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 (const 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_Printf("TargaHeader:\nuint8 id_length = %i;\nuint8 colormap_type = %i;\nuint8 image_type = %i;\nuint16 colormap_index = %i;\nuint16 colormap_length = %i;\nuint8 colormap_size = %i;\nuint16 x_origin = %i;\nuint16 y_origin = %i;\nuint16 width = %i;\nuint16 height = %i;\nuint8 pixel_size = %i;\nuint8 attributes = %i;\n", t->id_length, t->colormap_type, t->image_type, t->colormap_index, t->colormap_length, t->colormap_size, t->x_origin, t->y_origin, t->width, t->height, t->pixel_size, t->attributes);
 293 }
 294
 295 /*
 296 =============
 297 LoadTGA
 298 =============
 299 */
 300 qbyte *LoadTGA (const qbyte *f, int matchwidth, int matchheight)
 301 {
 302         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex, alphabits;
 303         qbyte *pixbuf, *image_rgba;
 304         const qbyte *fin, *enddata;
 305         unsigned char *p;
 306         TargaHeader targa_header;
 307         unsigned char palette[256*4];
 308
 309         if (fs_filesize < 19)
 310                 return NULL;
 311
 312         enddata = f + fs_filesize;
 313
 314         targa_header.id_length = f[0];
 315         targa_header.colormap_type = f[1];
 316         targa_header.image_type = f[2];
 317
 318         targa_header.colormap_index = f[3] + f[4] * 256;
 319         targa_header.colormap_length = f[5] + f[6] * 256;
 320         targa_header.colormap_size = f[7];
 321         targa_header.x_origin = f[8] + f[9] * 256;
 322         targa_header.y_origin = f[10] + f[11] * 256;
 323         targa_header.width = image_width = f[12] + f[13] * 256;
 324         targa_header.height = image_height = f[14] + f[15] * 256;
 325         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 326         {
 327                 Con_Print("LoadTGA: invalid size\n");
 328                 PrintTargaHeader(&targa_header);
 329                 return NULL;
 330         }
 331         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 332                 return NULL;
 333         targa_header.pixel_size = f[16];
 334         targa_header.attributes = f[17];
 335
 336         // advance to end of header
 337         fin = f + 18;
 338
 339         // skip TARGA image comment (usually 0 bytes)
 340         fin += targa_header.id_length;
 341
 342         // read/skip the colormap if present (note: according to the TARGA spec it
 343         // can be present even on truecolor or greyscale images, just not used by
 344         // the image data)
 345         if (targa_header.colormap_type)
 346         {
 347                 if (targa_header.colormap_length > 256)
 348                 {
 349                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 350                         PrintTargaHeader(&targa_header);
 351                         return NULL;
 352                 }
 353                 if (targa_header.colormap_index)
 354                 {
 355                         Con_Print("LoadTGA: colormap_index not supported\n");
 356                         PrintTargaHeader(&targa_header);
 357                         return NULL;
 358                 }
 359                 if (targa_header.colormap_size == 24)
 360                 {
 361                         for (x = 0;x < targa_header.colormap_length;x++)
 362                         {
 363                                 palette[x*4+2] = *fin++;
 364                                 palette[x*4+1] = *fin++;
 365                                 palette[x*4+0] = *fin++;
 366                                 palette[x*4+3] = 255;
 367                         }
 368                 }
 369                 else if (targa_header.colormap_size == 32)
 370                 {
 371                         for (x = 0;x < targa_header.colormap_length;x++)
 372                         {
 373                                 palette[x*4+2] = *fin++;
 374                                 palette[x*4+1] = *fin++;
 375                                 palette[x*4+0] = *fin++;
 376                                 palette[x*4+3] = *fin++;
 377                         }
 378                 }
 379                 else
 380                 {
 381                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 382                         PrintTargaHeader(&targa_header);
 383                         return NULL;
 384                 }
 385         }
 386
 387         // check our pixel_size restrictions according to image_type
 388         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 389         {
 390                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 391                 {
 392                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 393                         PrintTargaHeader(&targa_header);
 394                         return NULL;
 395                 }
 396         }
 397         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 398         {
 399                 if (targa_header.pixel_size != 8)
 400                 {
 401                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images 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         // number of attribute bits per pixel, we only support 0 or 8
 429         alphabits = targa_header.attributes & 0x0F;
 430         if (alphabits != 8 && alphabits != 0)
 431         {
 432                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
 433                 return NULL;
 434         }
 435
 436         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 437         if (!image_rgba)
 438         {
 439                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 440                 return NULL;
 441         }
 442
 443         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 444         if ((targa_header.attributes & 0x20) == 0)
 445         {
 446                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 447                 row_inc = -image_width*4*2;
 448         }
 449         else
 450         {
 451                 pixbuf = image_rgba;
 452                 row_inc = 0;
 453         }
 454
 455         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 456         x = 0;
 457         y = 0;
 458         red = green = blue = alpha = 255;
 459         while (y < image_height)
 460         {
 461                 // decoder is mostly the same whether it's compressed or not
 462                 readpixelcount = 1000000;
 463                 runlen = 1000000;
 464                 if (compressed && fin < enddata)
 465                 {
 466                         runlen = *fin++;
 467                         // high bit indicates this is an RLE compressed run
 468                         if (runlen & 0x80)
 469                                 readpixelcount = 1;
 470                         runlen = 1 + (runlen & 0x7f);
 471                 }
 472
 473                 while((runlen--) && y < image_height)
 474                 {
 475                         if (readpixelcount > 0)
 476                         {
 477                                 readpixelcount--;
 478                                 red = green = blue = alpha = 255;
 479                                 if (fin < enddata)
 480                                 {
 481                                         switch(targa_header.image_type)
 482                                         {
 483                                         case 1:
 484                                         case 9:
 485                                                 // colormapped
 486                                                 pindex = *fin++;
 487                                                 if (pindex >= targa_header.colormap_length)
 488                                                         pindex = 0; // error
 489                                                 p = palette + pindex * 4;
 490                                                 red = p[0];
 491                                                 green = p[1];
 492                                                 blue = p[2];
 493                                                 alpha = p[3];
 494                                                 break;
 495                                         case 2:
 496                                         case 10:
 497                                                 // BGR or BGRA
 498                                                 blue = *fin++;
 499                                                 if (fin < enddata)
 500                                                         green = *fin++;
 501                                                 if (fin < enddata)
 502                                                         red = *fin++;
 503                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 504                                                         alpha = *fin++;
 505                                                 break;
 506                                         case 3:
 507                                         case 11:
 508                                                 // greyscale
 509                                                 red = green = blue = *fin++;
 510                                                 break;
 511                                         }
 512                                         if (!alphabits)
 513                                                 alpha = 255;
 514                                 }
 515                         }
 516                         *pixbuf++ = red;
 517                         *pixbuf++ = green;
 518                         *pixbuf++ = blue;
 519                         *pixbuf++ = alpha;
 520                         x++;
 521                         if (x == image_width)
 522                         {
 523                                 // end of line, advance to next
 524                                 x = 0;
 525                                 y++;
 526                                 pixbuf += row_inc;
 527                         }
 528                 }
 529         }
 530
 531         return image_rgba;
 532 }
 533
 534 /*
 535 ============
 536 LoadLMP
 537 ============
 538 */
 539 qbyte *LoadLMP (const qbyte *f, int matchwidth, int matchheight, qboolean loadAs8Bit)
 540 {
 541         qbyte *image_buffer;
 542
 543         if (fs_filesize < 9)
 544         {
 545                 Con_Print("LoadLMP: invalid LMP file\n");
 546                 return NULL;
 547         }
 548
 549         // parse the very complicated header *chuckle*
 550         image_width = BuffLittleLong(f);
 551         image_height = BuffLittleLong(f + 4);
 552         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 553         {
 554                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 555                 return NULL;
 556         }
 557         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 558                 return NULL;
 559
 560         if (fs_filesize < (fs_offset_t)(8 + image_width * image_height))
 561         {
 562                 Con_Print("LoadLMP: invalid LMP file\n");
 563                 return NULL;
 564         }
 565
 566         if (loadAs8Bit)
 567         {
 568                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height);
 569                 memcpy(image_buffer, f + 8, image_width * image_height);
 570         }
 571         else
 572         {
 573                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height * 4);
 574                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_complete);
 575         }
 576         return image_buffer;
 577 }
 578
 579 static qbyte *LoadLMPRGBA (const qbyte *f, int matchwidth, int matchheight)
 580 {
 581         return LoadLMP(f, matchwidth, matchheight, false);
 582 }
 583
 584
 585 typedef struct
 586 {
 587         char            name[32];
 588         unsigned        width, height;
 589         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 590         char            animname[32];                   // next frame in animation chain
 591         int                     flags;
 592         int                     contents;
 593         int                     value;
 594 } q2wal_t;
 595
 596 qbyte *LoadWAL (const qbyte *f, int matchwidth, int matchheight)
 597 {
 598         qbyte *image_rgba;
 599         const q2wal_t *inwal = (const void *)f;
 600
 601         if (fs_filesize < (int) sizeof(q2wal_t))
 602         {
 603                 Con_Print("LoadWAL: invalid WAL file\n");
 604                 return NULL;
 605         }
 606
 607         image_width = LittleLong(inwal->width);
 608         image_height = LittleLong(inwal->height);
 609         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 610         {
 611                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 612                 return NULL;
 613         }
 614         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 615                 return NULL;
 616
 617         if ((int) fs_filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 618         {
 619                 Con_Print("LoadWAL: invalid WAL file\n");
 620                 return NULL;
 621         }
 622
 623         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 624         if (!image_rgba)
 625         {
 626                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 627                 return NULL;
 628         }
 629         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 630         return image_rgba;
 631 }
 632
 633
 634 void Image_StripImageExtension (const char *in, char *out)
 635 {
 636         const char *end, *temp;
 637         end = in + strlen(in);
 638         if ((end - in) >= 4)
 639         {
 640                 temp = end - 4;
 641                 if (strcmp(temp, ".tga") == 0
 642                  || strcmp(temp, ".pcx") == 0
 643                  || strcmp(temp, ".lmp") == 0
 644                  || strcmp(temp, ".png") == 0
 645                  || strcmp(temp, ".jpg") == 0)
 646                         end = temp;
 647                 while (in < end)
 648                         *out++ = *in++;
 649                 *out++ = 0;
 650         }
 651         else
 652                 strcpy(out, in);
 653 }
 654
 655 struct
 656 {
 657         const char *formatstring;
 658         qbyte *(*loadfunc)(const qbyte *f, int matchwidth, int matchheight);
 659 }
 660 imageformats[] =
 661 {
 662         {"override/%s.tga", LoadTGA},
 663         {"override/%s.jpg", JPEG_LoadImage},
 664         {"textures/%s.tga", LoadTGA},
 665         {"textures/%s.jpg", JPEG_LoadImage},
 666         {"textures/%s.pcx", LoadPCX},
 667         {"textures/%s.wal", LoadWAL},
 668         {"%s.tga", LoadTGA},
 669         {"%s.jpg", JPEG_LoadImage},
 670         {"%s.pcx", LoadPCX},
 671         {"%s.lmp", LoadLMPRGBA},
 672         {NULL, NULL}
 673 };
 674
 675 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 676 {
 677         int i;
 678         qbyte *f, *data = NULL;
 679         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 680         if (developer_memorydebug.integer)
 681                 Mem_CheckSentinelsGlobal();
 682         if (developer_texturelogging.integer)
 683                 Log_Printf("textures.log", "%s\n", filename);
 684         strlcpy(basename, filename, sizeof(basename));
 685         Image_StripImageExtension(basename, basename); // strip filename extensions to allow replacement by other types
 686         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 687         for (c = basename;*c;c++)
 688                 if (*c == '*')
 689                         *c = '#';
 690         for (i = 0;imageformats[i].formatstring;i++)
 691         {
 692                 sprintf (name, imageformats[i].formatstring, basename);
 693                 f = FS_LoadFile(name, tempmempool, true);
 694                 if (f)
 695                 {
 696                         data = imageformats[i].loadfunc(f, matchwidth, matchheight);
 697                         Mem_Free(f);
 698                         if (data)
 699                         {
 700                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 701                                 if (developer_memorydebug.integer)
 702                                         Mem_CheckSentinelsGlobal();
 703                                 return data;
 704                         }
 705                 }
 706         }
 707         if (complain)
 708         {
 709                 Con_Printf("Couldn't load %s using ", filename);
 710                 for (i = 0;imageformats[i].formatstring;i++)
 711                 {
 712                         sprintf (name, imageformats[i].formatstring, basename);
 713                         Con_Printf(i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
 714                 }
 715         }
 716         if (developer_memorydebug.integer)
 717                 Mem_CheckSentinelsGlobal();
 718         return NULL;
 719 }
 720
 721 int image_makemask (const qbyte *in, qbyte *out, int size)
 722 {
 723         int i, count;
 724         count = 0;
 725         for (i = 0;i < size;i++)
 726         {
 727                 out[0] = out[1] = out[2] = 255;
 728                 out[3] = in[3];
 729                 if (in[3] != 255)
 730                         count++;
 731                 in += 4;
 732                 out += 4;
 733         }
 734         return count;
 735 }
 736
 737 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 738 {
 739         qbyte *in, *data;
 740         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 741         if (!data)
 742                 return NULL;
 743         if (image_makemask(data, data, image_width * image_height))
 744                 return data; // some transparency
 745         else
 746         {
 747                 Mem_Free(data);
 748                 return NULL; // all opaque
 749         }
 750 }
 751
 752 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 753 {
 754         qbyte *data;
 755         rtexture_t *rt;
 756         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 757                 return 0;
 758         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 759         Mem_Free(data);
 760         return rt;
 761 }
 762
 763 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 764 {
 765         qbyte *data;
 766         rtexture_t *rt;
 767         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
 768                 return 0;
 769         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 770         Mem_Free(data);
 771         return rt;
 772 }
 773
 774 rtexture_t *image_masktex;
 775 rtexture_t *image_nmaptex;
 776 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 777 {
 778         qbyte *data;
 779         rtexture_t *rt;
 780         image_masktex = NULL;
 781         image_nmaptex = NULL;
 782         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 783                 return 0;
 784
 785         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 786
 787         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 788                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 789
 790         Mem_Free(data);
 791         return rt;
 792 }
 793
 794 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 795 {
 796         qbyte *data, *data2;
 797         rtexture_t *rt;
 798         image_masktex = NULL;
 799         image_nmaptex = NULL;
 800         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 801                 return 0;
 802
 803         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 804
 805         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 806
 807         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 808         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 809
 810         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 811                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 812
 813         Mem_Free(data2);
 814
 815         Mem_Free(data);
 816         return rt;
 817 }
 818
 819 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 820 {
 821         qbyte *data, *data2;
 822         rtexture_t *rt;
 823         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 824                 return 0;
 825         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 826
 827         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 828         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 829
 830         Mem_Free(data2);
 831         Mem_Free(data);
 832         return rt;
 833 }
 834
 835 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data, qbyte *buffer)
 836 {
 837         qboolean ret;
 838         qbyte *out;
 839         const qbyte *in, *end;
 840
 841         memset (buffer, 0, 18);
 842         buffer[2] = 2;          // uncompressed type
 843         buffer[12] = (width >> 0) & 0xFF;
 844         buffer[13] = (width >> 8) & 0xFF;
 845         buffer[14] = (height >> 0) & 0xFF;
 846         buffer[15] = (height >> 8) & 0xFF;
 847         buffer[16] = 24;        // pixel size
 848
 849         // swap rgb to bgr
 850         in = data;
 851         out = buffer + 18;
 852         end = in + width*height*3;
 853         for (;in < end;in += 3)
 854         {
 855                 *out++ = in[2];
 856                 *out++ = in[1];
 857                 *out++ = in[0];
 858         }
 859         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 860
 861         return ret;
 862 }
 863
 864 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
 865 {
 866         int y;
 867         qbyte *buffer, *out;
 868         const qbyte *in, *end;
 869
 870         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 871
 872         memset (buffer, 0, 18);
 873         buffer[2] = 2;          // uncompressed type
 874         buffer[12] = (width >> 0) & 0xFF;
 875         buffer[13] = (width >> 8) & 0xFF;
 876         buffer[14] = (height >> 0) & 0xFF;
 877         buffer[15] = (height >> 8) & 0xFF;
 878         buffer[16] = 24;        // pixel size
 879
 880         // swap rgb to bgr and flip upside down
 881         out = buffer + 18;
 882         for (y = height - 1;y >= 0;y--)
 883         {
 884                 in = data + y * width * 3;
 885                 end = in + width * 3;
 886                 for (;in < end;in += 3)
 887                 {
 888                         *out++ = in[2];
 889                         *out++ = in[1];
 890                         *out++ = in[0];
 891                 }
 892         }
 893         FS_WriteFile (filename, buffer, width*height*3 + 18 );
 894
 895         Mem_Free(buffer);
 896 }
 897
 898 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
 899 {
 900         int y;
 901         qbyte *buffer, *out;
 902         const qbyte *in, *end;
 903
 904         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
 905
 906         memset (buffer, 0, 18);
 907         buffer[2] = 2;          // uncompressed type
 908         buffer[12] = (width >> 0) & 0xFF;
 909         buffer[13] = (width >> 8) & 0xFF;
 910         buffer[14] = (height >> 0) & 0xFF;
 911         buffer[15] = (height >> 8) & 0xFF;
 912         buffer[16] = 32;        // pixel size
 913         buffer[17] = 8; // transparent flag? (seems to be needed by gimp)
 914
 915         // swap rgba to bgra and flip upside down
 916         out = buffer + 18;
 917         for (y = height - 1;y >= 0;y--)
 918         {
 919                 in = data + y * width * 4;
 920                 end = in + width * 4;
 921                 for (;in < end;in += 4)
 922                 {
 923                         *out++ = in[2];
 924                         *out++ = in[1];
 925                         *out++ = in[0];
 926                         *out++ = in[3];
 927                 }
 928         }
 929         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 930
 931         Mem_Free(buffer);
 932 }
 933
 934 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
 935 {
 936         const qbyte *end;
 937         if (rgba)
 938         {
 939                 // check alpha bytes
 940                 for (end = data + size * 4, data += 3;data < end;data += 4)
 941                         if (*data < 255)
 942                                 return 1;
 943         }
 944         else
 945         {
 946                 // color 255 is transparent
 947                 for (end = data + size;data < end;data++)
 948                         if (*data == 255)
 949                                 return 1;
 950         }
 951         return 0;
 952 }
 953
 954 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 955 {
 956         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 957         fstep = (int) (inwidth*65536.0f/outwidth);
 958         endx = (inwidth-1);
 959         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 960         {
 961                 xi = f >> 16;
 962                 if (xi != oldx)
 963                 {
 964                         in += (xi - oldx) * 4;
 965                         oldx = xi;
 966                 }
 967                 if (xi < endx)
 968                 {
 969                         lerp = f & 0xFFFF;
 970                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 971                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 972                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 973                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 974                 }
 975                 else // last pixel of the line has no pixel to lerp to
 976                 {
 977                         *out++ = in[0];
 978                         *out++ = in[1];
 979                         *out++ = in[2];
 980                         *out++ = in[3];
 981                 }
 982         }
 983 }
 984
 985 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 986 {
 987         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 988         fstep = (int) (inwidth*65536.0f/outwidth);
 989         endx = (inwidth-1);
 990         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 991         {
 992                 xi = f >> 16;
 993                 if (xi != oldx)
 994                 {
 995                         in += (xi - oldx) * 3;
 996                         oldx = xi;
 997                 }
 998                 if (xi < endx)
 999                 {
1000                         lerp = f & 0xFFFF;
1001                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1002                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1003                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1004                 }
1005                 else // last pixel of the line has no pixel to lerp to
1006                 {
1007                         *out++ = in[0];
1008                         *out++ = in[1];
1009                         *out++ = in[2];
1010                 }
1011         }
1012 }
1013
1014 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1015 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1016 {
1017         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1018         qbyte *out;
1019         const qbyte *inrow;
1020         qbyte *resamplerow1;
1021         qbyte *resamplerow2;
1022         out = outdata;
1023         fstep = (int) (inheight*65536.0f/outheight);
1024
1025         resamplerow1 = Mem_Alloc(tempmempool, outwidth*4*2);
1026         resamplerow2 = resamplerow1 + outwidth*4;
1027
1028         inrow = indata;
1029         oldy = 0;
1030         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1031         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1032         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1033         {
1034                 yi = f >> 16;
1035                 if (yi < endy)
1036                 {
1037                         lerp = f & 0xFFFF;
1038                         if (yi != oldy)
1039                         {
1040                                 inrow = (qbyte *)indata + inwidth4*yi;
1041                                 if (yi == oldy+1)
1042                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1043                                 else
1044                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1045                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1046                                 oldy = yi;
1047                         }
1048                         j = outwidth - 4;
1049                         while(j >= 0)
1050                         {
1051                                 LERPBYTE( 0);
1052                                 LERPBYTE( 1);
1053                                 LERPBYTE( 2);
1054                                 LERPBYTE( 3);
1055                                 LERPBYTE( 4);
1056                                 LERPBYTE( 5);
1057                                 LERPBYTE( 6);
1058                                 LERPBYTE( 7);
1059                                 LERPBYTE( 8);
1060                                 LERPBYTE( 9);
1061                                 LERPBYTE(10);
1062                                 LERPBYTE(11);
1063                                 LERPBYTE(12);
1064                                 LERPBYTE(13);
1065                                 LERPBYTE(14);
1066                                 LERPBYTE(15);
1067                                 out += 16;
1068                                 resamplerow1 += 16;
1069                                 resamplerow2 += 16;
1070                                 j -= 4;
1071                         }
1072                         if (j & 2)
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                                 out += 8;
1083                                 resamplerow1 += 8;
1084                                 resamplerow2 += 8;
1085                         }
1086                         if (j & 1)
1087                         {
1088                                 LERPBYTE( 0);
1089                                 LERPBYTE( 1);
1090                                 LERPBYTE( 2);
1091                                 LERPBYTE( 3);
1092                                 out += 4;
1093                                 resamplerow1 += 4;
1094                                 resamplerow2 += 4;
1095                         }
1096                         resamplerow1 -= outwidth4;
1097                         resamplerow2 -= outwidth4;
1098                 }
1099                 else
1100                 {
1101                         if (yi != oldy)
1102                         {
1103                                 inrow = (qbyte *)indata + inwidth4*yi;
1104                                 if (yi == oldy+1)
1105                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1106                                 else
1107                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1108                                 oldy = yi;
1109                         }
1110                         memcpy(out, resamplerow1, outwidth4);
1111                 }
1112         }
1113
1114         Mem_Free(resamplerow1);
1115         resamplerow1 = NULL;
1116         resamplerow2 = NULL;
1117 }
1118
1119 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1120 {
1121         int i, j;
1122         unsigned frac, fracstep;
1123         // relies on int being 4 bytes
1124         int *inrow, *out;
1125         out = outdata;
1126
1127         fracstep = inwidth*0x10000/outwidth;
1128         for (i = 0;i < outheight;i++)
1129         {
1130                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1131                 frac = fracstep >> 1;
1132                 j = outwidth - 4;
1133                 while (j >= 0)
1134                 {
1135                         out[0] = inrow[frac >> 16];frac += fracstep;
1136                         out[1] = inrow[frac >> 16];frac += fracstep;
1137                         out[2] = inrow[frac >> 16];frac += fracstep;
1138                         out[3] = inrow[frac >> 16];frac += fracstep;
1139                         out += 4;
1140                         j -= 4;
1141                 }
1142                 if (j & 2)
1143                 {
1144                         out[0] = inrow[frac >> 16];frac += fracstep;
1145                         out[1] = inrow[frac >> 16];frac += fracstep;
1146                         out += 2;
1147                 }
1148                 if (j & 1)
1149                 {
1150                         out[0] = inrow[frac >> 16];frac += fracstep;
1151                         out += 1;
1152                 }
1153         }
1154 }
1155
1156 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1157 {
1158         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1159         qbyte *out;
1160         const qbyte *inrow;
1161         qbyte *resamplerow1;
1162         qbyte *resamplerow2;
1163         out = outdata;
1164         fstep = (int) (inheight*65536.0f/outheight);
1165
1166         resamplerow1 = Mem_Alloc(tempmempool, outwidth*3*2);
1167         resamplerow2 = resamplerow1 + outwidth*3;
1168
1169         inrow = indata;
1170         oldy = 0;
1171         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1172         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1173         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1174         {
1175                 yi = f >> 16;
1176                 if (yi < endy)
1177                 {
1178                         lerp = f & 0xFFFF;
1179                         if (yi != oldy)
1180                         {
1181                                 inrow = (qbyte *)indata + inwidth3*yi;
1182                                 if (yi == oldy+1)
1183                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1184                                 else
1185                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1186                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1187                                 oldy = yi;
1188                         }
1189                         j = outwidth - 4;
1190                         while(j >= 0)
1191                         {
1192                                 LERPBYTE( 0);
1193                                 LERPBYTE( 1);
1194                                 LERPBYTE( 2);
1195                                 LERPBYTE( 3);
1196                                 LERPBYTE( 4);
1197                                 LERPBYTE( 5);
1198                                 LERPBYTE( 6);
1199                                 LERPBYTE( 7);
1200                                 LERPBYTE( 8);
1201                                 LERPBYTE( 9);
1202                                 LERPBYTE(10);
1203                                 LERPBYTE(11);
1204                                 out += 12;
1205                                 resamplerow1 += 12;
1206                                 resamplerow2 += 12;
1207                                 j -= 4;
1208                         }
1209                         if (j & 2)
1210                         {
1211                                 LERPBYTE( 0);
1212                                 LERPBYTE( 1);
1213                                 LERPBYTE( 2);
1214                                 LERPBYTE( 3);
1215                                 LERPBYTE( 4);
1216                                 LERPBYTE( 5);
1217                                 out += 6;
1218                                 resamplerow1 += 6;
1219                                 resamplerow2 += 6;
1220                         }
1221                         if (j & 1)
1222                         {
1223                                 LERPBYTE( 0);
1224                                 LERPBYTE( 1);
1225                                 LERPBYTE( 2);
1226                                 out += 3;
1227                                 resamplerow1 += 3;
1228                                 resamplerow2 += 3;
1229                         }
1230                         resamplerow1 -= outwidth3;
1231                         resamplerow2 -= outwidth3;
1232                 }
1233                 else
1234                 {
1235                         if (yi != oldy)
1236                         {
1237                                 inrow = (qbyte *)indata + inwidth3*yi;
1238                                 if (yi == oldy+1)
1239                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1240                                 else
1241                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1242                                 oldy = yi;
1243                         }
1244                         memcpy(out, resamplerow1, outwidth3);
1245                 }
1246         }
1247         Mem_Free(resamplerow1);
1248         resamplerow1 = NULL;
1249         resamplerow2 = NULL;
1250 }
1251
1252 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1253 {
1254         int i, j, f, inwidth3 = inwidth * 3;
1255         unsigned frac, fracstep;
1256         qbyte *inrow, *out;
1257         out = outdata;
1258
1259         fracstep = inwidth*0x10000/outwidth;
1260         for (i = 0;i < outheight;i++)
1261         {
1262                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1263                 frac = fracstep >> 1;
1264                 j = outwidth - 4;
1265                 while (j >= 0)
1266                 {
1267                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1268                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1269                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1270                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1271                         j -= 4;
1272                 }
1273                 if (j & 2)
1274                 {
1275                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1276                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1277                         out += 2;
1278                 }
1279                 if (j & 1)
1280                 {
1281                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1282                         out += 1;
1283                 }
1284         }
1285 }
1286
1287 /*
1288 ================
1289 Image_Resample
1290 ================
1291 */
1292 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1293 {
1294         if (indepth != 1 || outdepth != 1)
1295         {
1296                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1297                 return;
1298         }
1299         if (bytesperpixel == 4)
1300         {
1301                 if (quality)
1302                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1303                 else
1304                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1305         }
1306         else if (bytesperpixel == 3)
1307         {
1308                 if (quality)
1309                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1310                 else
1311                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1312         }
1313         else
1314                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1315 }
1316
1317 // in can be the same as out
1318 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1319 {
1320         int x, y, nextrow;
1321         if (*depth != 1 || destdepth != 1)
1322         {
1323                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1324                 return;
1325         }
1326         nextrow = *width * bytesperpixel;
1327         if (*width > destwidth)
1328         {
1329                 *width >>= 1;
1330                 if (*height > destheight)
1331                 {
1332                         // reduce both
1333                         *height >>= 1;
1334                         if (bytesperpixel == 4)
1335                         {
1336                                 for (y = 0;y < *height;y++)
1337                                 {
1338                                         for (x = 0;x < *width;x++)
1339                                         {
1340                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1341                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1342                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1343                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1344                                                 out += 4;
1345                                                 in += 8;
1346                                         }
1347                                         in += nextrow; // skip a line
1348                                 }
1349                         }
1350                         else if (bytesperpixel == 3)
1351                         {
1352                                 for (y = 0;y < *height;y++)
1353                                 {
1354                                         for (x = 0;x < *width;x++)
1355                                         {
1356                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1357                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1358                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1359                                                 out += 3;
1360                                                 in += 6;
1361                                         }
1362                                         in += nextrow; // skip a line
1363                                 }
1364                         }
1365                         else
1366                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1367                 }
1368                 else
1369                 {
1370                         // reduce width
1371                         if (bytesperpixel == 4)
1372                         {
1373                                 for (y = 0;y < *height;y++)
1374                                 {
1375                                         for (x = 0;x < *width;x++)
1376                                         {
1377                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1378                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1379                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1380                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1381                                                 out += 4;
1382                                                 in += 8;
1383                                         }
1384                                 }
1385                         }
1386                         else if (bytesperpixel == 3)
1387                         {
1388                                 for (y = 0;y < *height;y++)
1389                                 {
1390                                         for (x = 0;x < *width;x++)
1391                                         {
1392                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1393                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1394                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1395                                                 out += 3;
1396                                                 in += 6;
1397                                         }
1398                                 }
1399                         }
1400                         else
1401                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1402                 }
1403         }
1404         else
1405         {
1406                 if (*height > destheight)
1407                 {
1408                         // reduce height
1409                         *height >>= 1;
1410                         if (bytesperpixel == 4)
1411                         {
1412                                 for (y = 0;y < *height;y++)
1413                                 {
1414                                         for (x = 0;x < *width;x++)
1415                                         {
1416                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1417                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1418                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1419                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1420                                                 out += 4;
1421                                                 in += 4;
1422                                         }
1423                                         in += nextrow; // skip a line
1424                                 }
1425                         }
1426                         else if (bytesperpixel == 3)
1427                         {
1428                                 for (y = 0;y < *height;y++)
1429                                 {
1430                                         for (x = 0;x < *width;x++)
1431                                         {
1432                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1433                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1434                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1435                                                 out += 3;
1436                                                 in += 3;
1437                                         }
1438                                         in += nextrow; // skip a line
1439                                 }
1440                         }
1441                         else
1442                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1443                 }
1444                 else
1445                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1446         }
1447 }
1448
1449 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1450 {
1451         int x, y;
1452         const unsigned char *p0, *p1, *p2;
1453         unsigned char *out;
1454         float iwidth, iheight, ibumpscale, n[3];
1455         iwidth = 1.0f / width;
1456         iheight = 1.0f / height;
1457         ibumpscale = (255.0f * 3.0f) / bumpscale;
1458         out = outpixels;
1459         for (y = 0;y < height;y++)
1460         {
1461                 for (x = 0;x < width;x++)
1462                 {
1463                         p0 = inpixels + (y * width + x) * 4;
1464                         if (x == width - 1)
1465                         {
1466                                 if (clamp)
1467                                         p1 = inpixels + (y * width + x) * 4;
1468                                 else
1469                                         p1 = inpixels + (y * width) * 4;
1470                         }
1471                         else
1472                                 p1 = inpixels + (y * width + x + 1) * 4;
1473                         if (y == height - 1)
1474                         {
1475                                 if (clamp)
1476                                         p2 = inpixels + (y * width + x) * 4;
1477                                 else
1478                                         p2 = inpixels + x * 4;
1479                         }
1480                         else
1481                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1482                         /*
1483                         dv[0][0] = iwidth;
1484                         dv[0][1] = 0;
1485                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1486                         dv[1][0] = 0;
1487                         dv[1][1] = iheight;
1488                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1489                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1490                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1491                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1492                         */
1493                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1494                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1495                         n[2] = ibumpscale;
1496                         VectorNormalize(n);
1497                         /*
1498                         // this should work for the bottom right triangle if anyone wants
1499                         // code for that for some reason
1500                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1501                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1502                         n[2] = ibumpscale;
1503                         VectorNormalize(n);
1504                         */
1505                         out[0] = 128.0f + n[0] * 127.0f;
1506                         out[1] = 128.0f + n[1] * 127.0f;
1507                         out[2] = 128.0f + n[2] * 127.0f;
1508                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1509                         out += 4;
1510                 }
1511         }
1512 }
1513
1514 int image_loadskin(imageskin_t *s, char *shadername)
1515 {
1516         int j;
1517         qbyte *bumppixels;
1518         int bumppixels_width, bumppixels_height;
1519         char name[MAX_QPATH];
1520         strlcpy(name, shadername, sizeof(name));
1521         Image_StripImageExtension(name, name);
1522         memset(s, 0, sizeof(*s));
1523         s->basepixels = loadimagepixels(name, false, 0, 0);
1524         if (s->basepixels == NULL)
1525                 return false;
1526         s->basepixels_width = image_width;
1527         s->basepixels_height = image_height;
1528
1529         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1530         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1531         {
1532                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1533                 s->maskpixels_width = s->basepixels_width;
1534                 s->maskpixels_height = s->basepixels_height;
1535                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1536                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1537                 {
1538                         s->maskpixels[j+0] = 255;
1539                         s->maskpixels[j+1] = 255;
1540                         s->maskpixels[j+2] = 255;
1541                 }
1542         }
1543
1544         // _luma is supported for tenebrae compatibility
1545         // (I think it's a very stupid name, but oh well)
1546         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1547          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1548         {
1549                 s->glowpixels_width = image_width;
1550                 s->glowpixels_height = image_height;
1551         }
1552         // _norm is the name used by tenebrae
1553         // (I don't like the name much)
1554         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1555         {
1556                 s->nmappixels_width = image_width;
1557                 s->nmappixels_height = image_height;
1558         }
1559         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1560         {
1561                 bumppixels_width = image_width;
1562                 bumppixels_height = image_height;
1563         }
1564         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1565         {
1566                 s->glosspixels_width = image_width;
1567                 s->glosspixels_height = image_height;
1568         }
1569         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1570         {
1571                 s->pantspixels_width = image_width;
1572                 s->pantspixels_height = image_height;
1573         }
1574         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1575         {
1576                 s->shirtpixels_width = image_width;
1577                 s->shirtpixels_height = image_height;
1578         }
1579
1580         if (s->nmappixels == NULL)
1581         {
1582                 if (bumppixels != NULL)
1583                 {
1584                         if (r_shadow_bumpscale_bumpmap.value > 0)
1585                         {
1586                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1587                                 s->nmappixels_width = bumppixels_width;
1588                                 s->nmappixels_height = bumppixels_height;
1589                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1590                         }
1591                 }
1592                 else
1593                 {
1594                         if (r_shadow_bumpscale_basetexture.value > 0)
1595                         {
1596                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1597                                 s->nmappixels_width = s->basepixels_width;
1598                                 s->nmappixels_height = s->basepixels_height;
1599                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1600                         }
1601                 }
1602         }
1603         if (bumppixels != NULL)
1604                 Mem_Free(bumppixels);
1605         return true;
1606 }
1607
1608 void image_freeskin(imageskin_t *s)
1609 {
1610         if (s->basepixels)
1611                 Mem_Free(s->basepixels);
1612         if (s->maskpixels)
1613                 Mem_Free(s->maskpixels);
1614         if (s->nmappixels)
1615                 Mem_Free(s->nmappixels);
1616         if (s->glowpixels)
1617                 Mem_Free(s->glowpixels);
1618         if (s->glosspixels)
1619                 Mem_Free(s->glosspixels);
1620         if (s->pantspixels)
1621                 Mem_Free(s->pantspixels);
1622         if (s->shirtpixels)
1623                 Mem_Free(s->shirtpixels);
1624         memset(s, 0, sizeof(*s));
1625 }
1626