gl_textures.c

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