gl_textures.c

   1 #include "quakedef.h"
   2
   3 cvar_t  r_max_size = {CVAR_SAVE, "r_max_size", "2048"};
   4 cvar_t  r_max_scrapsize = {CVAR_SAVE, "r_max_scrapsize", "256"};
   5 cvar_t  r_picmip = {CVAR_SAVE, "r_picmip", "0"};
   6 cvar_t  r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1"};
   7 cvar_t  r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1"};
   8
   9 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR; //NEAREST;
  10 int             gl_filter_mag = GL_LINEAR;
  11
  12
  13 static mempool_t *texturemempool;
  14 static mempool_t *texturedatamempool;
  15 static mempool_t *textureprocessingmempool;
  16
  17 // note: this must not conflict with TEXF_ flags in r_textures.h
  18 // cleared when a texture is uploaded
  19 #define GLTEXF_UPLOAD 0x00010000
  20 // texture generated by code, also causes permanent GLTEXF_UPLOAD effect
  21 #define GLTEXF_PROCEDURAL 0x00020000
  22 // bitmask for mismatch checking
  23 #define GLTEXF_IMPORTANTBITS (GLTEXF_PROCEDURAL)
  24 // set when image is uploaded and freed
  25 #define GLTEXF_DESTROYED 0x00040000
  26
  27 // size of images which hold fragment textures, ignores picmip and max_size
  28 //#define BLOCK_SIZE 256
  29 static int block_size;
  30
  31 // really this number only governs gltexnuminuse
  32 #define MAX_GLTEXTURES 65536
  33
  34 // since there is only one set of GL texture numbers, we have to track them
  35 // globally, everything else is per texture pool
  36 static qbyte *gltexnuminuse;
  37
  38 typedef struct
  39 {
  40         int textype;
  41         int inputbytesperpixel;
  42         int internalbytesperpixel;
  43         int glformat;
  44         int glinternalformat;
  45         int align;
  46 }
  47 textypeinfo_t;
  48
  49 static textypeinfo_t textype_qpalette       = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 3, 1};
  50 static textypeinfo_t textype_rgb            = {TEXTYPE_RGB     , 3, 3, GL_RGB , 3, 3};
  51 static textypeinfo_t textype_rgba           = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 3, 1};
  52 static textypeinfo_t textype_qpalette_alpha = {TEXTYPE_QPALETTE, 1, 4, GL_RGBA, 4, 1};
  53 static textypeinfo_t textype_rgba_alpha     = {TEXTYPE_RGBA    , 4, 4, GL_RGBA, 4, 1};
  54
  55 // a tiling texture (most common type)
  56 #define GLIMAGETYPE_TILE 0
  57 // a fragments texture (contains one or more fragment textures)
  58 #define GLIMAGETYPE_FRAGMENTS 1
  59
  60 // a gltextureimage can have one (or more if fragments) gltextures inside
  61 typedef struct gltextureimage_s
  62 {
  63         struct gltextureimage_s *imagechain;
  64         int texturecount;
  65         int type; // one of the GLIMAGETYPE_ values
  66         int texnum; // GL texture slot number
  67         int width, height;
  68         int bytesperpixel; // bytes per pixel
  69         int glformat; // GL_RGB or GL_RGBA
  70         int glinternalformat; // 3 or 4
  71         int flags;
  72         short *blockallocation; // fragment allocation
  73 }
  74 gltextureimage_t;
  75
  76 typedef struct gltexture_s
  77 {
  78         // pointer to texturepool (check this to see if the texture is allocated)
  79         struct gltexturepool_s *pool;
  80         // pointer to next texture in texturepool chain
  81         struct gltexture_s *chain;
  82         // pointer into gltextureimage array
  83         gltextureimage_t *image;
  84         // name of the texture (this might be removed someday), no duplicates
  85         char *identifier;
  86         // location in the image, and size
  87         int x, y, width, height;
  88         // copy of the original texture supplied to the upload function, for re-uploading or deferred uploads (non-precached)
  89         qbyte *inputtexels;
  90         // to identify cache mismatchs (this might be removed someday)
  91         int crc;
  92         // flags supplied to the LoadTexture/ProceduralTexture functions
  93         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
  94         int flags;
  95         // procedural texture generation function, called once per frame if the texture is used
  96         int (*generate)(qbyte *buffer, int width, int height, void *parameterdata, int parameterdatasize);
  97         // data provided to generate, persistent from call to call
  98         qbyte *proceduraldata;
  99         // size of data
 100         int proceduraldatasize;
 101         // used only to avoid updating the texture more than once per frame
 102         int proceduralframecount;
 103         // pointer to one of the textype_ structs
 104         textypeinfo_t *textype;
 105 }
 106 gltexture_t;
 107
 108 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
 109
 110 typedef struct gltexturepool_s
 111 {
 112         int sentinel;
 113         struct gltextureimage_s *imagechain;
 114         struct gltexture_s *gltchain;
 115         struct gltexturepool_s *next;
 116 }
 117 gltexturepool_t;
 118
 119 static gltexturepool_t *gltexturepoolchain = NULL;
 120
 121 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
 122 static int resizebuffersize = 0;
 123 static qbyte *texturebuffer;
 124 static int texturebuffersize = 0;
 125
 126 static int realmaxsize = 0;
 127
 128 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 129 {
 130         if (flags & TEXF_ALPHA)
 131         {
 132                 switch(textype)
 133                 {
 134                 case TEXTYPE_QPALETTE:
 135                         return &textype_qpalette_alpha;
 136                 case TEXTYPE_RGB:
 137                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
 138                         return NULL;
 139                 case TEXTYPE_RGBA:
 140                         return &textype_rgba_alpha;
 141                 default:
 142                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 143                         return NULL;
 144                 }
 145         }
 146         else
 147         {
 148                 switch(textype)
 149                 {
 150                 case TEXTYPE_QPALETTE:
 151                         return &textype_qpalette;
 152                 case TEXTYPE_RGB:
 153                         return &textype_rgb;
 154                 case TEXTYPE_RGBA:
 155                         return &textype_rgba;
 156                 default:
 157                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 158                         return NULL;
 159                 }
 160         }
 161 }
 162
 163 static void R_UploadTexture(gltexture_t *t);
 164
 165 static void R_PrecacheTexture(gltexture_t *glt)
 166 {
 167         int precache;
 168         precache = false;
 169         if (glt->flags & TEXF_ALWAYSPRECACHE)
 170                 precache = true;
 171         else if (r_precachetextures.integer >= 2)
 172                 precache = true;
 173         else if (r_precachetextures.integer >= 1)
 174                 if (glt->flags & TEXF_PRECACHE)
 175                         precache = true;
 176
 177         if (precache)
 178                 R_UploadTexture(glt);
 179 }
 180
 181 int R_GetTexture(rtexture_t *rt)
 182 {
 183         gltexture_t *glt;
 184         if (!rt)
 185                 return 0;
 186         glt = (gltexture_t *)rt;
 187         if (glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL))
 188         {
 189                 if (glt->flags & GLTEXF_PROCEDURAL)
 190                 {
 191                         if (glt->proceduralframecount != r_framecount)
 192                         {
 193                                 glt->proceduralframecount = r_framecount;
 194                                 R_UploadTexture(glt);
 195                         }
 196                 }
 197                 else
 198                         R_UploadTexture(glt);
 199         }
 200         return glt->image->texnum;
 201 }
 202
 203 static void R_FreeTexture(gltexture_t *glt)
 204 {
 205         gltexture_t **gltpointer;
 206         gltextureimage_t *image, **gltimagepointer;
 207         GLuint texnum;
 208
 209         if (glt == NULL)
 210                 Host_Error("R_FreeTexture: texture == NULL\n");
 211
 212         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 213         if (*gltpointer == glt)
 214                 *gltpointer = glt->chain;
 215         else
 216                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
 217
 218         // note: if freeing a fragment texture, this will not make the claimed
 219         // space available for new textures unless all other fragments in the
 220         // image are also freed
 221         image = glt->image;
 222         image->texturecount--;
 223         if (image->texturecount < 1)
 224         {
 225                 for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 226                 if (*gltimagepointer == image)
 227                         *gltimagepointer = image->imagechain;
 228                 else
 229                         Host_Error("R_FreeTexture: image not linked in pool\n");
 230                 if (image->texnum)
 231                 {
 232                         texnum = image->texnum;
 233                         gltexnuminuse[image->texnum] = 0;
 234                         glDeleteTextures(1, &texnum);
 235                 }
 236                 if (image->blockallocation)
 237                         Mem_Free(image->blockallocation);
 238                 Mem_Free(image);
 239         }
 240
 241         if (glt->identifier)
 242                 Mem_Free(glt->identifier);
 243         if (glt->inputtexels)
 244                 Mem_Free(glt->inputtexels);
 245         if (glt->proceduraldata)
 246                 Mem_Free(glt->proceduraldata);
 247         Mem_Free(glt);
 248 }
 249
 250 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 251 {
 252         gltexture_t     *glt;
 253
 254         if (!identifier)
 255                 return NULL;
 256
 257         for (glt = pool->gltchain;glt;glt = glt->chain)
 258                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 259                         return glt;
 260
 261         return NULL;
 262 }
 263
 264 rtexturepool_t *R_AllocTexturePool(void)
 265 {
 266         gltexturepool_t *pool;
 267         if (texturemempool == NULL)
 268                 return NULL;
 269         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 270         if (pool == NULL)
 271                 return NULL;
 272         //memset(pool, 0, sizeof(gltexturepool_t));
 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                                 glBindTexture(GL_TEXTURE_2D, image->texnum);
 364                                 if (image->flags & TEXF_MIPMAP)
 365                                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 366                                 else
 367                                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 368                                 glTexParameterf(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         glGetIntegerv(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         //memset(gltexnuminuse, 0, MAX_GLTEXTURES);
 476 }
 477
 478 static void r_textures_shutdown(void)
 479 {
 480         rtexturepool_t *temp;
 481         while(gltexturepoolchain)
 482         {
 483                 temp = (rtexturepool_t *) gltexturepoolchain;
 484                 R_FreeTexturePool(&temp);
 485         }
 486
 487         /*
 488         if (resizebuffer) Mem_Free(resizebuffer);resizebuffer = NULL;
 489         if (colorconvertbuffer) Mem_Free(colorconvertbuffer);colorconvertbuffer = NULL;
 490         if (texturebuffer) Mem_Free(texturebuffer);texturebuffer = NULL;
 491         if (gltexnuminuse) Mem_Free(gltexnuminuse);gltexnuminuse = NULL;
 492         */
 493         resizebuffersize = 0;
 494         texturebuffersize = 0;
 495         resizebuffer = NULL;
 496         colorconvertbuffer = NULL;
 497         texturebuffer = NULL;
 498         gltexnuminuse = NULL;
 499         Mem_FreePool(&texturemempool);
 500         Mem_FreePool(&texturedatamempool);
 501         Mem_FreePool(&textureprocessingmempool);
 502 }
 503
 504 static void r_textures_newmap(void)
 505 {
 506 }
 507
 508 void R_Textures_Init (void)
 509 {
 510         Cmd_AddCommand ("gl_texturemode", &GL_TextureMode_f);
 511         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 512         Cvar_RegisterVariable (&r_max_scrapsize);
 513         Cvar_RegisterVariable (&r_max_size);
 514         Cvar_RegisterVariable (&r_picmip);
 515         Cvar_RegisterVariable (&r_lerpimages);
 516         Cvar_RegisterVariable (&r_precachetextures);
 517         gltexnuminuse = NULL;
 518
 519         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 520 }
 521
 522 static void R_Upload(gltexture_t *glt, qbyte *data)
 523 {
 524         int mip, width, height, internalformat;
 525         qbyte *prevbuffer;
 526         prevbuffer = data;
 527
 528         glBindTexture(GL_TEXTURE_2D, glt->image->texnum);
 529         CHECKGLERROR
 530
 531         gl_backend_rebindtextures = true;
 532
 533         glt->flags &= ~GLTEXF_UPLOAD;
 534
 535         if (glt->flags & TEXF_FRAGMENT)
 536         {
 537                 if (resizebuffersize < glt->image->width * glt->image->height * glt->image->bytesperpixel)
 538                 {
 539                         resizebuffersize = glt->image->width * glt->image->height * glt->image->bytesperpixel;
 540                         if (resizebuffer)
 541                                 Mem_Free(resizebuffer);
 542                         if (colorconvertbuffer)
 543                                 Mem_Free(colorconvertbuffer);
 544                         resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 545                         colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 546                         if (!resizebuffer || !colorconvertbuffer)
 547                                 Host_Error("R_Upload: out of memory\n");
 548                 }
 549
 550                 if (glt->image->flags & GLTEXF_UPLOAD)
 551                 {
 552                         Con_DPrintf("uploaded new fragments image\n");
 553                         glt->image->flags &= ~GLTEXF_UPLOAD;
 554                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->bytesperpixel);
 555                         glTexImage2D (GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
 556                         CHECKGLERROR
 557                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 558                         CHECKGLERROR
 559                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 560                         CHECKGLERROR
 561                 }
 562
 563                 if (prevbuffer == NULL)
 564                 {
 565                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->bytesperpixel);
 566                         prevbuffer = resizebuffer;
 567                 }
 568                 else if (glt->textype->textype == TEXTYPE_QPALETTE)
 569                 {
 570                         // promote paletted to RGBA, so we only have to worry about RGB and
 571                         // RGBA in the rest of this code
 572                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
 573                         prevbuffer = colorconvertbuffer;
 574                 }
 575
 576                 glTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 577                 CHECKGLERROR
 578                 return;
 579         }
 580
 581         glt->image->flags &= ~GLTEXF_UPLOAD;
 582
 583         // these are rounded up versions of the size to do better resampling
 584         for (width = 1;width < glt->width;width <<= 1);
 585         for (height = 1;height < glt->height;height <<= 1);
 586
 587         if (resizebuffersize < width * height * glt->image->bytesperpixel)
 588         {
 589                 resizebuffersize = width * height * glt->image->bytesperpixel;
 590                 if (resizebuffer)
 591                         Mem_Free(resizebuffer);
 592                 if (colorconvertbuffer)
 593                         Mem_Free(colorconvertbuffer);
 594                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 595                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
 596                 if (!resizebuffer || !colorconvertbuffer)
 597                         Host_Error("R_Upload: out of memory\n");
 598         }
 599
 600         if (prevbuffer == NULL)
 601         {
 602                 width = glt->image->width;
 603                 height = glt->image->height;
 604                 memset(resizebuffer, 255, width * height * glt->image->bytesperpixel);
 605                 prevbuffer = resizebuffer;
 606         }
 607         else
 608         {
 609                 if (glt->textype->textype == TEXTYPE_QPALETTE)
 610                 {
 611                         // promote paletted to RGBA, so we only have to worry about RGB and
 612                         // RGBA in the rest of this code
 613                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
 614                         prevbuffer = colorconvertbuffer;
 615                 }
 616
 617                 if (glt->width != width || glt->height != height)
 618                 {
 619                         Image_Resample(prevbuffer, glt->width, glt->height, resizebuffer, width, height, glt->image->bytesperpixel, r_lerpimages.integer);
 620                         prevbuffer = resizebuffer;
 621                 }
 622
 623                 // apply picmip/max_size limitations
 624                 while (width > glt->image->width || height > glt->image->height)
 625                 {
 626                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, glt->image->width, glt->image->height, glt->image->bytesperpixel);
 627                         prevbuffer = resizebuffer;
 628                 }
 629         }
 630
 631         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
 632         internalformat = 3;
 633         if (glt->flags & TEXF_ALPHA)
 634                 internalformat = 4;
 635
 636         mip = 0;
 637         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 638         CHECKGLERROR
 639         if (glt->flags & TEXF_MIPMAP)
 640         {
 641                 while (width > 1 || height > 1)
 642                 {
 643                         Image_MipReduce(prevbuffer, resizebuffer, &width, &height, 1, 1, glt->image->bytesperpixel);
 644                         prevbuffer = resizebuffer;
 645
 646                         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
 647                         CHECKGLERROR
 648                 }
 649
 650                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 651                 CHECKGLERROR
 652                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 653                 CHECKGLERROR
 654         }
 655         else
 656         {
 657                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 658                 CHECKGLERROR
 659                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 660                 CHECKGLERROR
 661         }
 662 }
 663
 664 static void R_FindImageForTexture(gltexture_t *glt)
 665 {
 666         int i, j, best, best2, x, y, w, h;
 667         textypeinfo_t *texinfo;
 668         gltexturepool_t *pool;
 669         gltextureimage_t *image, **imagechainpointer;
 670         texinfo = glt->textype;
 671         pool = glt->pool;
 672
 673         x = 0;
 674         y = 0;
 675         w = glt->width;
 676         h = glt->height;
 677         if (glt->flags & TEXF_FRAGMENT)
 678         {
 679                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
 680                 {
 681                         image = *imagechainpointer;
 682                         if (image->type != GLIMAGETYPE_FRAGMENTS)
 683                                 continue;
 684                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
 685                                 continue;
 686
 687                         // got a fragments texture, find a place in it if we can
 688                         best = block_size;
 689                         for (best = block_size, i = 0;i < block_size - w;i += texinfo->align)
 690                         {
 691                                 for (best2 = 0, j = 0;j < w;j++)
 692                                 {
 693                                         if (image->blockallocation[i+j] >= best)
 694                                                 break;
 695                                         if (best2 < image->blockallocation[i+j])
 696                                                 best2 = image->blockallocation[i+j];
 697                                 }
 698                                 if (j == w)
 699                                 {
 700                                         // this is a valid spot
 701                                         x = i;
 702                                         y = best = best2;
 703                                 }
 704                         }
 705
 706                         if (best + h > block_size)
 707                                 continue;
 708
 709                         for (i = 0;i < w;i++)
 710                                 image->blockallocation[x + i] = best + h;
 711
 712                         glt->x = x;
 713                         glt->y = y;
 714                         glt->image = image;
 715                         image->texturecount++;
 716                         return;
 717                 }
 718
 719                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 720                 if (image == NULL)
 721                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 722                 //memset(image, 0, sizeof(*image));
 723                 image->type = GLIMAGETYPE_FRAGMENTS;
 724                 image->width = block_size;
 725                 image->height = block_size;
 726                 image->blockallocation = Mem_Alloc(texturemempool, block_size * sizeof(short));
 727                 memset(image->blockallocation, 0, block_size * sizeof(short));
 728
 729                 x = 0;
 730                 y = 0;
 731                 for (i = 0;i < w;i++)
 732                         image->blockallocation[x + i] = y + h;
 733         }
 734         else
 735         {
 736                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
 737
 738                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
 739                 if (image == NULL)
 740                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
 741                 //memset(image, 0, sizeof(*image));
 742                 image->type = GLIMAGETYPE_TILE;
 743                 image->blockallocation = NULL;
 744
 745                 // calculate final size
 746                 if (r_max_size.integer > realmaxsize)
 747                         Cvar_SetValue("r_max_size", realmaxsize);
 748                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
 749                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
 750                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
 751                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
 752                 if (image->width < 1) image->width = 1;
 753                 if (image->height < 1) image->height = 1;
 754         }
 755         image->glinternalformat = texinfo->glinternalformat;
 756         image->glformat = texinfo->glformat;
 757         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA)) | GLTEXF_UPLOAD;
 758         image->bytesperpixel = texinfo->internalbytesperpixel;
 759         for (i = 1;i < MAX_GLTEXTURES;i++)
 760                 if (!gltexnuminuse[i])
 761                         break;
 762         if (i < MAX_GLTEXTURES)
 763                 gltexnuminuse[image->texnum = i] = true;
 764         else
 765                 Sys_Error("R_FindImageForTexture: ran out of GL textures\n");
 766         *imagechainpointer = image;
 767         image->texturecount++;
 768
 769         glt->x = x;
 770         glt->y = y;
 771         glt->image = image;
 772 }
 773
 774 // note: R_FindImageForTexture must be called before this
 775 static void R_UploadTexture (gltexture_t *glt)
 776 {
 777         if (!(glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL)))
 778                 return;
 779
 780         if (glt->flags & GLTEXF_PROCEDURAL)
 781         {
 782                 if (glt->generate)
 783                 {
 784                         if (texturebuffersize < glt->width * glt->height * glt->textype->inputbytesperpixel)
 785                         {
 786                                 if (texturebuffer)
 787                                         Mem_Free(texturebuffer);
 788                                 texturebuffersize = glt->width * glt->height * glt->textype->inputbytesperpixel;
 789                                 texturebuffer = Mem_Alloc(textureprocessingmempool, texturebuffersize);
 790                         }
 791
 792                         glt->generate(texturebuffer, glt->width, glt->height, (void *)glt->proceduraldata, glt->proceduraldatasize);
 793                 }
 794         }
 795         else
 796         {
 797                 R_Upload(glt, glt->inputtexels);
 798                 if (glt->inputtexels)
 799                 {
 800                         Mem_Free(glt->inputtexels);
 801                         glt->inputtexels = NULL;
 802                         glt->flags |= GLTEXF_DESTROYED;
 803                 }
 804                 else if (glt->flags & GLTEXF_DESTROYED)
 805                         Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
 806         }
 807 }
 808
 809 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)
 810 {
 811         gltexture_t *glt;
 812         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
 813         //memset(glt, 0, sizeof(gltexture_t));
 814         if (identifier)
 815         {
 816                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
 817                 strcpy (glt->identifier, identifier);
 818         }
 819         else
 820                 glt->identifier = NULL;
 821         glt->pool = pool;
 822         glt->chain = pool->gltchain;
 823         pool->gltchain = glt;
 824         glt->crc = crc;
 825         glt->width = width;
 826         glt->height = height;
 827         glt->flags = flags;
 828         glt->textype = texinfo;
 829
 830         if (data)
 831         {
 832                 glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * texinfo->inputbytesperpixel);
 833                 if (glt->inputtexels == NULL)
 834                         Sys_Error("R_SetupTexture: out of memory\n");
 835                 memcpy(glt->inputtexels, data, glt->width * glt->height * texinfo->inputbytesperpixel);
 836         }
 837         else
 838                 glt->inputtexels = NULL;
 839
 840         glt->generate = generate;
 841         glt->proceduraldatasize = proceduraldatasize;
 842         if (proceduraldatasize)
 843         {
 844                 glt->proceduraldata = Mem_Alloc(texturemempool, proceduraldatasize);
 845                 if (glt->proceduraldata == NULL)
 846                         Sys_Error("R_SetupTexture: out of memory\n");
 847         }
 848         else
 849                 glt->proceduraldata = NULL;
 850
 851         R_FindImageForTexture(glt);
 852         R_PrecacheTexture(glt);
 853
 854         return glt;
 855 }
 856
 857 /*
 858 ================
 859 R_LoadTexture
 860 ================
 861 */
 862 rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, qbyte *data, int textype, int flags)
 863 {
 864         int i;
 865         gltexture_t *glt;
 866         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 867         textypeinfo_t *texinfo;
 868         unsigned short crc;
 869
 870         if (cls.state == ca_dedicated)
 871                 return NULL;
 872
 873         texinfo = R_GetTexTypeInfo(textype, flags);
 874
 875         // data can be NULL
 876 //      if (data == NULL)
 877 //              Host_Error("R_LoadTexture: \"%s\" has no data\n", identifier);
 878
 879         if (flags & TEXF_FRAGMENT)
 880         {
 881                 if (width > block_size || height > block_size)
 882                         Host_Error("R_LoadTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
 883                 if ((width * texinfo->internalbytesperpixel) & 3)
 884                         Host_Error("R_LoadTexture: incompatible width for fragment");
 885         }
 886
 887         // clear the alpha flag if the texture has no transparent pixels
 888         switch(textype)
 889         {
 890         case TEXTYPE_QPALETTE:
 891                 if (flags & TEXF_ALPHA)
 892                 {
 893                         flags &= ~TEXF_ALPHA;
 894                         for (i = 0;i < width * height;i++)
 895                         {
 896                                 if (data[i] == 255)
 897                                 {
 898                                         flags |= TEXF_ALPHA;
 899                                         break;
 900                                 }
 901                         }
 902                 }
 903                 break;
 904         case TEXTYPE_RGB:
 905                 if (flags & TEXF_ALPHA)
 906                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
 907                 break;
 908         case TEXTYPE_RGBA:
 909                 if (flags & TEXF_ALPHA)
 910                 {
 911                         flags &= ~TEXF_ALPHA;
 912                         for (i = 0;i < width * height;i++)
 913                         {
 914                                 if (data[i * 4 + 3] < 255)
 915                                 {
 916                                         flags |= TEXF_ALPHA;
 917                                         break;
 918                                 }
 919                         }
 920                 }
 921                 break;
 922         default:
 923                 Host_Error("R_LoadTexture: unknown texture type\n");
 924         }
 925
 926         // LordHavoc: do a CRC to confirm the data really is the same as previous occurances.
 927         if (data == NULL)
 928                 crc = 0;
 929         else
 930                 crc = CRC_Block(data, width*height*texinfo->inputbytesperpixel);
 931
 932         // see if the texture is already present
 933         if (identifier && (glt = R_FindTexture(pool, identifier)))
 934         {
 935                 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)
 936                 {
 937                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
 938                         return (rtexture_t *)glt; // exact match, use existing
 939                 }
 940                 Con_Printf("R_LoadTexture: cache mismatch on %s, replacing old texture\n", identifier);
 941                 R_FreeTexture(glt);
 942         }
 943
 944         return (rtexture_t *)R_SetupTexture(pool, identifier, crc, width, height, flags | GLTEXF_UPLOAD, texinfo, data, NULL, NULL, 0);
 945 }
 946
 947 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)
 948 {
 949         gltexture_t             *glt;
 950         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
 951         textypeinfo_t   *texinfo;
 952
 953         if (cls.state == ca_dedicated)
 954                 return NULL;
 955
 956         texinfo = R_GetTexTypeInfo(textype, flags);
 957
 958         // no function is supported, for odd uses
 959 //      if (generate == NULL)
 960 //              Host_Error("R_ProceduralTexture: \"%s\" has no generate function\n", identifier);
 961         if (flags & TEXF_FRAGMENT)
 962         {
 963                 if (width > block_size || height > block_size)
 964                         Host_Error("R_ProceduralTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
 965                 if ((width * texinfo->internalbytesperpixel) & 3)
 966                         Host_Error("R_ProceduralTexture: incompatible width for fragment");
 967         }
 968
 969         // see if the texture is already present
 970         if (identifier && (glt = R_FindTexture(pool, identifier)))
 971         {
 972                 if (width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
 973                 {
 974                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
 975                         return (rtexture_t *)glt; // exact match, use existing
 976                 }
 977                 Con_Printf("R_LoadTexture: cache mismatch, replacing old texture\n");
 978                 R_FreeTexture(glt);
 979         }
 980
 981         return (rtexture_t *)R_SetupTexture(pool, identifier, 0, width, height, flags | GLTEXF_PROCEDURAL | GLTEXF_UPLOAD, texinfo, NULL, generate, proceduraldata, proceduraldatasize);
 982 }
 983
 984 int R_TextureHasAlpha(rtexture_t *rt)
 985 {
 986         gltexture_t *glt;
 987         if (!rt)
 988                 return false;
 989         glt = (gltexture_t *)rt;
 990         return (glt->flags & TEXF_ALPHA) != 0;
 991 }
 992
 993 int R_TextureWidth(rtexture_t *rt)
 994 {
 995         if (!rt)
 996                 return false;
 997         return ((gltexture_t *)rt)->width;
 998 }
 999
1000 int R_TextureHeight(rtexture_t *rt)
1001 {
1002         if (!rt)
1003                 return false;
1004         return ((gltexture_t *)rt)->height;
1005 }
1006
1007 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1008 {
1009         gltexture_t *glt;
1010         float iwidth, iheight;
1011         if (cls.state == ca_dedicated)
1012         {
1013                 if (x)
1014                         *x = 0;
1015                 if (y)
1016                         *y = 0;
1017                 if (fx1 || fy1 || fx2 || fy2)
1018                 {
1019                         if (fx1)
1020                                 *fx1 = 0;
1021                         if (fy1)
1022                                 *fy1 = 0;
1023                         if (fx2)
1024                                 *fx2 = 1;
1025                         if (fy2)
1026                                 *fy2 = 1;
1027                 }
1028                 return;
1029         }
1030         if (!rt)
1031                 Host_Error("R_FragmentLocation: no texture supplied\n");
1032         glt = (gltexture_t *)rt;
1033         if (glt->flags & TEXF_FRAGMENT)
1034         {
1035                 if (x)
1036                         *x = glt->x;
1037                 if (y)
1038                         *y = glt->y;
1039                 if (fx1 || fy1 || fx2 || fy2)
1040                 {
1041                         iwidth = 1.0f / glt->image->width;
1042                         iheight = 1.0f / glt->image->height;
1043                         if (fx1)
1044                                 *fx1 = glt->x * iwidth;
1045                         if (fy1)
1046                                 *fy1 = glt->y * iheight;
1047                         if (fx2)
1048                                 *fx2 = (glt->x + glt->width) * iwidth;
1049                         if (fy2)
1050                                 *fy2 = (glt->y + glt->height) * iheight;
1051                 }
1052         }
1053         else
1054         {
1055                 if (x)
1056                         *x = 0;
1057                 if (y)
1058                         *y = 0;
1059                 if (fx1 || fy1 || fx2 || fy2)
1060                 {
1061                         if (fx1)
1062                                 *fx1 = 0;
1063                         if (fy1)
1064                                 *fy1 = 0;
1065                         if (fx2)
1066                                 *fx2 = 1;
1067                         if (fy2)
1068                                 *fy2 = 1;
1069                 }
1070         }
1071 }
1072
1073 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1074 {
1075         textypeinfo_t *texinfo = R_GetTexTypeInfo(textype, flags);
1076         while ((width * texinfo->internalbytesperpixel) & 3)
1077                 width++;
1078         return width;
1079 }
1080
1081 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1082 {
1083         gltexture_t *glt;
1084         if (rt == NULL)
1085                 Host_Error("R_UpdateTexture: no texture supplied\n");
1086         if (data == NULL)
1087                 Host_Error("R_UpdateTexture: no data supplied\n");
1088         glt = (gltexture_t *)rt;
1089         /*
1090         if (!(glt->flags & GLTEXF_PROCEDURAL))
1091         {
1092                 if (glt->inputtexels == NULL)
1093                 {
1094                         glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * glt->textype->inputbytesperpixel);
1095                         if (glt->inputtexels == NULL)
1096                                 Host_Error("R_UpdateTexture: ran out of memory\n");
1097                 }
1098                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1099         }
1100         R_Upload(glt, data);
1101         */
1102         // if it has not been uploaded yet, update the data that will be used when it is
1103         if (glt->inputtexels)
1104                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1105         else
1106                 R_Upload(glt, data);
1107 }
1108