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 *resamplerow1 = NULL, *resamplerow2 = NULL;
 122 static int resamplerowsize = 0;
 123 static qbyte *resizebuffer = NULL, *colorconvertbuffer;
 124 static int resizebuffersize = 0;
 125 static qbyte *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         if (glt == NULL)
 212                 Host_Error("R_FreeTexture: texture == NULL\n");
 213
 214         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
 215         if (*gltpointer == glt)
 216                 *gltpointer = glt->chain;
 217         else
 218                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool\n", glt->identifier);
 219
 220         // note: if freeing a fragment texture, this will not make the claimed
 221         // space available for new textures unless all other fragments in the
 222         // image are also freed
 223         image = glt->image;
 224         image->texturecount--;
 225         if (image->texturecount < 1)
 226         {
 227                 for (gltimagepointer = &glt->pool->imagechain;*gltimagepointer && *gltimagepointer != image;gltimagepointer = &(*gltimagepointer)->imagechain);
 228                 if (*gltimagepointer == image)
 229                         *gltimagepointer = image->imagechain;
 230                 else
 231                         Host_Error("R_FreeTexture: image not linked in pool\n");
 232                 if (image->texnum)
 233                 {
 234                         texnum = image->texnum;
 235                         gltexnuminuse[image->texnum] = 0;
 236                         glDeleteTextures(1, &texnum);
 237                 }
 238                 if (image->blockallocation)
 239                         Mem_Free(image->blockallocation);
 240                 Mem_Free(image);
 241         }
 242
 243         if (glt->identifier)
 244                 Mem_Free(glt->identifier);
 245         if (glt->inputtexels)
 246                 Mem_Free(glt->inputtexels);
 247         if (glt->proceduraldata)
 248                 Mem_Free(glt->proceduraldata);
 249         Mem_Free(glt);
 250 }
 251
 252 static gltexture_t *R_FindTexture (gltexturepool_t *pool, char *identifier)
 253 {
 254         gltexture_t     *glt;
 255
 256         if (!identifier)
 257                 return NULL;
 258
 259         for (glt = pool->gltchain;glt;glt = glt->chain)
 260                 if (glt->identifier && !strcmp (identifier, glt->identifier))
 261                         return glt;
 262
 263         return NULL;
 264 }
 265
 266 rtexturepool_t *R_AllocTexturePool(void)
 267 {
 268         gltexturepool_t *pool;
 269         if (texturemempool == NULL)
 270                 return NULL;
 271         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 272         if (pool == NULL)
 273                 return NULL;
 274         //memset(pool, 0, sizeof(gltexturepool_t));
 275         pool->next = gltexturepoolchain;
 276         gltexturepoolchain = pool;
 277         pool->sentinel = TEXTUREPOOL_SENTINEL;
 278         return (rtexturepool_t *)pool;
 279 }
 280
 281 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 282 {
 283         gltexturepool_t *pool, **poolpointer;
 284         if (rtexturepool == NULL)
 285                 return;
 286         if (*rtexturepool == NULL)
 287                 return;
 288         pool = (gltexturepool_t *)(*rtexturepool);
 289         *rtexturepool = NULL;
 290         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 291                 Host_Error("R_FreeTexturePool: pool already freed\n");
 292         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 293         if (*poolpointer == pool)
 294                 *poolpointer = pool->next;
 295         else
 296                 Host_Error("R_FreeTexturePool: pool not linked\n");
 297         while (pool->gltchain)
 298                 R_FreeTexture(pool->gltchain);
 299         if (pool->imagechain)
 300                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 301         Mem_Free(pool);
 302 }
 303
 304
 305 typedef struct
 306 {
 307         char *name;
 308         int minification, magnification;
 309 }
 310 glmode_t;
 311
 312 static glmode_t modes[] =
 313 {
 314         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 315         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 316         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 317         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 318         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 319         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 320 };
 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 }
 373
 374 static int R_CalcTexelDataSize (gltexture_t *glt)
 375 {
 376         int width2, height2, size;
 377         if (glt->flags & TEXF_FRAGMENT)
 378                 size = glt->width * glt->height;
 379         else
 380         {
 381                 if (r_max_size.integer > realmaxsize)
 382                         Cvar_SetValue("r_max_size", realmaxsize);
 383                 // calculate final size
 384                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 385                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 386                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
 387                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
 388                 if (width2 < 1) width2 = 1;
 389                 if (height2 < 1) height2 = 1;
 390
 391                 size = 0;
 392                 if (glt->flags & TEXF_MIPMAP)
 393                 {
 394                         while (width2 > 1 || height2 > 1)
 395                         {
 396                                 size += width2 * height2;
 397                                 if (width2 > 1)
 398                                         width2 >>= 1;
 399                                 if (height2 > 1)
 400                                         height2 >>= 1;
 401                         }
 402                         size++; // count the last 1x1 mipmap
 403                 }
 404                 else
 405                         size = width2*height2;
 406         }
 407         size *= glt->textype->internalbytesperpixel;
 408
 409         return size;
 410 }
 411
 412 void R_TextureStats_PrintTotal(void)
 413 {
 414         int glsize, inputsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 415         gltexture_t *glt;
 416         gltexturepool_t *pool;
 417         for (pool = gltexturepoolchain;pool;pool = pool->next)
 418         {
 419                 for (glt = pool->gltchain;glt;glt = glt->chain)
 420                 {
 421                         glsize = R_CalcTexelDataSize(glt);
 422                         inputsize = glt->width * glt->height * glt->textype->inputbytesperpixel;
 423
 424                         total++;
 425                         totalt += glsize;
 426                         totalp += inputsize;
 427                         if (!(glt->flags & GLTEXF_UPLOAD))
 428                         {
 429                                 loaded++;
 430                                 loadedt += glsize;
 431                                 loadedp += inputsize;
 432                         }
 433                 }
 434         }
 435         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);
 436 }
 437
 438 static void R_TextureStats_f(void)
 439 {
 440         int loaded;
 441         gltexture_t *glt;
 442         gltexturepool_t *pool;
 443         Con_Printf("glsize input crc  loaded mip alpha name\n");
 444         for (pool = gltexturepoolchain;pool;pool = pool->next)
 445         {
 446                 for (glt = pool->gltchain;glt;glt = glt->chain)
 447                 {
 448                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 449                         if (glt->flags & GLTEXF_PROCEDURAL)
 450                                 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>");
 451                         else
 452                                 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>");
 453                 }
 454                 Con_Printf("pool %10p\n", pool);
 455         }
 456         R_TextureStats_PrintTotal();
 457 }
 458
 459 char engineversion[40];
 460
 461 static void r_textures_start(void)
 462 {
 463         // deal with size limits of various drivers (3dfx in particular)
 464         glGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 465         CHECKGLERROR
 466
 467         // use the largest scrap texture size we can (not sure if this is really a good idea)
 468         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
 469
 470         texturemempool = Mem_AllocPool("Texture Info");
 471         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
 472         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
 473         gltexnuminuse = Mem_Alloc(texturemempool, MAX_GLTEXTURES);
 474         //memset(gltexnuminuse, 0, MAX_GLTEXTURES);
 475 }
 476
 477 static void r_textures_shutdown(void)
 478 {
 479         rtexturepool_t *temp;
 480         while(gltexturepoolchain)
 481         {
 482                 temp = (rtexturepool_t *) gltexturepoolchain;
 483                 R_FreeTexturePool(&temp);
 484         }
 485
 486         /*
 487         if (resizebuffer) Mem_Free(resizebuffer);resizebuffer = NULL;
 488         if (colorconvertbuffer) Mem_Free(colorconvertbuffer);colorconvertbuffer = NULL;
 489         if (resamplerow1) Mem_Free(resamplerow1);resamplerow1 = NULL;
 490         if (resamplerow2) Mem_Free(resamplerow2);resamplerow2 = NULL;
 491         if (texturebuffer) Mem_Free(texturebuffer);texturebuffer = NULL;
 492         if (gltexnuminuse) Mem_Free(gltexnuminuse);gltexnuminuse = NULL;
 493         */
 494         resizebuffersize = 0;
 495         resamplerowsize = 0;
 496         texturebuffersize = 0;
 497         resizebuffer = NULL;
 498         colorconvertbuffer = NULL;
 499         resamplerow1 = NULL;
 500         resamplerow2 = NULL;
 501         texturebuffer = NULL;
 502         gltexnuminuse = NULL;
 503         Mem_FreePool(&texturemempool);
 504         Mem_FreePool(&texturedatamempool);
 505         Mem_FreePool(&textureprocessingmempool);
 506 }
 507
 508 static void r_textures_newmap(void)
 509 {
 510 }
 511
 512 void R_Textures_Init (void)
 513 {
 514         Cmd_AddCommand ("gl_texturemode", &GL_TextureMode_f);
 515         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 516         Cvar_RegisterVariable (&r_max_scrapsize);
 517         Cvar_RegisterVariable (&r_max_size);
 518         Cvar_RegisterVariable (&r_picmip);
 519         Cvar_RegisterVariable (&r_lerpimages);
 520         Cvar_RegisterVariable (&r_precachetextures);
 521         gltexnuminuse = NULL;
 522
 523         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 524 }
 525
 526 static void R_ResampleTextureLerpLine (qbyte *in, qbyte *out, int inwidth, int outwidth, int bytesperpixel)
 527 {
 528         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 529         fstep = (int) (inwidth*65536.0f/outwidth);
 530         endx = (inwidth-1);
 531         if (bytesperpixel == 4)
 532         {
 533                 for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 534                 {
 535                         xi = f >> 16;
 536                         if (xi != oldx)
 537                         {
 538                                 in += (xi - oldx) * 4;
 539                                 oldx = xi;
 540                         }
 541                         if (xi < endx)
 542                         {
 543                                 lerp = f & 0xFFFF;
 544                                 *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 545                                 *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 546                                 *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 547                                 *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 548                         }
 549                         else // last pixel of the line has no pixel to lerp to
 550                         {
 551                                 *out++ = in[0];
 552                                 *out++ = in[1];
 553                                 *out++ = in[2];
 554                                 *out++ = in[3];
 555                         }
 556                 }
 557         }
 558         else if (bytesperpixel == 3)
 559         {
 560                 for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 561                 {
 562                         xi = f >> 16;
 563                         if (xi != oldx)
 564                         {
 565                                 in += (xi - oldx) * 3;
 566                                 oldx = xi;
 567                         }
 568                         if (xi < endx)
 569                         {
 570                                 lerp = f & 0xFFFF;
 571                                 *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 572                                 *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 573                                 *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 574                         }
 575                         else // last pixel of the line has no pixel to lerp to
 576                         {
 577                                 *out++ = in[0];
 578                                 *out++ = in[1];
 579                                 *out++ = in[2];
 580                         }
 581                 }
 582         }
 583         else
 584                 Sys_Error("R_ResampleTextureLerpLine: unsupported bytesperpixel %i\n", bytesperpixel);
 585 }
 586
 587 /*
 588 ================
 589 R_ResampleTexture
 590 ================
 591 */
 592 static void R_ResampleTexture (void *indata, int inwidth, int inheight, void *outdata,  int outwidth, int outheight, int bytesperpixel)
 593 {
 594         if (resamplerowsize < outwidth*4)
 595         {
 596                 if (resamplerow1)
 597                         Mem_Free(resamplerow1);
 598                 if (resamplerow2)
 599                         Mem_Free(resamplerow2);
 600                 resamplerowsize = outwidth*4;
 601                 resamplerow1 = Mem_Alloc(textureprocessingmempool, resamplerowsize);
 602                 resamplerow2 = Mem_Alloc(textureprocessingmempool, resamplerowsize);
 603         }
 604 #define row1 resamplerow1
 605 #define row2 resamplerow2
 606         if (bytesperpixel == 4)
 607         {
 608                 if (r_lerpimages.integer)
 609                 {
 610                         int i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
 611                         qbyte *inrow, *out;
 612                         out = outdata;
 613                         fstep = (int) (inheight*65536.0f/outheight);
 614
 615                         inrow = indata;
 616                         oldy = 0;
 617                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 618                         R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
 619                         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 620                         {
 621                                 yi = f >> 16;
 622                                 if (yi < endy)
 623                                 {
 624                                         lerp = f & 0xFFFF;
 625                                         if (yi != oldy)
 626                                         {
 627                                                 inrow = (qbyte *)indata + inwidth4*yi;
 628                                                 if (yi == oldy+1)
 629                                                         memcpy(row1, row2, outwidth4);
 630                                                 else
 631                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 632                                                 R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
 633                                                 oldy = yi;
 634                                         }
 635                                         j = outwidth - 4;
 636                                         while(j >= 0)
 637                                         {
 638 #define LERPBYTE(i) out[i] = (qbyte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
 639                                                 LERPBYTE( 0);
 640                                                 LERPBYTE( 1);
 641                                                 LERPBYTE( 2);
 642                                                 LERPBYTE( 3);
 643                                                 LERPBYTE( 4);
 644                                                 LERPBYTE( 5);
 645                                                 LERPBYTE( 6);
 646                                                 LERPBYTE( 7);
 647                                                 LERPBYTE( 8);
 648                                                 LERPBYTE( 9);
 649                                                 LERPBYTE(10);
 650                                                 LERPBYTE(11);
 651                                                 LERPBYTE(12);
 652                                                 LERPBYTE(13);
 653                                                 LERPBYTE(14);
 654                                                 LERPBYTE(15);
 655                                                 out += 16;
 656                                                 row1 += 16;
 657                                                 row2 += 16;
 658                                                 j -= 4;
 659                                         }
 660                                         if (j & 2)
 661                                         {
 662                                                 LERPBYTE( 0);
 663                                                 LERPBYTE( 1);
 664                                                 LERPBYTE( 2);
 665                                                 LERPBYTE( 3);
 666                                                 LERPBYTE( 4);
 667                                                 LERPBYTE( 5);
 668                                                 LERPBYTE( 6);
 669                                                 LERPBYTE( 7);
 670                                                 out += 8;
 671                                                 row1 += 8;
 672                                                 row2 += 8;
 673                                         }
 674                                         if (j & 1)
 675                                         {
 676                                                 LERPBYTE( 0);
 677                                                 LERPBYTE( 1);
 678                                                 LERPBYTE( 2);
 679                                                 LERPBYTE( 3);
 680                                                 out += 4;
 681                                                 row1 += 4;
 682                                                 row2 += 4;
 683                                         }
 684                                         row1 -= outwidth4;
 685                                         row2 -= outwidth4;
 686                                 }
 687                                 else
 688                                 {
 689                                         if (yi != oldy)
 690                                         {
 691                                                 inrow = (qbyte *)indata + inwidth4*yi;
 692                                                 if (yi == oldy+1)
 693                                                         memcpy(row1, row2, outwidth4);
 694                                                 else
 695                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 696                                                 oldy = yi;
 697                                         }
 698                                         memcpy(out, row1, outwidth4);
 699                                 }
 700                         }
 701                 }
 702                 else
 703                 {
 704                         int i, j;
 705                         unsigned frac, fracstep;
 706                         // relies on int being 4 bytes
 707                         int *inrow, *out;
 708                         out = outdata;
 709
 710                         fracstep = inwidth*0x10000/outwidth;
 711                         for (i = 0;i < outheight;i++)
 712                         {
 713                                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
 714                                 frac = fracstep >> 1;
 715                                 j = outwidth - 4;
 716                                 while (j >= 0)
 717                                 {
 718                                         out[0] = inrow[frac >> 16];frac += fracstep;
 719                                         out[1] = inrow[frac >> 16];frac += fracstep;
 720                                         out[2] = inrow[frac >> 16];frac += fracstep;
 721                                         out[3] = inrow[frac >> 16];frac += fracstep;
 722                                         out += 4;
 723                                         j -= 4;
 724                                 }
 725                                 if (j & 2)
 726                                 {
 727                                         out[0] = inrow[frac >> 16];frac += fracstep;
 728                                         out[1] = inrow[frac >> 16];frac += fracstep;
 729                                         out += 2;
 730                                 }
 731                                 if (j & 1)
 732                                 {
 733                                         out[0] = inrow[frac >> 16];frac += fracstep;
 734                                         out += 1;
 735                                 }
 736                         }
 737                 }
 738         }
 739         else if (bytesperpixel == 3)
 740         {
 741                 if (r_lerpimages.integer)
 742                 {
 743                         int i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
 744                         qbyte *inrow, *out;
 745                         out = outdata;
 746                         fstep = (int) (inheight*65536.0f/outheight);
 747
 748                         inrow = indata;
 749                         oldy = 0;
 750                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 751                         R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
 752                         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 753                         {
 754                                 yi = f >> 16;
 755                                 if (yi < endy)
 756                                 {
 757                                         lerp = f & 0xFFFF;
 758                                         if (yi != oldy)
 759                                         {
 760                                                 inrow = (qbyte *)indata + inwidth3*yi;
 761                                                 if (yi == oldy+1)
 762                                                         memcpy(row1, row2, outwidth3);
 763                                                 else
 764                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 765                                                 R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
 766                                                 oldy = yi;
 767                                         }
 768                                         j = outwidth - 4;
 769                                         while(j >= 0)
 770                                         {
 771 #define LERPBYTE(i) out[i] = (qbyte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
 772                                                 LERPBYTE( 0);
 773                                                 LERPBYTE( 1);
 774                                                 LERPBYTE( 2);
 775                                                 LERPBYTE( 3);
 776                                                 LERPBYTE( 4);
 777                                                 LERPBYTE( 5);
 778                                                 LERPBYTE( 6);
 779                                                 LERPBYTE( 7);
 780                                                 LERPBYTE( 8);
 781                                                 LERPBYTE( 9);
 782                                                 LERPBYTE(10);
 783                                                 LERPBYTE(11);
 784                                                 out += 12;
 785                                                 row1 += 12;
 786                                                 row2 += 12;
 787                                                 j -= 4;
 788                                         }
 789                                         if (j & 2)
 790                                         {
 791                                                 LERPBYTE( 0);
 792                                                 LERPBYTE( 1);
 793                                                 LERPBYTE( 2);
 794                                                 LERPBYTE( 3);
 795                                                 LERPBYTE( 4);
 796                                                 LERPBYTE( 5);
 797                                                 out += 6;
 798                                                 row1 += 6;
 799                                                 row2 += 6;
 800                                         }
 801                                         if (j & 1)
 802                                         {
 803                                                 LERPBYTE( 0);
 804                                                 LERPBYTE( 1);
 805                                                 LERPBYTE( 2);
 806                                                 out += 3;
 807                                                 row1 += 3;
 808                                                 row2 += 3;
 809                                         }
 810                                         row1 -= outwidth3;
 811                                         row2 -= outwidth3;
 812                                 }
 813                                 else
 814                                 {
 815                                         if (yi != oldy)
 816                                         {
 817                                                 inrow = (qbyte *)indata + inwidth3*yi;
 818                                                 if (yi == oldy+1)
 819                                                         memcpy(row1, row2, outwidth3);
 820                                                 else
 821                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 822                                                 oldy = yi;
 823                                         }
 824                                         memcpy(out, row1, outwidth3);
 825                                 }
 826                         }
 827                 }
 828                 else
 829                 {
 830                         int i, j, f, inwidth3 = inwidth * 3;
 831                         unsigned frac, fracstep;
 832                         qbyte *inrow, *out;
 833                         out = outdata;
 834
 835                         fracstep = inwidth*0x10000/outwidth;
 836                         for (i = 0;i < outheight;i++)
 837                         {
 838                                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
 839                                 frac = fracstep >> 1;
 840                                 j = outwidth - 4;
 841                                 while (j >= 0)
 842                                 {
 843                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 844                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 845                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 846                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 847                                         j -= 4;
 848                                 }
 849                                 if (j & 2)
 850                                 {
 851                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 852                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 853                                         out += 2;
 854                                 }
 855                                 if (j & 1)
 856                                 {
 857                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 858                                         out += 1;
 859                                 }
 860                         }
 861                 }
 862         }
 863         else
 864                 Sys_Error("R_ResampleTexture: unsupported bytesperpixel %i\n", bytesperpixel);
 865 #undef row1
 866 #undef row2
 867 }
 868
 869 // in can be the same as out
 870 static void R_MipReduce(qbyte *in, qbyte *out, int *width, int *height, int destwidth, int destheight, int bytesperpixel)
 871 {
 872         int x, y, nextrow;
 873         nextrow = *width * bytesperpixel;
 874         if (*width > destwidth)
 875         {
 876                 *width >>= 1;
 877                 if (*height > destheight)
 878                 {
 879                         // reduce both
 880                         *height >>= 1;
 881                         if (bytesperpixel == 4)
 882                         {
 883                                 for (y = 0;y < *height;y++)
 884                                 {
 885                                         for (x = 0;x < *width;x++)
 886                                         {
 887                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
 888                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
 889                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
 890                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
 891                                                 out += 4;
 892                                                 in += 8;
 893                                         }
 894                                         in += nextrow; // skip a line
 895                                 }
 896                         }
 897                         else if (bytesperpixel == 3)
 898                         {
 899                                 for (y = 0;y < *height;y++)
 900                                 {
 901                                         for (x = 0;x < *width;x++)
 902                                         {
 903                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
 904                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
 905                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
 906                                                 out += 3;
 907                                                 in += 6;
 908                                         }
 909                                         in += nextrow; // skip a line
 910                                 }
 911                         }
 912                         else
 913                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 914                 }
 915                 else
 916                 {
 917                         // reduce width
 918                         if (bytesperpixel == 4)
 919                         {
 920                                 for (y = 0;y < *height;y++)
 921                                 {
 922                                         for (x = 0;x < *width;x++)
 923                                         {
 924                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
 925                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
 926                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
 927                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
 928                                                 out += 4;
 929                                                 in += 8;
 930                                         }
 931                                 }
 932                         }
 933                         else if (bytesperpixel == 3)
 934                         {
 935                                 for (y = 0;y < *height;y++)
 936                                 {
 937                                         for (x = 0;x < *width;x++)
 938                                         {
 939                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
 940                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
 941                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
 942                                                 out += 3;
 943                                                 in += 6;
 944                                         }
 945                                 }
 946                         }
 947                         else
 948                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 949                 }
 950         }
 951         else
 952         {
 953                 if (*height > destheight)
 954                 {
 955                         // reduce height
 956                         *height >>= 1;
 957                         if (bytesperpixel == 4)
 958                         {
 959                                 for (y = 0;y < *height;y++)
 960                                 {
 961                                         for (x = 0;x < *width;x++)
 962                                         {
 963                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
 964                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
 965                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
 966                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
 967                                                 out += 4;
 968                                                 in += 4;
 969                                         }
 970                                         in += nextrow; // skip a line
 971                                 }
 972                         }
 973                         else if (bytesperpixel == 3)
 974                         {
 975                                 for (y = 0;y < *height;y++)
 976                                 {
 977                                         for (x = 0;x < *width;x++)
 978                                         {
 979                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
 980                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
 981                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
 982                                                 out += 3;
 983                                                 in += 3;
 984                                         }
 985                                         in += nextrow; // skip a line
 986                                 }
 987                         }
 988                         else
 989                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 990                 }
 991                 else
 992                         Sys_Error("R_MipReduce: desired size already achieved\n");
 993         }
 994 }
 995
 996 static void R_Upload(gltexture_t *glt, qbyte *data)
 997 {
 998         int mip, width, height, internalformat;
 999         qbyte *prevbuffer;
1000         prevbuffer = data;
1001
1002         glBindTexture(GL_TEXTURE_2D, glt->image->texnum);
1003         CHECKGLERROR
1004
1005         glt->flags &= ~GLTEXF_UPLOAD;
1006
1007         if (glt->flags & TEXF_FRAGMENT)
1008         {
1009                 if (resizebuffersize < glt->image->width * glt->image->height * glt->image->bytesperpixel)
1010                 {
1011                         resizebuffersize = glt->image->width * glt->image->height * glt->image->bytesperpixel;
1012                         if (resizebuffer)
1013                                 Mem_Free(resizebuffer);
1014                         if (colorconvertbuffer)
1015                                 Mem_Free(colorconvertbuffer);
1016                         resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1017                         colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1018                         if (!resizebuffer || !colorconvertbuffer)
1019                                 Host_Error("R_Upload: out of memory\n");
1020                 }
1021
1022                 if (glt->image->flags & GLTEXF_UPLOAD)
1023                 {
1024                         Con_DPrintf("uploaded new fragments image\n");
1025                         glt->image->flags &= ~GLTEXF_UPLOAD;
1026                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->bytesperpixel);
1027                         glTexImage2D (GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
1028                         CHECKGLERROR
1029                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
1030                         CHECKGLERROR
1031                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1032                         CHECKGLERROR
1033                 }
1034
1035                 if (prevbuffer == NULL)
1036                 {
1037                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->bytesperpixel);
1038                         prevbuffer = resizebuffer;
1039                 }
1040                 else if (glt->textype->textype == TEXTYPE_QPALETTE)
1041                 {
1042                         // promote paletted to RGBA, so we only have to worry about RGB and
1043                         // RGBA in the rest of this code
1044                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
1045                         prevbuffer = colorconvertbuffer;
1046                 }
1047
1048                 glTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1049                 CHECKGLERROR
1050                 return;
1051         }
1052
1053         glt->image->flags &= ~GLTEXF_UPLOAD;
1054
1055         // these are rounded up versions of the size to do better resampling
1056         for (width = 1;width < glt->width;width <<= 1);
1057         for (height = 1;height < glt->height;height <<= 1);
1058
1059         if (resizebuffersize < width * height * glt->image->bytesperpixel)
1060         {
1061                 resizebuffersize = width * height * glt->image->bytesperpixel;
1062                 if (resizebuffer)
1063                         Mem_Free(resizebuffer);
1064                 if (colorconvertbuffer)
1065                         Mem_Free(colorconvertbuffer);
1066                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1067                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1068                 if (!resizebuffer || !colorconvertbuffer)
1069                         Host_Error("R_Upload: out of memory\n");
1070         }
1071
1072         if (prevbuffer == NULL)
1073         {
1074                 width = glt->image->width;
1075                 height = glt->image->height;
1076                 memset(resizebuffer, 255, width * height * glt->image->bytesperpixel);
1077                 prevbuffer = resizebuffer;
1078         }
1079         else
1080         {
1081                 if (glt->textype->textype == TEXTYPE_QPALETTE)
1082                 {
1083                         // promote paletted to RGBA, so we only have to worry about RGB and
1084                         // RGBA in the rest of this code
1085                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
1086                         prevbuffer = colorconvertbuffer;
1087                 }
1088
1089                 if (glt->width != width || glt->height != height)
1090                 {
1091                         R_ResampleTexture(prevbuffer, glt->width, glt->height, resizebuffer, width, height, glt->image->bytesperpixel);
1092                         prevbuffer = resizebuffer;
1093                 }
1094
1095                 // apply picmip/max_size limitations
1096                 while (width > glt->image->width || height > glt->image->height)
1097                 {
1098                         R_MipReduce(prevbuffer, resizebuffer, &width, &height, glt->image->width, glt->image->height, glt->image->bytesperpixel);
1099                         prevbuffer = resizebuffer;
1100                 }
1101         }
1102
1103         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
1104         internalformat = 3;
1105         if (glt->flags & TEXF_ALPHA)
1106                 internalformat = 4;
1107
1108         mip = 0;
1109         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1110         CHECKGLERROR
1111         if (glt->flags & TEXF_MIPMAP)
1112         {
1113                 while (width > 1 || height > 1)
1114                 {
1115                         R_MipReduce(prevbuffer, resizebuffer, &width, &height, 1, 1, glt->image->bytesperpixel);
1116                         prevbuffer = resizebuffer;
1117
1118                         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1119                         CHECKGLERROR
1120                 }
1121
1122                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
1123                 CHECKGLERROR
1124                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1125                 CHECKGLERROR
1126         }
1127         else
1128         {
1129                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
1130                 CHECKGLERROR
1131                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1132                 CHECKGLERROR
1133         }
1134 }
1135
1136 static void R_FindImageForTexture(gltexture_t *glt)
1137 {
1138         int i, j, best, best2, x, y, w, h;
1139         textypeinfo_t *texinfo;
1140         gltexturepool_t *pool;
1141         gltextureimage_t *image, **imagechainpointer;
1142         texinfo = glt->textype;
1143         pool = glt->pool;
1144
1145         x = 0;
1146         y = 0;
1147         w = glt->width;
1148         h = glt->height;
1149         if (glt->flags & TEXF_FRAGMENT)
1150         {
1151                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
1152                 {
1153                         image = *imagechainpointer;
1154                         if (image->type != GLIMAGETYPE_FRAGMENTS)
1155                                 continue;
1156                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
1157                                 continue;
1158
1159                         // got a fragments texture, find a place in it if we can
1160                         best = block_size;
1161                         for (best = block_size, i = 0;i < block_size - w;i += texinfo->align)
1162                         {
1163                                 for (best2 = 0, j = 0;j < w;j++)
1164                                 {
1165                                         if (image->blockallocation[i+j] >= best)
1166                                                 break;
1167                                         if (best2 < image->blockallocation[i+j])
1168                                                 best2 = image->blockallocation[i+j];
1169                                 }
1170                                 if (j == w)
1171                                 {
1172                                         // this is a valid spot
1173                                         x = i;
1174                                         y = best = best2;
1175                                 }
1176                         }
1177
1178                         if (best + h > block_size)
1179                                 continue;
1180
1181                         for (i = 0;i < w;i++)
1182                                 image->blockallocation[x + i] = best + h;
1183
1184                         glt->x = x;
1185                         glt->y = y;
1186                         glt->image = image;
1187                         image->texturecount++;
1188                         return;
1189                 }
1190
1191                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
1192                 if (image == NULL)
1193                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
1194                 //memset(image, 0, sizeof(*image));
1195                 image->type = GLIMAGETYPE_FRAGMENTS;
1196                 image->width = block_size;
1197                 image->height = block_size;
1198                 image->blockallocation = Mem_Alloc(texturemempool, block_size * sizeof(short));
1199                 memset(image->blockallocation, 0, block_size * sizeof(short));
1200
1201                 x = 0;
1202                 y = 0;
1203                 for (i = 0;i < w;i++)
1204                         image->blockallocation[x + i] = y + h;
1205         }
1206         else
1207         {
1208                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
1209
1210                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
1211                 if (image == NULL)
1212                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
1213                 //memset(image, 0, sizeof(*image));
1214                 image->type = GLIMAGETYPE_TILE;
1215                 image->blockallocation = NULL;
1216
1217                 // calculate final size
1218                 if (r_max_size.integer > realmaxsize)
1219                         Cvar_SetValue("r_max_size", realmaxsize);
1220                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
1221                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
1222                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
1223                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
1224                 if (image->width < 1) image->width = 1;
1225                 if (image->height < 1) image->height = 1;
1226         }
1227         image->glinternalformat = texinfo->glinternalformat;
1228         image->glformat = texinfo->glformat;
1229         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA)) | GLTEXF_UPLOAD;
1230         image->bytesperpixel = texinfo->internalbytesperpixel;
1231         for (i = 1;i < MAX_GLTEXTURES;i++)
1232                 if (!gltexnuminuse[i])
1233                         break;
1234         if (i < MAX_GLTEXTURES)
1235                 gltexnuminuse[image->texnum = i] = true;
1236         else
1237                 Sys_Error("R_FindImageForTexture: ran out of GL textures\n");
1238         *imagechainpointer = image;
1239         image->texturecount++;
1240
1241         glt->x = x;
1242         glt->y = y;
1243         glt->image = image;
1244 }
1245
1246 // note: R_FindImageForTexture must be called before this
1247 static void R_UploadTexture (gltexture_t *glt)
1248 {
1249         if (!(glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL)))
1250                 return;
1251
1252         if (glt->flags & GLTEXF_PROCEDURAL)
1253         {
1254                 if (glt->generate)
1255                 {
1256                         if (texturebuffersize < glt->width * glt->height * glt->textype->inputbytesperpixel)
1257                         {
1258                                 if (texturebuffer)
1259                                         Mem_Free(texturebuffer);
1260                                 texturebuffersize = glt->width * glt->height * glt->textype->inputbytesperpixel;
1261                                 texturebuffer = Mem_Alloc(textureprocessingmempool, texturebuffersize);
1262                         }
1263
1264                         glt->generate(texturebuffer, glt->width, glt->height, (void *)glt->proceduraldata, glt->proceduraldatasize);
1265                 }
1266         }
1267         else
1268         {
1269                 R_Upload(glt, glt->inputtexels);
1270                 if (glt->inputtexels)
1271                 {
1272                         Mem_Free(glt->inputtexels);
1273                         glt->inputtexels = NULL;
1274                         glt->flags |= GLTEXF_DESTROYED;
1275                 }
1276                 else if (glt->flags & GLTEXF_DESTROYED)
1277                         Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
1278         }
1279 }
1280
1281 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)
1282 {
1283         gltexture_t *glt;
1284         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1285         //memset(glt, 0, sizeof(gltexture_t));
1286         if (identifier)
1287         {
1288                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1289                 strcpy (glt->identifier, identifier);
1290         }
1291         else
1292                 glt->identifier = NULL;
1293         glt->pool = pool;
1294         glt->chain = pool->gltchain;
1295         pool->gltchain = glt;
1296         glt->crc = crc;
1297         glt->width = width;
1298         glt->height = height;
1299         glt->flags = flags;
1300         glt->textype = texinfo;
1301
1302         if (data)
1303         {
1304                 glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * texinfo->inputbytesperpixel);
1305                 if (glt->inputtexels == NULL)
1306                         Sys_Error("R_SetupTexture: out of memory\n");
1307                 memcpy(glt->inputtexels, data, glt->width * glt->height * texinfo->inputbytesperpixel);
1308         }
1309         else
1310                 glt->inputtexels = NULL;
1311
1312         glt->generate = generate;
1313         glt->proceduraldatasize = proceduraldatasize;
1314         if (proceduraldatasize)
1315         {
1316                 glt->proceduraldata = Mem_Alloc(texturemempool, proceduraldatasize);
1317                 if (glt->proceduraldata == NULL)
1318                         Sys_Error("R_SetupTexture: out of memory\n");
1319         }
1320         else
1321                 glt->proceduraldata = NULL;
1322
1323         R_FindImageForTexture(glt);
1324         R_PrecacheTexture(glt);
1325
1326         return glt;
1327 }
1328
1329 /*
1330 ================
1331 R_LoadTexture
1332 ================
1333 */
1334 rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, qbyte *data, int textype, int flags)
1335 {
1336         int i;
1337         gltexture_t *glt;
1338         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1339         textypeinfo_t *texinfo;
1340         unsigned short crc;
1341
1342         if (cls.state == ca_dedicated)
1343                 return NULL;
1344
1345         texinfo = R_GetTexTypeInfo(textype, flags);
1346
1347         // data can be NULL
1348 //      if (data == NULL)
1349 //              Host_Error("R_LoadTexture: \"%s\" has no data\n", identifier);
1350
1351         if (flags & TEXF_FRAGMENT)
1352         {
1353                 if (width > block_size || height > block_size)
1354                         Host_Error("R_LoadTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
1355                 if ((width * texinfo->internalbytesperpixel) & 3)
1356                         Host_Error("R_LoadTexture: incompatible width for fragment");
1357         }
1358
1359         // clear the alpha flag if the texture has no transparent pixels
1360         switch(textype)
1361         {
1362         case TEXTYPE_QPALETTE:
1363                 if (flags & TEXF_ALPHA)
1364                 {
1365                         flags &= ~TEXF_ALPHA;
1366                         for (i = 0;i < width * height;i++)
1367                         {
1368                                 if (data[i] == 255)
1369                                 {
1370                                         flags |= TEXF_ALPHA;
1371                                         break;
1372                                 }
1373                         }
1374                 }
1375                 break;
1376         case TEXTYPE_RGB:
1377                 if (flags & TEXF_ALPHA)
1378                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
1379                 break;
1380         case TEXTYPE_RGBA:
1381                 if (flags & TEXF_ALPHA)
1382                 {
1383                         flags &= ~TEXF_ALPHA;
1384                         for (i = 0;i < width * height;i++)
1385                         {
1386                                 if (data[i * 4 + 3] < 255)
1387                                 {
1388                                         flags |= TEXF_ALPHA;
1389                                         break;
1390                                 }
1391                         }
1392                 }
1393                 break;
1394         default:
1395                 Host_Error("R_LoadTexture: unknown texture type\n");
1396         }
1397
1398         // LordHavoc: do a CRC to confirm the data really is the same as previous occurances.
1399         if (data == NULL)
1400                 crc = 0;
1401         else
1402                 crc = CRC_Block(data, width*height*texinfo->inputbytesperpixel);
1403
1404         // see if the texture is already present
1405         if (identifier && (glt = R_FindTexture(pool, identifier)))
1406         {
1407                 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)
1408                 {
1409                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
1410                         return (rtexture_t *)glt; // exact match, use existing
1411                 }
1412                 Con_Printf("R_LoadTexture: cache mismatch on %s, replacing old texture\n", identifier);
1413                 R_FreeTexture(glt);
1414         }
1415
1416         return (rtexture_t *)R_SetupTexture(pool, identifier, crc, width, height, flags | GLTEXF_UPLOAD, texinfo, data, NULL, NULL, 0);
1417 }
1418
1419 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)
1420 {
1421         gltexture_t             *glt;
1422         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1423         textypeinfo_t   *texinfo;
1424
1425         if (cls.state == ca_dedicated)
1426                 return NULL;
1427
1428         texinfo = R_GetTexTypeInfo(textype, flags);
1429
1430         // no function is supported, for odd uses
1431 //      if (generate == NULL)
1432 //              Host_Error("R_ProceduralTexture: \"%s\" has no generate function\n", identifier);
1433         if (flags & TEXF_FRAGMENT)
1434         {
1435                 if (width > block_size || height > block_size)
1436                         Host_Error("R_ProceduralTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
1437                 if ((width * texinfo->internalbytesperpixel) & 3)
1438                         Host_Error("R_ProceduralTexture: incompatible width for fragment");
1439         }
1440
1441         // see if the texture is already present
1442         if (identifier && (glt = R_FindTexture(pool, identifier)))
1443         {
1444                 if (width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
1445                 {
1446                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
1447                         return (rtexture_t *)glt; // exact match, use existing
1448                 }
1449                 Con_Printf("R_LoadTexture: cache mismatch, replacing old texture\n");
1450                 R_FreeTexture(glt);
1451         }
1452
1453         return (rtexture_t *)R_SetupTexture(pool, identifier, 0, width, height, flags | GLTEXF_PROCEDURAL | GLTEXF_UPLOAD, texinfo, NULL, generate, proceduraldata, proceduraldatasize);
1454 }
1455
1456 int R_TextureHasAlpha(rtexture_t *rt)
1457 {
1458         gltexture_t *glt;
1459         if (!rt)
1460                 return false;
1461         glt = (gltexture_t *)rt;
1462         return (glt->flags & TEXF_ALPHA) != 0;
1463 }
1464
1465 int R_TextureWidth(rtexture_t *rt)
1466 {
1467         if (!rt)
1468                 return false;
1469         return ((gltexture_t *)rt)->width;
1470 }
1471
1472 int R_TextureHeight(rtexture_t *rt)
1473 {
1474         if (!rt)
1475                 return false;
1476         return ((gltexture_t *)rt)->height;
1477 }
1478
1479 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1480 {
1481         gltexture_t *glt;
1482         float iwidth, iheight;
1483         if (cls.state == ca_dedicated)
1484         {
1485                 if (x)
1486                         *x = 0;
1487                 if (y)
1488                         *y = 0;
1489                 if (fx1 || fy1 || fx2 || fy2)
1490                 {
1491                         if (fx1)
1492                                 *fx1 = 0;
1493                         if (fy1)
1494                                 *fy1 = 0;
1495                         if (fx2)
1496                                 *fx2 = 1;
1497                         if (fy2)
1498                                 *fy2 = 1;
1499                 }
1500                 return;
1501         }
1502         if (!rt)
1503                 Host_Error("R_FragmentLocation: no texture supplied\n");
1504         glt = (gltexture_t *)rt;
1505         if (glt->flags & TEXF_FRAGMENT)
1506         {
1507                 if (x)
1508                         *x = glt->x;
1509                 if (y)
1510                         *y = glt->y;
1511                 if (fx1 || fy1 || fx2 || fy2)
1512                 {
1513                         iwidth = 1.0f / glt->image->width;
1514                         iheight = 1.0f / glt->image->height;
1515                         if (fx1)
1516                                 *fx1 = glt->x * iwidth;
1517                         if (fy1)
1518                                 *fy1 = glt->y * iheight;
1519                         if (fx2)
1520                                 *fx2 = (glt->x + glt->width) * iwidth;
1521                         if (fy2)
1522                                 *fy2 = (glt->y + glt->height) * iheight;
1523                 }
1524         }
1525         else
1526         {
1527                 if (x)
1528                         *x = 0;
1529                 if (y)
1530                         *y = 0;
1531                 if (fx1 || fy1 || fx2 || fy2)
1532                 {
1533                         if (fx1)
1534                                 *fx1 = 0;
1535                         if (fy1)
1536                                 *fy1 = 0;
1537                         if (fx2)
1538                                 *fx2 = 1;
1539                         if (fy2)
1540                                 *fy2 = 1;
1541                 }
1542         }
1543 }
1544
1545 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1546 {
1547         textypeinfo_t *texinfo = R_GetTexTypeInfo(textype, flags);
1548         while ((width * texinfo->internalbytesperpixel) & 3)
1549                 width++;
1550         return width;
1551 }
1552
1553 void R_UpdateTexture(rtexture_t *rt, qbyte *data)
1554 {
1555         gltexture_t *glt;
1556         if (rt == NULL)
1557                 Host_Error("R_UpdateTexture: no texture supplied\n");
1558         if (data == NULL)
1559                 Host_Error("R_UpdateTexture: no data supplied\n");
1560         glt = (gltexture_t *)rt;
1561         /*
1562         if (!(glt->flags & GLTEXF_PROCEDURAL))
1563         {
1564                 if (glt->inputtexels == NULL)
1565                 {
1566                         glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * glt->textype->inputbytesperpixel);
1567                         if (glt->inputtexels == NULL)
1568                                 Host_Error("R_UpdateTexture: ran out of memory\n");
1569                 }
1570                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1571         }
1572         R_Upload(glt, data);
1573         */
1574         // if it has not been uploaded yet, update the data that will be used when it is
1575         if (glt->inputtexels)
1576                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1577         else
1578                 R_Upload(glt, data);
1579 }
1580