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_2D,
  69         GLTEXTURETYPE_3D,
  70         GLTEXTURETYPE_CUBEMAP,
  71         GLTEXTURETYPE_RECTANGLE,
  72         GLTEXTURETYPE_TOTAL
  73 }
  74 gltexturetype_t;
  75
  76 static int gltexturetypeenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_RECTANGLE_ARB};
  77 static int gltexturetypebindingenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB, GL_TEXTURE_BINDING_RECTANGLE_ARB};
  78 static int gltexturetypedimensions[GLTEXTURETYPE_TOTAL] = {2, 3, 2, 2};
  79 static int cubemapside[6] =
  80 {
  81         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  82         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  83         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  84         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  85         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  86         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  87 };
  88
  89 typedef struct gltexture_s
  90 {
  91         // this field is exposed to the R_GetTexture macro, for speed reasons
  92         // (must be identical in rtexture_t)
  93         int texnum; // GL texture slot number
  94
  95         // dynamic texture stuff [11/22/2007 Black]
  96         // used to hold the texture number of dirty textures
  97         int dirtytexnum;
  98         updatecallback_t updatecallback;
  99         void *updatacallback_data;
 100         // --- [11/22/2007 Black]
 101
 102         // pointer to texturepool (check this to see if the texture is allocated)
 103         struct gltexturepool_s *pool;
 104         // pointer to next texture in texturepool chain
 105         struct gltexture_s *chain;
 106         // name of the texture (this might be removed someday), no duplicates
 107         char identifier[MAX_QPATH + 32];
 108         // original data size in *inputtexels
 109         int inputwidth, inputheight, inputdepth;
 110         // copy of the original texture(s) supplied to the upload function, for
 111         // delayed uploads (non-precached)
 112         unsigned char *inputtexels;
 113         // original data size in *inputtexels
 114         int inputdatasize;
 115         // flags supplied to the LoadTexture function
 116         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 117         int flags;
 118         // pointer to one of the textype_ structs
 119         textypeinfo_t *textype;
 120         // one of the GLTEXTURETYPE_ values
 121         int texturetype;
 122         // palette if the texture is TEXTYPE_PALETTE
 123         const unsigned int *palette;
 124         // actual stored texture size after gl_picmip and gl_max_size are applied
 125         // (power of 2 if gl_support_arb_texture_non_power_of_two is not supported)
 126         int tilewidth, tileheight, tiledepth;
 127         // 1 or 6 depending on texturetype
 128         int sides;
 129         // bytes per pixel
 130         int bytesperpixel;
 131         // GL_RGB or GL_RGBA or GL_DEPTH_COMPONENT
 132         int glformat;
 133         // 3 or 4
 134         int glinternalformat;
 135         // GL_UNSIGNED_BYTE or GL_UNSIGNED_INT or GL_UNSIGNED_SHORT or GL_FLOAT
 136         int gltype;
 137 }
 138 gltexture_t;
 139
 140 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 141
 142 typedef struct gltexturepool_s
 143 {
 144         unsigned int sentinel;
 145         struct gltexture_s *gltchain;
 146         struct gltexturepool_s *next;
 147 }
 148 gltexturepool_t;
 149
 150 static gltexturepool_t *gltexturepoolchain = NULL;
 151
 152 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
 153 static int resizebuffersize = 0;
 154 static const unsigned char *texturebuffer;
 155 static int texturebuffersize = 0;
 156
 157 static textypeinfo_t *R_GetTexTypeInfo(textype_t textype, int flags)
 158 {
 159         if ((flags & TEXF_COMPRESS) && gl_texturecompression.integer >= 1 && gl_support_texture_compression)
 160         {
 161                 if (flags & TEXF_ALPHA)
 162                 {
 163                         switch(textype)
 164                         {
 165                         case TEXTYPE_PALETTE:
 166                                 return &textype_palette_alpha_compress;
 167                         case TEXTYPE_RGBA:
 168                                 return &textype_rgba_alpha_compress;
 169                         case TEXTYPE_BGRA:
 170                                 return &textype_bgra_alpha_compress;
 171                         default:
 172                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 173                                 return NULL;
 174                         }
 175                 }
 176                 else
 177                 {
 178                         switch(textype)
 179                         {
 180                         case TEXTYPE_PALETTE:
 181                                 return &textype_palette_compress;
 182                         case TEXTYPE_RGBA:
 183                                 return &textype_rgba_compress;
 184                         case TEXTYPE_BGRA:
 185                                 return &textype_bgra_compress;
 186                         default:
 187                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 188                                 return NULL;
 189                         }
 190                 }
 191         }
 192         else
 193         {
 194                 if (flags & TEXF_ALPHA)
 195                 {
 196                         switch(textype)
 197                         {
 198                         case TEXTYPE_PALETTE:
 199                                 return &textype_palette_alpha;
 200                         case TEXTYPE_RGBA:
 201                                 return &textype_rgba_alpha;
 202                         case TEXTYPE_BGRA:
 203                                 return &textype_bgra_alpha;
 204                         default:
 205                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 206                                 return NULL;
 207                         }
 208                 }
 209                 else
 210                 {
 211                         switch(textype)
 212                         {
 213                         case TEXTYPE_PALETTE:
 214                                 return &textype_palette;
 215                         case TEXTYPE_RGBA:
 216                                 return &textype_rgba;
 217                         case TEXTYPE_BGRA:
 218                                 return &textype_bgra;
 219                         case TEXTYPE_SHADOWMAP:
 220                                 return (flags & TEXF_LOWPRECISION) ? &textype_shadowmap16 : &textype_shadowmap24;
 221                         default:
 222                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 223                                 return NULL;
 224                         }
 225                 }
 226         }
 227         return NULL; // this line only to hush compiler warnings
 228 }
 229
 230 // dynamic texture code [11/22/2007 Black]
 231 void R_MarkDirtyTexture(rtexture_t *rt) {
 232         gltexture_t *glt = (gltexture_t*) rt;
 233         if( !glt ) {
 234                 return;
 235         }
 236
 237         // dont do anything if the texture is already dirty (and make sure this *is* a dynamic texture after all!)
 238         if( !glt->dirtytexnum && glt->flags & GLTEXF_DYNAMIC ) {
 239                 glt->dirtytexnum = glt->texnum;
 240                 // mark it as dirty, so R_RealGetTexture gets called
 241                 glt->texnum = 0;
 242         }
 243 }
 244
 245 void R_MakeTextureDynamic(rtexture_t *rt, updatecallback_t updatecallback, void *data) {
 246         gltexture_t *glt = (gltexture_t*) rt;
 247         if( !glt ) {
 248                 return;
 249         }
 250
 251         glt->flags |= GLTEXF_DYNAMIC;
 252         glt->updatecallback = updatecallback;
 253         glt->updatacallback_data = data;
 254         glt->dirtytexnum = 0;
 255 }
 256
 257 static void R_UpdateDynamicTexture(gltexture_t *glt) {
 258         glt->texnum = glt->dirtytexnum;
 259         // reset dirtytexnum again (not dirty anymore)
 260         glt->dirtytexnum = 0;
 261         // TODO: now assert that t->texnum != 0 ?
 262         if( glt->updatecallback ) {
 263                 glt->updatecallback( (rtexture_t*) glt, glt->updatacallback_data );
 264         }
 265 }
 266
 267 void R_PurgeTexture(rtexture_t *rt)
 268 {
 269         if(rt && !(((gltexture_t*) rt)->flags & TEXF_PERSISTENT)) {
 270                 R_FreeTexture(rt);
 271         }
 272 }
 273
 274 void R_FreeTexture(rtexture_t *rt)
 275 {
 276         gltexture_t *glt, **gltpointer;
 277
 278         glt = (gltexture_t *)rt;
 279         if (glt == NULL)
 280                 Host_Error("R_FreeTexture: texture == NULL");
 281
 282         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 283         if (*gltpointer == glt)
 284                 *gltpointer = glt->chain;
 285         else
 286                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 287
 288         if (!(glt->flags & GLTEXF_UPLOAD))
 289         {
 290                 CHECKGLERROR
 291                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 292         }
 293
 294         if (glt->inputtexels)
 295                 Mem_Free(glt->inputtexels);
 296         Mem_Free(glt);
 297 }
 298
 299 rtexturepool_t *R_AllocTexturePool(void)
 300 {
 301         gltexturepool_t *pool;
 302         if (texturemempool == NULL)
 303                 return NULL;
 304         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 305         if (pool == NULL)
 306                 return NULL;
 307         pool->next = gltexturepoolchain;
 308         gltexturepoolchain = pool;
 309         pool->sentinel = TEXTUREPOOL_SENTINEL;
 310         return (rtexturepool_t *)pool;
 311 }
 312
 313 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 314 {
 315         gltexturepool_t *pool, **poolpointer;
 316         if (rtexturepool == NULL)
 317                 return;
 318         if (*rtexturepool == NULL)
 319                 return;
 320         pool = (gltexturepool_t *)(*rtexturepool);
 321         *rtexturepool = NULL;
 322         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 323                 Host_Error("R_FreeTexturePool: pool already freed");
 324         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 325         if (*poolpointer == pool)
 326                 *poolpointer = pool->next;
 327         else
 328                 Host_Error("R_FreeTexturePool: pool not linked");
 329         while (pool->gltchain)
 330                 R_FreeTexture((rtexture_t *)pool->gltchain);
 331         Mem_Free(pool);
 332 }
 333
 334
 335 typedef struct glmode_s
 336 {
 337         char *name;
 338         int minification, magnification;
 339 }
 340 glmode_t;
 341
 342 static glmode_t modes[6] =
 343 {
 344         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 345         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 346         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 347         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 348         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 349         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 350 };
 351
 352 static void GL_TextureMode_f (void)
 353 {
 354         int i;
 355         GLint oldbindtexnum;
 356         gltexture_t *glt;
 357         gltexturepool_t *pool;
 358
 359         if (Cmd_Argc() == 1)
 360         {
 361                 for (i = 0;i < 6;i++)
 362                 {
 363                         if (gl_filter_min == modes[i].minification)
 364                         {
 365                                 Con_Printf("%s\n", modes[i].name);
 366                                 return;
 367                         }
 368                 }
 369                 Con_Print("current filter is unknown???\n");
 370                 return;
 371         }
 372
 373         for (i = 0;i < 6;i++)
 374                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 375                         break;
 376         if (i == 6)
 377         {
 378                 Con_Print("bad filter name\n");
 379                 return;
 380         }
 381
 382         gl_filter_min = modes[i].minification;
 383         gl_filter_mag = modes[i].magnification;
 384
 385         // change all the existing mipmap texture objects
 386         // FIXME: force renderer(/client/something?) restart instead?
 387         CHECKGLERROR
 388         for (pool = gltexturepoolchain;pool;pool = pool->next)
 389         {
 390                 for (glt = pool->gltchain;glt;glt = glt->chain)
 391                 {
 392                         // only update already uploaded images
 393                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 394                         {
 395                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 396                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 397                                 if (glt->flags & TEXF_MIPMAP)
 398                                 {
 399                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 400                                 }
 401                                 else
 402                                 {
 403                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 404                                 }
 405                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 406                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 407                         }
 408                 }
 409         }
 410 }
 411
 412 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 413 {
 414         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 415
 416         if (gl_max_size.integer > gl_max_texture_size)
 417                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 418
 419         switch (texturetype)
 420         {
 421         default:
 422         case GLTEXTURETYPE_2D:
 423                 maxsize = gl_max_texture_size;
 424                 break;
 425         case GLTEXTURETYPE_3D:
 426                 maxsize = gl_max_3d_texture_size;
 427                 break;
 428         case GLTEXTURETYPE_CUBEMAP:
 429                 maxsize = gl_max_cube_map_texture_size;
 430                 break;
 431         }
 432
 433         if (flags & TEXF_PICMIP)
 434         {
 435                 maxsize = min(maxsize, gl_max_size.integer);
 436                 picmip = gl_picmip.integer;
 437         }
 438
 439         if (outwidth)
 440         {
 441                 if (gl_support_arb_texture_non_power_of_two)
 442                         width2 = min(inwidth >> picmip, maxsize);
 443                 else
 444                 {
 445                         for (width2 = 1;width2 < inwidth;width2 <<= 1);
 446                         for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 447                 }
 448                 *outwidth = max(1, width2);
 449         }
 450         if (outheight)
 451         {
 452                 if (gl_support_arb_texture_non_power_of_two)
 453                         height2 = min(inheight >> picmip, maxsize);
 454                 else
 455                 {
 456                         for (height2 = 1;height2 < inheight;height2 <<= 1);
 457                         for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 458                 }
 459                 *outheight = max(1, height2);
 460         }
 461         if (outdepth)
 462         {
 463                 if (gl_support_arb_texture_non_power_of_two)
 464                         depth2 = min(indepth >> picmip, maxsize);
 465                 else
 466                 {
 467                         for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 468                         for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 469                 }
 470                 *outdepth = max(1, depth2);
 471         }
 472 }
 473
 474
 475 static int R_CalcTexelDataSize (gltexture_t *glt)
 476 {
 477         int width2, height2, depth2, size;
 478
 479         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
 480
 481         size = width2 * height2 * depth2;
 482
 483         if (glt->flags & TEXF_MIPMAP)
 484         {
 485                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 486                 {
 487                         if (width2 > 1)
 488                                 width2 >>= 1;
 489                         if (height2 > 1)
 490                                 height2 >>= 1;
 491                         if (depth2 > 1)
 492                                 depth2 >>= 1;
 493                         size += width2 * height2 * depth2;
 494                 }
 495         }
 496
 497         return (int)(size * glt->textype->glinternalbytesperpixel) * glt->sides;
 498 }
 499
 500 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 501 {
 502         int glsize;
 503         int isloaded;
 504         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 505         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 506         gltexture_t *glt;
 507         gltexturepool_t *pool;
 508         if (printeach)
 509                 Con_Print("glsize input loaded mip alpha name\n");
 510         for (pool = gltexturepoolchain;pool;pool = pool->next)
 511         {
 512                 pooltotal = 0;
 513                 pooltotalt = 0;
 514                 pooltotalp = 0;
 515                 poolloaded = 0;
 516                 poolloadedt = 0;
 517                 poolloadedp = 0;
 518                 for (glt = pool->gltchain;glt;glt = glt->chain)
 519                 {
 520                         glsize = R_CalcTexelDataSize(glt);
 521                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 522                         pooltotal++;
 523                         pooltotalt += glsize;
 524                         pooltotalp += glt->inputdatasize;
 525                         if (isloaded)
 526                         {
 527                                 poolloaded++;
 528                                 poolloadedt += glsize;
 529                                 poolloadedp += glt->inputdatasize;
 530                         }
 531                         if (printeach)
 532                                 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);
 533                 }
 534                 if (printpool)
 535                         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);
 536                 sumtotal += pooltotal;
 537                 sumtotalt += pooltotalt;
 538                 sumtotalp += pooltotalp;
 539                 sumloaded += poolloaded;
 540                 sumloadedt += poolloadedt;
 541                 sumloadedp += poolloadedp;
 542         }
 543         if (printtotal)
 544                 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);
 545 }
 546
 547 static void R_TextureStats_f(void)
 548 {
 549         R_TextureStats_Print(true, true, true);
 550 }
 551
 552 static void r_textures_start(void)
 553 {
 554         // LordHavoc: allow any alignment
 555         CHECKGLERROR
 556         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
 557         qglPixelStorei(GL_PACK_ALIGNMENT, 1);CHECKGLERROR
 558
 559         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 560
 561         // Disable JPEG screenshots if the DLL isn't loaded
 562         if (! JPEG_OpenLibrary ())
 563                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 564         // TODO: support png screenshots?
 565         PNG_OpenLibrary ();
 566 }
 567
 568 static void r_textures_shutdown(void)
 569 {
 570         rtexturepool_t *temp;
 571
 572         JPEG_CloseLibrary ();
 573
 574         while(gltexturepoolchain)
 575         {
 576                 temp = (rtexturepool_t *) gltexturepoolchain;
 577                 R_FreeTexturePool(&temp);
 578         }
 579
 580         resizebuffersize = 0;
 581         texturebuffersize = 0;
 582         resizebuffer = NULL;
 583         colorconvertbuffer = NULL;
 584         texturebuffer = NULL;
 585         Mem_FreePool(&texturemempool);
 586 }
 587
 588 static void r_textures_newmap(void)
 589 {
 590 }
 591
 592 void R_Textures_Init (void)
 593 {
 594         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 595         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 596         Cvar_RegisterVariable (&gl_max_size);
 597         Cvar_RegisterVariable (&gl_picmip);
 598         Cvar_RegisterVariable (&r_lerpimages);
 599         Cvar_RegisterVariable (&r_precachetextures);
 600         Cvar_RegisterVariable (&gl_texture_anisotropy);
 601         Cvar_RegisterVariable (&gl_texturecompression);
 602         Cvar_RegisterVariable (&gl_texturecompression_color);
 603         Cvar_RegisterVariable (&gl_texturecompression_normal);
 604         Cvar_RegisterVariable (&gl_texturecompression_gloss);
 605         Cvar_RegisterVariable (&gl_texturecompression_glow);
 606         Cvar_RegisterVariable (&gl_texturecompression_2d);
 607         Cvar_RegisterVariable (&gl_texturecompression_q3bsplightmaps);
 608         Cvar_RegisterVariable (&gl_texturecompression_q3bspdeluxemaps);
 609         Cvar_RegisterVariable (&gl_texturecompression_sky);
 610         Cvar_RegisterVariable (&gl_texturecompression_lightcubemaps);
 611
 612         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 613 }
 614
 615 void R_Textures_Frame (void)
 616 {
 617         static int old_aniso = 0;
 618
 619         // could do procedural texture animation here, if we keep track of which
 620         // textures were accessed this frame...
 621
 622         // free the resize buffers
 623         resizebuffersize = 0;
 624         if (resizebuffer)
 625         {
 626                 Mem_Free(resizebuffer);
 627                 resizebuffer = NULL;
 628         }
 629         if (colorconvertbuffer)
 630         {
 631                 Mem_Free(colorconvertbuffer);
 632                 colorconvertbuffer = NULL;
 633         }
 634
 635         if (old_aniso != gl_texture_anisotropy.integer)
 636         {
 637                 gltexture_t *glt;
 638                 gltexturepool_t *pool;
 639                 GLint oldbindtexnum;
 640
 641                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 642
 643                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 644
 645                 CHECKGLERROR
 646                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 647                 {
 648                         for (glt = pool->gltchain;glt;glt = glt->chain)
 649                         {
 650                                 // only update already uploaded images
 651                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
 652                                 {
 653                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 654
 655                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 656                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 657
 658                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 659                                 }
 660                         }
 661                 }
 662         }
 663 }
 664
 665 void R_MakeResizeBufferBigger(int size)
 666 {
 667         if (resizebuffersize < size)
 668         {
 669                 resizebuffersize = size;
 670                 if (resizebuffer)
 671                         Mem_Free(resizebuffer);
 672                 if (colorconvertbuffer)
 673                         Mem_Free(colorconvertbuffer);
 674                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 675                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 676                 if (!resizebuffer || !colorconvertbuffer)
 677                         Host_Error("R_Upload: out of memory");
 678         }
 679 }
 680
 681 static void GL_SetupTextureParameters(int flags, textype_t textype, int texturetype)
 682 {
 683         int textureenum = gltexturetypeenums[texturetype];
 684         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 685
 686         CHECKGLERROR
 687
 688         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 689         {
 690                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 691                 if (gl_texture_anisotropy.integer != aniso)
 692                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 693                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 694         }
 695         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 696         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 697         if (gltexturetypedimensions[texturetype] >= 3)
 698         {
 699                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 700         }
 701
 702         CHECKGLERROR
 703         if (flags & TEXF_FORCENEAREST)
 704         {
 705                 if (flags & TEXF_MIPMAP)
 706                 {
 707                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 708                 }
 709                 else
 710                 {
 711                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 712                 }
 713                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 714         }
 715         else if (flags & TEXF_FORCELINEAR)
 716         {
 717                 if (flags & TEXF_MIPMAP)
 718                 {
 719                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 720                         {
 721                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 722                         }
 723                         else
 724                         {
 725                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 726                         }
 727                 }
 728                 else
 729                 {
 730                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 731                 }
 732                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 733         }
 734         else
 735         {
 736                 if (flags & TEXF_MIPMAP)
 737                 {
 738                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 739                 }
 740                 else
 741                 {
 742                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 743                 }
 744                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 745         }
 746
 747         if (textype == TEXTYPE_SHADOWMAP)
 748         {
 749                 if (gl_support_arb_shadow)
 750                 {
 751                         if (flags & TEXF_COMPARE)
 752                         {
 753                                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);CHECKGLERROR
 754                         }
 755                         else
 756                         {
 757                                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);CHECKGLERROR
 758                         }
 759                         qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);CHECKGLERROR
 760                 }
 761                 qglTexParameteri(textureenum, GL_DEPTH_TEXTURE_MODE_ARB, GL_LUMINANCE);CHECKGLERROR
 762         }
 763
 764         CHECKGLERROR
 765 }
 766
 767 static void R_Upload(gltexture_t *glt, const unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 768 {
 769         int i, mip, width, height, depth;
 770         GLint oldbindtexnum;
 771         const unsigned char *prevbuffer;
 772         prevbuffer = data;
 773
 774         CHECKGLERROR
 775
 776         // we need to restore the texture binding after finishing the upload
 777         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 778         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 779
 780         // these are rounded up versions of the size to do better resampling
 781         if (gl_support_arb_texture_non_power_of_two || glt->texturetype == GLTEXTURETYPE_RECTANGLE)
 782         {
 783                 width = glt->inputwidth;
 784                 height = glt->inputheight;
 785                 depth = glt->inputdepth;
 786         }
 787         else
 788         {
 789                 for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
 790                 for (height = 1;height < glt->inputheight;height <<= 1);
 791                 for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 792         }
 793
 794         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 795         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 796
 797         if (prevbuffer == NULL)
 798         {
 799                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
 800                 prevbuffer = resizebuffer;
 801         }
 802         else if (glt->textype->textype == TEXTYPE_PALETTE)
 803         {
 804                 // promote paletted to BGRA, so we only have to worry about BGRA in the rest of this code
 805                 Image_Copy8bitBGRA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
 806                 prevbuffer = colorconvertbuffer;
 807         }
 808
 809         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
 810         {
 811                 // update a portion of the image
 812                 switch(glt->texturetype)
 813                 {
 814                 case GLTEXTURETYPE_2D:
 815                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 816                         break;
 817                 case GLTEXTURETYPE_3D:
 818                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 819                         break;
 820                 default:
 821                         Host_Error("R_Upload: partial update of type other than 2D");
 822                         break;
 823                 }
 824         }
 825         else
 826         {
 827                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
 828                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
 829
 830                 // upload the image for the first time
 831                 glt->flags &= ~GLTEXF_UPLOAD;
 832
 833                 // cubemaps contain multiple images and thus get processed a bit differently
 834                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
 835                 {
 836                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 837                         {
 838                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 839                                 prevbuffer = resizebuffer;
 840                         }
 841                         // picmip/max_size
 842                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 843                         {
 844                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 845                                 prevbuffer = resizebuffer;
 846                         }
 847                 }
 848                 mip = 0;
 849                 if (gl_support_texture_compression)
 850                 {
 851                         if (gl_texturecompression.integer >= 2)
 852                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
 853                         else
 854                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_FASTEST);
 855                         CHECKGLERROR
 856                 }
 857                 switch(glt->texturetype)
 858                 {
 859                 case GLTEXTURETYPE_2D:
 860                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 861                         if (glt->flags & TEXF_MIPMAP)
 862                         {
 863                                 while (width > 1 || height > 1 || depth > 1)
 864                                 {
 865                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 866                                         prevbuffer = resizebuffer;
 867                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 868                                 }
 869                         }
 870                         break;
 871                 case GLTEXTURETYPE_3D:
 872                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 873                         if (glt->flags & TEXF_MIPMAP)
 874                         {
 875                                 while (width > 1 || height > 1 || depth > 1)
 876                                 {
 877                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 878                                         prevbuffer = resizebuffer;
 879                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 880                                 }
 881                         }
 882                         break;
 883                 case GLTEXTURETYPE_CUBEMAP:
 884                         // convert and upload each side in turn,
 885                         // from a continuous block of input texels
 886                         texturebuffer = (unsigned char *)prevbuffer;
 887                         for (i = 0;i < 6;i++)
 888                         {
 889                                 prevbuffer = texturebuffer;
 890                                 texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
 891                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 892                                 {
 893                                         Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 894                                         prevbuffer = resizebuffer;
 895                                 }
 896                                 // picmip/max_size
 897                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 898                                 {
 899                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 900                                         prevbuffer = resizebuffer;
 901                                 }
 902                                 mip = 0;
 903                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 904                                 if (glt->flags & TEXF_MIPMAP)
 905                                 {
 906                                         while (width > 1 || height > 1 || depth > 1)
 907                                         {
 908                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 909                                                 prevbuffer = resizebuffer;
 910                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 911                                         }
 912                                 }
 913                         }
 914                         break;
 915                 case GLTEXTURETYPE_RECTANGLE:
 916                         qglTexImage2D(GL_TEXTURE_RECTANGLE_ARB, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, NULL);CHECKGLERROR
 917                         break;
 918                 }
 919                 GL_SetupTextureParameters(glt->flags, glt->textype->textype, glt->texturetype);
 920         }
 921         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 922 }
 923
 924 int R_RealGetTexture(rtexture_t *rt)
 925 {
 926         if (rt)
 927         {
 928                 gltexture_t *glt;
 929                 glt = (gltexture_t *)rt;
 930                 if (glt->flags & GLTEXF_DYNAMIC)
 931                         R_UpdateDynamicTexture(glt);
 932                 if (glt->flags & GLTEXF_UPLOAD)
 933                 {
 934                         CHECKGLERROR
 935                         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 936                         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
 937                         if (glt->inputtexels)
 938                         {
 939                                 Mem_Free(glt->inputtexels);
 940                                 glt->inputtexels = NULL;
 941                                 glt->flags |= GLTEXF_DESTROYED;
 942                         }
 943                         else if (glt->flags & GLTEXF_DESTROYED)
 944                                 Con_Printf("R_GetTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 945                 }
 946
 947                 return glt->texnum;
 948         }
 949         else
 950                 return 0;
 951 }
 952
 953 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)
 954 {
 955         int i, size;
 956         gltexture_t *glt;
 957         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 958         textypeinfo_t *texinfo;
 959         int precache;
 960
 961         if (cls.state == ca_dedicated)
 962                 return NULL;
 963
 964         if (texturetype == GLTEXTURETYPE_RECTANGLE && !gl_texturerectangle)
 965         {
 966                 Con_Printf ("R_LoadTexture: rectangle texture not supported by driver\n");
 967                 return NULL;
 968         }
 969         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
 970         {
 971                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
 972                 return NULL;
 973         }
 974         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
 975         {
 976                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
 977                 return NULL;
 978         }
 979
 980         texinfo = R_GetTexTypeInfo(textype, flags);
 981         size = width * height * depth * sides * texinfo->inputbytesperpixel;
 982         if (size < 1)
 983         {
 984                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides, size);
 985                 return NULL;
 986         }
 987
 988         // clear the alpha flag if the texture has no transparent pixels
 989         switch(textype)
 990         {
 991         case TEXTYPE_PALETTE:
 992                 if (flags & TEXF_ALPHA)
 993                 {
 994                         flags &= ~TEXF_ALPHA;
 995                         if (data)
 996                         {
 997                                 for (i = 0;i < size;i++)
 998                                 {
 999                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
1000                                         {
1001                                                 flags |= TEXF_ALPHA;
1002                                                 break;
1003                                         }
1004                                 }
1005                         }
1006                 }
1007                 break;
1008         case TEXTYPE_RGBA:
1009         case TEXTYPE_BGRA:
1010                 if (flags & TEXF_ALPHA)
1011                 {
1012                         flags &= ~TEXF_ALPHA;
1013                         if (data)
1014                         {
1015                                 for (i = 3;i < size;i += 4)
1016                                 {
1017                                         if (data[i] < 255)
1018                                         {
1019                                                 flags |= TEXF_ALPHA;
1020                                                 break;
1021                                         }
1022                                 }
1023                         }
1024                 }
1025                 break;
1026         case TEXTYPE_SHADOWMAP:
1027                 break;
1028         default:
1029                 Host_Error("R_LoadTexture: unknown texture type");
1030         }
1031
1032         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
1033         if (identifier)
1034                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1035         glt->pool = pool;
1036         glt->chain = pool->gltchain;
1037         pool->gltchain = glt;
1038         glt->inputwidth = width;
1039         glt->inputheight = height;
1040         glt->inputdepth = depth;
1041         glt->flags = flags | GLTEXF_UPLOAD;
1042         glt->textype = texinfo;
1043         glt->texturetype = texturetype;
1044         glt->inputdatasize = size;
1045         glt->palette = palette;
1046         glt->glinternalformat = texinfo->glinternalformat;
1047         glt->glformat = texinfo->glformat;
1048         glt->gltype = texinfo->gltype;
1049         glt->bytesperpixel = texinfo->internalbytesperpixel;
1050         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1051         glt->texnum = 0;
1052         // init the dynamic texture attributes, too [11/22/2007 Black]
1053         glt->dirtytexnum = 0;
1054         glt->updatecallback = NULL;
1055         glt->updatacallback_data = NULL;
1056
1057         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1058
1059         precache = false;
1060         if (glt->flags & TEXF_ALWAYSPRECACHE)
1061                 precache = true;
1062         else if (r_precachetextures.integer >= 2)
1063                 precache = true;
1064         else if (r_precachetextures.integer >= 1)
1065                 if (glt->flags & TEXF_PRECACHE)
1066                         precache = true;
1067
1068         if (precache)
1069         {
1070                 // immediate upload (most common case)
1071                 // data may be NULL (blank texture for dynamic rendering)
1072                 CHECKGLERROR
1073                 qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
1074                 R_Upload(glt, data, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
1075         }
1076         else if (data)
1077         {
1078                 // deferred texture upload (menu graphics)
1079                 // optimize first if possible
1080                 if ((textype == TEXTYPE_BGRA || textype == TEXTYPE_RGBA) && glt->inputwidth * glt->inputheight * glt->inputdepth > glt->tilewidth * glt->tileheight * glt->tiledepth)
1081                 {
1082                         glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, glt->tilewidth*glt->tileheight*glt->tiledepth*glt->sides*glt->bytesperpixel);
1083                         Image_Resample32(data, glt->inputwidth, glt->inputheight, glt->inputdepth, glt->inputtexels, glt->tilewidth, glt->tileheight, glt->tiledepth, r_lerpimages.integer);
1084                         // change texture size accordingly
1085                         glt->inputwidth = glt->tilewidth;
1086                         glt->inputheight = glt->tileheight;
1087                         glt->inputdepth = glt->tiledepth;
1088                         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1089                 }
1090                 else
1091                 {
1092                         glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
1093                         memcpy(glt->inputtexels, data, size);
1094                 }
1095         }
1096
1097         // texture converting and uploading can take a while, so make sure we're sending keepalives
1098         CL_KeepaliveMessage(false);
1099
1100         return (rtexture_t *)glt;
1101 }
1102
1103 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)
1104 {
1105         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1106 }
1107
1108 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)
1109 {
1110         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1111 }
1112
1113 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)
1114 {
1115         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1116 }
1117
1118 static int R_ShadowMapTextureFlags(int precision, qboolean filter)
1119 {
1120         int flags = TEXF_ALWAYSPRECACHE | TEXF_CLAMP;
1121         if (filter)
1122                 flags |= TEXF_FORCELINEAR | TEXF_COMPARE;
1123         else
1124                 flags |= TEXF_FORCENEAREST;
1125         if (precision <= 16)
1126                 flags |= TEXF_LOWPRECISION;
1127         return flags;
1128 }
1129
1130 rtexture_t *R_LoadTextureShadowMapRectangle(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int precision, qboolean filter)
1131 {
1132         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_RECTANGLE, NULL, NULL);
1133 }
1134
1135 rtexture_t *R_LoadTextureShadowMap2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int precision, qboolean filter)
1136 {
1137         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_2D, NULL, NULL);
1138 }
1139
1140 rtexture_t *R_LoadTextureShadowMapCube(rtexturepool_t *rtexturepool, const char *identifier, int width, int precision, qboolean filter)
1141 {
1142     return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, R_ShadowMapTextureFlags(precision, filter), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_CUBEMAP, NULL, NULL);
1143 }
1144
1145 int R_TextureWidth(rtexture_t *rt)
1146 {
1147         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
1148 }
1149
1150 int R_TextureHeight(rtexture_t *rt)
1151 {
1152         return rt ? ((gltexture_t *)rt)->inputheight : 0;
1153 }
1154
1155 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int width, int height)
1156 {
1157         gltexture_t *glt;
1158         if (rt == NULL)
1159                 Host_Error("R_UpdateTexture: no texture supplied");
1160         if (data == NULL)
1161                 Host_Error("R_UpdateTexture: no data supplied");
1162
1163         // we need it to be uploaded before we can update a part of it
1164         R_RealGetTexture(rt);
1165
1166         // update part of the texture
1167         glt = (gltexture_t *)rt;
1168         R_Upload(glt, data, x, y, 0, width, height, 1);
1169 }
1170
1171 void R_ClearTexture (rtexture_t *rt)
1172 {
1173         gltexture_t *glt = (gltexture_t *)rt;
1174
1175         R_Upload( glt, NULL, 0, 0, 0, glt->tilewidth, glt->tileheight, glt->tiledepth );
1176 }