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         textype_t 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_BGRA   , 3};
  51 static textypeinfo_t textype_palette_alpha          = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_BGRA   , 4};
  52 static textypeinfo_t textype_palette_compress       = {TEXTYPE_PALETTE, 1, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB};
  53 static textypeinfo_t textype_palette_alpha_compress = {TEXTYPE_PALETTE, 1, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB};
  54 static textypeinfo_t textype_rgba                   = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 3};
  55 static textypeinfo_t textype_rgba_alpha             = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 4};
  56 static textypeinfo_t textype_rgba_compress          = {TEXTYPE_RGBA   , 4, 4, 0.5f, GL_RGBA   , GL_COMPRESSED_RGB_ARB};
  57 static textypeinfo_t textype_rgba_alpha_compress    = {TEXTYPE_RGBA   , 4, 4, 1.0f, GL_RGBA   , GL_COMPRESSED_RGBA_ARB};
  58 static textypeinfo_t textype_bgra                   = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 3};
  59 static textypeinfo_t textype_bgra_alpha             = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 4};
  60 static textypeinfo_t textype_bgra_compress          = {TEXTYPE_BGRA   , 4, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_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 const unsigned char *texturebuffer;
 145 static int texturebuffersize = 0;
 146
 147 static textypeinfo_t *R_GetTexTypeInfo(textype_t 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 = -1;
 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         glt->dirtytexnum = 0;
 243 }
 244
 245 static void R_UpdateDynamicTexture(gltexture_t *glt) {
 246         glt->texnum = glt->dirtytexnum;
 247         // reset dirtytexnum again (not dirty anymore)
 248         glt->dirtytexnum = 0;
 249         // TODO: now assert that t->texnum != 0 ?
 250         if( glt->updatecallback ) {
 251                 glt->updatecallback( (rtexture_t*) glt, glt->updatacallback_data );
 252         }
 253 }
 254
 255 static void R_UploadTexture(gltexture_t *t);
 256
 257 static void R_PrecacheTexture(gltexture_t *glt)
 258 {
 259         int precache;
 260         precache = false;
 261         if (glt->flags & TEXF_ALWAYSPRECACHE)
 262                 precache = true;
 263         else if (r_precachetextures.integer >= 2)
 264                 precache = true;
 265         else if (r_precachetextures.integer >= 1)
 266                 if (glt->flags & TEXF_PRECACHE)
 267                         precache = true;
 268
 269         if (precache)
 270                 R_UploadTexture(glt);
 271 }
 272
 273 int R_RealGetTexture(rtexture_t *rt)
 274 {
 275         if (rt)
 276         {
 277                 gltexture_t *glt;
 278                 glt = (gltexture_t *)rt;
 279                 if (glt->flags & GLTEXF_DYNAMIC)
 280                         R_UpdateDynamicTexture(glt);
 281                 if (glt->flags & GLTEXF_UPLOAD)
 282                         R_UploadTexture(glt);
 283
 284                 return glt->texnum;
 285         }
 286         else
 287                 return 0;
 288 }
 289
 290 void R_PurgeTexture(rtexture_t *rt)
 291 {
 292         if(rt && !(((gltexture_t*) rt)->flags & TEXF_PERSISTENT)) {
 293                 R_FreeTexture(rt);
 294         }
 295 }
 296
 297 void R_FreeTexture(rtexture_t *rt)
 298 {
 299         gltexture_t *glt, **gltpointer;
 300
 301         glt = (gltexture_t *)rt;
 302         if (glt == NULL)
 303                 Host_Error("R_FreeTexture: texture == NULL");
 304
 305         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 306         if (*gltpointer == glt)
 307                 *gltpointer = glt->chain;
 308         else
 309                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 310
 311         if (glt->texnum)
 312         {
 313                 CHECKGLERROR
 314                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 315         }
 316
 317         if (glt->inputtexels)
 318                 Mem_Free(glt->inputtexels);
 319         Mem_Free(glt);
 320 }
 321
 322 rtexturepool_t *R_AllocTexturePool(void)
 323 {
 324         gltexturepool_t *pool;
 325         if (texturemempool == NULL)
 326                 return NULL;
 327         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 328         if (pool == NULL)
 329                 return NULL;
 330         pool->next = gltexturepoolchain;
 331         gltexturepoolchain = pool;
 332         pool->sentinel = TEXTUREPOOL_SENTINEL;
 333         return (rtexturepool_t *)pool;
 334 }
 335
 336 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 337 {
 338         gltexturepool_t *pool, **poolpointer;
 339         if (rtexturepool == NULL)
 340                 return;
 341         if (*rtexturepool == NULL)
 342                 return;
 343         pool = (gltexturepool_t *)(*rtexturepool);
 344         *rtexturepool = NULL;
 345         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 346                 Host_Error("R_FreeTexturePool: pool already freed");
 347         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 348         if (*poolpointer == pool)
 349                 *poolpointer = pool->next;
 350         else
 351                 Host_Error("R_FreeTexturePool: pool not linked");
 352         while (pool->gltchain)
 353                 R_FreeTexture((rtexture_t *)pool->gltchain);
 354         Mem_Free(pool);
 355 }
 356
 357
 358 typedef struct glmode_s
 359 {
 360         char *name;
 361         int minification, magnification;
 362 }
 363 glmode_t;
 364
 365 static glmode_t modes[6] =
 366 {
 367         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 368         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 369         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 370         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 371         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 372         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 373 };
 374
 375 static void GL_TextureMode_f (void)
 376 {
 377         int i;
 378         GLint oldbindtexnum;
 379         gltexture_t *glt;
 380         gltexturepool_t *pool;
 381
 382         if (Cmd_Argc() == 1)
 383         {
 384                 for (i = 0;i < 6;i++)
 385                 {
 386                         if (gl_filter_min == modes[i].minification)
 387                         {
 388                                 Con_Printf("%s\n", modes[i].name);
 389                                 return;
 390                         }
 391                 }
 392                 Con_Print("current filter is unknown???\n");
 393                 return;
 394         }
 395
 396         for (i = 0;i < 6;i++)
 397                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 398                         break;
 399         if (i == 6)
 400         {
 401                 Con_Print("bad filter name\n");
 402                 return;
 403         }
 404
 405         gl_filter_min = modes[i].minification;
 406         gl_filter_mag = modes[i].magnification;
 407
 408         // change all the existing mipmap texture objects
 409         // FIXME: force renderer(/client/something?) restart instead?
 410         CHECKGLERROR
 411         for (pool = gltexturepoolchain;pool;pool = pool->next)
 412         {
 413                 for (glt = pool->gltchain;glt;glt = glt->chain)
 414                 {
 415                         // only update already uploaded images
 416                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 417                         {
 418                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 419                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 420                                 if (glt->flags & TEXF_MIPMAP)
 421                                 {
 422                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 423                                 }
 424                                 else
 425                                 {
 426                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 427                                 }
 428                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 429                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 430                         }
 431                 }
 432         }
 433 }
 434
 435 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 436 {
 437         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 438
 439         if (gl_max_size.integer > gl_max_texture_size)
 440                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 441
 442         switch (texturetype)
 443         {
 444         default:
 445         case GLTEXTURETYPE_1D:
 446         case GLTEXTURETYPE_2D:
 447                 maxsize = gl_max_texture_size;
 448                 break;
 449         case GLTEXTURETYPE_3D:
 450                 maxsize = gl_max_3d_texture_size;
 451                 break;
 452         case GLTEXTURETYPE_CUBEMAP:
 453                 maxsize = gl_max_cube_map_texture_size;
 454                 break;
 455         }
 456
 457         if (flags & TEXF_PICMIP)
 458         {
 459                 maxsize = min(maxsize, gl_max_size.integer);
 460                 picmip = gl_picmip.integer;
 461         }
 462
 463         if (outwidth)
 464         {
 465                 if (gl_support_arb_texture_non_power_of_two)
 466                         width2 = min(inwidth >> picmip, maxsize);
 467                 else
 468                 {
 469                         for (width2 = 1;width2 < inwidth;width2 <<= 1);
 470                         for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 471                 }
 472                 *outwidth = max(1, width2);
 473         }
 474         if (outheight)
 475         {
 476                 if (gl_support_arb_texture_non_power_of_two)
 477                         height2 = min(inheight >> picmip, maxsize);
 478                 else
 479                 {
 480                         for (height2 = 1;height2 < inheight;height2 <<= 1);
 481                         for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 482                 }
 483                 *outheight = max(1, height2);
 484         }
 485         if (outdepth)
 486         {
 487                 if (gl_support_arb_texture_non_power_of_two)
 488                         depth2 = min(indepth >> picmip, maxsize);
 489                 else
 490                 {
 491                         for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 492                         for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 493                 }
 494                 *outdepth = max(1, depth2);
 495         }
 496 }
 497
 498
 499 static int R_CalcTexelDataSize (gltexture_t *glt)
 500 {
 501         int width2, height2, depth2, size;
 502
 503         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
 504
 505         size = width2 * height2 * depth2;
 506
 507         if (glt->flags & TEXF_MIPMAP)
 508         {
 509                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 510                 {
 511                         if (width2 > 1)
 512                                 width2 >>= 1;
 513                         if (height2 > 1)
 514                                 height2 >>= 1;
 515                         if (depth2 > 1)
 516                                 depth2 >>= 1;
 517                         size += width2 * height2 * depth2;
 518                 }
 519         }
 520
 521         return (int)(size * glt->textype->glinternalbytesperpixel) * glt->sides;
 522 }
 523
 524 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 525 {
 526         int glsize;
 527         int isloaded;
 528         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 529         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 530         gltexture_t *glt;
 531         gltexturepool_t *pool;
 532         if (printeach)
 533                 Con_Print("glsize input loaded mip alpha name\n");
 534         for (pool = gltexturepoolchain;pool;pool = pool->next)
 535         {
 536                 pooltotal = 0;
 537                 pooltotalt = 0;
 538                 pooltotalp = 0;
 539                 poolloaded = 0;
 540                 poolloadedt = 0;
 541                 poolloadedp = 0;
 542                 for (glt = pool->gltchain;glt;glt = glt->chain)
 543                 {
 544                         glsize = R_CalcTexelDataSize(glt);
 545                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 546                         pooltotal++;
 547                         pooltotalt += glsize;
 548                         pooltotalp += glt->inputdatasize;
 549                         if (isloaded)
 550                         {
 551                                 poolloaded++;
 552                                 poolloadedt += glsize;
 553                                 poolloadedp += glt->inputdatasize;
 554                         }
 555                         if (printeach)
 556                                 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);
 557                 }
 558                 if (printpool)
 559                         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);
 560                 sumtotal += pooltotal;
 561                 sumtotalt += pooltotalt;
 562                 sumtotalp += pooltotalp;
 563                 sumloaded += poolloaded;
 564                 sumloadedt += poolloadedt;
 565                 sumloadedp += poolloadedp;
 566         }
 567         if (printtotal)
 568                 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);
 569 }
 570
 571 static void R_TextureStats_f(void)
 572 {
 573         R_TextureStats_Print(true, true, true);
 574 }
 575
 576 static void r_textures_start(void)
 577 {
 578         // LordHavoc: allow any alignment
 579         CHECKGLERROR
 580         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
 581         qglPixelStorei(GL_PACK_ALIGNMENT, 1);CHECKGLERROR
 582
 583         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 584
 585         // Disable JPEG screenshots if the DLL isn't loaded
 586         if (! JPEG_OpenLibrary ())
 587                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 588         // TODO: support png screenshots?
 589         PNG_OpenLibrary ();
 590 }
 591
 592 static void r_textures_shutdown(void)
 593 {
 594         rtexturepool_t *temp;
 595
 596         JPEG_CloseLibrary ();
 597
 598         while(gltexturepoolchain)
 599         {
 600                 temp = (rtexturepool_t *) gltexturepoolchain;
 601                 R_FreeTexturePool(&temp);
 602         }
 603
 604         resizebuffersize = 0;
 605         texturebuffersize = 0;
 606         resizebuffer = NULL;
 607         colorconvertbuffer = NULL;
 608         texturebuffer = NULL;
 609         Mem_FreePool(&texturemempool);
 610 }
 611
 612 static void r_textures_newmap(void)
 613 {
 614 }
 615
 616 void R_Textures_Init (void)
 617 {
 618         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 619         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 620         Cvar_RegisterVariable (&gl_max_size);
 621         Cvar_RegisterVariable (&gl_picmip);
 622         Cvar_RegisterVariable (&r_lerpimages);
 623         Cvar_RegisterVariable (&r_precachetextures);
 624         Cvar_RegisterVariable (&gl_texture_anisotropy);
 625         Cvar_RegisterVariable (&gl_texturecompression);
 626         Cvar_RegisterVariable (&gl_texturecompression_color);
 627         Cvar_RegisterVariable (&gl_texturecompression_normal);
 628         Cvar_RegisterVariable (&gl_texturecompression_gloss);
 629         Cvar_RegisterVariable (&gl_texturecompression_glow);
 630         Cvar_RegisterVariable (&gl_texturecompression_2d);
 631         Cvar_RegisterVariable (&gl_texturecompression_q3bsplightmaps);
 632         Cvar_RegisterVariable (&gl_texturecompression_q3bspdeluxemaps);
 633         Cvar_RegisterVariable (&gl_texturecompression_sky);
 634         Cvar_RegisterVariable (&gl_texturecompression_lightcubemaps);
 635
 636         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 637 }
 638
 639 void R_Textures_Frame (void)
 640 {
 641         static int old_aniso = 0;
 642
 643         // could do procedural texture animation here, if we keep track of which
 644         // textures were accessed this frame...
 645
 646         // free the resize buffers
 647         resizebuffersize = 0;
 648         if (resizebuffer)
 649         {
 650                 Mem_Free(resizebuffer);
 651                 resizebuffer = NULL;
 652         }
 653         if (colorconvertbuffer)
 654         {
 655                 Mem_Free(colorconvertbuffer);
 656                 colorconvertbuffer = NULL;
 657         }
 658
 659         if (old_aniso != gl_texture_anisotropy.integer)
 660         {
 661                 gltexture_t *glt;
 662                 gltexturepool_t *pool;
 663                 GLint oldbindtexnum;
 664
 665                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 666
 667                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 668
 669                 CHECKGLERROR
 670                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 671                 {
 672                         for (glt = pool->gltchain;glt;glt = glt->chain)
 673                         {
 674                                 // only update already uploaded images
 675                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
 676                                 {
 677                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 678
 679                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 680                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 681
 682                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 683                                 }
 684                         }
 685                 }
 686         }
 687 }
 688
 689 void R_MakeResizeBufferBigger(int size)
 690 {
 691         if (resizebuffersize < size)
 692         {
 693                 resizebuffersize = size;
 694                 if (resizebuffer)
 695                         Mem_Free(resizebuffer);
 696                 if (colorconvertbuffer)
 697                         Mem_Free(colorconvertbuffer);
 698                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 699                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 700                 if (!resizebuffer || !colorconvertbuffer)
 701                         Host_Error("R_Upload: out of memory");
 702         }
 703 }
 704
 705 static void GL_SetupTextureParameters(int flags, int texturetype)
 706 {
 707         int textureenum = gltexturetypeenums[texturetype];
 708         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 709
 710         CHECKGLERROR
 711
 712         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 713         {
 714                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 715                 if (gl_texture_anisotropy.integer != aniso)
 716                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 717                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 718         }
 719         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 720         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 721         if (gltexturetypedimensions[texturetype] >= 3)
 722         {
 723                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 724         }
 725
 726         CHECKGLERROR
 727         if (flags & TEXF_FORCENEAREST)
 728         {
 729                 if (flags & TEXF_MIPMAP)
 730                 {
 731                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 732                 }
 733                 else
 734                 {
 735                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 736                 }
 737                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 738         }
 739         else if (flags & TEXF_FORCELINEAR)
 740         {
 741                 if (flags & TEXF_MIPMAP)
 742                 {
 743                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 744                         {
 745                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 746                         }
 747                         else
 748                         {
 749                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 750                         }
 751                 }
 752                 else
 753                 {
 754                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 755                 }
 756                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 757         }
 758         else
 759         {
 760                 if (flags & TEXF_MIPMAP)
 761                 {
 762                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 763                 }
 764                 else
 765                 {
 766                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 767                 }
 768                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 769         }
 770
 771         CHECKGLERROR
 772 }
 773
 774 static void R_Upload(gltexture_t *glt, const unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 775 {
 776         int i, mip, width, height, depth;
 777         GLint oldbindtexnum;
 778         const unsigned char *prevbuffer;
 779         prevbuffer = data;
 780
 781         CHECKGLERROR
 782
 783         // we need to restore the texture binding after finishing the upload
 784         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 785         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 786
 787         // these are rounded up versions of the size to do better resampling
 788         if (gl_support_arb_texture_non_power_of_two)
 789         {
 790                 width = glt->inputwidth;
 791                 height = glt->inputheight;
 792                 depth = glt->inputdepth;
 793         }
 794         else
 795         {
 796                 for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
 797                 for (height = 1;height < glt->inputheight;height <<= 1);
 798                 for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 799         }
 800
 801         if (prevbuffer != NULL)
 802         {
 803                 R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 804                 R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 805                 if (glt->textype->textype == TEXTYPE_PALETTE)
 806                 {
 807                         // promote paletted to BGRA, so we only have to worry about BGRA in the rest of this code
 808                         Image_Copy8bitBGRA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
 809                         prevbuffer = colorconvertbuffer;
 810                 }
 811         }
 812
 813         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
 814         {
 815                 // update a portion of the image
 816                 switch(glt->texturetype)
 817                 {
 818                 case GLTEXTURETYPE_1D:
 819                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 820                         break;
 821                 case GLTEXTURETYPE_2D:
 822                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 823                         break;
 824                 case GLTEXTURETYPE_3D:
 825                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 826                         break;
 827                 default:
 828                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
 829                         break;
 830                 }
 831         }
 832         else
 833         {
 834                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
 835                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
 836
 837                 // upload the image for the first time
 838                 glt->flags &= ~GLTEXF_UPLOAD;
 839
 840                 // cubemaps contain multiple images and thus get processed a bit differently
 841                 if ((prevbuffer != NULL) && (glt->texturetype != GLTEXTURETYPE_CUBEMAP))
 842                 {
 843                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 844                         {
 845                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 846                                 prevbuffer = resizebuffer;
 847                         }
 848                         // picmip/max_size
 849                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 850                         {
 851                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 852                                 prevbuffer = resizebuffer;
 853                         }
 854                 }
 855                 mip = 0;
 856                 if (gl_support_texture_compression)
 857                 {
 858                         if (gl_texturecompression.integer >= 2)
 859                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
 860                         else
 861                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_FASTEST);
 862                         CHECKGLERROR
 863                 }
 864                 switch(glt->texturetype)
 865                 {
 866                 case GLTEXTURETYPE_1D:
 867                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 868                         if (glt->flags & TEXF_MIPMAP)
 869                         {
 870                                 while (width > 1 || height > 1 || depth > 1)
 871                                 {
 872                                         if (prevbuffer != NULL)
 873                                         {
 874                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 875                                                 prevbuffer = resizebuffer;
 876                                         }
 877                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 878                                 }
 879                         }
 880                         break;
 881                 case GLTEXTURETYPE_2D:
 882                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 883                         if (glt->flags & TEXF_MIPMAP)
 884                         {
 885                                 while (width > 1 || height > 1 || depth > 1)
 886                                 {
 887                                         if (prevbuffer != NULL)
 888                                         {
 889                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 890                                                 prevbuffer = resizebuffer;
 891                                         }
 892                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 893                                 }
 894                         }
 895                         break;
 896                 case GLTEXTURETYPE_3D:
 897                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 898                         if (glt->flags & TEXF_MIPMAP)
 899                         {
 900                                 while (width > 1 || height > 1 || depth > 1)
 901                                 {
 902                                         if (prevbuffer != NULL)
 903                                         {
 904                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 905                                                 prevbuffer = resizebuffer;
 906                                         }
 907                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 908                                 }
 909                         }
 910                         break;
 911                 case GLTEXTURETYPE_CUBEMAP:
 912                         // convert and upload each side in turn,
 913                         // from a continuous block of input texels
 914                         texturebuffer = prevbuffer ? (unsigned char *)prevbuffer : NULL;
 915                         for (i = 0;i < 6;i++)
 916                         {
 917                                 prevbuffer = texturebuffer;
 918                                 if (prevbuffer != NULL)
 919                                 {
 920                                         texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
 921                                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 922                                         {
 923                                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 924                                                 prevbuffer = resizebuffer;
 925                                         }
 926                                         // picmip/max_size
 927                                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 928                                         {
 929                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 930                                                 prevbuffer = resizebuffer;
 931                                         }
 932                                 }
 933                                 mip = 0;
 934                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 935                                 if (glt->flags & TEXF_MIPMAP)
 936                                 {
 937                                         while (width > 1 || height > 1 || depth > 1)
 938                                         {
 939                                                 if (prevbuffer != NULL)
 940                                                 {
 941                                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 942                                                         prevbuffer = resizebuffer;
 943                                                 }
 944                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, GL_UNSIGNED_BYTE, prevbuffer);CHECKGLERROR
 945                                         }
 946                                 }
 947                         }
 948                         break;
 949                 }
 950                 GL_SetupTextureParameters(glt->flags, glt->texturetype);
 951         }
 952         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 953 }
 954
 955 static void R_UploadTexture (gltexture_t *glt)
 956 {
 957         if (!(glt->flags & GLTEXF_UPLOAD))
 958                 return;
 959
 960         CHECKGLERROR
 961         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 962         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
 963         if (glt->inputtexels)
 964         {
 965                 Mem_Free(glt->inputtexels);
 966                 glt->inputtexels = NULL;
 967                 glt->flags |= GLTEXF_DESTROYED;
 968         }
 969         else if (glt->flags & GLTEXF_DESTROYED)
 970                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 971 }
 972
 973 static rtexture_t *R_SetupTexture(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, int sides, int flags, textype_t textype, int texturetype, const unsigned char *data, const unsigned int *palette)
 974 {
 975         int i, size;
 976         gltexture_t *glt;
 977         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 978         textypeinfo_t *texinfo;
 979
 980         if (cls.state == ca_dedicated)
 981                 return NULL;
 982
 983         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 984         {
 985                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
 986                 return NULL;
 987         }
 988         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 989         {
 990                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
 991                 return NULL;
 992         }
 993
 994         texinfo = R_GetTexTypeInfo(textype, flags);
 995         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 996         if (size < 1)
 997         {
 998                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides, size);
 999                 return NULL;
1000         }
1001
1002         // clear the alpha flag if the texture has no transparent pixels
1003         switch(textype)
1004         {
1005         case TEXTYPE_PALETTE:
1006                 if (flags & TEXF_ALPHA)
1007                 {
1008                         flags &= ~TEXF_ALPHA;
1009                         if (data)
1010                         {
1011                                 for (i = 0;i < size;i++)
1012                                 {
1013                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
1014                                         {
1015                                                 flags |= TEXF_ALPHA;
1016                                                 break;
1017                                         }
1018                                 }
1019                         }
1020                 }
1021                 break;
1022         case TEXTYPE_RGBA:
1023         case TEXTYPE_BGRA:
1024                 if (flags & TEXF_ALPHA)
1025                 {
1026                         flags &= ~TEXF_ALPHA;
1027                         if (data)
1028                         {
1029                                 for (i = 3;i < size;i += 4)
1030                                 {
1031                                         if (data[i] < 255)
1032                                         {
1033                                                 flags |= TEXF_ALPHA;
1034                                                 break;
1035                                         }
1036                                 }
1037                         }
1038                 }
1039                 break;
1040         default:
1041                 Host_Error("R_LoadTexture: unknown texture type");
1042         }
1043
1044         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
1045         if (identifier)
1046                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1047         glt->pool = pool;
1048         glt->chain = pool->gltchain;
1049         pool->gltchain = glt;
1050         glt->inputwidth = width;
1051         glt->inputheight = height;
1052         glt->inputdepth = depth;
1053         glt->flags = flags | GLTEXF_UPLOAD;
1054         glt->textype = texinfo;
1055         glt->texturetype = texturetype;
1056         glt->inputdatasize = size;
1057         glt->palette = palette;
1058         glt->glinternalformat = texinfo->glinternalformat;
1059         glt->glformat = texinfo->glformat;
1060         glt->bytesperpixel = texinfo->internalbytesperpixel;
1061         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1062         glt->texnum = -1;
1063         // init the dynamic texture attributes, too [11/22/2007 Black]
1064         glt->dirtytexnum = 0;
1065         glt->updatecallback = NULL;
1066         glt->updatacallback_data = NULL;
1067
1068         if (data)
1069         {
1070                 glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
1071                 memcpy(glt->inputtexels, data, size);
1072         }
1073         else
1074                 glt->inputtexels = NULL;
1075
1076         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1077         R_PrecacheTexture(glt);
1078
1079         return (rtexture_t *)glt;
1080 }
1081
1082 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1083 {
1084         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1085 }
1086
1087 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1088 {
1089         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1090 }
1091
1092 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1093 {
1094         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1095 }
1096
1097 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1098 {
1099         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1100 }
1101
1102 int R_TextureHasAlpha(rtexture_t *rt)
1103 {
1104         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1105 }
1106
1107 int R_TextureWidth(rtexture_t *rt)
1108 {
1109         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
1110 }
1111
1112 int R_TextureHeight(rtexture_t *rt)
1113 {
1114         return rt ? ((gltexture_t *)rt)->inputheight : 0;
1115 }
1116
1117 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int width, int height)
1118 {
1119         gltexture_t *glt;
1120         if (rt == NULL)
1121                 Host_Error("R_UpdateTexture: no texture supplied");
1122         if (data == NULL)
1123                 Host_Error("R_UpdateTexture: no data supplied");
1124         glt = (gltexture_t *)rt;
1125
1126         // we need it to be uploaded before we can update a part of it
1127         if (glt->flags & GLTEXF_UPLOAD)
1128                 R_UploadTexture(glt);
1129
1130         // update part of the texture
1131         R_Upload(glt, data, x, y, 0, width, height, 1);
1132 }
1133
1134 void R_ClearTexture (rtexture_t *rt)
1135 {
1136         gltexture_t *glt = (gltexture_t *)rt;
1137
1138         R_Upload( glt, NULL, 0, 0, 0, glt->tilewidth, glt->tileheight, glt->tiledepth );
1139 }