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         if (texturemempool == NULL)
 267                 return NULL;
 268         pool = Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
 269         if (pool == NULL)
 270                 return NULL;
 271         //memset(pool, 0, sizeof(gltexturepool_t));
 272         pool->next = gltexturepoolchain;
 273         gltexturepoolchain = pool;
 274         pool->sentinel = TEXTUREPOOL_SENTINEL;
 275         return (rtexturepool_t *)pool;
 276 }
 277
 278 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
 279 {
 280         gltexturepool_t *pool, **poolpointer;
 281         if (rtexturepool == NULL)
 282                 return;
 283         if (*rtexturepool == NULL)
 284                 return;
 285         pool = (gltexturepool_t *)(*rtexturepool);
 286         *rtexturepool = NULL;
 287         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
 288                 Host_Error("R_FreeTexturePool: pool already freed\n");
 289         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
 290         if (*poolpointer == pool)
 291                 *poolpointer = pool->next;
 292         else
 293                 Host_Error("R_FreeTexturePool: pool not linked\n");
 294         while (pool->gltchain)
 295                 R_FreeTexture(pool->gltchain);
 296         if (pool->imagechain)
 297                 Sys_Error("R_FreeTexturePool: not all images freed\n");
 298         Mem_Free(pool);
 299 }
 300
 301
 302 typedef struct
 303 {
 304         char *name;
 305         int minification, magnification;
 306 }
 307 glmode_t;
 308
 309 static glmode_t modes[] =
 310 {
 311         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
 312         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
 313         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
 314         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
 315         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
 316         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
 317 };
 318
 319 static void GL_TextureMode_f (void)
 320 {
 321         int i;
 322         gltextureimage_t *image;
 323         gltexturepool_t *pool;
 324
 325         if (Cmd_Argc() == 1)
 326         {
 327                 for (i = 0;i < 6;i++)
 328                 {
 329                         if (gl_filter_min == modes[i].minification)
 330                         {
 331                                 Con_Printf ("%s\n", modes[i].name);
 332                                 return;
 333                         }
 334                 }
 335                 Con_Printf ("current filter is unknown???\n");
 336                 return;
 337         }
 338
 339         for (i = 0;i < 6;i++)
 340                 if (!Q_strcasecmp (modes[i].name, Cmd_Argv(1) ) )
 341                         break;
 342         if (i == 6)
 343         {
 344                 Con_Printf ("bad filter name\n");
 345                 return;
 346         }
 347
 348         gl_filter_min = modes[i].minification;
 349         gl_filter_mag = modes[i].magnification;
 350
 351         // change all the existing mipmap texture objects
 352         // FIXME: force renderer(/client/something?) restart instead?
 353         for (pool = gltexturepoolchain;pool;pool = pool->next)
 354         {
 355                 for (image = pool->imagechain;image;image = image->imagechain)
 356                 {
 357                         // only update already uploaded images
 358                         if (!(image->flags & GLTEXF_UPLOAD))
 359                         {
 360                                 glBindTexture(GL_TEXTURE_2D, image->texnum);
 361                                 if (image->flags & TEXF_MIPMAP)
 362                                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
 363                                 else
 364                                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
 365                                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
 366                         }
 367                 }
 368         }
 369 }
 370
 371 static int R_CalcTexelDataSize (gltexture_t *glt)
 372 {
 373         int width2, height2, size;
 374         if (glt->flags & TEXF_FRAGMENT)
 375                 size = glt->width * glt->height;
 376         else
 377         {
 378                 if (r_max_size.integer > realmaxsize)
 379                         Cvar_SetValue("r_max_size", realmaxsize);
 380                 // calculate final size
 381                 for (width2 = 1;width2 < glt->width;width2 <<= 1);
 382                 for (height2 = 1;height2 < glt->height;height2 <<= 1);
 383                 for (width2 >>= r_picmip.integer;width2 > r_max_size.integer;width2 >>= 1);
 384                 for (height2 >>= r_picmip.integer;height2 > r_max_size.integer;height2 >>= 1);
 385                 if (width2 < 1) width2 = 1;
 386                 if (height2 < 1) height2 = 1;
 387
 388                 size = 0;
 389                 if (glt->flags & TEXF_MIPMAP)
 390                 {
 391                         while (width2 > 1 || height2 > 1)
 392                         {
 393                                 size += width2 * height2;
 394                                 if (width2 > 1)
 395                                         width2 >>= 1;
 396                                 if (height2 > 1)
 397                                         height2 >>= 1;
 398                         }
 399                         size++; // count the last 1x1 mipmap
 400                 }
 401                 else
 402                         size = width2*height2;
 403         }
 404         size *= glt->textype->internalbytesperpixel;
 405
 406         return size;
 407 }
 408
 409 void R_TextureStats_PrintTotal(void)
 410 {
 411         int glsize, inputsize, total = 0, totalt = 0, totalp = 0, loaded = 0, loadedt = 0, loadedp = 0;
 412         gltexture_t *glt;
 413         gltexturepool_t *pool;
 414         for (pool = gltexturepoolchain;pool;pool = pool->next)
 415         {
 416                 for (glt = pool->gltchain;glt;glt = glt->chain)
 417                 {
 418                         glsize = R_CalcTexelDataSize(glt);
 419                         inputsize = glt->width * glt->height * glt->textype->inputbytesperpixel;
 420
 421                         total++;
 422                         totalt += glsize;
 423                         totalp += inputsize;
 424                         if (!(glt->flags & GLTEXF_UPLOAD))
 425                         {
 426                                 loaded++;
 427                                 loadedt += glsize;
 428                                 loadedp += inputsize;
 429                         }
 430                 }
 431         }
 432         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);
 433 }
 434
 435 static void R_TextureStats_f(void)
 436 {
 437         int loaded;
 438         gltexture_t *glt;
 439         gltexturepool_t *pool;
 440         Con_Printf("glsize input crc  loaded mip alpha name\n");
 441         for (pool = gltexturepoolchain;pool;pool = pool->next)
 442         {
 443                 for (glt = pool->gltchain;glt;glt = glt->chain)
 444                 {
 445                         loaded = !(glt->flags & GLTEXF_UPLOAD);
 446                         if (glt->flags & GLTEXF_PROCEDURAL)
 447                                 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>");
 448                         else
 449                                 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>");
 450                 }
 451                 Con_Printf("pool %10p\n", pool);
 452         }
 453         R_TextureStats_PrintTotal();
 454 }
 455
 456 char engineversion[40];
 457
 458 static void r_textures_start(void)
 459 {
 460         // deal with size limits of various drivers (3dfx in particular)
 461         glGetIntegerv(GL_MAX_TEXTURE_SIZE, &realmaxsize);
 462         CHECKGLERROR
 463
 464         // use the largest scrap texture size we can (not sure if this is really a good idea)
 465         for (block_size = 1;block_size < realmaxsize && block_size < r_max_scrapsize.integer;block_size <<= 1);
 466
 467         texturemempool = Mem_AllocPool("Texture Info");
 468         texturedatamempool = Mem_AllocPool("Texture Storage (not yet uploaded)");
 469         textureprocessingmempool = Mem_AllocPool("Texture Processing Buffers");
 470         gltexnuminuse = Mem_Alloc(texturemempool, MAX_GLTEXTURES);
 471         //memset(gltexnuminuse, 0, MAX_GLTEXTURES);
 472 }
 473
 474 static void r_textures_shutdown(void)
 475 {
 476         rtexturepool_t *temp;
 477         while(gltexturepoolchain)
 478         {
 479                 temp = (rtexturepool_t *) gltexturepoolchain;
 480                 R_FreeTexturePool(&temp);
 481         }
 482
 483         /*
 484         if (resizebuffer) Mem_Free(resizebuffer);resizebuffer = NULL;
 485         if (colorconvertbuffer) Mem_Free(colorconvertbuffer);colorconvertbuffer = NULL;
 486         if (resamplerow1) Mem_Free(resamplerow1);resamplerow1 = NULL;
 487         if (resamplerow2) Mem_Free(resamplerow2);resamplerow2 = NULL;
 488         if (texturebuffer) Mem_Free(texturebuffer);texturebuffer = NULL;
 489         if (gltexnuminuse) Mem_Free(gltexnuminuse);gltexnuminuse = NULL;
 490         */
 491         resizebuffersize = 0;
 492         resamplerowsize = 0;
 493         texturebuffersize = 0;
 494         resizebuffer = NULL;
 495         colorconvertbuffer = NULL;
 496         resamplerow1 = NULL;
 497         resamplerow2 = NULL;
 498         texturebuffer = NULL;
 499         gltexnuminuse = NULL;
 500         Mem_FreePool(&texturemempool);
 501         Mem_FreePool(&texturedatamempool);
 502         Mem_FreePool(&textureprocessingmempool);
 503 }
 504
 505 static void r_textures_newmap(void)
 506 {
 507 }
 508
 509 void R_Textures_Init (void)
 510 {
 511         Cmd_AddCommand ("gl_texturemode", &GL_TextureMode_f);
 512         Cmd_AddCommand("r_texturestats", R_TextureStats_f);
 513         Cvar_RegisterVariable (&r_max_scrapsize);
 514         Cvar_RegisterVariable (&r_max_size);
 515         Cvar_RegisterVariable (&r_picmip);
 516         Cvar_RegisterVariable (&r_lerpimages);
 517         Cvar_RegisterVariable (&r_precachetextures);
 518         gltexnuminuse = NULL;
 519
 520         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
 521 }
 522
 523 static void R_ResampleTextureLerpLine (byte *in, byte *out, int inwidth, int outwidth, int bytesperpixel)
 524 {
 525         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 526         fstep = (int) (inwidth*65536.0f/outwidth);
 527         endx = (inwidth-1);
 528         if (bytesperpixel == 4)
 529         {
 530                 for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 531                 {
 532                         xi = f >> 16;
 533                         if (xi != oldx)
 534                         {
 535                                 in += (xi - oldx) * 4;
 536                                 oldx = xi;
 537                         }
 538                         if (xi < endx)
 539                         {
 540                                 lerp = f & 0xFFFF;
 541                                 *out++ = (byte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 542                                 *out++ = (byte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 543                                 *out++ = (byte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 544                                 *out++ = (byte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 545                         }
 546                         else // last pixel of the line has no pixel to lerp to
 547                         {
 548                                 *out++ = in[0];
 549                                 *out++ = in[1];
 550                                 *out++ = in[2];
 551                                 *out++ = in[3];
 552                         }
 553                 }
 554         }
 555         else if (bytesperpixel == 3)
 556         {
 557                 for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 558                 {
 559                         xi = f >> 16;
 560                         if (xi != oldx)
 561                         {
 562                                 in += (xi - oldx) * 3;
 563                                 oldx = xi;
 564                         }
 565                         if (xi < endx)
 566                         {
 567                                 lerp = f & 0xFFFF;
 568                                 *out++ = (byte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 569                                 *out++ = (byte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 570                                 *out++ = (byte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 571                         }
 572                         else // last pixel of the line has no pixel to lerp to
 573                         {
 574                                 *out++ = in[0];
 575                                 *out++ = in[1];
 576                                 *out++ = in[2];
 577                         }
 578                 }
 579         }
 580         else
 581                 Sys_Error("R_ResampleTextureLerpLine: unsupported bytesperpixel %i\n", bytesperpixel);
 582 }
 583
 584 /*
 585 ================
 586 R_ResampleTexture
 587 ================
 588 */
 589 static void R_ResampleTexture (void *indata, int inwidth, int inheight, void *outdata,  int outwidth, int outheight, int bytesperpixel)
 590 {
 591         if (resamplerowsize < outwidth*4)
 592         {
 593                 if (resamplerow1)
 594                         Mem_Free(resamplerow1);
 595                 if (resamplerow2)
 596                         Mem_Free(resamplerow2);
 597                 resamplerowsize = outwidth*4;
 598                 resamplerow1 = Mem_Alloc(textureprocessingmempool, resamplerowsize);
 599                 resamplerow2 = Mem_Alloc(textureprocessingmempool, resamplerowsize);
 600         }
 601 #define row1 resamplerow1
 602 #define row2 resamplerow2
 603         if (bytesperpixel == 4)
 604         {
 605                 if (r_lerpimages.integer)
 606                 {
 607                         int             i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
 608                         byte    *inrow, *out;
 609                         out = outdata;
 610                         fstep = (int) (inheight*65536.0f/outheight);
 611
 612                         inrow = indata;
 613                         oldy = 0;
 614                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 615                         R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
 616                         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 617                         {
 618                                 yi = f >> 16;
 619                                 if (yi < endy)
 620                                 {
 621                                         lerp = f & 0xFFFF;
 622                                         if (yi != oldy)
 623                                         {
 624                                                 inrow = (byte *)indata + inwidth4*yi;
 625                                                 if (yi == oldy+1)
 626                                                         memcpy(row1, row2, outwidth4);
 627                                                 else
 628                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 629                                                 R_ResampleTextureLerpLine (inrow + inwidth4, row2, inwidth, outwidth, bytesperpixel);
 630                                                 oldy = yi;
 631                                         }
 632                                         j = outwidth - 4;
 633                                         while(j >= 0)
 634                                         {
 635 #define LERPBYTE(i) out[i] = (byte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
 636                                                 LERPBYTE( 0);
 637                                                 LERPBYTE( 1);
 638                                                 LERPBYTE( 2);
 639                                                 LERPBYTE( 3);
 640                                                 LERPBYTE( 4);
 641                                                 LERPBYTE( 5);
 642                                                 LERPBYTE( 6);
 643                                                 LERPBYTE( 7);
 644                                                 LERPBYTE( 8);
 645                                                 LERPBYTE( 9);
 646                                                 LERPBYTE(10);
 647                                                 LERPBYTE(11);
 648                                                 LERPBYTE(12);
 649                                                 LERPBYTE(13);
 650                                                 LERPBYTE(14);
 651                                                 LERPBYTE(15);
 652                                                 out += 16;
 653                                                 row1 += 16;
 654                                                 row2 += 16;
 655                                                 j -= 4;
 656                                         }
 657                                         if (j & 2)
 658                                         {
 659                                                 LERPBYTE( 0);
 660                                                 LERPBYTE( 1);
 661                                                 LERPBYTE( 2);
 662                                                 LERPBYTE( 3);
 663                                                 LERPBYTE( 4);
 664                                                 LERPBYTE( 5);
 665                                                 LERPBYTE( 6);
 666                                                 LERPBYTE( 7);
 667                                                 out += 8;
 668                                                 row1 += 8;
 669                                                 row2 += 8;
 670                                         }
 671                                         if (j & 1)
 672                                         {
 673                                                 LERPBYTE( 0);
 674                                                 LERPBYTE( 1);
 675                                                 LERPBYTE( 2);
 676                                                 LERPBYTE( 3);
 677                                                 out += 4;
 678                                                 row1 += 4;
 679                                                 row2 += 4;
 680                                         }
 681                                         row1 -= outwidth4;
 682                                         row2 -= outwidth4;
 683                                 }
 684                                 else
 685                                 {
 686                                         if (yi != oldy)
 687                                         {
 688                                                 inrow = (byte *)indata + inwidth4*yi;
 689                                                 if (yi == oldy+1)
 690                                                         memcpy(row1, row2, outwidth4);
 691                                                 else
 692                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 693                                                 oldy = yi;
 694                                         }
 695                                         memcpy(out, row1, outwidth4);
 696                                 }
 697                         }
 698                 }
 699                 else
 700                 {
 701                         int i, j;
 702                         unsigned frac, fracstep;
 703                         // relies on int being 4 bytes
 704                         int *inrow, *out;
 705                         out = outdata;
 706
 707                         fracstep = inwidth*0x10000/outwidth;
 708                         for (i = 0;i < outheight;i++)
 709                         {
 710                                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
 711                                 frac = fracstep >> 1;
 712                                 j = outwidth - 4;
 713                                 while (j >= 0)
 714                                 {
 715                                         out[0] = inrow[frac >> 16];frac += fracstep;
 716                                         out[1] = inrow[frac >> 16];frac += fracstep;
 717                                         out[2] = inrow[frac >> 16];frac += fracstep;
 718                                         out[3] = inrow[frac >> 16];frac += fracstep;
 719                                         out += 4;
 720                                         j -= 4;
 721                                 }
 722                                 if (j & 2)
 723                                 {
 724                                         out[0] = inrow[frac >> 16];frac += fracstep;
 725                                         out[1] = inrow[frac >> 16];frac += fracstep;
 726                                         out += 2;
 727                                 }
 728                                 if (j & 1)
 729                                 {
 730                                         out[0] = inrow[frac >> 16];frac += fracstep;
 731                                         out += 1;
 732                                 }
 733                         }
 734                 }
 735         }
 736         else if (bytesperpixel == 3)
 737         {
 738                 if (r_lerpimages.integer)
 739                 {
 740                         int             i, j, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
 741                         byte    *inrow, *out;
 742                         out = outdata;
 743                         fstep = (int) (inheight*65536.0f/outheight);
 744
 745                         inrow = indata;
 746                         oldy = 0;
 747                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 748                         R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
 749                         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 750                         {
 751                                 yi = f >> 16;
 752                                 if (yi < endy)
 753                                 {
 754                                         lerp = f & 0xFFFF;
 755                                         if (yi != oldy)
 756                                         {
 757                                                 inrow = (byte *)indata + inwidth3*yi;
 758                                                 if (yi == oldy+1)
 759                                                         memcpy(row1, row2, outwidth3);
 760                                                 else
 761                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 762                                                 R_ResampleTextureLerpLine (inrow + inwidth3, row2, inwidth, outwidth, bytesperpixel);
 763                                                 oldy = yi;
 764                                         }
 765                                         j = outwidth - 4;
 766                                         while(j >= 0)
 767                                         {
 768 #define LERPBYTE(i) out[i] = (byte) ((((row2[i] - row1[i]) * lerp) >> 16) + row1[i])
 769                                                 LERPBYTE( 0);
 770                                                 LERPBYTE( 1);
 771                                                 LERPBYTE( 2);
 772                                                 LERPBYTE( 3);
 773                                                 LERPBYTE( 4);
 774                                                 LERPBYTE( 5);
 775                                                 LERPBYTE( 6);
 776                                                 LERPBYTE( 7);
 777                                                 LERPBYTE( 8);
 778                                                 LERPBYTE( 9);
 779                                                 LERPBYTE(10);
 780                                                 LERPBYTE(11);
 781                                                 out += 12;
 782                                                 row1 += 12;
 783                                                 row2 += 12;
 784                                                 j -= 4;
 785                                         }
 786                                         if (j & 2)
 787                                         {
 788                                                 LERPBYTE( 0);
 789                                                 LERPBYTE( 1);
 790                                                 LERPBYTE( 2);
 791                                                 LERPBYTE( 3);
 792                                                 LERPBYTE( 4);
 793                                                 LERPBYTE( 5);
 794                                                 out += 6;
 795                                                 row1 += 6;
 796                                                 row2 += 6;
 797                                         }
 798                                         if (j & 1)
 799                                         {
 800                                                 LERPBYTE( 0);
 801                                                 LERPBYTE( 1);
 802                                                 LERPBYTE( 2);
 803                                                 out += 3;
 804                                                 row1 += 3;
 805                                                 row2 += 3;
 806                                         }
 807                                         row1 -= outwidth3;
 808                                         row2 -= outwidth3;
 809                                 }
 810                                 else
 811                                 {
 812                                         if (yi != oldy)
 813                                         {
 814                                                 inrow = (byte *)indata + inwidth3*yi;
 815                                                 if (yi == oldy+1)
 816                                                         memcpy(row1, row2, outwidth3);
 817                                                 else
 818                                                         R_ResampleTextureLerpLine (inrow, row1, inwidth, outwidth, bytesperpixel);
 819                                                 oldy = yi;
 820                                         }
 821                                         memcpy(out, row1, outwidth3);
 822                                 }
 823                         }
 824                 }
 825                 else
 826                 {
 827                         int i, j, f, inwidth3 = inwidth * 3;
 828                         unsigned frac, fracstep;
 829                         byte *inrow, *out;
 830                         out = outdata;
 831
 832                         fracstep = inwidth*0x10000/outwidth;
 833                         for (i = 0;i < outheight;i++)
 834                         {
 835                                 inrow = (byte *)indata + inwidth3*(i*inheight/outheight);
 836                                 frac = fracstep >> 1;
 837                                 j = outwidth - 4;
 838                                 while (j >= 0)
 839                                 {
 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                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 843                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 844                                         j -= 4;
 845                                 }
 846                                 if (j & 2)
 847                                 {
 848                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 849                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 850                                         out += 2;
 851                                 }
 852                                 if (j & 1)
 853                                 {
 854                                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
 855                                         out += 1;
 856                                 }
 857                         }
 858                 }
 859         }
 860         else
 861                 Sys_Error("R_ResampleTexture: unsupported bytesperpixel %i\n", bytesperpixel);
 862 #undef row1
 863 #undef row2
 864 }
 865
 866 // in can be the same as out
 867 static void R_MipReduce(byte *in, byte *out, int *width, int *height, int destwidth, int destheight, int bytesperpixel)
 868 {
 869         int x, y, nextrow;
 870         nextrow = *width * bytesperpixel;
 871         if (*width > destwidth)
 872         {
 873                 *width >>= 1;
 874                 if (*height > destheight)
 875                 {
 876                         // reduce both
 877                         *height >>= 1;
 878                         if (bytesperpixel == 4)
 879                         {
 880                                 for (y = 0;y < *height;y++)
 881                                 {
 882                                         for (x = 0;x < *width;x++)
 883                                         {
 884                                                 out[0] = (byte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
 885                                                 out[1] = (byte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
 886                                                 out[2] = (byte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
 887                                                 out[3] = (byte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
 888                                                 out += 4;
 889                                                 in += 8;
 890                                         }
 891                                         in += nextrow; // skip a line
 892                                 }
 893                         }
 894                         else if (bytesperpixel == 3)
 895                         {
 896                                 for (y = 0;y < *height;y++)
 897                                 {
 898                                         for (x = 0;x < *width;x++)
 899                                         {
 900                                                 out[0] = (byte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
 901                                                 out[1] = (byte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
 902                                                 out[2] = (byte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
 903                                                 out += 3;
 904                                                 in += 6;
 905                                         }
 906                                         in += nextrow; // skip a line
 907                                 }
 908                         }
 909                         else
 910                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 911                 }
 912                 else
 913                 {
 914                         // reduce width
 915                         if (bytesperpixel == 4)
 916                         {
 917                                 for (y = 0;y < *height;y++)
 918                                 {
 919                                         for (x = 0;x < *width;x++)
 920                                         {
 921                                                 out[0] = (byte) ((in[0] + in[4]) >> 1);
 922                                                 out[1] = (byte) ((in[1] + in[5]) >> 1);
 923                                                 out[2] = (byte) ((in[2] + in[6]) >> 1);
 924                                                 out[3] = (byte) ((in[3] + in[7]) >> 1);
 925                                                 out += 4;
 926                                                 in += 8;
 927                                         }
 928                                 }
 929                         }
 930                         else if (bytesperpixel == 3)
 931                         {
 932                                 for (y = 0;y < *height;y++)
 933                                 {
 934                                         for (x = 0;x < *width;x++)
 935                                         {
 936                                                 out[0] = (byte) ((in[0] + in[3]) >> 1);
 937                                                 out[1] = (byte) ((in[1] + in[4]) >> 1);
 938                                                 out[2] = (byte) ((in[2] + in[5]) >> 1);
 939                                                 out += 3;
 940                                                 in += 6;
 941                                         }
 942                                 }
 943                         }
 944                         else
 945                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 946                 }
 947         }
 948         else
 949         {
 950                 if (*height > destheight)
 951                 {
 952                         // reduce height
 953                         *height >>= 1;
 954                         if (bytesperpixel == 4)
 955                         {
 956                                 for (y = 0;y < *height;y++)
 957                                 {
 958                                         for (x = 0;x < *width;x++)
 959                                         {
 960                                                 out[0] = (byte) ((in[0] + in[nextrow  ]) >> 1);
 961                                                 out[1] = (byte) ((in[1] + in[nextrow+1]) >> 1);
 962                                                 out[2] = (byte) ((in[2] + in[nextrow+2]) >> 1);
 963                                                 out[3] = (byte) ((in[3] + in[nextrow+3]) >> 1);
 964                                                 out += 4;
 965                                                 in += 4;
 966                                         }
 967                                         in += nextrow; // skip a line
 968                                 }
 969                         }
 970                         else if (bytesperpixel == 3)
 971                         {
 972                                 for (y = 0;y < *height;y++)
 973                                 {
 974                                         for (x = 0;x < *width;x++)
 975                                         {
 976                                                 out[0] = (byte) ((in[0] + in[nextrow  ]) >> 1);
 977                                                 out[1] = (byte) ((in[1] + in[nextrow+1]) >> 1);
 978                                                 out[2] = (byte) ((in[2] + in[nextrow+2]) >> 1);
 979                                                 out += 3;
 980                                                 in += 3;
 981                                         }
 982                                         in += nextrow; // skip a line
 983                                 }
 984                         }
 985                         else
 986                                 Sys_Error("R_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
 987                 }
 988                 else
 989                         Sys_Error("R_MipReduce: desired size already achieved\n");
 990         }
 991 }
 992
 993 static void R_Upload(gltexture_t *glt, byte *data)
 994 {
 995         int mip, width, height, internalformat;
 996         byte *prevbuffer;
 997         prevbuffer = data;
 998
 999         glBindTexture(GL_TEXTURE_2D, glt->image->texnum);
1000         CHECKGLERROR
1001
1002         glt->flags &= ~GLTEXF_UPLOAD;
1003
1004         if (glt->flags & TEXF_FRAGMENT)
1005         {
1006                 if (resizebuffersize < glt->image->width * glt->image->height * glt->image->bytesperpixel)
1007                 {
1008                         resizebuffersize = glt->image->width * glt->image->height * glt->image->bytesperpixel;
1009                         if (resizebuffer)
1010                                 Mem_Free(resizebuffer);
1011                         if (colorconvertbuffer)
1012                                 Mem_Free(colorconvertbuffer);
1013                         resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1014                         colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1015                         if (!resizebuffer || !colorconvertbuffer)
1016                                 Host_Error("R_Upload: out of memory\n");
1017                 }
1018
1019                 if (glt->image->flags & GLTEXF_UPLOAD)
1020                 {
1021                         Con_DPrintf("uploaded new fragments image\n");
1022                         glt->image->flags &= ~GLTEXF_UPLOAD;
1023                         memset(resizebuffer, 255, glt->image->width * glt->image->height * glt->image->bytesperpixel);
1024                         glTexImage2D (GL_TEXTURE_2D, 0, glt->image->glinternalformat, glt->image->width, glt->image->height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, resizebuffer);
1025                         CHECKGLERROR
1026                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
1027                         CHECKGLERROR
1028                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1029                         CHECKGLERROR
1030                 }
1031
1032                 if (prevbuffer == NULL)
1033                 {
1034                         memset(resizebuffer, 255, glt->width * glt->height * glt->image->bytesperpixel);
1035                         prevbuffer = resizebuffer;
1036                 }
1037                 else if (glt->textype->textype == TEXTYPE_QPALETTE)
1038                 {
1039                         // promote paletted to RGBA, so we only have to worry about RGB and
1040                         // RGBA in the rest of this code
1041                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
1042                         prevbuffer = colorconvertbuffer;
1043                 }
1044
1045                 glTexSubImage2D(GL_TEXTURE_2D, 0, glt->x, glt->y, glt->width, glt->height, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1046                 CHECKGLERROR
1047                 return;
1048         }
1049
1050         glt->image->flags &= ~GLTEXF_UPLOAD;
1051
1052         // these are rounded up versions of the size to do better resampling
1053         for (width = 1;width < glt->width;width <<= 1);
1054         for (height = 1;height < glt->height;height <<= 1);
1055
1056         if (resizebuffersize < width * height * glt->image->bytesperpixel)
1057         {
1058                 resizebuffersize = width * height * glt->image->bytesperpixel;
1059                 if (resizebuffer)
1060                         Mem_Free(resizebuffer);
1061                 if (colorconvertbuffer)
1062                         Mem_Free(colorconvertbuffer);
1063                 resizebuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1064                 colorconvertbuffer = Mem_Alloc(textureprocessingmempool, resizebuffersize);
1065                 if (!resizebuffer || !colorconvertbuffer)
1066                         Host_Error("R_Upload: out of memory\n");
1067         }
1068
1069         if (prevbuffer == NULL)
1070         {
1071                 width = glt->image->width;
1072                 height = glt->image->height;
1073                 memset(resizebuffer, 255, width * height * glt->image->bytesperpixel);
1074                 prevbuffer = resizebuffer;
1075         }
1076         else
1077         {
1078                 if (glt->textype->textype == TEXTYPE_QPALETTE)
1079                 {
1080                         // promote paletted to RGBA, so we only have to worry about RGB and
1081                         // RGBA in the rest of this code
1082                         Image_Copy8bitRGBA(prevbuffer, colorconvertbuffer, glt->width * glt->height, d_8to24table);
1083                         prevbuffer = colorconvertbuffer;
1084                 }
1085
1086                 if (glt->width != width || glt->height != height)
1087                 {
1088                         R_ResampleTexture(prevbuffer, glt->width, glt->height, resizebuffer, width, height, glt->image->bytesperpixel);
1089                         prevbuffer = resizebuffer;
1090                 }
1091
1092                 // apply picmip/max_size limitations
1093                 while (width > glt->image->width || height > glt->image->height)
1094                 {
1095                         R_MipReduce(prevbuffer, resizebuffer, &width, &height, glt->image->width, glt->image->height, glt->image->bytesperpixel);
1096                         prevbuffer = resizebuffer;
1097                 }
1098         }
1099
1100         // 3 and 4 are converted by the driver to it's preferred format for the current display mode
1101         internalformat = 3;
1102         if (glt->flags & TEXF_ALPHA)
1103                 internalformat = 4;
1104
1105         mip = 0;
1106         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1107         CHECKGLERROR
1108         if (glt->flags & TEXF_MIPMAP)
1109         {
1110                 while (width > 1 || height > 1)
1111                 {
1112                         R_MipReduce(prevbuffer, resizebuffer, &width, &height, 1, 1, glt->image->bytesperpixel);
1113                         prevbuffer = resizebuffer;
1114
1115                         glTexImage2D(GL_TEXTURE_2D, mip++, internalformat, width, height, 0, glt->image->glformat, GL_UNSIGNED_BYTE, prevbuffer);
1116                         CHECKGLERROR
1117                 }
1118
1119                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
1120                 CHECKGLERROR
1121                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1122                 CHECKGLERROR
1123         }
1124         else
1125         {
1126                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_mag);
1127                 CHECKGLERROR
1128                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_mag);
1129                 CHECKGLERROR
1130         }
1131 }
1132
1133 static void R_FindImageForTexture(gltexture_t *glt)
1134 {
1135         int i, j, best, best2, x, y, w, h;
1136         textypeinfo_t *texinfo;
1137         gltexturepool_t *pool;
1138         gltextureimage_t *image, **imagechainpointer;
1139         texinfo = glt->textype;
1140         pool = glt->pool;
1141
1142         x = 0;
1143         y = 0;
1144         w = glt->width;
1145         h = glt->height;
1146         if (glt->flags & TEXF_FRAGMENT)
1147         {
1148                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain)
1149                 {
1150                         image = *imagechainpointer;
1151                         if (image->type != GLIMAGETYPE_FRAGMENTS)
1152                                 continue;
1153                         if (image->glformat != texinfo->glformat || image->glinternalformat != texinfo->glinternalformat)
1154                                 continue;
1155
1156                         // got a fragments texture, find a place in it if we can
1157                         best = block_size;
1158                         for (best = block_size, i = 0;i < block_size - w;i += texinfo->align)
1159                         {
1160                                 for (best2 = 0, j = 0;j < w;j++)
1161                                 {
1162                                         if (image->blockallocation[i+j] >= best)
1163                                                 break;
1164                                         if (best2 < image->blockallocation[i+j])
1165                                                 best2 = image->blockallocation[i+j];
1166                                 }
1167                                 if (j == w)
1168                                 {
1169                                         // this is a valid spot
1170                                         x = i;
1171                                         y = best = best2;
1172                                 }
1173                         }
1174
1175                         if (best + h > block_size)
1176                                 continue;
1177
1178                         for (i = 0;i < w;i++)
1179                                 image->blockallocation[x + i] = best + h;
1180
1181                         glt->x = x;
1182                         glt->y = y;
1183                         glt->image = image;
1184                         image->texturecount++;
1185                         return;
1186                 }
1187
1188                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
1189                 if (image == NULL)
1190                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
1191                 //memset(image, 0, sizeof(*image));
1192                 image->type = GLIMAGETYPE_FRAGMENTS;
1193                 image->width = block_size;
1194                 image->height = block_size;
1195                 image->blockallocation = Mem_Alloc(texturemempool, block_size * sizeof(short));
1196                 memset(image->blockallocation, 0, block_size * sizeof(short));
1197
1198                 x = 0;
1199                 y = 0;
1200                 for (i = 0;i < w;i++)
1201                         image->blockallocation[x + i] = y + h;
1202         }
1203         else
1204         {
1205                 for (imagechainpointer = &pool->imagechain;*imagechainpointer;imagechainpointer = &(*imagechainpointer)->imagechain);
1206
1207                 image = Mem_Alloc(texturemempool, sizeof(gltextureimage_t));
1208                 if (image == NULL)
1209                         Sys_Error("R_FindImageForTexture: ran out of memory\n");
1210                 //memset(image, 0, sizeof(*image));
1211                 image->type = GLIMAGETYPE_TILE;
1212                 image->blockallocation = NULL;
1213
1214                 // calculate final size
1215                 if (r_max_size.integer > realmaxsize)
1216                         Cvar_SetValue("r_max_size", realmaxsize);
1217                 for (image->width = 1;image->width < glt->width;image->width <<= 1);
1218                 for (image->height = 1;image->height < glt->height;image->height <<= 1);
1219                 for (image->width >>= r_picmip.integer;image->width > r_max_size.integer;image->width >>= 1);
1220                 for (image->height >>= r_picmip.integer;image->height > r_max_size.integer;image->height >>= 1);
1221                 if (image->width < 1) image->width = 1;
1222                 if (image->height < 1) image->height = 1;
1223         }
1224         image->glinternalformat = texinfo->glinternalformat;
1225         image->glformat = texinfo->glformat;
1226         image->flags = (glt->flags & (TEXF_MIPMAP | TEXF_ALPHA)) | GLTEXF_UPLOAD;
1227         image->bytesperpixel = texinfo->internalbytesperpixel;
1228         for (i = 1;i < MAX_GLTEXTURES;i++)
1229                 if (!gltexnuminuse[i])
1230                         break;
1231         if (i < MAX_GLTEXTURES)
1232                 gltexnuminuse[image->texnum = i] = true;
1233         else
1234                 Sys_Error("R_FindImageForTexture: ran out of GL textures\n");
1235         *imagechainpointer = image;
1236         image->texturecount++;
1237
1238         glt->x = x;
1239         glt->y = y;
1240         glt->image = image;
1241 }
1242
1243 // note: R_FindImageForTexture must be called before this
1244 static void R_UploadTexture (gltexture_t *glt)
1245 {
1246         if (!(glt->flags & (GLTEXF_UPLOAD | GLTEXF_PROCEDURAL)))
1247                 return;
1248
1249         if (glt->flags & GLTEXF_PROCEDURAL)
1250         {
1251                 if (glt->generate)
1252                 {
1253                         if (texturebuffersize < glt->width * glt->height * glt->textype->inputbytesperpixel)
1254                         {
1255                                 if (texturebuffer)
1256                                         Mem_Free(texturebuffer);
1257                                 texturebuffersize = glt->width * glt->height * glt->textype->inputbytesperpixel;
1258                                 texturebuffer = Mem_Alloc(textureprocessingmempool, texturebuffersize);
1259                         }
1260
1261                         glt->generate(texturebuffer, glt->width, glt->height, (void *)glt->proceduraldata, glt->proceduraldatasize);
1262                 }
1263         }
1264         else
1265         {
1266                 R_Upload(glt, glt->inputtexels);
1267                 if (glt->inputtexels)
1268                 {
1269                         Mem_Free(glt->inputtexels);
1270                         glt->inputtexels = NULL;
1271                         glt->flags |= GLTEXF_DESTROYED;
1272                 }
1273                 else if (glt->flags & GLTEXF_DESTROYED)
1274                         Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
1275         }
1276 }
1277
1278 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)
1279 {
1280         gltexture_t *glt;
1281         glt = Mem_Alloc(texturemempool, sizeof(gltexture_t));
1282         //memset(glt, 0, sizeof(gltexture_t));
1283         if (identifier)
1284         {
1285                 glt->identifier = Mem_Alloc(texturemempool, strlen(identifier)+1);
1286                 strcpy (glt->identifier, identifier);
1287         }
1288         else
1289                 glt->identifier = NULL;
1290         glt->pool = pool;
1291         glt->chain = pool->gltchain;
1292         pool->gltchain = glt;
1293         glt->crc = crc;
1294         glt->width = width;
1295         glt->height = height;
1296         glt->flags = flags;
1297         glt->textype = texinfo;
1298
1299         if (data)
1300         {
1301                 glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * texinfo->inputbytesperpixel);
1302                 if (glt->inputtexels == NULL)
1303                         Sys_Error("R_SetupTexture: out of memory\n");
1304                 memcpy(glt->inputtexels, data, glt->width * glt->height * texinfo->inputbytesperpixel);
1305         }
1306         else
1307                 glt->inputtexels = NULL;
1308
1309         glt->generate = generate;
1310         glt->proceduraldatasize = proceduraldatasize;
1311         if (proceduraldatasize)
1312         {
1313                 glt->proceduraldata = Mem_Alloc(texturemempool, proceduraldatasize);
1314                 if (glt->proceduraldata == NULL)
1315                         Sys_Error("R_SetupTexture: out of memory\n");
1316         }
1317         else
1318                 glt->proceduraldata = NULL;
1319
1320         R_FindImageForTexture(glt);
1321         R_PrecacheTexture(glt);
1322
1323         return glt;
1324 }
1325
1326 /*
1327 ================
1328 R_LoadTexture
1329 ================
1330 */
1331 rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, byte *data, int textype, int flags)
1332 {
1333         int i;
1334         gltexture_t *glt;
1335         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1336         textypeinfo_t *texinfo;
1337         unsigned short crc;
1338
1339         if (cls.state == ca_dedicated)
1340                 return NULL;
1341
1342         texinfo = R_GetTexTypeInfo(textype, flags);
1343
1344         // data can be NULL
1345 //      if (data == NULL)
1346 //              Host_Error("R_LoadTexture: \"%s\" has no data\n", identifier);
1347
1348         if (flags & TEXF_FRAGMENT)
1349         {
1350                 if (width > block_size || height > block_size)
1351                         Host_Error("R_LoadTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
1352                 if ((width * texinfo->internalbytesperpixel) & 3)
1353                         Host_Error("R_LoadTexture: incompatible width for fragment");
1354         }
1355
1356         // clear the alpha flag if the texture has no transparent pixels
1357         switch(textype)
1358         {
1359         case TEXTYPE_QPALETTE:
1360                 if (flags & TEXF_ALPHA)
1361                 {
1362                         flags &= ~TEXF_ALPHA;
1363                         for (i = 0;i < width * height;i++)
1364                         {
1365                                 if (data[i] == 255)
1366                                 {
1367                                         flags |= TEXF_ALPHA;
1368                                         break;
1369                                 }
1370                         }
1371                 }
1372                 break;
1373         case TEXTYPE_RGB:
1374                 if (flags & TEXF_ALPHA)
1375                         Host_Error("R_LoadTexture: RGB has no alpha, don't specify TEXF_ALPHA\n");
1376                 break;
1377         case TEXTYPE_RGBA:
1378                 if (flags & TEXF_ALPHA)
1379                 {
1380                         flags &= ~TEXF_ALPHA;
1381                         for (i = 0;i < width * height;i++)
1382                         {
1383                                 if (data[i * 4 + 3] < 255)
1384                                 {
1385                                         flags |= TEXF_ALPHA;
1386                                         break;
1387                                 }
1388                         }
1389                 }
1390                 break;
1391         default:
1392                 Host_Error("R_LoadTexture: unknown texture type\n");
1393         }
1394
1395         // LordHavoc: do a CRC to confirm the data really is the same as previous occurances.
1396         if (data == NULL)
1397                 crc = 0;
1398         else
1399                 crc = CRC_Block(data, width*height*texinfo->inputbytesperpixel);
1400
1401         // see if the texture is already present
1402         if (identifier && (glt = R_FindTexture(pool, identifier)))
1403         {
1404                 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)
1405                 {
1406                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
1407                         return (rtexture_t *)glt; // exact match, use existing
1408                 }
1409                 Con_Printf("R_LoadTexture: cache mismatch on %s, replacing old texture\n", identifier);
1410                 R_FreeTexture(glt);
1411         }
1412
1413         return (rtexture_t *)R_SetupTexture(pool, identifier, crc, width, height, flags | GLTEXF_UPLOAD, texinfo, data, NULL, NULL, 0);
1414 }
1415
1416 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)
1417 {
1418         gltexture_t             *glt;
1419         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
1420         textypeinfo_t   *texinfo;
1421
1422         if (cls.state == ca_dedicated)
1423                 return NULL;
1424
1425         texinfo = R_GetTexTypeInfo(textype, flags);
1426
1427         // no function is supported, for odd uses
1428 //      if (generate == NULL)
1429 //              Host_Error("R_ProceduralTexture: \"%s\" has no generate function\n", identifier);
1430         if (flags & TEXF_FRAGMENT)
1431         {
1432                 if (width > block_size || height > block_size)
1433                         Host_Error("R_ProceduralTexture: fragment too big, must be no more than %dx%d\n", block_size, block_size);
1434                 if ((width * texinfo->internalbytesperpixel) & 3)
1435                         Host_Error("R_ProceduralTexture: incompatible width for fragment");
1436         }
1437
1438         // see if the texture is already present
1439         if (identifier && (glt = R_FindTexture(pool, identifier)))
1440         {
1441                 if (width == glt->width && height == glt->height && texinfo == glt->textype && ((flags ^ glt->flags) & TEXF_IMPORTANTBITS) == 0 && ((flags ^ glt->flags) & GLTEXF_IMPORTANTBITS) == 0)
1442                 {
1443                         Con_Printf("R_LoadTexture: exact match with existing texture %s\n", identifier);
1444                         return (rtexture_t *)glt; // exact match, use existing
1445                 }
1446                 Con_DPrintf("R_LoadTexture: cache mismatch, replacing old texture\n");
1447                 R_FreeTexture(glt);
1448         }
1449
1450         return (rtexture_t *)R_SetupTexture(pool, identifier, 0, width, height, flags | GLTEXF_PROCEDURAL | GLTEXF_UPLOAD, texinfo, NULL, generate, proceduraldata, proceduraldatasize);
1451 }
1452
1453 int R_TextureHasAlpha(rtexture_t *rt)
1454 {
1455         gltexture_t *glt;
1456         if (!rt)
1457                 return false;
1458         glt = (gltexture_t *)rt;
1459         return (glt->flags & TEXF_ALPHA) != 0;
1460 }
1461
1462 int R_TextureWidth(rtexture_t *rt)
1463 {
1464         if (!rt)
1465                 return false;
1466         return ((gltexture_t *)rt)->width;
1467 }
1468
1469 int R_TextureHeight(rtexture_t *rt)
1470 {
1471         if (!rt)
1472                 return false;
1473         return ((gltexture_t *)rt)->height;
1474 }
1475
1476 void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2)
1477 {
1478         gltexture_t *glt;
1479         float iwidth, iheight;
1480         if (cls.state == ca_dedicated)
1481         {
1482                 if (x)
1483                         *x = 0;
1484                 if (y)
1485                         *y = 0;
1486                 if (fx1 || fy1 || fx2 || fy2)
1487                 {
1488                         if (fx1)
1489                                 *fx1 = 0;
1490                         if (fy1)
1491                                 *fy1 = 0;
1492                         if (fx2)
1493                                 *fx2 = 1;
1494                         if (fy2)
1495                                 *fy2 = 1;
1496                 }
1497                 return;
1498         }
1499         if (!rt)
1500                 Host_Error("R_FragmentLocation: no texture supplied\n");
1501         glt = (gltexture_t *)rt;
1502         if (glt->flags & TEXF_FRAGMENT)
1503         {
1504                 if (x)
1505                         *x = glt->x;
1506                 if (y)
1507                         *y = glt->y;
1508                 if (fx1 || fy1 || fx2 || fy2)
1509                 {
1510                         iwidth = 1.0f / glt->image->width;
1511                         iheight = 1.0f / glt->image->height;
1512                         if (fx1)
1513                                 *fx1 = glt->x * iwidth;
1514                         if (fy1)
1515                                 *fy1 = glt->y * iheight;
1516                         if (fx2)
1517                                 *fx2 = (glt->x + glt->width) * iwidth;
1518                         if (fy2)
1519                                 *fy2 = (glt->y + glt->height) * iheight;
1520                 }
1521         }
1522         else
1523         {
1524                 if (x)
1525                         *x = 0;
1526                 if (y)
1527                         *y = 0;
1528                 if (fx1 || fy1 || fx2 || fy2)
1529                 {
1530                         if (fx1)
1531                                 *fx1 = 0;
1532                         if (fy1)
1533                                 *fy1 = 0;
1534                         if (fx2)
1535                                 *fx2 = 1;
1536                         if (fy2)
1537                                 *fy2 = 1;
1538                 }
1539         }
1540 }
1541
1542 int R_CompatibleFragmentWidth(int width, int textype, int flags)
1543 {
1544         textypeinfo_t *texinfo = R_GetTexTypeInfo(textype, flags);
1545         while ((width * texinfo->internalbytesperpixel) & 3)
1546                 width++;
1547         return width;
1548 }
1549
1550 void R_UpdateTexture(rtexture_t *rt, byte *data)
1551 {
1552         gltexture_t *glt;
1553         if (rt == NULL)
1554                 Host_Error("R_UpdateTexture: no texture supplied\n");
1555         if (data == NULL)
1556                 Host_Error("R_UpdateTexture: no data supplied\n");
1557         glt = (gltexture_t *)rt;
1558         /*
1559         if (!(glt->flags & GLTEXF_PROCEDURAL))
1560         {
1561                 if (glt->inputtexels == NULL)
1562                 {
1563                         glt->inputtexels = Mem_Alloc(texturedatamempool, glt->width * glt->height * glt->textype->inputbytesperpixel);
1564                         if (glt->inputtexels == NULL)
1565                                 Host_Error("R_UpdateTexture: ran out of memory\n");
1566                 }
1567                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1568         }
1569         R_Upload(glt, data);
1570         */
1571         // if it has not been uploaded yet, update the data that will be used when it is
1572         if (glt->inputtexels)
1573                 memcpy(glt->inputtexels, data, glt->width * glt->height * glt->textype->inputbytesperpixel);
1574         else
1575                 R_Upload(glt, data);
1576 }
1577