gl_textures.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5 #include "image_png.h"
   6
   7 cvar_t gl_max_size = {CVAR_SAVE, "gl_max_size", "2048", "maximum allowed texture size, can be used to reduce video memory usage, note: this is automatically reduced to match video card capabilities (such as 256 on 3Dfx cards before Voodoo4/5)"};
   8 cvar_t gl_picmip = {CVAR_SAVE, "gl_picmip", "0", "reduces resolution of textures by powers of 2, for example 1 will halve width/height, reducing texture memory usage by 75%"};
   9 cvar_t r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1", "bilinear filters images when scaling them up to power of 2 size (mode 1), looks better than glquake (mode 0)"};
  10 cvar_t r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1", "0 = never upload textures until used, 1 = upload most textures before use (exceptions: rarely used skin colormap layers), 2 = upload all textures before use (can increase texture memory usage significantly)"};
  11 cvar_t gl_texture_anisotropy = {CVAR_SAVE, "gl_texture_anisotropy", "1", "anisotropic filtering quality (if supported by hardware), 1 sample (no anisotropy) and 8 sample (8 tap anisotropy) are recommended values"};
  12 cvar_t gl_texturecompression = {CVAR_SAVE, "gl_texturecompression", "0", "whether to compress textures, a value of 0 disables compression (even if the individual cvars are 1), 1 enables fast (low quality) compression at startup, 2 enables slow (high quality) compression at startup"};
  13 cvar_t gl_texturecompression_color = {CVAR_SAVE, "gl_texturecompression_color", "1", "whether to compress colormap (diffuse) textures"};
  14 cvar_t gl_texturecompression_normal = {CVAR_SAVE, "gl_texturecompression_normal", "1", "whether to compress normalmap (normalmap) textures"};
  15 cvar_t gl_texturecompression_gloss = {CVAR_SAVE, "gl_texturecompression_gloss", "1", "whether to compress glossmap (specular) textures"};
  16 cvar_t gl_texturecompression_glow = {CVAR_SAVE, "gl_texturecompression_glow", "1", "whether to compress glowmap (luma) textures"};
  17 cvar_t gl_texturecompression_2d = {CVAR_SAVE, "gl_texturecompression_2d", "1", "whether to compress 2d (hud/menu) textures other than the font"};
  18 cvar_t gl_texturecompression_q3bsplightmaps = {CVAR_SAVE, "gl_texturecompression_q3bsplightmaps", "1", "whether to compress lightmaps in q3bsp format levels"};
  19 cvar_t gl_texturecompression_q3bspdeluxemaps = {CVAR_SAVE, "gl_texturecompression_q3bspdeluxemaps", "1", "whether to compress deluxemaps in q3bsp format levels (only levels compiled with q3map2 -deluxe have these)"};
  20 cvar_t gl_texturecompression_sky = {CVAR_SAVE, "gl_texturecompression_sky", "0", "whether to compress sky textures"};
  21 cvar_t gl_texturecompression_lightcubemaps = {CVAR_SAVE, "gl_texturecompression_lightcubemaps", "1", "whether to compress light cubemaps (spotlights and other light projection images)"};
  22
  23 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  24 int             gl_filter_mag = GL_LINEAR;
  25
  26
  27 static mempool_t *texturemempool;
  28
  29 // note: this must not conflict with TEXF_ flags in r_textures.h
  30 // cleared when a texture is uploaded
  31 #define GLTEXF_UPLOAD           0x00010000
  32 // bitmask for mismatch checking
  33 #define GLTEXF_IMPORTANTBITS (0)
  34 // set when image is uploaded and freed
  35 #define GLTEXF_DESTROYED        0x00040000
  36 // dynamic texture (treat texnum == 0 differently)
  37 #define GLTEXF_DYNAMIC          0x00080000
  38
  39 typedef struct textypeinfo_s
  40 {
  41         int textype;
  42         int inputbytesperpixel;
  43         int internalbytesperpixel;
  44         float glinternalbytesperpixel;
  45         int glformat;
  46         int glinternalformat;
  47 }
  48 textypeinfo_t;
  49
  50 static textypeinfo_t textype_palette                = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_RGBA   , 3};
  51 static textypeinfo_t textype_rgba                   = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 3};
  52 static textypeinfo_t textype_bgra                   = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 3};
  53 static textypeinfo_t textype_palette_alpha          = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_RGBA   , 4};
  54 static textypeinfo_t textype_rgba_alpha             = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 4};
  55 static textypeinfo_t textype_bgra_alpha             = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 4};
  56 static textypeinfo_t textype_palette_compress       = {TEXTYPE_PALETTE, 1, 4, 0.5f, GL_RGBA   , GL_COMPRESSED_RGB_ARB};
  57 static textypeinfo_t textype_rgba_compress          = {TEXTYPE_RGBA   , 4, 4, 0.5f, GL_RGBA   , GL_COMPRESSED_RGB_ARB};
  58 static textypeinfo_t textype_bgra_compress          = {TEXTYPE_BGRA   , 4, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB};
  59 static textypeinfo_t textype_palette_alpha_compress = {TEXTYPE_PALETTE, 1, 4, 1.0f, GL_RGBA   , GL_COMPRESSED_RGBA_ARB};
  60 static textypeinfo_t textype_rgba_alpha_compress    = {TEXTYPE_RGBA   , 4, 4, 1.0f, GL_RGBA   , GL_COMPRESSED_RGBA_ARB};
  61 static textypeinfo_t textype_bgra_alpha_compress    = {TEXTYPE_BGRA   , 4, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB};
  62
  63 #define GLTEXTURETYPE_1D 0
  64 #define GLTEXTURETYPE_2D 1
  65 #define GLTEXTURETYPE_3D 2
  66 #define GLTEXTURETYPE_CUBEMAP 3
  67
  68 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  69 static int gltexturetypebindingenums[4] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB};
  70 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  71 static int cubemapside[6] =
  72 {
  73         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  74         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  75         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  76         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  77         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  78         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  79 };
  80
  81 typedef struct gltexture_s
  82 {
  83         // this field is exposed to the R_GetTexture macro, for speed reasons
  84         // (must be identical in rtexture_t)
  85         int texnum; // GL texture slot number
  86
  87         // dynamic texture stuff [11/22/2007 Black]
  88         // used to hold the texture number of dirty textures
  89         int dirtytexnum;
  90         updatecallback_t updatecallback;
  91         void *updatacallback_data;
  92         // --- [11/22/2007 Black]
  93
  94         // pointer to texturepool (check this to see if the texture is allocated)
  95         struct gltexturepool_s *pool;
  96         // pointer to next texture in texturepool chain
  97         struct gltexture_s *chain;
  98         // name of the texture (this might be removed someday), no duplicates
  99         char identifier[MAX_QPATH + 32];
 100         // original data size in *inputtexels
 101         int inputwidth, inputheight, inputdepth;
 102         // copy of the original texture(s) supplied to the upload function, for
 103         // delayed uploads (non-precached)
 104         unsigned char *inputtexels;
 105         // original data size in *inputtexels
 106         int inputdatasize;
 107         // flags supplied to the LoadTexture function
 108         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 109         int flags;
 110         // pointer to one of the textype_ structs
 111         textypeinfo_t *textype;
 112         // one of the GLTEXTURETYPE_ values
 113         int texturetype;
 114         // palette if the texture is TEXTYPE_PALETTE
 115         const unsigned int *palette;
 116         // actual stored texture size after gl_picmip and gl_max_size are applied
 117         // (power of 2 if gl_support_arb_texture_non_power_of_two is not supported)
 118         int tilewidth, tileheight, tiledepth;
 119         // 1 or 6 depending on texturetype
 120         int sides;
 121         // bytes per pixel
 122         int bytesperpixel;
 123         // GL_RGB or GL_RGBA
 124         int glformat;
 125         // 3 or 4
 126         int glinternalformat;
 127 }
 128 gltexture_t;
 129
 130 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 131
 132 typedef struct gltexturepool_s
 133 {
 134         unsigned int sentinel;
 135         struct gltexture_s *gltchain;
 136         struct gltexturepool_s *next;
 137 }
 138 gltexturepool_t;
 139
 140 static gltexturepool_t *gltexturepoolchain = NULL;
 141
 142 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
 143 static int resizebuffersize = 0;
 144 static unsigned char *texturebuffer;
 145 static int texturebuffersize = 0;
 146
 147 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 148 {
 149         if ((flags & TEXF_COMPRESS) && gl_texturecompression.integer >= 1 && gl_support_texture_compression)
 150         {
 151                 if (flags & TEXF_ALPHA)
 152                 {
 153                         switch(textype)
 154                         {
 155                         case TEXTYPE_PALETTE:
 156                                 return &textype_palette_alpha_compress;
 157                         case TEXTYPE_RGBA:
 158                                 return &textype_rgba_alpha_compress;
 159                         case TEXTYPE_BGRA:
 160                                 return &textype_bgra_alpha_compress;
 161                         default:
 162                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 163                                 return NULL;
 164                         }
 165                 }
 166                 else
 167                 {
 168                         switch(textype)
 169                         {
 170                         case TEXTYPE_PALETTE:
 171                                 return &textype_palette_compress;
 172                         case TEXTYPE_RGBA:
 173                                 return &textype_rgba_compress;
 174                         case TEXTYPE_BGRA:
 175                                 return &textype_bgra_compress;
 176                         default:
 177                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 178                                 return NULL;
 179                         }
 180                 }
 181         }
 182         else
 183         {
 184                 if (flags & TEXF_ALPHA)
 185                 {
 186                         switch(textype)
 187                         {
 188                         case TEXTYPE_PALETTE:
 189                                 return &textype_palette_alpha;
 190                         case TEXTYPE_RGBA:
 191                                 return &textype_rgba_alpha;
 192                         case TEXTYPE_BGRA:
 193                                 return &textype_bgra_alpha;
 194                         default:
 195                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 196                                 return NULL;
 197                         }
 198                 }
 199                 else
 200                 {
 201                         switch(textype)
 202                         {
 203                         case TEXTYPE_PALETTE:
 204                                 return &textype_palette;
 205                         case TEXTYPE_RGBA:
 206                                 return &textype_rgba;
 207                         case TEXTYPE_BGRA:
 208                                 return &textype_bgra;
 209                         default:
 210                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 211                                 return NULL;
 212                         }
 213                 }
 214         }
 215         return NULL; // this line only to hush compiler warnings
 216 }
 217
 218 // dynamic texture code [11/22/2007 Black]
 219 void R_MarkDirtyTexture(rtexture_t *rt) {
 220         gltexture_t *glt = (gltexture_t*) rt;
 221         if( !glt ) {
 222                 return;
 223         }
 224
 225         // dont do anything if the texture is already dirty (and make sure this *is* a dynamic texture after all!)
 226         if( !glt->dirtytexnum && glt->flags & GLTEXF_DYNAMIC ) {
 227                 glt->dirtytexnum = glt->texnum;
 228                 // mark it as dirty, so R_RealGetTexture gets called
 229                 glt->texnum = 0;
 230         }
 231 }
 232
 233 void R_MakeTextureDynamic(rtexture_t *rt, updatecallback_t updatecallback, void *data) {
 234         gltexture_t *glt = (gltexture_t*) rt;
 235         if( !glt ) {
 236                 return;
 237         }
 238
 239         glt->flags |= GLTEXF_DYNAMIC;
 240         glt->updatecallback = updatecallback;
 241         glt->updatacallback_data = data;
 242 }
 243
 244 static void R_UpdateDynamicTexture(gltexture_t *glt) {
 245         glt->texnum = glt->dirtytexnum;
 246         // reset dirtytexnum again (not dirty anymore)
 247         glt->dirtytexnum = 0;
 248         // TODO: now assert that t->texnum != 0 ?
 249         if( glt->updatecallback ) {
 250                 glt->updatecallback( (rtexture_t*) glt, glt->updatacallback_data );
 251         }
 252 }
 253
 254 static void R_UploadTexture(gltexture_t *t);
 255
 256 static void R_PrecacheTexture(gltexture_t *glt)
 257 {
 258         int precache;
 259         precache = false;
 260         if (glt->flags & TEXF_ALWAYSPRECACHE)
 261                 precache = true;
 262         else if (r_precachetextures.integer >= 2)
 263                 precache = true;
 264         else if (r_precachetextures.integer >= 1)
 265                 if (glt->flags & TEXF_PRECACHE)
 266                         precache = true;
 267
 268         if (precache)
 269                 R_UploadTexture(glt);
 270 }
 271
 272 int R_RealGetTexture(rtexture_t *rt)
 273 {
 274         if (rt)
 275         {
 276                 gltexture_t *glt;
 277                 glt = (gltexture_t *)rt;
 278                 if (glt->flags & GLTEXF_DYNAMIC)
 279                         R_UpdateDynamicTexture(glt);
 280                 if (glt->flags & GLTEXF_UPLOAD)
 281                         R_UploadTexture(glt);
 282
 283                 return glt->texnum;
 284         }
 285         else
 286                 return 0;
 287 }
 288
 289 void R_FreeTexture(rtexture_t *rt)
 290 {
 291         gltexture_t *glt, **gltpointer;
 292
 293         glt = (gltexture_t *)rt;
 294         if (glt == NULL)
 295                 Host_Error("R_FreeTexture: texture == NULL");
 296
 297         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 298         if (*gltpointer == glt)
 299                 *gltpointer = glt->chain;
 300         else
 301                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 302
 303         if (glt->texnum)
 304         {
 305                 CHECKGLERROR
 306                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 307         }
 308
 309         if (glt->inputtexels)
 310                 Mem_Free(glt->inputtexels);
 311         Mem_Free(glt);
 312 }
 313
 314 rtexturepool_t *R_AllocTexturePool(void)
 315 {
 316         gltexturepool_t *pool;
 317         if (texturemempool == NULL)
 318                 return NULL;
 319         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 320         if (pool == NULL)
 321                 return NULL;
 322         pool->next = gltexturepoolchain;
 323         gltexturepoolchain = pool;
 324         pool->sentinel = TEXTUREPOOL_SENTINEL;
 325         return (rtexturepool_t *)pool;
 326 }
 327
 328 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 329 {
 330         gltexturepool_t *pool, **poolpointer;
 331         if (rtexturepool == NULL)
 332                 return;
 333         if (*rtexturepool == NULL)
 334                 return;
 335         pool = (gltexturepool_t *)(*rtexturepool);
 336         *rtexturepool = NULL;
 337         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 338                 Host_Error("R_FreeTexturePool: pool already freed");
 339         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 340         if (*poolpointer == pool)
 341                 *poolpointer = pool->next;
 342         else
 343                 Host_Error("R_FreeTexturePool: pool not linked");
 344         while (pool->gltchain)
 345                 R_FreeTexture((rtexture_t *)pool->gltchain);
 346         Mem_Free(pool);
 347 }
 348
 349
 350 typedef struct glmode_s
 351 {
 352         char *name;
 353         int minification, magnification;
 354 }
 355 glmode_t;
 356
 357 static glmode_t modes[6] =
 358 {
 359         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 360         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 361         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 362         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 363         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 364         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 365 };
 366
 367 static void GL_TextureMode_f (void)
 368 {
 369         int i;
 370         GLint oldbindtexnum;
 371         gltexture_t *glt;
 372         gltexturepool_t *pool;
 373
 374         if (Cmd_Argc() == 1)
 375         {
 376                 for (i = 0;i < 6;i++)
 377                 {
 378                         if (gl_filter_min == modes[i].minification)
 379                         {
 380                                 Con_Printf("%s\n", modes[i].name);
 381                                 return;
 382                         }
 383                 }
 384                 Con_Print("current filter is unknown???\n");
 385                 return;
 386         }
 387
 388         for (i = 0;i < 6;i++)
 389                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 390                         break;
 391         if (i == 6)
 392         {
 393                 Con_Print("bad filter name\n");
 394                 return;
 395         }
 396
 397         gl_filter_min = modes[i].minification;
 398         gl_filter_mag = modes[i].magnification;
 399
 400         // change all the existing mipmap texture objects
 401         // FIXME: force renderer(/client/something?) restart instead?
 402         CHECKGLERROR
 403         for (pool = gltexturepoolchain;pool;pool = pool->next)
 404         {
 405                 for (glt = pool->gltchain;glt;glt = glt->chain)
 406                 {
 407                         // only update already uploaded images
 408                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 409                         {
 410                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 411                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 412                                 if (glt->flags & TEXF_MIPMAP)
 413                                 {
 414                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 415                                 }
 416                                 else
 417                                 {
 418                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 419                                 }
 420                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 421                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 422                         }
 423                 }
 424         }
 425 }
 426
 427 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 428 {
 429         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 430
 431         if (gl_max_size.integer > gl_max_texture_size)
 432                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 433
 434         switch (texturetype)
 435         {
 436         default:
 437         case GLTEXTURETYPE_1D:
 438         case GLTEXTURETYPE_2D:
 439                 maxsize = gl_max_texture_size;
 440                 break;
 441         case GLTEXTURETYPE_3D:
 442                 maxsize = gl_max_3d_texture_size;
 443                 break;
 444         case GLTEXTURETYPE_CUBEMAP:
 445                 maxsize = gl_max_cube_map_texture_size;
 446                 break;
 447         }
 448
 449         if (flags & TEXF_PICMIP)
 450         {
 451                 maxsize = min(maxsize, gl_max_size.integer);
 452                 picmip = gl_picmip.integer;
 453         }
 454
 455         if (outwidth)
 456         {
 457                 if (gl_support_arb_texture_non_power_of_two)
 458                         width2 = min(inwidth >> picmip, maxsize);
 459                 else
 460                 {
 461                         for (width2 = 1;width2 < inwidth;width2 <<= 1);
 462                         for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 463                 }
 464                 *outwidth = max(1, width2);
 465         }
 466         if (outheight)
 467         {
 468                 if (gl_support_arb_texture_non_power_of_two)
 469                         height2 = min(inheight >> picmip, maxsize);
 470                 else
 471                 {
 472                         for (height2 = 1;height2 < inheight;height2 <<= 1);
 473                         for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 474                 }
 475                 *outheight = max(1, height2);
 476         }
 477         if (outdepth)
 478         {
 479                 if (gl_support_arb_texture_non_power_of_two)
 480                         depth2 = min(indepth >> picmip, maxsize);
 481                 else
 482                 {
 483                         for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 484                         for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 485                 }
 486                 *outdepth = max(1, depth2);
 487         }
 488 }
 489
 490
 491 static int R_CalcTexelDataSize (gltexture_t *glt)
 492 {
 493         int width2, height2, depth2, size;
 494
 495         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
 496
 497         size = width2 * height2 * depth2;
 498
 499         if (glt->flags & TEXF_MIPMAP)
 500         {
 501                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 502                 {
 503                         if (width2 > 1)
 504                                 width2 >>= 1;
 505                         if (height2 > 1)
 506                                 height2 >>= 1;
 507                         if (depth2 > 1)
 508                                 depth2 >>= 1;
 509                         size += width2 * height2 * depth2;
 510                 }
 511         }
 512
 513         return (int)(size * glt->textype->glinternalbytesperpixel) * glt->sides;
 514 }
 515
 516 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 517 {
 518         int glsize;
 519         int isloaded;
 520         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 521         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 522         gltexture_t *glt;
 523         gltexturepool_t *pool;
 524         if (printeach)
 525                 Con_Print("glsize input loaded mip alpha name\n");
 526         for (pool = gltexturepoolchain;pool;pool = pool->next)
 527         {
 528                 pooltotal = 0;
 529                 pooltotalt = 0;
 530                 pooltotalp = 0;
 531                 poolloaded = 0;
 532                 poolloadedt = 0;
 533                 poolloadedp = 0;
 534                 for (glt = pool->gltchain;glt;glt = glt->chain)
 535                 {
 536                         glsize = R_CalcTexelDataSize(glt);
 537                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 538                         pooltotal++;
 539                         pooltotalt += glsize;
 540                         pooltotalp += glt->inputdatasize;
 541                         if (isloaded)
 542                         {
 543                                 poolloaded++;
 544                                 poolloadedt += glsize;
 545                                 poolloadedp += glt->inputdatasize;
 546                         }
 547                         if (printeach)
 548                                 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);
 549                 }
 550                 if (printpool)
 551                         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);
 552                 sumtotal += pooltotal;
 553                 sumtotalt += pooltotalt;
 554                 sumtotalp += pooltotalp;
 555                 sumloaded += poolloaded;
 556                 sumloadedt += poolloadedt;
 557                 sumloadedp += poolloadedp;
 558         }
 559         if (printtotal)
 560                 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);
 561 }
 562
 563 static void R_TextureStats_f(void)
 564 {
 565         R_TextureStats_Print(true, true, true);
 566 }
 567
 568 static void r_textures_start(void)
 569 {
 570         // LordHavoc: allow any alignment
 571         CHECKGLERROR
 572         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
 573         qglPixelStorei(GL_PACK_ALIGNMENT, 1);CHECKGLERROR
 574
 575         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 576
 577         // Disable JPEG screenshots if the DLL isn't loaded
 578         if (! JPEG_OpenLibrary ())
 579                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 580         // TODO: support png screenshots?
 581         PNG_OpenLibrary ();
 582 }
 583
 584 static void r_textures_shutdown(void)
 585 {
 586         rtexturepool_t *temp;
 587
 588         JPEG_CloseLibrary ();
 589
 590         while(gltexturepoolchain)
 591         {
 592                 temp = (rtexturepool_t *) gltexturepoolchain;
 593                 R_FreeTexturePool(&temp);
 594         }
 595
 596         resizebuffersize = 0;
 597         texturebuffersize = 0;
 598         resizebuffer = NULL;
 599         colorconvertbuffer = NULL;
 600         texturebuffer = NULL;
 601         Mem_FreePool(&texturemempool);
 602 }
 603
 604 static void r_textures_newmap(void)
 605 {
 606 }
 607
 608 void R_Textures_Init (void)
 609 {
 610         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 611         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 612         Cvar_RegisterVariable (&gl_max_size);
 613         Cvar_RegisterVariable (&gl_picmip);
 614         Cvar_RegisterVariable (&r_lerpimages);
 615         Cvar_RegisterVariable (&r_precachetextures);
 616         Cvar_RegisterVariable (&gl_texture_anisotropy);
 617         Cvar_RegisterVariable (&gl_texturecompression);
 618         Cvar_RegisterVariable (&gl_texturecompression_color);
 619         Cvar_RegisterVariable (&gl_texturecompression_normal);
 620         Cvar_RegisterVariable (&gl_texturecompression_gloss);
 621         Cvar_RegisterVariable (&gl_texturecompression_glow);
 622         Cvar_RegisterVariable (&gl_texturecompression_2d);
 623         Cvar_RegisterVariable (&gl_texturecompression_q3bsplightmaps);
 624         Cvar_RegisterVariable (&gl_texturecompression_q3bspdeluxemaps);
 625         Cvar_RegisterVariable (&gl_texturecompression_sky);
 626         Cvar_RegisterVariable (&gl_texturecompression_lightcubemaps);
 627
 628         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 629 }
 630
 631 void R_Textures_Frame (void)
 632 {
 633         static int old_aniso = 0;
 634
 635         // could do procedural texture animation here, if we keep track of which
 636         // textures were accessed this frame...
 637
 638         // free the resize buffers
 639         resizebuffersize = 0;
 640         if (resizebuffer)
 641         {
 642                 Mem_Free(resizebuffer);
 643                 resizebuffer = NULL;
 644         }
 645         if (colorconvertbuffer)
 646         {
 647                 Mem_Free(colorconvertbuffer);
 648                 colorconvertbuffer = NULL;
 649         }
 650
 651         if (old_aniso != gl_texture_anisotropy.integer)
 652         {
 653                 gltexture_t *glt;
 654                 gltexturepool_t *pool;
 655                 GLint oldbindtexnum;
 656
 657                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 658
 659                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 660
 661                 CHECKGLERROR
 662                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 663                 {
 664                         for (glt = pool->gltchain;glt;glt = glt->chain)
 665                         {
 666                                 // only update already uploaded images
 667                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
 668                                 {
 669                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 670
 671                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 672                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 673
 674                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 675                                 }
 676                         }
 677                 }
 678         }
 679 }
 680
 681 void R_MakeResizeBufferBigger(int size)
 682 {
 683         if (resizebuffersize < size)
 684         {
 685                 resizebuffersize = size;
 686                 if (resizebuffer)
 687                         Mem_Free(resizebuffer);
 688                 if (colorconvertbuffer)
 689                         Mem_Free(colorconvertbuffer);
 690                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 691                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 692                 if (!resizebuffer || !colorconvertbuffer)
 693                         Host_Error("R_Upload: out of memory");
 694         }
 695 }
 696
 697 static void GL_SetupTextureParameters(int flags, int texturetype)
 698 {
 699         int textureenum = gltexturetypeenums[texturetype];
 700         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 701
 702         CHECKGLERROR
 703
 704         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 705         {
 706                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 707                 if (gl_texture_anisotropy.integer != aniso)
 708                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 709                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 710         }
 711         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 712         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 713         if (gltexturetypedimensions[texturetype] >= 3)
 714         {
 715                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 716         }
 717
 718         CHECKGLERROR
 719         if (flags & TEXF_FORCENEAREST)
 720         {
 721                 if (flags & TEXF_MIPMAP)
 722                 {
 723                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 724                 }
 725                 else
 726                 {
 727                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 728                 }
 729                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 730         }
 731         else if (flags & TEXF_FORCELINEAR)
 732         {
 733                 if (flags & TEXF_MIPMAP)
 734                 {
 735                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 736                         {
 737                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 738                         }
 739                         else
 740                         {
 741                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 742                         }
 743                 }
 744                 else
 745                 {
 746                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 747                 }
 748                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 749         }
 750         else
 751         {
 752                 if (flags & TEXF_MIPMAP)
 753                 {
 754                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 755                 }
 756                 else
 757                 {
 758                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 759                 }
 760                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 761         }
 762
 763         CHECKGLERROR
 764 }
 765
 766 static void R_Upload(gltexture_t *glt, const unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 767 {
 768         int i, mip, width, height, depth;
 769         GLint oldbindtexnum;
 770         const unsigned char *prevbuffer;
 771         prevbuffer = data;
 772
 773         CHECKGLERROR
 774
 775         // we need to restore the texture binding after finishing the upload
 776         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 777         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 778
 779         // these are rounded up versions of the size to do better resampling
 780         if (gl_support_arb_texture_non_power_of_two)
 781         {
 782                 width = glt->inputwidth;
 783                 height = glt->inputheight;
 784                 depth = glt->inputdepth;
 785         }
 786         else
 787         {
 788                 for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
 789                 for (height = 1;height < glt->inputheight;height <<= 1);
 790                 for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 791         }
 792
 793         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 794         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 795
 796         if (prevbuffer == NULL)
 797         {
 798                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
 799                 prevbuffer = resizebuffer;
 800         }
 801         else if (glt->textype->textype == TEXTYPE_PALETTE)
 802         {
 803                 // promote paletted to RGBA, so we only have to worry about RGB and
 804                 // RGBA in the rest of this code
 805                 Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
 806                 prevbuffer = colorconvertbuffer;
 807         }
 808
 809         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
 810         {
 811                 // update a portion of the image
 812                 switch(glt->texturetype)
 813                 {
 814                 case GLTEXTURETYPE_1D:
 815                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 816                         break;
 817                 case GLTEXTURETYPE_2D:
 818                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 819                         break;
 820                 case GLTEXTURETYPE_3D:
 821                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 822                         break;
 823                 default:
 824                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
 825                         break;
 826                 }
 827         }
 828         else
 829         {
 830                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
 831                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
 832
 833                 // upload the image for the first time
 834                 glt->flags &= ~GLTEXF_UPLOAD;
 835
 836                 // cubemaps contain multiple images and thus get processed a bit differently
 837                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
 838                 {
 839                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 840                         {
 841                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 842                                 prevbuffer = resizebuffer;
 843                         }
 844                         // picmip/max_size
 845                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 846                         {
 847                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 848                                 prevbuffer = resizebuffer;
 849                         }
 850                 }
 851                 mip = 0;
 852                 if (gl_support_texture_compression)
 853                 {
 854                         if (gl_texturecompression.integer >= 2)
 855                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
 856                         else
 857                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_FASTEST);
 858                         CHECKGLERROR
 859                 }
 860                 switch(glt->texturetype)
 861                 {
 862                 case GLTEXTURETYPE_1D:
 863                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 864                         if (glt->flags & TEXF_MIPMAP)
 865                         {
 866                                 while (width > 1 || height > 1 || depth > 1)
 867                                 {
 868                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 869                                         prevbuffer = resizebuffer;
 870                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 871                                 }
 872                         }
 873                         break;
 874                 case GLTEXTURETYPE_2D:
 875                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 876                         if (glt->flags & TEXF_MIPMAP)
 877                         {
 878                                 while (width > 1 || height > 1 || depth > 1)
 879                                 {
 880                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 881                                         prevbuffer = resizebuffer;
 882                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 883                                 }
 884                         }
 885                         break;
 886                 case GLTEXTURETYPE_3D:
 887                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 888                         if (glt->flags & TEXF_MIPMAP)
 889                         {
 890                                 while (width > 1 || height > 1 || depth > 1)
 891                                 {
 892                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 893                                         prevbuffer = resizebuffer;
 894                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 895                                 }
 896                         }
 897                         break;
 898                 case GLTEXTURETYPE_CUBEMAP:
 899                         // convert and upload each side in turn,
 900                         // from a continuous block of input texels
 901                         texturebuffer = prevbuffer;
 902                         for (i = 0;i < 6;i++)
 903                         {
 904                                 prevbuffer = texturebuffer;
 905                                 texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
 906                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 907                                 {
 908                                         Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 909                                         prevbuffer = resizebuffer;
 910                                 }
 911                                 // picmip/max_size
 912                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 913                                 {
 914                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 915                                         prevbuffer = resizebuffer;
 916                                 }
 917                                 mip = 0;
 918                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 919                                 if (glt->flags & TEXF_MIPMAP)
 920                                 {
 921                                         while (width > 1 || height > 1 || depth > 1)
 922                                         {
 923                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 924                                                 prevbuffer = resizebuffer;
 925                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 926                                         }
 927                                 }
 928                         }
 929                         break;
 930                 }
 931                 GL_SetupTextureParameters(glt->flags, glt->texturetype);
 932         }
 933         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 934 }
 935
 936 static void R_UploadTexture (gltexture_t *glt)
 937 {
 938         if (!(glt->flags & GLTEXF_UPLOAD))
 939                 return;
 940
 941         CHECKGLERROR
 942         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 943         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
 944         if (glt->inputtexels)
 945         {
 946                 Mem_Free(glt->inputtexels);
 947                 glt->inputtexels = NULL;
 948                 glt->flags |= GLTEXF_DESTROYED;
 949         }
 950         else if (glt->flags & GLTEXF_DESTROYED)
 951                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 952 }
 953
 954 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 unsigned char *data, const unsigned int *palette)
 955 {
 956         int i, size;
 957         gltexture_t *glt;
 958         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 959         textypeinfo_t *texinfo;
 960
 961         if (cls.state == ca_dedicated)
 962                 return NULL;
 963
 964         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 965         {
 966                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
 967                 return NULL;
 968         }
 969         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 970         {
 971                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
 972                 return NULL;
 973         }
 974
 975         texinfo = R_GetTexTypeInfo(textype, flags);
 976         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 977         if (size < 1)
 978         {
 979                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides, size);
 980                 return NULL;
 981         }
 982
 983         // clear the alpha flag if the texture has no transparent pixels
 984         switch(textype)
 985         {
 986         case TEXTYPE_PALETTE:
 987                 if (flags & TEXF_ALPHA)
 988                 {
 989                         flags &= ~TEXF_ALPHA;
 990                         if (data)
 991                         {
 992                                 for (i = 0;i < size;i++)
 993                                 {
 994                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
 995                                         {
 996                                                 flags |= TEXF_ALPHA;
 997                                                 break;
 998                                         }
 999                                 }
1000                         }
1001                 }
1002                 break;
1003         case TEXTYPE_RGBA:
1004         case TEXTYPE_BGRA:
1005                 if (flags & TEXF_ALPHA)
1006                 {
1007                         flags &= ~TEXF_ALPHA;
1008                         if (data)
1009                         {
1010                                 for (i = 3;i < size;i += 4)
1011                                 {
1012                                         if (data[i] < 255)
1013                                         {
1014                                                 flags |= TEXF_ALPHA;
1015                                                 break;
1016                                         }
1017                                 }
1018                         }
1019                 }
1020                 break;
1021         default:
1022                 Host_Error("R_LoadTexture: unknown texture type");
1023         }
1024
1025         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
1026         if (identifier)
1027                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1028         glt->pool = pool;
1029         glt->chain = pool->gltchain;
1030         pool->gltchain = glt;
1031         glt->inputwidth = width;
1032         glt->inputheight = height;
1033         glt->inputdepth = depth;
1034         glt->flags = flags | GLTEXF_UPLOAD;
1035         glt->textype = texinfo;
1036         glt->texturetype = texturetype;
1037         glt->inputdatasize = size;
1038         glt->palette = palette;
1039         glt->glinternalformat = texinfo->glinternalformat;
1040         glt->glformat = texinfo->glformat;
1041         glt->bytesperpixel = texinfo->internalbytesperpixel;
1042         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1043         glt->texnum = -1;
1044         // init the dynamic texture attributes, too [11/22/2007 Black]
1045         glt->dirtytexnum = 0;
1046         glt->updatecallback = NULL;
1047         glt->updatacallback_data = NULL;
1048
1049         if (data)
1050         {
1051                 glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
1052                 memcpy(glt->inputtexels, data, size);
1053         }
1054         else
1055                 glt->inputtexels = NULL;
1056
1057         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1058         R_PrecacheTexture(glt);
1059
1060         return (rtexture_t *)glt;
1061 }
1062
1063 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1064 {
1065         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1066 }
1067
1068 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1069 {
1070         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1071 }
1072
1073 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1074 {
1075         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1076 }
1077
1078 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1079 {
1080         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1081 }
1082
1083 int R_TextureHasAlpha(rtexture_t *rt)
1084 {
1085         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1086 }
1087
1088 int R_TextureWidth(rtexture_t *rt)
1089 {
1090         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
1091 }
1092
1093 int R_TextureHeight(rtexture_t *rt)
1094 {
1095         return rt ? ((gltexture_t *)rt)->inputheight : 0;
1096 }
1097
1098 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int width, int height)
1099 {
1100         gltexture_t *glt;
1101         if (rt == NULL)
1102                 Host_Error("R_UpdateTexture: no texture supplied");
1103         if (data == NULL)
1104                 Host_Error("R_UpdateTexture: no data supplied");
1105         glt = (gltexture_t *)rt;
1106
1107         // we need it to be uploaded before we can update a part of it
1108         if (glt->flags & GLTEXF_UPLOAD)
1109                 R_UploadTexture(glt);
1110
1111         // update part of the texture
1112         R_Upload(glt, data, x, y, 0, width, height, 1);
1113 }
1114