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_max_scrapsize = {CVAR_SAVE, "gl_max_scrapsize", "256", "size of scrap textures used to combine lightmaps"};
   9 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%"};
  10 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)"};
  11 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)"};
  12 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"};
  13
  14 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  15 int             gl_filter_mag = GL_LINEAR;
  16
  17
  18 static mempool_t *texturemempool;
  19
  20 // note: this must not conflict with TEXF_ flags in r_textures.h
  21 // cleared when a texture is uploaded
  22 #define GLTEXF_UPLOAD 0x00010000
  23 // bitmask for mismatch checking
  24 #define GLTEXF_IMPORTANTBITS (0)
  25 // set when image is uploaded and freed
  26 #define GLTEXF_DESTROYED 0x00040000
  27
  28 // size of images which hold fragment textures, ignores picmip and max_size
  29 static int block_size;
  30
  31 typedef struct textypeinfo_s
  32 {
  33         int textype;
  34         int inputbytesperpixel;
  35         int internalbytesperpixel;
  36         int glformat;
  37         int glinternalformat;
  38 }
  39 textypeinfo_t;
  40
  41 static textypeinfo_t textype_palette       = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 3};
  42 static textypeinfo_t textype_rgb           = {TEXTYPE_RGB    , 3, 3, GL_RGB    , 3};
  43 static textypeinfo_t textype_rgba          = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 3};
  44 static textypeinfo_t textype_palette_alpha = {TEXTYPE_PALETTE, 1, 4, GL_RGBA   , 4};
  45 static textypeinfo_t textype_rgba_alpha    = {TEXTYPE_RGBA   , 4, 4, GL_RGBA   , 4};
  46 static textypeinfo_t textype_dsdt          = {TEXTYPE_DSDT   , 2, 2, GL_DSDT_NV, GL_DSDT8_NV};
  47
  48 // a tiling texture (most common type)
  49 #define GLIMAGETYPE_TILE 0
  50 // a fragments texture (contains one or more fragment textures)
  51 #define GLIMAGETYPE_FRAGMENTS 1
  52
  53 #define GLTEXTURETYPE_1D 0
  54 #define GLTEXTURETYPE_2D 1
  55 #define GLTEXTURETYPE_3D 2
  56 #define GLTEXTURETYPE_CUBEMAP 3
  57
  58 static int gltexturetypeenums[4] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB};
  59 static int gltexturetypebindingenums[4] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB};
  60 static int gltexturetypedimensions[4] = {1, 2, 3, 2};
  61 static int cubemapside[6] =
  62 {
  63         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
  64         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
  65         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
  66         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
  67         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
  68         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
  69 };
  70
  71 // a gltextureimage can have one (or more if fragments) gltextures inside
  72 typedef struct gltextureimage_s
  73 {
  74         struct gltextureimage_s *imagechain;
  75         int texturecount;
  76         int type; // one of the GLIMAGETYPE_ values
  77         int texturetype; // one of the GLTEXTURETYPE_ values
  78         int sides; // 1 or 6 depending on texturetype
  79         int texnum; // GL texture slot number
  80         int width, height, depth; // 3D texture support
  81         int bytesperpixel; // bytes per pixel
  82         int glformat; // GL_RGB or GL_RGBA
  83         int glinternalformat; // 3 or 4
  84         int flags;
  85         short *blockallocation; // fragment allocation (2D only)
  86 }
  87 gltextureimage_t;
  88
  89 typedef struct gltexture_s
  90 {
  91         // this field is exposed to the R_GetTexture macro, for speed reasons
  92         // (must be identical in rtexture_t)
  93         int texnum; // GL texture slot number
  94
  95         // pointer to texturepool (check this to see if the texture is allocated)
  96         struct gltexturepool_s *pool;
  97         // pointer to next texture in texturepool chain
  98         struct gltexture_s *chain;
  99         // pointer into gltextureimage array
 100         gltextureimage_t *image;
 101         // name of the texture (this might be removed someday), no duplicates
 102         char identifier[32];
 103         // location in the image, and size
 104         int x, y, z, width, height, depth;
 105         // copy of the original texture(s) supplied to the upload function, for
 106         // delayed uploads (non-precached)
 107         unsigned char *inputtexels;
 108         // original data size in *inputtexels
 109         int inputdatasize;
 110         // flags supplied to the LoadTexture function
 111         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
 112         int flags;
 113         // pointer to one of the textype_ structs
 114         textypeinfo_t *textype;
 115         // one of the GLTEXTURETYPE_ values
 116         int texturetype;
 117         // palette if the texture is TEXTYPE_PALETTE
 118         const unsigned int *palette;
 119 }
 120 gltexture_t;
 121
 122 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 123
 124 typedef struct gltexturepool_s
 125 {
 126         unsigned int sentinel;
 127         struct gltextureimage_s *imagechain;
 128         struct gltexture_s *gltchain;
 129         struct gltexturepool_s *next;
 130 }
 131 gltexturepool_t;
 132
 133 static gltexturepool_t *gltexturepoolchain = NULL;
 134
 135 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
 136 static int resizebuffersize = 0;
 137 static unsigned char *texturebuffer;
 138 static int texturebuffersize = 0;
 139
 140 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 141 {
 142         if ((flags & (TEXF_PICMIP | TEXF_FRAGMENT)) == (TEXF_PICMIP | TEXF_FRAGMENT))
 143         {
 144                 Host_Error("R_GetTexTypeInfo: TEXF_PICMIP can not be used with TEXF_FRAGMENT");
 145                 return NULL;
 146         }
 147         if (flags & TEXF_ALPHA)
 148         {
 149                 switch(textype)
 150                 {
 151                 case TEXTYPE_PALETTE:
 152                         return &textype_palette_alpha;
 153                 case TEXTYPE_RGB:
 154                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed");
 155                         return NULL;
 156                 case TEXTYPE_RGBA:
 157                         return &textype_rgba_alpha;
 158                 default:
 159                         Host_Error("R_GetTexTypeInfo: unknown texture format");
 160                         return NULL;
 161                 }
 162         }
 163         else
 164         {
 165                 switch(textype)
 166                 {
 167                 case TEXTYPE_PALETTE:
 168                         return &textype_palette;
 169                 case TEXTYPE_RGB:
 170                         return &textype_rgb;
 171                 case TEXTYPE_RGBA:
 172                         return &textype_rgba;
 173                 case TEXTYPE_DSDT:
 174                         return &textype_dsdt;
 175                 default:
 176                         Host_Error("R_GetTexTypeInfo: unknown texture format");
 177                         return NULL;
 178                 }
 179         }
 180 }
 181
 182 static void R_UploadTexture(gltexture_t *t);
 183
 184 static void R_PrecacheTexture(gltexture_t *glt)
 185 {
 186         int precache;
 187         precache = false;
 188         if (glt->flags & TEXF_ALWAYSPRECACHE)
 189                 precache = true;
 190         else if (r_precachetextures.integer >= 2)
 191                 precache = true;
 192         else if (r_precachetextures.integer >= 1)
 193                 if (glt->flags & TEXF_PRECACHE)
 194                         precache = true;
 195
 196         if (precache)
 197                 R_UploadTexture(glt);
 198 }
 199
 200 int R_RealGetTexture(rtexture_t *rt)
 201 {
 202         if (rt)
 203         {
 204                 gltexture_t *glt;
 205                 glt = (gltexture_t *)rt;
 206                 if (glt->flags & GLTEXF_UPLOAD)
 207                         R_UploadTexture(glt);
 208                 glt->texnum = glt->image->texnum;
 209                 return glt->image->texnum;
 210         }
 211         else
 212                 return 0;
 213 }
 214
 215 void R_FreeTexture(rtexture_t *rt)
 216 {
 217         gltexture_t *glt, **gltpointer;
 218         gltextureimage_t *image, **gltimagepointer;
 219
 220         glt = (gltexture_t *)rt;
 221         if (glt == NULL)
 222                 Host_Error("R_FreeTexture: texture == NULL");
 223
 224         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 225         if (*gltpointer == glt)
 226                 *gltpointer = glt->chain;
 227         else
 228                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
 229
 230         // note: if freeing a fragment texture, this will not make the claimed
 231         // space available for new textures unless all other fragments in the
 232         // image are also freed
 233         if (glt->image)
 234         {
 235                 image = glt->image;
 236                 image->texturecount--;
 237                 if (image->texturecount < 1)
 238                 {
 239                         for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 240                         if (*gltimagepointer == image)
 241                                 *gltimagepointer = image->imagechain;
 242                         else
 243                                 Host_Error("R_FreeTexture: image not linked in pool");
 244                         if (image->texnum)
 245                                 qglDeleteTextures(1, (GLuint *)&image->texnum);
 246                         if (image->blockallocation)
 247                                 Mem_Free(image->blockallocation);
 248                         Mem_Free(image);
 249                 }
 250         }
 251
 252         if (glt->inputtexels)
 253                 Mem_Free(glt->inputtexels);
 254         Mem_Free(glt);
 255 }
 256
 257 rtexturepool_t *R_AllocTexturePool(void)
 258 {
 259         gltexturepool_t *pool;
 260         if (texturemempool == NULL)
 261                 return NULL;
 262         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 263         if (pool == NULL)
 264                 return NULL;
 265         pool->next = gltexturepoolchain;
 266         gltexturepoolchain = pool;
 267         pool->sentinel = TEXTUREPOOL_SENTINEL;
 268         return (rtexturepool_t *)pool;
 269 }
 270
 271 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 272 {
 273         gltexturepool_t *pool, **poolpointer;
 274         if (rtexturepool == NULL)
 275                 return;
 276         if (*rtexturepool == NULL)
 277                 return;
 278         pool = (gltexturepool_t *)(*rtexturepool);
 279         *rtexturepool = NULL;
 280         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 281                 Host_Error("R_FreeTexturePool: pool already freed");
 282         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 283         if (*poolpointer == pool)
 284                 *poolpointer = pool->next;
 285         else
 286                 Host_Error("R_FreeTexturePool: pool not linked");
 287         while (pool->gltchain)
 288                 R_FreeTexture((rtexture_t *)pool->gltchain);
 289         if (pool->imagechain)
 290                 Con_Printf("R_FreeTexturePool: not all images freed\n");
 291         Mem_Free(pool);
 292 }
 293
 294
 295 typedef struct glmode_s
 296 {
 297         char *name;
 298         int minification, magnification;
 299 }
 300 glmode_t;
 301
 302 static glmode_t modes[] =
 303 {
 304         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 305         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 306         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 307         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 308         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 309         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 310 };
 311
 312 static void GL_TextureMode_f (void)
 313 {
 314         int i;
 315         GLint oldbindtexnum;
 316         gltextureimage_t *image;
 317         gltexturepool_t *pool;
 318
 319         if (Cmd_Argc() == 1)
 320         {
 321                 for (i = 0;i < 6;i++)
 322                 {
 323                         if (gl_filter_min == modes[i].minification)
 324                         {
 325                                 Con_Printf("%s\n", modes[i].name);
 326                                 return;
 327                         }
 328                 }
 329                 Con_Print("current filter is unknown???\n");
 330                 return;
 331         }
 332
 333         for (i = 0;i < 6;i++)
 334                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 335                         break;
 336         if (i == 6)
 337         {
 338                 Con_Print("bad filter name\n");
 339                 return;
 340         }
 341
 342         gl_filter_min = modes[i].minification;
 343         gl_filter_mag = modes[i].magnification;
 344
 345         // change all the existing mipmap texture objects
 346         // FIXME: force renderer(/client/something?) restart instead?
 347         for (pool = gltexturepoolchain;pool;pool = pool->next)
 348         {
 349                 for (image = pool->imagechain;image;image = image->imagechain)
 350                 {
 351                         // only update already uploaded images
 352                         if (!(image->flags & GLTEXF_UPLOAD) && !(image->flags & (TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
 353                         {
 354                                 qglGetIntegerv(gltexturetypebindingenums[image->texturetype], &oldbindtexnum);
 355                                 qglBindTexture(gltexturetypeenums[image->texturetype], image->texnum);
 356                                 if (image->flags & TEXF_MIPMAP)
 357                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);
 358                                 else
 359                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 360                                 qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 361                                 qglBindTexture(gltexturetypeenums[image->texturetype], oldbindtexnum);
 362                         }
 363                 }
 364         }
 365 }
 366
 367 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
 368 {
 369         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
 370
 371         if (gl_max_size.integer > gl_max_texture_size)
 372                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
 373
 374         switch (texturetype)
 375         {
 376         default:
 377         case GLTEXTURETYPE_1D:
 378         case GLTEXTURETYPE_2D:
 379                 maxsize = gl_max_texture_size;
 380                 break;
 381         case GLTEXTURETYPE_3D:
 382                 maxsize = gl_max_3d_texture_size;
 383                 break;
 384         case GLTEXTURETYPE_CUBEMAP:
 385                 maxsize = gl_max_cube_map_texture_size;
 386                 break;
 387         }
 388
 389         if (flags & TEXF_PICMIP)
 390         {
 391                 maxsize = min(maxsize, gl_max_size.integer);
 392                 picmip = gl_picmip.integer;
 393         }
 394
 395         if (outwidth)
 396         {
 397                 for (width2 = 1;width2 < inwidth;width2 <<= 1);
 398                 for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
 399                 *outwidth = max(1, width2);
 400         }
 401         if (outheight)
 402         {
 403                 for (height2 = 1;height2 < inheight;height2 <<= 1);
 404                 for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
 405                 *outheight = max(1, height2);
 406         }
 407         if (outdepth)
 408         {
 409                 for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
 410                 for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
 411                 *outdepth = max(1, depth2);
 412         }
 413 }
 414
 415
 416 static int R_CalcTexelDataSize (gltexture_t *glt)
 417 {
 418         int width2, height2, depth2, size;
 419
 420         if (glt->flags & TEXF_FRAGMENT)
 421                 return glt->width * glt->height * glt->depth * glt->textype->internalbytesperpixel * glt->image->sides;
 422
 423         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->width, glt->height, glt->depth, &width2, &height2, &depth2);
 424
 425         size = width2 * height2 * depth2;
 426
 427         if (glt->flags & TEXF_MIPMAP)
 428         {
 429                 while (width2 > 1 || height2 > 1 || depth2 > 1)
 430                 {
 431                         if (width2 > 1)
 432                                 width2 >>= 1;
 433                         if (height2 > 1)
 434                                 height2 >>= 1;
 435                         if (depth2 > 1)
 436                                 depth2 >>= 1;
 437                         size += width2 * height2 * depth2;
 438                 }
 439         }
 440
 441         return size * glt->textype->internalbytesperpixel * glt->image->sides;
 442 }
 443
 444 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
 445 {
 446         int glsize;
 447         int isloaded;
 448         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
 449         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
 450         gltexture_t *glt;
 451         gltexturepool_t *pool;
 452         if (printeach)
 453                 Con_Print("glsize input loaded mip alpha name\n");
 454         for (pool = gltexturepoolchain;pool;pool = pool->next)
 455         {
 456                 pooltotal = 0;
 457                 pooltotalt = 0;
 458                 pooltotalp = 0;
 459                 poolloaded = 0;
 460                 poolloadedt = 0;
 461                 poolloadedp = 0;
 462                 for (glt = pool->gltchain;glt;glt = glt->chain)
 463                 {
 464                         glsize = R_CalcTexelDataSize(glt);
 465                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
 466                         pooltotal++;
 467                         pooltotalt += glsize;
 468                         pooltotalp += glt->inputdatasize;
 469                         if (isloaded)
 470                         {
 471                                 poolloaded++;
 472                                 poolloadedt += glsize;
 473                                 poolloadedp += glt->inputdatasize;
 474                         }
 475                         if (printeach)
 476                                 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);
 477                 }
 478                 if (printpool)
 479                         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);
 480                 sumtotal += pooltotal;
 481                 sumtotalt += pooltotalt;
 482                 sumtotalp += pooltotalp;
 483                 sumloaded += poolloaded;
 484                 sumloadedt += poolloadedt;
 485                 sumloadedp += poolloadedp;
 486         }
 487         if (printtotal)
 488                 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);
 489 }
 490
 491 static void R_TextureStats_f(void)
 492 {
 493         R_TextureStats_Print(true, true, true);
 494 }
 495
 496 static void r_textures_start(void)
 497 {
 498         // LordHavoc: allow any alignment
 499         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 500         CHECKGLERROR
 501
 502         // use the largest scrap texture size we can (not sure if this is really a good idea)
 503         for (block_size = 1;block_size * 2 <= gl_max_texture_size && block_size * 2 <= gl_max_scrapsize.integer;block_size *= 2);
 504
 505         texturemempool = Mem_AllocPool("texture management", 0, NULL);
 506
 507         // Disable JPEG screenshots if the DLL isn't loaded
 508         if (! JPEG_OpenLibrary ())
 509                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
 510         // TODO: support png screenshots?
 511         PNG_OpenLibrary ();
 512 }
 513
 514 static void r_textures_shutdown(void)
 515 {
 516         rtexturepool_t *temp;
 517
 518         JPEG_CloseLibrary ();
 519
 520         while(gltexturepoolchain)
 521         {
 522                 temp = (rtexturepool_t *) gltexturepoolchain;
 523                 R_FreeTexturePool(&temp);
 524         }
 525
 526         resizebuffersize = 0;
 527         texturebuffersize = 0;
 528         resizebuffer = NULL;
 529         colorconvertbuffer = NULL;
 530         texturebuffer = NULL;
 531         Mem_FreePool(&texturemempool);
 532 }
 533
 534 static void r_textures_newmap(void)
 535 {
 536 }
 537
 538 void R_Textures_Init (void)
 539 {
 540         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
 541         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
 542         Cvar_RegisterVariable (&gl_max_scrapsize);
 543         Cvar_RegisterVariable (&gl_max_size);
 544         Cvar_RegisterVariable (&gl_picmip);
 545         Cvar_RegisterVariable (&r_lerpimages);
 546         Cvar_RegisterVariable (&r_precachetextures);
 547         Cvar_RegisterVariable (&gl_texture_anisotropy);
 548
 549         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 550 }
 551
 552 void R_Textures_Frame (void)
 553 {
 554         static int old_aniso = 0;
 555
 556         // could do procedural texture animation here, if we keep track of which
 557         // textures were accessed this frame...
 558
 559         // free the resize buffers
 560         resizebuffersize = 0;
 561         if (resizebuffer)
 562         {
 563                 Mem_Free(resizebuffer);
 564                 resizebuffer = NULL;
 565         }
 566         if (colorconvertbuffer)
 567         {
 568                 Mem_Free(colorconvertbuffer);
 569                 colorconvertbuffer = NULL;
 570         }
 571
 572         if (old_aniso != gl_texture_anisotropy.integer)
 573         {
 574                 gltextureimage_t *image;
 575                 gltexturepool_t *pool;
 576                 GLint oldbindtexnum;
 577
 578                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 579
 580                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
 581
 582                 for (pool = gltexturepoolchain;pool;pool = pool->next)
 583                 {
 584                         for (image = pool->imagechain;image;image = image->imagechain)
 585                         {
 586                                 // only update already uploaded images
 587                                 if (!(image->flags & GLTEXF_UPLOAD) && (image->flags & TEXF_MIPMAP))
 588                                 {
 589                                         qglGetIntegerv(gltexturetypebindingenums[image->texturetype], &oldbindtexnum);
 590
 591                                         qglBindTexture(gltexturetypeenums[image->texturetype], image->texnum);
 592                                         qglTexParameteri(gltexturetypeenums[image->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
 593
 594                                         qglBindTexture(gltexturetypeenums[image->texturetype], oldbindtexnum);
 595                                 }
 596                         }
 597                 }
 598         }
 599 }
 600
 601 void R_MakeResizeBufferBigger(int size)
 602 {
 603         if (resizebuffersize < size)
 604         {
 605                 resizebuffersize = size;
 606                 if (resizebuffer)
 607                         Mem_Free(resizebuffer);
 608                 if (colorconvertbuffer)
 609                         Mem_Free(colorconvertbuffer);
 610                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 611                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
 612                 if (!resizebuffer || !colorconvertbuffer)
 613                         Host_Error("R_Upload: out of memory");
 614         }
 615 }
 616
 617 static void GL_SetupTextureParameters(int flags, int texturetype)
 618 {
 619         int textureenum = gltexturetypeenums[texturetype];
 620         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
 621
 622         CHECKGLERROR
 623
 624         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
 625         {
 626                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
 627                 if (gl_texture_anisotropy.integer != aniso)
 628                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
 629                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
 630         }
 631         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
 632         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
 633         if (gltexturetypedimensions[texturetype] >= 3)
 634         {
 635                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
 636         }
 637
 638         CHECKGLERROR
 639         if (flags & TEXF_FORCENEAREST)
 640         {
 641                 if (flags & TEXF_MIPMAP)
 642                 {
 643                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
 644                 }
 645                 else
 646                 {
 647                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
 648                 }
 649                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
 650         }
 651         else if (flags & TEXF_FORCELINEAR)
 652         {
 653                 if (flags & TEXF_MIPMAP)
 654                 {
 655                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
 656                         {
 657                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
 658                         }
 659                         else
 660                         {
 661                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
 662                         }
 663                 }
 664                 else
 665                 {
 666                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
 667                 }
 668                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
 669         }
 670         else
 671         {
 672                 if (flags & TEXF_MIPMAP)
 673                 {
 674                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
 675                 }
 676                 else
 677                 {
 678                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
 679                 }
 680                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
 681         }
 682
 683         CHECKGLERROR
 684 }
 685
 686 static void R_Upload(gltexture_t *glt, unsigned char *data)
 687 {
 688         int i, mip, width, height, depth;
 689         GLint oldbindtexnum;
 690         unsigned char *prevbuffer;
 691         prevbuffer = data;
 692
 693         CHECKGLERROR
 694
 695         glt->texnum = glt->image->texnum;
 696         // we need to restore the texture binding after finishing the upload
 697         qglGetIntegerv(gltexturetypebindingenums[glt->image->texturetype], &oldbindtexnum);
 698         qglBindTexture(gltexturetypeenums[glt->image->texturetype], glt->image->texnum);
 699         CHECKGLERROR
 700         glt->flags &= ~GLTEXF_UPLOAD;
 701
 702         if (glt->flags & TEXF_FRAGMENT)
 703         {
 704                 if (glt->image->flags & GLTEXF_UPLOAD)
 705                 {
 706                         glt->image->flags &= ~GLTEXF_UPLOAD;
 707                         Con_DPrint("uploaded new fragments image\n");
 708                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 709                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 710                         switch(glt->image->texturetype)
 711                         {
 712                         case GLTEXTURETYPE_1D:
 713                                 qglTexImage1D(GL_TEXTURE_1D, 0, glt->image->glinternalformat, glt->image->width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 714                                 CHECKGLERROR
 715                                 break;
 716                         case GLTEXTURETYPE_2D:
 717                                 qglTexImage2D(GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 718                                 CHECKGLERROR
 719                                 break;
 720                         case GLTEXTURETYPE_3D:
 721                                 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);
 722                                 CHECKGLERROR
 723                                 break;
 724                         default:
 725                                 Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D");
 726                                 break;
 727                         }
 728                         GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 729                 }
 730
 731                 if (prevbuffer == NULL)
 732                 {
 733                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->bytesperpixel);
 734                         memset(resizebuffer, 0, glt->width * glt->height * glt->image->depth * glt->image->bytesperpixel);
 735                         prevbuffer = resizebuffer;
 736                 }
 737                 else if (glt->textype->textype == TEXTYPE_PALETTE)
 738                 {
 739                         // promote paletted to RGBA, so we only have to worry about RGB and
 740                         // RGBA in the rest of this code
 741                         R_MakeResizeBufferBigger(glt->image->width * glt->image->height * glt->image->depth * glt->image->sides * glt->image->bytesperpixel);
 742                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth, glt->palette);
 743                         prevbuffer = colorconvertbuffer;
 744                 }
 745
 746                 switch(glt->image->texturetype)
 747                 {
 748                 case GLTEXTURETYPE_1D:
 749                         qglTexSubImage1D(GL_TEXTURE_1D, 0, glt->x, glt->width, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 750                         CHECKGLERROR
 751                         break;
 752                 case GLTEXTURETYPE_2D:
 753                         qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 754                         CHECKGLERROR
 755                         break;
 756                 case GLTEXTURETYPE_3D:
 757                         qglTexSubImage3D(GL_TEXTURE_3D, 0, glt->x, glt->y, glt->z, glt->width, glt->height, glt->depth, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 758                         CHECKGLERROR
 759                         break;
 760                 default:
 761                         Host_Error("R_Upload: fragment texture of type other than 1D, 2D, or 3D");
 762                         break;
 763                 }
 764         }
 765         else
 766         {
 767                 glt->image->flags &= ~GLTEXF_UPLOAD;
 768
 769                 // these are rounded up versions of the size to do better resampling
 770                 for (width  = 1;width  < glt->width ;width  <<= 1);
 771                 for (height = 1;height < glt->height;height <<= 1);
 772                 for (depth  = 1;depth  < glt->depth ;depth  <<= 1);
 773
 774                 R_MakeResizeBufferBigger(width * height * depth * glt->image->sides * glt->image->bytesperpixel);
 775
 776                 if (prevbuffer == NULL)
 777                 {
 778                         width = glt->image->width;
 779                         height = glt->image->height;
 780                         depth = glt->image->depth;
 781                         memset(resizebuffer, 0, width * height * depth * glt->image->bytesperpixel);
 782                         prevbuffer = resizebuffer;
 783                 }
 784                 else
 785                 {
 786                         if (glt->textype->textype == TEXTYPE_PALETTE)
 787                         {
 788                                 // promote paletted to RGBA, so we only have to worry about RGB and
 789                                 // RGBA in the rest of this code
 790                                 Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height * glt->depth * glt->image->sides, glt->palette);
 791                                 prevbuffer = colorconvertbuffer;
 792                         }
 793                 }
 794
 795                 // cubemaps contain multiple images and thus get processed a bit differently
 796                 if (glt->image->texturetype != GLTEXTURETYPE_CUBEMAP)
 797                 {
 798                         if (glt->width != width || glt->height != height || glt->depth != depth)
 799                         {
 800                                 Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 801                                 prevbuffer = resizebuffer;
 802                         }
 803                         // picmip/max_size
 804                         while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 805                         {
 806                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 807                                 prevbuffer = resizebuffer;
 808                         }
 809                 }
 810                 mip = 0;
 811                 switch(glt->image->texturetype)
 812                 {
 813                 case GLTEXTURETYPE_1D:
 814                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 815                         CHECKGLERROR
 816                         if (glt->flags & TEXF_MIPMAP)
 817                         {
 818                                 while (width > 1 || height > 1 || depth > 1)
 819                                 {
 820                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 821                                         prevbuffer = resizebuffer;
 822                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->image->glinternalformat, width, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 823                                         CHECKGLERROR
 824                                 }
 825                         }
 826                         break;
 827                 case GLTEXTURETYPE_2D:
 828                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 829                         CHECKGLERROR
 830                         if (glt->flags & TEXF_MIPMAP)
 831                         {
 832                                 while (width > 1 || height > 1 || depth > 1)
 833                                 {
 834                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 835                                         prevbuffer = resizebuffer;
 836                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 837                                         CHECKGLERROR
 838                                 }
 839                         }
 840                         break;
 841                 case GLTEXTURETYPE_3D:
 842                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 843                         CHECKGLERROR
 844                         if (glt->flags & TEXF_MIPMAP)
 845                         {
 846                                 while (width > 1 || height > 1 || depth > 1)
 847                                 {
 848                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 849                                         prevbuffer = resizebuffer;
 850                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->image->glinternalformat, width, height, depth, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 851                                         CHECKGLERROR
 852                                 }
 853                         }
 854                         break;
 855                 case GLTEXTURETYPE_CUBEMAP:
 856                         // convert and upload each side in turn,
 857                         // from a continuous block of input texels
 858                         texturebuffer = prevbuffer;
 859                         for (i = 0;i < 6;i++)
 860                         {
 861                                 prevbuffer = texturebuffer;
 862                                 texturebuffer += glt->width * glt->height * glt->depth * glt->textype->inputbytesperpixel;
 863                                 if (glt->width != width || glt->height != height || glt->depth != depth)
 864                                 {
 865                                         Image_Resample(prevbuffer, glt->width, glt->height, glt->depth, resizebuffer, width, height, depth, glt->image->bytesperpixel, r_lerpimages.integer);
 866                                         prevbuffer = resizebuffer;
 867                                 }
 868                                 // picmip/max_size
 869                                 while (width > glt->image->width || height > glt->image->height || depth > glt->image->depth)
 870                                 {
 871                                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, glt->image->width, glt->image->height, glt->image->depth, glt->image->bytesperpixel);
 872                                         prevbuffer = resizebuffer;
 873                                 }
 874                                 mip = 0;
 875                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 876                                 CHECKGLERROR
 877                                 if (glt->flags & TEXF_MIPMAP)
 878                                 {
 879                                         while (width > 1 || height > 1 || depth > 1)
 880                                         {
 881                                                 Image_MipReduce(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1, glt->image->bytesperpixel);
 882                                                 prevbuffer = resizebuffer;
 883                                                 qglTexImage2D(cubemapside[i], mip++, glt->image->glinternalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 884                                                 CHECKGLERROR
 885                                         }
 886                                 }
 887                         }
 888                         break;
 889                 }
 890                 GL_SetupTextureParameters(glt->image->flags, glt->image->texturetype);
 891         }
 892         qglBindTexture(gltexturetypeenums[glt->image->texturetype], oldbindtexnum);
 893 }
 894
 895 static void R_FindImageForTexture(gltexture_t *glt)
 896 {
 897         int i, j, best, best2, x, y, z, w, h, d;
 898         textypeinfo_t *texinfo;
 899         gltexturepool_t *pool;
 900         gltextureimage_t *image, **imagechainpointer;
 901         texinfo = glt->textype;
 902         pool = glt->pool;
 903
 904         // remains -1 until uploaded
 905         glt->texnum = -1;
 906
 907         x = 0;
 908         y = 0;
 909         z = 0;
 910         w = glt->width;
 911         h = glt->height;
 912         d = glt->depth;
 913         if (glt->flags & TEXF_FRAGMENT)
 914         {
 915                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 916                 {
 917                         image = *imagechainpointer;
 918                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 919                                 continue;
 920                         if (image->texturetype != glt->texturetype)
 921                                 continue;
 922                         if ((image->flags ^ glt->flags) & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP | TEXF_FORCENEAREST | TEXF_FORCELINEAR))
 923                                 continue;
 924                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 925                                 continue;
 926                         if (glt->width > image->width || glt->height > image->height || glt->depth > image->depth)
 927                                 continue;
 928
 929                         // got a fragments texture, find a place in it if we can
 930                         for (best = image->width, i = 0;i < image->width - w;i++)
 931                         {
 932                                 for (best2 = 0, j = 0;j < w;j++)
 933                                 {
 934                                         if (image->blockallocation[i+j] >= best)
 935                                                 break;
 936                                         if (best2 < image->blockallocation[i+j])
 937                                                 best2 = image->blockallocation[i+j];
 938                                 }
 939                                 if (j == w)
 940                                 {
 941                                         // this is a valid spot
 942                                         x = i;
 943                                         y = best = best2;
 944                                 }
 945                         }
 946
 947                         if (best + h > image->height)
 948                                 continue;
 949
 950                         for (i = 0;i < w;i++)
 951                                 image->blockallocation[x + i] = best + h;
 952
 953                         glt->x = x;
 954                         glt->y = y;
 955                         glt->z = 0;
 956                         glt->image = image;
 957                         image->texturecount++;
 958                         return;
 959                 }
 960
 961                 image = (gltextureimage_t *)Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 962                 if (image == NULL)
 963                 {
 964                         Con_Printf ("R_FindImageForTexture: ran out of memory\n");
 965                         return;
 966                 }
 967                 image->type = GLIMAGETYPE_FRAGMENTS;
 968                 // make sure the created image is big enough for the fragment
 969                 for (image->width = block_size;image->width < glt->width;image->width <<= 1);
 970                 image->height = 1;
 971                 if (gltexturetypedimensions[glt->texturetype] >= 2)
 972                         for (image->height = block_size;image->height < glt->height;image->height <<= 1);
 973                 image->depth = 1;
 974                 if (gltexturetypedimensions[glt->texturetype] >= 3)
 975                         for (image->depth = block_size;image->depth < glt->depth;image->depth <<= 1);
 976                 image->blockallocation = (short int *)Mem_Alloc(texturemempool, image->width * sizeof(short));
 977                 memset(image->blockallocation, 0, image->width * sizeof(short));
 978
 979                 x = 0;
 980                 y = 0;
 981                 z = 0;
 982                 for (i = 0;i < w;i++)
 983                         image->blockallocation[x + i] = y + h;
 984         }
 985         else
 986         {
 987                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 988
 989                 image = (gltextureimage_t *)Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 990                 if (image == NULL)
 991                 {
 992                         Con_Printf ("R_FindImageForTexture: ran out of memory\n");
 993                         return;
 994                 }
 995                 image->type = GLIMAGETYPE_TILE;
 996                 image->blockallocation = NULL;
 997
 998                 GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->width, glt->height, glt->depth, &image->width, &image->height, &image->depth);
 999         }
1000         image->texturetype = glt->texturetype;
1001         image->glinternalformat = texinfo->glinternalformat;
1002         image->glformat = texinfo->glformat;
1003         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA | TEXF_CLAMP | TEXF_PICMIP | TEXF_FORCENEAREST | TEXF_FORCELINEAR)) | GLTEXF_UPLOAD;
1004         image->bytesperpixel = texinfo->internalbytesperpixel;
1005         image->sides = image->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1006         // get a texture number to use
1007         qglGenTextures(1, (GLuint *)&image->texnum);
1008         *imagechainpointer = image;
1009         image->texturecount++;
1010
1011         glt->x = x;
1012         glt->y = y;
1013         glt->z = z;
1014         glt->image = image;
1015 }
1016
1017 // note: R_FindImageForTexture must be called before this
1018 static void R_UploadTexture (gltexture_t *glt)
1019 {
1020         if (!(glt->flags & GLTEXF_UPLOAD))
1021                 return;
1022
1023         R_Upload(glt, glt->inputtexels);
1024         if (glt->inputtexels)
1025         {
1026                 Mem_Free(glt->inputtexels);
1027                 glt->inputtexels = NULL;
1028                 glt->flags |= GLTEXF_DESTROYED;
1029         }
1030         else if (glt->flags & GLTEXF_DESTROYED)
1031                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
1032 }
1033
1034 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 unsigned char *data, const unsigned int *palette)
1035 {
1036         int i, size;
1037         gltexture_t *glt;
1038         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1039         textypeinfo_t *texinfo;
1040
1041         if (cls.state == ca_dedicated)
1042                 return NULL;
1043
1044         if (flags & TEXF_FRAGMENT && texturetype != GLTEXTURETYPE_2D)
1045         {
1046                 Con_Printf ("R_LoadTexture: only 2D fragment textures implemented\n");
1047                 return NULL;
1048         }
1049         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
1050         {
1051                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
1052                 return NULL;
1053         }
1054         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
1055         {
1056                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
1057                 return NULL;
1058         }
1059
1060         texinfo = R_GetTexTypeInfo(textype, flags);
1061         size = width * height * depth * sides * texinfo->inputbytesperpixel;
1062         if (size < 1)
1063         {
1064                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides);
1065                 return NULL;
1066         }
1067
1068         // clear the alpha flag if the texture has no transparent pixels
1069         switch(textype)
1070         {
1071         case TEXTYPE_PALETTE:
1072                 if (flags & TEXF_ALPHA)
1073                 {
1074                         flags &= ~TEXF_ALPHA;
1075                         if (data)
1076                         {
1077                                 for (i = 0;i < size;i++)
1078                                 {
1079                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
1080                                         {
1081                                                 flags |= TEXF_ALPHA;
1082                                                 break;
1083                                         }
1084                                 }
1085                         }
1086                 }
1087                 break;
1088         case TEXTYPE_RGB:
1089                 if (flags & TEXF_ALPHA)
1090                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA");
1091                 break;
1092         case TEXTYPE_RGBA:
1093                 if (flags & TEXF_ALPHA)
1094                 {
1095                         flags &= ~TEXF_ALPHA;
1096                         if (data)
1097                         {
1098                                 for (i = 3;i < size;i += 4)
1099                                 {
1100                                         if (data[i] < 255)
1101                                         {
1102                                                 flags |= TEXF_ALPHA;
1103                                                 break;
1104                                         }
1105                                 }
1106                         }
1107                 }
1108                 break;
1109         case TEXTYPE_DSDT:
1110                 break;
1111         default:
1112                 Host_Error("R_LoadTexture: unknown texture type");
1113         }
1114
1115         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
1116         if (identifier)
1117                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1118         glt->pool = pool;
1119         glt->chain = pool->gltchain;
1120         pool->gltchain = glt;
1121         glt->width = width;
1122         glt->height = height;
1123         glt->depth = depth;
1124         glt->flags = flags | GLTEXF_UPLOAD;
1125         glt->textype = texinfo;
1126         glt->texturetype = texturetype;
1127         glt->inputdatasize = size;
1128         glt->palette = palette;
1129
1130         if (data)
1131         {
1132                 glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
1133                 if (glt->inputtexels == NULL)
1134                         Con_Printf ("R_LoadTexture: out of memory\n");
1135                 else
1136                         memcpy(glt->inputtexels, data, size);
1137         }
1138         else
1139                 glt->inputtexels = NULL;
1140
1141         R_FindImageForTexture(glt);
1142         R_PrecacheTexture(glt);
1143
1144         return (rtexture_t *)glt;
1145 }
1146
1147 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1148 {
1149         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1150 }
1151
1152 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1153 {
1154         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1155 }
1156
1157 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1158 {
1159         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1160 }
1161
1162 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, int textype, int flags, const unsigned int *palette)
1163 {
1164         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1165 }
1166
1167 int R_TextureHasAlpha(rtexture_t *rt)
1168 {
1169         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1170 }
1171
1172 int R_TextureWidth(rtexture_t *rt)
1173 {
1174         return rt ? ((gltexture_t *)rt)->width : 0;
1175 }
1176
1177 int R_TextureHeight(rtexture_t *rt)
1178 {
1179         return rt ? ((gltexture_t *)rt)->height : 0;
1180 }
1181
1182 void R_FragmentLocation3D(rtexture_t *rt, int *x, int *y, int *z, float *fx1, float *fy1, float *fz1, float *fx2, float *fy2, float *fz2)
1183 {
1184         gltexture_t *glt;
1185         float iwidth, iheight, idepth;
1186         if (cls.state == ca_dedicated)
1187         {
1188                 if (x)
1189                         *x = 0;
1190                 if (y)
1191                         *y = 0;
1192                 if (z)
1193                         *z = 0;
1194                 if (fx1 || fy1 || fx2 || fy2)
1195                 {
1196                         if (fx1)
1197                                 *fx1 = 0;
1198                         if (fy1)
1199                                 *fy1 = 0;
1200                         if (fz1)
1201                                 *fz1 = 0;
1202                         if (fx2)
1203                                 *fx2 = 1;
1204                         if (fy2)
1205                                 *fy2 = 1;
1206                         if (fz2)
1207                                 *fz2 = 1;
1208                 }
1209                 return;
1210         }
1211         if (!rt)
1212                 Host_Error("R_FragmentLocation: no texture supplied");
1213         glt = (gltexture_t *)rt;
1214         if (glt->flags & TEXF_FRAGMENT)
1215         {
1216                 if (x)
1217                         *x = glt->x;
1218                 if (y)
1219                         *y = glt->y;
1220                 if (fx1 || fy1 || fx2 || fy2)
1221                 {
1222                         iwidth = 1.0f / glt->image->width;
1223                         iheight = 1.0f / glt->image->height;
1224                         idepth = 1.0f / glt->image->depth;
1225                         if (fx1)
1226                                 *fx1 = glt->x * iwidth;
1227                         if (fy1)
1228                                 *fy1 = glt->y * iheight;
1229                         if (fz1)
1230                                 *fz1 = glt->z * idepth;
1231                         if (fx2)
1232                                 *fx2 = (glt->x + glt->width) * iwidth;
1233                         if (fy2)
1234                                 *fy2 = (glt->y + glt->height) * iheight;
1235                         if (fz2)
1236                                 *fz2 = (glt->z + glt->depth) * idepth;
1237                 }
1238         }
1239         else
1240         {
1241                 if (x)
1242                         *x = 0;
1243                 if (y)
1244                         *y = 0;
1245                 if (z)
1246                         *z = 0;
1247                 if (fx1 || fy1 || fx2 || fy2)
1248                 {
1249                         if (fx1)
1250                                 *fx1 = 0;
1251                         if (fy1)
1252                                 *fy1 = 0;
1253                         if (fz1)
1254                                 *fz1 = 0;
1255                         if (fx2)
1256                                 *fx2 = 1;
1257                         if (fy2)
1258                                 *fy2 = 1;
1259                         if (fz2)
1260                                 *fz2 = 1;
1261                 }
1262         }
1263 }
1264
1265 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1266 {
1267         R_FragmentLocation3D(rt, x, y, NULL, fx1, fy1, NULL, fx2, fy2, NULL);
1268 }
1269
1270 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1271 {
1272         return width;
1273 }
1274
1275 void R_UpdateTexture(rtexture_t *rt, unsigned char *data)
1276 {
1277         gltexture_t *glt;
1278         if (rt == NULL)
1279                 Host_Error("R_UpdateTexture: no texture supplied");
1280         if (data == NULL)
1281                 Host_Error("R_UpdateTexture: no data supplied");
1282         glt = (gltexture_t *)rt;
1283
1284         // if it has not been uploaded yet, update the data that will be used when it is
1285         if (glt->inputtexels)
1286                 memcpy(glt->inputtexels, data, glt->inputdatasize);
1287         else
1288                 R_Upload(glt, data);
1289 }
1290