gl_textures.c

   1
   2 #include "quakedef.h"
   3
   4 cvar_t  r_max_size = {CVAR_SAVE, "r_max_size", "2048"};
   5 cvar_t  r_max_scrapsize = {CVAR_SAVE, "r_max_scrapsize", "256"};
   6 cvar_t  r_picmip = {CVAR_SAVE, "r_picmip", "0"};
   7 cvar_t  r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
   8 cvar_t  r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
   9
  10 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
  11 int             gl_filter_mag = GL_LINEAR;
  12
  13
  14 static mempool_t *texturemempool;
  15 static mempool_t *texturedatamempool;
  16 static mempool_t *textureprocessingmempool;
  17
  18 // note: this must not conflict with TEXF_ flags in r_textures.h
  19 // cleared when a texture is uploaded
  20 #define GLTEXF_UPLOAD 0x00010000
  21 // texture generated by code, also causes permanent GLTEXF_UPLOAD effect
  22 #define GLTEXF_PROCEDURAL 0x00020000
  23 // bitmask for mismatch checking
  24 #define GLTEXF_IMPORTANTBITS (GLTEXF_PROCEDURAL)
  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 //#define BLOCK_SIZE 256
  30 static int block_size;
  31
  32 // really this number only governs gltexnuminuse
  33 #define MAX_GLTEXTURES 65536
  34
  35 // since there is only one set of GL texture numbers, we have to track them
  36 // globally, everything else is per texture pool
  37 static qbyte *gltexnuminuse;
  38
  39 typedef struct
  40 {
  41         int textype;
  42         int inputbytesperpixel;
  43         int internalbytesperpixel;
  44         int glformat;
  45         int glinternalformat;
  46         int align;
  47 }
  48 textypeinfo_t;
  49
  50 static textypeinfo_t textype_qpalette       = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 3, 1};
  51 static textypeinfo_t textype_rgb            = {TEXTYPE_RGB     , 3, 3, GL_RGB , 3, 3};
  52 static textypeinfo_t textype_rgba           = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 3, 1};
  53 static textypeinfo_t textype_qpalette_alpha = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 4, 1};
  54 static textypeinfo_t textype_rgba_alpha     = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 4, 1};
  55
  56 // a tiling texture (most common type)
  57 #define GLIMAGETYPE_TILE 0
  58 // a fragments texture (contains one or more fragment textures)
  59 #define GLIMAGETYPE_FRAGMENTS 1
  60
  61 // a gltextureimage can have one (or more if fragments) gltextures inside
  62 typedef struct gltextureimage_s
  63 {
  64         struct gltextureimage_s *imagechain;
  65         int texturecount;
  66         int type; // one of the GLIMAGETYPE_ values
  67         int texnum; // GL texture slot number
  68         int width, height;
  69         int bytesperpixel; // bytes per pixel
  70         int glformat; // GL_RGB or GL_RGBA
  71         int glinternalformat; // 3 or 4
  72         int flags;
  73         short *blockallocation; // fragment allocation
  74 }
  75 gltextureimage_t;
  76
  77 typedef struct gltexture_s
  78 {
  79         // pointer to texturepool (check this to see if the texture is allocated)
  80         struct gltexturepool_s *pool;
  81         // pointer to next texture in texturepool chain
  82         struct gltexture_s *chain;
  83         // pointer into gltextureimage array
  84         gltextureimage_t *image;
  85         // name of the texture (this might be removed someday), no duplicates
  86         char *identifier;
  87         // location in the image, and size
  88         int x, y, width, height;
  89         // copy of the original texture supplied to the upload function, for re-uploading or deferred uploads (non-precached)
  90         qbyte *inputtexels;
  91         // to identify cache mismatchs (this might be removed someday)
  92         int crc;
  93         // flags supplied to the LoadTexture/ProceduralTexture functions
  94         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
  95         int flags;
  96         // procedural texture generation function, called once per frame if the texture is used
  97         int (*generate)(qbyte *buffer, int width, int height, void *parameterdata, int parameterdatasize);
  98         // data provided to generate, persistent from call to call
  99         qbyte *proceduraldata;
 100         // size of data
 101         int proceduraldatasize;
 102         // used only to avoid updating the texture more than once per frame
 103         int proceduralframecount;
 104         // pointer to one of the textype_ structs
 105         textypeinfo_t *textype;
 106 }
 107 gltexture_t;
 108
 109 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 110
 111 typedef struct gltexturepool_s
 112 {
 113         int sentinel;
 114         struct gltextureimage_s *imagechain;
 115         struct gltexture_s *gltchain;
 116         struct gltexturepool_s *next;
 117 }
 118 gltexturepool_t;
 119
 120 static gltexturepool_t *gltexturepoolchain = NULL;
 121
 122 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
 123 static int resizebuffersize = 0;
 124 static qbyte *texturebuffer;
 125 static int texturebuffersize = 0;
 126
 127 static int realmaxsize = 0;
 128
 129 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 130 {
 131         if (flags & TEXF_ALPHA)
 132         {
 133                 switch(textype)
 134                 {
 135                 case TEXTYPE_QPALETTE:
 136                         return &textype_qpalette_alpha;
 137                 case TEXTYPE_RGB:
 138                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
 139                         return NULL;
 140                 case TEXTYPE_RGBA:
 141                         return &textype_rgba_alpha;
 142                 default:
 143                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 144                         return NULL;
 145                 }
 146         }
 147         else
 148         {
 149                 switch(textype)
 150                 {
 151                 case TEXTYPE_QPALETTE:
 152                         return &textype_qpalette;
 153                 case TEXTYPE_RGB:
 154                         return &textype_rgb;
 155                 case TEXTYPE_RGBA:
 156                         return &textype_rgba;
 157                 default:
 158                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 159                         return NULL;
 160                 }
 161         }
 162 }
 163
 164 static void R_UploadTexture(gltexture_t *t);
 165
 166 static void R_PrecacheTexture(gltexture_t *glt)
 167 {
 168         int precache;
 169         precache = false;
 170         if (glt->flags & TEXF_ALWAYSPRECACHE)
 171                 precache = true;
 172         else if (r_precachetextures.integer >= 2)
 173                 precache = true;
 174         else if (r_precachetextures.integer >= 1)
 175                 if (glt->flags & TEXF_PRECACHE)
 176                         precache = true;
 177
 178         if (precache)
 179                 R_UploadTexture(glt);
 180 }
 181
 182 int R_GetTexture(rtexture_t *rt)
 183 {
 184         gltexture_t *glt;
 185         if (!rt)
 186                 return 0;
 187         glt = (gltexture_t *)rt;
 188         if (glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL))
 189         {
 190                 if (glt->flags & GLTEXF_PROCEDURAL)
 191                 {
 192                         if (glt->proceduralframecount != r_framecount)
 193                         {
 194                                 glt->proceduralframecount = r_framecount;
 195                                 R_UploadTexture(glt);
 196                         }
 197                 }
 198                 else
 199                         R_UploadTexture(glt);
 200         }
 201         return glt->image->texnum;
 202 }
 203
 204 static void R_FreeTexture(gltexture_t *glt)
 205 {
 206         gltexture_t **gltpointer;
 207         gltextureimage_t *image, **gltimagepointer;
 208         GLuint texnum;
 209
 210         if (glt == NULL)
 211                 Host_Error("R_FreeTexture: texture == NULL\n");
 212
 213         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 214         if (*gltpointer == glt)
 215                 *gltpointer = glt->chain;
 216         else
 217                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
 218
 219         // note: if freeing a fragment texture, this will not make the claimed
 220         // space available for new textures unless all other fragments in the
 221         // image are also freed
 222         image = glt->image;
 223         image->texturecount--;
 224         if (image->texturecount < 1)
 225         {
 226                 for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 227                 if (*gltimagepointer == image)
 228                         *gltimagepointer = image->imagechain;
 229                 else
 230                         Host_Error("R_FreeTexture: image not linked in pool\n");
 231                 if (image->texnum)
 232                 {
 233                         texnum = image->texnum;
 234                         gltexnuminuse[image->texnum] = 0;
 235                         qglDeleteTextures(1, &texnum);
 236                 }
 237                 if (image->blockallocation)
 238                         Mem_Free(image->blockallocation);
 239                 Mem_Free(image);
 240         }
 241
 242         if (glt->identifier)
 243                 Mem_Free(glt->identifier);
 244         if (glt->inputtexels)
 245                 Mem_Free(glt->inputtexels);
 246         if (glt->proceduraldata)
 247                 Mem_Free(glt->proceduraldata);
 248         Mem_Free(glt);
 249 }
 250
 251 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 252 {
 253         gltexture_t     *glt;
 254
 255         if (!identifier)
 256                 return NULL;
 257
 258         for (glt = pool->gltchain;glt;glt = glt->chain)
 259                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 260                         return glt;
 261
 262         return NULL;
 263 }
 264
 265 rtexturepool_t *R_AllocTexturePool(void)
 266 {
 267         gltexturepool_t *pool;
 268         if (texturemempool == NULL)
 269                 return NULL;
 270         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 271         if (pool == NULL)
 272                 return NULL;
 273         pool->next = gltexturepoolchain;
 274         gltexturepoolchain = pool;
 275         pool->sentinel = TEXTUREPOOL_SENTINEL;
 276         return (rtexturepool_t *)pool;
 277 }
 278
 279 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 280 {
 281         gltexturepool_t *pool, **poolpointer;
 282         if (rtexturepool == NULL)
 283                 return;
 284         if (*rtexturepool == NULL)
 285                 return;
 286         pool = (gltexturepool_t *)(*rtexturepool);
 287         *rtexturepool = NULL;
 288         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 289                 Host_Error("R_FreeTexturePool: pool already freed\n");
 290         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 291         if (*poolpointer == pool)
 292                 *poolpointer = pool->next;
 293         else
 294                 Host_Error("R_FreeTexturePool: pool not linked\n");
 295         while (pool->gltchain)
 296                 R_FreeTexture(pool->gltchain);
 297         if (pool->imagechain)
 298                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 299         Mem_Free(pool);
 300 }
 301
 302
 303 typedef struct
 304 {
 305         char *name;
 306         int minification, magnification;
 307 }
 308 glmode_t;
 309
 310 static glmode_t modes[] =
 311 {
 312         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 313         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 314         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 315         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 316         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 317         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 318 };
 319
 320 extern int gl_backend_rebindtextures;
 321
 322 static void GL_TextureMode_f (void)
 323 {
 324         int i;
 325         gltextureimage_t *image;
 326         gltexturepool_t *pool;
 327
 328         if (Cmd_Argc() == 1)
 329         {
 330                 for (i = 0;i < 6;i++)
 331                 {
 332                         if (gl_filter_min == modes[i].minification)
 333                         {
 334                                 Con_Printf ("%s\n", modes[i].name);
 335                                 return;
 336                         }
 337                 }
 338                 Con_Printf ("current filter is unknown???\n");
 339                 return;
 340         }
 341
 342         for (i = 0;i < 6;i++)
 343                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 344                         break;
 345         if (i == 6)
 346         {
 347                 Con_Printf ("bad filter name\n");
 348                 return;
 349         }
 350
 351         gl_filter_min = modes[i].minification;
 352         gl_filter_mag = modes[i].magnification;
 353
 354         // change all the existing mipmap texture objects
 355         // FIXME: force renderer(/client/something?) restart instead?
 356         for (pool = gltexturepoolchain;pool;pool = pool->next)
 357         {
 358                 for (image = pool->imagechain;image;image = image->imagechain)
 359                 {
 360                         // only update already uploaded images
 361                         if (!(image->flags & GLTEXF_UPLOAD))
 362                         {
 363                                 qglBindTexture(GL_TEXTURE_2D, image->texnum);
 364                                 if (image->flags & TEXF_MIPMAP)
 365                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 366                                 else
 367                                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 368                                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 369                         }
 370                 }
 371         }
 372         gl_backend_rebindtextures = true;
 373 }
 374
 375 static int R_CalcTexelDataSize (gltexture_t *glt)
 376 {
 377         int width2, height2, size;
 378         if (glt->flags & TEXF_FRAGMENT)
 379                 size = glt->width * glt->height;
 380         else
 381         {
 382                 if (r_max_size.integer > realmaxsize)
 383                         Cvar_SetValue("r_max_size", realmaxsize);
 384                 // calculate final size
 385                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 386                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 387                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
 388                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
 389                 if (width2 < 1) width2 = 1;
 390                 if (height2 < 1) height2 = 1;
 391
 392                 size = 0;
 393                 if (glt->flags & TEXF_MIPMAP)
 394                 {
 395                         while (width2 > 1 || height2 > 1)
 396                         {
 397                                 size += width2 * height2;
 398                                 if (width2 > 1)
 399                                         width2 >>= 1;
 400                                 if (height2 > 1)
 401                                         height2 >>= 1;
 402                         }
 403                         size++; // count the last 1x1 mipmap
 404                 }
 405                 else
 406                         size = width2*height2;
 407         }
 408         size *= glt->textype->internalbytesperpixel;
 409
 410         return size;
 411 }
 412
 413 void R_TextureStats_PrintTotal(void)
 414 {
 415         int glsize, inputsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 416         gltexture_t *glt;
 417         gltexturepool_t *pool;
 418         for (pool = gltexturepoolchain;pool;pool = pool->next)
 419         {
 420                 for (glt = pool->gltchain;glt;glt = glt->chain)
 421                 {
 422                         glsize = R_CalcTexelDataSize(glt);
 423                         inputsize = glt->width * glt->height * glt->textype->inputbytesperpixel;
 424
 425                         total++;
 426                         totalt += glsize;
 427                         totalp += inputsize;
 428                         if (!(glt->flags & GLTEXF_UPLOAD))
 429                         {
 430                                 loaded++;
 431                                 loadedt += glsize;
 432                                 loadedp += inputsize;
 433                         }
 434                 }
 435         }
 436         Con_Printf("total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", total, totalt / 1048576.0, totalp / 1048576.0, loaded, loadedt / 1048576.0, loadedp / 1048576.0, total - loaded, (totalt - loadedt) / 1048576.0, (totalp - loadedp) / 1048576.0);
 437 }
 438
 439 static void R_TextureStats_f(void)
 440 {
 441         int loaded;
 442         gltexture_t *glt;
 443         gltexturepool_t *pool;
 444         Con_Printf("glsize input crc  loaded mip alpha name\n");
 445         for (pool = gltexturepoolchain;pool;pool = pool->next)
 446         {
 447                 for (glt = pool->gltchain;glt;glt = glt->chain)
 448                 {
 449                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 450                         if (glt->flags & GLTEXF_PROCEDURAL)
 451                                 Con_Printf("%c%4i%c %4i  PROC %s %s %s %s\n"  , loaded ? '[' : ' ', (R_CalcTexelDataSize(glt) + 1023) / 1024, loaded ? ']' : ' ',                               (glt->width * glt->height * glt->textype->inputbytesperpixel + 1023) / 1024,                                         loaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier ? glt->identifier : "<unnamed>");
 452                         else
 453                                 Con_Printf("%c%4i%c%c%4i%c %04X %s %s %s %s\n", loaded ? '[' : ' ', (R_CalcTexelDataSize(glt) + 1023) / 1024, loaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->width * glt->height * glt->textype->inputbytesperpixel + 1023) / 1024, glt->inputtexels ? ']' : ' ', glt->crc, loaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier ? glt->identifier : "<unnamed>");
 454                 }
 455                 Con_Printf("pool %10p\n", pool);
 456         }
 457         R_TextureStats_PrintTotal();
 458 }
 459
 460 char engineversion[40];
 461
 462 static void r_textures_start(void)
 463 {
 464         // deal with size limits of various drivers (3dfx in particular)
 465         qglGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 466         CHECKGLERROR
 467
 468         // use the largest scrap texture size we can (not sure if this is really a good idea)
 469         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
 470
 471         texturemempool = Mem_AllocPool("Texture Info");
 472         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
 473         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
 474         gltexnuminuse = Mem_Alloc(texturemempool, MAX_GLTEXTURES);
 475 }
 476
 477 static void r_textures_shutdown(void)
 478 {
 479         rtexturepool_t *temp;
 480         while(gltexturepoolchain)
 481         {
 482                 temp = (rtexturepool_t *) gltexturepoolchain;
 483                 R_FreeTexturePool(&temp);
 484         }
 485
 486         resizebuffersize = 0;
 487         texturebuffersize = 0;
 488         resizebuffer = NULL;
 489         colorconvertbuffer = NULL;
 490         texturebuffer = NULL;
 491         gltexnuminuse = NULL;
 492         Mem_FreePool(&texturemempool);
 493         Mem_FreePool(&texturedatamempool);
 494         Mem_FreePool(&textureprocessingmempool);
 495 }
 496
 497 static void r_textures_newmap(void)
 498 {
 499 }
 500
 501 void R_Textures_Init (void)
 502 {
 503         Cmd_AddCommand ("gl_texturemode", &GL_TextureMode_f);
 504         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 505         Cvar_RegisterVariable (&r_max_scrapsize);
 506         Cvar_RegisterVariable (&r_max_size);
 507         Cvar_RegisterVariable (&r_picmip);
 508         Cvar_RegisterVariable (&r_lerpimages);
 509         Cvar_RegisterVariable (&r_precachetextures);
 510         gltexnuminuse = NULL;
 511
 512         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 513 }
 514
 515 static void R_Upload(gltexture_t *glt, qbyte *data)
 516 {
 517         int mip, width, height, internalformat;
 518         qbyte *prevbuffer;
 519         prevbuffer = data;
 520
 521         qglBindTexture(GL_TEXTURE_2D, glt->image->texnum);
 522         CHECKGLERROR
 523
 524         gl_backend_rebindtextures = true;
 525
 526         glt->flags &= ~GLTEXF_UPLOAD;
 527
 528         if (glt->flags & TEXF_FRAGMENT)
 529         {
 530                 if (resizebuffersize < glt->image->width * glt->image->height * glt->image->bytesperpixel)
 531                 {
 532                         resizebuffersize = glt->image->width * glt->image->height * glt->image->bytesperpixel;
 533                         if (resizebuffer)
 534                                 Mem_Free(resizebuffer);
 535                         if (colorconvertbuffer)
 536                                 Mem_Free(colorconvertbuffer);
 537                         resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 538                         colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 539                         if (!resizebuffer || !colorconvertbuffer)
 540                                 Host_Error("R_Upload: out of memory\n");
 541                 }
 542
 543                 if (glt->image->flags & GLTEXF_UPLOAD)
 544                 {
 545                         Con_DPrintf("uploaded new fragments image\n");
 546                         glt->image->flags &= ~GLTEXF_UPLOAD;
 547                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->bytesperpixel);
 548                         qglTexImage2D (GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 549                         CHECKGLERROR
 550                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 551                         CHECKGLERROR
 552                         qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 553                         CHECKGLERROR
 554                 }
 555
 556                 if (prevbuffer == NULL)
 557                 {
 558                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->bytesperpixel);
 559                         prevbuffer = resizebuffer;
 560                 }
 561                 else if (glt->textype->textype == TEXTYPE_QPALETTE)
 562                 {
 563                         // promote paletted to RGBA, so we only have to worry about RGB and
 564                         // RGBA in the rest of this code
 565                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
 566                         prevbuffer = colorconvertbuffer;
 567                 }
 568
 569                 qglTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 570                 CHECKGLERROR
 571                 return;
 572         }
 573
 574         glt->image->flags &= ~GLTEXF_UPLOAD;
 575
 576         // these are rounded up versions of the size to do better resampling
 577         for (width = 1;width < glt->width;width <<= 1);
 578         for (height = 1;height < glt->height;height <<= 1);
 579
 580         if (resizebuffersize < width * height * glt->image->bytesperpixel)
 581         {
 582                 resizebuffersize = width * height * glt->image->bytesperpixel;
 583                 if (resizebuffer)
 584                         Mem_Free(resizebuffer);
 585                 if (colorconvertbuffer)
 586                         Mem_Free(colorconvertbuffer);
 587                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 588                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 589                 if (!resizebuffer || !colorconvertbuffer)
 590                         Host_Error("R_Upload: out of memory\n");
 591         }
 592
 593         if (prevbuffer == NULL)
 594         {
 595                 width = glt->image->width;
 596                 height = glt->image->height;
 597                 memset(resizebuffer, 255, width * height * glt->image->bytesperpixel);
 598                 prevbuffer = resizebuffer;
 599         }
 600         else
 601         {
 602                 if (glt->textype->textype == TEXTYPE_QPALETTE)
 603                 {
 604                         // promote paletted to RGBA, so we only have to worry about RGB and
 605                         // RGBA in the rest of this code
 606                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
 607                         prevbuffer = colorconvertbuffer;
 608                 }
 609
 610                 if (glt->width != width || glt->height != height)
 611                 {
 612                         Image_Resample(prevbuffer, glt->width, glt->height, resizebuffer, width, height, glt->image->bytesperpixel, r_lerpimages.integer);
 613                         prevbuffer = resizebuffer;
 614                 }
 615
 616                 // apply picmip/max_size limitations
 617                 while (width > glt->image->width || height > glt->image->height)
 618                 {
 619                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, glt->image->width, glt->image->height, glt->image->bytesperpixel);
 620                         prevbuffer = resizebuffer;
 621                 }
 622         }
 623
 624         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
 625         internalformat = 3;
 626         if (glt->flags & TEXF_ALPHA)
 627                 internalformat = 4;
 628
 629         mip = 0;
 630         qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 631         CHECKGLERROR
 632         if (glt->flags & TEXF_MIPMAP)
 633         {
 634                 while (width > 1 || height > 1)
 635                 {
 636                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, 1, 1, glt->image->bytesperpixel);
 637                         prevbuffer = resizebuffer;
 638
 639                         qglTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 640                         CHECKGLERROR
 641                 }
 642
 643                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 644                 CHECKGLERROR
 645                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 646                 CHECKGLERROR
 647         }
 648         else
 649         {
 650                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 651                 CHECKGLERROR
 652                 qglTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 653                 CHECKGLERROR
 654         }
 655 }
 656
 657 static void R_FindImageForTexture(gltexture_t *glt)
 658 {
 659         int i, j, best, best2, x, y, w, h;
 660         textypeinfo_t *texinfo;
 661         gltexturepool_t *pool;
 662         gltextureimage_t *image, **imagechainpointer;
 663         texinfo = glt->textype;
 664         pool = glt->pool;
 665
 666         x = 0;
 667         y = 0;
 668         w = glt->width;
 669         h = glt->height;
 670         if (glt->flags & TEXF_FRAGMENT)
 671         {
 672                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 673                 {
 674                         image = *imagechainpointer;
 675                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 676                                 continue;
 677                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 678                                 continue;
 679
 680                         // got a fragments texture, find a place in it if we can
 681                         best = block_size;
 682                         for (best = block_size, i = 0;i < block_size - w;i += texinfo->align)
 683                         {
 684                                 for (best2 = 0, j = 0;j < w;j++)
 685                                 {
 686                                         if (image->blockallocation[i+j] >= best)
 687                                                 break;
 688                                         if (best2 < image->blockallocation[i+j])
 689                                                 best2 = image->blockallocation[i+j];
 690                                 }
 691                                 if (j == w)
 692                                 {
 693                                         // this is a valid spot
 694                                         x = i;
 695                                         y = best = best2;
 696                                 }
 697                         }
 698
 699                         if (best + h > block_size)
 700                                 continue;
 701
 702                         for (i = 0;i < w;i++)
 703                                 image->blockallocation[x + i] = best + h;
 704
 705                         glt->x = x;
 706                         glt->y = y;
 707                         glt->image = image;
 708                         image->texturecount++;
 709                         return;
 710                 }
 711
 712                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 713                 if (image == NULL)
 714                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 715                 image->type = GLIMAGETYPE_FRAGMENTS;
 716                 image->width = block_size;
 717                 image->height = block_size;
 718                 image->blockallocation = Mem_Alloc(texturemempool, block_size * sizeof(short));
 719                 memset(image->blockallocation, 0, block_size * sizeof(short));
 720
 721                 x = 0;
 722                 y = 0;
 723                 for (i = 0;i < w;i++)
 724                         image->blockallocation[x + i] = y + h;
 725         }
 726         else
 727         {
 728                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 729
 730                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 731                 if (image == NULL)
 732                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 733                 image->type = GLIMAGETYPE_TILE;
 734                 image->blockallocation = NULL;
 735
 736                 // calculate final size
 737                 if (r_max_size.integer > realmaxsize)
 738                         Cvar_SetValue("r_max_size", realmaxsize);
 739                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 740                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 741                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
 742                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
 743                 if (image->width < 1) image->width = 1;
 744                 if (image->height < 1) image->height = 1;
 745         }
 746         image->glinternalformat = texinfo->glinternalformat;
 747         image->glformat = texinfo->glformat;
 748         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA)) | GLTEXF_UPLOAD;
 749         image->bytesperpixel = texinfo->internalbytesperpixel;
 750         for (i = 1;i < MAX_GLTEXTURES;i++)
 751                 if (!gltexnuminuse[i])
 752                         break;
 753         if (i < MAX_GLTEXTURES)
 754                 gltexnuminuse[image->texnum = i] = true;
 755         else
 756                 Sys_Error("R_FindImageForTexture: ran out of GL textures\n");
 757         *imagechainpointer = image;
 758         image->texturecount++;
 759
 760         glt->x = x;
 761         glt->y = y;
 762         glt->image = image;
 763 }
 764
 765 // note: R_FindImageForTexture must be called before this
 766 static void R_UploadTexture (gltexture_t *glt)
 767 {
 768         if (!(glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL)))
 769                 return;
 770
 771         if (glt->flags & GLTEXF_PROCEDURAL)
 772         {
 773                 if (glt->generate)
 774                 {
 775                         if (texturebuffersize < glt->width * glt->height * glt->textype->inputbytesperpixel)
 776                         {
 777                                 if (texturebuffer)
 778                                         Mem_Free(texturebuffer);
 779                                 texturebuffersize = glt->width * glt->height * glt->textype->inputbytesperpixel;
 780                                 texturebuffer = Mem_Alloc(textureprocessingmempool, texturebuffersize);
 781                         }
 782
 783                         glt->generate(texturebuffer, glt->width, glt->height, (void *)glt->proceduraldata, glt->proceduraldatasize);
 784                 }
 785         }
 786         else
 787         {
 788                 R_Upload(glt, glt->inputtexels);
 789                 if (glt->inputtexels)
 790                 {
 791                         Mem_Free(glt->inputtexels);
 792                         glt->inputtexels = NULL;
 793                         glt->flags |= GLTEXF_DESTROYED;
 794                 }
 795                 else if (glt->flags & GLTEXF_DESTROYED)
 796                         Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 797         }
 798 }
 799
 800 static gltexture_t *R_SetupTexture(gltexturepool_t *pool, char *identifier, int crc, int width, int height, int flags, textypeinfo_t *texinfo, qbyte *data, int (*generate)(qbyte *buffer, int width, int height, void *proceduraldata, int proceduraldatasize), void *proceduraldata, int proceduraldatasize)
 801 {
 802         gltexture_t *glt;
 803         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
 804         if (identifier)
 805         {
 806                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
 807                 strcpy (glt->identifier, identifier);
 808         }
 809         else
 810                 glt->identifier = NULL;
 811         glt->pool = pool;
 812         glt->chain = pool->gltchain;
 813         pool->gltchain = glt;
 814         glt->crc = crc;
 815         glt->width = width;
 816         glt->height = height;
 817         glt->flags = flags;
 818         glt->textype = texinfo;
 819
 820         if (data)
 821         {
 822                 glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * texinfo->inputbytesperpixel);
 823                 if (glt->inputtexels == NULL)
 824                         Sys_Error("R_SetupTexture: out of memory\n");
 825                 memcpy(glt->inputtexels, data, glt->width * glt->height * texinfo->inputbytesperpixel);
 826         }
 827         else
 828                 glt->inputtexels = NULL;
 829
 830         glt->generate = generate;
 831         glt->proceduraldatasize = proceduraldatasize;
 832         if (proceduraldatasize)
 833         {
 834                 glt->proceduraldata = Mem_Alloc(texturemempool, proceduraldatasize);
 835                 if (glt->proceduraldata == NULL)
 836                         Sys_Error("R_SetupTexture: out of memory\n");
 837         }
 838         else
 839                 glt->proceduraldata = NULL;
 840
 841         R_FindImageForTexture(glt);
 842         R_PrecacheTexture(glt);
 843
 844         return glt;
 845 }
 846
 847 /*
 848 ================
 849 R_LoadTexture
 850 ================
 851 */
 852 rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, qbyte *data, int textype, int flags)
 853 {
 854         int i;
 855         gltexture_t *glt;
 856         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 857         textypeinfo_t *texinfo;
 858         unsigned short crc;
 859
 860         if (cls.state == ca_dedicated)
 861                 return NULL;
 862
 863         texinfo = R_GetTexTypeInfo(textype, flags);
 864
 865         if (flags & TEXF_FRAGMENT)
 866         {
 867                 if (width > block_size || height > block_size)
 868                         Host_Error("R_LoadTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
 869                 if ((width * texinfo->internalbytesperpixel) & 3)
 870                         Host_Error("R_LoadTexture: incompatible width for fragment");
 871         }
 872
 873         // clear the alpha flag if the texture has no transparent pixels
 874         switch(textype)
 875         {
 876         case TEXTYPE_QPALETTE:
 877                 if (flags & TEXF_ALPHA)
 878                 {
 879                         flags &= ~TEXF_ALPHA;
 880                         for (i = 0;i < width * height;i++)
 881                         {
 882                                 if (data[i] == 255)
 883                                 {
 884                                         flags |= TEXF_ALPHA;
 885                                         break;
 886                                 }
 887                         }
 888                 }
 889                 break;
 890         case TEXTYPE_RGB:
 891                 if (flags & TEXF_ALPHA)
 892                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
 893                 break;
 894         case TEXTYPE_RGBA:
 895                 if (flags & TEXF_ALPHA)
 896                 {
 897                         flags &= ~TEXF_ALPHA;
 898                         for (i = 0;i < width * height;i++)
 899                         {
 900                                 if (data[i * 4 + 3] < 255)
 901                                 {
 902                                         flags |= TEXF_ALPHA;
 903                                         break;
 904                                 }
 905                         }
 906                 }
 907                 break;
 908         default:
 909                 Host_Error("R_LoadTexture: unknown texture type\n");
 910         }
 911
 912         // LordHavoc: do a CRC to confirm the data really is the same as previous occurances.
 913         if (data == NULL)
 914                 crc = 0;
 915         else
 916                 crc = CRC_Block(data, width*height*texinfo->inputbytesperpixel);
 917
 918         // see if the texture is already present
 919         if (identifier && (glt = R_FindTexture(pool, identifier)))
 920         {
 921                 if (crc == glt->crc && width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
 922                 {
 923                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
 924                         return (rtexture_t *)glt; // exact match, use existing
 925                 }
 926                 Con_Printf("R_LoadTexture: cache mismatch on %s, replacing old texture\n", identifier);
 927                 R_FreeTexture(glt);
 928         }
 929
 930         return (rtexture_t *)R_SetupTexture(pool, identifier, crc, width, height, flags | GLTEXF_UPLOAD, texinfo, data, NULL, NULL, 0);
 931 }
 932
 933 rtexture_t *R_ProceduralTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, int textype, int flags, int (*generate)(qbyte *buffer, int width, int height, void *proceduraldata, int proceduraldatasize), void *proceduraldata, int proceduraldatasize)
 934 {
 935         gltexture_t             *glt;
 936         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 937         textypeinfo_t   *texinfo;
 938
 939         if (cls.state == ca_dedicated)
 940                 return NULL;
 941
 942         texinfo = R_GetTexTypeInfo(textype, flags);
 943
 944         if (flags & TEXF_FRAGMENT)
 945         {
 946                 if (width > block_size || height > block_size)
 947                         Host_Error("R_ProceduralTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
 948                 if ((width * texinfo->internalbytesperpixel) & 3)
 949                         Host_Error("R_ProceduralTexture: incompatible width for fragment");
 950         }
 951
 952         // see if the texture is already present
 953         if (identifier && (glt = R_FindTexture(pool, identifier)))
 954         {
 955                 if (width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
 956                 {
 957                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
 958                         return (rtexture_t *)glt; // exact match, use existing
 959                 }
 960                 Con_Printf("R_LoadTexture: cache mismatch, replacing old texture\n");
 961                 R_FreeTexture(glt);
 962         }
 963
 964         return (rtexture_t *)R_SetupTexture(pool, identifier, 0, width, height, flags | GLTEXF_PROCEDURAL | GLTEXF_UPLOAD, texinfo, NULL, generate, proceduraldata, proceduraldatasize);
 965 }
 966
 967 int R_TextureHasAlpha(rtexture_t *rt)
 968 {
 969         gltexture_t *glt;
 970         if (!rt)
 971                 return false;
 972         glt = (gltexture_t *)rt;
 973         return (glt->flags & TEXF_ALPHA) != 0;
 974 }
 975
 976 int R_TextureWidth(rtexture_t *rt)
 977 {
 978         if (!rt)
 979                 return false;
 980         return ((gltexture_t *)rt)->width;
 981 }
 982
 983 int R_TextureHeight(rtexture_t *rt)
 984 {
 985         if (!rt)
 986                 return false;
 987         return ((gltexture_t *)rt)->height;
 988 }
 989
 990 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
 991 {
 992         gltexture_t *glt;
 993         float iwidth, iheight;
 994         if (cls.state == ca_dedicated)
 995         {
 996                 if (x)
 997                         *x = 0;
 998                 if (y)
 999                         *y = 0;
1000                 if (fx1 || fy1 || fx2 || fy2)
1001                 {
1002                         if (fx1)
1003                                 *fx1 = 0;
1004                         if (fy1)
1005                                 *fy1 = 0;
1006                         if (fx2)
1007                                 *fx2 = 1;
1008                         if (fy2)
1009                                 *fy2 = 1;
1010                 }
1011                 return;
1012         }
1013         if (!rt)
1014                 Host_Error("R_FragmentLocation: no texture supplied\n");
1015         glt = (gltexture_t *)rt;
1016         if (glt->flags & TEXF_FRAGMENT)
1017         {
1018                 if (x)
1019                         *x = glt->x;
1020                 if (y)
1021                         *y = glt->y;
1022                 if (fx1 || fy1 || fx2 || fy2)
1023                 {
1024                         iwidth = 1.0f / glt->image->width;
1025                         iheight = 1.0f / glt->image->height;
1026                         if (fx1)
1027                                 *fx1 = glt->x * iwidth;
1028                         if (fy1)
1029                                 *fy1 = glt->y * iheight;
1030                         if (fx2)
1031                                 *fx2 = (glt->x + glt->width) * iwidth;
1032                         if (fy2)
1033                                 *fy2 = (glt->y + glt->height) * iheight;
1034                 }
1035         }
1036         else
1037         {
1038                 if (x)
1039                         *x = 0;
1040                 if (y)
1041                         *y = 0;
1042                 if (fx1 || fy1 || fx2 || fy2)
1043                 {
1044                         if (fx1)
1045                                 *fx1 = 0;
1046                         if (fy1)
1047                                 *fy1 = 0;
1048                         if (fx2)
1049                                 *fx2 = 1;
1050                         if (fy2)
1051                                 *fy2 = 1;
1052                 }
1053         }
1054 }
1055
1056 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1057 {
1058         textypeinfo_t *texinfo = R_GetTexTypeInfo(textype, flags);
1059         while ((width * texinfo->internalbytesperpixel) & 3)
1060                 width++;
1061         return width;
1062 }
1063
1064 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1065 {
1066         gltexture_t *glt;
1067         if (rt == NULL)
1068                 Host_Error("R_UpdateTexture: no texture supplied\n");
1069         if (data == NULL)
1070                 Host_Error("R_UpdateTexture: no data supplied\n");
1071         glt = (gltexture_t *)rt;
1072
1073         // if it has not been uploaded yet, update the data that will be used when it is
1074         if (glt->inputtexels)
1075                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1076         else
1077                 R_Upload(glt, data);
1078 }
1079