image.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5 #include "r_shadow.h"
   6
   7 int             image_width;
   8 int             image_height;
   9
  10 #if 1
  11 // written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
  12 void Image_CopyMux(qbyte *outpixels, const qbyte *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  13 {
  14         int index, c, x, y;
  15         const qbyte *in, *line;
  16         int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
  17         int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);
  18
  19         for (c = 0; c < numoutputcomponents; c++)
  20                 if (outputinputcomponentindices[c] & 0x80000000)
  21                         break;
  22         if (c < numoutputcomponents)
  23         {
  24                 // special indices used
  25                 if (inputflipdiagonal)
  26                 {
  27                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  28                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
  29                                         for (c = 0; c < numoutputcomponents; c++)
  30                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  31                 }
  32                 else
  33                 {
  34                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  35                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
  36                                         for (c = 0; c < numoutputcomponents; c++)
  37                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  38                 }
  39         }
  40         else
  41         {
  42                 // special indices not used
  43                 if (inputflipdiagonal)
  44                 {
  45                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  46                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
  47                                         for (c = 0; c < numoutputcomponents; c++)
  48                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  49                 }
  50                 else
  51                 {
  52                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  53                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
  54                                         for (c = 0; c < numoutputcomponents; c++)
  55                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  56                 }
  57         }
  58 }
  59 #else
  60 // intentionally readable version
  61 void Image_CopyMux(qbyte *outpixels, const qbyte *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  62 {
  63         int index, c, x, y;
  64         const qbyte *in, *inrow, *incolumn;
  65         if (inputflipdiagonal)
  66         {
  67                 for (x = 0;x < inputwidth;x++)
  68                 {
  69                         for (y = 0;y < inputheight;y++)
  70                         {
  71                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  72                                 for (c = 0;c < numoutputcomponents;c++)
  73                                 {
  74                                         index = outputinputcomponentindices[c];
  75                                         if (index & 0x80000000)
  76                                                 *outpixels++ = index;
  77                                         else
  78                                                 *outpixels++ = in[index];
  79                                 }
  80                         }
  81                 }
  82         }
  83         else
  84         {
  85                 for (y = 0;y < inputheight;y++)
  86                 {
  87                         for (x = 0;x < inputwidth;x++)
  88                         {
  89                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  90                                 for (c = 0;c < numoutputcomponents;c++)
  91                                 {
  92                                         index = outputinputcomponentindices[c];
  93                                         if (index & 0x80000000)
  94                                                 *outpixels++ = index;
  95                                         else
  96                                                 *outpixels++ = in[index];
  97                                 }
  98                         }
  99                 }
 100         }
 101 }
 102 #endif
 103
 104 void Image_GammaRemapRGB(const qbyte *in, qbyte *out, int pixels, const qbyte *gammar, const qbyte *gammag, const qbyte *gammab)
 105 {
 106         while (pixels--)
 107         {
 108                 out[0] = gammar[in[0]];
 109                 out[1] = gammag[in[1]];
 110                 out[2] = gammab[in[2]];
 111                 in += 3;
 112                 out += 3;
 113         }
 114 }
 115
 116 // note: pal must be 32bit color
 117 void Image_Copy8bitRGBA(const qbyte *in, qbyte *out, int pixels, const unsigned int *pal)
 118 {
 119         int *iout = (void *)out;
 120         while (pixels >= 8)
 121         {
 122                 iout[0] = pal[in[0]];
 123                 iout[1] = pal[in[1]];
 124                 iout[2] = pal[in[2]];
 125                 iout[3] = pal[in[3]];
 126                 iout[4] = pal[in[4]];
 127                 iout[5] = pal[in[5]];
 128                 iout[6] = pal[in[6]];
 129                 iout[7] = pal[in[7]];
 130                 in += 8;
 131                 iout += 8;
 132                 pixels -= 8;
 133         }
 134         if (pixels & 4)
 135         {
 136                 iout[0] = pal[in[0]];
 137                 iout[1] = pal[in[1]];
 138                 iout[2] = pal[in[2]];
 139                 iout[3] = pal[in[3]];
 140                 in += 4;
 141                 iout += 4;
 142         }
 143         if (pixels & 2)
 144         {
 145                 iout[0] = pal[in[0]];
 146                 iout[1] = pal[in[1]];
 147                 in += 2;
 148                 iout += 2;
 149         }
 150         if (pixels & 1)
 151                 iout[0] = pal[in[0]];
 152 }
 153
 154 /*
 155 =================================================================
 156
 157   PCX Loading
 158
 159 =================================================================
 160 */
 161
 162 typedef struct
 163 {
 164     char        manufacturer;
 165     char        version;
 166     char        encoding;
 167     char        bits_per_pixel;
 168     unsigned short      xmin,ymin,xmax,ymax;
 169     unsigned short      hres,vres;
 170     unsigned char       palette[48];
 171     char        reserved;
 172     char        color_planes;
 173     unsigned short      bytes_per_line;
 174     unsigned short      palette_type;
 175     char        filler[58];
 176 } pcx_t;
 177
 178 /*
 179 ============
 180 LoadPCX
 181 ============
 182 */
 183 qbyte* LoadPCX (qbyte *f, int matchwidth, int matchheight)
 184 {
 185         pcx_t pcx;
 186         qbyte *a, *b, *image_rgba, *pbuf;
 187         const qbyte *palette, *fin, *enddata;
 188         int x, y, x2, dataByte;
 189
 190         if (fs_filesize < (int)sizeof(pcx) + 768)
 191         {
 192                 Con_Print("Bad pcx file\n");
 193                 return NULL;
 194         }
 195
 196         fin = f;
 197
 198         memcpy(&pcx, fin, sizeof(pcx));
 199         fin += sizeof(pcx);
 200
 201         // LordHavoc: big-endian support ported from QF newtree
 202         pcx.xmax = LittleShort (pcx.xmax);
 203         pcx.xmin = LittleShort (pcx.xmin);
 204         pcx.ymax = LittleShort (pcx.ymax);
 205         pcx.ymin = LittleShort (pcx.ymin);
 206         pcx.hres = LittleShort (pcx.hres);
 207         pcx.vres = LittleShort (pcx.vres);
 208         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 209         pcx.palette_type = LittleShort (pcx.palette_type);
 210
 211         image_width = pcx.xmax + 1 - pcx.xmin;
 212         image_height = pcx.ymax + 1 - pcx.ymin;
 213         if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 214         {
 215                 Con_Print("Bad pcx file\n");
 216                 return NULL;
 217         }
 218         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 219                 return NULL;
 220
 221         palette = f + fs_filesize - 768;
 222
 223         image_rgba = Mem_Alloc(tempmempool, image_width*image_height*4);
 224         if (!image_rgba)
 225         {
 226                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 227                 return NULL;
 228         }
 229         pbuf = image_rgba + image_width*image_height*3;
 230         enddata = palette;
 231
 232         for (y = 0;y < image_height && fin < enddata;y++)
 233         {
 234                 a = pbuf + y * image_width;
 235                 for (x = 0;x < image_width && fin < enddata;)
 236                 {
 237                         dataByte = *fin++;
 238                         if(dataByte >= 0xC0)
 239                         {
 240                                 if (fin >= enddata)
 241                                         break;
 242                                 x2 = x + (dataByte & 0x3F);
 243                                 dataByte = *fin++;
 244                                 if (x2 > image_width)
 245                                         x2 = image_width; // technically an error
 246                                 while(x < x2)
 247                                         a[x++] = dataByte;
 248                         }
 249                         else
 250                                 a[x++] = dataByte;
 251                 }
 252                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
 253                 while(x < image_width)
 254                         a[x++] = 0;
 255         }
 256
 257         a = image_rgba;
 258         b = pbuf;
 259
 260         for(x = 0;x < image_width*image_height;x++)
 261         {
 262                 y = *b++ * 3;
 263                 *a++ = palette[y];
 264                 *a++ = palette[y+1];
 265                 *a++ = palette[y+2];
 266                 *a++ = 255;
 267         }
 268
 269         return image_rgba;
 270 }
 271
 272 /*
 273 =========================================================
 274
 275 TARGA LOADING
 276
 277 =========================================================
 278 */
 279
 280 typedef struct _TargaHeader
 281 {
 282         unsigned char   id_length, colormap_type, image_type;
 283         unsigned short  colormap_index, colormap_length;
 284         unsigned char   colormap_size;
 285         unsigned short  x_origin, y_origin, width, height;
 286         unsigned char   pixel_size, attributes;
 287 }
 288 TargaHeader;
 289
 290 void PrintTargaHeader(TargaHeader *t)
 291 {
 292         Con_Print("TargaHeader:\n");
 293         Con_Printf("uint8 id_length = %i;\n", t->id_length);
 294         Con_Printf("uint8 colormap_type = %i;\n", t->colormap_type);
 295         Con_Printf("uint8 image_type = %i;\n", t->image_type);
 296         Con_Printf("uint16 colormap_index = %i;\n", t->colormap_index);
 297         Con_Printf("uint16 colormap_length = %i;\n", t->colormap_length);
 298         Con_Printf("uint8 colormap_size = %i;\n", t->colormap_size);
 299         Con_Printf("uint16 x_origin = %i;\n", t->x_origin);
 300         Con_Printf("uint16 y_origin = %i;\n", t->y_origin);
 301         Con_Printf("uint16 width = %i;\n", t->width);
 302         Con_Printf("uint16 height = %i;\n", t->height);
 303         Con_Printf("uint8 pixel_size = %i;\n", t->pixel_size);
 304         Con_Printf("uint8 attributes = %i;\n", t->attributes);
 305 }
 306
 307 /*
 308 =============
 309 LoadTGA
 310 =============
 311 */
 312 qbyte *LoadTGA (qbyte *f, int matchwidth, int matchheight)
 313 {
 314         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex;
 315         qbyte *pixbuf, *image_rgba;
 316         qbyte *fin, *enddata;
 317         TargaHeader targa_header;
 318         unsigned char palette[256*4], *p;
 319
 320         if (fs_filesize < 19)
 321                 return NULL;
 322
 323         enddata = f + fs_filesize;
 324
 325         targa_header.id_length = f[0];
 326         targa_header.colormap_type = f[1];
 327         targa_header.image_type = f[2];
 328
 329         targa_header.colormap_index = f[3] + f[4] * 256;
 330         targa_header.colormap_length = f[5] + f[6] * 256;
 331         targa_header.colormap_size = f[7];
 332         targa_header.x_origin = f[8] + f[9] * 256;
 333         targa_header.y_origin = f[10] + f[11] * 256;
 334         targa_header.width = image_width = f[12] + f[13] * 256;
 335         targa_header.height = image_height = f[14] + f[15] * 256;
 336         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 337         {
 338                 Con_Print("LoadTGA: invalid size\n");
 339                 PrintTargaHeader(&targa_header);
 340                 return NULL;
 341         }
 342         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 343                 return NULL;
 344         targa_header.pixel_size = f[16];
 345         targa_header.attributes = f[17];
 346
 347         fin = f + 18;
 348         if (targa_header.id_length != 0)
 349                 fin += targa_header.id_length;  // skip TARGA image comment
 350         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 351         {
 352                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 353                 {
 354                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 355                         PrintTargaHeader(&targa_header);
 356                         return NULL;
 357                 }
 358         }
 359         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 360         {
 361                 if (targa_header.pixel_size != 8)
 362                 {
 363                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 364                         PrintTargaHeader(&targa_header);
 365                         return NULL;
 366                 }
 367                 if (targa_header.colormap_length > 256)
 368                 {
 369                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 370                         PrintTargaHeader(&targa_header);
 371                         return NULL;
 372                 }
 373                 if (targa_header.colormap_index)
 374                 {
 375                         Con_Print("LoadTGA: colormap_index not supported\n");
 376                         PrintTargaHeader(&targa_header);
 377                         return NULL;
 378                 }
 379                 if (targa_header.colormap_size == 24)
 380                 {
 381                         for (x = 0;x < targa_header.colormap_length;x++)
 382                         {
 383                                 palette[x*4+2] = *fin++;
 384                                 palette[x*4+1] = *fin++;
 385                                 palette[x*4+0] = *fin++;
 386                                 palette[x*4+3] = 255;
 387                         }
 388                 }
 389                 else if (targa_header.colormap_size == 32)
 390                 {
 391                         for (x = 0;x < targa_header.colormap_length;x++)
 392                         {
 393                                 palette[x*4+2] = *fin++;
 394                                 palette[x*4+1] = *fin++;
 395                                 palette[x*4+0] = *fin++;
 396                                 palette[x*4+3] = *fin++;
 397                         }
 398                 }
 399                 else
 400                 {
 401                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 402                         PrintTargaHeader(&targa_header);
 403                         return NULL;
 404                 }
 405         }
 406         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
 407         {
 408                 if (targa_header.pixel_size != 8)
 409                 {
 410                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 411                         PrintTargaHeader(&targa_header);
 412                         return NULL;
 413                 }
 414         }
 415         else
 416         {
 417                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 418                 PrintTargaHeader(&targa_header);
 419                 return NULL;
 420         }
 421
 422         if (targa_header.attributes & 0x10)
 423         {
 424                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 425                 return NULL;
 426         }
 427
 428         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 429         if (!image_rgba)
 430         {
 431                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 432                 return NULL;
 433         }
 434
 435         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 436         if ((targa_header.attributes & 0x20) == 0)
 437         {
 438                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 439                 row_inc = -image_width*4*2;
 440         }
 441         else
 442         {
 443                 pixbuf = image_rgba;
 444                 row_inc = 0;
 445         }
 446
 447         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 448         x = 0;
 449         y = 0;
 450         red = green = blue = alpha = 255;
 451         while (y < image_height)
 452         {
 453                 // decoder is mostly the same whether it's compressed or not
 454                 readpixelcount = 1000000;
 455                 runlen = 1000000;
 456                 if (compressed && fin < enddata)
 457                 {
 458                         runlen = *fin++;
 459                         // high bit indicates this is an RLE compressed run
 460                         if (runlen & 0x80)
 461                                 readpixelcount = 1;
 462                         runlen = 1 + (runlen & 0x7f);
 463                 }
 464
 465                 while((runlen--) && y < image_height)
 466                 {
 467                         if (readpixelcount > 0)
 468                         {
 469                                 readpixelcount--;
 470                                 red = green = blue = alpha = 255;
 471                                 if (fin < enddata)
 472                                 {
 473                                         switch(targa_header.image_type)
 474                                         {
 475                                         case 1:
 476                                         case 9:
 477                                                 // colormapped
 478                                                 pindex = *fin++;
 479                                                 if (pindex >= targa_header.colormap_length)
 480                                                         pindex = 0; // error
 481                                                 p = palette + pindex * 4;
 482                                                 red = p[0];
 483                                                 green = p[1];
 484                                                 blue = p[2];
 485                                                 alpha = p[3];
 486                                                 break;
 487                                         case 2:
 488                                         case 10:
 489                                                 // BGR or BGRA
 490                                                 blue = *fin++;
 491                                                 if (fin < enddata)
 492                                                         green = *fin++;
 493                                                 if (fin < enddata)
 494                                                         red = *fin++;
 495                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 496                                                         alpha = *fin++;
 497                                                 break;
 498                                         case 3:
 499                                         case 11:
 500                                                 // greyscale
 501                                                 red = green = blue = *fin++;
 502                                                 break;
 503                                         }
 504                                 }
 505                         }
 506                         *pixbuf++ = red;
 507                         *pixbuf++ = green;
 508                         *pixbuf++ = blue;
 509                         *pixbuf++ = alpha;
 510                         x++;
 511                         if (x == image_width)
 512                         {
 513                                 // end of line, advance to next
 514                                 x = 0;
 515                                 y++;
 516                                 pixbuf += row_inc;
 517                         }
 518                 }
 519         }
 520
 521         return image_rgba;
 522 }
 523
 524 /*
 525 ============
 526 LoadLMP
 527 ============
 528 */
 529 qbyte *LoadLMP (qbyte *f, int matchwidth, int matchheight)
 530 {
 531         qbyte *image_rgba;
 532
 533         if (fs_filesize < 9)
 534         {
 535                 Con_Print("LoadLMP: invalid LMP file\n");
 536                 return NULL;
 537         }
 538
 539         // parse the very complicated header *chuckle*
 540         image_width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
 541         image_height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
 542         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 543         {
 544                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 545                 return NULL;
 546         }
 547         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 548                 return NULL;
 549
 550         if (fs_filesize < 8 + image_width * image_height)
 551         {
 552                 Con_Print("LoadLMP: invalid LMP file\n");
 553                 return NULL;
 554         }
 555
 556         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 557         if (!image_rgba)
 558         {
 559                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 560                 return NULL;
 561         }
 562         Image_Copy8bitRGBA(f + 8, image_rgba, image_width * image_height, palette_complete);
 563         return image_rgba;
 564 }
 565
 566 typedef struct
 567 {
 568         char            name[32];
 569         unsigned        width, height;
 570         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 571         char            animname[32];                   // next frame in animation chain
 572         int                     flags;
 573         int                     contents;
 574         int                     value;
 575 } q2wal_t;
 576
 577 qbyte *LoadWAL (qbyte *f, int matchwidth, int matchheight)
 578 {
 579         qbyte *image_rgba;
 580         const q2wal_t *inwal = (const void *)f;
 581
 582         if (fs_filesize < (int) sizeof(q2wal_t))
 583         {
 584                 Con_Print("LoadWAL: invalid WAL file\n");
 585                 return NULL;
 586         }
 587
 588         image_width = LittleLong(inwal->width);
 589         image_height = LittleLong(inwal->height);
 590         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 591         {
 592                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 593                 return NULL;
 594         }
 595         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 596                 return NULL;
 597
 598         if ((int) fs_filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 599         {
 600                 Con_Print("LoadWAL: invalid WAL file\n");
 601                 return NULL;
 602         }
 603
 604         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 605         if (!image_rgba)
 606         {
 607                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 608                 return NULL;
 609         }
 610         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 611         return image_rgba;
 612 }
 613
 614
 615
 616 /*
 617 ============
 618 LoadLMP
 619 ============
 620 */
 621 qbyte *LoadLMPAs8Bit (qbyte *f, int matchwidth, int matchheight)
 622 {
 623         qbyte *image_8bit;
 624
 625         if (fs_filesize < 9)
 626         {
 627                 Con_Print("LoadLMPAs8Bit: invalid LMP file\n");
 628                 return NULL;
 629         }
 630
 631         // parse the very complicated header *chuckle*
 632         image_width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
 633         image_height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
 634         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 635         {
 636                 Con_Printf("LoadLMPAs8Bit: invalid size %ix%i\n", image_width, image_height);
 637                 return NULL;
 638         }
 639         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 640                 return NULL;
 641
 642         if (fs_filesize < 8 + image_width * image_height)
 643         {
 644                 Con_Print("LoadLMPAs8Bit: invalid LMP file\n");
 645                 return NULL;
 646         }
 647
 648         image_8bit = Mem_Alloc(tempmempool, image_width * image_height);
 649         if (!image_8bit)
 650         {
 651                 Con_Printf("LoadLMPAs8Bit: not enough memory for %i by %i image\n", image_width, image_height);
 652                 return NULL;
 653         }
 654         memcpy(image_8bit, f + 8, image_width * image_height);
 655         return image_8bit;
 656 }
 657
 658 void Image_StripImageExtension (const char *in, char *out)
 659 {
 660         const char *end, *temp;
 661         end = in + strlen(in);
 662         if ((end - in) >= 4)
 663         {
 664                 temp = end - 4;
 665                 if (strcmp(temp, ".tga") == 0
 666                  || strcmp(temp, ".pcx") == 0
 667                  || strcmp(temp, ".lmp") == 0
 668                  || strcmp(temp, ".png") == 0
 669                  || strcmp(temp, ".jpg") == 0)
 670                         end = temp;
 671                 while (in < end)
 672                         *out++ = *in++;
 673                 *out++ = 0;
 674         }
 675         else
 676                 strcpy(out, in);
 677 }
 678
 679 struct
 680 {
 681         const char *formatstring;
 682         qbyte *(*loadfunc)(qbyte *f, int matchwidth, int matchheight);
 683 }
 684 imageformats[] =
 685 {
 686         {"override/%s.tga", LoadTGA},
 687         {"override/%s.jpg", JPEG_LoadImage},
 688         {"textures/%s.tga", LoadTGA},
 689         {"textures/%s.jpg", JPEG_LoadImage},
 690         {"textures/%s.pcx", LoadPCX},
 691         {"textures/%s.wal", LoadWAL},
 692         {"%s.tga", LoadTGA},
 693         {"%s.jpg", JPEG_LoadImage},
 694         {"%s.pcx", LoadPCX},
 695         {"%s.lmp", LoadLMP},
 696         {NULL, NULL}
 697 };
 698
 699 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 700 {
 701         int i;
 702         qbyte *f, *data = NULL;
 703         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 704         if (developer_memorydebug.integer)
 705                 Mem_CheckSentinelsGlobal();
 706         Image_StripImageExtension(filename, basename); // strip filename extensions to allow replacement by other types
 707         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 708         for (c = basename;*c;c++)
 709                 if (*c == '*')
 710                         *c = '#';
 711         for (i = 0;imageformats[i].formatstring;i++)
 712         {
 713                 sprintf (name, imageformats[i].formatstring, basename);
 714                 f = FS_LoadFile(name, tempmempool, true);
 715                 if (f)
 716                 {
 717                         data = imageformats[i].loadfunc(f, matchwidth, matchheight);
 718                         Mem_Free(f);
 719                         if (data)
 720                         {
 721                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 722                                 if (developer_memorydebug.integer)
 723                                         Mem_CheckSentinelsGlobal();
 724                                 return data;
 725                         }
 726                 }
 727         }
 728         if (complain)
 729         {
 730                 Con_Printf("Couldn't load %s using ", filename);
 731                 for (i = 0;imageformats[i].formatstring;i++)
 732                 {
 733                         sprintf (name, imageformats[i].formatstring, basename);
 734                         Con_Printf(i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
 735                 }
 736         }
 737         if (developer_memorydebug.integer)
 738                 Mem_CheckSentinelsGlobal();
 739         return NULL;
 740 }
 741
 742 int image_makemask (const qbyte *in, qbyte *out, int size)
 743 {
 744         int i, count;
 745         count = 0;
 746         for (i = 0;i < size;i++)
 747         {
 748                 out[0] = out[1] = out[2] = 255;
 749                 out[3] = in[3];
 750                 if (in[3] != 255)
 751                         count++;
 752                 in += 4;
 753                 out += 4;
 754         }
 755         return count;
 756 }
 757
 758 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 759 {
 760         qbyte *in, *data;
 761         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 762         if (!data)
 763                 return NULL;
 764         if (image_makemask(data, data, image_width * image_height))
 765                 return data; // some transparency
 766         else
 767         {
 768                 Mem_Free(data);
 769                 return NULL; // all opaque
 770         }
 771 }
 772
 773 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 774 {
 775         qbyte *data;
 776         rtexture_t *rt;
 777         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 778                 return 0;
 779         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 780         Mem_Free(data);
 781         return rt;
 782 }
 783
 784 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 785 {
 786         qbyte *data;
 787         rtexture_t *rt;
 788         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
 789                 return 0;
 790         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 791         Mem_Free(data);
 792         return rt;
 793 }
 794
 795 rtexture_t *image_masktex;
 796 rtexture_t *image_nmaptex;
 797 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 798 {
 799         qbyte *data;
 800         rtexture_t *rt;
 801         image_masktex = NULL;
 802         image_nmaptex = NULL;
 803         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 804                 return 0;
 805
 806         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 807
 808         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 809                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 810
 811         Mem_Free(data);
 812         return rt;
 813 }
 814
 815 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 816 {
 817         qbyte *data, *data2;
 818         rtexture_t *rt;
 819         image_masktex = NULL;
 820         image_nmaptex = NULL;
 821         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 822                 return 0;
 823
 824         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 825
 826         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 827
 828         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 829         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 830
 831         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 832                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 833
 834         Mem_Free(data2);
 835
 836         Mem_Free(data);
 837         return rt;
 838 }
 839
 840 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 841 {
 842         qbyte *data, *data2;
 843         rtexture_t *rt;
 844         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 845                 return 0;
 846         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 847
 848         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 849         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 850
 851         Mem_Free(data2);
 852         Mem_Free(data);
 853         return rt;
 854 }
 855
 856 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data)
 857 {
 858         qboolean ret;
 859         qbyte *buffer, *out;
 860         const qbyte *in, *end;
 861
 862         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 863
 864         memset (buffer, 0, 18);
 865         buffer[2] = 2;          // uncompressed type
 866         buffer[12] = (width >> 0) & 0xFF;
 867         buffer[13] = (width >> 8) & 0xFF;
 868         buffer[14] = (height >> 0) & 0xFF;
 869         buffer[15] = (height >> 8) & 0xFF;
 870         buffer[16] = 24;        // pixel size
 871
 872         // swap rgb to bgr
 873         in = data;
 874         out = buffer + 18;
 875         end = in + width*height*3;
 876         for (;in < end;in += 3)
 877         {
 878                 *out++ = in[2];
 879                 *out++ = in[1];
 880                 *out++ = in[0];
 881         }
 882         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 883
 884         Mem_Free(buffer);
 885         return ret;
 886 }
 887
 888 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
 889 {
 890         int y;
 891         qbyte *buffer, *out;
 892         const qbyte *in, *end;
 893
 894         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 895
 896         memset (buffer, 0, 18);
 897         buffer[2] = 2;          // uncompressed type
 898         buffer[12] = (width >> 0) & 0xFF;
 899         buffer[13] = (width >> 8) & 0xFF;
 900         buffer[14] = (height >> 0) & 0xFF;
 901         buffer[15] = (height >> 8) & 0xFF;
 902         buffer[16] = 24;        // pixel size
 903
 904         // swap rgb to bgr and flip upside down
 905         out = buffer + 18;
 906         for (y = height - 1;y >= 0;y--)
 907         {
 908                 in = data + y * width * 3;
 909                 end = in + width * 3;
 910                 for (;in < end;in += 3)
 911                 {
 912                         *out++ = in[2];
 913                         *out++ = in[1];
 914                         *out++ = in[0];
 915                 }
 916         }
 917         FS_WriteFile (filename, buffer, width*height*3 + 18 );
 918
 919         Mem_Free(buffer);
 920 }
 921
 922 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
 923 {
 924         int y;
 925         qbyte *buffer, *out;
 926         const qbyte *in, *end;
 927
 928         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
 929
 930         memset (buffer, 0, 18);
 931         buffer[2] = 2;          // uncompressed type
 932         buffer[12] = (width >> 0) & 0xFF;
 933         buffer[13] = (width >> 8) & 0xFF;
 934         buffer[14] = (height >> 0) & 0xFF;
 935         buffer[15] = (height >> 8) & 0xFF;
 936         buffer[16] = 32;        // pixel size
 937
 938         // swap rgba to bgra and flip upside down
 939         out = buffer + 18;
 940         for (y = height - 1;y >= 0;y--)
 941         {
 942                 in = data + y * width * 4;
 943                 end = in + width * 4;
 944                 for (;in < end;in += 4)
 945                 {
 946                         *out++ = in[2];
 947                         *out++ = in[1];
 948                         *out++ = in[0];
 949                         *out++ = in[3];
 950                 }
 951         }
 952         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 953
 954         Mem_Free(buffer);
 955 }
 956
 957 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
 958 {
 959         const qbyte *end;
 960         if (rgba)
 961         {
 962                 // check alpha bytes
 963                 for (end = data + size * 4, data += 3;data < end;data += 4)
 964                         if (*data < 255)
 965                                 return 1;
 966         }
 967         else
 968         {
 969                 // color 255 is transparent
 970                 for (end = data + size;data < end;data++)
 971                         if (*data == 255)
 972                                 return 1;
 973         }
 974         return 0;
 975 }
 976
 977 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 978 {
 979         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 980         fstep = (int) (inwidth*65536.0f/outwidth);
 981         endx = (inwidth-1);
 982         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 983         {
 984                 xi = f >> 16;
 985                 if (xi != oldx)
 986                 {
 987                         in += (xi - oldx) * 4;
 988                         oldx = xi;
 989                 }
 990                 if (xi < endx)
 991                 {
 992                         lerp = f & 0xFFFF;
 993                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 994                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 995                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 996                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 997                 }
 998                 else // last pixel of the line has no pixel to lerp to
 999                 {
1000                         *out++ = in[0];
1001                         *out++ = in[1];
1002                         *out++ = in[2];
1003                         *out++ = in[3];
1004                 }
1005         }
1006 }
1007
1008 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
1009 {
1010         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1011         fstep = (int) (inwidth*65536.0f/outwidth);
1012         endx = (inwidth-1);
1013         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1014         {
1015                 xi = f >> 16;
1016                 if (xi != oldx)
1017                 {
1018                         in += (xi - oldx) * 3;
1019                         oldx = xi;
1020                 }
1021                 if (xi < endx)
1022                 {
1023                         lerp = f & 0xFFFF;
1024                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1025                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1026                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1027                 }
1028                 else // last pixel of the line has no pixel to lerp to
1029                 {
1030                         *out++ = in[0];
1031                         *out++ = in[1];
1032                         *out++ = in[2];
1033                 }
1034         }
1035 }
1036
1037 int resamplerowsize = 0;
1038 qbyte *resamplerow1 = NULL;
1039 qbyte *resamplerow2 = NULL;
1040 mempool_t *resamplemempool = NULL;
1041
1042 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1043 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1044 {
1045         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1046         qbyte *out;
1047         const qbyte *inrow;
1048         out = outdata;
1049         fstep = (int) (inheight*65536.0f/outheight);
1050
1051         inrow = indata;
1052         oldy = 0;
1053         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1054         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1055         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1056         {
1057                 yi = f >> 16;
1058                 if (yi < endy)
1059                 {
1060                         lerp = f & 0xFFFF;
1061                         if (yi != oldy)
1062                         {
1063                                 inrow = (qbyte *)indata + inwidth4*yi;
1064                                 if (yi == oldy+1)
1065                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1066                                 else
1067                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1068                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1069                                 oldy = yi;
1070                         }
1071                         j = outwidth - 4;
1072                         while(j >= 0)
1073                         {
1074                                 LERPBYTE( 0);
1075                                 LERPBYTE( 1);
1076                                 LERPBYTE( 2);
1077                                 LERPBYTE( 3);
1078                                 LERPBYTE( 4);
1079                                 LERPBYTE( 5);
1080                                 LERPBYTE( 6);
1081                                 LERPBYTE( 7);
1082                                 LERPBYTE( 8);
1083                                 LERPBYTE( 9);
1084                                 LERPBYTE(10);
1085                                 LERPBYTE(11);
1086                                 LERPBYTE(12);
1087                                 LERPBYTE(13);
1088                                 LERPBYTE(14);
1089                                 LERPBYTE(15);
1090                                 out += 16;
1091                                 resamplerow1 += 16;
1092                                 resamplerow2 += 16;
1093                                 j -= 4;
1094                         }
1095                         if (j & 2)
1096                         {
1097                                 LERPBYTE( 0);
1098                                 LERPBYTE( 1);
1099                                 LERPBYTE( 2);
1100                                 LERPBYTE( 3);
1101                                 LERPBYTE( 4);
1102                                 LERPBYTE( 5);
1103                                 LERPBYTE( 6);
1104                                 LERPBYTE( 7);
1105                                 out += 8;
1106                                 resamplerow1 += 8;
1107                                 resamplerow2 += 8;
1108                         }
1109                         if (j & 1)
1110                         {
1111                                 LERPBYTE( 0);
1112                                 LERPBYTE( 1);
1113                                 LERPBYTE( 2);
1114                                 LERPBYTE( 3);
1115                                 out += 4;
1116                                 resamplerow1 += 4;
1117                                 resamplerow2 += 4;
1118                         }
1119                         resamplerow1 -= outwidth4;
1120                         resamplerow2 -= outwidth4;
1121                 }
1122                 else
1123                 {
1124                         if (yi != oldy)
1125                         {
1126                                 inrow = (qbyte *)indata + inwidth4*yi;
1127                                 if (yi == oldy+1)
1128                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1129                                 else
1130                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1131                                 oldy = yi;
1132                         }
1133                         memcpy(out, resamplerow1, outwidth4);
1134                 }
1135         }
1136 }
1137
1138 void Image_Resample32Nearest(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1139 {
1140         int i, j;
1141         unsigned frac, fracstep;
1142         // relies on int being 4 bytes
1143         int *inrow, *out;
1144         out = outdata;
1145
1146         fracstep = inwidth*0x10000/outwidth;
1147         for (i = 0;i < outheight;i++)
1148         {
1149                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1150                 frac = fracstep >> 1;
1151                 j = outwidth - 4;
1152                 while (j >= 0)
1153                 {
1154                         out[0] = inrow[frac >> 16];frac += fracstep;
1155                         out[1] = inrow[frac >> 16];frac += fracstep;
1156                         out[2] = inrow[frac >> 16];frac += fracstep;
1157                         out[3] = inrow[frac >> 16];frac += fracstep;
1158                         out += 4;
1159                         j -= 4;
1160                 }
1161                 if (j & 2)
1162                 {
1163                         out[0] = inrow[frac >> 16];frac += fracstep;
1164                         out[1] = inrow[frac >> 16];frac += fracstep;
1165                         out += 2;
1166                 }
1167                 if (j & 1)
1168                 {
1169                         out[0] = inrow[frac >> 16];frac += fracstep;
1170                         out += 1;
1171                 }
1172         }
1173 }
1174
1175 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1176 {
1177         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1178         qbyte *out;
1179         const qbyte *inrow;
1180         out = outdata;
1181         fstep = (int) (inheight*65536.0f/outheight);
1182
1183         inrow = indata;
1184         oldy = 0;
1185         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1186         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1187         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1188         {
1189                 yi = f >> 16;
1190                 if (yi < endy)
1191                 {
1192                         lerp = f & 0xFFFF;
1193                         if (yi != oldy)
1194                         {
1195                                 inrow = (qbyte *)indata + inwidth3*yi;
1196                                 if (yi == oldy+1)
1197                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1198                                 else
1199                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1200                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1201                                 oldy = yi;
1202                         }
1203                         j = outwidth - 4;
1204                         while(j >= 0)
1205                         {
1206                                 LERPBYTE( 0);
1207                                 LERPBYTE( 1);
1208                                 LERPBYTE( 2);
1209                                 LERPBYTE( 3);
1210                                 LERPBYTE( 4);
1211                                 LERPBYTE( 5);
1212                                 LERPBYTE( 6);
1213                                 LERPBYTE( 7);
1214                                 LERPBYTE( 8);
1215                                 LERPBYTE( 9);
1216                                 LERPBYTE(10);
1217                                 LERPBYTE(11);
1218                                 out += 12;
1219                                 resamplerow1 += 12;
1220                                 resamplerow2 += 12;
1221                                 j -= 4;
1222                         }
1223                         if (j & 2)
1224                         {
1225                                 LERPBYTE( 0);
1226                                 LERPBYTE( 1);
1227                                 LERPBYTE( 2);
1228                                 LERPBYTE( 3);
1229                                 LERPBYTE( 4);
1230                                 LERPBYTE( 5);
1231                                 out += 6;
1232                                 resamplerow1 += 6;
1233                                 resamplerow2 += 6;
1234                         }
1235                         if (j & 1)
1236                         {
1237                                 LERPBYTE( 0);
1238                                 LERPBYTE( 1);
1239                                 LERPBYTE( 2);
1240                                 out += 3;
1241                                 resamplerow1 += 3;
1242                                 resamplerow2 += 3;
1243                         }
1244                         resamplerow1 -= outwidth3;
1245                         resamplerow2 -= outwidth3;
1246                 }
1247                 else
1248                 {
1249                         if (yi != oldy)
1250                         {
1251                                 inrow = (qbyte *)indata + inwidth3*yi;
1252                                 if (yi == oldy+1)
1253                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1254                                 else
1255                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1256                                 oldy = yi;
1257                         }
1258                         memcpy(out, resamplerow1, outwidth3);
1259                 }
1260         }
1261 }
1262
1263 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1264 {
1265         int i, j, f, inwidth3 = inwidth * 3;
1266         unsigned frac, fracstep;
1267         qbyte *inrow, *out;
1268         out = outdata;
1269
1270         fracstep = inwidth*0x10000/outwidth;
1271         for (i = 0;i < outheight;i++)
1272         {
1273                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1274                 frac = fracstep >> 1;
1275                 j = outwidth - 4;
1276                 while (j >= 0)
1277                 {
1278                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1279                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1280                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1281                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1282                         j -= 4;
1283                 }
1284                 if (j & 2)
1285                 {
1286                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1287                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1288                         out += 2;
1289                 }
1290                 if (j & 1)
1291                 {
1292                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1293                         out += 1;
1294                 }
1295         }
1296 }
1297
1298 /*
1299 ================
1300 Image_Resample
1301 ================
1302 */
1303 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1304 {
1305         if (indepth != 1 || outdepth != 1)
1306                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1307         if (resamplerowsize < outwidth*4)
1308         {
1309                 if (resamplerow1)
1310                         Mem_Free(resamplerow1);
1311                 resamplerowsize = outwidth*4;
1312                 if (!resamplemempool)
1313                         resamplemempool = Mem_AllocPool("Image Scaling Buffer");
1314                 resamplerow1 = Mem_Alloc(resamplemempool, resamplerowsize*2);
1315                 resamplerow2 = resamplerow1 + resamplerowsize;
1316         }
1317         if (bytesperpixel == 4)
1318         {
1319                 if (quality)
1320                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1321                 else
1322                         Image_Resample32Nearest(indata, inwidth, inheight, outdata, outwidth, outheight);
1323         }
1324         else if (bytesperpixel == 3)
1325         {
1326                 if (quality)
1327                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1328                 else
1329                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1330         }
1331         else
1332                 Sys_Error("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1333 }
1334
1335 // in can be the same as out
1336 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1337 {
1338         int x, y, nextrow;
1339         if (*depth != 1 || destdepth != 1)
1340                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1341         nextrow = *width * bytesperpixel;
1342         if (*width > destwidth)
1343         {
1344                 *width >>= 1;
1345                 if (*height > destheight)
1346                 {
1347                         // reduce both
1348                         *height >>= 1;
1349                         if (bytesperpixel == 4)
1350                         {
1351                                 for (y = 0;y < *height;y++)
1352                                 {
1353                                         for (x = 0;x < *width;x++)
1354                                         {
1355                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1356                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1357                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1358                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1359                                                 out += 4;
1360                                                 in += 8;
1361                                         }
1362                                         in += nextrow; // skip a line
1363                                 }
1364                         }
1365                         else if (bytesperpixel == 3)
1366                         {
1367                                 for (y = 0;y < *height;y++)
1368                                 {
1369                                         for (x = 0;x < *width;x++)
1370                                         {
1371                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1372                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1373                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1374                                                 out += 3;
1375                                                 in += 6;
1376                                         }
1377                                         in += nextrow; // skip a line
1378                                 }
1379                         }
1380                         else
1381                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1382                 }
1383                 else
1384                 {
1385                         // reduce width
1386                         if (bytesperpixel == 4)
1387                         {
1388                                 for (y = 0;y < *height;y++)
1389                                 {
1390                                         for (x = 0;x < *width;x++)
1391                                         {
1392                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1393                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1394                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1395                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1396                                                 out += 4;
1397                                                 in += 8;
1398                                         }
1399                                 }
1400                         }
1401                         else if (bytesperpixel == 3)
1402                         {
1403                                 for (y = 0;y < *height;y++)
1404                                 {
1405                                         for (x = 0;x < *width;x++)
1406                                         {
1407                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1408                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1409                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1410                                                 out += 3;
1411                                                 in += 6;
1412                                         }
1413                                 }
1414                         }
1415                         else
1416                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1417                 }
1418         }
1419         else
1420         {
1421                 if (*height > destheight)
1422                 {
1423                         // reduce height
1424                         *height >>= 1;
1425                         if (bytesperpixel == 4)
1426                         {
1427                                 for (y = 0;y < *height;y++)
1428                                 {
1429                                         for (x = 0;x < *width;x++)
1430                                         {
1431                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1432                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1433                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1434                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1435                                                 out += 4;
1436                                                 in += 4;
1437                                         }
1438                                         in += nextrow; // skip a line
1439                                 }
1440                         }
1441                         else if (bytesperpixel == 3)
1442                         {
1443                                 for (y = 0;y < *height;y++)
1444                                 {
1445                                         for (x = 0;x < *width;x++)
1446                                         {
1447                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1448                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1449                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1450                                                 out += 3;
1451                                                 in += 3;
1452                                         }
1453                                         in += nextrow; // skip a line
1454                                 }
1455                         }
1456                         else
1457                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1458                 }
1459                 else
1460                         Sys_Error("Image_MipReduce: desired size already achieved\n");
1461         }
1462 }
1463
1464 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1465 {
1466         int x, y;
1467         const unsigned char *p0, *p1, *p2;
1468         unsigned char *out;
1469         float iwidth, iheight, ibumpscale, n[3];
1470         iwidth = 1.0f / width;
1471         iheight = 1.0f / height;
1472         ibumpscale = (255.0f * 3.0f) / bumpscale;
1473         out = outpixels;
1474         for (y = 0;y < height;y++)
1475         {
1476                 for (x = 0;x < width;x++)
1477                 {
1478                         p0 = inpixels + (y * width + x) * 4;
1479                         if (x == width - 1)
1480                         {
1481                                 if (clamp)
1482                                         p1 = inpixels + (y * width + x) * 4;
1483                                 else
1484                                         p1 = inpixels + (y * width) * 4;
1485                         }
1486                         else
1487                                 p1 = inpixels + (y * width + x + 1) * 4;
1488                         if (y == height - 1)
1489                         {
1490                                 if (clamp)
1491                                         p2 = inpixels + (y * width + x) * 4;
1492                                 else
1493                                         p2 = inpixels + x * 4;
1494                         }
1495                         else
1496                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1497                         /*
1498                         dv[0][0] = iwidth;
1499                         dv[0][1] = 0;
1500                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1501                         dv[1][0] = 0;
1502                         dv[1][1] = iheight;
1503                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1504                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1505                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1506                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1507                         */
1508                         n[0] = ((p1[0] + p1[1] + p1[2]) - (p0[0] + p0[1] + p0[2]));
1509                         n[1] = ((p0[0] + p0[1] + p0[2]) - (p2[0] + p2[1] + p2[2]));
1510                         n[2] = ibumpscale;
1511                         VectorNormalize(n);
1512                         /*
1513                         // this should work for the bottom right triangle if anyone wants
1514                         // code for that for some reason
1515                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1516                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1517                         n[2] = ibumpscale;
1518                         VectorNormalize(n);
1519                         */
1520                         out[0] = 128.0f + n[0] * 127.0f;
1521                         out[1] = 128.0f + n[1] * 127.0f;
1522                         out[2] = 128.0f + n[2] * 127.0f;
1523                         out[3] = 255;
1524                         out += 4;
1525                 }
1526         }
1527 }
1528
1529 int image_loadskin(imageskin_t *s, char *shadername)
1530 {
1531         int j;
1532         qbyte *bumppixels;
1533         int bumppixels_width, bumppixels_height;
1534         char name[MAX_QPATH];
1535         Image_StripImageExtension(shadername, name);
1536         memset(s, 0, sizeof(*s));
1537         s->basepixels = loadimagepixels(name, false, 0, 0);
1538         if (s->basepixels == NULL)
1539                 return false;
1540         s->basepixels_width = image_width;
1541         s->basepixels_height = image_height;
1542
1543         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1544         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1545         {
1546                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1547                 s->maskpixels_width = s->basepixels_width;
1548                 s->maskpixels_height = s->basepixels_height;
1549                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1550                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1551                 {
1552                         s->maskpixels[j+0] = 255;
1553                         s->maskpixels[j+1] = 255;
1554                         s->maskpixels[j+2] = 255;
1555                 }
1556         }
1557
1558         // _luma is supported for tenebrae compatibility
1559         // (I think it's a very stupid name, but oh well)
1560         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1561          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1562         {
1563                 s->glowpixels_width = image_width;
1564                 s->glowpixels_height = image_height;
1565         }
1566         // _norm is the name used by tenebrae
1567         // (I don't like the name much)
1568         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1569         {
1570                 s->nmappixels_width = image_width;
1571                 s->nmappixels_height = image_height;
1572         }
1573         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1574         {
1575                 bumppixels_width = image_width;
1576                 bumppixels_height = image_height;
1577         }
1578         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1579         {
1580                 s->glosspixels_width = image_width;
1581                 s->glosspixels_height = image_height;
1582         }
1583         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1584         {
1585                 s->pantspixels_width = image_width;
1586                 s->pantspixels_height = image_height;
1587         }
1588         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1589         {
1590                 s->shirtpixels_width = image_width;
1591                 s->shirtpixels_height = image_height;
1592         }
1593
1594         if (s->nmappixels == NULL)
1595         {
1596                 if (bumppixels != NULL)
1597                 {
1598                         if (r_shadow_bumpscale_bumpmap.value > 0)
1599                         {
1600                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1601                                 s->nmappixels_width = bumppixels_width;
1602                                 s->nmappixels_height = bumppixels_height;
1603                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1604                         }
1605                 }
1606                 else
1607                 {
1608                         if (r_shadow_bumpscale_basetexture.value > 0)
1609                         {
1610                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1611                                 s->nmappixels_width = s->basepixels_width;
1612                                 s->nmappixels_height = s->basepixels_height;
1613                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1614                         }
1615                 }
1616         }
1617         if (bumppixels != NULL)
1618                 Mem_Free(bumppixels);
1619         return true;
1620 }
1621
1622 void image_freeskin(imageskin_t *s)
1623 {
1624         if (s->basepixels)
1625                 Mem_Free(s->basepixels);
1626         if (s->maskpixels)
1627                 Mem_Free(s->maskpixels);
1628         if (s->nmappixels)
1629                 Mem_Free(s->nmappixels);
1630         if (s->glowpixels)
1631                 Mem_Free(s->glowpixels);
1632         if (s->glosspixels)
1633                 Mem_Free(s->glosspixels);
1634         if (s->pantspixels)
1635                 Mem_Free(s->pantspixels);
1636         if (s->shirtpixels)
1637                 Mem_Free(s->shirtpixels);
1638         memset(s, 0, sizeof(*s));
1639 }
1640