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         if (glt->image)
 226         {
 227                 image = glt->image;
 228                 image->texturecount--;
 229                 if (image->texturecount < 1)
 230                 {
 231                         for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 232                         if (*gltimagepointer == image)
 233                                 *gltimagepointer = image->imagechain;
 234                         else
 235                                 Host_Error("R_FreeTexture: image not linked in pool\n");
 236                         if (image->texnum)
 237                                 qglDeleteTextures(1, &image->texnum);
 238                         if (image->blockallocation)
 239                                 Mem_Free(image->blockallocation);
 240                         Mem_Free(image);
 241                 }
 242         }
 243
 244         if (glt->identifier)
 245                 Mem_Free(glt->identifier);
 246         if (glt->inputtexels)
 247                 Mem_Free(glt->inputtexels);
 248         Mem_Free(glt);
 249 }
 250
 251 /*
 252 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 253 {
 254         gltexture_t     *glt;
 255
 256         if (!identifier)
 257                 return NULL;
 258
 259         for (glt = pool->gltchain;glt;glt = glt->chain)
 260                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 261                         return glt;
 262
 263         return NULL;
 264 }
 265 */
 266
 267 rtexturepool_t *R_AllocTexturePool(void)
 268 {
 269         gltexturepool_t *pool;
 270         if (texturemempool == NULL)
 271                 return NULL;
 272         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 273         if (pool == NULL)
 274                 return NULL;
 275         pool->next = gltexturepoolchain;
 276         gltexturepoolchain = pool;
 277         pool->sentinel = TEXTUREPOOL_SENTINEL;
 278         return (rtexturepool_t *)pool;
 279 }
 280
 281 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 282 {
 283         gltexturepool_t *pool, **poolpointer;
 284         if (rtexturepool == NULL)
 285                 return;
 286         if (*rtexturepool == NULL)
 287                 return;
 288         pool = (gltexturepool_t *)(*rtexturepool);
 289         *rtexturepool = NULL;
 290         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 291                 Host_Error("R_FreeTexturePool: pool already freed\n");
 292         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 293         if (*poolpointer == pool)
 294                 *poolpointer = pool->next;
 295         else
 296                 Host_Error("R_FreeTexturePool: pool not linked\n");
 297         while (pool->gltchain)
 298                 R_FreeTexture((rtexture_t *)pool->gltchain);
 299         if (pool->imagechain)
 300                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 301         Mem_Free(pool);
 302 }
 303
 304
 305 typedef struct
 306 {
 307         char *name;
 308         int minification, magnification;
 309 }
 310 glmode_t;
 311
 312 static glmode_t modes[] =
 313 {
 314         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 315         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 316         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 317         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 318         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 319         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 320 };
 321
 322 extern int gl_backend_rebindtextures;
 323
 324 static void GL_TextureMode_f (void)
 325 {
 326         int i;
 327         gltextureimage_t *image;
 328         gltexturepool_t *pool;
 329
 330         if (Cmd_Argc() == 1)
 331         {
 332                 for (i = 0;i < 6;i++)
 333                 {
 334                         if (gl_filter_min == modes[i].minification)
 335                         {
 336                                 Con_Printf ("%s\n", modes[i].name);
 337                                 return;
 338                         }
 339                 }
 340                 Con_Printf ("current filter is unknown???\n");
 341                 return;
 342         }
 343
 344         for (i = 0;i < 6;i++)
 345                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 346                         break;
 347         if (i == 6)
 348         {
 349                 Con_Printf ("bad filter name\n");
 350                 return;
 351         }
 352
 353         gl_filter_min = modes[i].minification;
 354         gl_filter_mag = modes[i].magnification;
 355
 356         // change all the existing mipmap texture objects
 357         // FIXME: force renderer(/client/something?) restart instead?
 358         for (pool = gltexturepoolchain;pool;pool = pool->next)
 359         {
 360                 for (image = pool->imagechain;image;image = image->imagechain)
 361                 {
 362                         // only update already uploaded images
 363                         if (!(image->flags & GLTEXF_UPLOAD))
 364                         {
 365                                 qglBindTexture(GL_TEXTURE_2D, image->texnum);
 366                                 if (image->flags & TEXF_MIPMAP)
 367                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 368                                 else
 369                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 370                                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 371                         }
 372                 }
 373         }
 374         gl_backend_rebindtextures = true;
 375 }
 376
 377 static int R_CalcTexelDataSize (gltexture_t *glt)
 378 {
 379         int width2, height2, depth2, size;
 380         if (glt->flags & TEXF_FRAGMENT)
 381                 size = glt->width * glt->height * glt->depth;
 382         else
 383         {
 384                 if (r_max_size.integer > realmaxsize)
 385                         Cvar_SetValue("r_max_size", realmaxsize);
 386                 // calculate final size
 387                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 388                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 389                 for (depth2 = 1;depth2 < glt->depth;depth2 <<= 1);
 390                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
 391                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
 392                 for (depth2 >>= r_picmip.integer;depth2 > r_max_size.integer;depth2 >>= 1);
 393                 if (width2 < 1) width2 = 1;
 394                 if (height2 < 1) height2 = 1;
 395                 if (depth2 < 1) depth2 = 1;
 396
 397                 size = 0;
 398                 if (glt->flags & TEXF_MIPMAP)
 399                 {
 400                         while (width2 > 1 || height2 > 1 || depth2 > 1)
 401                         {
 402                                 size += width2 * height2 * depth2;
 403                                 if (width2 > 1)
 404                                         width2 >>= 1;
 405                                 if (height2 > 1)
 406                                         height2 >>= 1;
 407                                 if (depth2 > 1)
 408                                         depth2 >>= 1;
 409                         }
 410                         size++; // count the last 1x1 mipmap
 411                 }
 412                 else
 413                         size = width2 * height2 * depth2;
 414         }
 415         size *= glt->textype->internalbytesperpixel * glt->image->sides;
 416
 417         return size;
 418 }
 419
 420 void R_TextureStats_PrintTotal(void)
 421 {
 422         int glsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 423         gltexture_t *glt;
 424         gltexturepool_t *pool;
 425         for (pool = gltexturepoolchain;pool;pool = pool->next)
 426         {
 427                 for (glt = pool->gltchain;glt;glt = glt->chain)
 428                 {
 429                         glsize = R_CalcTexelDataSize(glt);
 430                         total++;
 431                         totalt += glsize;
 432                         totalp += glt->inputdatasize;
 433                         if (!(glt->flags & GLTEXF_UPLOAD))
 434                         {
 435                                 loaded++;
 436                                 loadedt += glsize;
 437                                 loadedp += glt->inputdatasize;
 438                         }
 439                 }
 440         }
 441         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);
 442 }
 443
 444 static void R_TextureStats_f(void)
 445 {
 446         int loaded;
 447         gltexture_t *glt;
 448         gltexturepool_t *pool;
 449         Con_Printf("glsize input loaded mip alpha name\n");
 450         for (pool = gltexturepoolchain;pool;pool = pool->next)
 451         {
 452                 for (glt = pool->gltchain;glt;glt = glt->chain)
 453                 {
 454                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 455                         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>");
 456                 }
 457                 Con_Printf("pool %10p\n", pool);
 458         }
 459         R_TextureStats_PrintTotal();
 460 }
 461
 462 char engineversion[40];
 463
 464 static void r_textures_start(void)
 465 {
 466         // deal with size limits of various drivers (3dfx in particular)
 467         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 468         CHECKGLERROR
 469         // LordHavoc: allow any alignment
 470         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 471         CHECKGLERROR
 472
 473         // use the largest scrap texture size we can (not sure if this is really a good idea)
 474         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
 475
 476         texturemempool = Mem_AllocPool("Texture Info");
 477         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
 478         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
 479 }
 480
 481 static void r_textures_shutdown(void)
 482 {
 483         rtexturepool_t *temp;
 484         while(gltexturepoolchain)
 485         {
 486                 temp = (rtexturepool_t *) gltexturepoolchain;
 487                 R_FreeTexturePool(&temp);
 488         }
 489
 490         resizebuffersize = 0;
 491         texturebuffersize = 0;
 492         resizebuffer = NULL;
 493         colorconvertbuffer = NULL;
 494         texturebuffer = NULL;
 495         Mem_FreePool(&texturemempool);
 496         Mem_FreePool(&texturedatamempool);
 497         Mem_FreePool(&textureprocessingmempool);
 498 }
 499
 500 static void r_textures_newmap(void)
 501 {
 502 }
 503
 504 void R_Textures_Init (void)
 505 {
 506         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
 507         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 508         Cvar_RegisterVariable (&r_max_scrapsize);
 509         Cvar_RegisterVariable (&r_max_size);
 510         Cvar_RegisterVariable (&r_picmip);
 511         Cvar_RegisterVariable (&r_lerpimages);
 512         Cvar_RegisterVariable (&r_precachetextures);
 513
 514         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 515 }
 516
 517 void R_Textures_Frame (void)
 518 {
 519         // could do procedural texture animation here, if we keep track of which
 520         // textures were accessed this frame...
 521
 522         // free the resize buffers
 523         resizebuffersize = 0;
 524         if (resizebuffer)
 525         {
 526                 Mem_Free(resizebuffer);
 527                 resizebuffer = NULL;
 528         }
 529         if (colorconvertbuffer)
 530         {
 531                 Mem_Free(colorconvertbuffer);
 532                 colorconvertbuffer = NULL;
 533         }
 534 }
 535
 536 void R_MakeResizeBufferBigger(int size)
 537 {
 538         if (resizebuffersize < size)
 539         {
 540                 resizebuffersize = size;
 541                 if (resizebuffer)
 542                         Mem_Free(resizebuffer);
 543                 if (colorconvertbuffer)
 544                         Mem_Free(colorconvertbuffer);
 545                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 546                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 547                 if (!resizebuffer || !colorconvertbuffer)
 548                         Host_Error("R_Upload: out of memory\n");
 549         }
 550 }
 551
 552 static void GL_SetupTextureParameters(int flags, int texturetype)
 553 {
 554         int textureenum = gltexturetypeenums[texturetype];
 555         int wrapmode = (flags & TEXF_CLAMP) ? GL_CLAMP : GL_REPEAT;
 556
 557         CHECKGLERROR
 558
 559         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);
 560         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);
 561         if (gltexturetypedimensions[texturetype] >= 3)
 562                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);
 563
 564         if (flags & TEXF_MIPMAP)
 565                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 566         else
 567                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 568         qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 569
 570         CHECKGLERROR
 571 }
 572
 573 static void R_Upload(gltexture_t *glt, qbyte *data)
 574 {
 575         int i, mip, width, height, depth, internalformat;
 576         qbyte *prevbuffer;
 577         prevbuffer = data;
 578
 579         CHECKGLERROR
 580
 581         glt->texnum = glt->image->texnum;
 582         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 583         CHECKGLERROR
 584         glt->flags &= ~GLTEXF_UPLOAD;
 585         gl_backend_rebindtextures = true;
 586
 587         if (glt->flags & TEXF_FRAGMENT)
 588         {
 589                 if (glt->image->flags & GLTEXF_UPLOAD)
 590                 {
 591                         glt->image->flags &= ~GLTEXF_UPLOAD;
 592                         Con_DPrintf("uploaded new fragments image\n");
 593                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 594                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 595                         switch(glt->image->texturetype)
 596                         {
 597                         case GLTEXTURETYPE_1D:
 598                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 599                                 CHECKGLERROR
 600                                 break;
 601                         case GLTEXTURETYPE_2D:
 602                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 603                                 CHECKGLERROR
 604                                 break;
 605                         case GLTEXTURETYPE_3D:
 606                                 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);
 607                                 CHECKGLERROR
 608                                 break;
 609                         default:
 610                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 611                                 break;
 612                         }
 613                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 614                 }
 615
 616                 if (prevbuffer == NULL)
 617                 {
 618                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 619                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 620                         prevbuffer = resizebuffer;
 621                 }
 622                 else if (glt->textype->textype == TEXTYPE_PALETTE)
 623                 {
 624                         // promote paletted to RGBA, so we only have to worry about RGB and
 625                         // RGBA in the rest of this code
 626                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
 627                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
 628                         prevbuffer = colorconvertbuffer;
 629                 }
 630
 631                 switch(glt->image->texturetype)
 632                 {
 633                 case GLTEXTURETYPE_1D:
 634                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 635                         CHECKGLERROR
 636                         break;
 637                 case GLTEXTURETYPE_2D:
 638                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 639                         CHECKGLERROR
 640                         break;
 641                 case GLTEXTURETYPE_3D:
 642                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 643                         CHECKGLERROR
 644                         break;
 645                 default:
 646                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 647                         break;
 648                 }
 649                 glt->texnum = glt->image->texnum;
 650                 return;
 651         }
 652
 653         glt->image->flags &= ~GLTEXF_UPLOAD;
 654
 655         // these are rounded up versions of the size to do better resampling
 656         for (width  = 1;width  < glt->width ;width  <<= 1);
 657         for (height = 1;height < glt->height;height <<= 1);
 658         for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 659
 660         R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
 661
 662         if (prevbuffer == NULL)
 663         {
 664                 width = glt->image->width;
 665                 height = glt->image->height;
 666                 depth = glt->image->depth;
 667                 memset(resizebuffer, 255, width * height * depth * glt->image->bytesperpixel);
 668                 prevbuffer = resizebuffer;
 669         }
 670         else
 671         {
 672                 if (glt->textype->textype == TEXTYPE_PALETTE)
 673                 {
 674                         // promote paletted to RGBA, so we only have to worry about RGB and
 675                         // RGBA in the rest of this code
 676                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
 677                         prevbuffer = colorconvertbuffer;
 678                 }
 679         }
 680
 681         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
 682         internalformat = 3;
 683         if (glt->flags & TEXF_ALPHA)
 684                 internalformat = 4;
 685
 686         // cubemaps contain multiple images and thus get processed a bit differently
 687         if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
 688         {
 689                 if (glt->width != width || glt->height != height || glt->depth != depth)
 690                 {
 691                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 692                         prevbuffer = resizebuffer;
 693                 }
 694                 // picmip/max_size
 695                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 696                 {
 697                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 698                         prevbuffer = resizebuffer;
 699                 }
 700         }
 701         mip = 0;
 702         switch(glt->image->texturetype)
 703         {
 704         case GLTEXTURETYPE_1D:
 705                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 706                 CHECKGLERROR
 707                 if (glt->flags & TEXF_MIPMAP)
 708                 {
 709                         while (width > 1 || height > 1 || depth > 1)
 710                         {
 711                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 712                                 prevbuffer = resizebuffer;
 713                                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 714                                 CHECKGLERROR
 715                         }
 716                 }
 717                 break;
 718         case GLTEXTURETYPE_2D:
 719                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 720                 CHECKGLERROR
 721                 if (glt->flags & TEXF_MIPMAP)
 722                 {
 723                         while (width > 1 || height > 1 || depth > 1)
 724                         {
 725                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 726                                 prevbuffer = resizebuffer;
 727                                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 728                                 CHECKGLERROR
 729                         }
 730                 }
 731                 break;
 732         case GLTEXTURETYPE_3D:
 733                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 734                 CHECKGLERROR
 735                 if (glt->flags & TEXF_MIPMAP)
 736                 {
 737                         while (width > 1 || height > 1 || depth > 1)
 738                         {
 739                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 740                                 prevbuffer = resizebuffer;
 741                                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 742                                 CHECKGLERROR
 743                         }
 744                 }
 745                 break;
 746         case GLTEXTURETYPE_CUBEMAP:
 747                 // convert and upload each side in turn,
 748                 // from a continuous block of input texels
 749                 texturebuffer = prevbuffer;
 750                 for (i = 0;i < 6;i++)
 751                 {
 752                         prevbuffer = texturebuffer;
 753                         texturebuffer += width * height * depth * glt->textype->inputbytesperpixel;
 754                         if (glt->width != width || glt->height != height || glt->depth != depth)
 755                         {
 756                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 757                                 prevbuffer = resizebuffer;
 758                         }
 759                         // picmip/max_size
 760                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 761                         {
 762                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 763                                 prevbuffer = resizebuffer;
 764                         }
 765                         mip = 0;
 766                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 767                         CHECKGLERROR
 768                         if (glt->flags & TEXF_MIPMAP)
 769                         {
 770                                 while (width > 1 || height > 1 || depth > 1)
 771                                 {
 772                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 773                                         prevbuffer = resizebuffer;
 774                                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 775                                         CHECKGLERROR
 776                                 }
 777                         }
 778                 }
 779                 break;
 780         }
 781         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 782 }
 783
 784 static void R_FindImageForTexture(gltexture_t *glt)
 785 {
 786         int i, j, best, best2, x, y, z, w, h, d;
 787         textypeinfo_t *texinfo;
 788         gltexturepool_t *pool;
 789         gltextureimage_t *image, **imagechainpointer;
 790         texinfo = glt->textype;
 791         pool = glt->pool;
 792
 793         // remains -1 until uploaded
 794         glt->texnum = -1;
 795
 796         x = 0;
 797         y = 0;
 798         z = 0;
 799         w = glt->width;
 800         h = glt->height;
 801         d = glt->depth;
 802         if (glt->flags & TEXF_FRAGMENT)
 803         {
 804                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 805                 {
 806                         image = *imagechainpointer;
 807                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 808                                 continue;
 809                         if (image->texturetype != glt->texturetype)
 810                                 continue;
 811                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
 812                                 continue;
 813                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 814                                 continue;
 815                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 816                                 continue;
 817
 818                         // got a fragments texture, find a place in it if we can
 819                         for (best = image->width, i = 0;i < image->width - w;i++)
 820                         {
 821                                 for (best2 = 0, j = 0;j < w;j++)
 822                                 {
 823                                         if (image->blockallocation[i+j] >= best)
 824                                                 break;
 825                                         if (best2 < image->blockallocation[i+j])
 826                                                 best2 = image->blockallocation[i+j];
 827                                 }
 828                                 if (j == w)
 829                                 {
 830                                         // this is a valid spot
 831                                         x = i;
 832                                         y = best = best2;
 833                                 }
 834                         }
 835
 836                         if (best + h > image->height)
 837                                 continue;
 838
 839                         for (i = 0;i < w;i++)
 840                                 image->blockallocation[x + i] = best + h;
 841
 842                         glt->x = x;
 843                         glt->y = y;
 844                         glt->z = 0;
 845                         glt->image = image;
 846                         image->texturecount++;
 847                         return;
 848                 }
 849
 850                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 851                 if (image == NULL)
 852                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 853                 image->type = GLIMAGETYPE_FRAGMENTS;
 854                 // make sure the created image is big enough for the fragment
 855                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 856                 image->height = 1;
 857                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 858                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 859                 image->depth = 1;
 860                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 861                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 862                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
 863                 memset(image->blockallocation, 0, image->width * sizeof(short));
 864
 865                 x = 0;
 866                 y = 0;
 867                 z = 0;
 868                 for (i = 0;i < w;i++)
 869                         image->blockallocation[x + i] = y + h;
 870         }
 871         else
 872         {
 873                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 874
 875                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 876                 if (image == NULL)
 877                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 878                 image->type = GLIMAGETYPE_TILE;
 879                 image->blockallocation = NULL;
 880
 881                 // calculate final size
 882                 if (r_max_size.integer > realmaxsize)
 883                         Cvar_SetValue("r_max_size", realmaxsize);
 884                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 885                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 886                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
 887                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
 888                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
 889                 for (image->depth >>= r_picmip.integer;image->depth > r_max_size.integer;image->depth >>= 1);
 890                 if (image->width < 1) image->width = 1;
 891                 if (image->height < 1) image->height = 1;
 892                 if (image->depth < 1) image->depth = 1;
 893         }
 894         image->texturetype = glt->texturetype;
 895         image->glinternalformat = texinfo->glinternalformat;
 896         image->glformat = texinfo->glformat;
 897         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP)) | GLTEXF_UPLOAD;
 898         image->bytesperpixel = texinfo->internalbytesperpixel;
 899         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 900         // get a texture number to use
 901         qglGenTextures(1, &image->texnum);
 902         *imagechainpointer = image;
 903         image->texturecount++;
 904
 905         glt->x = x;
 906         glt->y = y;
 907         glt->y = z;
 908         glt->image = image;
 909 }
 910
 911 // note: R_FindImageForTexture must be called before this
 912 static void R_UploadTexture (gltexture_t *glt)
 913 {
 914         if (!(glt->flags & GLTEXF_UPLOAD))
 915                 return;
 916
 917         R_Upload(glt, glt->inputtexels);
 918         if (glt->inputtexels)
 919         {
 920                 Mem_Free(glt->inputtexels);
 921                 glt->inputtexels = NULL;
 922                 glt->flags |= GLTEXF_DESTROYED;
 923         }
 924         else if (glt->flags & GLTEXF_DESTROYED)
 925                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 926 }
 927
 928 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)
 929 {
 930         int i, size;
 931         gltexture_t *glt;
 932         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 933         textypeinfo_t *texinfo;
 934
 935         if (cls.state == ca_dedicated)
 936                 return NULL;
 937
 938         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
 939                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
 940         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 941                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
 942         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 943                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
 944
 945         /*
 946         glt = R_FindTexture (pool, identifier);
 947         if (glt)
 948         {
 949                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
 950                 R_FreeTexture((rtexture_t *)glt);
 951         }
 952         */
 953
 954         texinfo = R_GetTexTypeInfo(textype, flags);
 955         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 956
 957         // clear the alpha flag if the texture has no transparent pixels
 958         switch(textype)
 959         {
 960         case TEXTYPE_PALETTE:
 961                 if (flags & TEXF_ALPHA)
 962                 {
 963                         flags &= ~TEXF_ALPHA;
 964                         if (data)
 965                         {
 966                                 for (i = 0;i < size;i++)
 967                                 {
 968                                         if (((qbyte *)&palette[data[i]])[3] == 255)
 969                                         {
 970                                                 flags |= TEXF_ALPHA;
 971                                                 break;
 972                                         }
 973                                 }
 974                         }
 975                 }
 976                 break;
 977         case TEXTYPE_RGB:
 978                 if (flags & TEXF_ALPHA)
 979                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
 980                 break;
 981         case TEXTYPE_RGBA:
 982                 if (flags & TEXF_ALPHA)
 983                 {
 984                         flags &= ~TEXF_ALPHA;
 985                         if (data)
 986                         {
 987                                 for (i = 3;i < size;i += 4)
 988                                 {
 989                                         if (data[i] < 255)
 990                                         {
 991                                                 flags |= TEXF_ALPHA;
 992                                                 break;
 993                                         }
 994                                 }
 995                         }
 996                 }
 997                 break;
 998         default:
 999                 Host_Error("R_LoadTexture: unknown texture type\n");
1000         }
1001
1002         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1003         if (identifier)
1004         {
1005                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1006                 strcpy (glt->identifier, identifier);
1007         }
1008         else
1009                 glt->identifier = NULL;
1010         glt->pool = pool;
1011         glt->chain = pool->gltchain;
1012         pool->gltchain = glt;
1013         glt->width = width;
1014         glt->height = height;
1015         glt->depth = depth;
1016         glt->flags = flags | GLTEXF_UPLOAD;
1017         glt->textype = texinfo;
1018         glt->texturetype = texturetype;
1019         glt->inputdatasize = size;
1020         glt->palette = palette;
1021
1022         if (data)
1023         {
1024                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1025                 if (glt->inputtexels == NULL)
1026                         Sys_Error("R_SetupTexture: out of memory\n");
1027                 memcpy(glt->inputtexels, data, size);
1028         }
1029         else
1030                 glt->inputtexels = NULL;
1031
1032         R_FindImageForTexture(glt);
1033         R_PrecacheTexture(glt);
1034
1035         return (rtexture_t *)glt;
1036 }
1037
1038 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1039 {
1040         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1041 }
1042
1043 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)
1044 {
1045         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1046 }
1047
1048 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)
1049 {
1050         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1051 }
1052
1053 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1054 {
1055         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1056 }
1057
1058 int R_TextureHasAlpha(rtexture_t *rt)
1059 {
1060         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1061 }
1062
1063 int R_TextureWidth(rtexture_t *rt)
1064 {
1065         return rt ? ((gltexture_t *)rt)->width : 0;
1066 }
1067
1068 int R_TextureHeight(rtexture_t *rt)
1069 {
1070         return rt ? ((gltexture_t *)rt)->height : 0;
1071 }
1072
1073 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1074 {
1075         gltexture_t *glt;
1076         float iwidth, iheight, idepth;
1077         if (cls.state == ca_dedicated)
1078         {
1079                 if (x)
1080                         *x = 0;
1081                 if (y)
1082                         *y = 0;
1083                 if (z)
1084                         *z = 0;
1085                 if (fx1 || fy1 || fx2 || fy2)
1086                 {
1087                         if (fx1)
1088                                 *fx1 = 0;
1089                         if (fy1)
1090                                 *fy1 = 0;
1091                         if (fz1)
1092                                 *fz1 = 0;
1093                         if (fx2)
1094                                 *fx2 = 1;
1095                         if (fy2)
1096                                 *fy2 = 1;
1097                         if (fz2)
1098                                 *fz2 = 1;
1099                 }
1100                 return;
1101         }
1102         if (!rt)
1103                 Host_Error("R_FragmentLocation: no texture supplied\n");
1104         glt = (gltexture_t *)rt;
1105         if (glt->flags & TEXF_FRAGMENT)
1106         {
1107                 if (x)
1108                         *x = glt->x;
1109                 if (y)
1110                         *y = glt->y;
1111                 if (fx1 || fy1 || fx2 || fy2)
1112                 {
1113                         iwidth = 1.0f / glt->image->width;
1114                         iheight = 1.0f / glt->image->height;
1115                         idepth = 1.0f / glt->image->depth;
1116                         if (fx1)
1117                                 *fx1 = glt->x * iwidth;
1118                         if (fy1)
1119                                 *fy1 = glt->y * iheight;
1120                         if (fz1)
1121                                 *fz1 = glt->z * idepth;
1122                         if (fx2)
1123                                 *fx2 = (glt->x + glt->width) * iwidth;
1124                         if (fy2)
1125                                 *fy2 = (glt->y + glt->height) * iheight;
1126                         if (fz2)
1127                                 *fz2 = (glt->z + glt->depth) * idepth;
1128                 }
1129         }
1130         else
1131         {
1132                 if (x)
1133                         *x = 0;
1134                 if (y)
1135                         *y = 0;
1136                 if (z)
1137                         *z = 0;
1138                 if (fx1 || fy1 || fx2 || fy2)
1139                 {
1140                         if (fx1)
1141                                 *fx1 = 0;
1142                         if (fy1)
1143                                 *fy1 = 0;
1144                         if (fz1)
1145                                 *fz1 = 0;
1146                         if (fx2)
1147                                 *fx2 = 1;
1148                         if (fy2)
1149                                 *fy2 = 1;
1150                         if (fz2)
1151                                 *fz2 = 1;
1152                 }
1153         }
1154 }
1155
1156 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1157 {
1158         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1159 }
1160
1161 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1162 {
1163         return width;
1164 }
1165
1166 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1167 {
1168         gltexture_t *glt;
1169         if (rt == NULL)
1170                 Host_Error("R_UpdateTexture: no texture supplied\n");
1171         if (data == NULL)
1172                 Host_Error("R_UpdateTexture: no data supplied\n");
1173         glt = (gltexture_t *)rt;
1174
1175         // if it has not been uploaded yet, update the data that will be used when it is
1176         if (glt->inputtexels)
1177                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1178         else
1179                 R_Upload(glt, data);
1180 }
1181