gl_textures.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5
   6 cvar_t  gl_max_size = {CVAR_SAVE, "gl_max_size", "2048"};
   7 cvar_t  gl_max_scrapsize = {CVAR_SAVE, "gl_max_scrapsize", "256"};
   8 cvar_t  gl_picmip = {CVAR_SAVE, "gl_picmip", "0"};
   9 cvar_t  r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
  10 cvar_t  r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
  11 cvar_t  gl_texture_anisotropy = {CVAR_SAVE, "gl_texture_anisotropy", "1"};
  12
  13 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  14 int             gl_filter_mag = GL_LINEAR;
  15
  16
  17 static mempool_t *texturemempool;
  18 static mempool_t *texturedatamempool;
  19 static mempool_t *textureprocessingmempool;
  20
  21 // note: this must not conflict with TEXF_ flags in r_textures.h
  22 // cleared when a texture is uploaded
  23 #define GLTEXF_UPLOAD 0x00010000
  24 // bitmask for mismatch checking
  25 #define GLTEXF_IMPORTANTBITS (0)
  26 // set when image is uploaded and freed
  27 #define GLTEXF_DESTROYED 0x00040000
  28
  29 // size of images which hold fragment textures, ignores picmip and max_size
  30 static int block_size;
  31
  32 typedef struct
  33 {
  34         int textype;
  35         int inputbytesperpixel;
  36         int internalbytesperpixel;
  37         int glformat;
  38         int glinternalformat;
  39 }
  40 textypeinfo_t;
  41
  42 static textypeinfo_t textype_palette       = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 3};
  43 static textypeinfo_t textype_rgb           = {TEXTYPE_RGB    , 3, 3, GL_RGB    , 3};
  44 static textypeinfo_t textype_rgba          = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 3};
  45 static textypeinfo_t textype_palette_alpha = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 4};
  46 static textypeinfo_t textype_rgba_alpha    = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 4};
  47 static textypeinfo_t textype_dsdt          = {TEXTYPE_DSDT   , 2, 2, GL_DSDT_NV, GL_DSDT8_NV};
  48
  49 // a tiling texture (most common type)
  50 #define GLIMAGETYPE_TILE 0
  51 // a fragments texture (contains one or more fragment textures)
  52 #define GLIMAGETYPE_FRAGMENTS 1
  53
  54 #define GLTEXTURETYPE_1D 0
  55 #define GLTEXTURETYPE_2D 1
  56 #define GLTEXTURETYPE_3D 2
  57 #define GLTEXTURETYPE_CUBEMAP 3
  58
  59 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  60 static int gltexturetypebindingenums[4] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB};
  61 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  62 static int cubemapside[6] =
  63 {
  64         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  65         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  66         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  67         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  68         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  69         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  70 };
  71
  72 // a gltextureimage can have one (or more if fragments) gltextures inside
  73 typedef struct gltextureimage_s
  74 {
  75         struct gltextureimage_s *imagechain;
  76         int texturecount;
  77         int type; // one of the GLIMAGETYPE_ values
  78         int texturetype; // one of the GLTEXTURETYPE_ values
  79         int sides; // 1 or 6 depending on texturetype
  80         int texnum; // GL texture slot number
  81         int width, height, depth; // 3D texture support
  82         int bytesperpixel; // bytes per pixel
  83         int glformat; // GL_RGB or GL_RGBA
  84         int glinternalformat; // 3 or 4
  85         int flags;
  86         short *blockallocation; // fragment allocation (2D only)
  87 }
  88 gltextureimage_t;
  89
  90 typedef struct gltexture_s
  91 {
  92         // this field is exposed to the R_GetTexture macro, for speed reasons
  93         // (must be identical in rtexture_t)
  94         int texnum; // GL texture slot number
  95
  96         // pointer to texturepool (check this to see if the texture is allocated)
  97         struct gltexturepool_s *pool;
  98         // pointer to next texture in texturepool chain
  99         struct gltexture_s *chain;
 100         // pointer into gltextureimage array
 101         gltextureimage_t *image;
 102         // name of the texture (this might be removed someday), no duplicates
 103         char *identifier;
 104         // location in the image, and size
 105         int x, y, z, width, height, depth;
 106         // copy of the original texture(s) supplied to the upload function, for
 107         // delayed uploads (non-precached)
 108         qbyte *inputtexels;
 109         // original data size in *inputtexels
 110         int inputdatasize;
 111         // flags supplied to the LoadTexture function
 112         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 113         int flags;
 114         // pointer to one of the textype_ structs
 115         textypeinfo_t *textype;
 116         // one of the GLTEXTURETYPE_ values
 117         int texturetype;
 118         // palette if the texture is TEXTYPE_PALETTE
 119         const unsigned int *palette;
 120 }
 121 gltexture_t;
 122
 123 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 124
 125 typedef struct gltexturepool_s
 126 {
 127         unsigned int sentinel;
 128         struct gltextureimage_s *imagechain;
 129         struct gltexture_s *gltchain;
 130         struct gltexturepool_s *next;
 131 }
 132 gltexturepool_t;
 133
 134 static gltexturepool_t *gltexturepoolchain = NULL;
 135
 136 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
 137 static int resizebuffersize = 0;
 138 static qbyte *texturebuffer;
 139 static int texturebuffersize = 0;
 140
 141 static int realmaxsize = 0;
 142
 143 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 144 {
 145         if (flags & TEXF_ALPHA)
 146         {
 147                 switch(textype)
 148                 {
 149                 case TEXTYPE_PALETTE:
 150                         return &textype_palette_alpha;
 151                 case TEXTYPE_RGB:
 152                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
 153                         return NULL;
 154                 case TEXTYPE_RGBA:
 155                         return &textype_rgba_alpha;
 156                 default:
 157                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 158                         return NULL;
 159                 }
 160         }
 161         else
 162         {
 163                 switch(textype)
 164                 {
 165                 case TEXTYPE_PALETTE:
 166                         return &textype_palette;
 167                 case TEXTYPE_RGB:
 168                         return &textype_rgb;
 169                 case TEXTYPE_RGBA:
 170                         return &textype_rgba;
 171                 case TEXTYPE_DSDT:
 172                         return &textype_dsdt;
 173                 default:
 174                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 175                         return NULL;
 176                 }
 177         }
 178 }
 179
 180 static void R_UploadTexture(gltexture_t *t);
 181
 182 static void R_PrecacheTexture(gltexture_t *glt)
 183 {
 184         int precache;
 185         precache = false;
 186         if (glt->flags & TEXF_ALWAYSPRECACHE)
 187                 precache = true;
 188         else if (r_precachetextures.integer >= 2)
 189                 precache = true;
 190         else if (r_precachetextures.integer >= 1)
 191                 if (glt->flags & TEXF_PRECACHE)
 192                         precache = true;
 193
 194         if (precache)
 195                 R_UploadTexture(glt);
 196 }
 197
 198 int R_RealGetTexture(rtexture_t *rt)
 199 {
 200         if (rt)
 201         {
 202                 gltexture_t *glt;
 203                 glt = (gltexture_t *)rt;
 204                 if (glt->flags & GLTEXF_UPLOAD)
 205                         R_UploadTexture(glt);
 206                 glt->texnum = glt->image->texnum;
 207                 return glt->image->texnum;
 208         }
 209         else
 210                 return 0;
 211 }
 212
 213 void R_FreeTexture(rtexture_t *rt)
 214 {
 215         gltexture_t *glt, **gltpointer;
 216         gltextureimage_t *image, **gltimagepointer;
 217
 218         glt = (gltexture_t *)rt;
 219         if (glt == NULL)
 220                 Host_Error("R_FreeTexture: texture == NULL\n");
 221
 222         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 223         if (*gltpointer == glt)
 224                 *gltpointer = glt->chain;
 225         else
 226                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
 227
 228         // note: if freeing a fragment texture, this will not make the claimed
 229         // space available for new textures unless all other fragments in the
 230         // image are also freed
 231         if (glt->image)
 232         {
 233                 image = glt->image;
 234                 image->texturecount--;
 235                 if (image->texturecount < 1)
 236                 {
 237                         for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 238                         if (*gltimagepointer == image)
 239                                 *gltimagepointer = image->imagechain;
 240                         else
 241                                 Host_Error("R_FreeTexture: image not linked in pool\n");
 242                         if (image->texnum)
 243                                 qglDeleteTextures(1, &image->texnum);
 244                         if (image->blockallocation)
 245                                 Mem_Free(image->blockallocation);
 246                         Mem_Free(image);
 247                 }
 248         }
 249
 250         if (glt->identifier)
 251                 Mem_Free(glt->identifier);
 252         if (glt->inputtexels)
 253                 Mem_Free(glt->inputtexels);
 254         Mem_Free(glt);
 255 }
 256
 257 /*
 258 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 259 {
 260         gltexture_t     *glt;
 261
 262         if (!identifier)
 263                 return NULL;
 264
 265         for (glt = pool->gltchain;glt;glt = glt->chain)
 266                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 267                         return glt;
 268
 269         return NULL;
 270 }
 271 */
 272
 273 rtexturepool_t *R_AllocTexturePool(void)
 274 {
 275         gltexturepool_t *pool;
 276         if (texturemempool == NULL)
 277                 return NULL;
 278         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 279         if (pool == NULL)
 280                 return NULL;
 281         pool->next = gltexturepoolchain;
 282         gltexturepoolchain = pool;
 283         pool->sentinel = TEXTUREPOOL_SENTINEL;
 284         return (rtexturepool_t *)pool;
 285 }
 286
 287 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 288 {
 289         gltexturepool_t *pool, **poolpointer;
 290         if (rtexturepool == NULL)
 291                 return;
 292         if (*rtexturepool == NULL)
 293                 return;
 294         pool = (gltexturepool_t *)(*rtexturepool);
 295         *rtexturepool = NULL;
 296         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 297                 Host_Error("R_FreeTexturePool: pool already freed\n");
 298         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 299         if (*poolpointer == pool)
 300                 *poolpointer = pool->next;
 301         else
 302                 Host_Error("R_FreeTexturePool: pool not linked\n");
 303         while (pool->gltchain)
 304                 R_FreeTexture((rtexture_t *)pool->gltchain);
 305         if (pool->imagechain)
 306                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 307         Mem_Free(pool);
 308 }
 309
 310
 311 typedef struct
 312 {
 313         char *name;
 314         int minification, magnification;
 315 }
 316 glmode_t;
 317
 318 static glmode_t modes[] =
 319 {
 320         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 321         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 322         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 323         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 324         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 325         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 326 };
 327
 328 static void GL_TextureMode_f (void)
 329 {
 330         int i;
 331         GLint oldbindtexnum;
 332         gltextureimage_t *image;
 333         gltexturepool_t *pool;
 334
 335         if (Cmd_Argc() == 1)
 336         {
 337                 for (i = 0;i < 6;i++)
 338                 {
 339                         if (gl_filter_min == modes[i].minification)
 340                         {
 341                                 Con_Printf("%s\n", modes[i].name);
 342                                 return;
 343                         }
 344                 }
 345                 Con_Print("current filter is unknown???\n");
 346                 return;
 347         }
 348
 349         for (i = 0;i < 6;i++)
 350                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 351                         break;
 352         if (i == 6)
 353         {
 354                 Con_Print("bad filter name\n");
 355                 return;
 356         }
 357
 358         gl_filter_min = modes[i].minification;
 359         gl_filter_mag = modes[i].magnification;
 360
 361         // change all the existing mipmap texture objects
 362         // FIXME: force renderer(/client/something?) restart instead?
 363         for (pool = gltexturepoolchain;pool;pool = pool->next)
 364         {
 365                 for (image = pool->imagechain;image;image = image->imagechain)
 366                 {
 367                         // only update already uploaded images
 368                         if (!(image->flags & GLTEXF_UPLOAD) && !(image->flags & (TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 369                         {
 370                                 qglGetIntegerv(gltexturetypebindingenums[image->texturetype], &oldbindtexnum);
 371                                 qglBindTexture(gltexturetypeenums[image->texturetype], image->texnum);
 372                                 if (image->flags & TEXF_MIPMAP)
 373                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);
 374                                 else
 375                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 376                                 qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 377                                 qglBindTexture(gltexturetypeenums[image->texturetype], oldbindtexnum);
 378                         }
 379                 }
 380         }
 381 }
 382
 383 static int R_CalcTexelDataSize (gltexture_t *glt)
 384 {
 385         int width2, height2, depth2, size, picmip;
 386         if (glt->flags & TEXF_FRAGMENT)
 387                 size = glt->width * glt->height * glt->depth;
 388         else
 389         {
 390                 picmip = 0;
 391                 if (glt->flags & TEXF_PICMIP)
 392                         picmip = gl_picmip.integer;
 393                 if (gl_max_size.integer > realmaxsize)
 394                         Cvar_SetValue("gl_max_size", realmaxsize);
 395                 // calculate final size
 396                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 397                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 398                 for (depth2 = 1;depth2 < glt->depth;depth2 <<= 1);
 399                 for (width2 >>= picmip;width2 > gl_max_size.integer;width2 >>= 1);
 400                 for (height2 >>= picmip;height2 > gl_max_size.integer;height2 >>= 1);
 401                 for (depth2 >>= picmip;depth2 > gl_max_size.integer;depth2 >>= 1);
 402                 if (width2 < 1) width2 = 1;
 403                 if (height2 < 1) height2 = 1;
 404                 if (depth2 < 1) depth2 = 1;
 405
 406                 size = 0;
 407                 if (glt->flags & TEXF_MIPMAP)
 408                 {
 409                         while (width2 > 1 || height2 > 1 || depth2 > 1)
 410                         {
 411                                 size += width2 * height2 * depth2;
 412                                 if (width2 > 1)
 413                                         width2 >>= 1;
 414                                 if (height2 > 1)
 415                                         height2 >>= 1;
 416                                 if (depth2 > 1)
 417                                         depth2 >>= 1;
 418                         }
 419                         size++; // count the last 1x1 mipmap
 420                 }
 421                 else
 422                         size = width2 * height2 * depth2;
 423         }
 424         size *= glt->textype->internalbytesperpixel * glt->image->sides;
 425
 426         return size;
 427 }
 428
 429 void R_TextureStats_PrintTotal(void)
 430 {
 431         int glsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 432         gltexture_t *glt;
 433         gltexturepool_t *pool;
 434         for (pool = gltexturepoolchain;pool;pool = pool->next)
 435         {
 436                 for (glt = pool->gltchain;glt;glt = glt->chain)
 437                 {
 438                         glsize = R_CalcTexelDataSize(glt);
 439                         total++;
 440                         totalt += glsize;
 441                         totalp += glt->inputdatasize;
 442                         if (!(glt->flags & GLTEXF_UPLOAD))
 443                         {
 444                                 loaded++;
 445                                 loadedt += glsize;
 446                                 loadedp += glt->inputdatasize;
 447                         }
 448                 }
 449         }
 450         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);
 451 }
 452
 453 static void R_TextureStats_f(void)
 454 {
 455         int loaded;
 456         gltexture_t *glt;
 457         gltexturepool_t *pool;
 458         Con_Print("glsize input loaded mip alpha name\n");
 459         for (pool = gltexturepoolchain;pool;pool = pool->next)
 460         {
 461                 for (glt = pool->gltchain;glt;glt = glt->chain)
 462                 {
 463                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 464                         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>");
 465                 }
 466                 Con_Printf("pool %10p\n", pool);
 467         }
 468         R_TextureStats_PrintTotal();
 469 }
 470
 471 char engineversion[40];
 472
 473 static void r_textures_start(void)
 474 {
 475         // deal with size limits of various drivers (3dfx in particular)
 476         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 477         CHECKGLERROR
 478         // LordHavoc: allow any alignment
 479         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 480         CHECKGLERROR
 481
 482         // use the largest scrap texture size we can (not sure if this is really a good idea)
 483         for (block_size = 1;block_size < realmaxsize && block_size < gl_max_scrapsize.integer;block_size <<= 1);
 484
 485         texturemempool = Mem_AllocPool("Texture Info", 0, NULL);
 486         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)", 0, NULL);
 487         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers", 0, NULL);
 488
 489         // Disable JPEG screenshots if the DLL isn't loaded
 490         if (! JPEG_OpenLibrary ())
 491                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 492 }
 493
 494 static void r_textures_shutdown(void)
 495 {
 496         rtexturepool_t *temp;
 497
 498         JPEG_CloseLibrary ();
 499
 500         while(gltexturepoolchain)
 501         {
 502                 temp = (rtexturepool_t *) gltexturepoolchain;
 503                 R_FreeTexturePool(&temp);
 504         }
 505
 506         resizebuffersize = 0;
 507         texturebuffersize = 0;
 508         resizebuffer = NULL;
 509         colorconvertbuffer = NULL;
 510         texturebuffer = NULL;
 511         Mem_FreePool(&texturemempool);
 512         Mem_FreePool(&texturedatamempool);
 513         Mem_FreePool(&textureprocessingmempool);
 514 }
 515
 516 static void r_textures_newmap(void)
 517 {
 518 }
 519
 520 void R_Textures_Init (void)
 521 {
 522         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
 523         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 524         Cvar_RegisterVariable (&gl_max_scrapsize);
 525         Cvar_RegisterVariable (&gl_max_size);
 526         Cvar_RegisterVariable (&gl_picmip);
 527         Cvar_RegisterVariable (&r_lerpimages);
 528         Cvar_RegisterVariable (&r_precachetextures);
 529         Cvar_RegisterVariable (&gl_texture_anisotropy);
 530
 531         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 532 }
 533
 534 void R_Textures_Frame (void)
 535 {
 536         static int old_aniso = 0;
 537
 538         // could do procedural texture animation here, if we keep track of which
 539         // textures were accessed this frame...
 540
 541         // free the resize buffers
 542         resizebuffersize = 0;
 543         if (resizebuffer)
 544         {
 545                 Mem_Free(resizebuffer);
 546                 resizebuffer = NULL;
 547         }
 548         if (colorconvertbuffer)
 549         {
 550                 Mem_Free(colorconvertbuffer);
 551                 colorconvertbuffer = NULL;
 552         }
 553
 554         if (old_aniso != gl_texture_anisotropy.integer)
 555         {
 556                 gltextureimage_t *image;
 557                 gltexturepool_t *pool;
 558                 GLint oldbindtexnum;
 559
 560                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 561
 562                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 563
 564                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 565                 {
 566                         for (image = pool->imagechain;image;image = image->imagechain)
 567                         {
 568                                 // only update already uploaded images
 569                                 if (!(image->flags & GLTEXF_UPLOAD))
 570                                 {
 571                                         qglGetIntegerv(gltexturetypebindingenums[image->texturetype], &oldbindtexnum);
 572
 573                                         qglBindTexture(gltexturetypeenums[image->texturetype], image->texnum);
 574                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 575
 576                                         qglBindTexture(gltexturetypeenums[image->texturetype], oldbindtexnum);
 577                                 }
 578                         }
 579                 }
 580         }
 581 }
 582
 583 void R_MakeResizeBufferBigger(int size)
 584 {
 585         if (resizebuffersize < size)
 586         {
 587                 resizebuffersize = size;
 588                 if (resizebuffer)
 589                         Mem_Free(resizebuffer);
 590                 if (colorconvertbuffer)
 591                         Mem_Free(colorconvertbuffer);
 592                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 593                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 594                 if (!resizebuffer || !colorconvertbuffer)
 595                         Host_Error("R_Upload: out of memory\n");
 596         }
 597 }
 598
 599 static void GL_SetupTextureParameters(int flags, int texturetype)
 600 {
 601         int textureenum = gltexturetypeenums[texturetype];
 602         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 603
 604         CHECKGLERROR
 605
 606         if (gl_support_anisotropy)
 607         {
 608                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 609                 if (gl_texture_anisotropy.integer != aniso)
 610                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 611                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 612         }
 613         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 614         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 615         if (gltexturetypedimensions[texturetype] >= 3)
 616         {
 617                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 618         }
 619
 620         CHECKGLERROR
 621         if (flags & TEXF_FORCENEAREST)
 622         {
 623                 if (flags & TEXF_MIPMAP)
 624                 {
 625                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 626                 }
 627                 else
 628                 {
 629                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 630                 }
 631                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 632         }
 633         else if (flags & TEXF_FORCELINEAR)
 634         {
 635                 if (flags & TEXF_MIPMAP)
 636                 {
 637                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 638                         {
 639                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 640                         }
 641                         else
 642                         {
 643                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 644                         }
 645                 }
 646                 else
 647                 {
 648                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 649                 }
 650                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 651         }
 652         else
 653         {
 654                 if (flags & TEXF_MIPMAP)
 655                 {
 656                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 657                 }
 658                 else
 659                 {
 660                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 661                 }
 662                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 663         }
 664
 665         CHECKGLERROR
 666 }
 667
 668 static void R_Upload(gltexture_t *glt, qbyte *data)
 669 {
 670         int i, mip, width, height, depth;
 671         GLint oldbindtexnum;
 672         qbyte *prevbuffer;
 673         prevbuffer = data;
 674
 675         CHECKGLERROR
 676
 677         glt->texnum = glt->image->texnum;
 678         // we need to restore the texture binding after finishing the upload
 679         qglGetIntegerv(gltexturetypebindingenums[glt->image->texturetype], &oldbindtexnum);
 680         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 681         CHECKGLERROR
 682         glt->flags &= ~GLTEXF_UPLOAD;
 683
 684         if (glt->flags & TEXF_FRAGMENT)
 685         {
 686                 if (glt->image->flags & GLTEXF_UPLOAD)
 687                 {
 688                         glt->image->flags &= ~GLTEXF_UPLOAD;
 689                         Con_DPrint("uploaded new fragments image\n");
 690                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 691                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 692                         switch(glt->image->texturetype)
 693                         {
 694                         case GLTEXTURETYPE_1D:
 695                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 696                                 CHECKGLERROR
 697                                 break;
 698                         case GLTEXTURETYPE_2D:
 699                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 700                                 CHECKGLERROR
 701                                 break;
 702                         case GLTEXTURETYPE_3D:
 703                                 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);
 704                                 CHECKGLERROR
 705                                 break;
 706                         default:
 707                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 708                                 break;
 709                         }
 710                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 711                 }
 712
 713                 if (prevbuffer == NULL)
 714                 {
 715                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 716                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 717                         prevbuffer = resizebuffer;
 718                 }
 719                 else if (glt->textype->textype == TEXTYPE_PALETTE)
 720                 {
 721                         // promote paletted to RGBA, so we only have to worry about RGB and
 722                         // RGBA in the rest of this code
 723                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
 724                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
 725                         prevbuffer = colorconvertbuffer;
 726                 }
 727
 728                 switch(glt->image->texturetype)
 729                 {
 730                 case GLTEXTURETYPE_1D:
 731                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 732                         CHECKGLERROR
 733                         break;
 734                 case GLTEXTURETYPE_2D:
 735                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 736                         CHECKGLERROR
 737                         break;
 738                 case GLTEXTURETYPE_3D:
 739                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 740                         CHECKGLERROR
 741                         break;
 742                 default:
 743                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 744                         break;
 745                 }
 746         }
 747         else
 748         {
 749                 glt->image->flags &= ~GLTEXF_UPLOAD;
 750
 751                 // these are rounded up versions of the size to do better resampling
 752                 for (width  = 1;width  < glt->width ;width  <<= 1);
 753                 for (height = 1;height < glt->height;height <<= 1);
 754                 for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 755
 756                 R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
 757
 758                 if (prevbuffer == NULL)
 759                 {
 760                         width = glt->image->width;
 761                         height = glt->image->height;
 762                         depth = glt->image->depth;
 763                         memset(resizebuffer, 255, width * height * depth * glt->image->bytesperpixel);
 764                         prevbuffer = resizebuffer;
 765                 }
 766                 else
 767                 {
 768                         if (glt->textype->textype == TEXTYPE_PALETTE)
 769                         {
 770                                 // promote paletted to RGBA, so we only have to worry about RGB and
 771                                 // RGBA in the rest of this code
 772                                 Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
 773                                 prevbuffer = colorconvertbuffer;
 774                         }
 775                 }
 776
 777                 // cubemaps contain multiple images and thus get processed a bit differently
 778                 if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
 779                 {
 780                         if (glt->width != width || glt->height != height || glt->depth != depth)
 781                         {
 782                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 783                                 prevbuffer = resizebuffer;
 784                         }
 785                         // picmip/max_size
 786                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 787                         {
 788                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 789                                 prevbuffer = resizebuffer;
 790                         }
 791                 }
 792                 mip = 0;
 793                 switch(glt->image->texturetype)
 794                 {
 795                 case GLTEXTURETYPE_1D:
 796                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 797                         CHECKGLERROR
 798                         if (glt->flags & TEXF_MIPMAP)
 799                         {
 800                                 while (width > 1 || height > 1 || depth > 1)
 801                                 {
 802                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 803                                         prevbuffer = resizebuffer;
 804                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 805                                         CHECKGLERROR
 806                                 }
 807                         }
 808                         break;
 809                 case GLTEXTURETYPE_2D:
 810                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 811                         CHECKGLERROR
 812                         if (glt->flags & TEXF_MIPMAP)
 813                         {
 814                                 while (width > 1 || height > 1 || depth > 1)
 815                                 {
 816                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 817                                         prevbuffer = resizebuffer;
 818                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 819                                         CHECKGLERROR
 820                                 }
 821                         }
 822                         break;
 823                 case GLTEXTURETYPE_3D:
 824                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 825                         CHECKGLERROR
 826                         if (glt->flags & TEXF_MIPMAP)
 827                         {
 828                                 while (width > 1 || height > 1 || depth > 1)
 829                                 {
 830                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 831                                         prevbuffer = resizebuffer;
 832                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 833                                         CHECKGLERROR
 834                                 }
 835                         }
 836                         break;
 837                 case GLTEXTURETYPE_CUBEMAP:
 838                         // convert and upload each side in turn,
 839                         // from a continuous block of input texels
 840                         texturebuffer = prevbuffer;
 841                         for (i = 0;i < 6;i++)
 842                         {
 843                                 prevbuffer = texturebuffer;
 844                                 texturebuffer += glt->width * glt->height * glt->depth * glt->textype->inputbytesperpixel;
 845                                 if (glt->width != width || glt->height != height || glt->depth != depth)
 846                                 {
 847                                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 848                                         prevbuffer = resizebuffer;
 849                                 }
 850                                 // picmip/max_size
 851                                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 852                                 {
 853                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 854                                         prevbuffer = resizebuffer;
 855                                 }
 856                                 mip = 0;
 857                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 858                                 CHECKGLERROR
 859                                 if (glt->flags & TEXF_MIPMAP)
 860                                 {
 861                                         while (width > 1 || height > 1 || depth > 1)
 862                                         {
 863                                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 864                                                 prevbuffer = resizebuffer;
 865                                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 866                                                 CHECKGLERROR
 867                                         }
 868                                 }
 869                         }
 870                         break;
 871                 }
 872                 GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 873         }
 874         qglBindTexture(gltexturetypeenums[glt->image->texturetype], oldbindtexnum);
 875 }
 876
 877 static void R_FindImageForTexture(gltexture_t *glt)
 878 {
 879         int i, j, best, best2, x, y, z, w, h, d, picmip;
 880         textypeinfo_t *texinfo;
 881         gltexturepool_t *pool;
 882         gltextureimage_t *image, **imagechainpointer;
 883         texinfo = glt->textype;
 884         pool = glt->pool;
 885
 886         // remains -1 until uploaded
 887         glt->texnum = -1;
 888
 889         x = 0;
 890         y = 0;
 891         z = 0;
 892         w = glt->width;
 893         h = glt->height;
 894         d = glt->depth;
 895         if (glt->flags & TEXF_FRAGMENT)
 896         {
 897                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 898                 {
 899                         image = *imagechainpointer;
 900                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 901                                 continue;
 902                         if (image->texturetype != glt->texturetype)
 903                                 continue;
 904                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
 905                                 continue;
 906                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 907                                 continue;
 908                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 909                                 continue;
 910
 911                         // got a fragments texture, find a place in it if we can
 912                         for (best = image->width, i = 0;i < image->width - w;i++)
 913                         {
 914                                 for (best2 = 0, j = 0;j < w;j++)
 915                                 {
 916                                         if (image->blockallocation[i+j] >= best)
 917                                                 break;
 918                                         if (best2 < image->blockallocation[i+j])
 919                                                 best2 = image->blockallocation[i+j];
 920                                 }
 921                                 if (j == w)
 922                                 {
 923                                         // this is a valid spot
 924                                         x = i;
 925                                         y = best = best2;
 926                                 }
 927                         }
 928
 929                         if (best + h > image->height)
 930                                 continue;
 931
 932                         for (i = 0;i < w;i++)
 933                                 image->blockallocation[x + i] = best + h;
 934
 935                         glt->x = x;
 936                         glt->y = y;
 937                         glt->z = 0;
 938                         glt->image = image;
 939                         image->texturecount++;
 940                         return;
 941                 }
 942
 943                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 944                 if (image == NULL)
 945                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 946                 image->type = GLIMAGETYPE_FRAGMENTS;
 947                 // make sure the created image is big enough for the fragment
 948                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 949                 image->height = 1;
 950                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 951                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 952                 image->depth = 1;
 953                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 954                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 955                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
 956                 memset(image->blockallocation, 0, image->width * sizeof(short));
 957
 958                 x = 0;
 959                 y = 0;
 960                 z = 0;
 961                 for (i = 0;i < w;i++)
 962                         image->blockallocation[x + i] = y + h;
 963         }
 964         else
 965         {
 966                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 967
 968                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 969                 if (image == NULL)
 970                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 971                 image->type = GLIMAGETYPE_TILE;
 972                 image->blockallocation = NULL;
 973
 974                 picmip = 0;
 975                 if (glt->flags & TEXF_PICMIP)
 976                         picmip = gl_picmip.integer;
 977                 // calculate final size
 978                 if (gl_max_size.integer > realmaxsize)
 979                         Cvar_SetValue("gl_max_size", realmaxsize);
 980                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 981                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 982                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
 983                 for (image->width >>= picmip;image->width > gl_max_size.integer;image->width >>= 1);
 984                 for (image->height >>= picmip;image->height > gl_max_size.integer;image->height >>= 1);
 985                 for (image->depth >>= picmip;image->depth > gl_max_size.integer;image->depth >>= 1);
 986                 if (image->width < 1) image->width = 1;
 987                 if (image->height < 1) image->height = 1;
 988                 if (image->depth < 1) image->depth = 1;
 989         }
 990         image->texturetype = glt->texturetype;
 991         image->glinternalformat = texinfo->glinternalformat;
 992         image->glformat = texinfo->glformat;
 993         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP | TEXF_PICMIP)) | GLTEXF_UPLOAD;
 994         image->bytesperpixel = texinfo->internalbytesperpixel;
 995         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 996         // get a texture number to use
 997         qglGenTextures(1, &image->texnum);
 998         *imagechainpointer = image;
 999         image->texturecount++;
1000
1001         glt->x = x;
1002         glt->y = y;
1003         glt->y = z;
1004         glt->image = image;
1005 }
1006
1007 // note: R_FindImageForTexture must be called before this
1008 static void R_UploadTexture (gltexture_t *glt)
1009 {
1010         if (!(glt->flags & GLTEXF_UPLOAD))
1011                 return;
1012
1013         R_Upload(glt, glt->inputtexels);
1014         if (glt->inputtexels)
1015         {
1016                 Mem_Free(glt->inputtexels);
1017                 glt->inputtexels = NULL;
1018                 glt->flags |= GLTEXF_DESTROYED;
1019         }
1020         else if (glt->flags & GLTEXF_DESTROYED)
1021                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
1022 }
1023
1024 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)
1025 {
1026         int i, size;
1027         gltexture_t *glt;
1028         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1029         textypeinfo_t *texinfo;
1030
1031         if (cls.state == ca_dedicated)
1032                 return NULL;
1033
1034         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
1035                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
1036         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
1037                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
1038         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
1039                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
1040
1041         /*
1042         glt = R_FindTexture (pool, identifier);
1043         if (glt)
1044         {
1045                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
1046                 R_FreeTexture((rtexture_t *)glt);
1047         }
1048         */
1049
1050         texinfo = R_GetTexTypeInfo(textype, flags);
1051         size = width * height * depth * sides * texinfo->inputbytesperpixel;
1052         if (size < 1)
1053                 Sys_Error("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
1054
1055         // clear the alpha flag if the texture has no transparent pixels
1056         switch(textype)
1057         {
1058         case TEXTYPE_PALETTE:
1059                 if (flags & TEXF_ALPHA)
1060                 {
1061                         flags &= ~TEXF_ALPHA;
1062                         if (data)
1063                         {
1064                                 for (i = 0;i < size;i++)
1065                                 {
1066                                         if (((qbyte *)&palette[data[i]])[3] < 255)
1067                                         {
1068                                                 flags |= TEXF_ALPHA;
1069                                                 break;
1070                                         }
1071                                 }
1072                         }
1073                 }
1074                 break;
1075         case TEXTYPE_RGB:
1076                 if (flags & TEXF_ALPHA)
1077                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
1078                 break;
1079         case TEXTYPE_RGBA:
1080                 if (flags & TEXF_ALPHA)
1081                 {
1082                         flags &= ~TEXF_ALPHA;
1083                         if (data)
1084                         {
1085                                 for (i = 3;i < size;i += 4)
1086                                 {
1087                                         if (data[i] < 255)
1088                                         {
1089                                                 flags |= TEXF_ALPHA;
1090                                                 break;
1091                                         }
1092                                 }
1093                         }
1094                 }
1095                 break;
1096         case TEXTYPE_DSDT:
1097                 break;
1098         default:
1099                 Host_Error("R_LoadTexture: unknown texture type\n");
1100         }
1101
1102         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1103         if (identifier)
1104         {
1105                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1106                 strcpy (glt->identifier, identifier);
1107         }
1108         else
1109                 glt->identifier = NULL;
1110         glt->pool = pool;
1111         glt->chain = pool->gltchain;
1112         pool->gltchain = glt;
1113         glt->width = width;
1114         glt->height = height;
1115         glt->depth = depth;
1116         glt->flags = flags | GLTEXF_UPLOAD;
1117         glt->textype = texinfo;
1118         glt->texturetype = texturetype;
1119         glt->inputdatasize = size;
1120         glt->palette = palette;
1121
1122         if (data)
1123         {
1124                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1125                 if (glt->inputtexels == NULL)
1126                         Sys_Error("R_LoadTexture: out of memory\n");
1127                 memcpy(glt->inputtexels, data, size);
1128         }
1129         else
1130                 glt->inputtexels = NULL;
1131
1132         R_FindImageForTexture(glt);
1133         R_PrecacheTexture(glt);
1134
1135         return (rtexture_t *)glt;
1136 }
1137
1138 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1139 {
1140         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1141 }
1142
1143 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)
1144 {
1145         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1146 }
1147
1148 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)
1149 {
1150         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1151 }
1152
1153 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1154 {
1155         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1156 }
1157
1158 int R_TextureHasAlpha(rtexture_t *rt)
1159 {
1160         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1161 }
1162
1163 int R_TextureWidth(rtexture_t *rt)
1164 {
1165         return rt ? ((gltexture_t *)rt)->width : 0;
1166 }
1167
1168 int R_TextureHeight(rtexture_t *rt)
1169 {
1170         return rt ? ((gltexture_t *)rt)->height : 0;
1171 }
1172
1173 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1174 {
1175         gltexture_t *glt;
1176         float iwidth, iheight, idepth;
1177         if (cls.state == ca_dedicated)
1178         {
1179                 if (x)
1180                         *x = 0;
1181                 if (y)
1182                         *y = 0;
1183                 if (z)
1184                         *z = 0;
1185                 if (fx1 || fy1 || fx2 || fy2)
1186                 {
1187                         if (fx1)
1188                                 *fx1 = 0;
1189                         if (fy1)
1190                                 *fy1 = 0;
1191                         if (fz1)
1192                                 *fz1 = 0;
1193                         if (fx2)
1194                                 *fx2 = 1;
1195                         if (fy2)
1196                                 *fy2 = 1;
1197                         if (fz2)
1198                                 *fz2 = 1;
1199                 }
1200                 return;
1201         }
1202         if (!rt)
1203                 Host_Error("R_FragmentLocation: no texture supplied\n");
1204         glt = (gltexture_t *)rt;
1205         if (glt->flags & TEXF_FRAGMENT)
1206         {
1207                 if (x)
1208                         *x = glt->x;
1209                 if (y)
1210                         *y = glt->y;
1211                 if (fx1 || fy1 || fx2 || fy2)
1212                 {
1213                         iwidth = 1.0f / glt->image->width;
1214                         iheight = 1.0f / glt->image->height;
1215                         idepth = 1.0f / glt->image->depth;
1216                         if (fx1)
1217                                 *fx1 = glt->x * iwidth;
1218                         if (fy1)
1219                                 *fy1 = glt->y * iheight;
1220                         if (fz1)
1221                                 *fz1 = glt->z * idepth;
1222                         if (fx2)
1223                                 *fx2 = (glt->x + glt->width) * iwidth;
1224                         if (fy2)
1225                                 *fy2 = (glt->y + glt->height) * iheight;
1226                         if (fz2)
1227                                 *fz2 = (glt->z + glt->depth) * idepth;
1228                 }
1229         }
1230         else
1231         {
1232                 if (x)
1233                         *x = 0;
1234                 if (y)
1235                         *y = 0;
1236                 if (z)
1237                         *z = 0;
1238                 if (fx1 || fy1 || fx2 || fy2)
1239                 {
1240                         if (fx1)
1241                                 *fx1 = 0;
1242                         if (fy1)
1243                                 *fy1 = 0;
1244                         if (fz1)
1245                                 *fz1 = 0;
1246                         if (fx2)
1247                                 *fx2 = 1;
1248                         if (fy2)
1249                                 *fy2 = 1;
1250                         if (fz2)
1251                                 *fz2 = 1;
1252                 }
1253         }
1254 }
1255
1256 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1257 {
1258         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1259 }
1260
1261 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1262 {
1263         return width;
1264 }
1265
1266 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1267 {
1268         gltexture_t *glt;
1269         if (rt == NULL)
1270                 Host_Error("R_UpdateTexture: no texture supplied\n");
1271         if (data == NULL)
1272                 Host_Error("R_UpdateTexture: no data supplied\n");
1273         glt = (gltexture_t *)rt;
1274
1275         // if it has not been uploaded yet, update the data that will be used when it is
1276         if (glt->inputtexels)
1277                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1278         else
1279                 R_Upload(glt, data);
1280 }
1281