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", "0", "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", "0", "whether to compress 2d (hud/menu) textures other than the font"};
  18 cvar_t gl_texturecompression_q3bsplightmaps = {CVAR_SAVE, "gl_texturecompression_q3bsplightmaps", "0", "whether to compress lightmaps in q3bsp format levels"};
  19 cvar_t gl_texturecompression_q3bspdeluxemaps = {CVAR_SAVE, "gl_texturecompression_q3bspdeluxemaps", "0", "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         int gltype;
  48 }
  49 textypeinfo_t;
  50
  51 static textypeinfo_t textype_palette                = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_BGRA   , 3, GL_UNSIGNED_BYTE};
  52 static textypeinfo_t textype_palette_alpha          = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_BGRA   , 4, GL_UNSIGNED_BYTE};
  53 static textypeinfo_t textype_palette_compress       = {TEXTYPE_PALETTE, 1, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
  54 static textypeinfo_t textype_palette_alpha_compress = {TEXTYPE_PALETTE, 1, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
  55 static textypeinfo_t textype_rgba                   = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 3, GL_UNSIGNED_BYTE};
  56 static textypeinfo_t textype_rgba_alpha             = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 4, GL_UNSIGNED_BYTE};
  57 static textypeinfo_t textype_rgba_compress          = {TEXTYPE_RGBA   , 4, 4, 0.5f, GL_RGBA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
  58 static textypeinfo_t textype_rgba_alpha_compress    = {TEXTYPE_RGBA   , 4, 4, 1.0f, GL_RGBA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
  59 static textypeinfo_t textype_bgra                   = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 3, GL_UNSIGNED_BYTE};
  60 static textypeinfo_t textype_bgra_alpha             = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 4, GL_UNSIGNED_BYTE};
  61 static textypeinfo_t textype_bgra_compress          = {TEXTYPE_BGRA   , 4, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
  62 static textypeinfo_t textype_bgra_alpha_compress    = {TEXTYPE_BGRA   , 4, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
  63 static textypeinfo_t textype_shadowmap16            = {TEXTYPE_SHADOWMAP,2,2, 2.0f, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT16_ARB, GL_UNSIGNED_SHORT};
  64 static textypeinfo_t textype_shadowmap24            = {TEXTYPE_SHADOWMAP,4,4, 4.0f, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT24_ARB, GL_UNSIGNED_INT};
  65
  66 typedef enum gltexturetype_e
  67 {
  68         GLTEXTURETYPE_1D,
  69         GLTEXTURETYPE_2D,
  70         GLTEXTURETYPE_3D,
  71         GLTEXTURETYPE_CUBEMAP,
  72         GLTEXTURETYPE_RECTANGLE,
  73         GLTEXTURETYPE_TOTAL
  74 }
  75 gltexturetype_t;
  76
  77 static int gltexturetypeenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_RECTANGLE_ARB};
  78 static int gltexturetypebindingenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB, GL_TEXTURE_BINDING_RECTANGLE_ARB};
  79 static int gltexturetypedimensions[GLTEXTURETYPE_TOTAL] = {1, 2, 3, 2, 2};
  80 static int cubemapside[6] =
  81 {
  82         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  83         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  84         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  85         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  86         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  87         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  88 };
  89
  90 typedef struct gltexture_s
  91 {
  92         // this field is exposed to the R_GetTexture macro, for speed reasons
  93         // (must be identical in rtexture_t)
  94         int texnum; // GL texture slot number
  95
  96         // dynamic texture stuff [11/22/2007 Black]
  97         // used to hold the texture number of dirty textures
  98         int dirtytexnum;
  99         updatecallback_t updatecallback;
 100         void *updatacallback_data;
 101         // --- [11/22/2007 Black]
 102
 103         // pointer to texturepool (check this to see if the texture is allocated)
 104         struct gltexturepool_s *pool;
 105         // pointer to next texture in texturepool chain
 106         struct gltexture_s *chain;
 107         // name of the texture (this might be removed someday), no duplicates
 108         char identifier[MAX_QPATH + 32];
 109         // original data size in *inputtexels
 110         int inputwidth, inputheight, inputdepth;
 111         // copy of the original texture(s) supplied to the upload function, for
 112         // delayed uploads (non-precached)
 113         unsigned char *inputtexels;
 114         // original data size in *inputtexels
 115         int inputdatasize;
 116         // flags supplied to the LoadTexture function
 117         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 118         int flags;
 119         // pointer to one of the textype_ structs
 120         textypeinfo_t *textype;
 121         // one of the GLTEXTURETYPE_ values
 122         int texturetype;
 123         // palette if the texture is TEXTYPE_PALETTE
 124         const unsigned int *palette;
 125         // actual stored texture size after gl_picmip and gl_max_size are applied
 126         // (power of 2 if gl_support_arb_texture_non_power_of_two is not supported)
 127         int tilewidth, tileheight, tiledepth;
 128         // 1 or 6 depending on texturetype
 129         int sides;
 130         // bytes per pixel
 131         int bytesperpixel;
 132         // GL_RGB or GL_RGBA or GL_DEPTH_COMPONENT
 133         int glformat;
 134         // 3 or 4
 135         int glinternalformat;
 136         // GL_UNSIGNED_BYTE or GL_UNSIGNED_INT or GL_UNSIGNED_SHORT or GL_FLOAT
 137         int gltype;
 138 }
 139 gltexture_t;
 140
 141 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 142
 143 typedef struct gltexturepool_s
 144 {
 145         unsigned int sentinel;
 146         struct gltexture_s *gltchain;
 147         struct gltexturepool_s *next;
 148 }
 149 gltexturepool_t;
 150
 151 static gltexturepool_t *gltexturepoolchain = NULL;
 152
 153 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
 154 static int resizebuffersize = 0;
 155 static const unsigned char *texturebuffer;
 156 static int texturebuffersize = 0;
 157
 158 static textypeinfo_t *R_GetTexTypeInfo(textype_t textype, int flags)
 159 {
 160         if ((flags & TEXF_COMPRESS) && gl_texturecompression.integer >= 1 && gl_support_texture_compression)
 161         {
 162                 if (flags & TEXF_ALPHA)
 163                 {
 164                         switch(textype)
 165                         {
 166                         case TEXTYPE_PALETTE:
 167                                 return &textype_palette_alpha_compress;
 168                         case TEXTYPE_RGBA:
 169                                 return &textype_rgba_alpha_compress;
 170                         case TEXTYPE_BGRA:
 171                                 return &textype_bgra_alpha_compress;
 172                         default:
 173                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 174                                 return NULL;
 175                         }
 176                 }
 177                 else
 178                 {
 179                         switch(textype)
 180                         {
 181                         case TEXTYPE_PALETTE:
 182                                 return &textype_palette_compress;
 183                         case TEXTYPE_RGBA:
 184                                 return &textype_rgba_compress;
 185                         case TEXTYPE_BGRA:
 186                                 return &textype_bgra_compress;
 187                         default:
 188                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 189                                 return NULL;
 190                         }
 191                 }
 192         }
 193         else
 194         {
 195                 if (flags & TEXF_ALPHA)
 196                 {
 197                         switch(textype)
 198                         {
 199                         case TEXTYPE_PALETTE:
 200                                 return &textype_palette_alpha;
 201                         case TEXTYPE_RGBA:
 202                                 return &textype_rgba_alpha;
 203                         case TEXTYPE_BGRA:
 204                                 return &textype_bgra_alpha;
 205                         default:
 206                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 207                                 return NULL;
 208                         }
 209                 }
 210                 else
 211                 {
 212                         switch(textype)
 213                         {
 214                         case TEXTYPE_PALETTE:
 215                                 return &textype_palette;
 216                         case TEXTYPE_RGBA:
 217                                 return &textype_rgba;
 218                         case TEXTYPE_BGRA:
 219                                 return &textype_bgra;
 220                         case TEXTYPE_SHADOWMAP:
 221                                 return (flags & TEXF_LOWPRECISION) ? &textype_shadowmap16 : &textype_shadowmap24;
 222                         default:
 223                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 224                                 return NULL;
 225                         }
 226                 }
 227         }
 228         return NULL; // this line only to hush compiler warnings
 229 }
 230
 231 // dynamic texture code [11/22/2007 Black]
 232 void R_MarkDirtyTexture(rtexture_t *rt) {
 233         gltexture_t *glt = (gltexture_t*) rt;
 234         if( !glt ) {
 235                 return;
 236         }
 237
 238         // dont do anything if the texture is already dirty (and make sure this *is* a dynamic texture after all!)
 239         if( !glt->dirtytexnum && glt->flags & GLTEXF_DYNAMIC ) {
 240                 glt->dirtytexnum = glt->texnum;
 241                 // mark it as dirty, so R_RealGetTexture gets called
 242                 glt->texnum = 0;
 243         }
 244 }
 245
 246 void R_MakeTextureDynamic(rtexture_t *rt, updatecallback_t updatecallback, void *data) {
 247         gltexture_t *glt = (gltexture_t*) rt;
 248         if( !glt ) {
 249                 return;
 250         }
 251
 252         glt->flags |= GLTEXF_DYNAMIC;
 253         glt->updatecallback = updatecallback;
 254         glt->updatacallback_data = data;
 255         glt->dirtytexnum = 0;
 256 }
 257
 258 static void R_UpdateDynamicTexture(gltexture_t *glt) {
 259         glt->texnum = glt->dirtytexnum;
 260         // reset dirtytexnum again (not dirty anymore)
 261         glt->dirtytexnum = 0;
 262         // TODO: now assert that t->texnum != 0 ?
 263         if( glt->updatecallback ) {
 264                 glt->updatecallback( (rtexture_t*) glt, glt->updatacallback_data );
 265         }
 266 }
 267
 268 static void R_UploadTexture(gltexture_t *t);
 269
 270 static void R_PrecacheTexture(gltexture_t *glt)
 271 {
 272         int precache;
 273         precache = false;
 274         if (glt->flags & TEXF_ALWAYSPRECACHE)
 275                 precache = true;
 276         else if (r_precachetextures.integer >= 2)
 277                 precache = true;
 278         else if (r_precachetextures.integer >= 1)
 279                 if (glt->flags & TEXF_PRECACHE)
 280                         precache = true;
 281
 282         if (precache)
 283                 R_UploadTexture(glt);
 284 }
 285
 286 int R_RealGetTexture(rtexture_t *rt)
 287 {
 288         if (rt)
 289         {
 290                 gltexture_t *glt;
 291                 glt = (gltexture_t *)rt;
 292                 if (glt->flags & GLTEXF_DYNAMIC)
 293                         R_UpdateDynamicTexture(glt);
 294                 if (glt->flags & GLTEXF_UPLOAD)
 295                         R_UploadTexture(glt);
 296
 297                 return glt->texnum;
 298         }
 299         else
 300                 return 0;
 301 }
 302
 303 void R_PurgeTexture(rtexture_t *rt)
 304 {
 305         if(rt && !(((gltexture_t*) rt)->flags & TEXF_PERSISTENT)) {
 306                 R_FreeTexture(rt);
 307         }
 308 }
 309
 310 void R_FreeTexture(rtexture_t *rt)
 311 {
 312         gltexture_t *glt, **gltpointer;
 313
 314         glt = (gltexture_t *)rt;
 315         if (glt == NULL)
 316                 Host_Error("R_FreeTexture: texture == NULL");
 317
 318         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 319         if (*gltpointer == glt)
 320                 *gltpointer = glt->chain;
 321         else
 322                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 323
 324         if (!(glt->flags & GLTEXF_UPLOAD))
 325         {
 326                 CHECKGLERROR
 327                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 328         }
 329
 330         if (glt->inputtexels)
 331                 Mem_Free(glt->inputtexels);
 332         Mem_Free(glt);
 333 }
 334
 335 rtexturepool_t *R_AllocTexturePool(void)
 336 {
 337         gltexturepool_t *pool;
 338         if (texturemempool == NULL)
 339                 return NULL;
 340         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 341         if (pool == NULL)
 342                 return NULL;
 343         pool->next = gltexturepoolchain;
 344         gltexturepoolchain = pool;
 345         pool->sentinel = TEXTUREPOOL_SENTINEL;
 346         return (rtexturepool_t *)pool;
 347 }
 348
 349 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 350 {
 351         gltexturepool_t *pool, **poolpointer;
 352         if (rtexturepool == NULL)
 353                 return;
 354         if (*rtexturepool == NULL)
 355                 return;
 356         pool = (gltexturepool_t *)(*rtexturepool);
 357         *rtexturepool = NULL;
 358         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 359                 Host_Error("R_FreeTexturePool: pool already freed");
 360         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 361         if (*poolpointer == pool)
 362                 *poolpointer = pool->next;
 363         else
 364                 Host_Error("R_FreeTexturePool: pool not linked");
 365         while (pool->gltchain)
 366                 R_FreeTexture((rtexture_t *)pool->gltchain);
 367         Mem_Free(pool);
 368 }
 369
 370
 371 typedef struct glmode_s
 372 {
 373         char *name;
 374         int minification, magnification;
 375 }
 376 glmode_t;
 377
 378 static glmode_t modes[6] =
 379 {
 380         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 381         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 382         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 383         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 384         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 385         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 386 };
 387
 388 static void GL_TextureMode_f (void)
 389 {
 390         int i;
 391         GLint oldbindtexnum;
 392         gltexture_t *glt;
 393         gltexturepool_t *pool;
 394
 395         if (Cmd_Argc() == 1)
 396         {
 397                 for (i = 0;i < 6;i++)
 398                 {
 399                         if (gl_filter_min == modes[i].minification)
 400                         {
 401                                 Con_Printf("%s\n", modes[i].name);
 402                                 return;
 403                         }
 404                 }
 405                 Con_Print("current filter is unknown???\n");
 406                 return;
 407         }
 408
 409         for (i = 0;i < 6;i++)
 410                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 411                         break;
 412         if (i == 6)
 413         {
 414                 Con_Print("bad filter name\n");
 415                 return;
 416         }
 417
 418         gl_filter_min = modes[i].minification;
 419         gl_filter_mag = modes[i].magnification;
 420
 421         // change all the existing mipmap texture objects
 422         // FIXME: force renderer(/client/something?) restart instead?
 423         CHECKGLERROR
 424         for (pool = gltexturepoolchain;pool;pool = pool->next)
 425         {
 426                 for (glt = pool->gltchain;glt;glt = glt->chain)
 427                 {
 428                         // only update already uploaded images
 429                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 430                         {
 431                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 432                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 433                                 if (glt->flags & TEXF_MIPMAP)
 434                                 {
 435                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 436                                 }
 437                                 else
 438                                 {
 439                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 440                                 }
 441                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 442                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 443                         }
 444                 }
 445         }
 446 }
 447
 448 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 449 {
 450         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 451
 452         if (gl_max_size.integer > gl_max_texture_size)
 453                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 454
 455         switch (texturetype)
 456         {
 457         default:
 458         case GLTEXTURETYPE_1D:
 459         case GLTEXTURETYPE_2D:
 460                 maxsize = gl_max_texture_size;
 461                 break;
 462         case GLTEXTURETYPE_3D:
 463                 maxsize = gl_max_3d_texture_size;
 464                 break;
 465         case GLTEXTURETYPE_CUBEMAP:
 466                 maxsize = gl_max_cube_map_texture_size;
 467                 break;
 468         }
 469
 470         if (flags & TEXF_PICMIP)
 471         {
 472                 maxsize = min(maxsize, gl_max_size.integer);
 473                 picmip = gl_picmip.integer;
 474         }
 475
 476         if (outwidth)
 477         {
 478                 if (gl_support_arb_texture_non_power_of_two)
 479                         width2 = min(inwidth >> picmip, maxsize);
 480                 else
 481                 {
 482                         for (width2 = 1;width2 < inwidth;width2 <<= 1);
 483                         for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 484                 }
 485                 *outwidth = max(1, width2);
 486         }
 487         if (outheight)
 488         {
 489                 if (gl_support_arb_texture_non_power_of_two)
 490                         height2 = min(inheight >> picmip, maxsize);
 491                 else
 492                 {
 493                         for (height2 = 1;height2 < inheight;height2 <<= 1);
 494                         for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 495                 }
 496                 *outheight = max(1, height2);
 497         }
 498         if (outdepth)
 499         {
 500                 if (gl_support_arb_texture_non_power_of_two)
 501                         depth2 = min(indepth >> picmip, maxsize);
 502                 else
 503                 {
 504                         for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 505                         for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 506                 }
 507                 *outdepth = max(1, depth2);
 508         }
 509 }
 510
 511
 512 static int R_CalcTexelDataSize (gltexture_t *glt)
 513 {
 514         int width2, height2, depth2, size;
 515
 516         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
 517
 518         size = width2 * height2 * depth2;
 519
 520         if (glt->flags & TEXF_MIPMAP)
 521         {
 522                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 523                 {
 524                         if (width2 > 1)
 525                                 width2 >>= 1;
 526                         if (height2 > 1)
 527                                 height2 >>= 1;
 528                         if (depth2 > 1)
 529                                 depth2 >>= 1;
 530                         size += width2 * height2 * depth2;
 531                 }
 532         }
 533
 534         return (int)(size * glt->textype->glinternalbytesperpixel) * glt->sides;
 535 }
 536
 537 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 538 {
 539         int glsize;
 540         int isloaded;
 541         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 542         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 543         gltexture_t *glt;
 544         gltexturepool_t *pool;
 545         if (printeach)
 546                 Con_Print("glsize input loaded mip alpha name\n");
 547         for (pool = gltexturepoolchain;pool;pool = pool->next)
 548         {
 549                 pooltotal = 0;
 550                 pooltotalt = 0;
 551                 pooltotalp = 0;
 552                 poolloaded = 0;
 553                 poolloadedt = 0;
 554                 poolloadedp = 0;
 555                 for (glt = pool->gltchain;glt;glt = glt->chain)
 556                 {
 557                         glsize = R_CalcTexelDataSize(glt);
 558                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 559                         pooltotal++;
 560                         pooltotalt += glsize;
 561                         pooltotalp += glt->inputdatasize;
 562                         if (isloaded)
 563                         {
 564                                 poolloaded++;
 565                                 poolloadedt += glsize;
 566                                 poolloadedp += glt->inputdatasize;
 567                         }
 568                         if (printeach)
 569                                 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);
 570                 }
 571                 if (printpool)
 572                         Con_Printf("texturepool %10p total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", (void *)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);
 573                 sumtotal += pooltotal;
 574                 sumtotalt += pooltotalt;
 575                 sumtotalp += pooltotalp;
 576                 sumloaded += poolloaded;
 577                 sumloadedt += poolloadedt;
 578                 sumloadedp += poolloadedp;
 579         }
 580         if (printtotal)
 581                 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);
 582 }
 583
 584 static void R_TextureStats_f(void)
 585 {
 586         R_TextureStats_Print(true, true, true);
 587 }
 588
 589 static void r_textures_start(void)
 590 {
 591         // LordHavoc: allow any alignment
 592         CHECKGLERROR
 593         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
 594         qglPixelStorei(GL_PACK_ALIGNMENT, 1);CHECKGLERROR
 595
 596         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 597
 598         // Disable JPEG screenshots if the DLL isn't loaded
 599         if (! JPEG_OpenLibrary ())
 600                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 601         // TODO: support png screenshots?
 602         PNG_OpenLibrary ();
 603 }
 604
 605 static void r_textures_shutdown(void)
 606 {
 607         rtexturepool_t *temp;
 608
 609         JPEG_CloseLibrary ();
 610
 611         while(gltexturepoolchain)
 612         {
 613                 temp = (rtexturepool_t *) gltexturepoolchain;
 614                 R_FreeTexturePool(&temp);
 615         }
 616
 617         resizebuffersize = 0;
 618         texturebuffersize = 0;
 619         resizebuffer = NULL;
 620         colorconvertbuffer = NULL;
 621         texturebuffer = NULL;
 622         Mem_FreePool(&texturemempool);
 623 }
 624
 625 static void r_textures_newmap(void)
 626 {
 627 }
 628
 629 void R_Textures_Init (void)
 630 {
 631         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 632         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 633         Cvar_RegisterVariable (&gl_max_size);
 634         Cvar_RegisterVariable (&gl_picmip);
 635         Cvar_RegisterVariable (&r_lerpimages);
 636         Cvar_RegisterVariable (&r_precachetextures);
 637         Cvar_RegisterVariable (&gl_texture_anisotropy);
 638         Cvar_RegisterVariable (&gl_texturecompression);
 639         Cvar_RegisterVariable (&gl_texturecompression_color);
 640         Cvar_RegisterVariable (&gl_texturecompression_normal);
 641         Cvar_RegisterVariable (&gl_texturecompression_gloss);
 642         Cvar_RegisterVariable (&gl_texturecompression_glow);
 643         Cvar_RegisterVariable (&gl_texturecompression_2d);
 644         Cvar_RegisterVariable (&gl_texturecompression_q3bsplightmaps);
 645         Cvar_RegisterVariable (&gl_texturecompression_q3bspdeluxemaps);
 646         Cvar_RegisterVariable (&gl_texturecompression_sky);
 647         Cvar_RegisterVariable (&gl_texturecompression_lightcubemaps);
 648
 649         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 650 }
 651
 652 void R_Textures_Frame (void)
 653 {
 654         static int old_aniso = 0;
 655
 656         // could do procedural texture animation here, if we keep track of which
 657         // textures were accessed this frame...
 658
 659         // free the resize buffers
 660         resizebuffersize = 0;
 661         if (resizebuffer)
 662         {
 663                 Mem_Free(resizebuffer);
 664                 resizebuffer = NULL;
 665         }
 666         if (colorconvertbuffer)
 667         {
 668                 Mem_Free(colorconvertbuffer);
 669                 colorconvertbuffer = NULL;
 670         }
 671
 672         if (old_aniso != gl_texture_anisotropy.integer)
 673         {
 674                 gltexture_t *glt;
 675                 gltexturepool_t *pool;
 676                 GLint oldbindtexnum;
 677
 678                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 679
 680                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 681
 682                 CHECKGLERROR
 683                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 684                 {
 685                         for (glt = pool->gltchain;glt;glt = glt->chain)
 686                         {
 687                                 // only update already uploaded images
 688                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
 689                                 {
 690                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 691
 692                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 693                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 694
 695                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 696                                 }
 697                         }
 698                 }
 699         }
 700 }
 701
 702 void R_MakeResizeBufferBigger(int size)
 703 {
 704         if (resizebuffersize < size)
 705         {
 706                 resizebuffersize = size;
 707                 if (resizebuffer)
 708                         Mem_Free(resizebuffer);
 709                 if (colorconvertbuffer)
 710                         Mem_Free(colorconvertbuffer);
 711                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 712                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 713                 if (!resizebuffer || !colorconvertbuffer)
 714                         Host_Error("R_Upload: out of memory");
 715         }
 716 }
 717
 718 static void GL_SetupTextureParameters(int flags, textype_t textype, int texturetype)
 719 {
 720         int textureenum = gltexturetypeenums[texturetype];
 721         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 722
 723         CHECKGLERROR
 724
 725         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 726         {
 727                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 728                 if (gl_texture_anisotropy.integer != aniso)
 729                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 730                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 731         }
 732         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 733         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 734         if (gltexturetypedimensions[texturetype] >= 3)
 735         {
 736                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 737         }
 738
 739         CHECKGLERROR
 740         if (flags & TEXF_FORCENEAREST)
 741         {
 742                 if (flags & TEXF_MIPMAP)
 743                 {
 744                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 745                 }
 746                 else
 747                 {
 748                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 749                 }
 750                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 751         }
 752         else if (flags & TEXF_FORCELINEAR)
 753         {
 754                 if (flags & TEXF_MIPMAP)
 755                 {
 756                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 757                         {
 758                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 759                         }
 760                         else
 761                         {
 762                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 763                         }
 764                 }
 765                 else
 766                 {
 767                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 768                 }
 769                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 770         }
 771         else
 772         {
 773                 if (flags & TEXF_MIPMAP)
 774                 {
 775                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 776                 }
 777                 else
 778                 {
 779                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 780                 }
 781                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 782         }
 783
 784         if (textype == TEXTYPE_SHADOWMAP)
 785         {
 786                 if (gl_support_arb_shadow)
 787                 {
 788                         if (flags & TEXF_COMPARE)
 789                         {
 790                                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);CHECKGLERROR
 791                         }
 792                         else
 793                         {
 794                                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);CHECKGLERROR
 795                         }
 796                         qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);CHECKGLERROR
 797                 }
 798                 qglTexParameteri(textureenum, GL_DEPTH_TEXTURE_MODE_ARB, GL_LUMINANCE);CHECKGLERROR
 799         }
 800
 801         CHECKGLERROR
 802 }
 803
 804 static void R_Upload(gltexture_t *glt, const unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 805 {
 806         int i, mip, width, height, depth;
 807         GLint oldbindtexnum;
 808         const unsigned char *prevbuffer;
 809         prevbuffer = data;
 810
 811         CHECKGLERROR
 812
 813         // we need to restore the texture binding after finishing the upload
 814         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 815         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 816
 817         // these are rounded up versions of the size to do better resampling
 818         if (gl_support_arb_texture_non_power_of_two || glt->texturetype == GLTEXTURETYPE_RECTANGLE)
 819         {
 820                 width = glt->inputwidth;
 821                 height = glt->inputheight;
 822                 depth = glt->inputdepth;
 823         }
 824         else
 825         {
 826                 for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
 827                 for (height = 1;height < glt->inputheight;height <<= 1);
 828                 for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 829         }
 830
 831         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 832         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 833
 834         if (prevbuffer == NULL)
 835         {
 836                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
 837                 prevbuffer = resizebuffer;
 838         }
 839         else if (glt->textype->textype == TEXTYPE_PALETTE)
 840         {
 841                 // promote paletted to BGRA, so we only have to worry about BGRA in the rest of this code
 842                 Image_Copy8bitBGRA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
 843                 prevbuffer = colorconvertbuffer;
 844         }
 845
 846         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
 847         {
 848                 // update a portion of the image
 849                 switch(glt->texturetype)
 850                 {
 851                 case GLTEXTURETYPE_1D:
 852                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 853                         break;
 854                 case GLTEXTURETYPE_2D:
 855                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 856                         break;
 857                 case GLTEXTURETYPE_3D:
 858                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 859                         break;
 860                 default:
 861                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
 862                         break;
 863                 }
 864         }
 865         else
 866         {
 867                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
 868                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
 869
 870                 // upload the image for the first time
 871                 glt->flags &= ~GLTEXF_UPLOAD;
 872
 873                 // cubemaps contain multiple images and thus get processed a bit differently
 874                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
 875                 {
 876                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 877                         {
 878                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 879                                 prevbuffer = resizebuffer;
 880                         }
 881                         // picmip/max_size
 882                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 883                         {
 884                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 885                                 prevbuffer = resizebuffer;
 886                         }
 887                 }
 888                 mip = 0;
 889                 if (gl_support_texture_compression)
 890                 {
 891                         if (gl_texturecompression.integer >= 2)
 892                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
 893                         else
 894                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_FASTEST);
 895                         CHECKGLERROR
 896                 }
 897                 switch(glt->texturetype)
 898                 {
 899                 case GLTEXTURETYPE_1D:
 900                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 901                         if (glt->flags & TEXF_MIPMAP)
 902                         {
 903                                 while (width > 1 || height > 1 || depth > 1)
 904                                 {
 905                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 906                                         prevbuffer = resizebuffer;
 907                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 908                                 }
 909                         }
 910                         break;
 911                 case GLTEXTURETYPE_2D:
 912                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 913                         if (glt->flags & TEXF_MIPMAP)
 914                         {
 915                                 while (width > 1 || height > 1 || depth > 1)
 916                                 {
 917                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 918                                         prevbuffer = resizebuffer;
 919                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 920                                 }
 921                         }
 922                         break;
 923                 case GLTEXTURETYPE_3D:
 924                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 925                         if (glt->flags & TEXF_MIPMAP)
 926                         {
 927                                 while (width > 1 || height > 1 || depth > 1)
 928                                 {
 929                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 930                                         prevbuffer = resizebuffer;
 931                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 932                                 }
 933                         }
 934                         break;
 935                 case GLTEXTURETYPE_CUBEMAP:
 936                         // convert and upload each side in turn,
 937                         // from a continuous block of input texels
 938                         texturebuffer = (unsigned char *)prevbuffer;
 939                         for (i = 0;i < 6;i++)
 940                         {
 941                                 prevbuffer = texturebuffer;
 942                                 texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
 943                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 944                                 {
 945                                         Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 946                                         prevbuffer = resizebuffer;
 947                                 }
 948                                 // picmip/max_size
 949                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 950                                 {
 951                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 952                                         prevbuffer = resizebuffer;
 953                                 }
 954                                 mip = 0;
 955                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 956                                 if (glt->flags & TEXF_MIPMAP)
 957                                 {
 958                                         while (width > 1 || height > 1 || depth > 1)
 959                                         {
 960                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 961                                                 prevbuffer = resizebuffer;
 962                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 963                                         }
 964                                 }
 965                         }
 966                         break;
 967                 case GLTEXTURETYPE_RECTANGLE:
 968                         qglTexImage2D(GL_TEXTURE_RECTANGLE_ARB, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, NULL);CHECKGLERROR
 969                         break;
 970                 }
 971                 GL_SetupTextureParameters(glt->flags, glt->textype->textype, glt->texturetype);
 972         }
 973         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 974 }
 975
 976 static void R_UploadTexture (gltexture_t *glt)
 977 {
 978         if (!(glt->flags & GLTEXF_UPLOAD))
 979                 return;
 980
 981         CHECKGLERROR
 982         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 983         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
 984         if (glt->inputtexels)
 985         {
 986                 Mem_Free(glt->inputtexels);
 987                 glt->inputtexels = NULL;
 988                 glt->flags |= GLTEXF_DESTROYED;
 989         }
 990         else if (glt->flags & GLTEXF_DESTROYED)
 991                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 992 }
 993
 994 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)
 995 {
 996         int i, size;
 997         gltexture_t *glt;
 998         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 999         textypeinfo_t *texinfo;
1000
1001         if (cls.state == ca_dedicated)
1002                 return NULL;
1003
1004         if (texturetype == GLTEXTURETYPE_RECTANGLE && !gl_texturerectangle)
1005         {
1006                 Con_Printf ("R_LoadTexture: rectangle texture not supported by driver\n");
1007                 return NULL;
1008         }
1009         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
1010         {
1011                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
1012                 return NULL;
1013         }
1014         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
1015         {
1016                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
1017                 return NULL;
1018         }
1019
1020         texinfo = R_GetTexTypeInfo(textype, flags);
1021         size = width * height * depth * sides * texinfo->inputbytesperpixel;
1022         if (size < 1)
1023         {
1024                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides, size);
1025                 return NULL;
1026         }
1027
1028         // clear the alpha flag if the texture has no transparent pixels
1029         switch(textype)
1030         {
1031         case TEXTYPE_PALETTE:
1032                 if (flags & TEXF_ALPHA)
1033                 {
1034                         flags &= ~TEXF_ALPHA;
1035                         if (data)
1036                         {
1037                                 for (i = 0;i < size;i++)
1038                                 {
1039                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
1040                                         {
1041                                                 flags |= TEXF_ALPHA;
1042                                                 break;
1043                                         }
1044                                 }
1045                         }
1046                 }
1047                 break;
1048         case TEXTYPE_RGBA:
1049         case TEXTYPE_BGRA:
1050                 if (flags & TEXF_ALPHA)
1051                 {
1052                         flags &= ~TEXF_ALPHA;
1053                         if (data)
1054                         {
1055                                 for (i = 3;i < size;i += 4)
1056                                 {
1057                                         if (data[i] < 255)
1058                                         {
1059                                                 flags |= TEXF_ALPHA;
1060                                                 break;
1061                                         }
1062                                 }
1063                         }
1064                 }
1065                 break;
1066         case TEXTYPE_SHADOWMAP:
1067                 break;
1068         default:
1069                 Host_Error("R_LoadTexture: unknown texture type");
1070         }
1071
1072         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
1073         if (identifier)
1074                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1075         glt->pool = pool;
1076         glt->chain = pool->gltchain;
1077         pool->gltchain = glt;
1078         glt->inputwidth = width;
1079         glt->inputheight = height;
1080         glt->inputdepth = depth;
1081         glt->flags = flags | GLTEXF_UPLOAD;
1082         glt->textype = texinfo;
1083         glt->texturetype = texturetype;
1084         glt->inputdatasize = size;
1085         glt->palette = palette;
1086         glt->glinternalformat = texinfo->glinternalformat;
1087         glt->glformat = texinfo->glformat;
1088         glt->gltype = texinfo->gltype;
1089         glt->bytesperpixel = texinfo->internalbytesperpixel;
1090         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1091         glt->texnum = 0;
1092         // init the dynamic texture attributes, too [11/22/2007 Black]
1093         glt->dirtytexnum = 0;
1094         glt->updatecallback = NULL;
1095         glt->updatacallback_data = NULL;
1096
1097         if (data)
1098         {
1099                 glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
1100                 memcpy(glt->inputtexels, data, size);
1101         }
1102         else
1103                 glt->inputtexels = NULL;
1104
1105         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1106         R_PrecacheTexture(glt);
1107
1108         // texture converting and uploading can take a while, so make sure we're sending keepalives
1109         CL_KeepaliveMessage(false);
1110
1111         return (rtexture_t *)glt;
1112 }
1113
1114 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)
1115 {
1116         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1117 }
1118
1119 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)
1120 {
1121         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1122 }
1123
1124 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)
1125 {
1126         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1127 }
1128
1129 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)
1130 {
1131         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1132 }
1133
1134 static int R_ShadowMapTextureFlags(int precision, qboolean filter)
1135 {
1136         int flags = TEXF_ALWAYSPRECACHE | TEXF_CLAMP;
1137         if (filter)
1138                 flags |= TEXF_FORCELINEAR | TEXF_COMPARE;
1139         else
1140                 flags |= TEXF_FORCENEAREST;
1141         if (precision <= 16)
1142                 flags |= TEXF_LOWPRECISION;
1143         return flags;
1144 }
1145
1146 rtexture_t *R_LoadTextureShadowMapRectangle(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int precision, qboolean filter)
1147 {
1148         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_RECTANGLE, NULL, NULL);
1149 }
1150
1151 rtexture_t *R_LoadTextureShadowMap2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int precision, qboolean filter)
1152 {
1153         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_2D, NULL, NULL);
1154 }
1155
1156 rtexture_t *R_LoadTextureShadowMapCube(rtexturepool_t *rtexturepool, const char *identifier, int width, int precision, qboolean filter)
1157 {
1158     return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_CUBEMAP, NULL, NULL);
1159 }
1160
1161 int R_TextureHasAlpha(rtexture_t *rt)
1162 {
1163         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1164 }
1165
1166 int R_TextureWidth(rtexture_t *rt)
1167 {
1168         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
1169 }
1170
1171 int R_TextureHeight(rtexture_t *rt)
1172 {
1173         return rt ? ((gltexture_t *)rt)->inputheight : 0;
1174 }
1175
1176 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int width, int height)
1177 {
1178         gltexture_t *glt;
1179         if (rt == NULL)
1180                 Host_Error("R_UpdateTexture: no texture supplied");
1181         if (data == NULL)
1182                 Host_Error("R_UpdateTexture: no data supplied");
1183         glt = (gltexture_t *)rt;
1184
1185         // we need it to be uploaded before we can update a part of it
1186         if (glt->flags & GLTEXF_UPLOAD)
1187                 R_UploadTexture(glt);
1188
1189         // update part of the texture
1190         R_Upload(glt, data, x, y, 0, width, height, 1);
1191 }
1192
1193 void R_ClearTexture (rtexture_t *rt)
1194 {
1195         gltexture_t *glt = (gltexture_t *)rt;
1196
1197         R_Upload( glt, NULL, 0, 0, 0, glt->tilewidth, glt->tileheight, glt->tiledepth );
1198 }