVectors (e->angles, forward, right, up);
 746                 modelorg[0] = DotProduct (temp, forward);
 747                 modelorg[1] = -DotProduct (temp, right);
 748                 modelorg[2] = DotProduct (temp, up);
 749         }
 750
 751         s = &clmodel->surfaces[clmodel->firstmodelsurface];
 752
 753 // calculate dynamic lighting for bmodel if it's not an
 754 // instanced model
 755         for (i = 0;i < MAX_DLIGHTS;i++)
 756         {
 757                 if ((cl_dlights[i].die < cl.time) || (!cl_dlights[i].radius))
 758                         continue;
 759
 760                 VectorSubtract(cl_dlights[i].origin, currententity->origin, org);
 761                 R_NoVisMarkLights (org, &cl_dlights[i], 1<<(i&31), i >> 5, clmodel);
 762         }
 763         vertexlit = modelalpha != 1 || clmodel->firstmodelsurface == 0 || (currententity->effects & EF_FULLBRIGHT) || currententity->colormod[0] != 1 || currententity->colormod[2] != 1 || currententity->colormod[2] != 1;
 764
 765 e->angles[0] = -e->angles[0];   // stupid quake bug
 766         softwaretransformforentity (e);
 767 e->angles[0] = -e->angles[0];   // stupid quake bug
 768
 769         // draw texture
 770         for (i = 0;i < clmodel->nummodelsurfaces;i++, s++)
 771         {
 772                 if (((s->flags & SURF_PLANEBACK) == 0) == (PlaneDiff(modelorg, s->plane) >= 0))
 773                 {
 774 //                      R_DrawSurf(s, true, vertexlit || s->texinfo->texture->transparent);
 775                         if (s->flags & SURF_DRAWSKY)
 776                         {
 777                                 RSurf_DrawSky(s, true);
 778                                 continue;
 779                         }
 780                         t = R_TextureAnimation (s->texinfo->texture);
 781                         if (s->flags & SURF_DRAWTURB)
 782                         {
 783                                 RSurf_DrawWater(s, t, true, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
 784                                 continue;
 785                         }
 786                         if (vertexlit || s->texinfo->texture->transparent)
 787                                 RSurf_DrawWallVertex(s, t, true, true);
 788                         else
 789                                 RSurf_DrawWall(s, t, true);
 790                 }
 791         }
 792         UploadLightmaps();
 793 }
 794
 795 /*
 796 =============================================================
 797
 798         WORLD MODEL
 799
 800 =============================================================
 801 */
 802
 803 void R_StoreEfrags (efrag_t **ppefrag);
 804
 805 struct nodestack_s
 806 {
 807         int side;
 808         mnode_t *node;
 809 } nodestack[8192];
 810
 811 /*
 812 ================
 813 R_WorldNode
 814 ================
 815 */
 816 void R_WorldNode ()
 817 {
 818         int side, texsort, vertex;
 819         struct nodestack_s *nstack;
 820         mnode_t *node;
 821         mleaf_t *pleaf;
 822         msurface_t *surf, *endsurf, **mark, **endmark;
 823         nstack = nodestack;
 824         texsort = gl_texsort.value;
 825         vertex = gl_vertex.value;
 826
 827         if (!(node = cl.worldmodel->nodes))
 828                 return;
 829
 830         while(1)
 831         {
 832         // if a leaf node, draw stuff
 833                 if (node->contents < 0)
 834                 {
 835                         if (node->contents != CONTENTS_SOLID)
 836                         {
 837                                 pleaf = (mleaf_t *)node;
 838
 839                                 c_leafs++;
 840                                 if (pleaf->nummarksurfaces)
 841                                 {
 842                                         mark = pleaf->firstmarksurface;
 843                                         endmark = mark + pleaf->nummarksurfaces;
 844                                         do
 845                                         {
 846                                                 (*mark)->visframe = r_framecount;
 847                                                 mark++;
 848                                         }
 849                                         while (mark < endmark);
 850                                 }
 851
 852                                 // deal with model fragments in this leaf
 853                                 if (pleaf->efrags)
 854                                         R_StoreEfrags (&pleaf->efrags);
 855                         }
 856
 857                         if (nstack <= nodestack)
 858                                 break;
 859                         nstack--;
 860                         node = nstack->node;
 861                         side = nstack->side;
 862                         goto loc0;
 863                 }
 864
 865                 c_nodes++;
 866
 867                 // node is just a decision point, so go down the apropriate sides
 868
 869                 // find which side of the node we are on
 870                 side = PlaneDist(modelorg, node->plane) < node->plane->dist;
 871
 872                 // recurse down the children, front side first
 873                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 874                 {
 875                         nstack->node = node;
 876                         nstack->side = !side; // go down back side when we come back up
 877                         nstack++;
 878                         node = node->children[side];
 879                         continue;
 880                 }
 881                 side = !side;
 882 loc0:
 883
 884         // draw stuff
 885                 if (node->numsurfaces)
 886                 {
 887                         surf = cl.worldmodel->surfaces + node->firstsurface;
 888                         endsurf = surf + node->numsurfaces;
 889
 890                         if (texsort)
 891                         {
 892                                 if (side)
 893                                 {
 894                                         do
 895                                         {
 896                                                 if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
 897                                                 {
 898                                                         surf->texturechain = surf->texinfo->texture->texturechain;
 899                                                         surf->texinfo->texture->texturechain = surf;
 900                                                 }
 901                                                 surf++;
 902                                         }
 903                                         while (surf < endsurf);
 904                                 }
 905                                 else
 906                                 {
 907                                         do
 908                                         {
 909                                                 if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
 910                                                 {
 911                                                         surf->texturechain = surf->texinfo->texture->texturechain;
 912                                                         surf->texinfo->texture->texturechain = surf;
 913                                                 }
 914                                                 surf++;
 915                                         }
 916                                         while (surf < endsurf);
 917                                 }
 918                         }
 919                         else
 920                         {
 921                                 if (side)
 922                                 {
 923                                         do
 924                                         {
 925                                                 if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
 926                                                         R_DrawSurf(surf, false, vertex);
 927                                                 surf++;
 928                                         }
 929                                         while (surf < endsurf);
 930                                 }
 931                                 else
 932                                 {
 933                                         do
 934                                         {
 935                                                 if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
 936                                                         R_DrawSurf(surf, false, vertex);
 937                                                 surf++;
 938                                         }
 939                                         while (surf < endsurf);
 940                                 }
 941                         }
 942                 }
 943
 944         // recurse down the back side
 945                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 946                 {
 947                         node = node->children[side];
 948                         continue;
 949                 }
 950
 951                 if (nstack <= nodestack)
 952                         break;
 953                 nstack--;
 954                 node = nstack->node;
 955                 side = nstack->side;
 956                 goto loc0;
 957         }
 958 }
 959
 960
 961 /*
 962 =============
 963 R_DrawWorld
 964 =============
 965 */
 966 void R_DrawWorld (void)
 967 {
 968         entity_t        ent;
 969
 970         memset (&ent, 0, sizeof(ent));
 971         ent.model = cl.worldmodel;
 972         ent.colormod[0] = ent.colormod[1] = ent.colormod[2] = 1;
 973         modelalpha = ent.alpha = 1;
 974         ent.scale = 1;
 975
 976         VectorCopy (r_refdef.vieworg, modelorg);
 977
 978         currententity = &ent;
 979
 980         softwaretransformidentity(); // LordHavoc: clear transform
 981
 982         if (cl.worldmodel)
 983                 R_WorldNode ();
 984
 985         R_PushDlights (); // now mark the lit surfaces
 986
 987         DrawTextureChains ();
 988 }
 989
 990
 991 /*
 992 ===============
 993 R_MarkLeaves
 994 ===============
 995 */
 996 void R_MarkLeaves (void)
 997 {
 998         byte    *vis;
 999         mnode_t *node;
1000         int             i;
1001
1002         if (r_oldviewleaf == r_viewleaf && !r_novis.value)
1003                 return;
1004
1005         r_visframecount++;
1006         r_oldviewleaf = r_viewleaf;
1007
1008         if (r_novis.value)
1009         {
1010                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
1011                 {
1012                         node = (mnode_t *)&cl.worldmodel->leafs[i+1];
1013                         do
1014                         {
1015                                 if (node->visframe == r_visframecount)
1016                                         break;
1017                                 node->visframe = r_visframecount;
1018                                 node = node->parent;
1019                         } while (node);
1020                 }
1021         }
1022         else
1023         {
1024                 vis = Mod_LeafPVS (r_viewleaf, cl.worldmodel);
1025
1026                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
1027                 {
1028                         if (vis[i>>3] & (1<<(i&7)))
1029                         {
1030                                 node = (mnode_t *)&cl.worldmodel->leafs[i+1];
1031                                 do
1032                                 {
1033                                         if (node->visframe == r_visframecount)
1034                                                 break;
1035                                         node->visframe = r_visframecount;
1036                                         node = node->parent;
1037                                 } while (node);
1038                         }
1039                 }
1040         }
1041 }
1042
1043
1044
1045 /*
1046 =============================================================================
1047
1048   LIGHTMAP ALLOCATION
1049
1050 =============================================================================
1051 */
1052
1053 // returns a texture number and the position inside it
1054 int AllocBlock (int w, int h, short *x, short *y)
1055 {
1056         int             i, j;
1057         int             best, best2;
1058         int             texnum;
1059
1060         for (texnum=0 ; texnum<MAX_LIGHTMAPS ; texnum++)
1061         {
1062                 best = BLOCK_HEIGHT;
1063
1064                 for (i=0 ; i<BLOCK_WIDTH-w ; i+=lightmapalign) // LordHavoc: NVIDIA has broken subimage, so align the lightmaps
1065                 {
1066                         best2 = 0;
1067
1068                         for (j=0 ; j<w ; j++)
1069                         {
1070                                 if (allocated[texnum][i+j] >= best)
1071                                         break;
1072                                 if (allocated[texnum][i+j] > best2)
1073                                         best2 = allocated[texnum][i+j];
1074                         }
1075                         if (j == w)
1076                         {       // this is a valid spot
1077                                 *x = i;
1078                                 *y = best = best2;
1079                         }
1080                 }
1081
1082                 if (best + h > BLOCK_HEIGHT)
1083                         continue;
1084
1085                 if (nosubimagefragments || nosubimage)
1086                 {
1087                         if (!lightmaps[texnum])
1088                                 lightmaps[texnum] = calloc(BLOCK_WIDTH*BLOCK_HEIGHT*4, 1);
1089                 }
1090                 // LordHavoc: clear texture to blank image, fragments are uploaded using subimage
1091                 else if (!allocated[texnum][0])
1092                 {
1093                         byte blank[BLOCK_WIDTH*BLOCK_HEIGHT*3];
1094                         memset(blank, 0, sizeof(blank));
1095                         if(r_upload.value)
1096                         {
1097                                 glBindTexture(GL_TEXTURE_2D, lightmap_textures + texnum);
1098                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1099                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1100                                 if (lightmaprgba)
1101                                         glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, blank);
1102                                 else
1103                                         glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, blank);
1104                         }
1105                 }
1106
1107                 for (i=0 ; i<w ; i++)
1108                         allocated[texnum][*x + i] = best + h;
1109
1110                 return texnum;
1111         }
1112
1113         Sys_Error ("AllocBlock: full");
1114         return 0;
1115 }
1116
1117
1118 mvertex_t       *r_pcurrentvertbase;
1119 model_t         *currentmodel;
1120
1121 int     nColinElim;
1122
1123 /*
1124 ================
1125 BuildSurfaceDisplayList
1126 ================
1127 */
1128 void BuildSurfaceDisplayList (msurface_t *fa)
1129 {
1130         int                     i, j, lindex, lnumverts;
1131         medge_t         *pedges, *r_pedge;
1132         int                     vertpage;
1133         float           *vec;
1134         float           s, t;
1135         glpoly_t        *poly;
1136
1137 // reconstruct the polygon
1138         pedges = currentmodel->edges;
1139         lnumverts = fa->numedges;
1140         vertpage = 0;
1141
1142         //
1143         // draw texture
1144         //
1145         poly = Hunk_Alloc (sizeof(glpoly_t) + (lnumverts-4) * VERTEXSIZE*sizeof(float));
1146         poly->next = fa->polys;
1147         poly->flags = fa->flags;
1148         fa->polys = poly;
1149         poly->numverts = lnumverts;
1150
1151         for (i=0 ; i<lnumverts ; i++)
1152         {
1153                 lindex = currentmodel->surfedges[fa->firstedge + i];
1154
1155                 if (lindex > 0)
1156                 {
1157                         r_pedge = &pedges[lindex];
1158                         vec = r_pcurrentvertbase[r_pedge->v[0]].position;
1159                 }
1160                 else
1161                 {
1162                         r_pedge = &pedges[-lindex];
1163                         vec = r_pcurrentvertbase[r_pedge->v[1]].position;
1164                 }
1165                 s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
1166                 t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
1167
1168                 VectorCopy (vec, poly->verts[i]);
1169                 poly->verts[i][3] = s / fa->texinfo->texture->width;
1170                 poly->verts[i][4] = t / fa->texinfo->texture->height;
1171
1172                 //
1173                 // lightmap texture coordinates
1174                 //
1175                 s -= fa->texturemins[0];
1176                 t -= fa->texturemins[1];
1177                 s += 8;
1178                 t += 8;
1179                 // LordHavoc: calc lightmap data offset
1180                 j = (bound(0l, (int)t>>4, fa->extents[1]>>4) * ((fa->extents[0]>>4)+1) + bound(0l, (int)s>>4, fa->extents[0]>>4)) * 3;
1181                 poly->verts[i][7] = j;
1182                 s += fa->light_s*16;
1183                 s /= BLOCK_WIDTH*16; //fa->texinfo->texture->width;
1184
1185                 t += fa->light_t*16;
1186                 t /= BLOCK_HEIGHT*16; //fa->texinfo->texture->height;
1187
1188                 poly->verts[i][5] = s;
1189                 poly->verts[i][6] = t;
1190         }
1191
1192         //
1193         // remove co-linear points - Ed
1194         //
1195         /*
1196         if (!gl_keeptjunctions.value)
1197         {
1198                 for (i = 0 ; i < lnumverts ; ++i)
1199                 {
1200                         vec3_t v1, v2;
1201                         float *prev, *this, *next;
1202
1203                         prev = poly->verts[(i + lnumverts - 1) % lnumverts];
1204                         this = poly->verts[i];
1205                         next = poly->verts[(i + 1) % lnumverts];
1206
1207                         VectorSubtract( this, prev, v1 );
1208                         VectorNormalize( v1 );
1209                         VectorSubtract( next, prev, v2 );
1210                         VectorNormalize( v2 );
1211
1212                         // skip co-linear points
1213                         #define COLINEAR_EPSILON 0.001
1214                         if ((fabs( v1[0] - v2[0] ) <= COLINEAR_EPSILON) &&
1215                                 (fabs( v1[1] - v2[1] ) <= COLINEAR_EPSILON) &&
1216                                 (fabs( v1[2] - v2[2] ) <= COLINEAR_EPSILON))
1217                         {
1218                                 int j;
1219                                 for (j = i + 1; j < lnumverts; ++j)
1220                                 {
1221                                         int k;
1222                                         for (k = 0; k < VERTEXSIZE; ++k)
1223                                                 poly->verts[j - 1][k] = poly->verts[j][k];
1224                                 }
1225                                 --lnumverts;
1226                                 ++nColinElim;
1227                                 // retry next vertex next time, which is now current vertex
1228                                 --i;
1229                         }
1230                 }
1231         }
1232         */
1233         poly->numverts = lnumverts;
1234 }
1235
1236 /*
1237 ========================
1238 GL_CreateSurfaceLightmap
1239 ========================
1240 */
1241 void GL_CreateSurfaceLightmap (msurface_t *surf)
1242 {
1243         int             smax, tmax;
1244
1245         if (surf->flags & (SURF_DRAWSKY|SURF_DRAWTURB))
1246                 return;
1247
1248         smax = (surf->extents[0]>>4)+1;
1249         tmax = (surf->extents[1]>>4)+1;
1250
1251         surf->lightmaptexturenum = AllocBlock (smax, tmax, &surf->light_s, &surf->light_t);
1252         if (nosubimage || nosubimagefragments)
1253                 return;
1254         glBindTexture(GL_TEXTURE_2D, lightmap_textures + surf->lightmaptexturenum);
1255         smax = ((surf->extents[0]>>4)+lightmapalign) & lightmapalignmask;
1256         if (lightmaprgba)
1257         {
1258                 R_BuildLightMap (surf, templight, smax * 4);
1259                 if(r_upload.value)
1260                         glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
1261         }
1262         else
1263         {
1264                 R_BuildLightMap (surf, templight, smax * 3);
1265                 if(r_upload.value)
1266                         glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
1267         }
1268 }
1269
1270
1271 /*
1272 ==================
1273 GL_BuildLightmaps
1274
1275 Builds the lightmap texture
1276 with all the surfaces from all brush models
1277 ==================
1278 */
1279 void GL_BuildLightmaps (void)
1280 {
1281         int             i, j;
1282         model_t *m;
1283
1284         memset (allocated, 0, sizeof(allocated));
1285
1286         r_framecount = 1;               // no dlightcache
1287
1288         if (gl_nosubimagefragments.value)
1289                 nosubimagefragments = 1;
1290         else
1291                 nosubimagefragments = 0;
1292
1293         if (gl_nosubimage.value)
1294                 nosubimage = 1;
1295         else
1296                 nosubimage = 0;
1297
1298         if (gl_lightmaprgba.value)
1299         {
1300                 lightmaprgba = true;
1301                 lightmapbytes = 4;
1302         }
1303         else
1304         {
1305                 lightmaprgba = false;
1306                 lightmapbytes = 3;
1307         }
1308
1309         // LordHavoc: NVIDIA seems to have a broken glTexSubImage2D,
1310         //            it needs to be aligned on 4 pixel boundaries...
1311         //            so I implemented an adjustable lightmap alignment
1312         if (gl_lightmapalign.value < 1)
1313                 gl_lightmapalign.value = 1;
1314         if (gl_lightmapalign.value > 16)
1315                 gl_lightmapalign.value = 16;
1316         lightmapalign = 1;
1317         while (lightmapalign < gl_lightmapalign.value)
1318                 lightmapalign <<= 1;
1319         gl_lightmapalign.value = lightmapalign;
1320         lightmapalignmask = ~(lightmapalign - 1);
1321         if (nosubimagefragments || nosubimage)
1322         {
1323                 lightmapalign = 1;
1324                 lightmapalignmask = ~0;
1325         }
1326
1327         if (!lightmap_textures)
1328         {
1329                 lightmap_textures = texture_extension_number;
1330                 texture_extension_number += MAX_LIGHTMAPS;
1331         }
1332
1333         for (j=1 ; j<MAX_MODELS ; j++)
1334         {
1335                 m = cl.model_precache[j];
1336                 if (!m)
1337                         break;
1338                 if (m->name[0] == '*')
1339                         continue;
1340                 r_pcurrentvertbase = m->vertexes;
1341                 currentmodel = m;
1342                 for (i=0 ; i<m->numsurfaces ; i++)
1343                 {
1344                         if ( m->surfaces[i].flags & SURF_DRAWTURB )
1345                                 continue;
1346                         if ( m->surfaces[i].flags & SURF_DRAWSKY )
1347                                 continue;
1348                         GL_CreateSurfaceLightmap (m->surfaces + i);
1349                         BuildSurfaceDisplayList (m->surfaces + i);
1350                 }
1351         }
1352
1353         if (nosubimage || nosubimagefragments)
1354         {
1355                 if(r_upload.value)
1356                         if (gl_mtexable)
1357                                 qglSelectTexture(gl_mtex_enum+1);
1358                 for (i = 0;i < MAX_LIGHTMAPS;i++)
1359                 {
1360                         if (!allocated[i][0])
1361                                 break;
1362                         lightmapupdate[i][0] = BLOCK_HEIGHT;
1363                         lightmapupdate[i][1] = 0;
1364                         if(r_upload.value)
1365                         {
1366                                 glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
1367                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1368                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1369                                 if (lightmaprgba)
1370                                         glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
1371                                 else
1372                                         glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
1373                         }
1374                 }
1375                 if(r_upload.value)
1376                         if (gl_mtexable)
1377                                 qglSelectTexture(gl_mtex_enum+0);
1378         }
1379 }
1380