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_shadowmap              = {TEXTYPE_SHADOWMAP,4,4, 4.0f, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT24_ARB, GL_UNSIGNED_INT};
  64 static textypeinfo_t textype_projection             = {TEXTYPE_PROJECTION,4,4,4.0f, GL_LUMINANCE_ALPHA, GL_LUMINANCE16_ALPHA16, GL_UNSIGNED_SHORT};
  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 &textype_shadowmap;
 222                         case TEXTYPE_PROJECTION:
 223                                 return &textype_projection;
 224                         default:
 225                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
 226                                 return NULL;
 227                         }
 228                 }
 229         }
 230         return NULL; // this line only to hush compiler warnings
 231 }
 232
 233 // dynamic texture code [11/22/2007 Black]
 234 void R_MarkDirtyTexture(rtexture_t *rt) {
 235         gltexture_t *glt = (gltexture_t*) rt;
 236         if( !glt ) {
 237                 return;
 238         }
 239
 240         // dont do anything if the texture is already dirty (and make sure this *is* a dynamic texture after all!)
 241         if( !glt->dirtytexnum && glt->flags & GLTEXF_DYNAMIC ) {
 242                 glt->dirtytexnum = glt->texnum;
 243                 // mark it as dirty, so R_RealGetTexture gets called
 244                 glt->texnum = 0;
 245         }
 246 }
 247
 248 void R_MakeTextureDynamic(rtexture_t *rt, updatecallback_t updatecallback, void *data) {
 249         gltexture_t *glt = (gltexture_t*) rt;
 250         if( !glt ) {
 251                 return;
 252         }
 253
 254         glt->flags |= GLTEXF_DYNAMIC;
 255         glt->updatecallback = updatecallback;
 256         glt->updatacallback_data = data;
 257         glt->dirtytexnum = 0;
 258 }
 259
 260 static void R_UpdateDynamicTexture(gltexture_t *glt) {
 261         glt->texnum = glt->dirtytexnum;
 262         // reset dirtytexnum again (not dirty anymore)
 263         glt->dirtytexnum = 0;
 264         // TODO: now assert that t->texnum != 0 ?
 265         if( glt->updatecallback ) {
 266                 glt->updatecallback( (rtexture_t*) glt, glt->updatacallback_data );
 267         }
 268 }
 269
 270 static void R_UploadTexture(gltexture_t *t);
 271
 272 static void R_PrecacheTexture(gltexture_t *glt)
 273 {
 274         int precache;
 275         precache = false;
 276         if (glt->flags & TEXF_ALWAYSPRECACHE)
 277                 precache = true;
 278         else if (r_precachetextures.integer >= 2)
 279                 precache = true;
 280         else if (r_precachetextures.integer >= 1)
 281                 if (glt->flags & TEXF_PRECACHE)
 282                         precache = true;
 283
 284         if (precache)
 285                 R_UploadTexture(glt);
 286 }
 287
 288 int R_RealGetTexture(rtexture_t *rt)
 289 {
 290         if (rt)
 291         {
 292                 gltexture_t *glt;
 293                 glt = (gltexture_t *)rt;
 294                 if (glt->flags & GLTEXF_DYNAMIC)
 295                         R_UpdateDynamicTexture(glt);
 296                 if (glt->flags & GLTEXF_UPLOAD)
 297                         R_UploadTexture(glt);
 298
 299                 return glt->texnum;
 300         }
 301         else
 302                 return 0;
 303 }
 304
 305 void R_PurgeTexture(rtexture_t *rt)
 306 {
 307         if(rt && !(((gltexture_t*) rt)->flags & TEXF_PERSISTENT)) {
 308                 R_FreeTexture(rt);
 309         }
 310 }
 311
 312 void R_FreeTexture(rtexture_t *rt)
 313 {
 314         gltexture_t *glt, **gltpointer;
 315
 316         glt = (gltexture_t *)rt;
 317         if (glt == NULL)
 318                 Host_Error("R_FreeTexture: texture == NULL");
 319
 320         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 321         if (*gltpointer == glt)
 322                 *gltpointer = glt->chain;
 323         else
 324                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 325
 326         if (!(glt->flags & GLTEXF_UPLOAD))
 327         {
 328                 CHECKGLERROR
 329                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 330         }
 331
 332         if (glt->inputtexels)
 333                 Mem_Free(glt->inputtexels);
 334         Mem_Free(glt);
 335 }
 336
 337 rtexturepool_t *R_AllocTexturePool(void)
 338 {
 339         gltexturepool_t *pool;
 340         if (texturemempool == NULL)
 341                 return NULL;
 342         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 343         if (pool == NULL)
 344                 return NULL;
 345         pool->next = gltexturepoolchain;
 346         gltexturepoolchain = pool;
 347         pool->sentinel = TEXTUREPOOL_SENTINEL;
 348         return (rtexturepool_t *)pool;
 349 }
 350
 351 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 352 {
 353         gltexturepool_t *pool, **poolpointer;
 354         if (rtexturepool == NULL)
 355                 return;
 356         if (*rtexturepool == NULL)
 357                 return;
 358         pool = (gltexturepool_t *)(*rtexturepool);
 359         *rtexturepool = NULL;
 360         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 361                 Host_Error("R_FreeTexturePool: pool already freed");
 362         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 363         if (*poolpointer == pool)
 364                 *poolpointer = pool->next;
 365         else
 366                 Host_Error("R_FreeTexturePool: pool not linked");
 367         while (pool->gltchain)
 368                 R_FreeTexture((rtexture_t *)pool->gltchain);
 369         Mem_Free(pool);
 370 }
 371
 372
 373 typedef struct glmode_s
 374 {
 375         char *name;
 376         int minification, magnification;
 377 }
 378 glmode_t;
 379
 380 static glmode_t modes[6] =
 381 {
 382         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 383         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 384         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 385         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 386         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 387         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 388 };
 389
 390 static void GL_TextureMode_f (void)
 391 {
 392         int i;
 393         GLint oldbindtexnum;
 394         gltexture_t *glt;
 395         gltexturepool_t *pool;
 396
 397         if (Cmd_Argc() == 1)
 398         {
 399                 for (i = 0;i < 6;i++)
 400                 {
 401                         if (gl_filter_min == modes[i].minification)
 402                         {
 403                                 Con_Printf("%s\n", modes[i].name);
 404                                 return;
 405                         }
 406                 }
 407                 Con_Print("current filter is unknown???\n");
 408                 return;
 409         }
 410
 411         for (i = 0;i < 6;i++)
 412                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 413                         break;
 414         if (i == 6)
 415         {
 416                 Con_Print("bad filter name\n");
 417                 return;
 418         }
 419
 420         gl_filter_min = modes[i].minification;
 421         gl_filter_mag = modes[i].magnification;
 422
 423         // change all the existing mipmap texture objects
 424         // FIXME: force renderer(/client/something?) restart instead?
 425         CHECKGLERROR
 426         for (pool = gltexturepoolchain;pool;pool = pool->next)
 427         {
 428                 for (glt = pool->gltchain;glt;glt = glt->chain)
 429                 {
 430                         // only update already uploaded images
 431                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 432                         {
 433                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 434                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 435                                 if (glt->flags & TEXF_MIPMAP)
 436                                 {
 437                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 438                                 }
 439                                 else
 440                                 {
 441                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 442                                 }
 443                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 444                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 445                         }
 446                 }
 447         }
 448 }
 449
 450 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 451 {
 452         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 453
 454         if (gl_max_size.integer > gl_max_texture_size)
 455                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 456
 457         switch (texturetype)
 458         {
 459         default:
 460         case GLTEXTURETYPE_1D:
 461         case GLTEXTURETYPE_2D:
 462                 maxsize = gl_max_texture_size;
 463                 break;
 464         case GLTEXTURETYPE_3D:
 465                 maxsize = gl_max_3d_texture_size;
 466                 break;
 467         case GLTEXTURETYPE_CUBEMAP:
 468                 maxsize = gl_max_cube_map_texture_size;
 469                 break;
 470         }
 471
 472         if (flags & TEXF_PICMIP)
 473         {
 474                 maxsize = min(maxsize, gl_max_size.integer);
 475                 picmip = gl_picmip.integer;
 476         }
 477
 478         if (outwidth)
 479         {
 480                 if (gl_support_arb_texture_non_power_of_two)
 481                         width2 = min(inwidth >> picmip, maxsize);
 482                 else
 483                 {
 484                         for (width2 = 1;width2 < inwidth;width2 <<= 1);
 485                         for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 486                 }
 487                 *outwidth = max(1, width2);
 488         }
 489         if (outheight)
 490         {
 491                 if (gl_support_arb_texture_non_power_of_two)
 492                         height2 = min(inheight >> picmip, maxsize);
 493                 else
 494                 {
 495                         for (height2 = 1;height2 < inheight;height2 <<= 1);
 496                         for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 497                 }
 498                 *outheight = max(1, height2);
 499         }
 500         if (outdepth)
 501         {
 502                 if (gl_support_arb_texture_non_power_of_two)
 503                         depth2 = min(indepth >> picmip, maxsize);
 504                 else
 505                 {
 506                         for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 507                         for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 508                 }
 509                 *outdepth = max(1, depth2);
 510         }
 511 }
 512
 513
 514 static int R_CalcTexelDataSize (gltexture_t *glt)
 515 {
 516         int width2, height2, depth2, size;
 517
 518         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
 519
 520         size = width2 * height2 * depth2;
 521
 522         if (glt->flags & TEXF_MIPMAP)
 523         {
 524                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 525                 {
 526                         if (width2 > 1)
 527                                 width2 >>= 1;
 528                         if (height2 > 1)
 529                                 height2 >>= 1;
 530                         if (depth2 > 1)
 531                                 depth2 >>= 1;
 532                         size += width2 * height2 * depth2;
 533                 }
 534         }
 535
 536         return (int)(size * glt->textype->glinternalbytesperpixel) * glt->sides;
 537 }
 538
 539 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 540 {
 541         int glsize;
 542         int isloaded;
 543         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 544         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 545         gltexture_t *glt;
 546         gltexturepool_t *pool;
 547         if (printeach)
 548                 Con_Print("glsize input loaded mip alpha name\n");
 549         for (pool = gltexturepoolchain;pool;pool = pool->next)
 550         {
 551                 pooltotal = 0;
 552                 pooltotalt = 0;
 553                 pooltotalp = 0;
 554                 poolloaded = 0;
 555                 poolloadedt = 0;
 556                 poolloadedp = 0;
 557                 for (glt = pool->gltchain;glt;glt = glt->chain)
 558                 {
 559                         glsize = R_CalcTexelDataSize(glt);
 560                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 561                         pooltotal++;
 562                         pooltotalt += glsize;
 563                         pooltotalp += glt->inputdatasize;
 564                         if (isloaded)
 565                         {
 566                                 poolloaded++;
 567                                 poolloadedt += glsize;
 568                                 poolloadedp += glt->inputdatasize;
 569                         }
 570                         if (printeach)
 571                                 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);
 572                 }
 573                 if (printpool)
 574                         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);
 575                 sumtotal += pooltotal;
 576                 sumtotalt += pooltotalt;
 577                 sumtotalp += pooltotalp;
 578                 sumloaded += poolloaded;
 579                 sumloadedt += poolloadedt;
 580                 sumloadedp += poolloadedp;
 581         }
 582         if (printtotal)
 583                 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);
 584 }
 585
 586 static void R_TextureStats_f(void)
 587 {
 588         R_TextureStats_Print(true, true, true);
 589 }
 590
 591 static void r_textures_start(void)
 592 {
 593         // LordHavoc: allow any alignment
 594         CHECKGLERROR
 595         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
 596         qglPixelStorei(GL_PACK_ALIGNMENT, 1);CHECKGLERROR
 597
 598         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 599
 600         // Disable JPEG screenshots if the DLL isn't loaded
 601         if (! JPEG_OpenLibrary ())
 602                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 603         // TODO: support png screenshots?
 604         PNG_OpenLibrary ();
 605 }
 606
 607 static void r_textures_shutdown(void)
 608 {
 609         rtexturepool_t *temp;
 610
 611         JPEG_CloseLibrary ();
 612
 613         while(gltexturepoolchain)
 614         {
 615                 temp = (rtexturepool_t *) gltexturepoolchain;
 616                 R_FreeTexturePool(&temp);
 617         }
 618
 619         resizebuffersize = 0;
 620         texturebuffersize = 0;
 621         resizebuffer = NULL;
 622         colorconvertbuffer = NULL;
 623         texturebuffer = NULL;
 624         Mem_FreePool(&texturemempool);
 625 }
 626
 627 static void r_textures_newmap(void)
 628 {
 629 }
 630
 631 void R_Textures_Init (void)
 632 {
 633         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 634         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 635         Cvar_RegisterVariable (&gl_max_size);
 636         Cvar_RegisterVariable (&gl_picmip);
 637         Cvar_RegisterVariable (&r_lerpimages);
 638         Cvar_RegisterVariable (&r_precachetextures);
 639         Cvar_RegisterVariable (&gl_texture_anisotropy);
 640         Cvar_RegisterVariable (&gl_texturecompression);
 641         Cvar_RegisterVariable (&gl_texturecompression_color);
 642         Cvar_RegisterVariable (&gl_texturecompression_normal);
 643         Cvar_RegisterVariable (&gl_texturecompression_gloss);
 644         Cvar_RegisterVariable (&gl_texturecompression_glow);
 645         Cvar_RegisterVariable (&gl_texturecompression_2d);
 646         Cvar_RegisterVariable (&gl_texturecompression_q3bsplightmaps);
 647         Cvar_RegisterVariable (&gl_texturecompression_q3bspdeluxemaps);
 648         Cvar_RegisterVariable (&gl_texturecompression_sky);
 649         Cvar_RegisterVariable (&gl_texturecompression_lightcubemaps);
 650
 651         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 652 }
 653
 654 void R_Textures_Frame (void)
 655 {
 656         static int old_aniso = 0;
 657
 658         // could do procedural texture animation here, if we keep track of which
 659         // textures were accessed this frame...
 660
 661         // free the resize buffers
 662         resizebuffersize = 0;
 663         if (resizebuffer)
 664         {
 665                 Mem_Free(resizebuffer);
 666                 resizebuffer = NULL;
 667         }
 668         if (colorconvertbuffer)
 669         {
 670                 Mem_Free(colorconvertbuffer);
 671                 colorconvertbuffer = NULL;
 672         }
 673
 674         if (old_aniso != gl_texture_anisotropy.integer)
 675         {
 676                 gltexture_t *glt;
 677                 gltexturepool_t *pool;
 678                 GLint oldbindtexnum;
 679
 680                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 681
 682                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 683
 684                 CHECKGLERROR
 685                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 686                 {
 687                         for (glt = pool->gltchain;glt;glt = glt->chain)
 688                         {
 689                                 // only update already uploaded images
 690                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
 691                                 {
 692                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 693
 694                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 695                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 696
 697                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 698                                 }
 699                         }
 700                 }
 701         }
 702 }
 703
 704 void R_MakeResizeBufferBigger(int size)
 705 {
 706         if (resizebuffersize < size)
 707         {
 708                 resizebuffersize = size;
 709                 if (resizebuffer)
 710                         Mem_Free(resizebuffer);
 711                 if (colorconvertbuffer)
 712                         Mem_Free(colorconvertbuffer);
 713                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 714                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 715                 if (!resizebuffer || !colorconvertbuffer)
 716                         Host_Error("R_Upload: out of memory");
 717         }
 718 }
 719
 720 static void GL_SetupTextureParameters(int flags, textype_t textype, int texturetype)
 721 {
 722         int textureenum = gltexturetypeenums[texturetype];
 723         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 724
 725         CHECKGLERROR
 726
 727         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 728         {
 729                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 730                 if (gl_texture_anisotropy.integer != aniso)
 731                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 732                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 733         }
 734         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 735         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 736         if (gltexturetypedimensions[texturetype] >= 3)
 737         {
 738                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 739         }
 740
 741         CHECKGLERROR
 742         if (flags & TEXF_FORCENEAREST)
 743         {
 744                 if (flags & TEXF_MIPMAP)
 745                 {
 746                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 747                 }
 748                 else
 749                 {
 750                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 751                 }
 752                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 753         }
 754         else if (flags & TEXF_FORCELINEAR)
 755         {
 756                 if (flags & TEXF_MIPMAP)
 757                 {
 758                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 759                         {
 760                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 761                         }
 762                         else
 763                         {
 764                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 765                         }
 766                 }
 767                 else
 768                 {
 769                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 770                 }
 771                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 772         }
 773         else
 774         {
 775                 if (flags & TEXF_MIPMAP)
 776                 {
 777                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 778                 }
 779                 else
 780                 {
 781                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 782                 }
 783                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 784         }
 785
 786         if (textype == TEXTYPE_SHADOWMAP)
 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                 qglTexParameteri(textureenum, GL_DEPTH_TEXTURE_MODE_ARB, GL_LUMINANCE);CHECKGLERROR
 798         }
 799
 800         CHECKGLERROR
 801 }
 802
 803 static void R_Upload(gltexture_t *glt, const unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
 804 {
 805         int i, mip, width, height, depth;
 806         GLint oldbindtexnum;
 807         const unsigned char *prevbuffer;
 808         prevbuffer = data;
 809
 810         CHECKGLERROR
 811
 812         // we need to restore the texture binding after finishing the upload
 813         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
 814         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
 815
 816         // these are rounded up versions of the size to do better resampling
 817         if (gl_support_arb_texture_non_power_of_two || glt->texturetype == GLTEXTURETYPE_RECTANGLE)
 818         {
 819                 width = glt->inputwidth;
 820                 height = glt->inputheight;
 821                 depth = glt->inputdepth;
 822         }
 823         else
 824         {
 825                 for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
 826                 for (height = 1;height < glt->inputheight;height <<= 1);
 827                 for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
 828         }
 829
 830         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
 831         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
 832
 833         if (prevbuffer == NULL)
 834         {
 835                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
 836                 prevbuffer = resizebuffer;
 837         }
 838         else if (glt->textype->textype == TEXTYPE_PALETTE)
 839         {
 840                 // promote paletted to BGRA, so we only have to worry about BGRA in the rest of this code
 841                 Image_Copy8bitBGRA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
 842                 prevbuffer = colorconvertbuffer;
 843         }
 844
 845         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
 846         {
 847                 // update a portion of the image
 848                 switch(glt->texturetype)
 849                 {
 850                 case GLTEXTURETYPE_1D:
 851                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 852                         break;
 853                 case GLTEXTURETYPE_2D:
 854                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 855                         break;
 856                 case GLTEXTURETYPE_3D:
 857                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 858                         break;
 859                 default:
 860                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
 861                         break;
 862                 }
 863         }
 864         else
 865         {
 866                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
 867                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
 868
 869                 // upload the image for the first time
 870                 glt->flags &= ~GLTEXF_UPLOAD;
 871
 872                 // cubemaps contain multiple images and thus get processed a bit differently
 873                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
 874                 {
 875                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 876                         {
 877                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 878                                 prevbuffer = resizebuffer;
 879                         }
 880                         // picmip/max_size
 881                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 882                         {
 883                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 884                                 prevbuffer = resizebuffer;
 885                         }
 886                 }
 887                 mip = 0;
 888                 if (gl_support_texture_compression)
 889                 {
 890                         if (gl_texturecompression.integer >= 2)
 891                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
 892                         else
 893                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_FASTEST);
 894                         CHECKGLERROR
 895                 }
 896                 switch(glt->texturetype)
 897                 {
 898                 case GLTEXTURETYPE_1D:
 899                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 900                         if (glt->flags & TEXF_MIPMAP)
 901                         {
 902                                 while (width > 1 || height > 1 || depth > 1)
 903                                 {
 904                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 905                                         prevbuffer = resizebuffer;
 906                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 907                                 }
 908                         }
 909                         break;
 910                 case GLTEXTURETYPE_2D:
 911                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 912                         if (glt->flags & TEXF_MIPMAP)
 913                         {
 914                                 while (width > 1 || height > 1 || depth > 1)
 915                                 {
 916                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 917                                         prevbuffer = resizebuffer;
 918                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 919                                 }
 920                         }
 921                         break;
 922                 case GLTEXTURETYPE_3D:
 923                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 924                         if (glt->flags & TEXF_MIPMAP)
 925                         {
 926                                 while (width > 1 || height > 1 || depth > 1)
 927                                 {
 928                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 929                                         prevbuffer = resizebuffer;
 930                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 931                                 }
 932                         }
 933                         break;
 934                 case GLTEXTURETYPE_CUBEMAP:
 935                         // convert and upload each side in turn,
 936                         // from a continuous block of input texels
 937                         texturebuffer = (unsigned char *)prevbuffer;
 938                         for (i = 0;i < 6;i++)
 939                         {
 940                                 prevbuffer = texturebuffer;
 941                                 texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
 942                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
 943                                 {
 944                                         Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
 945                                         prevbuffer = resizebuffer;
 946                                 }
 947                                 // picmip/max_size
 948                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
 949                                 {
 950                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
 951                                         prevbuffer = resizebuffer;
 952                                 }
 953                                 mip = 0;
 954                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 955                                 if (glt->flags & TEXF_MIPMAP)
 956                                 {
 957                                         while (width > 1 || height > 1 || depth > 1)
 958                                         {
 959                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
 960                                                 prevbuffer = resizebuffer;
 961                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
 962                                         }
 963                                 }
 964                         }
 965                         break;
 966                 case GLTEXTURETYPE_RECTANGLE:
 967                         qglTexImage2D(GL_TEXTURE_RECTANGLE_ARB, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, NULL);CHECKGLERROR
 968                         break;
 969                 }
 970                 GL_SetupTextureParameters(glt->flags, glt->textype->textype, glt->texturetype);
 971         }
 972         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
 973 }
 974
 975 static void R_UploadTexture (gltexture_t *glt)
 976 {
 977         if (!(glt->flags & GLTEXF_UPLOAD))
 978                 return;
 979
 980         CHECKGLERROR
 981         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
 982         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
 983         if (glt->inputtexels)
 984         {
 985                 Mem_Free(glt->inputtexels);
 986                 glt->inputtexels = NULL;
 987                 glt->flags |= GLTEXF_DESTROYED;
 988         }
 989         else if (glt->flags & GLTEXF_DESTROYED)
 990                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 991 }
 992
 993 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)
 994 {
 995         int i, size;
 996         gltexture_t *glt;
 997         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 998         textypeinfo_t *texinfo;
 999
1000         if (cls.state == ca_dedicated)
1001                 return NULL;
1002
1003         if (texturetype == GLTEXTURETYPE_RECTANGLE && !gl_texturerectangle)
1004         {
1005                 Con_Printf ("R_LoadTexture: rectangle texture not supported by driver\n");
1006                 return NULL;
1007         }
1008         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
1009         {
1010                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
1011                 return NULL;
1012         }
1013         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
1014         {
1015                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
1016                 return NULL;
1017         }
1018
1019         texinfo = R_GetTexTypeInfo(textype, flags);
1020         size = width * height * depth * sides * texinfo->inputbytesperpixel;
1021         if (size < 1)
1022         {
1023                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides, size);
1024                 return NULL;
1025         }
1026
1027         // clear the alpha flag if the texture has no transparent pixels
1028         switch(textype)
1029         {
1030         case TEXTYPE_PALETTE:
1031                 if (flags & TEXF_ALPHA)
1032                 {
1033                         flags &= ~TEXF_ALPHA;
1034                         if (data)
1035                         {
1036                                 for (i = 0;i < size;i++)
1037                                 {
1038                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
1039                                         {
1040                                                 flags |= TEXF_ALPHA;
1041                                                 break;
1042                                         }
1043                                 }
1044                         }
1045                 }
1046                 break;
1047         case TEXTYPE_RGBA:
1048         case TEXTYPE_BGRA:
1049                 if (flags & TEXF_ALPHA)
1050                 {
1051                         flags &= ~TEXF_ALPHA;
1052                         if (data)
1053                         {
1054                                 for (i = 3;i < size;i += 4)
1055                                 {
1056                                         if (data[i] < 255)
1057                                         {
1058                                                 flags |= TEXF_ALPHA;
1059                                                 break;
1060                                         }
1061                                 }
1062                         }
1063                 }
1064                 break;
1065         case TEXTYPE_SHADOWMAP:
1066         case TEXTYPE_PROJECTION:
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 rtexture_t *R_LoadTextureShadowMapRectangle(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, qboolean filter)
1135 {
1136         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, TEXF_ALWAYSPRECACHE | TEXF_CLAMP | (filter ? TEXF_FORCELINEAR | TEXF_COMPARE : TEXF_FORCENEAREST), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_RECTANGLE, NULL, NULL);
1137 }
1138
1139 rtexture_t *R_LoadTextureShadowMap2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, qboolean filter)
1140 {
1141         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, TEXF_ALWAYSPRECACHE | TEXF_CLAMP | (filter ? TEXF_FORCELINEAR | TEXF_COMPARE : TEXF_FORCENEAREST), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_2D, NULL, NULL);
1142 }
1143
1144 rtexture_t *R_LoadTextureShadowMapCube(rtexturepool_t *rtexturepool, const char *identifier, int width, qboolean filter)
1145 {
1146     return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, TEXF_ALWAYSPRECACHE | TEXF_CLAMP | (filter ? TEXF_FORCELINEAR | TEXF_COMPARE : TEXF_FORCENEAREST), TEXTYPE_SHADOWMAP, GLTEXTURETYPE_CUBEMAP, NULL, NULL);
1147 }
1148
1149 rtexture_t *R_LoadTextureCubeProjection(rtexturepool_t *rtexturepool, const char *identifier, int size, int border)
1150 {
1151     // maps to a 2x3 texture rectangle with normalized coordinates (must be scaled by size after lookup)
1152     // +-
1153     // XX
1154     // YY
1155     // ZZ
1156     rtexture_t *projection;
1157         unsigned short *data, *texel;
1158         unsigned int sizebits = 0, stepbits = 0, res, i, j, k;
1159         while ((1 << sizebits) < size) sizebits++;
1160         while ((1 << stepbits) <= border) stepbits++;
1161     stepbits = min(stepbits, sizebits);
1162         res = size>>stepbits;
1163         stepbits += 16 - sizebits - 1;
1164         data = (unsigned short *)Mem_Alloc(texturemempool, 2*sizeof(unsigned short)*res*res*6);
1165         texel = data;
1166         for (i = 0;i < 6;i++)
1167         {
1168                 unsigned int x = (i%2)<<16, y = (i/2)<<16;
1169                 for (j = 0;j < res;j++)
1170                 {
1171                         for (k = 0;k < res;k++)
1172                         {
1173                                 *texel++ = (x + ((2*k + 1)<<stepbits))/2;
1174                                 *texel++ = (y + ((2*j + 1)<<stepbits))/3;
1175                         }
1176                 }
1177         }
1178         projection = R_SetupTexture(rtexturepool, identifier, res, res, 1, 6, TEXF_ALWAYSPRECACHE | TEXF_FORCELINEAR | TEXF_CLAMP, TEXTYPE_PROJECTION, GLTEXTURETYPE_CUBEMAP, (unsigned char *)data, NULL);
1179         Mem_Free(data);
1180     return projection;
1181 }
1182
1183 int R_TextureHasAlpha(rtexture_t *rt)
1184 {
1185         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1186 }
1187
1188 int R_TextureWidth(rtexture_t *rt)
1189 {
1190         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
1191 }
1192
1193 int R_TextureHeight(rtexture_t *rt)
1194 {
1195         return rt ? ((gltexture_t *)rt)->inputheight : 0;
1196 }
1197
1198 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int width, int height)
1199 {
1200         gltexture_t *glt;
1201         if (rt == NULL)
1202                 Host_Error("R_UpdateTexture: no texture supplied");
1203         if (data == NULL)
1204                 Host_Error("R_UpdateTexture: no data supplied");
1205         glt = (gltexture_t *)rt;
1206
1207         // we need it to be uploaded before we can update a part of it
1208         if (glt->flags & GLTEXF_UPLOAD)
1209                 R_UploadTexture(glt);
1210
1211         // update part of the texture
1212         R_Upload(glt, data, x, y, 0, width, height, 1);
1213 }
1214
1215 void R_ClearTexture (rtexture_t *rt)
1216 {
1217         gltexture_t *glt = (gltexture_t *)rt;
1218
1219         R_Upload( glt, NULL, 0, 0, 0, glt->tilewidth, glt->tileheight, glt->tiledepth );
1220 }