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_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 430 {
 431         int glsize;
 432         int isloaded;
 433         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 434         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 435         gltexture_t *glt;
 436         gltexturepool_t *pool;
 437         if (printeach)
 438                 Con_Print("glsize input loaded mip alpha name\n");
 439         for (pool = gltexturepoolchain;pool;pool = pool->next)
 440         {
 441                 pooltotal = 0;
 442                 pooltotalt = 0;
 443                 pooltotalp = 0;
 444                 poolloaded = 0;
 445                 poolloadedt = 0;
 446                 poolloadedp = 0;
 447                 for (glt = pool->gltchain;glt;glt = glt->chain)
 448                 {
 449                         glsize = R_CalcTexelDataSize(glt);
 450                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 451                         pooltotal++;
 452                         pooltotalt += glsize;
 453                         pooltotalp += glt->inputdatasize;
 454                         if (isloaded)
 455                         {
 456                                 poolloaded++;
 457                                 poolloadedt += glsize;
 458                                 poolloadedp += glt->inputdatasize;
 459                         }
 460                         if (printeach)
 461                                 Con_Printf("%c%4i%c%c%4i%c %s %s %s %s\n", isloaded ? '[' : ' ', (glsize + 1023) / 1024, isloaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->inputdatasize + 1023) / 1024, glt->inputtexels ? ']' : ' ', isloaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier ? glt->identifier : "<unnamed>");
 462                 }
 463                 if (printpool)
 464                         Con_Printf("texturepool %10p total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", pool, pooltotal, pooltotalt / 1048576.0, pooltotalp / 1048576.0, poolloaded, poolloadedt / 1048576.0, poolloadedp / 1048576.0, pooltotal - poolloaded, (pooltotalt - poolloadedt) / 1048576.0, (pooltotalp - poolloadedp) / 1048576.0);
 465                 sumtotal += pooltotal;
 466                 sumtotalt += pooltotalt;
 467                 sumtotalp += pooltotalp;
 468                 sumloaded += poolloaded;
 469                 sumloadedt += poolloadedt;
 470                 sumloadedp += poolloadedp;
 471         }
 472         if (printtotal)
 473                 Con_Printf("textures total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", sumtotal, sumtotalt / 1048576.0, sumtotalp / 1048576.0, sumloaded, sumloadedt / 1048576.0, sumloadedp / 1048576.0, sumtotal - sumloaded, (sumtotalt - sumloadedt) / 1048576.0, (sumtotalp - sumloadedp) / 1048576.0);
 474 }
 475
 476 static void R_TextureStats_f(void)
 477 {
 478         R_TextureStats_Print(true, true, true);
 479 }
 480
 481 char engineversion[40];
 482
 483 static void r_textures_start(void)
 484 {
 485         // deal with size limits of various drivers (3dfx in particular)
 486         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 487         CHECKGLERROR
 488         // LordHavoc: allow any alignment
 489         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 490         CHECKGLERROR
 491
 492         // use the largest scrap texture size we can (not sure if this is really a good idea)
 493         for (block_size = 1;block_size < realmaxsize && block_size < gl_max_scrapsize.integer;block_size <<= 1);
 494
 495         texturemempool = Mem_AllocPool("Texture Info", 0, NULL);
 496         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)", 0, NULL);
 497         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers", 0, NULL);
 498
 499         // Disable JPEG screenshots if the DLL isn't loaded
 500         if (! JPEG_OpenLibrary ())
 501                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 502 }
 503
 504 static void r_textures_shutdown(void)
 505 {
 506         rtexturepool_t *temp;
 507
 508         JPEG_CloseLibrary ();
 509
 510         while(gltexturepoolchain)
 511         {
 512                 temp = (rtexturepool_t *) gltexturepoolchain;
 513                 R_FreeTexturePool(&temp);
 514         }
 515
 516         resizebuffersize = 0;
 517         texturebuffersize = 0;
 518         resizebuffer = NULL;
 519         colorconvertbuffer = NULL;
 520         texturebuffer = NULL;
 521         Mem_FreePool(&texturemempool);
 522         Mem_FreePool(&texturedatamempool);
 523         Mem_FreePool(&textureprocessingmempool);
 524 }
 525
 526 static void r_textures_newmap(void)
 527 {
 528 }
 529
 530 void R_Textures_Init (void)
 531 {
 532         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
 533         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 534         Cvar_RegisterVariable (&gl_max_scrapsize);
 535         Cvar_RegisterVariable (&gl_max_size);
 536         Cvar_RegisterVariable (&gl_picmip);
 537         Cvar_RegisterVariable (&r_lerpimages);
 538         Cvar_RegisterVariable (&r_precachetextures);
 539         Cvar_RegisterVariable (&gl_texture_anisotropy);
 540
 541         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 542 }
 543
 544 void R_Textures_Frame (void)
 545 {
 546         static int old_aniso = 0;
 547
 548         // could do procedural texture animation here, if we keep track of which
 549         // textures were accessed this frame...
 550
 551         // free the resize buffers
 552         resizebuffersize = 0;
 553         if (resizebuffer)
 554         {
 555                 Mem_Free(resizebuffer);
 556                 resizebuffer = NULL;
 557         }
 558         if (colorconvertbuffer)
 559         {
 560                 Mem_Free(colorconvertbuffer);
 561                 colorconvertbuffer = NULL;
 562         }
 563
 564         if (old_aniso != gl_texture_anisotropy.integer)
 565         {
 566                 gltextureimage_t *image;
 567                 gltexturepool_t *pool;
 568                 GLint oldbindtexnum;
 569
 570                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 571
 572                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 573
 574                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 575                 {
 576                         for (image = pool->imagechain;image;image = image->imagechain)
 577                         {
 578                                 // only update already uploaded images
 579                                 if (!(image->flags & GLTEXF_UPLOAD))
 580                                 {
 581                                         qglGetIntegerv(gltexturetypebindingenums[image->texturetype], &oldbindtexnum);
 582
 583                                         qglBindTexture(gltexturetypeenums[image->texturetype], image->texnum);
 584                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 585
 586                                         qglBindTexture(gltexturetypeenums[image->texturetype], oldbindtexnum);
 587                                 }
 588                         }
 589                 }
 590         }
 591 }
 592
 593 void R_MakeResizeBufferBigger(int size)
 594 {
 595         if (resizebuffersize < size)
 596         {
 597                 resizebuffersize = size;
 598                 if (resizebuffer)
 599                         Mem_Free(resizebuffer);
 600                 if (colorconvertbuffer)
 601                         Mem_Free(colorconvertbuffer);
 602                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 603                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 604                 if (!resizebuffer || !colorconvertbuffer)
 605                         Host_Error("R_Upload: out of memory\n");
 606         }
 607 }
 608
 609 static void GL_SetupTextureParameters(int flags, int texturetype)
 610 {
 611         int textureenum = gltexturetypeenums[texturetype];
 612         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 613
 614         CHECKGLERROR
 615
 616         if (gl_support_anisotropy)
 617         {
 618                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 619                 if (gl_texture_anisotropy.integer != aniso)
 620                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 621                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 622         }
 623         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 624         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 625         if (gltexturetypedimensions[texturetype] >= 3)
 626         {
 627                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 628         }
 629
 630         CHECKGLERROR
 631         if (flags & TEXF_FORCENEAREST)
 632         {
 633                 if (flags & TEXF_MIPMAP)
 634                 {
 635                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 636                 }
 637                 else
 638                 {
 639                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 640                 }
 641                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 642         }
 643         else if (flags & TEXF_FORCELINEAR)
 644         {
 645                 if (flags & TEXF_MIPMAP)
 646                 {
 647                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 648                         {
 649                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 650                         }
 651                         else
 652                         {
 653                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 654                         }
 655                 }
 656                 else
 657                 {
 658                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 659                 }
 660                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 661         }
 662         else
 663         {
 664                 if (flags & TEXF_MIPMAP)
 665                 {
 666                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 667                 }
 668                 else
 669                 {
 670                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 671                 }
 672                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 673         }
 674
 675         CHECKGLERROR
 676 }
 677
 678 static void R_Upload(gltexture_t *glt, qbyte *data)
 679 {
 680         int i, mip, width, height, depth;
 681         GLint oldbindtexnum;
 682         qbyte *prevbuffer;
 683         prevbuffer = data;
 684
 685         CHECKGLERROR
 686
 687         glt->texnum = glt->image->texnum;
 688         // we need to restore the texture binding after finishing the upload
 689         qglGetIntegerv(gltexturetypebindingenums[glt->image->texturetype], &oldbindtexnum);
 690         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 691         CHECKGLERROR
 692         glt->flags &= ~GLTEXF_UPLOAD;
 693
 694         if (glt->flags & TEXF_FRAGMENT)
 695         {
 696                 if (glt->image->flags & GLTEXF_UPLOAD)
 697                 {
 698                         glt->image->flags &= ~GLTEXF_UPLOAD;
 699                         Con_DPrint("uploaded new fragments image\n");
 700                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 701                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 702                         switch(glt->image->texturetype)
 703                         {
 704                         case GLTEXTURETYPE_1D:
 705                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 706                                 CHECKGLERROR
 707                                 break;
 708                         case GLTEXTURETYPE_2D:
 709                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 710                                 CHECKGLERROR
 711                                 break;
 712                         case GLTEXTURETYPE_3D:
 713                                 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);
 714                                 CHECKGLERROR
 715                                 break;
 716                         default:
 717                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 718                                 break;
 719                         }
 720                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 721                 }
 722
 723                 if (prevbuffer == NULL)
 724                 {
 725                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 726                         memset(resizebuffer, 0, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 727                         prevbuffer = resizebuffer;
 728                 }
 729                 else if (glt->textype->textype == TEXTYPE_PALETTE)
 730                 {
 731                         // promote paletted to RGBA, so we only have to worry about RGB and
 732                         // RGBA in the rest of this code
 733                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
 734                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
 735                         prevbuffer = colorconvertbuffer;
 736                 }
 737
 738                 switch(glt->image->texturetype)
 739                 {
 740                 case GLTEXTURETYPE_1D:
 741                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 742                         CHECKGLERROR
 743                         break;
 744                 case GLTEXTURETYPE_2D:
 745                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 746                         CHECKGLERROR
 747                         break;
 748                 case GLTEXTURETYPE_3D:
 749                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 750                         CHECKGLERROR
 751                         break;
 752                 default:
 753                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 754                         break;
 755                 }
 756         }
 757         else
 758         {
 759                 glt->image->flags &= ~GLTEXF_UPLOAD;
 760
 761                 // these are rounded up versions of the size to do better resampling
 762                 for (width  = 1;width  < glt->width ;width  <<= 1);
 763                 for (height = 1;height < glt->height;height <<= 1);
 764                 for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 765
 766                 R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
 767
 768                 if (prevbuffer == NULL)
 769                 {
 770                         width = glt->image->width;
 771                         height = glt->image->height;
 772                         depth = glt->image->depth;
 773                         memset(resizebuffer, 0, width * height * depth * glt->image->bytesperpixel);
 774                         prevbuffer = resizebuffer;
 775                 }
 776                 else
 777                 {
 778                         if (glt->textype->textype == TEXTYPE_PALETTE)
 779                         {
 780                                 // promote paletted to RGBA, so we only have to worry about RGB and
 781                                 // RGBA in the rest of this code
 782                                 Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
 783                                 prevbuffer = colorconvertbuffer;
 784                         }
 785                 }
 786
 787                 // cubemaps contain multiple images and thus get processed a bit differently
 788                 if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
 789                 {
 790                         if (glt->width != width || glt->height != height || glt->depth != depth)
 791                         {
 792                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 793                                 prevbuffer = resizebuffer;
 794                         }
 795                         // picmip/max_size
 796                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 797                         {
 798                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 799                                 prevbuffer = resizebuffer;
 800                         }
 801                 }
 802                 mip = 0;
 803                 switch(glt->image->texturetype)
 804                 {
 805                 case GLTEXTURETYPE_1D:
 806                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 807                         CHECKGLERROR
 808                         if (glt->flags & TEXF_MIPMAP)
 809                         {
 810                                 while (width > 1 || height > 1 || depth > 1)
 811                                 {
 812                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 813                                         prevbuffer = resizebuffer;
 814                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 815                                         CHECKGLERROR
 816                                 }
 817                         }
 818                         break;
 819                 case GLTEXTURETYPE_2D:
 820                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 821                         CHECKGLERROR
 822                         if (glt->flags & TEXF_MIPMAP)
 823                         {
 824                                 while (width > 1 || height > 1 || depth > 1)
 825                                 {
 826                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 827                                         prevbuffer = resizebuffer;
 828                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 829                                         CHECKGLERROR
 830                                 }
 831                         }
 832                         break;
 833                 case GLTEXTURETYPE_3D:
 834                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 835                         CHECKGLERROR
 836                         if (glt->flags & TEXF_MIPMAP)
 837                         {
 838                                 while (width > 1 || height > 1 || depth > 1)
 839                                 {
 840                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 841                                         prevbuffer = resizebuffer;
 842                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 843                                         CHECKGLERROR
 844                                 }
 845                         }
 846                         break;
 847                 case GLTEXTURETYPE_CUBEMAP:
 848                         // convert and upload each side in turn,
 849                         // from a continuous block of input texels
 850                         texturebuffer = prevbuffer;
 851                         for (i = 0;i < 6;i++)
 852                         {
 853                                 prevbuffer = texturebuffer;
 854                                 texturebuffer += glt->width * glt->height * glt->depth * glt->textype->inputbytesperpixel;
 855                                 if (glt->width != width || glt->height != height || glt->depth != depth)
 856                                 {
 857                                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 858                                         prevbuffer = resizebuffer;
 859                                 }
 860                                 // picmip/max_size
 861                                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 862                                 {
 863                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 864                                         prevbuffer = resizebuffer;
 865                                 }
 866                                 mip = 0;
 867                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 868                                 CHECKGLERROR
 869                                 if (glt->flags & TEXF_MIPMAP)
 870                                 {
 871                                         while (width > 1 || height > 1 || depth > 1)
 872                                         {
 873                                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 874                                                 prevbuffer = resizebuffer;
 875                                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 876                                                 CHECKGLERROR
 877                                         }
 878                                 }
 879                         }
 880                         break;
 881                 }
 882                 GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 883         }
 884         qglBindTexture(gltexturetypeenums[glt->image->texturetype], oldbindtexnum);
 885 }
 886
 887 static void R_FindImageForTexture(gltexture_t *glt)
 888 {
 889         int i, j, best, best2, x, y, z, w, h, d, picmip;
 890         textypeinfo_t *texinfo;
 891         gltexturepool_t *pool;
 892         gltextureimage_t *image, **imagechainpointer;
 893         texinfo = glt->textype;
 894         pool = glt->pool;
 895
 896         // remains -1 until uploaded
 897         glt->texnum = -1;
 898
 899         x = 0;
 900         y = 0;
 901         z = 0;
 902         w = glt->width;
 903         h = glt->height;
 904         d = glt->depth;
 905         if (glt->flags & TEXF_FRAGMENT)
 906         {
 907                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 908                 {
 909                         image = *imagechainpointer;
 910                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 911                                 continue;
 912                         if (image->texturetype != glt->texturetype)
 913                                 continue;
 914                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP))
 915                                 continue;
 916                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 917                                 continue;
 918                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 919                                 continue;
 920
 921                         // got a fragments texture, find a place in it if we can
 922                         for (best = image->width, i = 0;i < image->width - w;i++)
 923                         {
 924                                 for (best2 = 0, j = 0;j < w;j++)
 925                                 {
 926                                         if (image->blockallocation[i+j] >= best)
 927                                                 break;
 928                                         if (best2 < image->blockallocation[i+j])
 929                                                 best2 = image->blockallocation[i+j];
 930                                 }
 931                                 if (j == w)
 932                                 {
 933                                         // this is a valid spot
 934                                         x = i;
 935                                         y = best = best2;
 936                                 }
 937                         }
 938
 939                         if (best + h > image->height)
 940                                 continue;
 941
 942                         for (i = 0;i < w;i++)
 943                                 image->blockallocation[x + i] = best + h;
 944
 945                         glt->x = x;
 946                         glt->y = y;
 947                         glt->z = 0;
 948                         glt->image = image;
 949                         image->texturecount++;
 950                         return;
 951                 }
 952
 953                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 954                 if (image == NULL)
 955                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 956                 image->type = GLIMAGETYPE_FRAGMENTS;
 957                 // make sure the created image is big enough for the fragment
 958                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 959                 image->height = 1;
 960                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 961                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 962                 image->depth = 1;
 963                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 964                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 965                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
 966                 memset(image->blockallocation, 0, image->width * sizeof(short));
 967
 968                 x = 0;
 969                 y = 0;
 970                 z = 0;
 971                 for (i = 0;i < w;i++)
 972                         image->blockallocation[x + i] = y + h;
 973         }
 974         else
 975         {
 976                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 977
 978                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 979                 if (image == NULL)
 980                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 981                 image->type = GLIMAGETYPE_TILE;
 982                 image->blockallocation = NULL;
 983
 984                 picmip = 0;
 985                 if (glt->flags & TEXF_PICMIP)
 986                         picmip = gl_picmip.integer;
 987                 // calculate final size
 988                 if (gl_max_size.integer > realmaxsize)
 989                         Cvar_SetValue("gl_max_size", realmaxsize);
 990                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 991                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 992                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
 993                 for (image->width >>= picmip;image->width > gl_max_size.integer;image->width >>= 1);
 994                 for (image->height >>= picmip;image->height > gl_max_size.integer;image->height >>= 1);
 995                 for (image->depth >>= picmip;image->depth > gl_max_size.integer;image->depth >>= 1);
 996                 if (image->width < 1) image->width = 1;
 997                 if (image->height < 1) image->height = 1;
 998                 if (image->depth < 1) image->depth = 1;
 999         }
1000         image->texturetype = glt->texturetype;
1001         image->glinternalformat = texinfo->glinternalformat;
1002         image->glformat = texinfo->glformat;
1003         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP | TEXF_PICMIP)) | GLTEXF_UPLOAD;
1004         image->bytesperpixel = texinfo->internalbytesperpixel;
1005         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1006         // get a texture number to use
1007         qglGenTextures(1, &image->texnum);
1008         *imagechainpointer = image;
1009         image->texturecount++;
1010
1011         glt->x = x;
1012         glt->y = y;
1013         glt->y = z;
1014         glt->image = image;
1015 }
1016
1017 // note: R_FindImageForTexture must be called before this
1018 static void R_UploadTexture (gltexture_t *glt)
1019 {
1020         if (!(glt->flags & GLTEXF_UPLOAD))
1021                 return;
1022
1023         R_Upload(glt, glt->inputtexels);
1024         if (glt->inputtexels)
1025         {
1026                 Mem_Free(glt->inputtexels);
1027                 glt->inputtexels = NULL;
1028                 glt->flags |= GLTEXF_DESTROYED;
1029         }
1030         else if (glt->flags & GLTEXF_DESTROYED)
1031                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
1032 }
1033
1034 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)
1035 {
1036         int i, size;
1037         gltexture_t *glt;
1038         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1039         textypeinfo_t *texinfo;
1040
1041         if (cls.state == ca_dedicated)
1042                 return NULL;
1043
1044         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
1045                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
1046         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
1047                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
1048         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
1049                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
1050
1051         /*
1052         glt = R_FindTexture (pool, identifier);
1053         if (glt)
1054         {
1055                 Con_Printf("R_LoadTexture: replacing existing texture %s\n", identifier);
1056                 R_FreeTexture((rtexture_t *)glt);
1057         }
1058         */
1059
1060         texinfo = R_GetTexTypeInfo(textype, flags);
1061         size = width * height * depth * sides * texinfo->inputbytesperpixel;
1062         if (size < 1)
1063                 Sys_Error("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
1064
1065         // clear the alpha flag if the texture has no transparent pixels
1066         switch(textype)
1067         {
1068         case TEXTYPE_PALETTE:
1069                 if (flags & TEXF_ALPHA)
1070                 {
1071                         flags &= ~TEXF_ALPHA;
1072                         if (data)
1073                         {
1074                                 for (i = 0;i < size;i++)
1075                                 {
1076                                         if (((qbyte *)&palette[data[i]])[3] < 255)
1077                                         {
1078                                                 flags |= TEXF_ALPHA;
1079                                                 break;
1080                                         }
1081                                 }
1082                         }
1083                 }
1084                 break;
1085         case TEXTYPE_RGB:
1086                 if (flags & TEXF_ALPHA)
1087                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
1088                 break;
1089         case TEXTYPE_RGBA:
1090                 if (flags & TEXF_ALPHA)
1091                 {
1092                         flags &= ~TEXF_ALPHA;
1093                         if (data)
1094                         {
1095                                 for (i = 3;i < size;i += 4)
1096                                 {
1097                                         if (data[i] < 255)
1098                                         {
1099                                                 flags |= TEXF_ALPHA;
1100                                                 break;
1101                                         }
1102                                 }
1103                         }
1104                 }
1105                 break;
1106         case TEXTYPE_DSDT:
1107                 break;
1108         default:
1109                 Host_Error("R_LoadTexture: unknown texture type\n");
1110         }
1111
1112         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1113         if (identifier)
1114         {
1115                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1116                 strcpy (glt->identifier, identifier);
1117         }
1118         else
1119                 glt->identifier = NULL;
1120         glt->pool = pool;
1121         glt->chain = pool->gltchain;
1122         pool->gltchain = glt;
1123         glt->width = width;
1124         glt->height = height;
1125         glt->depth = depth;
1126         glt->flags = flags | GLTEXF_UPLOAD;
1127         glt->textype = texinfo;
1128         glt->texturetype = texturetype;
1129         glt->inputdatasize = size;
1130         glt->palette = palette;
1131
1132         if (data)
1133         {
1134                 glt->inputtexels = Mem_Alloc(texturedatamempool, size);
1135                 if (glt->inputtexels == NULL)
1136                         Sys_Error("R_LoadTexture: out of memory\n");
1137                 memcpy(glt->inputtexels, data, size);
1138         }
1139         else
1140                 glt->inputtexels = NULL;
1141
1142         R_FindImageForTexture(glt);
1143         R_PrecacheTexture(glt);
1144
1145         return (rtexture_t *)glt;
1146 }
1147
1148 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1149 {
1150         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1151 }
1152
1153 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)
1154 {
1155         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1156 }
1157
1158 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)
1159 {
1160         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1161 }
1162
1163 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1164 {
1165         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1166 }
1167
1168 int R_TextureHasAlpha(rtexture_t *rt)
1169 {
1170         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1171 }
1172
1173 int R_TextureWidth(rtexture_t *rt)
1174 {
1175         return rt ? ((gltexture_t *)rt)->width : 0;
1176 }
1177
1178 int R_TextureHeight(rtexture_t *rt)
1179 {
1180         return rt ? ((gltexture_t *)rt)->height : 0;
1181 }
1182
1183 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1184 {
1185         gltexture_t *glt;
1186         float iwidth, iheight, idepth;
1187         if (cls.state == ca_dedicated)
1188         {
1189                 if (x)
1190                         *x = 0;
1191                 if (y)
1192                         *y = 0;
1193                 if (z)
1194                         *z = 0;
1195                 if (fx1 || fy1 || fx2 || fy2)
1196                 {
1197                         if (fx1)
1198                                 *fx1 = 0;
1199                         if (fy1)
1200                                 *fy1 = 0;
1201                         if (fz1)
1202                                 *fz1 = 0;
1203                         if (fx2)
1204                                 *fx2 = 1;
1205                         if (fy2)
1206                                 *fy2 = 1;
1207                         if (fz2)
1208                                 *fz2 = 1;
1209                 }
1210                 return;
1211         }
1212         if (!rt)
1213                 Host_Error("R_FragmentLocation: no texture supplied\n");
1214         glt = (gltexture_t *)rt;
1215         if (glt->flags & TEXF_FRAGMENT)
1216         {
1217                 if (x)
1218                         *x = glt->x;
1219                 if (y)
1220                         *y = glt->y;
1221                 if (fx1 || fy1 || fx2 || fy2)
1222                 {
1223                         iwidth = 1.0f / glt->image->width;
1224                         iheight = 1.0f / glt->image->height;
1225                         idepth = 1.0f / glt->image->depth;
1226                         if (fx1)
1227                                 *fx1 = glt->x * iwidth;
1228                         if (fy1)
1229                                 *fy1 = glt->y * iheight;
1230                         if (fz1)
1231                                 *fz1 = glt->z * idepth;
1232                         if (fx2)
1233                                 *fx2 = (glt->x + glt->width) * iwidth;
1234                         if (fy2)
1235                                 *fy2 = (glt->y + glt->height) * iheight;
1236                         if (fz2)
1237                                 *fz2 = (glt->z + glt->depth) * idepth;
1238                 }
1239         }
1240         else
1241         {
1242                 if (x)
1243                         *x = 0;
1244                 if (y)
1245                         *y = 0;
1246                 if (z)
1247                         *z = 0;
1248                 if (fx1 || fy1 || fx2 || fy2)
1249                 {
1250                         if (fx1)
1251                                 *fx1 = 0;
1252                         if (fy1)
1253                                 *fy1 = 0;
1254                         if (fz1)
1255                                 *fz1 = 0;
1256                         if (fx2)
1257                                 *fx2 = 1;
1258                         if (fy2)
1259                                 *fy2 = 1;
1260                         if (fz2)
1261                                 *fz2 = 1;
1262                 }
1263         }
1264 }
1265
1266 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1267 {
1268         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1269 }
1270
1271 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1272 {
1273         return width;
1274 }
1275
1276 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1277 {
1278         gltexture_t *glt;
1279         if (rt == NULL)
1280                 Host_Error("R_UpdateTexture: no texture supplied\n");
1281         if (data == NULL)
1282                 Host_Error("R_UpdateTexture: no data supplied\n");
1283         glt = (gltexture_t *)rt;
1284
1285         // if it has not been uploaded yet, update the data that will be used when it is
1286         if (glt->inputtexels)
1287                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1288         else
1289                 R_Upload(glt, data);
1290 }
1291