gl_textures.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5
   6 cvar_t  r_max_size = {CVAR_SAVE, "r_max_size", "2048"};
   7 cvar_t  r_max_scrapsize = {CVAR_SAVE, "r_max_scrapsize", "256"};
   8 cvar_t  r_picmip = {CVAR_SAVE, "r_picmip", "0"};
   9 cvar_t  r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
  10 cvar_t  r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
  11
  12 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  13 int             gl_filter_mag = GL_LINEAR;
  14
  15
  16 static mempool_t *texturemempool;
  17 static mempool_t *texturedatamempool;
  18 static mempool_t *textureprocessingmempool;
  19
  20 // note: this must not conflict with TEXF_ flags in r_textures.h
  21 // cleared when a texture is uploaded
  22 #define GLTEXF_UPLOAD 0x00010000
  23 // bitmask for mismatch checking
  24 #define GLTEXF_IMPORTANTBITS (0)
  25 // set when image is uploaded and freed
  26 #define GLTEXF_DESTROYED 0x00040000
  27
  28 // size of images which hold fragment textures, ignores picmip and max_size
  29 static int block_size;
  30
  31 typedef struct
  32 {
  33         int textype;
  34         int inputbytesperpixel;
  35         int internalbytesperpixel;
  36         int glformat;
  37         int glinternalformat;
  38 }
  39 textypeinfo_t;
  40
  41 static textypeinfo_t textype_palette       = {TEXTYPE_PALETTE, 1, 4, GL_RGBA, 3};
  42 static textypeinfo_t textype_rgb           = {TEXTYPE_RGB    , 3, 3, GL_RGB , 3};
  43 static textypeinfo_t textype_rgba          = {TEXTYPE_RGBA   , 4, 4, GL_RGBA, 3};
  44 static textypeinfo_t textype_palette_alpha = {TEXTYPE_PALETTE, 1, 4, GL_RGBA, 4};
  45 static textypeinfo_t textype_rgba_alpha    = {TEXTYPE_RGBA   , 4, 4, GL_RGBA, 4};
  46
  47 // a tiling texture (most common type)
  48 #define GLIMAGETYPE_TILE 0
  49 // a fragments texture (contains one or more fragment textures)
  50 #define GLIMAGETYPE_FRAGMENTS 1
  51
  52 #define GLTEXTURETYPE_1D 0
  53 #define GLTEXTURETYPE_2D 1
  54 #define GLTEXTURETYPE_3D 2
  55 #define GLTEXTURETYPE_CUBEMAP 3
  56
  57 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  58 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  59 static int cubemapside[6] =
  60 {
  61         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  62         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  63         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  64         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  65         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  66         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  67 };
  68
  69 // a gltextureimage can have one (or more if fragments) gltextures inside
  70 typedef struct gltextureimage_s
  71 {
  72         struct gltextureimage_s *imagechain;
  73         int texturecount;
  74         int type; // one of the GLIMAGETYPE_ values
  75         int texturetype; // one of the GLTEXTURETYPE_ values
  76         int sides; // 1 or 6 depending on texturetype
  77         int texnum; // GL texture slot number
  78         int width, height, depth; // 3D texture support
  79         int bytesperpixel; // bytes per pixel
  80         int glformat; // GL_RGB or GL_RGBA
  81         int glinternalformat; // 3 or 4
  82         int flags;
  83         short *blockallocation; // fragment allocation (2D only)
  84 }
  85 gltextureimage_t;
  86
  87 typedef struct gltexture_s
  88 {
  89         // this field is exposed to the R_GetTexture macro, for speed reasons
  90         // (must be identical in rtexture_t)
  91         int texnum; // GL texture slot number
  92
  93         // pointer to texturepool (check this to see if the texture is allocated)
  94         struct gltexturepool_s *pool;
  95         // pointer to next texture in texturepool chain
  96         struct gltexture_s *chain;
  97         // pointer into gltextureimage array
  98         gltextureimage_t *image;
  99         // name of the texture (this might be removed someday), no duplicates
 100         char *identifier;
 101         // location in the image, and size
 102         int x, y, z, width, height, depth;
 103         // copy of the original texture(s) supplied to the upload function, for
 104         // delayed uploads (non-precached)
 105         qbyte *inputtexels;
 106         // original data size in *inputtexels
 107         int inputdatasize;
 108         // flags supplied to the LoadTexture function
 109         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 110         int flags;
 111         // pointer to one of the textype_ structs
 112         textypeinfo_t *textype;
 113         // one of the GLTEXTURETYPE_ values
 114         int texturetype;
 115         // palette if the texture is TEXTYPE_PALETTE
 116         const unsigned int *palette;
 117 }
 118 gltexture_t;
 119
 120 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 121
 122 typedef struct gltexturepool_s
 123 {
 124         unsigned int sentinel;
 125         struct gltextureimage_s *imagechain;
 126         struct gltexture_s *gltchain;
 127         struct gltexturepool_s *next;
 128 }
 129 gltexturepool_t;
 130
 131 static gltexturepool_t *gltexturepoolchain = NULL;
 132
 133 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
 134 static int resizebuffersize = 0;
 135 static qbyte *texturebuffer;
 136 static int texturebuffersize = 0;
 137
 138 static int realmaxsize = 0;
 139
 140 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 141 {
 142         if (flags & TEXF_ALPHA)
 143         {
 144                 switch(textype)
 145                 {
 146                 case TEXTYPE_PALETTE:
 147                         return &textype_palette_alpha;
 148                 case TEXTYPE_RGB:
 149                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
 150                         return NULL;
 151                 case TEXTYPE_RGBA:
 152                         return &textype_rgba_alpha;
 153                 default:
 154                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 155                         return NULL;
 156                 }
 157         }
 158         else
 159         {
 160                 switch(textype)
 161                 {
 162                 case TEXTYPE_PALETTE:
 163                         return &textype_palette;
 164                 case TEXTYPE_RGB:
 165                         return &textype_rgb;
 166                 case TEXTYPE_RGBA:
 167                         return &textype_rgba;
 168                 default:
 169                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 170                         return NULL;
 171                 }
 172         }
 173 }
 174
 175 static void R_UploadTexture(gltexture_t *t);
 176
 177 static void R_PrecacheTexture(gltexture_t *glt)
 178 {
 179         int precache;
 180         precache = false;
 181         if (glt->flags & TEXF_ALWAYSPRECACHE)
 182                 precache = true;
 183         else if (r_precachetextures.integer >= 2)
 184                 precache = true;
 185         else if (r_precachetextures.integer >= 1)
 186                 if (glt->flags & TEXF_PRECACHE)
 187                         precache = true;
 188
 189         if (precache)
 190                 R_UploadTexture(glt);
 191 }
 192
 193 int R_RealGetTexture(rtexture_t *rt)
 194 {
 195         if (rt)
 196         {
 197                 gltexture_t *glt;
 198                 glt = (gltexture_t *)rt;
 199                 if (glt->flags & GLTEXF_UPLOAD)
 200                         R_UploadTexture(glt);
 201                 glt->texnum = glt->image->texnum;
 202                 return glt->image->texnum;
 203         }
 204         else
 205                 return 0;
 206 }
 207
 208 void R_FreeTexture(rtexture_t *rt)
 209 {
 210         gltexture_t *glt, **gltpointer;
 211         gltextureimage_t *image, **gltimagepointer;
 212
 213         glt = (gltexture_t *)rt;
 214         if (glt == NULL)
 215                 Host_Error("R_FreeTexture: texture == NULL\n");
 216
 217         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 218         if (*gltpointer == glt)
 219                 *gltpointer = glt->chain;
 220         else
 221                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
 222
 223         // note: if freeing a fragment texture, this will not make the claimed
 224         // space available for new textures unless all other fragments in the
 225         // image are also freed
 226         if (glt->image)
 227         {
 228                 image = glt->image;
 229                 image->texturecount--;
 230                 if (image->texturecount < 1)
 231                 {
 232                         for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 233                         if (*gltimagepointer == image)
 234                                 *gltimagepointer = image->imagechain;
 235                         else
 236                                 Host_Error("R_FreeTexture: image not linked in pool\n");
 237                         if (image->texnum)
 238                                 qglDeleteTextures(1, &image->texnum);
 239                         if (image->blockallocation)
 240                                 Mem_Free(image->blockallocation);
 241                         Mem_Free(image);
 242                 }
 243         }
 244
 245         if (glt->identifier)
 246                 Mem_Free(glt->identifier);
 247         if (glt->inputtexels)
 248                 Mem_Free(glt->inputtexels);
 249         Mem_Free(glt);
 250 }
 251
 252 /*
 253 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 254 {
 255         gltexture_t     *glt;
 256
 257         if (!identifier)
 258                 return NULL;
 259
 260         for (glt = pool->gltchain;glt;glt = glt->chain)
 261                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 262                         return glt;
 263
 264         return NULL;
 265 }
 266 */
 267
 268 rtexturepool_t *R_AllocTexturePool(void)
 269 {
 270         gltexturepool_t *pool;
 271         if (texturemempool == NULL)
 272                 return NULL;
 273         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 274         if (pool == NULL)
 275                 return NULL;
 276         pool->next = gltexturepoolchain;
 277         gltexturepoolchain = pool;
 278         pool->sentinel = TEXTUREPOOL_SENTINEL;
 279         return (rtexturepool_t *)pool;
 280 }
 281
 282 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 283 {
 284         gltexturepool_t *pool, **poolpointer;
 285         if (rtexturepool == NULL)
 286                 return;
 287         if (*rtexturepool == NULL)
 288                 return;
 289         pool = (gltexturepool_t *)(*rtexturepool);
 290         *rtexturepool = NULL;
 291         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 292                 Host_Error("R_FreeTexturePool: pool already freed\n");
 293         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 294         if (*poolpointer == pool)
 295                 *poolpointer = pool->next;
 296         else
 297                 Host_Error("R_FreeTexturePool: pool not linked\n");
 298         while (pool->gltchain)
 299                 R_FreeTexture((rtexture_t *)pool->gltchain);
 300         if (pool->imagechain)
 301                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 302         Mem_Free(pool);
 303 }
 304
 305
 306 typedef struct
 307 {
 308         char *name;
 309         int minification, magnification;
 310 }
 311 glmode_t;
 312
 313 static glmode_t modes[] =
 314 {
 315         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 316         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 317         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 318         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 319         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 320         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 321 };
 322
 323 extern int gl_backend_rebindtextures;
 324
 325 static void GL_TextureMode_f (void)
 326 {
 327         int i;
 328         gltextureimage_t *image;
 329         gltexturepool_t *pool;
 330
 331         if (Cmd_Argc() == 1)
 332         {
 333                 for (i = 0;i < 6;i++)
 334                 {
 335                         if (gl_filter_min == modes[i].minification)
 336                         {
 337                                 Con_Printf ("%s\n", modes[i].name);
 338                                 return;
 339                         }
 340                 }
 341                 Con_Printf ("current filter is unknown???\n");
 342                 return;
 343         }
 344
 345         for (i = 0;i < 6;i++)
 346                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 347                         break;
 348         if (i == 6)
 349         {
 350                 Con_Printf ("bad filter name\n");
 351                 return;
 352         }
 353
 354         gl_filter_min = modes[i].minification;
 355         gl_filter_mag = modes[i].magnification;
 356
 357         // change all the existing mipmap texture objects
 358         // FIXME: force renderer(/client/something?) restart instead?
 359         for (pool = gltexturepoolchain;pool;pool = pool->next)
 360         {
 361                 for (image = pool->imagechain;image;image = image->imagechain)
 362                 {
 363                         // only update already uploaded images
 364                         if (!(image->flags & GLTEXF_UPLOAD))
 365                         {
 366                                 qglBindTexture(GL_TEXTURE_2D, image->texnum);
 367                                 if (image->flags & TEXF_MIPMAP)
 368                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 369                                 else
 370                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 371                                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 372                         }
 373                 }
 374         }
 375         gl_backend_rebindtextures = true;
 376 }
 377
 378 static int R_CalcTexelDataSize (gltexture_t *glt)
 379 {
 380         int width2, height2, depth2, size;
 381         if (glt->flags & TEXF_FRAGMENT)
 382                 size = glt->width * glt->height * glt->depth;
 383         else
 384         {
 385                 if (r_max_size.integer > realmaxsize)
 386                         Cvar_SetValue("r_max_size", realmaxsize);
 387                 // calculate final size
 388                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 389                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 390                 for (depth2 = 1;depth2 < glt->depth;depth2 <<= 1);
 391                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
 392                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
 393                 for (depth2 >>= r_picmip.integer;depth2 > r_max_size.integer;depth2 >>= 1);
 394                 if (width2 < 1) width2 = 1;
 395                 if (height2 < 1) height2 = 1;
 396                 if (depth2 < 1) depth2 = 1;
 397
 398                 size = 0;
 399                 if (glt->flags & TEXF_MIPMAP)
 400                 {
 401                         while (width2 > 1 || height2 > 1 || depth2 > 1)
 402                         {
 403                                 size += width2 * height2 * depth2;
 404                                 if (width2 > 1)
 405                                         width2 >>= 1;
 406                                 if (height2 > 1)
 407                                         height2 >>= 1;
 408                                 if (depth2 > 1)
 409                                         depth2 >>= 1;
 410                         }
 411                         size++; // count the last 1x1 mipmap
 412                 }
 413                 else
 414                         size = width2 * height2 * depth2;
 415         }
 416         size *= glt->textype->internalbytesperpixel * glt->image->sides;
 417
 418         return size;
 419 }
 420
 421 void R_TextureStats_PrintTotal(void)
 422 {
 423         int glsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 424         gltexture_t *glt;
 425         gltexturepool_t *pool;
 426         for (pool = gltexturepoolchain;pool;pool = pool->next)
 427         {
 428                 for (glt = pool->gltchain;glt;glt = glt->chain)
 429                 {
 430                         glsize = R_CalcTexelDataSize(glt);
 431                         total++;
 432                         totalt += glsize;
 433                         totalp += glt->inputdatasize;
 434                         if (!(glt->flags & GLTEXF_UPLOAD))
 435                         {
 436                                 loaded++;
 437                                 loadedt += glsize;
 438                                 loadedp += glt->inputdatasize;
 439                         }
 440                 }
 441         }
 442         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);
 443 }
 444
 445 static void R_TextureStats_f(void)
 446 {
 447         int loaded;
 448         gltexture_t *glt;
 449         gltexturepool_t *pool;
 450         Con_Printf("glsize input loaded mip alpha name\n");
 451         for (pool = gltexturepoolchain;pool;pool = pool->next)
 452         {
 453                 for (glt = pool->gltchain;glt;glt = glt->chain)
 454                 {
 455                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 456                         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>");
 457                 }
 458                 Con_Printf("pool %10p\n", pool);
 459         }
 460         R_TextureStats_PrintTotal();
 461 }
 462
 463 char engineversion[40];
 464
 465 static void r_textures_start(void)
 466 {
 467         // deal with size limits of various drivers (3dfx in particular)
 468         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 469         CHECKGLERROR
 470         // LordHavoc: allow any alignment
 471         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 472         CHECKGLERROR
 473
 474         // use the largest scrap texture size we can (not sure if this is really a good idea)
 475         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
 476
 477         texturemempool = Mem_AllocPool("Texture Info");
 478         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
 479         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
 480
 481         JPEG_OpenLibrary ();
 482 }
 483
 484 static void r_textures_shutdown(void)
 485 {
 486         rtexturepool_t *temp;
 487
 488         JPEG_CloseLibrary ();
 489
 490         while(gltexturepoolchain)
 491         {
 492                 temp = (rtexturepool_t *) gltexturepoolchain;
 493                 R_FreeTexturePool(&temp);
 494         }
 495
 496         resizebuffersize = 0;
 497         texturebuffersize = 0;
 498         resizebuffer = NULL;
 499         colorconvertbuffer = NULL;
 500         texturebuffer = NULL;
 501         Mem_FreePool(&texturemempool);
 502         Mem_FreePool(&texturedatamempool);
 503         Mem_FreePool(&textureprocessingmempool);
 504 }
 505
 506 static void r_textures_newmap(void)
 507 {
 508 }
 509
 510 void R_Textures_Init (void)
 511 {
 512         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
 513         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 514         Cvar_RegisterVariable (&r_max_scrapsize);
 515         Cvar_RegisterVariable (&r_max_size);
 516         Cvar_RegisterVariable (&r_picmip);
 517         Cvar_RegisterVariable (&r_lerpimages);
 518         Cvar_RegisterVariable (&r_precachetextures);
 519
 520         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 521 }
 522
 523 void R_Textures_Frame (void)
 524 {
 525         // could do procedural texture animation here, if we keep track of which
 526         // textures were accessed this frame...
 527
 528         // free the resize buffers
 529         resizebuffersize = 0;
 530         if (resizebuffer)
 531         {
 532                 Mem_Free(resizebuffer);
 533                 resizebuffer = NULL;
 534         }
 535         if (colorconvertbuffer)
 536         {
 537                 Mem_Free(colorconvertbuffer);
 538                 colorconvertbuffer = NULL;
 539         }
 540 }
 541
 542 void R_MakeResizeBufferBigger(int size)
 543 {
 544         if (resizebuffersize < size)
 545         {
 546                 resizebuffersize = size;
 547                 if (resizebuffer)
 548                         Mem_Free(resizebuffer);
 549                 if (colorconvertbuffer)
 550                         Mem_Free(colorconvertbuffer);
 551                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 552                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 553                 if (!resizebuffer || !colorconvertbuffer)
 554                         Host_Error("R_Upload: out of memory\n");
 555         }
 556 }
 557
 558 static void GL_SetupTextureParameters(int flags, int texturetype)
 559 {
 560         int textureenum = gltexturetypeenums[texturetype];
 561         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 562
 563         CHECKGLERROR
 564
 565         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);
 566         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);
 567         if (gltexturetypedimensions[texturetype] >= 3)
 568                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);
 569
 570         if (flags & TEXF_MIPMAP)
 571                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 572         else
 573                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 574         qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 575
 576         CHECKGLERROR
 577 }
 578
 579 static void R_Upload(gltexture_t *glt, qbyte *data)
 580 {
 581         int i, mip, width, height, depth, internalformat;
 582         qbyte *prevbuffer;
 583         prevbuffer = data;
 584
 585         CHECKGLERROR
 586
 587         glt->texnum = glt->image->texnum;
 588         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 589         CHECKGLERROR
 590         glt->flags &= ~GLTEXF_UPLOAD;
 591         gl_backend_rebindtextures = true;
 592
 593         if (glt->flags & TEXF_FRAGMENT)
 594         {
 595                 if (glt->image->flags & GLTEXF_UPLOAD)
 596                 {
 597                         glt->image->flags &= ~GLTEXF_UPLOAD;
 598                         Con_DPrintf("uploaded new fragments image\n");
 599                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 600                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 601                         switch(glt->image->texturetype)
 602                         {
 603                         case GLTEXTURETYPE_1D:
 604                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 605                                 CHECKGLERROR
 606                                 break;
 607                         case GLTEXTURETYPE_2D:
 608                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 609                                 CHECKGLERROR
 610                                 break;
 611                         case GLTEXTURETYPE_3D:
 612                                 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);
 613                                 CHECKGLERROR
 614                                 break;
 615                         default:
 616                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 617                                 break;
 618                         }
 619                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 620                 }
 621
 622                 if (prevbuffer == NULL)
 623                 {
 624                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 625                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 626                         prevbuffer = resizebuffer;
 627                 }
 628                 else if (glt->textype->textype == TEXTYPE_PALETTE)
 629                 {
 630                         // promote paletted to RGBA, so we only have to worry about RGB and
 631                         // RGBA in the rest of this code
 632                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
 633                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
 634                         prevbuffer = colorconvertbuffer;
 635                 }
 636
 637                 switch(glt->image->texturetype)
 638                 {
 639                 case GLTEXTURETYPE_1D:
 640                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 641                         CHECKGLERROR
 642                         break;
 643                 case GLTEXTURETYPE_2D:
 644                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 645                         CHECKGLERROR
 646                         break;
 647                 case GLTEXTURETYPE_3D:
 648                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 649                         CHECKGLERROR
 650                         break;
 651                 default:
 652                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 653                         break;
 654                 }
 655                 glt->texnum = glt->image->texnum;
 656                 return;
 657         }
 658
 659         glt->image->flags &= ~GLTEXF_UPLOAD;
 660
 661         // these are rounded up versions of the size to do better resampling
 662         for (width  = 1;width  < glt->width ;width  <<= 1);
 663         for (height = 1;height < glt->height;height <<= 1);
 664         for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 665
 666         R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
 667
 668         if (prevbuffer == NULL)
 669         {
 670                 width = glt->image->width;
 671                 height = glt->image->height;
 672                 depth = glt->image->depth;
 673                 memset(resizebuffer, 255, width * height * depth * glt->image->bytesperpixel);
 674                 prevbuffer = resizebuffer;
 675         }
 676         else
 677         {
 678                 if (glt->textype->textype == TEXTYPE_PALETTE)
 679                 {
 680                         // promote paletted to RGBA, so we only have to worry about RGB and
 681                         // RGBA in the rest of this code
 682                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
 683                         prevbuffer = colorconvertbuffer;
 684                 }
 685         }
 686
 687         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
 688         internalformat = 3;
 689         if (glt->flags & TEXF_ALPHA)
 690                 internalformat = 4;
 691
 692         // cubemaps contain multiple images and thus get processed a bit differently
 693         if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
 694         {
 695                 if (glt->width != width || glt->height != height || glt->depth != depth)
 696                 {
 697                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 698                         prevbuffer = resizebuffer;
 699                 }
 700                 // picmip/max_size
 701                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 702                 {
 703                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 704                         prevbuffer = resizebuffer;
 705                 }
 706         }
 707         mip = 0;
 708         switch(glt->image->texturetype)
 709         {
 710         case GLTEXTURETYPE_1D:
 711                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 712                 CHECKGLERROR
 713                 if (glt->flags & TEXF_MIPMAP)
 714                 {
 715                         while (width > 1 || height > 1 || depth > 1)
 716                         {
 717                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 718                                 prevbuffer = resizebuffer;
 719                                 qglTexImage1D(GL_TEXTURE_1D, mip++, internalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 720                                 CHECKGLERROR
 721                         }
 722                 }
 723                 break;
 724         case GLTEXTURETYPE_2D:
 725                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 726                 CHECKGLERROR
 727                 if (glt->flags & TEXF_MIPMAP)
 728                 {
 729                         while (width > 1 || height > 1 || depth > 1)
 730                         {
 731                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 732                                 prevbuffer = resizebuffer;
 733                                 qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 734                                 CHECKGLERROR
 735                         }
 736                 }
 737                 break;
 738         case GLTEXTURETYPE_3D:
 739                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 740                 CHECKGLERROR
 741                 if (glt->flags & TEXF_MIPMAP)
 742                 {
 743                         while (width > 1 || height > 1 || depth > 1)
 744                         {
 745                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 746                                 prevbuffer = resizebuffer;
 747                                 qglTexImage3D(GL_TEXTURE_3D, mip++, internalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 748                                 CHECKGLERROR
 749                         }
 750                 }
 751                 break;
 752         case GLTEXTURETYPE_CUBEMAP:
 753                 // convert and upload each side in turn,
 754                 // from a continuous block of input texels
 755                 texturebuffer = prevbuffer;
 756                 for (i = 0;i < 6;i++)
 757                 {
 758                         prevbuffer = texturebuffer;
 759                         texturebuffer += width * height * depth * glt->textype->inputbytesperpixel;
 760                         if (glt->width != width || glt->height != height || glt->depth != depth)
 761                         {
 762                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 763                                 prevbuffer = resizebuffer;
 764                         }
 765                         // picmip/max_size
 766                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 767                         {
 768                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 769                                 prevbuffer = resizebuffer;
 770                         }
 771                         mip = 0;
 772                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 773                         CHECKGLERROR
 774                         if (glt->flags & TEXF_MIPMAP)
 775                         {
 776                                 while (width > 1 || height > 1 || depth > 1)
 777                                 {
 778                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 779                                         prevbuffer = resizebuffer;
 780                                         qglTexImage2D(cubemapside[i], mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 781                                         CHECKGLERROR
 782                                 }
 783                         }
 784                 }
 785                 break;
 786         }
 787         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 788 }
 789
 790 static void R_FindImageForTexture(gltexture_t *glt)
 791 {
 792         int i, j, best, best2, x, y, z, w, h, d;
 793         textypeinfo_t *texinfo;
 794         gltexturepool_t *pool;
 795         gltextureimage_t *image, **imagechainpointer;
 796         texinfo = glt->textype;
 797         pool = glt->pool;
 798
 799         // remains -1 until uploaded
 800         glt->texnum = -1;
 801
 802         x = 0;
 803         y = 0;
 804         z = 0;
 805         w = glt->width;
 806         h = glt->height;
 807         d = glt->depth;
 808         if (glt->flags & TEXF_FRAGMENT)
 809         {
 810                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 811                 {
 812                         image = *imagechainpointer;
 813                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 814                                 continue;
 815                         if (image->texturetype != glt->texturetype)
 816                                 continue;
 817                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
 818                                 continue;
 819                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 820                                 continue;
 821                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 822                                 continue;
 823
 824                         // got a fragments texture, find a place in it if we can
 825                         for (best = image->width, i = 0;i < image->width - w;i++)
 826                         {
 827                                 for (best2 = 0, j = 0;j < w;j++)
 828                                 {
 829                                         if (image->blockallocation[i+j] >= best)
 830                                                 break;
 831                                         if (best2 < image->blockallocation[i+j])
 832                                                 best2 = image->blockallocation[i+j];
 833                                 }
 834                                 if (j == w)
 835                                 {
 836                                         // this is a valid spot
 837                                         x = i;
 838                                         y = best = best2;
 839                                 }
 840                         }
 841
 842                         if (best + h > image->height)
 843                                 continue;
 844
 845                         for (i = 0;i < w;i++)
 846                                 image->blockallocation[x + i] = best + h;
 847
 848                         glt->x = x;
 849                         glt->y = y;
 850                         glt->z = 0;
 851                         glt->image = image;
 852                         image->texturecount++;
 853                         return;
 854                 }
 855
 856                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 857                 if (image == NULL)
 858                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 859                 image->type = GLIMAGETYPE_FRAGMENTS;
 860                 // make sure the created image is big enough for the fragment
 861                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 862                 image->height = 1;
 863                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 864                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 865                 image->depth = 1;
 866                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 867                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 868                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
 869                 memset(image->blockallocation, 0, image->width * sizeof(short));
 870
 871                 x = 0;
 872                 y = 0;
 873                 z = 0;
 874                 for (i = 0;i < w;i++)
 875                         image->blockallocation[x + i] = y + h;
 876         }
 877         else
 878         {
 879                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 880
 881                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 882                 if (image == NULL)
 883                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 884                 image->type = GLIMAGETYPE_TILE;
 885                 image->blockallocation = NULL;
 886
 887                 // calculate final size
 888                 if (r_max_size.integer > realmaxsize)
 889                         Cvar_SetValue("r_max_size", realmaxsize);
 890                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 891                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 892                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
 893                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
 894                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
 895                 for (image->depth >>= r_picmip.integer;image->depth > r_max_size.integer;image->depth >>= 1);
 896                 if (image->width < 1) image->width = 1;
 897                 if (image->height < 1) image->height = 1;
 898                 if (image->depth < 1) image->depth = 1;
 899         }
 900         image->texturetype = glt->texturetype;
 901         image->glinternalformat = texinfo->glinternalformat;
 902         image->glformat = texinfo->glformat;
 903         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP)) | GLTEXF_UPLOAD;
 904         image->bytesperpixel = texinfo->internalbytesperpixel;
 905         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 906         // get a texture number to use
 907         qglGenTextures(1, &image->texnum);
 908         *imagechainpointer = image;
 909         image->texturecount++;
 910
 911         glt->x = x;
 912         glt->y = y;
 913         glt->y = z;
 914         glt->image = image;
 915 }
 916
 917 // note: R_FindImageForTexture must be called before this
 918 static void R_UploadTexture (gltexture_t *glt)
 919 {
 920         if (!(glt->flags & GLTEXF_UPLOAD))
 921                 return;
 922
 923         R_Upload(glt, glt->inputtexels);
 924         if (glt->inputtexels)
 925         {
 926                 Mem_Free(glt->inputtexels);
 927                 glt->inputtexels = NULL;
 928                 glt->flags |= GLTEXF_DESTROYED;
 929         }
 930         else if (glt->flags & GLTEXF_DESTROYED)
 931                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 932 }
 933
 934 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)
 935 {
 936         int i, size;
 937         gltexture_t *glt;
 938         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 939         textypeinfo_t *texinfo;
 940
 941         if (cls.state == ca_dedicated)
 942                 return NULL;
 943
 944         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
 945                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
 946         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 947                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
 948         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 949                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
 950
 951         /*
 952         glt = R_FindTexture (pool, identifier);
 953         if (glt)
 954         {
 955                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
 956                 R_FreeTexture((rtexture_t *)glt);
 957         }
 958         */
 959
 960         texinfo = R_GetTexTypeInfo(textype, flags);
 961         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 962         if (size < 1)
 963                 Sys_Error("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
 964
 965         // clear the alpha flag if the texture has no transparent pixels
 966         switch(textype)
 967         {
 968         case TEXTYPE_PALETTE:
 969                 if (flags & TEXF_ALPHA)
 970                 {
 971                         flags &= ~TEXF_ALPHA;
 972                         if (data)
 973                         {
 974                                 for (i = 0;i < size;i++)
 975                                 {
 976                                         if (((qbyte *)&palette[data[i]])[3] == 255)
 977                                         {
 978                                                 flags |= TEXF_ALPHA;
 979                                                 break;
 980                                         }
 981                                 }
 982                         }
 983                 }
 984                 break;
 985         case TEXTYPE_RGB:
 986                 if (flags & TEXF_ALPHA)
 987                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
 988                 break;
 989         case TEXTYPE_RGBA:
 990                 if (flags & TEXF_ALPHA)
 991                 {
 992                         flags &= ~TEXF_ALPHA;
 993                         if (data)
 994                         {
 995                                 for (i = 3;i < size;i += 4)
 996                                 {
 997                                         if (data[i] < 255)
 998                                         {
 999                                                 flags |= TEXF_ALPHA;
1000                                                 break;
1001                                         }
1002                                 }
1003                         }
1004                 }
1005                 break;
1006         default:
1007                 Host_Error("R_LoadTexture: unknown texture type\n");
1008         }
1009
1010         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1011         if (identifier)
1012         {
1013                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1014                 strcpy (glt->identifier, identifier);
1015         }
1016         else
1017                 glt->identifier = NULL;
1018         glt->pool = pool;
1019         glt->chain = pool->gltchain;
1020         pool->gltchain = glt;
1021         glt->width = width;
1022         glt->height = height;
1023         glt->depth = depth;
1024         glt->flags = flags | GLTEXF_UPLOAD;
1025         glt->textype = texinfo;
1026         glt->texturetype = texturetype;
1027         glt->inputdatasize = size;
1028         glt->palette = palette;
1029
1030         if (data)
1031         {
1032                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1033                 if (glt->inputtexels == NULL)
1034                         Sys_Error("R_LoadTexture: out of memory\n");
1035                 memcpy(glt->inputtexels, data, size);
1036         }
1037         else
1038                 glt->inputtexels = NULL;
1039
1040         R_FindImageForTexture(glt);
1041         R_PrecacheTexture(glt);
1042
1043         return (rtexture_t *)glt;
1044 }
1045
1046 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1047 {
1048         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1049 }
1050
1051 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)
1052 {
1053         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1054 }
1055
1056 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)
1057 {
1058         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1059 }
1060
1061 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1062 {
1063         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1064 }
1065
1066 int R_TextureHasAlpha(rtexture_t *rt)
1067 {
1068         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1069 }
1070
1071 int R_TextureWidth(rtexture_t *rt)
1072 {
1073         return rt ? ((gltexture_t *)rt)->width : 0;
1074 }
1075
1076 int R_TextureHeight(rtexture_t *rt)
1077 {
1078         return rt ? ((gltexture_t *)rt)->height : 0;
1079 }
1080
1081 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1082 {
1083         gltexture_t *glt;
1084         float iwidth, iheight, idepth;
1085         if (cls.state == ca_dedicated)
1086         {
1087                 if (x)
1088                         *x = 0;
1089                 if (y)
1090                         *y = 0;
1091                 if (z)
1092                         *z = 0;
1093                 if (fx1 || fy1 || fx2 || fy2)
1094                 {
1095                         if (fx1)
1096                                 *fx1 = 0;
1097                         if (fy1)
1098                                 *fy1 = 0;
1099                         if (fz1)
1100                                 *fz1 = 0;
1101                         if (fx2)
1102                                 *fx2 = 1;
1103                         if (fy2)
1104                                 *fy2 = 1;
1105                         if (fz2)
1106                                 *fz2 = 1;
1107                 }
1108                 return;
1109         }
1110         if (!rt)
1111                 Host_Error("R_FragmentLocation: no texture supplied\n");
1112         glt = (gltexture_t *)rt;
1113         if (glt->flags & TEXF_FRAGMENT)
1114         {
1115                 if (x)
1116                         *x = glt->x;
1117                 if (y)
1118                         *y = glt->y;
1119                 if (fx1 || fy1 || fx2 || fy2)
1120                 {
1121                         iwidth = 1.0f / glt->image->width;
1122                         iheight = 1.0f / glt->image->height;
1123                         idepth = 1.0f / glt->image->depth;
1124                         if (fx1)
1125                                 *fx1 = glt->x * iwidth;
1126                         if (fy1)
1127                                 *fy1 = glt->y * iheight;
1128                         if (fz1)
1129                                 *fz1 = glt->z * idepth;
1130                         if (fx2)
1131                                 *fx2 = (glt->x + glt->width) * iwidth;
1132                         if (fy2)
1133                                 *fy2 = (glt->y + glt->height) * iheight;
1134                         if (fz2)
1135                                 *fz2 = (glt->z + glt->depth) * idepth;
1136                 }
1137         }
1138         else
1139         {
1140                 if (x)
1141                         *x = 0;
1142                 if (y)
1143                         *y = 0;
1144                 if (z)
1145                         *z = 0;
1146                 if (fx1 || fy1 || fx2 || fy2)
1147                 {
1148                         if (fx1)
1149                                 *fx1 = 0;
1150                         if (fy1)
1151                                 *fy1 = 0;
1152                         if (fz1)
1153                                 *fz1 = 0;
1154                         if (fx2)
1155                                 *fx2 = 1;
1156                         if (fy2)
1157                                 *fy2 = 1;
1158                         if (fz2)
1159                                 *fz2 = 1;
1160                 }
1161         }
1162 }
1163
1164 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1165 {
1166         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1167 }
1168
1169 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1170 {
1171         return width;
1172 }
1173
1174 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1175 {
1176         gltexture_t *glt;
1177         if (rt == NULL)
1178                 Host_Error("R_UpdateTexture: no texture supplied\n");
1179         if (data == NULL)
1180                 Host_Error("R_UpdateTexture: no data supplied\n");
1181         glt = (gltexture_t *)rt;
1182
1183         // if it has not been uploaded yet, update the data that will be used when it is
1184         if (glt->inputtexels)
1185                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1186         else
1187                 R_Upload(glt, data);
1188 }
1189