gl_textures.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5
   6 cvar_t  gl_max_size = {CVAR_SAVE, "gl_max_size", "2048"};
   7 cvar_t  gl_max_scrapsize = {CVAR_SAVE, "gl_max_scrapsize", "256"};
   8 cvar_t  gl_picmip = {CVAR_SAVE, "gl_picmip", "0"};
   9 cvar_t  r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
  10 cvar_t  r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
  11 cvar_t  gl_texture_anisotropy = {CVAR_SAVE, "gl_texture_anisotropy", "1"};
  12
  13 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  14 int             gl_filter_mag = GL_LINEAR;
  15
  16
  17 static mempool_t *texturemempool;
  18
  19 // note: this must not conflict with TEXF_ flags in r_textures.h
  20 // cleared when a texture is uploaded
  21 #define GLTEXF_UPLOAD 0x00010000
  22 // bitmask for mismatch checking
  23 #define GLTEXF_IMPORTANTBITS (0)
  24 // set when image is uploaded and freed
  25 #define GLTEXF_DESTROYED 0x00040000
  26
  27 // size of images which hold fragment textures, ignores picmip and max_size
  28 static int block_size;
  29
  30 typedef struct
  31 {
  32         int textype;
  33         int inputbytesperpixel;
  34         int internalbytesperpixel;
  35         int glformat;
  36         int glinternalformat;
  37 }
  38 textypeinfo_t;
  39
  40 static textypeinfo_t textype_palette       = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 3};
  41 static textypeinfo_t textype_rgb           = {TEXTYPE_RGB    , 3, 3, GL_RGB    , 3};
  42 static textypeinfo_t textype_rgba          = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 3};
  43 static textypeinfo_t textype_palette_alpha = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 4};
  44 static textypeinfo_t textype_rgba_alpha    = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 4};
  45 static textypeinfo_t textype_dsdt          = {TEXTYPE_DSDT   , 2, 2, GL_DSDT_NV, GL_DSDT8_NV};
  46
  47 // a tiling texture (most common type)
  48 #define GLIMAGETYPE_TILE 0
  49 // a fragments texture (contains one or more fragment textures)
  50 #define GLIMAGETYPE_FRAGMENTS 1
  51
  52 #define GLTEXTURETYPE_1D 0
  53 #define GLTEXTURETYPE_2D 1
  54 #define GLTEXTURETYPE_3D 2
  55 #define GLTEXTURETYPE_CUBEMAP 3
  56
  57 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  58 static int gltexturetypebindingenums[4] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB};
  59 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  60 static int cubemapside[6] =
  61 {
  62         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  63         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  64         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  65         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  66         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  67         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  68 };
  69
  70 // a gltextureimage can have one (or more if fragments) gltextures inside
  71 typedef struct gltextureimage_s
  72 {
  73         struct gltextureimage_s *imagechain;
  74         int texturecount;
  75         int type; // one of the GLIMAGETYPE_ values
  76         int texturetype; // one of the GLTEXTURETYPE_ values
  77         int sides; // 1 or 6 depending on texturetype
  78         int texnum; // GL texture slot number
  79         int width, height, depth; // 3D texture support
  80         int bytesperpixel; // bytes per pixel
  81         int glformat; // GL_RGB or GL_RGBA
  82         int glinternalformat; // 3 or 4
  83         int flags;
  84         short *blockallocation; // fragment allocation (2D only)
  85 }
  86 gltextureimage_t;
  87
  88 typedef struct gltexture_s
  89 {
  90         // this field is exposed to the R_GetTexture macro, for speed reasons
  91         // (must be identical in rtexture_t)
  92         int texnum; // GL texture slot number
  93
  94         // pointer to texturepool (check this to see if the texture is allocated)
  95         struct gltexturepool_s *pool;
  96         // pointer to next texture in texturepool chain
  97         struct gltexture_s *chain;
  98         // pointer into gltextureimage array
  99         gltextureimage_t *image;
 100         // name of the texture (this might be removed someday), no duplicates
 101         char identifier[32];
 102         // location in the image, and size
 103         int x, y, z, width, height, depth;
 104         // copy of the original texture(s) supplied to the upload function, for
 105         // delayed uploads (non-precached)
 106         qbyte *inputtexels;
 107         // original data size in *inputtexels
 108         int inputdatasize;
 109         // flags supplied to the LoadTexture function
 110         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 111         int flags;
 112         // pointer to one of the textype_ structs
 113         textypeinfo_t *textype;
 114         // one of the GLTEXTURETYPE_ values
 115         int texturetype;
 116         // palette if the texture is TEXTYPE_PALETTE
 117         const unsigned int *palette;
 118 }
 119 gltexture_t;
 120
 121 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 122
 123 typedef struct gltexturepool_s
 124 {
 125         unsigned int sentinel;
 126         struct gltextureimage_s *imagechain;
 127         struct gltexture_s *gltchain;
 128         struct gltexturepool_s *next;
 129 }
 130 gltexturepool_t;
 131
 132 static gltexturepool_t *gltexturepoolchain = NULL;
 133
 134 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
 135 static int resizebuffersize = 0;
 136 static qbyte *texturebuffer;
 137 static int texturebuffersize = 0;
 138
 139 static int realmaxsize = 0;
 140
 141 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 142 {
 143         if (flags & TEXF_ALPHA)
 144         {
 145                 switch(textype)
 146                 {
 147                 case TEXTYPE_PALETTE:
 148                         return &textype_palette_alpha;
 149                 case TEXTYPE_RGB:
 150                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
 151                         return NULL;
 152                 case TEXTYPE_RGBA:
 153                         return &textype_rgba_alpha;
 154                 default:
 155                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 156                         return NULL;
 157                 }
 158         }
 159         else
 160         {
 161                 switch(textype)
 162                 {
 163                 case TEXTYPE_PALETTE:
 164                         return &textype_palette;
 165                 case TEXTYPE_RGB:
 166                         return &textype_rgb;
 167                 case TEXTYPE_RGBA:
 168                         return &textype_rgba;
 169                 case TEXTYPE_DSDT:
 170                         return &textype_dsdt;
 171                 default:
 172                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 173                         return NULL;
 174                 }
 175         }
 176 }
 177
 178 static void R_UploadTexture(gltexture_t *t);
 179
 180 static void R_PrecacheTexture(gltexture_t *glt)
 181 {
 182         int precache;
 183         precache = false;
 184         if (glt->flags & TEXF_ALWAYSPRECACHE)
 185                 precache = true;
 186         else if (r_precachetextures.integer >= 2)
 187                 precache = true;
 188         else if (r_precachetextures.integer >= 1)
 189                 if (glt->flags & TEXF_PRECACHE)
 190                         precache = true;
 191
 192         if (precache)
 193                 R_UploadTexture(glt);
 194 }
 195
 196 int R_RealGetTexture(rtexture_t *rt)
 197 {
 198         if (rt)
 199         {
 200                 gltexture_t *glt;
 201                 glt = (gltexture_t *)rt;
 202                 if (glt->flags & GLTEXF_UPLOAD)
 203                         R_UploadTexture(glt);
 204                 glt->texnum = glt->image->texnum;
 205                 return glt->image->texnum;
 206         }
 207         else
 208                 return 0;
 209 }
 210
 211 void R_FreeTexture(rtexture_t *rt)
 212 {
 213         gltexture_t *glt, **gltpointer;
 214         gltextureimage_t *image, **gltimagepointer;
 215
 216         glt = (gltexture_t *)rt;
 217         if (glt == NULL)
 218                 Host_Error("R_FreeTexture: texture == NULL\n");
 219
 220         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 221         if (*gltpointer == glt)
 222                 *gltpointer = glt->chain;
 223         else
 224                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
 225
 226         // note: if freeing a fragment texture, this will not make the claimed
 227         // space available for new textures unless all other fragments in the
 228         // image are also freed
 229         if (glt->image)
 230         {
 231                 image = glt->image;
 232                 image->texturecount--;
 233                 if (image->texturecount < 1)
 234                 {
 235                         for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 236                         if (*gltimagepointer == image)
 237                                 *gltimagepointer = image->imagechain;
 238                         else
 239                                 Host_Error("R_FreeTexture: image not linked in pool\n");
 240                         if (image->texnum)
 241                                 qglDeleteTextures(1, &image->texnum);
 242                         if (image->blockallocation)
 243                                 Mem_Free(image->blockallocation);
 244                         Mem_Free(image);
 245                 }
 246         }
 247
 248         if (glt->inputtexels)
 249                 Mem_Free(glt->inputtexels);
 250         Mem_Free(glt);
 251 }
 252
 253 rtexturepool_t *R_AllocTexturePool(void)
 254 {
 255         gltexturepool_t *pool;
 256         if (texturemempool == NULL)
 257                 return NULL;
 258         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 259         if (pool == NULL)
 260                 return NULL;
 261         pool->next = gltexturepoolchain;
 262         gltexturepoolchain = pool;
 263         pool->sentinel = TEXTUREPOOL_SENTINEL;
 264         return (rtexturepool_t *)pool;
 265 }
 266
 267 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 268 {
 269         gltexturepool_t *pool, **poolpointer;
 270         if (rtexturepool == NULL)
 271                 return;
 272         if (*rtexturepool == NULL)
 273                 return;
 274         pool = (gltexturepool_t *)(*rtexturepool);
 275         *rtexturepool = NULL;
 276         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 277                 Host_Error("R_FreeTexturePool: pool already freed\n");
 278         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 279         if (*poolpointer == pool)
 280                 *poolpointer = pool->next;
 281         else
 282                 Host_Error("R_FreeTexturePool: pool not linked\n");
 283         while (pool->gltchain)
 284                 R_FreeTexture((rtexture_t *)pool->gltchain);
 285         if (pool->imagechain)
 286                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 287         Mem_Free(pool);
 288 }
 289
 290
 291 typedef struct
 292 {
 293         char *name;
 294         int minification, magnification;
 295 }
 296 glmode_t;
 297
 298 static glmode_t modes[] =
 299 {
 300         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 301         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 302         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 303         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 304         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 305         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 306 };
 307
 308 static void GL_TextureMode_f (void)
 309 {
 310         int i;
 311         GLint oldbindtexnum;
 312         gltextureimage_t *image;
 313         gltexturepool_t *pool;
 314
 315         if (Cmd_Argc() == 1)
 316         {
 317                 for (i = 0;i < 6;i++)
 318                 {
 319                         if (gl_filter_min == modes[i].minification)
 320                         {
 321                                 Con_Printf("%s\n", modes[i].name);
 322                                 return;
 323                         }
 324                 }
 325                 Con_Print("current filter is unknown???\n");
 326                 return;
 327         }
 328
 329         for (i = 0;i < 6;i++)
 330                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 331                         break;
 332         if (i == 6)
 333         {
 334                 Con_Print("bad filter name\n");
 335                 return;
 336         }
 337
 338         gl_filter_min = modes[i].minification;
 339         gl_filter_mag = modes[i].magnification;
 340
 341         // change all the existing mipmap texture objects
 342         // FIXME: force renderer(/client/something?) restart instead?
 343         for (pool = gltexturepoolchain;pool;pool = pool->next)
 344         {
 345                 for (image = pool->imagechain;image;image = image->imagechain)
 346                 {
 347                         // only update already uploaded images
 348                         if (!(image->flags & GLTEXF_UPLOAD) && !(image->flags & (TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 349                         {
 350                                 qglGetIntegerv(gltexturetypebindingenums[image->texturetype], &oldbindtexnum);
 351                                 qglBindTexture(gltexturetypeenums[image->texturetype], image->texnum);
 352                                 if (image->flags & TEXF_MIPMAP)
 353                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);
 354                                 else
 355                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 356                                 qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 357                                 qglBindTexture(gltexturetypeenums[image->texturetype], oldbindtexnum);
 358                         }
 359                 }
 360         }
 361 }
 362
 363 static int R_CalcTexelDataSize (gltexture_t *glt)
 364 {
 365         int width2, height2, depth2, size, picmip;
 366         if (glt->flags & TEXF_FRAGMENT)
 367                 size = glt->width * glt->height * glt->depth;
 368         else
 369         {
 370                 picmip = 0;
 371                 if (glt->flags & TEXF_PICMIP)
 372                         picmip = gl_picmip.integer;
 373                 if (gl_max_size.integer > realmaxsize)
 374                         Cvar_SetValue("gl_max_size", realmaxsize);
 375                 // calculate final size
 376                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 377                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 378                 for (depth2 = 1;depth2 < glt->depth;depth2 <<= 1);
 379                 for (width2 >>= picmip;width2 > gl_max_size.integer;width2 >>= 1);
 380                 for (height2 >>= picmip;height2 > gl_max_size.integer;height2 >>= 1);
 381                 for (depth2 >>= picmip;depth2 > gl_max_size.integer;depth2 >>= 1);
 382                 if (width2 < 1) width2 = 1;
 383                 if (height2 < 1) height2 = 1;
 384                 if (depth2 < 1) depth2 = 1;
 385
 386                 size = 0;
 387                 if (glt->flags & TEXF_MIPMAP)
 388                 {
 389                         while (width2 > 1 || height2 > 1 || depth2 > 1)
 390                         {
 391                                 size += width2 * height2 * depth2;
 392                                 if (width2 > 1)
 393                                         width2 >>= 1;
 394                                 if (height2 > 1)
 395                                         height2 >>= 1;
 396                                 if (depth2 > 1)
 397                                         depth2 >>= 1;
 398                         }
 399                         size++; // count the last 1x1 mipmap
 400                 }
 401                 else
 402                         size = width2 * height2 * depth2;
 403         }
 404         size *= glt->textype->internalbytesperpixel * glt->image->sides;
 405
 406         return size;
 407 }
 408
 409 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 410 {
 411         int glsize;
 412         int isloaded;
 413         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 414         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 415         gltexture_t *glt;
 416         gltexturepool_t *pool;
 417         if (printeach)
 418                 Con_Print("glsize input loaded mip alpha name\n");
 419         for (pool = gltexturepoolchain;pool;pool = pool->next)
 420         {
 421                 pooltotal = 0;
 422                 pooltotalt = 0;
 423                 pooltotalp = 0;
 424                 poolloaded = 0;
 425                 poolloadedt = 0;
 426                 poolloadedp = 0;
 427                 for (glt = pool->gltchain;glt;glt = glt->chain)
 428                 {
 429                         glsize = R_CalcTexelDataSize(glt);
 430                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 431                         pooltotal++;
 432                         pooltotalt += glsize;
 433                         pooltotalp += glt->inputdatasize;
 434                         if (isloaded)
 435                         {
 436                                 poolloaded++;
 437                                 poolloadedt += glsize;
 438                                 poolloadedp += glt->inputdatasize;
 439                         }
 440                         if (printeach)
 441                                 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);
 442                 }
 443                 if (printpool)
 444                         Con_Printf("texturepool %10p total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", pool, pooltotal, pooltotalt / 1048576.0, pooltotalp / 1048576.0, poolloaded, poolloadedt / 1048576.0, poolloadedp / 1048576.0, pooltotal - poolloaded, (pooltotalt - poolloadedt) / 1048576.0, (pooltotalp - poolloadedp) / 1048576.0);
 445                 sumtotal += pooltotal;
 446                 sumtotalt += pooltotalt;
 447                 sumtotalp += pooltotalp;
 448                 sumloaded += poolloaded;
 449                 sumloadedt += poolloadedt;
 450                 sumloadedp += poolloadedp;
 451         }
 452         if (printtotal)
 453                 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);
 454 }
 455
 456 static void R_TextureStats_f(void)
 457 {
 458         R_TextureStats_Print(true, true, true);
 459 }
 460
 461 char engineversion[40];
 462
 463 static void r_textures_start(void)
 464 {
 465         // deal with size limits of various drivers (3dfx in particular)
 466         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 467         CHECKGLERROR
 468         // LordHavoc: allow any alignment
 469         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 470         CHECKGLERROR
 471
 472         // use the largest scrap texture size we can (not sure if this is really a good idea)
 473         for (block_size = 1;block_size < realmaxsize && block_size < gl_max_scrapsize.integer;block_size <<= 1);
 474
 475         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 476
 477         // Disable JPEG screenshots if the DLL isn't loaded
 478         if (! JPEG_OpenLibrary ())
 479                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 480 }
 481
 482 static void r_textures_shutdown(void)
 483 {
 484         rtexturepool_t *temp;
 485
 486         JPEG_CloseLibrary ();
 487
 488         while(gltexturepoolchain)
 489         {
 490                 temp = (rtexturepool_t *) gltexturepoolchain;
 491                 R_FreeTexturePool(&temp);
 492         }
 493
 494         resizebuffersize = 0;
 495         texturebuffersize = 0;
 496         resizebuffer = NULL;
 497         colorconvertbuffer = NULL;
 498         texturebuffer = NULL;
 499         Mem_FreePool(&texturemempool);
 500 }
 501
 502 static void r_textures_newmap(void)
 503 {
 504 }
 505
 506 void R_Textures_Init (void)
 507 {
 508         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f);
 509         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 510         Cvar_RegisterVariable (&gl_max_scrapsize);
 511         Cvar_RegisterVariable (&gl_max_size);
 512         Cvar_RegisterVariable (&gl_picmip);
 513         Cvar_RegisterVariable (&r_lerpimages);
 514         Cvar_RegisterVariable (&r_precachetextures);
 515         Cvar_RegisterVariable (&gl_texture_anisotropy);
 516
 517         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 518 }
 519
 520 void R_Textures_Frame (void)
 521 {
 522         static int old_aniso = 0;
 523
 524         // could do procedural texture animation here, if we keep track of which
 525         // textures were accessed this frame...
 526
 527         // free the resize buffers
 528         resizebuffersize = 0;
 529         if (resizebuffer)
 530         {
 531                 Mem_Free(resizebuffer);
 532                 resizebuffer = NULL;
 533         }
 534         if (colorconvertbuffer)
 535         {
 536                 Mem_Free(colorconvertbuffer);
 537                 colorconvertbuffer = NULL;
 538         }
 539
 540         if (old_aniso != gl_texture_anisotropy.integer)
 541         {
 542                 gltextureimage_t *image;
 543                 gltexturepool_t *pool;
 544                 GLint oldbindtexnum;
 545
 546                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 547
 548                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 549
 550                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 551                 {
 552                         for (image = pool->imagechain;image;image = image->imagechain)
 553                         {
 554                                 // only update already uploaded images
 555                                 if (!(image->flags & GLTEXF_UPLOAD) && (image->flags & TEXF_MIPMAP))
 556                                 {
 557                                         qglGetIntegerv(gltexturetypebindingenums[image->texturetype], &oldbindtexnum);
 558
 559                                         qglBindTexture(gltexturetypeenums[image->texturetype], image->texnum);
 560                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 561
 562                                         qglBindTexture(gltexturetypeenums[image->texturetype], oldbindtexnum);
 563                                 }
 564                         }
 565                 }
 566         }
 567 }
 568
 569 void R_MakeResizeBufferBigger(int size)
 570 {
 571         if (resizebuffersize < size)
 572         {
 573                 resizebuffersize = size;
 574                 if (resizebuffer)
 575                         Mem_Free(resizebuffer);
 576                 if (colorconvertbuffer)
 577                         Mem_Free(colorconvertbuffer);
 578                 resizebuffer = Mem_Alloc(texturemempool, resizebuffersize);
 579                 colorconvertbuffer = Mem_Alloc(texturemempool, resizebuffersize);
 580                 if (!resizebuffer || !colorconvertbuffer)
 581                         Host_Error("R_Upload: out of memory\n");
 582         }
 583 }
 584
 585 static void GL_SetupTextureParameters(int flags, int texturetype)
 586 {
 587         int textureenum = gltexturetypeenums[texturetype];
 588         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 589
 590         CHECKGLERROR
 591
 592         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 593         {
 594                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 595                 if (gl_texture_anisotropy.integer != aniso)
 596                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 597                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 598         }
 599         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 600         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 601         if (gltexturetypedimensions[texturetype] >= 3)
 602         {
 603                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 604         }
 605
 606         CHECKGLERROR
 607         if (flags & TEXF_FORCENEAREST)
 608         {
 609                 if (flags & TEXF_MIPMAP)
 610                 {
 611                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 612                 }
 613                 else
 614                 {
 615                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 616                 }
 617                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 618         }
 619         else if (flags & TEXF_FORCELINEAR)
 620         {
 621                 if (flags & TEXF_MIPMAP)
 622                 {
 623                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 624                         {
 625                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 626                         }
 627                         else
 628                         {
 629                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 630                         }
 631                 }
 632                 else
 633                 {
 634                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 635                 }
 636                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 637         }
 638         else
 639         {
 640                 if (flags & TEXF_MIPMAP)
 641                 {
 642                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 643                 }
 644                 else
 645                 {
 646                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 647                 }
 648                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 649         }
 650
 651         CHECKGLERROR
 652 }
 653
 654 static void R_Upload(gltexture_t *glt, qbyte *data)
 655 {
 656         int i, mip, width, height, depth;
 657         GLint oldbindtexnum;
 658         qbyte *prevbuffer;
 659         prevbuffer = data;
 660
 661         CHECKGLERROR
 662
 663         glt->texnum = glt->image->texnum;
 664         // we need to restore the texture binding after finishing the upload
 665         qglGetIntegerv(gltexturetypebindingenums[glt->image->texturetype], &oldbindtexnum);
 666         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 667         CHECKGLERROR
 668         glt->flags &= ~GLTEXF_UPLOAD;
 669
 670         if (glt->flags & TEXF_FRAGMENT)
 671         {
 672                 if (glt->image->flags & GLTEXF_UPLOAD)
 673                 {
 674                         glt->image->flags &= ~GLTEXF_UPLOAD;
 675                         Con_DPrint("uploaded new fragments image\n");
 676                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 677                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 678                         switch(glt->image->texturetype)
 679                         {
 680                         case GLTEXTURETYPE_1D:
 681                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 682                                 CHECKGLERROR
 683                                 break;
 684                         case GLTEXTURETYPE_2D:
 685                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 686                                 CHECKGLERROR
 687                                 break;
 688                         case GLTEXTURETYPE_3D:
 689                                 qglTexImage3D(GL_TEXTURE_3D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, glt->image->depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 690                                 CHECKGLERROR
 691                                 break;
 692                         default:
 693                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 694                                 break;
 695                         }
 696                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 697                 }
 698
 699                 if (prevbuffer == NULL)
 700                 {
 701                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 702                         memset(resizebuffer, 0, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 703                         prevbuffer = resizebuffer;
 704                 }
 705                 else if (glt->textype->textype == TEXTYPE_PALETTE)
 706                 {
 707                         // promote paletted to RGBA, so we only have to worry about RGB and
 708                         // RGBA in the rest of this code
 709                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
 710                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
 711                         prevbuffer = colorconvertbuffer;
 712                 }
 713
 714                 switch(glt->image->texturetype)
 715                 {
 716                 case GLTEXTURETYPE_1D:
 717                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 718                         CHECKGLERROR
 719                         break;
 720                 case GLTEXTURETYPE_2D:
 721                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 722                         CHECKGLERROR
 723                         break;
 724                 case GLTEXTURETYPE_3D:
 725                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 726                         CHECKGLERROR
 727                         break;
 728                 default:
 729                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D\n");
 730                         break;
 731                 }
 732         }
 733         else
 734         {
 735                 glt->image->flags &= ~GLTEXF_UPLOAD;
 736
 737                 // these are rounded up versions of the size to do better resampling
 738                 for (width  = 1;width  < glt->width ;width  <<= 1);
 739                 for (height = 1;height < glt->height;height <<= 1);
 740                 for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 741
 742                 R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
 743
 744                 if (prevbuffer == NULL)
 745                 {
 746                         width = glt->image->width;
 747                         height = glt->image->height;
 748                         depth = glt->image->depth;
 749                         memset(resizebuffer, 0, width * height * depth * glt->image->bytesperpixel);
 750                         prevbuffer = resizebuffer;
 751                 }
 752                 else
 753                 {
 754                         if (glt->textype->textype == TEXTYPE_PALETTE)
 755                         {
 756                                 // promote paletted to RGBA, so we only have to worry about RGB and
 757                                 // RGBA in the rest of this code
 758                                 Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
 759                                 prevbuffer = colorconvertbuffer;
 760                         }
 761                 }
 762
 763                 // cubemaps contain multiple images and thus get processed a bit differently
 764                 if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
 765                 {
 766                         if (glt->width != width || glt->height != height || glt->depth != depth)
 767                         {
 768                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 769                                 prevbuffer = resizebuffer;
 770                         }
 771                         // picmip/max_size
 772                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 773                         {
 774                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 775                                 prevbuffer = resizebuffer;
 776                         }
 777                 }
 778                 mip = 0;
 779                 switch(glt->image->texturetype)
 780                 {
 781                 case GLTEXTURETYPE_1D:
 782                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 783                         CHECKGLERROR
 784                         if (glt->flags & TEXF_MIPMAP)
 785                         {
 786                                 while (width > 1 || height > 1 || depth > 1)
 787                                 {
 788                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 789                                         prevbuffer = resizebuffer;
 790                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 791                                         CHECKGLERROR
 792                                 }
 793                         }
 794                         break;
 795                 case GLTEXTURETYPE_2D:
 796                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 797                         CHECKGLERROR
 798                         if (glt->flags & TEXF_MIPMAP)
 799                         {
 800                                 while (width > 1 || height > 1 || depth > 1)
 801                                 {
 802                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 803                                         prevbuffer = resizebuffer;
 804                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 805                                         CHECKGLERROR
 806                                 }
 807                         }
 808                         break;
 809                 case GLTEXTURETYPE_3D:
 810                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 811                         CHECKGLERROR
 812                         if (glt->flags & TEXF_MIPMAP)
 813                         {
 814                                 while (width > 1 || height > 1 || depth > 1)
 815                                 {
 816                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 817                                         prevbuffer = resizebuffer;
 818                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 819                                         CHECKGLERROR
 820                                 }
 821                         }
 822                         break;
 823                 case GLTEXTURETYPE_CUBEMAP:
 824                         // convert and upload each side in turn,
 825                         // from a continuous block of input texels
 826                         texturebuffer = prevbuffer;
 827                         for (i = 0;i < 6;i++)
 828                         {
 829                                 prevbuffer = texturebuffer;
 830                                 texturebuffer += glt->width * glt->height * glt->depth * glt->textype->inputbytesperpixel;
 831                                 if (glt->width != width || glt->height != height || glt->depth != depth)
 832                                 {
 833                                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 834                                         prevbuffer = resizebuffer;
 835                                 }
 836                                 // picmip/max_size
 837                                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 838                                 {
 839                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 840                                         prevbuffer = resizebuffer;
 841                                 }
 842                                 mip = 0;
 843                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 844                                 CHECKGLERROR
 845                                 if (glt->flags & TEXF_MIPMAP)
 846                                 {
 847                                         while (width > 1 || height > 1 || depth > 1)
 848                                         {
 849                                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 850                                                 prevbuffer = resizebuffer;
 851                                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 852                                                 CHECKGLERROR
 853                                         }
 854                                 }
 855                         }
 856                         break;
 857                 }
 858                 GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 859         }
 860         qglBindTexture(gltexturetypeenums[glt->image->texturetype], oldbindtexnum);
 861 }
 862
 863 static void R_FindImageForTexture(gltexture_t *glt)
 864 {
 865         int i, j, best, best2, x, y, z, w, h, d, picmip;
 866         textypeinfo_t *texinfo;
 867         gltexturepool_t *pool;
 868         gltextureimage_t *image, **imagechainpointer;
 869         texinfo = glt->textype;
 870         pool = glt->pool;
 871
 872         // remains -1 until uploaded
 873         glt->texnum = -1;
 874
 875         x = 0;
 876         y = 0;
 877         z = 0;
 878         w = glt->width;
 879         h = glt->height;
 880         d = glt->depth;
 881         if (glt->flags & TEXF_FRAGMENT)
 882         {
 883                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 884                 {
 885                         image = *imagechainpointer;
 886                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 887                                 continue;
 888                         if (image->texturetype != glt->texturetype)
 889                                 continue;
 890                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP | TEXF_FORCENEAREST | TEXF_FORCELINEAR))
 891                                 continue;
 892                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 893                                 continue;
 894                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 895                                 continue;
 896
 897                         // got a fragments texture, find a place in it if we can
 898                         for (best = image->width, i = 0;i < image->width - w;i++)
 899                         {
 900                                 for (best2 = 0, j = 0;j < w;j++)
 901                                 {
 902                                         if (image->blockallocation[i+j] >= best)
 903                                                 break;
 904                                         if (best2 < image->blockallocation[i+j])
 905                                                 best2 = image->blockallocation[i+j];
 906                                 }
 907                                 if (j == w)
 908                                 {
 909                                         // this is a valid spot
 910                                         x = i;
 911                                         y = best = best2;
 912                                 }
 913                         }
 914
 915                         if (best + h > image->height)
 916                                 continue;
 917
 918                         for (i = 0;i < w;i++)
 919                                 image->blockallocation[x + i] = best + h;
 920
 921                         glt->x = x;
 922                         glt->y = y;
 923                         glt->z = 0;
 924                         glt->image = image;
 925                         image->texturecount++;
 926                         return;
 927                 }
 928
 929                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 930                 if (image == NULL)
 931                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 932                 image->type = GLIMAGETYPE_FRAGMENTS;
 933                 // make sure the created image is big enough for the fragment
 934                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 935                 image->height = 1;
 936                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 937                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 938                 image->depth = 1;
 939                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 940                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 941                 image->blockallocation = Mem_Alloc(texturemempool, image->width * sizeof(short));
 942                 memset(image->blockallocation, 0, image->width * sizeof(short));
 943
 944                 x = 0;
 945                 y = 0;
 946                 z = 0;
 947                 for (i = 0;i < w;i++)
 948                         image->blockallocation[x + i] = y + h;
 949         }
 950         else
 951         {
 952                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 953
 954                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 955                 if (image == NULL)
 956                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 957                 image->type = GLIMAGETYPE_TILE;
 958                 image->blockallocation = NULL;
 959
 960                 picmip = 0;
 961                 if (glt->flags & TEXF_PICMIP)
 962                         picmip = gl_picmip.integer;
 963                 // calculate final size
 964                 if (gl_max_size.integer > realmaxsize)
 965                         Cvar_SetValue("gl_max_size", realmaxsize);
 966                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 967                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 968                 for (image->depth = 1;image->depth < glt->depth;image->depth <<= 1);
 969                 for (image->width >>= picmip;image->width > gl_max_size.integer;image->width >>= 1);
 970                 for (image->height >>= picmip;image->height > gl_max_size.integer;image->height >>= 1);
 971                 for (image->depth >>= picmip;image->depth > gl_max_size.integer;image->depth >>= 1);
 972                 if (image->width < 1) image->width = 1;
 973                 if (image->height < 1) image->height = 1;
 974                 if (image->depth < 1) image->depth = 1;
 975         }
 976         image->texturetype = glt->texturetype;
 977         image->glinternalformat = texinfo->glinternalformat;
 978         image->glformat = texinfo->glformat;
 979         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP | TEXF_PICMIP | TEXF_FORCENEAREST | TEXF_FORCELINEAR)) | GLTEXF_UPLOAD;
 980         image->bytesperpixel = texinfo->internalbytesperpixel;
 981         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
 982         // get a texture number to use
 983         qglGenTextures(1, &image->texnum);
 984         *imagechainpointer = image;
 985         image->texturecount++;
 986
 987         glt->x = x;
 988         glt->y = y;
 989         glt->y = z;
 990         glt->image = image;
 991 }
 992
 993 // note: R_FindImageForTexture must be called before this
 994 static void R_UploadTexture (gltexture_t *glt)
 995 {
 996         if (!(glt->flags & GLTEXF_UPLOAD))
 997                 return;
 998
 999         R_Upload(glt, glt->inputtexels);
1000         if (glt->inputtexels)
1001         {
1002                 Mem_Free(glt->inputtexels);
1003                 glt->inputtexels = NULL;
1004                 glt->flags |= GLTEXF_DESTROYED;
1005         }
1006         else if (glt->flags & GLTEXF_DESTROYED)
1007                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
1008 }
1009
1010 static rtexture_t *R_SetupTexture(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, int sides, int flags, int textype, int texturetype, const qbyte *data, const unsigned int *palette)
1011 {
1012         int i, size;
1013         gltexture_t *glt;
1014         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1015         textypeinfo_t *texinfo;
1016
1017         if (cls.state == ca_dedicated)
1018                 return NULL;
1019
1020         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
1021                 Sys_Error("R_LoadTexture: only 2D fragment textures implemented\n");
1022         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
1023                 Sys_Error("R_LoadTexture: cubemap texture not supported by driver\n");
1024         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
1025                 Sys_Error("R_LoadTexture: 3d texture not supported by driver\n");
1026
1027         texinfo = R_GetTexTypeInfo(textype, flags);
1028         size = width * height * depth * sides * texinfo->inputbytesperpixel;
1029         if (size < 1)
1030                 Sys_Error("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
1031
1032         // clear the alpha flag if the texture has no transparent pixels
1033         switch(textype)
1034         {
1035         case TEXTYPE_PALETTE:
1036                 if (flags & TEXF_ALPHA)
1037                 {
1038                         flags &= ~TEXF_ALPHA;
1039                         if (data)
1040                         {
1041                                 for (i = 0;i < size;i++)
1042                                 {
1043                                         if (((qbyte *)&palette[data[i]])[3] < 255)
1044                                         {
1045                                                 flags |= TEXF_ALPHA;
1046                                                 break;
1047                                         }
1048                                 }
1049                         }
1050                 }
1051                 break;
1052         case TEXTYPE_RGB:
1053                 if (flags & TEXF_ALPHA)
1054                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
1055                 break;
1056         case TEXTYPE_RGBA:
1057                 if (flags & TEXF_ALPHA)
1058                 {
1059                         flags &= ~TEXF_ALPHA;
1060                         if (data)
1061                         {
1062                                 for (i = 3;i < size;i += 4)
1063                                 {
1064                                         if (data[i] < 255)
1065                                         {
1066                                                 flags |= TEXF_ALPHA;
1067                                                 break;
1068                                         }
1069                                 }
1070                         }
1071                 }
1072                 break;
1073         case TEXTYPE_DSDT:
1074                 break;
1075         default:
1076                 Host_Error("R_LoadTexture: unknown texture type\n");
1077         }
1078
1079         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1080         if (identifier)
1081                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1082         glt->pool = pool;
1083         glt->chain = pool->gltchain;
1084         pool->gltchain = glt;
1085         glt->width = width;
1086         glt->height = height;
1087         glt->depth = depth;
1088         glt->flags = flags | GLTEXF_UPLOAD;
1089         glt->textype = texinfo;
1090         glt->texturetype = texturetype;
1091         glt->inputdatasize = size;
1092         glt->palette = palette;
1093
1094         if (data)
1095         {
1096                 glt->inputtexels = Mem_Alloc(texturemempool, size);
1097                 if (glt->inputtexels == NULL)
1098                         Sys_Error("R_LoadTexture: out of memory\n");
1099                 memcpy(glt->inputtexels, data, size);
1100         }
1101         else
1102                 glt->inputtexels = NULL;
1103
1104         R_FindImageForTexture(glt);
1105         R_PrecacheTexture(glt);
1106
1107         return (rtexture_t *)glt;
1108 }
1109
1110 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1111 {
1112         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1113 }
1114
1115 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const qbyte *data, int textype, int flags, const unsigned int *palette)
1116 {
1117         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1118 }
1119
1120 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const qbyte *data, int textype, int flags, const unsigned int *palette)
1121 {
1122         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1123 }
1124
1125 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const qbyte *data, int textype, int flags, const unsigned int *palette)
1126 {
1127         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1128 }
1129
1130 int R_TextureHasAlpha(rtexture_t *rt)
1131 {
1132         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1133 }
1134
1135 int R_TextureWidth(rtexture_t *rt)
1136 {
1137         return rt ? ((gltexture_t *)rt)->width : 0;
1138 }
1139
1140 int R_TextureHeight(rtexture_t *rt)
1141 {
1142         return rt ? ((gltexture_t *)rt)->height : 0;
1143 }
1144
1145 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1146 {
1147         gltexture_t *glt;
1148         float iwidth, iheight, idepth;
1149         if (cls.state == ca_dedicated)
1150         {
1151                 if (x)
1152                         *x = 0;
1153                 if (y)
1154                         *y = 0;
1155                 if (z)
1156                         *z = 0;
1157                 if (fx1 || fy1 || fx2 || fy2)
1158                 {
1159                         if (fx1)
1160                                 *fx1 = 0;
1161                         if (fy1)
1162                                 *fy1 = 0;
1163                         if (fz1)
1164                                 *fz1 = 0;
1165                         if (fx2)
1166                                 *fx2 = 1;
1167                         if (fy2)
1168                                 *fy2 = 1;
1169                         if (fz2)
1170                                 *fz2 = 1;
1171                 }
1172                 return;
1173         }
1174         if (!rt)
1175                 Host_Error("R_FragmentLocation: no texture supplied\n");
1176         glt = (gltexture_t *)rt;
1177         if (glt->flags & TEXF_FRAGMENT)
1178         {
1179                 if (x)
1180                         *x = glt->x;
1181                 if (y)
1182                         *y = glt->y;
1183                 if (fx1 || fy1 || fx2 || fy2)
1184                 {
1185                         iwidth = 1.0f / glt->image->width;
1186                         iheight = 1.0f / glt->image->height;
1187                         idepth = 1.0f / glt->image->depth;
1188                         if (fx1)
1189                                 *fx1 = glt->x * iwidth;
1190                         if (fy1)
1191                                 *fy1 = glt->y * iheight;
1192                         if (fz1)
1193                                 *fz1 = glt->z * idepth;
1194                         if (fx2)
1195                                 *fx2 = (glt->x + glt->width) * iwidth;
1196                         if (fy2)
1197                                 *fy2 = (glt->y + glt->height) * iheight;
1198                         if (fz2)
1199                                 *fz2 = (glt->z + glt->depth) * idepth;
1200                 }
1201         }
1202         else
1203         {
1204                 if (x)
1205                         *x = 0;
1206                 if (y)
1207                         *y = 0;
1208                 if (z)
1209                         *z = 0;
1210                 if (fx1 || fy1 || fx2 || fy2)
1211                 {
1212                         if (fx1)
1213                                 *fx1 = 0;
1214                         if (fy1)
1215                                 *fy1 = 0;
1216                         if (fz1)
1217                                 *fz1 = 0;
1218                         if (fx2)
1219                                 *fx2 = 1;
1220                         if (fy2)
1221                                 *fy2 = 1;
1222                         if (fz2)
1223                                 *fz2 = 1;
1224                 }
1225         }
1226 }
1227
1228 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1229 {
1230         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1231 }
1232
1233 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1234 {
1235         return width;
1236 }
1237
1238 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1239 {
1240         gltexture_t *glt;
1241         if (rt == NULL)
1242                 Host_Error("R_UpdateTexture: no texture supplied\n");
1243         if (data == NULL)
1244                 Host_Error("R_UpdateTexture: no data supplied\n");
1245         glt = (gltexture_t *)rt;
1246
1247         // if it has not been uploaded yet, update the data that will be used when it is
1248         if (glt->inputtexels)
1249                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1250         else
1251                 R_Upload(glt, data);
1252 }
1253