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;
  55 int lightmapbytes;
  56
  57 qboolean skyisvisible;
  58 extern qboolean gl_arrays;
  59
  60 extern int r_dlightframecount;
  61
  62 void glrsurf_init()
  63 {
  64         int i;
  65         for (i = 0;i < MAX_LIGHTMAPS;i++)
  66                 lightmaps[i] = NULL;
  67         Cvar_RegisterVariable(&gl_lightmapalign);
  68         Cvar_RegisterVariable(&gl_lightmaprgba);
  69         Cvar_RegisterVariable(&gl_nosubimagefragments);
  70         Cvar_RegisterVariable(&gl_nosubimage);
  71         Cvar_RegisterVariable(&r_ambient);
  72 //      Cvar_RegisterVariable(&gl_funnywalls);
  73         Cvar_RegisterVariable(&gl_vertex);
  74         Cvar_RegisterVariable(&gl_texsort);
  75         // check if it's the glquake minigl driver
  76         if (strncasecmp(gl_vendor,"3Dfx",4)==0)
  77         if (!gl_arrays)
  78         {
  79 //              Cvar_SetValue("gl_nosubimagefragments", 1);
  80 //              Cvar_SetValue("gl_nosubimage", 1);
  81                 Cvar_SetValue("gl_lightmode", 0);
  82         }
  83 }
  84
  85 extern qboolean lighthalf;
  86 /*
  87 ===============
  88 R_BuildLightMap
  89
  90 Combine and scale multiple lightmaps into the 8.8 format in blocklights
  91 ===============
  92 */
  93 void R_BuildLightMap (msurface_t *surf, byte *dest, int stride)
  94 {
  95         int                     smax, tmax;
  96         int                     t;
  97         int                     i, j, size;
  98         byte            *lightmap;
  99         int                     scale;
 100         int                     maps;
 101         int                     *bl;
 102
 103         surf->cached_lighthalf = lighthalf;
 104         surf->cached_ambient = r_ambient.value;
 105
 106         smax = (surf->extents[0]>>4)+1;
 107         tmax = (surf->extents[1]>>4)+1;
 108         size = smax*tmax;
 109         lightmap = surf->samples;
 110
 111 // set to full bright if no light data
 112         if (currententity->effects & EF_FULLBRIGHT || !cl.worldmodel->lightdata)
 113         {
 114                 bl = blocklights;
 115                 for (i=0 ; i<size ; i++)
 116                 {
 117                         *bl++ = 255*256;
 118                         *bl++ = 255*256;
 119                         *bl++ = 255*256;
 120                 }
 121         }
 122         else
 123         {
 124 // clear to no light
 125                 bl = blocklights;
 126                 j = r_ambient.value * 512.0f; // would be 256.0f logically, but using 512.0f to match winquake style
 127                 for (i=0 ; i<size ; i++)
 128                 {
 129                         *bl++ = j;
 130                         *bl++ = j;
 131                         *bl++ = j;
 132                 }
 133
 134 // add all the lightmaps
 135                 if (lightmap)
 136                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++)
 137                         {
 138                                 scale = d_lightstylevalue[surf->styles[maps]];
 139                                 surf->cached_light[maps] = scale;       // 8.8 fraction
 140                                 bl = blocklights;
 141                                 for (i=0 ; i<size ; i++)
 142                                 {
 143                                         *bl++ += *lightmap++ * scale;
 144                                         *bl++ += *lightmap++ * scale;
 145                                         *bl++ += *lightmap++ * scale;
 146                                 }
 147                         }
 148         }
 149         stride -= (smax*lightmapbytes);
 150         bl = blocklights;
 151         if (lighthalf)
 152         {
 153                 // LordHavoc: I shift down by 8 unlike GLQuake's 7,
 154                 // the image is brightened as a processing pass
 155                 if (lightmaprgba)
 156                 {
 157                         for (i=0 ; i<tmax ; i++, dest += stride)
 158                         {
 159                                 for (j=0 ; j<smax ; j++)
 160                                 {
 161                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 162                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 163                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 164                                         *dest++ = 255;
 165                                 }
 166                         }
 167                 }
 168                 else
 169                 {
 170                         for (i=0 ; i<tmax ; i++, dest += stride)
 171                         {
 172                                 for (j=0 ; j<smax ; j++)
 173                                 {
 174                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 175                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 176                                         t = *bl++ >> 8;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 177                                 }
 178                         }
 179                 }
 180         }
 181         else
 182         {
 183                 if (lightmaprgba)
 184                 {
 185                         for (i=0 ; i<tmax ; i++, dest += stride)
 186                         {
 187                                 for (j=0 ; j<smax ; j++)
 188                                 {
 189                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 190                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 191                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 192                                         *dest++ = 255;
 193                                 }
 194                         }
 195                 }
 196                 else
 197                 {
 198                         for (i=0 ; i<tmax ; i++, dest += stride)
 199                         {
 200                                 for (j=0 ; j<smax ; j++)
 201                                 {
 202                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 203                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 204                                         t = *bl++ >> 7;if (t > 255) t = 255;else if (t < 0) t = 0;*dest++ = t;
 205                                 }
 206                         }
 207                 }
 208         }
 209 }
 210
 211 byte templight[32*32*4];
 212
 213 void R_UpdateLightmap(msurface_t *s, int lnum)
 214 {
 215         int smax, tmax;
 216         // upload the new lightmap texture fragment
 217         glBindTexture(GL_TEXTURE_2D, lightmap_textures + lnum);
 218         if (nosubimage || nosubimagefragments)
 219         {
 220                 if (lightmapupdate[lnum][0] > s->light_t)
 221                         lightmapupdate[lnum][0] = s->light_t;
 222                 if (lightmapupdate[lnum][1] < (s->light_t + ((s->extents[1]>>4)+1)))
 223                         lightmapupdate[lnum][1] = (s->light_t + ((s->extents[1]>>4)+1));
 224                 if (lightmaprgba)
 225                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 4, BLOCK_WIDTH * 4);
 226                 else
 227                         R_BuildLightMap (s, lightmaps[s->lightmaptexturenum] + (s->light_t * BLOCK_WIDTH + s->light_s) * 3, BLOCK_WIDTH * 3);
 228         }
 229         else
 230         {
 231                 smax = ((s->extents[0]>>4)+lightmapalign) & lightmapalignmask;
 232                 tmax = (s->extents[1]>>4)+1;
 233                 if (lightmaprgba)
 234                 {
 235                         R_BuildLightMap (s, templight, smax * 4);
 236                         glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
 237                 }
 238                 else
 239                 {
 240                         R_BuildLightMap (s, templight, smax * 3);
 241                         glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
 242                 }
 243         }
 244 }
 245
 246
 247 /*
 248 ===============
 249 R_TextureAnimation
 250
 251 Returns the proper texture for a given time and base texture
 252 ===============
 253 */
 254 texture_t *R_TextureAnimation (texture_t *base)
 255 {
 256         texture_t *original;
 257         int             relative;
 258         int             count;
 259
 260         if (currententity->frame)
 261         {
 262                 if (base->alternate_anims)
 263                         base = base->alternate_anims;
 264         }
 265
 266         if (!base->anim_total)
 267                 return base;
 268
 269         original = base;
 270
 271         relative = (int)(cl.time*10) % base->anim_total;
 272
 273         count = 0;
 274         while (base->anim_min > relative || base->anim_max <= relative)
 275         {
 276                 base = base->anim_next;
 277                 if (!base)
 278                 {
 279                         Con_Printf("R_TextureAnimation: broken cycle");
 280                         return original;
 281                 }
 282                 if (++count > 100)
 283                 {
 284                         Con_Printf("R_TextureAnimation: infinite cycle");
 285                         return original;
 286                 }
 287         }
 288
 289         return base;
 290 }
 291
 292
 293 /*
 294 =============================================================
 295
 296         BRUSH MODELS
 297
 298 =============================================================
 299 */
 300
 301
 302 extern  int             solidskytexture;
 303 extern  int             alphaskytexture;
 304 extern  float   speedscale;             // for top sky and bottom sky
 305
 306 qboolean mtexenabled = false;
 307
 308 extern char skyname[];
 309
 310 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 311 //extern cvar_t r_dynamicwater;
 312 float   turbsin[256] =
 313 {
 314         #include "gl_warp_sin.h"
 315 };
 316 #define TURBSCALE (256.0 / (2 * M_PI))
 317
 318
 319 void UploadLightmaps()
 320 {
 321         int i;
 322         if (nosubimage || nosubimagefragments)
 323         {
 324                 for (i = 0;i < MAX_LIGHTMAPS;i++)
 325                 {
 326                         if (lightmapupdate[i][0] < lightmapupdate[i][1])
 327                         {
 328                                 glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
 329                                 if (nosubimage)
 330                                 {
 331                                         if (lightmaprgba)
 332                                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
 333                                         else
 334                                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
 335                                 }
 336                                 else
 337                                 {
 338                                         if (lightmaprgba)
 339                                                 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]));
 340                                         else
 341                                                 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]));
 342                                 }
 343                         }
 344                         lightmapupdate[i][0] = BLOCK_HEIGHT;
 345                         lightmapupdate[i][1] = 0;
 346                 }
 347         }
 348 }
 349
 350 void R_SkySurf(msurface_t *s, qboolean transform)
 351 {
 352         glpoly_t *p;
 353         int i;
 354         float *v;
 355         for (p=s->polys ; p ; p=p->next)
 356         {
 357                 if (currentskypoly < MAX_SKYPOLYS && currentskyvert + p->numverts <= MAX_SKYVERTS)
 358                 {
 359                         skypoly[currentskypoly].firstvert = currentskyvert;
 360                         skypoly[currentskypoly++].verts = p->numverts;
 361                         if (transform)
 362                         {
 363                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 364                                 {
 365                                         softwaretransform(v, skyvert[currentskyvert].v);
 366                                         currentskyvert++;
 367                                 }
 368                         }
 369                         else
 370                         {
 371                                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 372                                 {
 373                                         skyvert[currentskyvert].v[0] = v[0];
 374                                         skyvert[currentskyvert].v[1] = v[1];
 375                                         skyvert[currentskyvert++].v[2] = v[2];
 376                                 }
 377                         }
 378                 }
 379         }
 380 }
 381
 382 void R_LightSurface(int *dlightbits, glpoly_t *polys, float *wvert)
 383 {
 384         float           cr, cg, cb, radius, radius2, f, *v, *wv;
 385         int                     i, a, b;
 386         unsigned int c;
 387         dlight_t        *light;
 388         vec_t           *lightorigin;
 389         glpoly_t        *p;
 390         for (a = 0;a < 8;a++)
 391         {
 392                 if ((c = dlightbits[a]))
 393                 {
 394                         for (b = 0;c && b < 32;b++)
 395                         {
 396                                 if (c & (1 << b))
 397                                 {
 398                                         c -= (1 << b);
 399                                         light = &cl_dlights[a * 32 + b];
 400                                         lightorigin = light->origin;
 401                                         cr = light->color[0];
 402                                         cg = light->color[1];
 403                                         cb = light->color[2];
 404                                         radius = light->radius*light->radius*16.0f;
 405                                         radius2 = radius * 16.0f;
 406                                         wv = wvert;
 407                                         for (p = polys;p;p = p->next)
 408                                         {
 409                                                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 410                                                 {
 411                                                         f = VectorDistance2(wv, lightorigin);
 412                                                         if (f < radius)
 413                                                         {
 414                                                                 f = radius2 / (f + 65536.0f);
 415                                                                 wv[3] += cr * f;
 416                                                                 wv[4] += cg * f;
 417                                                                 wv[5] += cb * f;
 418                                                         }
 419                                                         wv += 6;
 420                                                 }
 421                                         }
 422                                 }
 423                                 c >>= 1;
 424                                 b++;
 425                         }
 426                 }
 427         }
 428 }
 429
 430 void R_WaterSurf(msurface_t *s, texture_t *t, qboolean transform, int alpha)
 431 {
 432         int             i;
 433         float   os = turbsin[(int)(realtime * TURBSCALE) & 255], ot = turbsin[(int)(realtime * TURBSCALE + 96.0) & 255];
 434         glpoly_t *p;
 435         float   wvert[1024*6], *wv, *v;
 436         wv = wvert;
 437         for (p = s->polys;p;p = p->next)
 438         {
 439                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 440                 {
 441                         if (transform)
 442                                 softwaretransform(v, wv);
 443                         else
 444                                 VectorCopy(v, wv);
 445                         if (r_waterripple.value)
 446                                 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);
 447                         wv[3] = wv[4] = wv[5] = 128.0f;
 448                         wv += 6;
 449                 }
 450         }
 451         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 452                 R_LightSurface(s->dlightbits, s->polys, wvert);
 453         wv = wvert;
 454         // FIXME: make fog texture if water texture is transparent?
 455         for (p=s->polys ; p ; p=p->next)
 456         {
 457                 transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, TPOLYTYPE_ALPHA);
 458                 for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 459                         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);
 460                 transpolyend();
 461         }
 462 }
 463
 464 void R_WallSurf(msurface_t *s, texture_t *t, qboolean transform)
 465 {
 466         int                     i;
 467         glpoly_t        *p;
 468         float           wvert[64*6], *wv, *v;
 469         // check for lightmap modification
 470         if (r_dynamic.value)
 471         {
 472                 if (r_ambient.value != s->cached_ambient || lighthalf != s->cached_lighthalf
 473                 || (s->styles[0] != 255 && d_lightstylevalue[s->styles[0]] != s->cached_light[0])
 474                 || (s->styles[1] != 255 && d_lightstylevalue[s->styles[1]] != s->cached_light[1])
 475                 || (s->styles[2] != 255 && d_lightstylevalue[s->styles[2]] != s->cached_light[2])
 476                 || (s->styles[3] != 255 && d_lightstylevalue[s->styles[3]] != s->cached_light[3]))
 477                         R_UpdateLightmap(s, s->lightmaptexturenum);
 478         }
 479         wv = wvert;
 480         for (p = s->polys;p;p = p->next)
 481         {
 482                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 483                 {
 484                         if (transform)
 485                                 softwaretransform(v, wv);
 486                         else
 487                                 VectorCopy(v, wv);
 488                         wv[3] = wv[4] = wv[5] = 0.0f;
 489                         wv += 6;
 490                 }
 491         }
 492         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 493                 R_LightSurface(s->dlightbits, s->polys, wvert);
 494         wv = wvert;
 495         for (p = s->polys;p;p = p->next)
 496         {
 497                 if (currentwallpoly >= MAX_WALLPOLYS)
 498                         break;
 499                 v = p->verts[0];
 500                 wallpoly[currentwallpoly].texnum = (unsigned short) t->gl_texturenum;
 501                 wallpoly[currentwallpoly].lighttexnum = (unsigned short) lightmap_textures + s->lightmaptexturenum;
 502                 wallpoly[currentwallpoly].glowtexnum = (unsigned short) t->gl_glowtexturenum;
 503                 wallpoly[currentwallpoly].firstvert = currentwallvert;
 504                 wallpoly[currentwallpoly].numverts = p->numverts;
 505                 wallpoly[currentwallpoly++].lit = true;
 506                 for (i = 0;i<p->numverts;i++, v += VERTEXSIZE)
 507                 {
 508                         if (lighthalf)
 509                         {
 510                                 wallvert[currentwallvert].r = (byte) (bound(0, (int) wv[3] >> 1, 255));
 511                                 wallvert[currentwallvert].g = (byte) (bound(0, (int) wv[4] >> 1, 255));
 512                                 wallvert[currentwallvert].b = (byte) (bound(0, (int) wv[5] >> 1, 255));
 513                                 wallvert[currentwallvert].a = 255;
 514                         }
 515                         else
 516                         {
 517                                 wallvert[currentwallvert].r = (byte) (bound(0, (int) wv[3], 255));
 518                                 wallvert[currentwallvert].g = (byte) (bound(0, (int) wv[4], 255));
 519                                 wallvert[currentwallvert].b = (byte) (bound(0, (int) wv[5], 255));
 520                                 wallvert[currentwallvert].a = 255;
 521                         }
 522                         wallvert[currentwallvert].vert[0] = wv[0];
 523                         wallvert[currentwallvert].vert[1] = wv[1];
 524                         wallvert[currentwallvert].vert[2] = wv[2];
 525                         wallvert[currentwallvert].s = v[3];
 526                         wallvert[currentwallvert].t = v[4];
 527                         wallvert[currentwallvert].u = v[5];
 528                         wallvert[currentwallvert++].v = v[6];
 529                         wv += 6;
 530                 }
 531         }
 532 }
 533
 534 // LordHavoc: transparent brush models
 535 extern int r_dlightframecount;
 536 extern float modelalpha;
 537 //extern vec3_t shadecolor;
 538 //qboolean R_CullBox (vec3_t mins, vec3_t maxs);
 539 //void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 540 //void R_DynamicLightPointNoMask(vec3_t color, vec3_t org);
 541 //void EmitWaterPolys (msurface_t *fa);
 542
 543 void R_WallSurfVertex(msurface_t *s, texture_t *t, qboolean transform, qboolean isbmodel)
 544 {
 545         int                     i, alpha;
 546         glpoly_t        *p;
 547         float           wvert[64*6], *wv, *v;
 548         int                     size3;
 549         float           scale;
 550         byte            *lm;
 551         size3 = ((s->extents[0]>>4)+1)*((s->extents[1]>>4)+1)*3; // *3 for colored lighting
 552         alpha = (int) (modelalpha * 255.0f);
 553         // check for lightmap modification
 554         if (r_dynamic.value)
 555         {
 556                 if (r_ambient.value != s->cached_ambient || lighthalf != s->cached_lighthalf
 557                 || (s->styles[0] != 255 && d_lightstylevalue[s->styles[0]] != s->cached_light[0])
 558                 || (s->styles[1] != 255 && d_lightstylevalue[s->styles[1]] != s->cached_light[1])
 559                 || (s->styles[2] != 255 && d_lightstylevalue[s->styles[2]] != s->cached_light[2])
 560                 || (s->styles[3] != 255 && d_lightstylevalue[s->styles[3]] != s->cached_light[3]))
 561                         R_UpdateLightmap(s, s->lightmaptexturenum);
 562         }
 563         wv = wvert;
 564         for (p = s->polys;p;p = p->next)
 565         {
 566                 for (i = 0, v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE)
 567                 {
 568                         if (transform)
 569                                 softwaretransform(v, wv);
 570                         else
 571                                 VectorCopy(v, wv);
 572                         wv[3] = wv[4] = wv[5] = r_ambient.value * 2.0f;
 573                         if (s->styles[0] != 255)
 574                         {
 575                                 lm = (byte *)((long) s->samples + (int) v[7]);
 576                                 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;
 577                                 if (s->styles[1] != 255)
 578                                 {
 579                                         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;
 580                                         if (s->styles[2] != 255)
 581                                         {
 582                                                 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;
 583                                                 if (s->styles[3] != 255)
 584                                                 {
 585                                                         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;
 586                                                 }
 587                                         }
 588                                 }
 589                         }
 590                         wv += 6;
 591                 }
 592         }
 593         if (s->dlightframe == r_dlightframecount && r_dynamic.value)
 594                 R_LightSurface(s->dlightbits, s->polys, wvert);
 595         wv = wvert;
 596         if (isbmodel && (currententity->colormod[0] != 1 || currententity->colormod[1] != 1 || currententity->colormod[2] != 1))
 597         {
 598                 for (p = s->polys;p;p = p->next)
 599                 {
 600                         v = p->verts[0];
 601                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 602                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 603                                 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);
 604                         transpolyend();
 605                 }
 606         }
 607         else
 608         {
 609                 for (p = s->polys;p;p = p->next)
 610                 {
 611                         v = p->verts[0];
 612                         transpolybegin(t->gl_texturenum, t->gl_glowtexturenum, 0, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 613                         for (i = 0,v = p->verts[0];i < p->numverts;i++, v += VERTEXSIZE, wv += 6)
 614                                 transpolyvert(wv[0], wv[1], wv[2], v[3], v[4], wv[3], wv[4], wv[5], alpha);
 615                         transpolyend();
 616                 }
 617         }
 618 }
 619
 620 /*
 621 ================
 622 DrawTextureChains
 623 ================
 624 */
 625 extern qboolean hlbsp;
 626 extern char skyname[];
 627 //extern qboolean SV_TestLine (hull_t *hull, int num, vec3_t p1, vec3_t p2);
 628 void R_DrawSurf(msurface_t *s, qboolean isbmodel, qboolean vertexlit)
 629 {
 630         texture_t *t;
 631         if (s->flags & SURF_DRAWSKY)
 632         {
 633                 skyisvisible = true;
 634                 if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
 635                         R_SkySurf(s, false);
 636                 return;
 637         }
 638         t = R_TextureAnimation (s->texinfo->texture);
 639         if (s->flags & SURF_DRAWTURB)
 640         {
 641                 R_WaterSurf(s, t, false, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
 642                 return;
 643         }
 644         if (vertexlit)
 645                 R_WallSurfVertex(s, t, false, false);
 646         else
 647                 R_WallSurf(s, t, false);
 648 }
 649
 650 void DrawTextureChains (void)
 651 {
 652         int                     n;
 653         msurface_t      *s;
 654         texture_t       *t;
 655
 656         for (n = 0;n < cl.worldmodel->numtextures;n++)
 657         {
 658                 if (!cl.worldmodel->textures[n] || !(s = cl.worldmodel->textures[n]->texturechain))
 659                         continue;
 660                 cl.worldmodel->textures[n]->texturechain = NULL;
 661 //              for (;s;s = s->texturechain)
 662 //                      R_DrawSurf(s, false, gl_vertex.value);
 663                 // LordHavoc: decide the render type only once, because the surface properties were determined by texture anyway
 664                 // sky
 665                 if (s->flags & SURF_DRAWSKY)
 666                 {
 667                         skyisvisible = true;
 668                         if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
 669                                 for (;s;s = s->texturechain)
 670                                         R_SkySurf(s, false);
 671                         continue;
 672                 }
 673                 t = R_TextureAnimation (cl.worldmodel->textures[n]);
 674                 // subdivided water surface warp
 675                 if (s->flags & SURF_DRAWTURB)
 676                 {
 677                         int alpha = s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f;
 678                         for (;s;s = s->texturechain)
 679                                 R_WaterSurf(s, t, false, alpha);
 680                         continue;
 681                 }
 682                 if (gl_vertex.value)
 683                         for (;s;s = s->texturechain)
 684                                 R_WallSurfVertex(s, t, false, false);
 685                 else
 686                         for (;s;s = s->texturechain)
 687                                 R_WallSurf(s, t, false);
 688         }
 689 }
 690
 691 void R_NoVisMarkLights (vec3_t lightorigin, dlight_t *light, int bit, int bitindex, model_t *model);
 692
 693 /*
 694 =================
 695 R_DrawBrushModel
 696 =================
 697 */
 698 void R_DrawBrushModel (entity_t *e)
 699 {
 700         int                     i;
 701         vec3_t          mins, maxs;
 702         msurface_t      *s;
 703         model_t         *clmodel;
 704         qboolean        rotated, vertexlit = false;
 705         texture_t       *t;
 706         vec3_t          org;
 707
 708         currententity = e;
 709
 710         clmodel = e->model;
 711
 712         if (e->angles[0] || e->angles[1] || e->angles[2])
 713         {
 714                 rotated = true;
 715                 for (i=0 ; i<3 ; i++)
 716                 {
 717                         mins[i] = e->origin[i] - clmodel->radius;
 718                         maxs[i] = e->origin[i] + clmodel->radius;
 719                 }
 720         }
 721         else
 722         {
 723                 rotated = false;
 724                 VectorAdd (e->origin, clmodel->mins, mins);
 725                 VectorAdd (e->origin, clmodel->maxs, maxs);
 726         }
 727
 728         if (R_CullBox (mins, maxs))
 729                 return;
 730
 731         VectorSubtract (r_refdef.vieworg, e->origin, modelorg);
 732         if (rotated)
 733         {
 734                 vec3_t  temp;
 735                 vec3_t  forward, right, up;
 736
 737                 VectorCopy (modelorg, temp);
 738                 AngleVectors (e->angles, forward, right, up);
 739                 modelorg[0] = DotProduct (temp, forward);
 740                 modelorg[1] = -DotProduct (temp, right);
 741                 modelorg[2] = DotProduct (temp, up);
 742         }
 743
 744         s = &clmodel->surfaces[clmodel->firstmodelsurface];
 745
 746 // calculate dynamic lighting for bmodel if it's not an
 747 // instanced model
 748         for (i = 0;i < MAX_DLIGHTS;i++)
 749         {
 750                 if ((cl_dlights[i].die < cl.time) || (!cl_dlights[i].radius))
 751                         continue;
 752
 753                 VectorSubtract(cl_dlights[i].origin, currententity->origin, org);
 754                 R_NoVisMarkLights (org, &cl_dlights[i], 1<<(i&31), i >> 5, clmodel);
 755         }
 756         vertexlit = modelalpha != 1 || clmodel->firstmodelsurface == 0 || (currententity->effects & EF_FULLBRIGHT) || currententity->colormod[0] != 1 || currententity->colormod[2] != 1 || currententity->colormod[2] != 1;
 757
 758 e->angles[0] = -e->angles[0];   // stupid quake bug
 759         softwaretransformforentity (e);
 760 e->angles[0] = -e->angles[0];   // stupid quake bug
 761
 762         // draw texture
 763         for (i = 0;i < clmodel->nummodelsurfaces;i++, s++)
 764         {
 765                 if (((s->flags & SURF_PLANEBACK) == 0) == (PlaneDiff(modelorg, s->plane) >= 0))
 766                 {
 767 //                      R_DrawSurf(s, true, vertexlit || s->texinfo->texture->transparent);
 768                         if (s->flags & SURF_DRAWSKY)
 769                         {
 770                                 R_SkySurf(s, true);
 771                                 continue;
 772                         }
 773                         t = R_TextureAnimation (s->texinfo->texture);
 774                         if (s->flags & SURF_DRAWTURB)
 775                         {
 776                                 R_WaterSurf(s, t, true, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
 777                                 continue;
 778                         }
 779                         if (vertexlit || s->texinfo->texture->transparent)
 780                                 R_WallSurfVertex(s, t, true, true);
 781                         else
 782                                 R_WallSurf(s, t, true);
 783                 }
 784         }
 785         UploadLightmaps();
 786 }
 787
 788 /*
 789 =============================================================
 790
 791         WORLD MODEL
 792
 793 =============================================================
 794 */
 795
 796 void R_StoreEfrags (efrag_t **ppefrag);
 797
 798 /*
 799 ================
 800 R_WorldNode
 801 ================
 802 */
 803 void R_WorldNode ()
 804 {
 805         int             c, side, s = 0;
 806         double  dot;
 807         struct
 808         {
 809                 double dot;
 810                 mnode_t *node;
 811         } nodestack[8192];
 812         mnode_t *node;
 813
 814         if (!(node = cl.worldmodel->nodes))
 815                 return;
 816
 817         while(1)
 818         {
 819         // if a leaf node, draw stuff
 820                 if (node->contents < 0)
 821                 {
 822                         if (node->contents != CONTENTS_SOLID)
 823                         {
 824                                 mleaf_t         *pleaf;
 825                                 pleaf = (mleaf_t *)node;
 826
 827                                 c_leafs++;
 828                                 if ((c = pleaf->nummarksurfaces))
 829                                 {
 830                                         msurface_t      **mark;
 831                                         mark = pleaf->firstmarksurface;
 832                                         do
 833                                         {
 834                                                 (*mark)->visframe = r_framecount;
 835                                                 mark++;
 836                                         } while (--c);
 837                                 }
 838
 839                                 // deal with model fragments in this leaf
 840                                 if (pleaf->efrags)
 841                                         R_StoreEfrags (&pleaf->efrags);
 842                         }
 843
 844                         if (!s)
 845                                 break;
 846                         node = nodestack[--s].node;
 847                         dot = nodestack[s].dot;
 848                         goto loc0;
 849                 }
 850
 851                 c_nodes++;
 852
 853         // node is just a decision point, so go down the apropriate sides
 854
 855         // find which side of the node we are on
 856                 dot = (node->plane->type < 3 ? modelorg[node->plane->type] : DotProduct (modelorg, node->plane->normal)) - node->plane->dist;
 857
 858         // recurse down the children, front side first
 859                 side = dot < 0;
 860                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 861                 {
 862                         nodestack[s].node = node;
 863                         nodestack[s++].dot = dot;
 864                         node = node->children[side];
 865                         continue;
 866                 }
 867 loc0:
 868
 869                 // backside
 870                 side = dot >= 0;
 871         // draw stuff
 872                 if ((c = node->numsurfaces))
 873                 {
 874                         msurface_t      *surf;
 875                         surf = cl.worldmodel->surfaces + node->firstsurface;
 876
 877                         if (side)
 878                         {
 879                                 for (;c;c--, surf++)
 880                                 {
 881                                         if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
 882                                         {
 883                                                 if (gl_texsort.value)
 884                                                 {
 885                                                         surf->texturechain = surf->texinfo->texture->texturechain;
 886                                                         surf->texinfo->texture->texturechain = surf;
 887                                                 }
 888                                                 else
 889                                                         R_DrawSurf(surf, false, gl_vertex.value);
 890                                         }
 891                                 }
 892                         }
 893                         else
 894                         {
 895                                 for (;c;c--, surf++)
 896                                 {
 897                                         if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
 898                                         {
 899                                                 if (gl_texsort.value)
 900                                                 {
 901                                                         surf->texturechain = surf->texinfo->texture->texturechain;
 902                                                         surf->texinfo->texture->texturechain = surf;
 903                                                 }
 904                                                 else
 905                                                         R_DrawSurf(surf, false, gl_vertex.value);
 906                                         }
 907                                 }
 908                         }
 909                 }
 910
 911         // recurse down the back side
 912                 if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
 913                 {
 914                         node = node->children[side];
 915                         continue;
 916                 }
 917
 918                 if (!s)
 919                         break;
 920                 node = nodestack[--s].node;
 921                 dot = nodestack[s].dot;
 922                 goto loc0;
 923         }
 924 }
 925
 926
 927 /*
 928 =============
 929 R_DrawWorld
 930 =============
 931 */
 932 void R_DrawWorld (void)
 933 {
 934         entity_t        ent;
 935
 936         memset (&ent, 0, sizeof(ent));
 937         ent.model = cl.worldmodel;
 938         ent.colormod[0] = ent.colormod[1] = ent.colormod[2] = 1;
 939         modelalpha = ent.alpha = 1;
 940         ent.scale = 1;
 941
 942         VectorCopy (r_refdef.vieworg, modelorg);
 943
 944         currententity = &ent;
 945
 946         softwaretransformidentity(); // LordHavoc: clear transform
 947
 948         if (cl.worldmodel)
 949                 R_WorldNode ();
 950
 951         glClear (GL_DEPTH_BUFFER_BIT);
 952
 953         R_PushDlights (); // now mark the lit surfaces
 954
 955         DrawTextureChains ();
 956
 957         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 958         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 959 }
 960
 961
 962 /*
 963 ===============
 964 R_MarkLeaves
 965 ===============
 966 */
 967 void R_MarkLeaves (void)
 968 {
 969         byte    *vis;
 970         mnode_t *node;
 971         int             i;
 972
 973         if (r_oldviewleaf == r_viewleaf && !r_novis.value)
 974                 return;
 975
 976         r_visframecount++;
 977         r_oldviewleaf = r_viewleaf;
 978
 979         if (r_novis.value)
 980         {
 981                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
 982                 {
 983                         node = (mnode_t *)&cl.worldmodel->leafs[i+1];
 984                         do
 985                         {
 986                                 if (node->visframe == r_visframecount)
 987                                         break;
 988                                 node->visframe = r_visframecount;
 989                                 node = node->parent;
 990                         } while (node);
 991                 }
 992         }
 993         else
 994         {
 995                 vis = Mod_LeafPVS (r_viewleaf, cl.worldmodel);
 996
 997                 for (i=0 ; i<cl.worldmodel->numleafs ; i++)
 998                 {
 999                         if (vis[i>>3] & (1<<(i&7)))
1000                         {
1001                                 node = (mnode_t *)&cl.worldmodel->leafs[i+1];
1002                                 do
1003                                 {
1004                                         if (node->visframe == r_visframecount)
1005                                                 break;
1006                                         node->visframe = r_visframecount;
1007                                         node = node->parent;
1008                                 } while (node);
1009                         }
1010                 }
1011         }
1012 }
1013
1014
1015
1016 /*
1017 =============================================================================
1018
1019   LIGHTMAP ALLOCATION
1020
1021 =============================================================================
1022 */
1023
1024 // returns a texture number and the position inside it
1025 int AllocBlock (int w, int h, int *x, int *y)
1026 {
1027         int             i, j;
1028         int             best, best2;
1029         int             texnum;
1030
1031         for (texnum=0 ; texnum<MAX_LIGHTMAPS ; texnum++)
1032         {
1033                 best = BLOCK_HEIGHT;
1034
1035                 for (i=0 ; i<BLOCK_WIDTH-w ; i+=lightmapalign) // LordHavoc: NVIDIA has broken subimage, so align the lightmaps
1036                 {
1037                         best2 = 0;
1038
1039                         for (j=0 ; j<w ; j++)
1040                         {
1041                                 if (allocated[texnum][i+j] >= best)
1042                                         break;
1043                                 if (allocated[texnum][i+j] > best2)
1044                                         best2 = allocated[texnum][i+j];
1045                         }
1046                         if (j == w)
1047                         {       // this is a valid spot
1048                                 *x = i;
1049                                 *y = best = best2;
1050                         }
1051                 }
1052
1053                 if (best + h > BLOCK_HEIGHT)
1054                         continue;
1055
1056                 if (nosubimagefragments || nosubimage)
1057                 {
1058                         if (!lightmaps[texnum])
1059                                 lightmaps[texnum] = calloc(BLOCK_WIDTH*BLOCK_HEIGHT*4, 1);
1060                 }
1061                 // LordHavoc: clear texture to blank image, fragments are uploaded using subimage
1062                 else if (!allocated[texnum][0])
1063                 {
1064                         byte blank[BLOCK_WIDTH*BLOCK_HEIGHT*3];
1065                         memset(blank, 0, sizeof(blank));
1066                         glBindTexture(GL_TEXTURE_2D, lightmap_textures + texnum);
1067                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1068                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1069                         if (lightmaprgba)
1070                                 glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, blank);
1071                         else
1072                                 glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, blank);
1073                 }
1074
1075                 for (i=0 ; i<w ; i++)
1076                         allocated[texnum][*x + i] = best + h;
1077
1078                 return texnum;
1079         }
1080
1081         Sys_Error ("AllocBlock: full");
1082         return 0;
1083 }
1084
1085
1086 mvertex_t       *r_pcurrentvertbase;
1087 model_t         *currentmodel;
1088
1089 int     nColinElim;
1090
1091 /*
1092 ================
1093 BuildSurfaceDisplayList
1094 ================
1095 */
1096 void BuildSurfaceDisplayList (msurface_t *fa)
1097 {
1098         int                     i, j, lindex, lnumverts;
1099         medge_t         *pedges, *r_pedge;
1100         int                     vertpage;
1101         float           *vec;
1102         float           s, t;
1103         glpoly_t        *poly;
1104
1105 // reconstruct the polygon
1106         pedges = currentmodel->edges;
1107         lnumverts = fa->numedges;
1108         vertpage = 0;
1109
1110         //
1111         // draw texture
1112         //
1113         poly = Hunk_Alloc (sizeof(glpoly_t) + (lnumverts-4) * VERTEXSIZE*sizeof(float));
1114         poly->next = fa->polys;
1115         poly->flags = fa->flags;
1116         fa->polys = poly;
1117         poly->numverts = lnumverts;
1118
1119         for (i=0 ; i<lnumverts ; i++)
1120         {
1121                 lindex = currentmodel->surfedges[fa->firstedge + i];
1122
1123                 if (lindex > 0)
1124                 {
1125                         r_pedge = &pedges[lindex];
1126                         vec = r_pcurrentvertbase[r_pedge->v[0]].position;
1127                 }
1128                 else
1129                 {
1130                         r_pedge = &pedges[-lindex];
1131                         vec = r_pcurrentvertbase[r_pedge->v[1]].position;
1132                 }
1133                 s = DotProduct (vec, fa->texinfo->vecs[0]) + fa->texinfo->vecs[0][3];
1134                 t = DotProduct (vec, fa->texinfo->vecs[1]) + fa->texinfo->vecs[1][3];
1135
1136                 VectorCopy (vec, poly->verts[i]);
1137                 poly->verts[i][3] = s / fa->texinfo->texture->width;
1138                 poly->verts[i][4] = t / fa->texinfo->texture->height;
1139
1140                 //
1141                 // lightmap texture coordinates
1142                 //
1143                 s -= fa->texturemins[0];
1144                 t -= fa->texturemins[1];
1145                 s += 8;
1146                 t += 8;
1147                 // LordHavoc: calc lightmap data offset
1148                 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;
1149                 poly->verts[i][7] = j;
1150                 s += fa->light_s*16;
1151                 s /= BLOCK_WIDTH*16; //fa->texinfo->texture->width;
1152
1153                 t += fa->light_t*16;
1154                 t /= BLOCK_HEIGHT*16; //fa->texinfo->texture->height;
1155
1156                 poly->verts[i][5] = s;
1157                 poly->verts[i][6] = t;
1158         }
1159
1160         //
1161         // remove co-linear points - Ed
1162         //
1163         /*
1164         if (!gl_keeptjunctions.value)
1165         {
1166                 for (i = 0 ; i < lnumverts ; ++i)
1167                 {
1168                         vec3_t v1, v2;
1169                         float *prev, *this, *next;
1170
1171                         prev = poly->verts[(i + lnumverts - 1) % lnumverts];
1172                         this = poly->verts[i];
1173                         next = poly->verts[(i + 1) % lnumverts];
1174
1175                         VectorSubtract( this, prev, v1 );
1176                         VectorNormalize( v1 );
1177                         VectorSubtract( next, prev, v2 );
1178                         VectorNormalize( v2 );
1179
1180                         // skip co-linear points
1181                         #define COLINEAR_EPSILON 0.001
1182                         if ((fabs( v1[0] - v2[0] ) <= COLINEAR_EPSILON) &&
1183                                 (fabs( v1[1] - v2[1] ) <= COLINEAR_EPSILON) &&
1184                                 (fabs( v1[2] - v2[2] ) <= COLINEAR_EPSILON))
1185                         {
1186                                 int j;
1187                                 for (j = i + 1; j < lnumverts; ++j)
1188                                 {
1189                                         int k;
1190                                         for (k = 0; k < VERTEXSIZE; ++k)
1191                                                 poly->verts[j - 1][k] = poly->verts[j][k];
1192                                 }
1193                                 --lnumverts;
1194                                 ++nColinElim;
1195                                 // retry next vertex next time, which is now current vertex
1196                                 --i;
1197                         }
1198                 }
1199         }
1200         */
1201         poly->numverts = lnumverts;
1202 }
1203
1204 /*
1205 ========================
1206 GL_CreateSurfaceLightmap
1207 ========================
1208 */
1209 void GL_CreateSurfaceLightmap (msurface_t *surf)
1210 {
1211         int             smax, tmax;
1212
1213         if (surf->flags & (SURF_DRAWSKY|SURF_DRAWTURB))
1214                 return;
1215
1216         smax = (surf->extents[0]>>4)+1;
1217         tmax = (surf->extents[1]>>4)+1;
1218
1219         surf->lightmaptexturenum = AllocBlock (smax, tmax, &surf->light_s, &surf->light_t);
1220         if (nosubimage || nosubimagefragments)
1221                 return;
1222         glBindTexture(GL_TEXTURE_2D, lightmap_textures + surf->lightmaptexturenum);
1223         smax = ((surf->extents[0]>>4)+lightmapalign) & lightmapalignmask;
1224         if (lightmaprgba)
1225         {
1226                 R_BuildLightMap (surf, templight, smax * 4);
1227                 glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
1228         }
1229         else
1230         {
1231                 R_BuildLightMap (surf, templight, smax * 3);
1232                 glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
1233         }
1234 }
1235
1236
1237 /*
1238 ==================
1239 GL_BuildLightmaps
1240
1241 Builds the lightmap texture
1242 with all the surfaces from all brush models
1243 ==================
1244 */
1245 void GL_BuildLightmaps (void)
1246 {
1247         int             i, j;
1248         model_t *m;
1249
1250         memset (allocated, 0, sizeof(allocated));
1251
1252         r_framecount = 1;               // no dlightcache
1253
1254         if (gl_nosubimagefragments.value)
1255                 nosubimagefragments = 1;
1256         else
1257                 nosubimagefragments = 0;
1258
1259         if (gl_nosubimage.value)
1260                 nosubimage = 1;
1261         else
1262                 nosubimage = 0;
1263
1264         if (gl_lightmaprgba.value)
1265         {
1266                 lightmaprgba = true;
1267                 lightmapbytes = 4;
1268         }
1269         else
1270         {
1271                 lightmaprgba = false;
1272                 lightmapbytes = 3;
1273         }
1274
1275         // LordHavoc: NVIDIA seems to have a broken glTexSubImage2D,
1276         //            it needs to be aligned on 4 pixel boundaries...
1277         //            so I implemented an adjustable lightmap alignment
1278         if (gl_lightmapalign.value < 1)
1279                 gl_lightmapalign.value = 1;
1280         if (gl_lightmapalign.value > 16)
1281                 gl_lightmapalign.value = 16;
1282         lightmapalign = 1;
1283         while (lightmapalign < gl_lightmapalign.value)
1284                 lightmapalign <<= 1;
1285         gl_lightmapalign.value = lightmapalign;
1286         lightmapalignmask = ~(lightmapalign - 1);
1287         if (nosubimagefragments || nosubimage)
1288         {
1289                 lightmapalign = 1;
1290                 lightmapalignmask = ~0;
1291         }
1292
1293         if (!lightmap_textures)
1294         {
1295                 lightmap_textures = texture_extension_number;
1296                 texture_extension_number += MAX_LIGHTMAPS;
1297         }
1298
1299         for (j=1 ; j<MAX_MODELS ; j++)
1300         {
1301                 m = cl.model_precache[j];
1302                 if (!m)
1303                         break;
1304                 if (m->name[0] == '*')
1305                         continue;
1306                 r_pcurrentvertbase = m->vertexes;
1307                 currentmodel = m;
1308                 for (i=0 ; i<m->numsurfaces ; i++)
1309                 {
1310                         if ( m->surfaces[i].flags & SURF_DRAWTURB )
1311                                 continue;
1312                         if ( m->surfaces[i].flags & SURF_DRAWSKY )
1313                                 continue;
1314                         GL_CreateSurfaceLightmap (m->surfaces + i);
1315                         BuildSurfaceDisplayList (m->surfaces + i);
1316                 }
1317         }
1318
1319         if (nosubimage || nosubimagefragments)
1320         {
1321                 if (gl_mtexable)
1322                         qglSelectTexture(gl_mtex_enum+1);
1323                 for (i = 0;i < MAX_LIGHTMAPS;i++)
1324                 {
1325                         if (!allocated[i][0])
1326                                 break;
1327                         lightmapupdate[i][0] = BLOCK_HEIGHT;
1328                         lightmapupdate[i][1] = 0;
1329                         glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
1330                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1331                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1332                         if (lightmaprgba)
1333                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
1334                         else
1335                                 glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
1336                 }
1337                 if (gl_mtexable)
1338                         qglSelectTexture(gl_mtex_enum+0);
1339         }
1340 }
1341