gl_textures.c

   1
   2 #include "quakedef.h"
   3
   4 cvar_t  r_max_size = {CVAR_SAVE, "r_max_size", "2048"};
   5 cvar_t  r_max_scrapsize = {CVAR_SAVE, "r_max_scrapsize", "256"};
   6 cvar_t  r_picmip = {CVAR_SAVE, "r_picmip", "0"};
   7 cvar_t  r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
   8 cvar_t  r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
   9
  10 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  11 int             gl_filter_mag = GL_LINEAR;
  12
  13
  14 static mempool_t *texturemempool;
  15 static mempool_t *texturedatamempool;
  16 static mempool_t *textureprocessingmempool;
  17
  18 // note: this must not conflict with TEXF_ flags in r_textures.h
  19 // cleared when a texture is uploaded
  20 #define GLTEXF_UPLOAD 0x00010000
  21 // bitmask for mismatch checking
  22 #define GLTEXF_IMPORTANTBITS (0)
  23 // set when image is uploaded and freed
  24 #define GLTEXF_DESTROYED 0x00040000
  25
  26 // size of images which hold fragment textures, ignores picmip and max_size
  27 static int block_size;
  28
  29 typedef struct
  30 {
  31         int textype;
  32         int inputbytesperpixel;
  33         int internalbytesperpixel;
  34         int glformat;
  35         int glinternalformat;
  36 }
  37 textypeinfo_t;
  38
  39 static textypeinfo_t textype_qpalette       = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 3};
  40 static textypeinfo_t textype_rgb            = {TEXTYPE_RGB     , 3, 3, GL_RGB , 3};
  41 static textypeinfo_t textype_rgba           = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 3};
  42 static textypeinfo_t textype_qpalette_alpha = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 4};
  43 static textypeinfo_t textype_rgba_alpha     = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 4};
  44
  45 // a tiling texture (most common type)
  46 #define GLIMAGETYPE_TILE 0
  47 // a fragments texture (contains one or more fragment textures)
  48 #define GLIMAGETYPE_FRAGMENTS 1
  49
  50 #define GLTEXTURETYPE_1D 0
  51 #define GLTEXTURETYPE_2D 1
  52 #define GLTEXTURETYPE_3D 2
  53 #define GLTEXTURETYPE_CUBEMAP 3
  54
  55 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  56 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  57 static int cubemapside[6] =
  58 {
  59         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  60         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  61         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  62         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  63         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  64         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  65 };
  66
  67 // a gltextureimage can have one (or more if fragments) gltextures inside
  68 typedef struct gltextureimage_s
  69 {
  70         struct gltextureimage_s *imagechain;
  71         int texturecount;
  72         int type; // one of the GLIMAGETYPE_ values
  73         int texturetype; // one of the GLTEXTURETYPE_ values
  74         int sides; // 1 or 6 depending on texturetype
  75         int texnum; // GL texture slot number
  76         int width, height, depth; // 3D texture support
  77         int bytesperpixel; // bytes per pixel
  78         int glformat; // GL_RGB or GL_RGBA
  79         int glinternalformat; // 3 or 4
  80         int flags;
  81         short *blockallocation; // fragment allocation (2D only)
  82 }
  83 gltextureimage_t;
  84
  85 typedef struct gltexture_s
  86 {
  87         // this field is exposed to the R_GetTexture macro, for speed reasons
  88         // (must be identical in rtexture_t)
  89         int texnum; // GL texture slot number
  90
  91         // pointer to texturepool (check this to see if the texture is allocated)
  92         struct gltexturepool_s *pool;
  93         // pointer to next texture in texturepool chain
  94         struct gltexture_s *chain;
  95         // pointer into gltextureimage array
  96         gltextureimage_t *image;
  97         // name of the texture (this might be removed someday), no duplicates
  98         char *identifier;
  99         // location in the image, and size
 100         int x, y, z, width, height, depth;
 101         // copy of the original texture(s) supplied to the upload function, for
 102         // delayed uploads (non-precached)
 103         qbyte *inputtexels;
 104         // original data size in *inputtexels
 105         int inputdatasize;
 106         // flags supplied to the LoadTexture function
 107         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 108         int flags;
 109         // pointer to one of the textype_ structs
 110         textypeinfo_t *textype;
 111         // one of the GLTEXTURETYPE_ values
 112         int texturetype;
 113 }
 114 gltexture_t;
 115
 116 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 117
 118 typedef struct gltexturepool_s
 119 {
 120         int sentinel;
 121         struct gltextureimage_s *imagechain;
 122         struct gltexture_s *gltchain;
 123         struct gltexturepool_s *next;
 124 }
 125 gltexturepool_t;
 126
 127 static gltexturepool_t *gltexturepoolchain = NULL;
 128
 129 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
 130 static int resizebuffersize = 0;
 131 static qbyte *texturebuffer;
 132 static int texturebuffersize = 0;
 133
 134 static int realmaxsize = 0;
 135
 136 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 137 {
 138         if (flags & TEXF_ALPHA)
 139         {
 140                 switch(textype)
 141                 {
 142                 case TEXTYPE_QPALETTE:
 143                         return &textype_qpalette_alpha;
 144                 case TEXTYPE_RGB:
 145                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
 146                         return NULL;
 147                 case TEXTYPE_RGBA:
 148                         return &textype_rgba_alpha;
 149                 default:
 150                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 151                         return NULL;
 152                 }
 153         }
 154         else
 155         {
 156                 switch(textype)
 157                 {
 158                 case TEXTYPE_QPALETTE:
 159                         return &textype_qpalette;
 160                 case TEXTYPE_RGB:
 161                         return &textype_rgb;
 162                 case TEXTYPE_RGBA:
 163                         return &textype_rgba;
 164                 default:
 165                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 166                         return NULL;
 167                 }
 168         }
 169 }
 170
 171 static void R_UploadTexture(gltexture_t *t);
 172
 173 static void R_PrecacheTexture(gltexture_t *glt)
 174 {
 175         int precache;
 176         precache = false;
 177         if (glt->flags & TEXF_ALWAYSPRECACHE)
 178                 precache = true;
 179         else if (r_precachetextures.integer >= 2)
 180                 precache = true;
 181         else if (r_precachetextures.integer >= 1)
 182                 if (glt->flags & TEXF_PRECACHE)
 183                         precache = true;
 184
 185         if (precache)
 186                 R_UploadTexture(glt);
 187 }
 188
 189 int R_RealGetTexture(rtexture_t *rt)
 190 {
 191         if (rt)
 192         {
 193                 gltexture_t *glt;
 194                 glt = (gltexture_t *)rt;
 195                 if (glt->flags & GLTEXF_UPLOAD)
 196                         R_UploadTexture(glt);
 197                 glt->texnum = glt->image->texnum;
 198                 return glt->image->texnum;
 199         }
 200         else
 201                 return 0;
 202 }
 203
 204 void R_FreeTexture(rtexture_t *rt)
 205 {
 206         gltexture_t *glt, **gltpointer;
 207         gltextureimage_t *image, **gltimagepointer;
 208
 209         glt = (gltexture_t *)rt;
 210         if (glt == NULL)
 211                 Host_Error("R_FreeTexture: texture == NULL\n");
 212
 213         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 214         if (*gltpointer == glt)
 215                 *gltpointer = glt->chain;
 216         else
 217                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
 218
 219         // note: if freeing a fragment texture, this will not make the claimed
 220         // space available for new textures unless all other fragments in the
 221         // image are also freed
 222         image = glt->image;
 223         image->texturecount--;
 224         if (image->texturecount < 1)
 225         {
 226                 for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 227                 if (*gltimagepointer == image)
 228                         *gltimagepointer = image->imagechain;
 229                 else
 230                         Host_Error("R_FreeTexture: image not linked in pool\n");
 231                 if (image->texnum)
 232                         qglDeleteTextures(1, &image->texnum);
 233                 if (image->blockallocation)
 234                         Mem_Free(image->blockallocation);
 235                 Mem_Free(image);
 236         }
 237
 238         if (glt->identifier)
 239                 Mem_Free(glt->identifier);
 240         if (glt->inputtexels)
 241                 Mem_Free(glt->inputtexels);
 242         Mem_Free(glt);
 243 }
 244
 245 /*
 246 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 247 {
 248         gltexture_t     *glt;
 249
 250         if (!identifier)
 251                 return NULL;
 252
 253         for (glt = pool->gltchain;glt;glt = glt->chain)
 254                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 255                         return glt;
 256
 257         return NULL;
 258 }
 259 */
 260
 261 rtexturepool_t *R_AllocTexturePool(void)
 262 {
 263         gltexturepool_t *pool;
 264         if (texturemempool == NULL)
 265                 return NULL;
 266         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 267         if (pool == NULL)
 268                 return NULL;
 269         pool->next = gltexturepoolchain;
 270         gltexturepoolchain = pool;
 271         pool->sentinel = TEXTUREPOOL_SENTINEL;
 272         return (rtexturepool_t *)pool;
 273 }
 274
 275 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 276 {
 277         gltexturepool_t *pool, **poolpointer;
 278         if (rtexturepool == NULL)
 279                 return;
 280         if (*rtexturepool == NULL)
 281                 return;
 282         pool = (gltexturepool_t *)(*rtexturepool);
 283         *rtexturepool = NULL;
 284         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 285                 Host_Error("R_FreeTexturePool: pool already freed\n");
 286         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 287         if (*poolpointer == pool)
 288                 *poolpointer = pool->next;
 289         else
 290                 Host_Error("R_FreeTexturePool: pool not linked\n");
 291         while (pool->gltchain)
 292                 R_FreeTexture((rtexture_t *)pool->gltchain);
 293         if (pool->imagechain)
 294                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 295         Mem_Free(pool);
 296 }
 297
 298
 299 typedef struct
 300 {
 301         char *name;
 302         int minification, magnification;
 303 }
 304 glmode_t;
 305
 306 static glmode_t modes[] =
 307 {
 308         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 309         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 310         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 311         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 312         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 313         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 314 };
 315
 316 extern int gl_backend_rebindtextures;
 317
 318 static void GL_TextureMode_f (void)
 319 {
 320         int i;
 321         gltextureimage_t *image;
 322         gltexturepool_t *pool;
 323
 324         if (Cmd_Argc() == 1)
 325         {
 326                 for (i = 0;i < 6;i++)
 327                 {
 328                         if (gl_filter_min == modes[i].minification)
 329                         {
 330                                 Con_Printf ("%s\n", modes[i].name);
 331                                 return;
 332                         }
 333                 }
 334                 Con_Printf ("current filter is unknown???\n");
 335                 return;
 336         }
 337
 338         for (i = 0;i < 6;i++)
 339                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 340                         break;
 341         if (i == 6)
 342         {
 343                 Con_Printf ("bad filter name\n");
 344                 return;
 345         }
 346
 347         gl_filter_min = modes[i].minification;
 348         gl_filter_mag = modes[i].magnification;
 349
 350         // change all the existing mipmap texture objects
 351         // FIXME: force renderer(/client/something?) restart instead?
 352         for (pool = gltexturepoolchain;pool;pool = pool->next)
 353         {
 354                 for (image = pool->imagechain;image;image = image->imagechain)
 355                 {
 356                         // only update already uploaded images
 357                         if (!(image->flags & GLTEXF_UPLOAD))
 358                         {
 359                                 qglBindTexture(GL_TEXTURE_2D, image->texnum);
 360                                 if (image->flags & TEXF_MIPMAP)
 361                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 362                                 else
 363                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 364                                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 365                         }
 366                 }
 367         }
 368         gl_backend_rebindtextures = true;
 369 }
 370
 371 static int R_CalcTexelDataSize (gltexture_t *glt)
 372 {
 373         int width2, height2, depth2, size;
 374         if (glt->flags & TEXF_FRAGMENT)
 375                 size = glt->width * glt->height * glt->depth;
 376         else
 377         {
 378                 if (r_max_size.integer > realmaxsize)
 379                         Cvar_SetValue("r_max_size", realmaxsize);
 380                 // calculate final size
 381                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 382                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 383                 for (depth2 = 1;depth2 < glt->depth;depth2 <<= 1);
 384                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
 385                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
 386                 for (depth2 >>= r_picmip.integer;depth2 > r_max_size.integer;depth2 >>= 1);
 387                 if (width2 < 1) width2 = 1;
 388                 if (height2 < 1) height2 = 1;
 389                 if (depth2 < 1) depth2 = 1;
 390
 391                 size = 0;
 392                 if (glt->flags & TEXF_MIPMAP)
 393                 {
 394                         while (width2 > 1 || height2 > 1 || depth2 > 1)
 395                         {
 396                                 size += width2 * height2 * depth2;
 397                                 if (width2 > 1)
 398                                         width2 >>= 1;
 399                                 if (height2 > 1)
 400                                         height2 >>= 1;
 401                                 if (depth2 > 1)
 402                                         depth2 >>= 1;
 403                         }
 404                         size++; // count the last 1x1 mipmap
 405                 }
 406                 else
 407                         size = width2 * height2 * depth2;
 408         }
 409         size *= glt->textype->internalbytesperpixel * glt->image->sides;
 410
 411         return size;
 412 }
 413
 414 void R_TextureStats_PrintTotal(void)
 415 {
 416         int glsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 417         gltexture_t *glt;
 418         gltexturepool_t *pool;
 419         for (pool = gltexturepoolchain;pool;pool = pool->next)
 420         {
 421                 for (glt = pool->gltchain;glt;glt = glt->chain)
 422                 {
 423                         glsize = R_CalcTexelDataSize(glt);
 424                         total++;
 425                         totalt += glsize;
 426                         totalp += glt->inputdatasize;
 427                         if (!(glt->flags & GLTEXF_UPLOAD))
 428                         {
 429                                 loaded++;
 430                                 loadedt += glsize;
 431                                 loadedp += glt->inputdatasize;
 432                         }
 433                 }
 434         }
 435         Con_Printf("total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", total, totalt / 1048576.0, totalp / 1048576.0, loaded, loadedt / 1048576.0, loadedp / 1048576.0, total - loaded, (totalt - loadedt) / 1048576.0, (totalp - loadedp) / 1048576.0);
 436 }
 437
 438 static void R_TextureStats_f(void)
 439 {
 440         int loaded;
 441         gltexture_t *glt;
 442         gltexturepool_t *pool;
 443         Con_Printf("glsize input loaded mip alpha name\n");
 444         for (pool = gltexturepoolchain;pool;pool = pool->next)
 445         {
 446                 for (glt = pool->gltchain;glt;glt = glt->chain)
 447                 {
 448                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 449                         Con_Printf("%c%4i%c%c%4i%c %s %s %s %s\n", loaded ? '[' : ' ', (R_CalcTexelDataSize(glt) + 1023) / 1024, loaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->inputdatasize + 1023) / 1024, glt->inputtexels ? ']' : ' ', loaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier ? glt->identifier : "<unnamed>");
 450                 }
 451                 Con_Printf("pool %10p\n", pool);
 452         }
 453         R_TextureStats_PrintTotal();
 454 }
 455
 456 char engineversion[40];
 457
 458 static void r_textures_start(void)
 459 {
 460         // deal with size limits of various drivers (3dfx in particular)
 461         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 462         CHECKGLERROR
 463         // LordHavoc: allow any alignment
 464         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 465         CHECKGLERROR
 466
 467         // use the largest scrap texture size we can (not sure if this is really a good idea)
 468         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
 469
 470         texturemempool = Mem_AllocPool("Texture Info");
 471         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
 472         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
 473 }
 474
 475 static void r_textures_shutdown(void)
 476 {
 477         rtexturepool_t *temp;
 478         while(gltexturepoolchain)
 479         {
 480                 temp = (rtexturepool_t *) gltexturepoolchain;
 481                 R_FreeTexturePool(&temp);
 482         }
 483
 484         resizebuffersize = 0;
 485         texturebuffersize = 0;
 486         resizebuffer = NULL;
 487         colorconvertbuffer = NULL;
 488         texturebuffer = NULL;
 489         Mem_FreePool(&texturemempool);
 490         Mem_FreePool(&texturedatamempool);
 491         Mem_FreePool(&textureprocessingmempool);
 492 }
 493
 494 static void r_textures_newmap(void)
 495 {
 496 }
 497
 498 void R_Textures_Init (void)
 499 {
 500         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
 501         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 502         Cvar_RegisterVariable (&r_max_scrapsize);
 503         Cvar_RegisterVariable (&r_max_size);
 504         Cvar_RegisterVariable (&r_picmip);
 505         Cvar_RegisterVariable (&r_lerpimages);
 506         Cvar_RegisterVariable (&r_precachetextures);
 507
 508         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 509 }
 510
 511 void R_Textures_Frame (void)
 512 {
 513         // could do procedural texture animation here, if we keep track of which
 514         // textures were accessed this frame...
 515
 516         // free the resize buffers
 517         resizebuffersize = 0;
 518         if (resizebuffer)
 519         {
 520                 Mem_Free(resizebuffer);
 521                 resizebuffer = NULL;
 522         }
 523         if (colorconvertbuffer)
 524         {
 525                 Mem_Free(colorconvertbuffer);
 526                 colorconvertbuffer = NULL;
 527         }
 528 }
 529
 530 void R_MakeResizeBufferBigger(int size)
 531 {
 532         if (resizebuffersize < size)
 533         {
 534                 resizebuffersize = size;
 535                 if (resizebuffer)
 536                         Mem_Free(resizebuffer);
 537                 if (colorconvertbuffer)
 538                         Mem_Free(colorconvertbuffer);
 539                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 540                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 541                 if (!resizebuffer || !colorconvertbuffer)
 542                         Host_Error("R_Upload: out of memory\n");
 543         }
 544 }
 545
 546 static void GL_SetupTextureParameters(int flags, int texturetype)
 547 {
 548         int textureenum = gltexturetypeenums[texturetype];
 549         int wrapmode = (flags & TEXF_CLAMP) ? GL_CLAMP : GL_REPEAT;
 550
 551         CHECKGLERROR
 552
 553         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);
 554         if (gltexturetypedimensions[texturetype] >= 2)
 555                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);
 556         if (gltexturetypedimensions[texturetype] >= 3)
 557                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);
 558
 559         if (flags & TEXF_MIPMAP)
 560                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 561         else
 562                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 563         qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 564
 565         CHECKGLERROR
 566 }
 567
 568 static void R_Upload(gltexture_t *glt, qbyte *data)
 569 {
 570         int i, mip, width, height, depth, internalformat;
 571         qbyte *prevbuffer;
 572         prevbuffer = data;
 573
 574         CHECKGLERROR
 575
 576         glt->texnum = glt->image->texnum;
 577         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 578         CHECKGLERROR
 579         glt->flags &= ~GLTEXF_UPLOAD;
 580         gl_backend_rebindtextures = true;
 581
 582         if (glt->flags & TEXF_FRAGMENT)
 583         {
 584                 if (glt->image->flags & GLTEXF_UPLOAD)
 585                 {
 586                         glt->image->flags &= ~GLTEXF_UPLOAD;
 587                         Con_DPrintf("uploaded new fragments image\n");
 588                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 589                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 590                         switch(glt->image->texturetype)
 591                         {
 592                         case GLTEXTURETYPE_1D:
 593                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 594                                 CHECKGLERROR
 595                                 break;
 596                         case GLTEXTURETYPE_2D:
 597                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 598                                 CHECKGLERROR
 599                                 break;
 600                         case GLTEXTURETYPE_3D:
 601                                 qglTexImage3D(GL_TEXTURE_3D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, glt->image->depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 602                                 CHECKGLERROR
 603                                 break;
 604                         default:
 605                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 606                                 break;
 607                         }
 608                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 609                 }
 610
 611                 if (prevbuffer == NULL)
 612                 {
 613                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 614                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 615                         prevbuffer = resizebuffer;
 616                 }
 617                 else if (glt->textype->textype == TEXTYPE_QPALETTE)
 618                 {
 619                         // promote paletted to RGBA, so we only have to worry about RGB and
 620                         // RGBA in the rest of this code
 621                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 622                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, d_8to24table);
 623                         prevbuffer = colorconvertbuffer;
 624                 }
 625
 626                 switch(glt->image->texturetype)
 627                 {
 628                 case GLTEXTURETYPE_1D:
 629                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 630                         CHECKGLERROR
 631                         break;
 632                 case GLTEXTURETYPE_2D:
 633                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 634                         CHECKGLERROR
 635                         break;
 636                 case GLTEXTURETYPE_3D:
 637                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 638                         CHECKGLERROR
 639                         break;
 640                 default:
 641                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 642                         break;
 643                 }
 644                 glt->texnum = glt->image->texnum;
 645                 return;
 646         }
 647
 648         glt->image->flags &= ~GLTEXF_UPLOAD;
 649
 650         // these are rounded up versions of the size to do better resampling
 651         for (width  = 1;width  < glt->width ;width  <<= 1);
 652         for (height = 1;height < glt->height;height <<= 1);
 653         for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 654
 655         R_MakeResizeBufferBigger(width * height * depth * glt->image->bytesperpixel);
 656
 657         if (prevbuffer == NULL)
 658         {
 659                 width = glt->image->width;
 660                 height = glt->image->height;
 661                 depth = glt->image->depth;
 662                 memset(resizebuffer, 255, width * height * depth * glt->image->bytesperpixel);
 663                 prevbuffer = resizebuffer;
 664         }
 665         else
 666         {
 667                 if (glt->textype->textype == TEXTYPE_QPALETTE)
 668                 {
 669                         // promote paletted to RGBA, so we only have to worry about RGB and
 670                         // RGBA in the rest of this code
 671                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, d_8to24table);
 672                         prevbuffer = colorconvertbuffer;
 673                 }
 674
 675                 if (glt->width != width || glt->height != height || glt->depth != depth)
 676                 {
 677                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 678                         prevbuffer = resizebuffer;
 679                 }
 680
 681                 // apply picmip/max_size limitations
 682                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 683                 {
 684                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 685                         prevbuffer = resizebuffer;
 686                 }
 687         }
 688
 689         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
 690         internalformat = 3;
 691         if (glt->flags & TEXF_ALPHA)
 692                 internalformat = 4;
 693
 694         mip = 0;
 695         switch(glt->image->texturetype)
 696         {
 697         case GLTEXTURETYPE_1D:
 698                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 699                 CHECKGLERROR
 700                 if (glt->flags & TEXF_MIPMAP)
 701                 {
 702                         while (width > 1 || height > 1 || depth > 1)
 703                         {
 704                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 705                                 prevbuffer = resizebuffer;
 706                                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 707                                 CHECKGLERROR
 708                         }
 709                 }
 710                 break;
 711         case GLTEXTURETYPE_2D:
 712                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 713                 CHECKGLERROR
 714                 if (glt->flags & TEXF_MIPMAP)
 715                 {
 716                         while (width > 1 || height > 1 || depth > 1)
 717                         {
 718                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 719                                 prevbuffer = resizebuffer;
 720                                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 721                                 CHECKGLERROR
 722                         }
 723                 }
 724                 break;
 725         case GLTEXTURETYPE_3D:
 726                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 727                 CHECKGLERROR
 728                 if (glt->flags & TEXF_MIPMAP)
 729                 {
 730                         while (width > 1 || height > 1 || depth > 1)
 731                         {
 732                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 733                                 prevbuffer = resizebuffer;
 734                                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 735                                 CHECKGLERROR
 736                         }
 737                 }
 738                 break;
 739         case GLTEXTURETYPE_CUBEMAP:
 740                 // convert and upload each side in turn,
 741                 // from a continuous block of input texels
 742                 texturebuffer = prevbuffer;
 743                 for (i = 0;i < 6;i++)
 744                 {
 745                         prevbuffer = texturebuffer;
 746                         texturebuffer += width * height * depth * glt->textype->inputbytesperpixel;
 747                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 748                         CHECKGLERROR
 749                         if (glt->flags & TEXF_MIPMAP)
 750                         {
 751                                 while (width > 1 || height > 1 || depth > 1)
 752                                 {
 753                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 754                                         prevbuffer = resizebuffer;
 755                                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 756                                         CHECKGLERROR
 757                                 }
 758                         }
 759                 }
 760                 break;
 761         }
 762         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 763 }
 764
 765 static void R_FindImageForTexture(gltexture_t *glt)
 766 {
 767         int i, j, best, best2, x, y, z, w, h, d;
 768         textypeinfo_t *texinfo;
 769         gltexturepool_t *pool;
 770         gltextureimage_t *image, **imagechainpointer;
 771         texinfo = glt->textype;
 772         pool = glt->pool;
 773
 774         // remains -1 until uploaded
 775         glt->texnum = -1;
 776
 777         x = 0;
 778         y = 0;
 779         z = 0;
 780         w = glt->width;
 781         h = glt->height;
 782         d = glt->depth;
 783         if (glt->flags & TEXF_FRAGMENT)
 784         {
 785                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 786                 {
 787                         image = *imagechainpointer;
 788                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 789                                 continue;
 790                         if (image->texturetype != glt->texturetype)
 791                                 continue;
 792                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
 793                                 continue;
 794                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 795                                 continue;
 796                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 797                                 continue;
 798
 799                         // got a fragments texture, find a place in it if we can
 800                         for (best = image->width, i = 0;i < image->width - w;i++)
 801                         {
 802                                 for (best2 = 0, j = 0;j < w;j++)
 803                                 {
 804                                         if (image->blockallocation[i+j] >= best)
 805                                                 break;
 806                                         if (best2 < image->blockallocation[i+j])
 807                                                 best2 = image->blockallocation[i+j];
 808                                 }
 809                                 if (j == w)
 810                                 {
 811                                         // this is a valid spot
 812                                         x = i;
 813                                         y = best = best2;
 814                                 }
 815                         }
 816
 817                         if (best + h > image->height)
 818                                 continue;
 819
 820                         for (i = 0;i < w;i++)
 821                                 image->blockallocation[x + i] = best + h;
 822
 823                         glt->x = x;
 824                         glt->y = y;
 825                         glt->z = 0;
 826                         glt->image = image;
 827                         image->texturecount++;
 828                         return;
 829                 }
 830
 831                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 832                 if (image == NULL)
 833                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 834                 image->type = GLIMAGETYPE_FRAGMENTS;
 835                 // make sure the created image is big enough for the fragment
 836                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 837                 image->height = 1;
 838                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 839                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 840                 image->depth = 1;
 841                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 842                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 843                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
 844                 memset(image->blockallocation, 0, image->width * sizeof(short));
 845
 846                 x = 0;
 847                 y = 0;
 848                 z = 0;
 849                 for (i = 0;i < w;i++)
 850                         image->blockallocation[x + i] = y + h;
 851         }
 852         else
 853         {
 854                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 855
 856                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 857                 if (image == NULL)
 858                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 859                 image->type = GLIMAGETYPE_TILE;
 860                 image->blockallocation = NULL;
 861
 862                 // calculate final size
 863                 if (r_max_size.integer > realmaxsize)
 864                         Cvar_SetValue("r_max_size", realmaxsize);
 865                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 866                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 867                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
 868                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
 869                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
 870                 for (image->depth >>= r_picmip.integer;image->depth > r_max_size.integer;image->depth >>= 1);
 871                 if (image->width < 1) image->width = 1;
 872                 if (image->height < 1) image->height = 1;
 873                 if (image->depth < 1) image->depth = 1;
 874         }
 875         image->texturetype = glt->texturetype;
 876         image->glinternalformat = texinfo->glinternalformat;
 877         image->glformat = texinfo->glformat;
 878         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP)) | GLTEXF_UPLOAD;
 879         image->bytesperpixel = texinfo->internalbytesperpixel;
 880         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 881         // get a texture number to use
 882         qglGenTextures(1, &image->texnum);
 883         *imagechainpointer = image;
 884         image->texturecount++;
 885
 886         glt->x = x;
 887         glt->y = y;
 888         glt->y = z;
 889         glt->image = image;
 890 }
 891
 892 // note: R_FindImageForTexture must be called before this
 893 static void R_UploadTexture (gltexture_t *glt)
 894 {
 895         if (!(glt->flags & GLTEXF_UPLOAD))
 896                 return;
 897
 898         R_Upload(glt, glt->inputtexels);
 899         if (glt->inputtexels)
 900         {
 901                 Mem_Free(glt->inputtexels);
 902                 glt->inputtexels = NULL;
 903                 glt->flags |= GLTEXF_DESTROYED;
 904         }
 905         else if (glt->flags & GLTEXF_DESTROYED)
 906                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 907 }
 908
 909 static rtexture_t *R_SetupTexture(rtexturepool_t *rtexturepool, char *identifier, int width, int height, int depth, int sides, int flags, int textype, int texturetype, qbyte *data)
 910 {
 911         int i, size;
 912         gltexture_t *glt;
 913         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 914         textypeinfo_t *texinfo;
 915
 916         if (cls.state == ca_dedicated)
 917                 return NULL;
 918
 919         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
 920                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
 921         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 922                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
 923         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 924                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
 925
 926         /*
 927         glt = R_FindTexture (pool, identifier);
 928         if (glt)
 929         {
 930                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
 931                 R_FreeTexture((rtexture_t *)glt);
 932         }
 933         */
 934
 935         texinfo = R_GetTexTypeInfo(textype, flags);
 936         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 937
 938         // clear the alpha flag if the texture has no transparent pixels
 939         switch(textype)
 940         {
 941         case TEXTYPE_QPALETTE:
 942                 if (flags & TEXF_ALPHA)
 943                 {
 944                         flags &= ~TEXF_ALPHA;
 945                         if (data)
 946                         {
 947                                 for (i = 0;i < size;i++)
 948                                 {
 949                                         if (data[i] == 255)
 950                                         {
 951                                                 flags |= TEXF_ALPHA;
 952                                                 break;
 953                                         }
 954                                 }
 955                         }
 956                 }
 957                 break;
 958         case TEXTYPE_RGB:
 959                 if (flags & TEXF_ALPHA)
 960                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
 961                 break;
 962         case TEXTYPE_RGBA:
 963                 if (flags & TEXF_ALPHA)
 964                 {
 965                         flags &= ~TEXF_ALPHA;
 966                         if (data)
 967                         {
 968                                 for (i = 3;i < size;i += 4)
 969                                 {
 970                                         if (data[i] < 255)
 971                                         {
 972                                                 flags |= TEXF_ALPHA;
 973                                                 break;
 974                                         }
 975                                 }
 976                         }
 977                 }
 978                 break;
 979         default:
 980                 Host_Error("R_LoadTexture: unknown texture type\n");
 981         }
 982
 983         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
 984         if (identifier)
 985         {
 986                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
 987                 strcpy (glt->identifier, identifier);
 988         }
 989         else
 990                 glt->identifier = NULL;
 991         glt->pool = pool;
 992         glt->chain = pool->gltchain;
 993         pool->gltchain = glt;
 994         glt->width = width;
 995         glt->height = height;
 996         glt->depth = depth;
 997         glt->flags = flags | GLTEXF_UPLOAD;
 998         glt->textype = texinfo;
 999         glt->texturetype = texturetype;
1000         glt->inputdatasize = size;
1001
1002         if (data)
1003         {
1004                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1005                 if (glt->inputtexels == NULL)
1006                         Sys_Error("R_SetupTexture: out of memory\n");
1007                 memcpy(glt->inputtexels, data, size);
1008         }
1009         else
1010                 glt->inputtexels = NULL;
1011
1012         R_FindImageForTexture(glt);
1013         R_PrecacheTexture(glt);
1014
1015         return (rtexture_t *)glt;
1016 }
1017
1018 rtexture_t *R_LoadTexture(rtexturepool_t *rtexturepool, char *identifier, int width, int height, qbyte *data, int textype, int flags)
1019 {
1020         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data);
1021 }
1022
1023 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, char *identifier, int width, qbyte *data, int textype, int flags)
1024 {
1025         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data);
1026 }
1027
1028 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, char *identifier, int width, int height, qbyte *data, int textype, int flags)
1029 {
1030         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data);
1031 }
1032
1033 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, char *identifier, int width, int height, int depth, qbyte *data, int textype, int flags)
1034 {
1035         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data);
1036 }
1037
1038 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, char *identifier, int width, qbyte *data, int textype, int flags)
1039 {
1040         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data);
1041 }
1042
1043 int R_TextureHasAlpha(rtexture_t *rt)
1044 {
1045         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1046 }
1047
1048 int R_TextureWidth(rtexture_t *rt)
1049 {
1050         return rt ? ((gltexture_t *)rt)->width : 0;
1051 }
1052
1053 int R_TextureHeight(rtexture_t *rt)
1054 {
1055         return rt ? ((gltexture_t *)rt)->height : 0;
1056 }
1057
1058 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1059 {
1060         gltexture_t *glt;
1061         float iwidth, iheight, idepth;
1062         if (cls.state == ca_dedicated)
1063         {
1064                 if (x)
1065                         *x = 0;
1066                 if (y)
1067                         *y = 0;
1068                 if (z)
1069                         *z = 0;
1070                 if (fx1 || fy1 || fx2 || fy2)
1071                 {
1072                         if (fx1)
1073                                 *fx1 = 0;
1074                         if (fy1)
1075                                 *fy1 = 0;
1076                         if (fz1)
1077                                 *fz1 = 0;
1078                         if (fx2)
1079                                 *fx2 = 1;
1080                         if (fy2)
1081                                 *fy2 = 1;
1082                         if (fz2)
1083                                 *fz2 = 1;
1084                 }
1085                 return;
1086         }
1087         if (!rt)
1088                 Host_Error("R_FragmentLocation: no texture supplied\n");
1089         glt = (gltexture_t *)rt;
1090         if (glt->flags & TEXF_FRAGMENT)
1091         {
1092                 if (x)
1093                         *x = glt->x;
1094                 if (y)
1095                         *y = glt->y;
1096                 if (fx1 || fy1 || fx2 || fy2)
1097                 {
1098                         iwidth = 1.0f / glt->image->width;
1099                         iheight = 1.0f / glt->image->height;
1100                         idepth = 1.0f / glt->image->depth;
1101                         if (fx1)
1102                                 *fx1 = glt->x * iwidth;
1103                         if (fy1)
1104                                 *fy1 = glt->y * iheight;
1105                         if (fz1)
1106                                 *fz1 = glt->z * idepth;
1107                         if (fx2)
1108                                 *fx2 = (glt->x + glt->width) * iwidth;
1109                         if (fy2)
1110                                 *fy2 = (glt->y + glt->height) * iheight;
1111                         if (fz2)
1112                                 *fz2 = (glt->z + glt->depth) * idepth;
1113                 }
1114         }
1115         else
1116         {
1117                 if (x)
1118                         *x = 0;
1119                 if (y)
1120                         *y = 0;
1121                 if (z)
1122                         *z = 0;
1123                 if (fx1 || fy1 || fx2 || fy2)
1124                 {
1125                         if (fx1)
1126                                 *fx1 = 0;
1127                         if (fy1)
1128                                 *fy1 = 0;
1129                         if (fz1)
1130                                 *fz1 = 0;
1131                         if (fx2)
1132                                 *fx2 = 1;
1133                         if (fy2)
1134                                 *fy2 = 1;
1135                         if (fz2)
1136                                 *fz2 = 1;
1137                 }
1138         }
1139 }
1140
1141 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1142 {
1143         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1144 }
1145
1146 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1147 {
1148         return width;
1149 }
1150
1151 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1152 {
1153         gltexture_t *glt;
1154         if (rt == NULL)
1155                 Host_Error("R_UpdateTexture: no texture supplied\n");
1156         if (data == NULL)
1157                 Host_Error("R_UpdateTexture: no data supplied\n");
1158         glt = (gltexture_t *)rt;
1159
1160         // if it has not been uploaded yet, update the data that will be used when it is
1161         if (glt->inputtexels)
1162                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1163         else
1164                 R_Upload(glt, data);
1165 }
1166