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         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);
 558         if (gltexturetypedimensions[texturetype] >= 3)
 559                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);
 560
 561         if (flags & TEXF_MIPMAP)
 562                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 563         else
 564                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 565         qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 566
 567         CHECKGLERROR
 568 }
 569
 570 static void R_Upload(gltexture_t *glt, qbyte *data)
 571 {
 572         int i, mip, width, height, depth, internalformat;
 573         qbyte *prevbuffer;
 574         prevbuffer = data;
 575
 576         CHECKGLERROR
 577
 578         glt->texnum = glt->image->texnum;
 579         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 580         CHECKGLERROR
 581         glt->flags &= ~GLTEXF_UPLOAD;
 582         gl_backend_rebindtextures = true;
 583
 584         if (glt->flags & TEXF_FRAGMENT)
 585         {
 586                 if (glt->image->flags & GLTEXF_UPLOAD)
 587                 {
 588                         glt->image->flags &= ~GLTEXF_UPLOAD;
 589                         Con_DPrintf("uploaded new fragments image\n");
 590                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 591                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 592                         switch(glt->image->texturetype)
 593                         {
 594                         case GLTEXTURETYPE_1D:
 595                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 596                                 CHECKGLERROR
 597                                 break;
 598                         case GLTEXTURETYPE_2D:
 599                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 600                                 CHECKGLERROR
 601                                 break;
 602                         case GLTEXTURETYPE_3D:
 603                                 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);
 604                                 CHECKGLERROR
 605                                 break;
 606                         default:
 607                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 608                                 break;
 609                         }
 610                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 611                 }
 612
 613                 if (prevbuffer == NULL)
 614                 {
 615                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 616                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 617                         prevbuffer = resizebuffer;
 618                 }
 619                 else if (glt->textype->textype == TEXTYPE_PALETTE)
 620                 {
 621                         // promote paletted to RGBA, so we only have to worry about RGB and
 622                         // RGBA in the rest of this code
 623                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
 624                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
 625                         prevbuffer = colorconvertbuffer;
 626                 }
 627
 628                 switch(glt->image->texturetype)
 629                 {
 630                 case GLTEXTURETYPE_1D:
 631                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 632                         CHECKGLERROR
 633                         break;
 634                 case GLTEXTURETYPE_2D:
 635                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 636                         CHECKGLERROR
 637                         break;
 638                 case GLTEXTURETYPE_3D:
 639                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 640                         CHECKGLERROR
 641                         break;
 642                 default:
 643                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 644                         break;
 645                 }
 646                 glt->texnum = glt->image->texnum;
 647                 return;
 648         }
 649
 650         glt->image->flags &= ~GLTEXF_UPLOAD;
 651
 652         // these are rounded up versions of the size to do better resampling
 653         for (width  = 1;width  < glt->width ;width  <<= 1);
 654         for (height = 1;height < glt->height;height <<= 1);
 655         for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 656
 657         R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
 658
 659         if (prevbuffer == NULL)
 660         {
 661                 width = glt->image->width;
 662                 height = glt->image->height;
 663                 depth = glt->image->depth;
 664                 memset(resizebuffer, 255, width * height * depth * glt->image->bytesperpixel);
 665                 prevbuffer = resizebuffer;
 666         }
 667         else
 668         {
 669                 if (glt->textype->textype == TEXTYPE_PALETTE)
 670                 {
 671                         // promote paletted to RGBA, so we only have to worry about RGB and
 672                         // RGBA in the rest of this code
 673                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
 674                         prevbuffer = colorconvertbuffer;
 675                 }
 676         }
 677
 678         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
 679         internalformat = 3;
 680         if (glt->flags & TEXF_ALPHA)
 681                 internalformat = 4;
 682
 683         // cubemaps contain multiple images and thus get processed a bit differently
 684         if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
 685         {
 686                 if (glt->width != width || glt->height != height || glt->depth != depth)
 687                 {
 688                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 689                         prevbuffer = resizebuffer;
 690                 }
 691                 // picmip/max_size
 692                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 693                 {
 694                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 695                         prevbuffer = resizebuffer;
 696                 }
 697         }
 698         mip = 0;
 699         switch(glt->image->texturetype)
 700         {
 701         case GLTEXTURETYPE_1D:
 702                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 703                 CHECKGLERROR
 704                 if (glt->flags & TEXF_MIPMAP)
 705                 {
 706                         while (width > 1 || height > 1 || depth > 1)
 707                         {
 708                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 709                                 prevbuffer = resizebuffer;
 710                                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 711                                 CHECKGLERROR
 712                         }
 713                 }
 714                 break;
 715         case GLTEXTURETYPE_2D:
 716                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 717                 CHECKGLERROR
 718                 if (glt->flags & TEXF_MIPMAP)
 719                 {
 720                         while (width > 1 || height > 1 || depth > 1)
 721                         {
 722                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 723                                 prevbuffer = resizebuffer;
 724                                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 725                                 CHECKGLERROR
 726                         }
 727                 }
 728                 break;
 729         case GLTEXTURETYPE_3D:
 730                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 731                 CHECKGLERROR
 732                 if (glt->flags & TEXF_MIPMAP)
 733                 {
 734                         while (width > 1 || height > 1 || depth > 1)
 735                         {
 736                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 737                                 prevbuffer = resizebuffer;
 738                                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 739                                 CHECKGLERROR
 740                         }
 741                 }
 742                 break;
 743         case GLTEXTURETYPE_CUBEMAP:
 744                 // convert and upload each side in turn,
 745                 // from a continuous block of input texels
 746                 texturebuffer = prevbuffer;
 747                 for (i = 0;i < 6;i++)
 748                 {
 749                         prevbuffer = texturebuffer;
 750                         texturebuffer += width * height * depth * glt->textype->inputbytesperpixel;
 751                         if (glt->width != width || glt->height != height || glt->depth != depth)
 752                         {
 753                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 754                                 prevbuffer = resizebuffer;
 755                         }
 756                         // picmip/max_size
 757                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 758                         {
 759                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 760                                 prevbuffer = resizebuffer;
 761                         }
 762                         mip = 0;
 763                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 764                         CHECKGLERROR
 765                         if (glt->flags & TEXF_MIPMAP)
 766                         {
 767                                 while (width > 1 || height > 1 || depth > 1)
 768                                 {
 769                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 770                                         prevbuffer = resizebuffer;
 771                                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 772                                         CHECKGLERROR
 773                                 }
 774                         }
 775                 }
 776                 break;
 777         }
 778         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 779 }
 780
 781 static void R_FindImageForTexture(gltexture_t *glt)
 782 {
 783         int i, j, best, best2, x, y, z, w, h, d;
 784         textypeinfo_t *texinfo;
 785         gltexturepool_t *pool;
 786         gltextureimage_t *image, **imagechainpointer;
 787         texinfo = glt->textype;
 788         pool = glt->pool;
 789
 790         // remains -1 until uploaded
 791         glt->texnum = -1;
 792
 793         x = 0;
 794         y = 0;
 795         z = 0;
 796         w = glt->width;
 797         h = glt->height;
 798         d = glt->depth;
 799         if (glt->flags & TEXF_FRAGMENT)
 800         {
 801                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 802                 {
 803                         image = *imagechainpointer;
 804                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 805                                 continue;
 806                         if (image->texturetype != glt->texturetype)
 807                                 continue;
 808                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
 809                                 continue;
 810                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 811                                 continue;
 812                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 813                                 continue;
 814
 815                         // got a fragments texture, find a place in it if we can
 816                         for (best = image->width, i = 0;i < image->width - w;i++)
 817                         {
 818                                 for (best2 = 0, j = 0;j < w;j++)
 819                                 {
 820                                         if (image->blockallocation[i+j] >= best)
 821                                                 break;
 822                                         if (best2 < image->blockallocation[i+j])
 823                                                 best2 = image->blockallocation[i+j];
 824                                 }
 825                                 if (j == w)
 826                                 {
 827                                         // this is a valid spot
 828                                         x = i;
 829                                         y = best = best2;
 830                                 }
 831                         }
 832
 833                         if (best + h > image->height)
 834                                 continue;
 835
 836                         for (i = 0;i < w;i++)
 837                                 image->blockallocation[x + i] = best + h;
 838
 839                         glt->x = x;
 840                         glt->y = y;
 841                         glt->z = 0;
 842                         glt->image = image;
 843                         image->texturecount++;
 844                         return;
 845                 }
 846
 847                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 848                 if (image == NULL)
 849                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 850                 image->type = GLIMAGETYPE_FRAGMENTS;
 851                 // make sure the created image is big enough for the fragment
 852                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 853                 image->height = 1;
 854                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 855                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 856                 image->depth = 1;
 857                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 858                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 859                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
 860                 memset(image->blockallocation, 0, image->width * sizeof(short));
 861
 862                 x = 0;
 863                 y = 0;
 864                 z = 0;
 865                 for (i = 0;i < w;i++)
 866                         image->blockallocation[x + i] = y + h;
 867         }
 868         else
 869         {
 870                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 871
 872                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 873                 if (image == NULL)
 874                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 875                 image->type = GLIMAGETYPE_TILE;
 876                 image->blockallocation = NULL;
 877
 878                 // calculate final size
 879                 if (r_max_size.integer > realmaxsize)
 880                         Cvar_SetValue("r_max_size", realmaxsize);
 881                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 882                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 883                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
 884                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
 885                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
 886                 for (image->depth >>= r_picmip.integer;image->depth > r_max_size.integer;image->depth >>= 1);
 887                 if (image->width < 1) image->width = 1;
 888                 if (image->height < 1) image->height = 1;
 889                 if (image->depth < 1) image->depth = 1;
 890         }
 891         image->texturetype = glt->texturetype;
 892         image->glinternalformat = texinfo->glinternalformat;
 893         image->glformat = texinfo->glformat;
 894         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP)) | GLTEXF_UPLOAD;
 895         image->bytesperpixel = texinfo->internalbytesperpixel;
 896         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 897         // get a texture number to use
 898         qglGenTextures(1, &image->texnum);
 899         *imagechainpointer = image;
 900         image->texturecount++;
 901
 902         glt->x = x;
 903         glt->y = y;
 904         glt->y = z;
 905         glt->image = image;
 906 }
 907
 908 // note: R_FindImageForTexture must be called before this
 909 static void R_UploadTexture (gltexture_t *glt)
 910 {
 911         if (!(glt->flags & GLTEXF_UPLOAD))
 912                 return;
 913
 914         R_Upload(glt, glt->inputtexels);
 915         if (glt->inputtexels)
 916         {
 917                 Mem_Free(glt->inputtexels);
 918                 glt->inputtexels = NULL;
 919                 glt->flags |= GLTEXF_DESTROYED;
 920         }
 921         else if (glt->flags & GLTEXF_DESTROYED)
 922                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 923 }
 924
 925 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)
 926 {
 927         int i, size;
 928         gltexture_t *glt;
 929         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 930         textypeinfo_t *texinfo;
 931
 932         if (cls.state == ca_dedicated)
 933                 return NULL;
 934
 935         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
 936                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
 937         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 938                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
 939         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 940                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
 941
 942         /*
 943         glt = R_FindTexture (pool, identifier);
 944         if (glt)
 945         {
 946                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
 947                 R_FreeTexture((rtexture_t *)glt);
 948         }
 949         */
 950
 951         texinfo = R_GetTexTypeInfo(textype, flags);
 952         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 953
 954         // clear the alpha flag if the texture has no transparent pixels
 955         switch(textype)
 956         {
 957         case TEXTYPE_PALETTE:
 958                 if (flags & TEXF_ALPHA)
 959                 {
 960                         flags &= ~TEXF_ALPHA;
 961                         if (data)
 962                         {
 963                                 for (i = 0;i < size;i++)
 964                                 {
 965                                         if (((qbyte *)&palette[data[i]])[3] == 255)
 966                                         {
 967                                                 flags |= TEXF_ALPHA;
 968                                                 break;
 969                                         }
 970                                 }
 971                         }
 972                 }
 973                 break;
 974         case TEXTYPE_RGB:
 975                 if (flags & TEXF_ALPHA)
 976                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
 977                 break;
 978         case TEXTYPE_RGBA:
 979                 if (flags & TEXF_ALPHA)
 980                 {
 981                         flags &= ~TEXF_ALPHA;
 982                         if (data)
 983                         {
 984                                 for (i = 3;i < size;i += 4)
 985                                 {
 986                                         if (data[i] < 255)
 987                                         {
 988                                                 flags |= TEXF_ALPHA;
 989                                                 break;
 990                                         }
 991                                 }
 992                         }
 993                 }
 994                 break;
 995         default:
 996                 Host_Error("R_LoadTexture: unknown texture type\n");
 997         }
 998
 999         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1000         if (identifier)
1001         {
1002                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1003                 strcpy (glt->identifier, identifier);
1004         }
1005         else
1006                 glt->identifier = NULL;
1007         glt->pool = pool;
1008         glt->chain = pool->gltchain;
1009         pool->gltchain = glt;
1010         glt->width = width;
1011         glt->height = height;
1012         glt->depth = depth;
1013         glt->flags = flags | GLTEXF_UPLOAD;
1014         glt->textype = texinfo;
1015         glt->texturetype = texturetype;
1016         glt->inputdatasize = size;
1017         glt->palette = palette;
1018
1019         if (data)
1020         {
1021                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1022                 if (glt->inputtexels == NULL)
1023                         Sys_Error("R_SetupTexture: out of memory\n");
1024                 memcpy(glt->inputtexels, data, size);
1025         }
1026         else
1027                 glt->inputtexels = NULL;
1028
1029         R_FindImageForTexture(glt);
1030         R_PrecacheTexture(glt);
1031
1032         return (rtexture_t *)glt;
1033 }
1034
1035 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1036 {
1037         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1038 }
1039
1040 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)
1041 {
1042         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1043 }
1044
1045 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)
1046 {
1047         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1048 }
1049
1050 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1051 {
1052         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1053 }
1054
1055 int R_TextureHasAlpha(rtexture_t *rt)
1056 {
1057         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1058 }
1059
1060 int R_TextureWidth(rtexture_t *rt)
1061 {
1062         return rt ? ((gltexture_t *)rt)->width : 0;
1063 }
1064
1065 int R_TextureHeight(rtexture_t *rt)
1066 {
1067         return rt ? ((gltexture_t *)rt)->height : 0;
1068 }
1069
1070 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1071 {
1072         gltexture_t *glt;
1073         float iwidth, iheight, idepth;
1074         if (cls.state == ca_dedicated)
1075         {
1076                 if (x)
1077                         *x = 0;
1078                 if (y)
1079                         *y = 0;
1080                 if (z)
1081                         *z = 0;
1082                 if (fx1 || fy1 || fx2 || fy2)
1083                 {
1084                         if (fx1)
1085                                 *fx1 = 0;
1086                         if (fy1)
1087                                 *fy1 = 0;
1088                         if (fz1)
1089                                 *fz1 = 0;
1090                         if (fx2)
1091                                 *fx2 = 1;
1092                         if (fy2)
1093                                 *fy2 = 1;
1094                         if (fz2)
1095                                 *fz2 = 1;
1096                 }
1097                 return;
1098         }
1099         if (!rt)
1100                 Host_Error("R_FragmentLocation: no texture supplied\n");
1101         glt = (gltexture_t *)rt;
1102         if (glt->flags & TEXF_FRAGMENT)
1103         {
1104                 if (x)
1105                         *x = glt->x;
1106                 if (y)
1107                         *y = glt->y;
1108                 if (fx1 || fy1 || fx2 || fy2)
1109                 {
1110                         iwidth = 1.0f / glt->image->width;
1111                         iheight = 1.0f / glt->image->height;
1112                         idepth = 1.0f / glt->image->depth;
1113                         if (fx1)
1114                                 *fx1 = glt->x * iwidth;
1115                         if (fy1)
1116                                 *fy1 = glt->y * iheight;
1117                         if (fz1)
1118                                 *fz1 = glt->z * idepth;
1119                         if (fx2)
1120                                 *fx2 = (glt->x + glt->width) * iwidth;
1121                         if (fy2)
1122                                 *fy2 = (glt->y + glt->height) * iheight;
1123                         if (fz2)
1124                                 *fz2 = (glt->z + glt->depth) * idepth;
1125                 }
1126         }
1127         else
1128         {
1129                 if (x)
1130                         *x = 0;
1131                 if (y)
1132                         *y = 0;
1133                 if (z)
1134                         *z = 0;
1135                 if (fx1 || fy1 || fx2 || fy2)
1136                 {
1137                         if (fx1)
1138                                 *fx1 = 0;
1139                         if (fy1)
1140                                 *fy1 = 0;
1141                         if (fz1)
1142                                 *fz1 = 0;
1143                         if (fx2)
1144                                 *fx2 = 1;
1145                         if (fy2)
1146                                 *fy2 = 1;
1147                         if (fz2)
1148                                 *fz2 = 1;
1149                 }
1150         }
1151 }
1152
1153 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1154 {
1155         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1156 }
1157
1158 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1159 {
1160         return width;
1161 }
1162
1163 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1164 {
1165         gltexture_t *glt;
1166         if (rt == NULL)
1167                 Host_Error("R_UpdateTexture: no texture supplied\n");
1168         if (data == NULL)
1169                 Host_Error("R_UpdateTexture: no data supplied\n");
1170         glt = (gltexture_t *)rt;
1171
1172         // if it has not been uploaded yet, update the data that will be used when it is
1173         if (glt->inputtexels)
1174                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1175         else
1176                 R_Upload(glt, data);
1177 }
1178