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 byte *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         byte *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)(byte *buffer, int width, int height, void *parameterdata, int parameterdatasize);
  97         // data provided to generate, persistent from call to call
  98         byte *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 byte *resamplerow1 = NULL, *resamplerow2 = NULL;
 122 static int resamplerowsize = 0;
 123 static byte *resizebuffer = NULL, *colorconvertbuffer;
 124 static int resizebuffersize = 0;
 125 static byte *texturebuffer;
 126 static int texturebuffersize = 0;
 127
 128 static int realmaxsize = 0;
 129
 130 static textypeinfo_t *R_GetTexTypeInfo(int textype, int flags)
 131 {
 132         if (flags & TEXF_ALPHA)
 133         {
 134                 switch(textype)
 135                 {
 136                 case TEXTYPE_QPALETTE:
 137                         return &textype_qpalette_alpha;
 138                 case TEXTYPE_RGB:
 139                         Host_Error("R_GetTexTypeInfo: RGB format has no alpha, TEXF_ALPHA not allowed\n");
 140                         return NULL;
 141                 case TEXTYPE_RGBA:
 142                         return &textype_rgba_alpha;
 143                 default:
 144                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 145                         return NULL;
 146                 }
 147         }
 148         else
 149         {
 150                 switch(textype)
 151                 {
 152                 case TEXTYPE_QPALETTE:
 153                         return &textype_qpalette;
 154                 case TEXTYPE_RGB:
 155                         return &textype_rgb;
 156                 case TEXTYPE_RGBA:
 157                         return &textype_rgba;
 158                 default:
 159                         Host_Error("R_GetTexTypeInfo: unknown texture format\n");
 160                         return NULL;
 161                 }
 162         }
 163 }
 164
 165 static void R_UploadTexture(gltexture_t *t);
 166
 167 static void R_PrecacheTexture(gltexture_t *glt)
 168 {
 169         int precache;
 170         precache = false;
 171         if (glt->flags & TEXF_ALWAYSPRECACHE)
 172                 precache = true;
 173         else if (r_precachetextures.integer >= 2)
 174                 precache = true;
 175         else if (r_precachetextures.integer >= 1)
 176                 if (glt->flags & TEXF_PRECACHE)
 177                         precache = true;
 178
 179         if (precache)
 180                 R_UploadTexture(glt);
 181 }
 182
 183 int R_GetTexture(rtexture_t *rt)
 184 {
 185         gltexture_t *glt;
 186         if (!rt)
 187                 return 0;
 188         glt = (gltexture_t *)rt;
 189         if (glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL))
 190         {
 191                 if (glt->flags & GLTEXF_PROCEDURAL)
 192                 {
 193                         if (glt->proceduralframecount != r_framecount)
 194                         {
 195                                 glt->proceduralframecount = r_framecount;
 196                                 R_UploadTexture(glt);
 197                         }
 198                 }
 199                 else
 200                         R_UploadTexture(glt);
 201         }
 202         return glt->image->texnum;
 203 }
 204
 205 static void R_FreeTexture(gltexture_t *glt)
 206 {
 207         gltexture_t **gltpointer;
 208         gltextureimage_t *image, **gltimagepointer;
 209         GLuint texnum;
 210
 211         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 212         if (*gltpointer == glt)
 213                 *gltpointer = glt->chain;
 214         else
 215                 Host_Error("R_FreeTexture: texture not linked in pool\n");
 216
 217         // note: if freeing a fragment texture, this will not make the claimed
 218         // space available for new textures unless all other fragments in the
 219         // image are also freed
 220         image = glt->image;
 221         image->texturecount--;
 222         if (image->texturecount < 1)
 223         {
 224                 for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 225                 if (*gltimagepointer == image)
 226                         *gltimagepointer = image->imagechain;
 227                 else
 228                         Host_Error("R_FreeTexture: image not linked in pool\n");
 229                 if (image->texnum)
 230                 {
 231                         texnum = image->texnum;
 232                         gltexnuminuse[image->texnum] = 0;
 233                         glDeleteTextures(1, &texnum);
 234                 }
 235                 if (image->blockallocation)
 236                         Mem_Free(image->blockallocation);
 237                 Mem_Free(image);
 238         }
 239
 240         if (glt->identifier)
 241                 Mem_Free(glt->identifier);
 242         if (glt->inputtexels)
 243                 Mem_Free(glt->inputtexels);
 244         if (glt->proceduraldata)
 245                 Mem_Free(glt->proceduraldata);
 246         Mem_Free(glt);
 247 }
 248
 249 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 250 {
 251         gltexture_t     *glt;
 252
 253         if (!identifier)
 254                 return NULL;
 255
 256         for (glt = pool->gltchain;glt;glt = glt->chain)
 257                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 258                         return glt;
 259
 260         return NULL;
 261 }
 262
 263 rtexturepool_t *R_AllocTexturePool(void)
 264 {
 265         gltexturepool_t *pool;
 266         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 267         if (pool == NULL)
 268                 return NULL;
 269         //memset(pool, 0, sizeof(gltexturepool_t));
 270         pool->next = gltexturepoolchain;
 271         gltexturepoolchain = pool;
 272         pool->sentinel = TEXTUREPOOL_SENTINEL;
 273         return (rtexturepool_t *)pool;
 274 }
 275
 276 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 277 {
 278         gltexturepool_t *pool, **poolpointer;
 279         if (rtexturepool == NULL)
 280                 return;
 281         if (*rtexturepool == NULL)
 282                 return;
 283         pool = (gltexturepool_t *)(*rtexturepool);
 284         *rtexturepool = NULL;
 285         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 286                 Host_Error("R_FreeTexturePool: pool already freed\n");
 287         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 288         if (*poolpointer == pool)
 289                 *poolpointer = pool->next;
 290         else
 291                 Host_Error("R_FreeTexturePool: pool not linked\n");
 292         while (pool->gltchain)
 293                 R_FreeTexture(pool->gltchain);
 294         if (pool->imagechain)
 295                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 296         Mem_Free(pool);
 297 }
 298
 299
 300 typedef struct
 301 {
 302         char *name;
 303         int minification, magnification;
 304 }
 305 glmode_t;
 306
 307 static glmode_t modes[] =
 308 {
 309         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 310         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 311         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 312         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 313         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 314         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 315 };
 316
 317 static void GL_TextureMode_f (void)
 318 {
 319         int i;
 320         gltextureimage_t *image;
 321         gltexturepool_t *pool;
 322
 323         if (Cmd_Argc() == 1)
 324         {
 325                 for (i = 0;i < 6;i++)
 326                 {
 327                         if (gl_filter_min == modes[i].minification)
 328                         {
 329                                 Con_Printf ("%s\n", modes[i].name);
 330                                 return;
 331                         }
 332                 }
 333                 Con_Printf ("current filter is unknown???\n");
 334                 return;
 335         }
 336
 337         for (i = 0;i < 6;i++)
 338                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 339                         break;
 340         if (i == 6)
 341         {
 342                 Con_Printf ("bad filter name\n");
 343                 return;
 344         }
 345
 346         gl_filter_min = modes[i].minification;
 347         gl_filter_mag = modes[i].magnification;
 348
 349         // change all the existing mipmap texture objects
 350         // FIXME: force renderer(/client/something?) restart instead?
 351         for (pool = gltexturepoolchain;pool;pool = pool->next)
 352         {
 353                 for (image = pool->imagechain;image;image = image->imagechain)
 354                 {
 355                         // only update already uploaded images
 356                         if (!(image->flags & GLTEXF_UPLOAD))
 357                         {
 358                                 glBindTexture(GL_TEXTURE_2D, image->texnum);
 359                                 if (image->flags & TEXF_MIPMAP)
 360                                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 361                                 else
 362                                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 363                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 364                         }
 365                 }
 366         }
 367 }
 368
 369 static int R_CalcTexelDataSize (gltexture_t *glt)
 370 {
 371         int width2, height2, size;
 372         if (glt->flags & TEXF_FRAGMENT)
 373                 size = glt->width * glt->height;
 374         else
 375         {
 376                 if (r_max_size.integer > realmaxsize)
 377                         Cvar_SetValue("r_max_size", realmaxsize);
 378                 // calculate final size
 379                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 380                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 381                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
 382                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
 383                 if (width2 < 1) width2 = 1;
 384                 if (height2 < 1) height2 = 1;
 385
 386                 size = 0;
 387                 if (glt->flags & TEXF_MIPMAP)
 388                 {
 389                         while (width2 > 1 || height2 > 1)
 390                         {
 391                                 size += width2 * height2;
 392                                 if (width2 > 1)
 393                                         width2 >>= 1;
 394                                 if (height2 > 1)
 395                                         height2 >>= 1;
 396                         }
 397                         size++; // count the last 1x1 mipmap
 398                 }
 399                 else
 400                         size = width2*height2;
 401         }
 402         size *= glt->textype->internalbytesperpixel;
 403
 404         return size;
 405 }
 406
 407 void R_TextureStats_PrintTotal(void)
 408 {
 409         int glsize, inputsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 410         gltexture_t *glt;
 411         gltexturepool_t *pool;
 412         for (pool = gltexturepoolchain;pool;pool = pool->next)
 413         {
 414                 for (glt = pool->gltchain;glt;glt = glt->chain)
 415                 {
 416                         glsize = R_CalcTexelDataSize(glt);
 417                         inputsize = glt->width * glt->height * glt->textype->inputbytesperpixel;
 418
 419                         total++;
 420                         totalt += glsize;
 421                         totalp += inputsize;
 422                         if (!(glt->flags & GLTEXF_UPLOAD))
 423                         {
 424                                 loaded++;
 425                                 loadedt += glsize;
 426                                 loadedp += inputsize;
 427                         }
 428                 }
 429         }
 430         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);
 431 }
 432
 433 static void R_TextureStats_f(void)
 434 {
 435         int loaded;
 436         gltexture_t *glt;
 437         gltexturepool_t *pool;
 438         Con_Printf("glsize input crc  loaded mip alpha name\n");
 439         for (pool = gltexturepoolchain;pool;pool = pool->next)
 440         {
 441                 for (glt = pool->gltchain;glt;glt = glt->chain)
 442                 {
 443                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 444                         if (glt->flags & GLTEXF_PROCEDURAL)
 445                                 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>");
 446                         else
 447                                 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>");
 448                 }
 449                 Con_Printf("pool %10p\n", pool);
 450         }
 451         R_TextureStats_PrintTotal();
 452 }
 453
 454 char engineversion[40];
 455
 456 static void r_textures_start(void)
 457 {
 458         // deal with size limits of various drivers (3dfx in particular)
 459         glGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 460         CHECKGLERROR
 461
 462         // use the largest scrap texture size we can (not sure if this is really a good idea)
 463         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
 464
 465         texturemempool = Mem_AllocPool("Texture Info");
 466         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
 467         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
 468         gltexnuminuse = Mem_Alloc(texturemempool, MAX_GLTEXTURES);
 469         //memset(gltexnuminuse, 0, MAX_GLTEXTURES);
 470 }
 471
 472 static void r_textures_shutdown(void)
 473 {
 474         rtexturepool_t *temp;
 475         while(gltexturepoolchain)
 476         {
 477                 temp = (rtexturepool_t *) gltexturepoolchain;
 478                 R_FreeTexturePool(&temp);
 479         }
 480
 481         /*
 482         if (resizebuffer) Mem_Free(resizebuffer);resizebuffer = NULL;
 483         if (colorconvertbuffer) Mem_Free(colorconvertbuffer);colorconvertbuffer = NULL;
 484         if (resamplerow1) Mem_Free(resamplerow1);resamplerow1 = NULL;
 485         if (resamplerow2) Mem_Free(resamplerow2);resamplerow2 = NULL;
 486         if (texturebuffer) Mem_Free(texturebuffer);texturebuffer = NULL;
 487         if (gltexnuminuse) Mem_Free(gltexnuminuse);gltexnuminuse = NULL;
 488         */
 489         resizebuffersize = 0;
 490         resamplerowsize = 0;
 491         texturebuffersize = 0;
 492         resizebuffer = NULL;
 493         colorconvertbuffer = NULL;
 494         resamplerow1 = NULL;
 495         resamplerow2 = NULL;
 496         texturebuffer = NULL;
 497         gltexnuminuse = NULL;
 498         Mem_FreePool(&texturemempool);
 499         Mem_FreePool(&texturedatamempool);
 500         Mem_FreePool(&textureprocessingmempool);
 501 }
 502
 503 static void r_textures_newmap(void)
 504 {
 505 }
 506
 507 void R_Textures_Init (void)
 508 {
 509         Cmd_AddCommand ("gl_texturemode", &GL_TextureMode_f);
 510         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 511         Cvar_RegisterVariable (&r_max_scrapsize);
 512         Cvar_RegisterVariable (&r_max_size);
 513         Cvar_RegisterVariable (&r_picmip);
 514         Cvar_RegisterVariable (&r_lerpimages);
 515         Cvar_RegisterVariable (&r_precachetextures);
 516         gltexnuminuse = NULL;
 517
 518         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 519 }
 520
 521 static void R_ResampleTextureLerpLine (byte *in, byte *out, int inwidth, int outwidth, int bytesperpixel)
 522 {
 523         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 524         fstep = (int) (inwidth*65536.0f/outwidth);
 525         endx = (inwidth-1);
 526         if (bytesperpixel == 4)
 527         {
 528                 for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 529                 {
 530                         xi = f >> 16;
 531                         if (xi != oldx)
 532                         {
 533                                 in += (xi - oldx) * 4;
 534                                 oldx = xi;
 535                         }
 536                         if (xi < endx)
 537                         {
 538                                 lerp = f & 0xFFFF;
 539                                 *out++ = (byte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 540                                 *out++ = (byte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 541                                 *out++ = (byte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 542                                 *out++ = (byte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 543                         }
 544                         else // last pixel of the line has no pixel to lerp to
 545                         {
 546                                 *out++ = in[0];
 547                                 *out++ = in[1];
 548                                 *out++ = in[2];
 549                                 *out++ = in[3];
 550                         }
 551                 }
 552         }
 553         else if (bytesperpixel == 3)
 554         {
 555                 for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 556                 {
 557                         xi = f >> 16;
 558                         if (xi != oldx)
 559                         {
 560                                 in += (xi - oldx) * 3;
 561                                 oldx = xi;
 562                         }
 563                         if (xi < endx)
 564                         {
 565                                 lerp = f & 0xFFFF;
 566                                 *out++ = (byte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 567                                 *out++ = (byte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 568                                 *out++ = (byte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 569                         }
 570                         else // last pixel of the line has no pixel to lerp to
 571                         {
 572                                 *out++ = in[0];
 573                                 *out++ = in[1];
 574                                 *out++ = in[2];
 575                         }
 576                 }
 577         }
 578         else
 579                 Sys_Error("R_ResampleTextureLerpLine: unsupported bytesperpixel %i\n", bytesperpixel);
 580 }
 581
 582 /*
 583 ================
 584 R_ResampleTexture
 585 ================
 586 */
 587 static void R_ResampleTexture (void *indata, int inwidth, int inheight, void *outdata,  int outwidth, int outheight, int bytesperpixel)
 588 {
 589         if (resamplerowsize < outwidth*4)
 590         {
 591                 if (resamplerow1)
 592                         Mem_Free(resamplerow1);
 593                 if (resamplerow2)
 594                         Mem_Free(resamplerow2);
 595                 resamplerowsize = outwidth*4;
 596                 resamplerow1 = Mem_Alloc(textureprocessingmempool, resamplerowsize);
 597                 resamplerow2 = Mem_Alloc(textureprocessingmempool, resamplerowsize);
 598         }
 599 #define row1 resamplerow1
 600 #define row2 resamplerow2
 601         if (bytesperpixel == 4)
 602         {
 603                 if (r_lerpimages.integer)
 604                 {
 605                         int             i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
 606                         byte    *inrow, *out;
 607                         out = outdata;
 608                         fstep = (int) (inheight*65536.0f/outheight);
 609
 610                         inrow = indata;
 611                         oldy = 0;
 612                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 613                         R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
 614                         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 615                         {
 616                                 yi = f >> 16;
 617                                 if (yi < endy)
 618                                 {
 619                                         lerp = f & 0xFFFF;
 620                                         if (yi != oldy)
 621                                         {
 622                                                 inrow = (byte *)indata + inwidth4*yi;
 623                                                 if (yi == oldy+1)
 624                                                         memcpy(row1, row2, outwidth4);
 625                                                 else
 626                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 627                                                 R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
 628                                                 oldy = yi;
 629                                         }
 630                                         j = outwidth - 4;
 631                                         while(j >= 0)
 632                                         {
 633 #define LERPBYTE(i) out[i] = (byte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
 634                                                 LERPBYTE( 0);
 635                                                 LERPBYTE( 1);
 636                                                 LERPBYTE( 2);
 637                                                 LERPBYTE( 3);
 638                                                 LERPBYTE( 4);
 639                                                 LERPBYTE( 5);
 640                                                 LERPBYTE( 6);
 641                                                 LERPBYTE( 7);
 642                                                 LERPBYTE( 8);
 643                                                 LERPBYTE( 9);
 644                                                 LERPBYTE(10);
 645                                                 LERPBYTE(11);
 646                                                 LERPBYTE(12);
 647                                                 LERPBYTE(13);
 648                                                 LERPBYTE(14);
 649                                                 LERPBYTE(15);
 650                                                 out += 16;
 651                                                 row1 += 16;
 652                                                 row2 += 16;
 653                                                 j -= 4;
 654                                         }
 655                                         if (j & 2)
 656                                         {
 657                                                 LERPBYTE( 0);
 658                                                 LERPBYTE( 1);
 659                                                 LERPBYTE( 2);
 660                                                 LERPBYTE( 3);
 661                                                 LERPBYTE( 4);
 662                                                 LERPBYTE( 5);
 663                                                 LERPBYTE( 6);
 664                                                 LERPBYTE( 7);
 665                                                 out += 8;
 666                                                 row1 += 8;
 667                                                 row2 += 8;
 668                                         }
 669                                         if (j & 1)
 670                                         {
 671                                                 LERPBYTE( 0);
 672                                                 LERPBYTE( 1);
 673                                                 LERPBYTE( 2);
 674                                                 LERPBYTE( 3);
 675                                                 out += 4;
 676                                                 row1 += 4;
 677                                                 row2 += 4;
 678                                         }
 679                                         row1 -= outwidth4;
 680                                         row2 -= outwidth4;
 681                                 }
 682                                 else
 683                                 {
 684                                         if (yi != oldy)
 685                                         {
 686                                                 inrow = (byte *)indata + inwidth4*yi;
 687                                                 if (yi == oldy+1)
 688                                                         memcpy(row1, row2, outwidth4);
 689                                                 else
 690                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 691                                                 oldy = yi;
 692                                         }
 693                                         memcpy(out, row1, outwidth4);
 694                                 }
 695                         }
 696                 }
 697                 else
 698                 {
 699                         int i, j;
 700                         unsigned frac, fracstep;
 701                         // relies on int being 4 bytes
 702                         int *inrow, *out;
 703                         out = outdata;
 704
 705                         fracstep = inwidth*0x10000/outwidth;
 706                         for (i = 0;i < outheight;i++)
 707                         {
 708                                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
 709                                 frac = fracstep >> 1;
 710                                 j = outwidth - 4;
 711                                 while (j >= 0)
 712                                 {
 713                                         out[0] = inrow[frac >> 16];frac += fracstep;
 714                                         out[1] = inrow[frac >> 16];frac += fracstep;
 715                                         out[2] = inrow[frac >> 16];frac += fracstep;
 716                                         out[3] = inrow[frac >> 16];frac += fracstep;
 717                                         out += 4;
 718                                         j -= 4;
 719                                 }
 720                                 if (j & 2)
 721                                 {
 722                                         out[0] = inrow[frac >> 16];frac += fracstep;
 723                                         out[1] = inrow[frac >> 16];frac += fracstep;
 724                                         out += 2;
 725                                 }
 726                                 if (j & 1)
 727                                 {
 728                                         out[0] = inrow[frac >> 16];frac += fracstep;
 729                                         out += 1;
 730                                 }
 731                         }
 732                 }
 733         }
 734         else if (bytesperpixel == 3)
 735         {
 736                 if (r_lerpimages.integer)
 737                 {
 738                         int             i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
 739                         byte    *inrow, *out;
 740                         out = outdata;
 741                         fstep = (int) (inheight*65536.0f/outheight);
 742
 743                         inrow = indata;
 744                         oldy = 0;
 745                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 746                         R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
 747                         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 748                         {
 749                                 yi = f >> 16;
 750                                 if (yi < endy)
 751                                 {
 752                                         lerp = f & 0xFFFF;
 753                                         if (yi != oldy)
 754                                         {
 755                                                 inrow = (byte *)indata + inwidth3*yi;
 756                                                 if (yi == oldy+1)
 757                                                         memcpy(row1, row2, outwidth3);
 758                                                 else
 759                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 760                                                 R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
 761                                                 oldy = yi;
 762                                         }
 763                                         j = outwidth - 4;
 764                                         while(j >= 0)
 765                                         {
 766 #define LERPBYTE(i) out[i] = (byte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
 767                                                 LERPBYTE( 0);
 768                                                 LERPBYTE( 1);
 769                                                 LERPBYTE( 2);
 770                                                 LERPBYTE( 3);
 771                                                 LERPBYTE( 4);
 772                                                 LERPBYTE( 5);
 773                                                 LERPBYTE( 6);
 774                                                 LERPBYTE( 7);
 775                                                 LERPBYTE( 8);
 776                                                 LERPBYTE( 9);
 777                                                 LERPBYTE(10);
 778                                                 LERPBYTE(11);
 779                                                 out += 12;
 780                                                 row1 += 12;
 781                                                 row2 += 12;
 782                                                 j -= 4;
 783                                         }
 784                                         if (j & 2)
 785                                         {
 786                                                 LERPBYTE( 0);
 787                                                 LERPBYTE( 1);
 788                                                 LERPBYTE( 2);
 789                                                 LERPBYTE( 3);
 790                                                 LERPBYTE( 4);
 791                                                 LERPBYTE( 5);
 792                                                 out += 6;
 793                                                 row1 += 6;
 794                                                 row2 += 6;
 795                                         }
 796                                         if (j & 1)
 797                                         {
 798                                                 LERPBYTE( 0);
 799                                                 LERPBYTE( 1);
 800                                                 LERPBYTE( 2);
 801                                                 out += 3;
 802                                                 row1 += 3;
 803                                                 row2 += 3;
 804                                         }
 805                                         row1 -= outwidth3;
 806                                         row2 -= outwidth3;
 807                                 }
 808                                 else
 809                                 {
 810                                         if (yi != oldy)
 811                                         {
 812                                                 inrow = (byte *)indata + inwidth3*yi;
 813                                                 if (yi == oldy+1)
 814                                                         memcpy(row1, row2, outwidth3);
 815                                                 else
 816                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 817                                                 oldy = yi;
 818                                         }
 819                                         memcpy(out, row1, outwidth3);
 820                                 }
 821                         }
 822                 }
 823                 else
 824                 {
 825                         int i, j, f, inwidth3 = inwidth * 3;
 826                         unsigned frac, fracstep;
 827                         byte *inrow, *out;
 828                         out = outdata;
 829
 830                         fracstep = inwidth*0x10000/outwidth;
 831                         for (i = 0;i < outheight;i++)
 832                         {
 833                                 inrow = (byte *)indata + inwidth3*(i*inheight/outheight);
 834                                 frac = fracstep >> 1;
 835                                 j = outwidth - 4;
 836                                 while (j >= 0)
 837                                 {
 838                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 839                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 840                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 841                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 842                                         j -= 4;
 843                                 }
 844                                 if (j & 2)
 845                                 {
 846                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 847                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 848                                         out += 2;
 849                                 }
 850                                 if (j & 1)
 851                                 {
 852                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 853                                         out += 1;
 854                                 }
 855                         }
 856                 }
 857         }
 858         else
 859                 Sys_Error("R_ResampleTexture: unsupported bytesperpixel %i\n", bytesperpixel);
 860 #undef row1
 861 #undef row2
 862 }
 863
 864 // in can be the same as out
 865 static void R_MipReduce(byte *in, byte *out, int *width, int *height, int destwidth, int destheight, int bytesperpixel)
 866 {
 867         int x, y, nextrow;
 868         nextrow = *width * bytesperpixel;
 869         if (*width > destwidth)
 870         {
 871                 *width >>= 1;
 872                 if (*height > destheight)
 873                 {
 874                         // reduce both
 875                         *height >>= 1;
 876                         if (bytesperpixel == 4)
 877                         {
 878                                 for (y = 0;y < *height;y++)
 879                                 {
 880                                         for (x = 0;x < *width;x++)
 881                                         {
 882                                                 out[0] = (byte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
 883                                                 out[1] = (byte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
 884                                                 out[2] = (byte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
 885                                                 out[3] = (byte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
 886                                                 out += 4;
 887                                                 in += 8;
 888                                         }
 889                                         in += nextrow; // skip a line
 890                                 }
 891                         }
 892                         else if (bytesperpixel == 3)
 893                         {
 894                                 for (y = 0;y < *height;y++)
 895                                 {
 896                                         for (x = 0;x < *width;x++)
 897                                         {
 898                                                 out[0] = (byte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
 899                                                 out[1] = (byte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
 900                                                 out[2] = (byte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
 901                                                 out += 3;
 902                                                 in += 6;
 903                                         }
 904                                         in += nextrow; // skip a line
 905                                 }
 906                         }
 907                         else
 908                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 909                 }
 910                 else
 911                 {
 912                         // reduce width
 913                         if (bytesperpixel == 4)
 914                         {
 915                                 for (y = 0;y < *height;y++)
 916                                 {
 917                                         for (x = 0;x < *width;x++)
 918                                         {
 919                                                 out[0] = (byte) ((in[0] + in[4]) >> 1);
 920                                                 out[1] = (byte) ((in[1] + in[5]) >> 1);
 921                                                 out[2] = (byte) ((in[2] + in[6]) >> 1);
 922                                                 out[3] = (byte) ((in[3] + in[7]) >> 1);
 923                                                 out += 4;
 924                                                 in += 8;
 925                                         }
 926                                 }
 927                         }
 928                         else if (bytesperpixel == 3)
 929                         {
 930                                 for (y = 0;y < *height;y++)
 931                                 {
 932                                         for (x = 0;x < *width;x++)
 933                                         {
 934                                                 out[0] = (byte) ((in[0] + in[3]) >> 1);
 935                                                 out[1] = (byte) ((in[1] + in[4]) >> 1);
 936                                                 out[2] = (byte) ((in[2] + in[5]) >> 1);
 937                                                 out += 3;
 938                                                 in += 6;
 939                                         }
 940                                 }
 941                         }
 942                         else
 943                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 944                 }
 945         }
 946         else
 947         {
 948                 if (*height > destheight)
 949                 {
 950                         // reduce height
 951                         *height >>= 1;
 952                         if (bytesperpixel == 4)
 953                         {
 954                                 for (y = 0;y < *height;y++)
 955                                 {
 956                                         for (x = 0;x < *width;x++)
 957                                         {
 958                                                 out[0] = (byte) ((in[0] + in[nextrow  ]) >> 1);
 959                                                 out[1] = (byte) ((in[1] + in[nextrow+1]) >> 1);
 960                                                 out[2] = (byte) ((in[2] + in[nextrow+2]) >> 1);
 961                                                 out[3] = (byte) ((in[3] + in[nextrow+3]) >> 1);
 962                                                 out += 4;
 963                                                 in += 4;
 964                                         }
 965                                         in += nextrow; // skip a line
 966                                 }
 967                         }
 968                         else if (bytesperpixel == 3)
 969                         {
 970                                 for (y = 0;y < *height;y++)
 971                                 {
 972                                         for (x = 0;x < *width;x++)
 973                                         {
 974                                                 out[0] = (byte) ((in[0] + in[nextrow  ]) >> 1);
 975                                                 out[1] = (byte) ((in[1] + in[nextrow+1]) >> 1);
 976                                                 out[2] = (byte) ((in[2] + in[nextrow+2]) >> 1);
 977                                                 out += 3;
 978                                                 in += 3;
 979                                         }
 980                                         in += nextrow; // skip a line
 981                                 }
 982                         }
 983                         else
 984                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 985                 }
 986                 else
 987                         Sys_Error("R_MipReduce: desired size already achieved\n");
 988         }
 989 }
 990
 991 static void R_Upload(gltexture_t *glt, byte *data)
 992 {
 993         int mip, width, height, internalformat;
 994         byte *prevbuffer;
 995         prevbuffer = data;
 996
 997         glBindTexture(GL_TEXTURE_2D, glt->image->texnum);
 998         CHECKGLERROR
 999
1000         glt->flags &= ~GLTEXF_UPLOAD;
1001
1002         if (glt->flags & TEXF_FRAGMENT)
1003         {
1004                 if (resizebuffersize < glt->image->width * glt->image->height * glt->image->bytesperpixel)
1005                 {
1006                         resizebuffersize = glt->image->width * glt->image->height * glt->image->bytesperpixel;
1007                         if (resizebuffer)
1008                                 Mem_Free(resizebuffer);
1009                         if (colorconvertbuffer)
1010                                 Mem_Free(colorconvertbuffer);
1011                         resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1012                         colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1013                         if (!resizebuffer || !colorconvertbuffer)
1014                                 Host_Error("R_Upload: out of memory\n");
1015                 }
1016
1017                 if (glt->image->flags & GLTEXF_UPLOAD)
1018                 {
1019                         Con_DPrintf("uploaded new fragments image\n");
1020                         glt->image->flags &= ~GLTEXF_UPLOAD;
1021                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->bytesperpixel);
1022                         glTexImage2D (GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
1023                         CHECKGLERROR
1024                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
1025                         CHECKGLERROR
1026                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1027                         CHECKGLERROR
1028                 }
1029
1030                 if (prevbuffer == NULL)
1031                 {
1032                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->bytesperpixel);
1033                         prevbuffer = resizebuffer;
1034                 }
1035                 else if (glt->textype->textype == TEXTYPE_QPALETTE)
1036                 {
1037                         // promote paletted to RGBA, so we only have to worry about RGB and
1038                         // RGBA in the rest of this code
1039                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
1040                         prevbuffer = colorconvertbuffer;
1041                 }
1042
1043                 glTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1044                 CHECKGLERROR
1045                 return;
1046         }
1047
1048         glt->image->flags &= ~GLTEXF_UPLOAD;
1049
1050         // these are rounded up versions of the size to do better resampling
1051         for (width = 1;width < glt->width;width <<= 1);
1052         for (height = 1;height < glt->height;height <<= 1);
1053
1054         if (resizebuffersize < width * height * glt->image->bytesperpixel)
1055         {
1056                 resizebuffersize = width * height * glt->image->bytesperpixel;
1057                 if (resizebuffer)
1058                         Mem_Free(resizebuffer);
1059                 if (colorconvertbuffer)
1060                         Mem_Free(colorconvertbuffer);
1061                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1062                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1063                 if (!resizebuffer || !colorconvertbuffer)
1064                         Host_Error("R_Upload: out of memory\n");
1065         }
1066
1067         if (prevbuffer == NULL)
1068         {
1069                 width = glt->image->width;
1070                 height = glt->image->height;
1071                 memset(resizebuffer, 255, width * height * glt->image->bytesperpixel);
1072                 prevbuffer = resizebuffer;
1073         }
1074         else
1075         {
1076                 if (glt->textype->textype == TEXTYPE_QPALETTE)
1077                 {
1078                         // promote paletted to RGBA, so we only have to worry about RGB and
1079                         // RGBA in the rest of this code
1080                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
1081                         prevbuffer = colorconvertbuffer;
1082                 }
1083
1084                 if (glt->width != width || glt->height != height)
1085                 {
1086                         R_ResampleTexture(prevbuffer, glt->width, glt->height, resizebuffer, width, height, glt->image->bytesperpixel);
1087                         prevbuffer = resizebuffer;
1088                 }
1089
1090                 // apply picmip/max_size limitations
1091                 while (width > glt->image->width || height > glt->image->height)
1092                 {
1093                         R_MipReduce(prevbuffer, resizebuffer, &width, &height, glt->image->width, glt->image->height, glt->image->bytesperpixel);
1094                         prevbuffer = resizebuffer;
1095                 }
1096         }
1097
1098         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
1099         internalformat = 3;
1100         if (glt->flags & TEXF_ALPHA)
1101                 internalformat = 4;
1102
1103         mip = 0;
1104         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1105         CHECKGLERROR
1106         if (glt->flags & TEXF_MIPMAP)
1107         {
1108                 while (width > 1 || height > 1)
1109                 {
1110                         R_MipReduce(prevbuffer, resizebuffer, &width, &height, 1, 1, glt->image->bytesperpixel);
1111                         prevbuffer = resizebuffer;
1112
1113                         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1114                         CHECKGLERROR
1115                 }
1116
1117                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
1118                 CHECKGLERROR
1119                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1120                 CHECKGLERROR
1121         }
1122         else
1123         {
1124                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
1125                 CHECKGLERROR
1126                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1127                 CHECKGLERROR
1128         }
1129 }
1130
1131 static void R_FindImageForTexture(gltexture_t *glt)
1132 {
1133         int i, j, best, best2, x, y, w, h;
1134         textypeinfo_t *texinfo;
1135         gltexturepool_t *pool;
1136         gltextureimage_t *image, **imagechainpointer;
1137         texinfo = glt->textype;
1138         pool = glt->pool;
1139
1140         x = 0;
1141         y = 0;
1142         w = glt->width;
1143         h = glt->height;
1144         if (glt->flags & TEXF_FRAGMENT)
1145         {
1146                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
1147                 {
1148                         image = *imagechainpointer;
1149                         if (image->type != GLIMAGETYPE_FRAGMENTS)
1150                                 continue;
1151                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
1152                                 continue;
1153
1154                         // got a fragments texture, find a place in it if we can
1155                         best = block_size;
1156                         for (best = block_size, i = 0;i < block_size - w;i += texinfo->align)
1157                         {
1158                                 for (best2 = 0, j = 0;j < w;j++)
1159                                 {
1160                                         if (image->blockallocation[i+j] >= best)
1161                                                 break;
1162                                         if (best2 < image->blockallocation[i+j])
1163                                                 best2 = image->blockallocation[i+j];
1164                                 }
1165                                 if (j == w)
1166                                 {
1167                                         // this is a valid spot
1168                                         x = i;
1169                                         y = best = best2;
1170                                 }
1171                         }
1172
1173                         if (best + h > block_size)
1174                                 continue;
1175
1176                         for (i = 0;i < w;i++)
1177                                 image->blockallocation[x + i] = best + h;
1178
1179                         glt->x = x;
1180                         glt->y = y;
1181                         glt->image = image;
1182                         image->texturecount++;
1183                         return;
1184                 }
1185
1186                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
1187                 if (image == NULL)
1188                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
1189                 //memset(image, 0, sizeof(*image));
1190                 image->type = GLIMAGETYPE_FRAGMENTS;
1191                 image->width = block_size;
1192                 image->height = block_size;
1193                 image->blockallocation = Mem_Alloc(texturemempool, block_size * sizeof(short));
1194                 memset(image->blockallocation, 0, block_size * sizeof(short));
1195
1196                 x = 0;
1197                 y = 0;
1198                 for (i = 0;i < w;i++)
1199                         image->blockallocation[x + i] = y + h;
1200         }
1201         else
1202         {
1203                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
1204
1205                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
1206                 if (image == NULL)
1207                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
1208                 //memset(image, 0, sizeof(*image));
1209                 image->type = GLIMAGETYPE_TILE;
1210                 image->blockallocation = NULL;
1211
1212                 // calculate final size
1213                 if (r_max_size.integer > realmaxsize)
1214                         Cvar_SetValue("r_max_size", realmaxsize);
1215                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
1216                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
1217                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
1218                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
1219                 if (image->width < 1) image->width = 1;
1220                 if (image->height < 1) image->height = 1;
1221         }
1222         image->glinternalformat = texinfo->glinternalformat;
1223         image->glformat = texinfo->glformat;
1224         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA)) | GLTEXF_UPLOAD;
1225         image->bytesperpixel = texinfo->internalbytesperpixel;
1226         for (i = 1;i < MAX_GLTEXTURES;i++)
1227                 if (!gltexnuminuse[i])
1228                         break;
1229         if (i < MAX_GLTEXTURES)
1230                 gltexnuminuse[image->texnum = i] = true;
1231         else
1232                 Sys_Error("R_FindImageForTexture: ran out of GL textures\n");
1233         *imagechainpointer = image;
1234         image->texturecount++;
1235
1236         glt->x = x;
1237         glt->y = y;
1238         glt->image = image;
1239 }
1240
1241 // note: R_FindImageForTexture must be called before this
1242 static void R_UploadTexture (gltexture_t *glt)
1243 {
1244         if (!(glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL)))
1245                 return;
1246
1247         if (glt->flags & GLTEXF_PROCEDURAL)
1248         {
1249                 if (glt->generate)
1250                 {
1251                         if (texturebuffersize < glt->width * glt->height * glt->textype->inputbytesperpixel)
1252                         {
1253                                 if (texturebuffer)
1254                                         Mem_Free(texturebuffer);
1255                                 texturebuffersize = glt->width * glt->height * glt->textype->inputbytesperpixel;
1256                                 texturebuffer = Mem_Alloc(textureprocessingmempool, texturebuffersize);
1257                         }
1258
1259                         glt->generate(texturebuffer, glt->width, glt->height, (void *)glt->proceduraldata, glt->proceduraldatasize);
1260                 }
1261         }
1262         else
1263         {
1264                 R_Upload(glt, glt->inputtexels);
1265                 if (glt->inputtexels)
1266                 {
1267                         Mem_Free(glt->inputtexels);
1268                         glt->inputtexels = NULL;
1269                         glt->flags |= GLTEXF_DESTROYED;
1270                 }
1271                 else if (glt->flags & GLTEXF_DESTROYED)
1272                         Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
1273         }
1274 }
1275
1276 static gltexture_t *R_SetupTexture(gltexturepool_t *pool, char *identifier, int crc, int width, int height, int flags, textypeinfo_t *texinfo, byte *data, int (*generate)(byte *buffer, int width, int height, void *proceduraldata, int proceduraldatasize), void *proceduraldata, int proceduraldatasize)
1277 {
1278         gltexture_t *glt;
1279         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1280         //memset(glt, 0, sizeof(gltexture_t));
1281         if (identifier)
1282         {
1283                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1284                 strcpy (glt->identifier, identifier);
1285         }
1286         else
1287                 glt->identifier = NULL;
1288         glt->pool = pool;
1289         glt->chain = pool->gltchain;
1290         pool->gltchain = glt;
1291         glt->crc = crc;
1292         glt->width = width;
1293         glt->height = height;
1294         glt->flags = flags;
1295         glt->textype = texinfo;
1296
1297         if (data)
1298         {
1299                 glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * texinfo->inputbytesperpixel);
1300                 if (glt->inputtexels == NULL)
1301                         Sys_Error("R_SetupTexture: out of memory\n");
1302                 memcpy(glt->inputtexels, data, glt->width * glt->height * texinfo->inputbytesperpixel);
1303         }
1304         else
1305                 glt->inputtexels = NULL;
1306
1307         glt->generate = generate;
1308         glt->proceduraldatasize = proceduraldatasize;
1309         if (proceduraldatasize)
1310         {
1311                 glt->proceduraldata = Mem_Alloc(texturemempool, proceduraldatasize);
1312                 if (glt->proceduraldata == NULL)
1313                         Sys_Error("R_SetupTexture: out of memory\n");
1314         }
1315         else
1316                 glt->proceduraldata = NULL;
1317
1318         R_FindImageForTexture(glt);
1319         R_PrecacheTexture(glt);
1320
1321         return glt;
1322 }
1323
1324 /*
1325 ================
1326 R_LoadTexture
1327 ================
1328 */
1329 rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, byte *data, int textype, int flags)
1330 {
1331         int i;
1332         gltexture_t *glt;
1333         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1334         textypeinfo_t *texinfo;
1335         unsigned short crc;
1336
1337         if (cls.state == ca_dedicated)
1338                 return NULL;
1339
1340         texinfo = R_GetTexTypeInfo(textype, flags);
1341
1342         // data can be NULL
1343 //      if (data == NULL)
1344 //              Host_Error("R_LoadTexture: \"%s\" has no data\n", identifier);
1345
1346         if (flags & TEXF_FRAGMENT)
1347         {
1348                 if (width > block_size || height > block_size)
1349                         Host_Error("R_LoadTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
1350                 if ((width * texinfo->internalbytesperpixel) & 3)
1351                         Host_Error("R_LoadTexture: incompatible width for fragment");
1352         }
1353
1354         // clear the alpha flag if the texture has no transparent pixels
1355         switch(textype)
1356         {
1357         case TEXTYPE_QPALETTE:
1358                 if (flags & TEXF_ALPHA)
1359                 {
1360                         flags &= ~TEXF_ALPHA;
1361                         for (i = 0;i < width * height;i++)
1362                         {
1363                                 if (data[i] == 255)
1364                                 {
1365                                         flags |= TEXF_ALPHA;
1366                                         break;
1367                                 }
1368                         }
1369                 }
1370                 break;
1371         case TEXTYPE_RGB:
1372                 if (flags & TEXF_ALPHA)
1373                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
1374                 break;
1375         case TEXTYPE_RGBA:
1376                 if (flags & TEXF_ALPHA)
1377                 {
1378                         flags &= ~TEXF_ALPHA;
1379                         for (i = 0;i < width * height;i++)
1380                         {
1381                                 if (data[i * 4 + 3] < 255)
1382                                 {
1383                                         flags |= TEXF_ALPHA;
1384                                         break;
1385                                 }
1386                         }
1387                 }
1388                 break;
1389         default:
1390                 Host_Error("R_LoadTexture: unknown texture type\n");
1391         }
1392
1393         // LordHavoc: do a CRC to confirm the data really is the same as previous occurances.
1394         if (data == NULL)
1395                 crc = 0;
1396         else
1397                 crc = CRC_Block(data, width*height*texinfo->inputbytesperpixel);
1398
1399         // see if the texture is already present
1400         if (identifier && (glt = R_FindTexture(pool, identifier)))
1401         {
1402                 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)
1403                 {
1404                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
1405                         return (rtexture_t *)glt; // exact match, use existing
1406                 }
1407                 Con_Printf("R_LoadTexture: cache mismatch on %s, replacing old texture\n", identifier);
1408                 R_FreeTexture(glt);
1409         }
1410
1411         return (rtexture_t *)R_SetupTexture(pool, identifier, crc, width, height, flags | GLTEXF_UPLOAD, texinfo, data, NULL, NULL, 0);
1412 }
1413
1414 rtexture_t *R_ProceduralTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, int textype, int flags, int (*generate)(byte *buffer, int width, int height, void *proceduraldata, int proceduraldatasize), void *proceduraldata, int proceduraldatasize)
1415 {
1416         gltexture_t             *glt;
1417         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1418         textypeinfo_t   *texinfo;
1419
1420         if (cls.state == ca_dedicated)
1421                 return NULL;
1422
1423         texinfo = R_GetTexTypeInfo(textype, flags);
1424
1425         // no function is supported, for odd uses
1426 //      if (generate == NULL)
1427 //              Host_Error("R_ProceduralTexture: \"%s\" has no generate function\n", identifier);
1428         if (flags & TEXF_FRAGMENT)
1429         {
1430                 if (width > block_size || height > block_size)
1431                         Host_Error("R_ProceduralTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
1432                 if ((width * texinfo->internalbytesperpixel) & 3)
1433                         Host_Error("R_ProceduralTexture: incompatible width for fragment");
1434         }
1435
1436         // see if the texture is already present
1437         if (identifier && (glt = R_FindTexture(pool, identifier)))
1438         {
1439                 if (width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
1440                 {
1441                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
1442                         return (rtexture_t *)glt; // exact match, use existing
1443                 }
1444                 Con_DPrintf("R_LoadTexture: cache mismatch, replacing old texture\n");
1445                 R_FreeTexture(glt);
1446         }
1447
1448         return (rtexture_t *)R_SetupTexture(pool, identifier, 0, width, height, flags | GLTEXF_PROCEDURAL | GLTEXF_UPLOAD, texinfo, NULL, generate, proceduraldata, proceduraldatasize);
1449 }
1450
1451 int R_TextureHasAlpha(rtexture_t *rt)
1452 {
1453         gltexture_t *glt;
1454         if (!rt)
1455                 return false;
1456         glt = (gltexture_t *)rt;
1457         return (glt->flags & TEXF_ALPHA) != 0;
1458 }
1459
1460 int R_TextureWidth(rtexture_t *rt)
1461 {
1462         if (!rt)
1463                 return false;
1464         return ((gltexture_t *)rt)->width;
1465 }
1466
1467 int R_TextureHeight(rtexture_t *rt)
1468 {
1469         if (!rt)
1470                 return false;
1471         return ((gltexture_t *)rt)->height;
1472 }
1473
1474 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1475 {
1476         gltexture_t *glt;
1477         float iwidth, iheight;
1478         if (cls.state == ca_dedicated)
1479         {
1480                 if (x)
1481                         *x = 0;
1482                 if (y)
1483                         *y = 0;
1484                 if (fx1 || fy1 || fx2 || fy2)
1485                 {
1486                         if (fx1)
1487                                 *fx1 = 0;
1488                         if (fy1)
1489                                 *fy1 = 0;
1490                         if (fx2)
1491                                 *fx2 = 1;
1492                         if (fy2)
1493                                 *fy2 = 1;
1494                 }
1495                 return;
1496         }
1497         if (!rt)
1498                 Host_Error("R_FragmentLocation: no texture supplied\n");
1499         glt = (gltexture_t *)rt;
1500         if (glt->flags & TEXF_FRAGMENT)
1501         {
1502                 if (x)
1503                         *x = glt->x;
1504                 if (y)
1505                         *y = glt->y;
1506                 if (fx1 || fy1 || fx2 || fy2)
1507                 {
1508                         iwidth = 1.0f / glt->image->width;
1509                         iheight = 1.0f / glt->image->height;
1510                         if (fx1)
1511                                 *fx1 = glt->x * iwidth;
1512                         if (fy1)
1513                                 *fy1 = glt->y * iheight;
1514                         if (fx2)
1515                                 *fx2 = (glt->x + glt->width) * iwidth;
1516                         if (fy2)
1517                                 *fy2 = (glt->y + glt->height) * iheight;
1518                 }
1519         }
1520         else
1521         {
1522                 if (x)
1523                         *x = 0;
1524                 if (y)
1525                         *y = 0;
1526                 if (fx1 || fy1 || fx2 || fy2)
1527                 {
1528                         if (fx1)
1529                                 *fx1 = 0;
1530                         if (fy1)
1531                                 *fy1 = 0;
1532                         if (fx2)
1533                                 *fx2 = 1;
1534                         if (fy2)
1535                                 *fy2 = 1;
1536                 }
1537         }
1538 }
1539
1540 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1541 {
1542         textypeinfo_t *texinfo = R_GetTexTypeInfo(textype, flags);
1543         while ((width * texinfo->internalbytesperpixel) & 3)
1544                 width++;
1545         return width;
1546 }
1547
1548 void R_UpdateTexture(rtexture_t *rt, byte *data)
1549 {
1550         gltexture_t *glt;
1551         if (rt == NULL)
1552                 Host_Error("R_UpdateTexture: no texture supplied\n");
1553         if (data == NULL)
1554                 Host_Error("R_UpdateTexture: no data supplied\n");
1555         glt = (gltexture_t *)rt;
1556         /*
1557         if (!(glt->flags & GLTEXF_PROCEDURAL))
1558         {
1559                 if (glt->inputtexels == NULL)
1560                 {
1561                         glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * glt->textype->inputbytesperpixel);
1562                         if (glt->inputtexels == NULL)
1563                                 Host_Error("R_UpdateTexture: ran out of memory\n");
1564                 }
1565                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1566         }
1567         R_Upload(glt, data);
1568         */
1569         // if it has not been uploaded yet, update the data that will be used when it is
1570         if (glt->inputtexels)
1571                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1572         else
1573                 R_Upload(glt, data);
1574 }
1575