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(unsigned char *outpixels, const unsigned char *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 unsigned char *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(unsigned char *outpixels, const unsigned char *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 unsigned char *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 unsigned char *in, unsigned char *out, int pixels, const unsigned char *gammar, const unsigned char *gammag, const unsigned char *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 unsigned char *in, unsigned char *out, int pixels, const unsigned int *pal)
 118 {
 119         int *iout = (int *)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 pcx_s
 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 unsigned char* LoadPCX (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 184 {
 185         pcx_t pcx;
 186         unsigned char *a, *b, *image_rgba, *pbuf;
 187         const unsigned char *palette, *fin, *enddata;
 188         int x, y, x2, dataByte;
 189
 190         if (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 + filesize - 768;
 222
 223         image_rgba = (unsigned char *)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 unsigned char *LoadTGA (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 301 {
 302         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex, alphabits;
 303         unsigned char *pixbuf, *image_rgba;
 304         const unsigned char *fin, *enddata;
 305         unsigned char *p;
 306         TargaHeader targa_header;
 307         unsigned char palette[256*4];
 308
 309         if (filesize < 19)
 310                 return NULL;
 311
 312         enddata = f + 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 = (unsigned char *)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 unsigned char *LoadLMP (const unsigned char *f, int filesize, int matchwidth, int matchheight, qboolean loadAs8Bit)
 540 {
 541         unsigned char *image_buffer;
 542
 543         if (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 (filesize < (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 = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height);
 569                 memcpy(image_buffer, f + 8, image_width * image_height);
 570         }
 571         else
 572         {
 573                 image_buffer = (unsigned char *)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 unsigned char *LoadLMPRGBA (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 580 {
 581         return LoadLMP(f, filesize, matchwidth, matchheight, false);
 582 }
 583
 584
 585 typedef struct q2wal_s
 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 unsigned char *LoadWAL (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 597 {
 598         unsigned char *image_rgba;
 599         const q2wal_t *inwal = (const q2wal_t *)f;
 600
 601         if (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 (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 = (unsigned char *)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 imageformat_s
 656 {
 657         const char *formatstring;
 658         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, 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 unsigned char *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 676 {
 677         int i;
 678         fs_offset_t filesize;
 679         unsigned char *f, *data = NULL;
 680         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 681         if (developer_memorydebug.integer)
 682                 Mem_CheckSentinelsGlobal();
 683         if (developer_texturelogging.integer)
 684                 Log_Printf("textures.log", "%s\n", filename);
 685         strlcpy(basename, filename, sizeof(basename));
 686         Image_StripImageExtension(basename, basename); // strip filename extensions to allow replacement by other types
 687         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 688         for (c = basename;*c;c++)
 689                 if (*c == '*')
 690                         *c = '#';
 691         for (i = 0;imageformats[i].formatstring;i++)
 692         {
 693                 sprintf (name, imageformats[i].formatstring, basename);
 694                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 695                 if (f)
 696                 {
 697                         data = imageformats[i].loadfunc(f, filesize, matchwidth, matchheight);
 698                         Mem_Free(f);
 699                         if (data)
 700                         {
 701                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 702                                 if (developer_memorydebug.integer)
 703                                         Mem_CheckSentinelsGlobal();
 704                                 return data;
 705                         }
 706                 }
 707         }
 708         if (complain)
 709         {
 710                 Con_Printf("Couldn't load %s using ", filename);
 711                 for (i = 0;imageformats[i].formatstring;i++)
 712                 {
 713                         sprintf (name, imageformats[i].formatstring, basename);
 714                         Con_Printf(i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
 715                 }
 716         }
 717         if (developer_memorydebug.integer)
 718                 Mem_CheckSentinelsGlobal();
 719         return NULL;
 720 }
 721
 722 int image_makemask (const unsigned char *in, unsigned char *out, int size)
 723 {
 724         int i, count;
 725         count = 0;
 726         for (i = 0;i < size;i++)
 727         {
 728                 out[0] = out[1] = out[2] = 255;
 729                 out[3] = in[3];
 730                 if (in[3] != 255)
 731                         count++;
 732                 in += 4;
 733                 out += 4;
 734         }
 735         return count;
 736 }
 737
 738 unsigned char* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 739 {
 740         unsigned char *in, *data;
 741         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 742         if (!data)
 743                 return NULL;
 744         if (image_makemask(data, data, image_width * image_height))
 745                 return data; // some transparency
 746         else
 747         {
 748                 Mem_Free(data);
 749                 return NULL; // all opaque
 750         }
 751 }
 752
 753 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 754 {
 755         unsigned char *data;
 756         rtexture_t *rt;
 757         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 758                 return 0;
 759         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 760         Mem_Free(data);
 761         return rt;
 762 }
 763
 764 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 765 {
 766         unsigned char *data;
 767         rtexture_t *rt;
 768         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
 769                 return 0;
 770         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 771         Mem_Free(data);
 772         return rt;
 773 }
 774
 775 rtexture_t *image_masktex;
 776 rtexture_t *image_nmaptex;
 777 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 778 {
 779         unsigned char *data;
 780         rtexture_t *rt;
 781         image_masktex = NULL;
 782         image_nmaptex = NULL;
 783         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 784                 return 0;
 785
 786         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 787
 788         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 789                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 790
 791         Mem_Free(data);
 792         return rt;
 793 }
 794
 795 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 796 {
 797         unsigned char *data, *data2;
 798         rtexture_t *rt;
 799         image_masktex = NULL;
 800         image_nmaptex = NULL;
 801         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 802                 return 0;
 803
 804         data2 = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 805
 806         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 807
 808         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 809         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 810
 811         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 812                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 813
 814         Mem_Free(data2);
 815
 816         Mem_Free(data);
 817         return rt;
 818 }
 819
 820 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 821 {
 822         unsigned char *data, *data2;
 823         rtexture_t *rt;
 824         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 825                 return 0;
 826         data2 = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 827
 828         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 829         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 830
 831         Mem_Free(data2);
 832         Mem_Free(data);
 833         return rt;
 834 }
 835
 836 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
 837 {
 838         qboolean ret;
 839         unsigned char *out;
 840         const unsigned char *in, *end;
 841
 842         memset (buffer, 0, 18);
 843         buffer[2] = 2;          // uncompressed type
 844         buffer[12] = (width >> 0) & 0xFF;
 845         buffer[13] = (width >> 8) & 0xFF;
 846         buffer[14] = (height >> 0) & 0xFF;
 847         buffer[15] = (height >> 8) & 0xFF;
 848         buffer[16] = 24;        // pixel size
 849
 850         // swap rgb to bgr
 851         in = data;
 852         out = buffer + 18;
 853         end = in + width*height*3;
 854         for (;in < end;in += 3)
 855         {
 856                 *out++ = in[2];
 857                 *out++ = in[1];
 858                 *out++ = in[0];
 859         }
 860         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 861
 862         return ret;
 863 }
 864
 865 void Image_WriteTGARGB (const char *filename, int width, int height, const unsigned char *data)
 866 {
 867         int y;
 868         unsigned char *buffer, *out;
 869         const unsigned char *in, *end;
 870
 871         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*3 + 18);
 872
 873         memset (buffer, 0, 18);
 874         buffer[2] = 2;          // uncompressed type
 875         buffer[12] = (width >> 0) & 0xFF;
 876         buffer[13] = (width >> 8) & 0xFF;
 877         buffer[14] = (height >> 0) & 0xFF;
 878         buffer[15] = (height >> 8) & 0xFF;
 879         buffer[16] = 24;        // pixel size
 880
 881         // swap rgb to bgr and flip upside down
 882         out = buffer + 18;
 883         for (y = height - 1;y >= 0;y--)
 884         {
 885                 in = data + y * width * 3;
 886                 end = in + width * 3;
 887                 for (;in < end;in += 3)
 888                 {
 889                         *out++ = in[2];
 890                         *out++ = in[1];
 891                         *out++ = in[0];
 892                 }
 893         }
 894         FS_WriteFile (filename, buffer, width*height*3 + 18 );
 895
 896         Mem_Free(buffer);
 897 }
 898
 899 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
 900 {
 901         int y;
 902         unsigned char *buffer, *out;
 903         const unsigned char *in, *end;
 904
 905         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
 906
 907         memset (buffer, 0, 18);
 908         buffer[2] = 2;          // uncompressed type
 909         buffer[12] = (width >> 0) & 0xFF;
 910         buffer[13] = (width >> 8) & 0xFF;
 911         buffer[14] = (height >> 0) & 0xFF;
 912         buffer[15] = (height >> 8) & 0xFF;
 913         buffer[16] = 32;        // pixel size
 914         buffer[17] = 8; // transparent flag? (seems to be needed by gimp)
 915
 916         // swap rgba to bgra and flip upside down
 917         out = buffer + 18;
 918         for (y = height - 1;y >= 0;y--)
 919         {
 920                 in = data + y * width * 4;
 921                 end = in + width * 4;
 922                 for (;in < end;in += 4)
 923                 {
 924                         *out++ = in[2];
 925                         *out++ = in[1];
 926                         *out++ = in[0];
 927                         *out++ = in[3];
 928                 }
 929         }
 930         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 931
 932         Mem_Free(buffer);
 933 }
 934
 935 qboolean Image_CheckAlpha(const unsigned char *data, int size, qboolean rgba)
 936 {
 937         const unsigned char *end;
 938         if (rgba)
 939         {
 940                 // check alpha bytes
 941                 for (end = data + size * 4, data += 3;data < end;data += 4)
 942                         if (*data < 255)
 943                                 return 1;
 944         }
 945         else
 946         {
 947                 // color 255 is transparent
 948                 for (end = data + size;data < end;data++)
 949                         if (*data == 255)
 950                                 return 1;
 951         }
 952         return 0;
 953 }
 954
 955 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 956 {
 957         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 958         fstep = (int) (inwidth*65536.0f/outwidth);
 959         endx = (inwidth-1);
 960         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 961         {
 962                 xi = f >> 16;
 963                 if (xi != oldx)
 964                 {
 965                         in += (xi - oldx) * 4;
 966                         oldx = xi;
 967                 }
 968                 if (xi < endx)
 969                 {
 970                         lerp = f & 0xFFFF;
 971                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 972                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 973                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 974                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 975                 }
 976                 else // last pixel of the line has no pixel to lerp to
 977                 {
 978                         *out++ = in[0];
 979                         *out++ = in[1];
 980                         *out++ = in[2];
 981                         *out++ = in[3];
 982                 }
 983         }
 984 }
 985
 986 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 987 {
 988         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 989         fstep = (int) (inwidth*65536.0f/outwidth);
 990         endx = (inwidth-1);
 991         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 992         {
 993                 xi = f >> 16;
 994                 if (xi != oldx)
 995                 {
 996                         in += (xi - oldx) * 3;
 997                         oldx = xi;
 998                 }
 999                 if (xi < endx)
1000                 {
1001                         lerp = f & 0xFFFF;
1002                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1003                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1004                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1005                 }
1006                 else // last pixel of the line has no pixel to lerp to
1007                 {
1008                         *out++ = in[0];
1009                         *out++ = in[1];
1010                         *out++ = in[2];
1011                 }
1012         }
1013 }
1014
1015 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1016 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1017 {
1018         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1019         unsigned char *out;
1020         const unsigned char *inrow;
1021         unsigned char *resamplerow1;
1022         unsigned char *resamplerow2;
1023         out = (unsigned char *)outdata;
1024         fstep = (int) (inheight*65536.0f/outheight);
1025
1026         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1027         resamplerow2 = resamplerow1 + outwidth*4;
1028
1029         inrow = (const unsigned char *)indata;
1030         oldy = 0;
1031         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1032         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1033         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1034         {
1035                 yi = f >> 16;
1036                 if (yi < endy)
1037                 {
1038                         lerp = f & 0xFFFF;
1039                         if (yi != oldy)
1040                         {
1041                                 inrow = (unsigned char *)indata + inwidth4*yi;
1042                                 if (yi == oldy+1)
1043                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1044                                 else
1045                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1046                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1047                                 oldy = yi;
1048                         }
1049                         j = outwidth - 4;
1050                         while(j >= 0)
1051                         {
1052                                 LERPBYTE( 0);
1053                                 LERPBYTE( 1);
1054                                 LERPBYTE( 2);
1055                                 LERPBYTE( 3);
1056                                 LERPBYTE( 4);
1057                                 LERPBYTE( 5);
1058                                 LERPBYTE( 6);
1059                                 LERPBYTE( 7);
1060                                 LERPBYTE( 8);
1061                                 LERPBYTE( 9);
1062                                 LERPBYTE(10);
1063                                 LERPBYTE(11);
1064                                 LERPBYTE(12);
1065                                 LERPBYTE(13);
1066                                 LERPBYTE(14);
1067                                 LERPBYTE(15);
1068                                 out += 16;
1069                                 resamplerow1 += 16;
1070                                 resamplerow2 += 16;
1071                                 j -= 4;
1072                         }
1073                         if (j & 2)
1074                         {
1075                                 LERPBYTE( 0);
1076                                 LERPBYTE( 1);
1077                                 LERPBYTE( 2);
1078                                 LERPBYTE( 3);
1079                                 LERPBYTE( 4);
1080                                 LERPBYTE( 5);
1081                                 LERPBYTE( 6);
1082                                 LERPBYTE( 7);
1083                                 out += 8;
1084                                 resamplerow1 += 8;
1085                                 resamplerow2 += 8;
1086                         }
1087                         if (j & 1)
1088                         {
1089                                 LERPBYTE( 0);
1090                                 LERPBYTE( 1);
1091                                 LERPBYTE( 2);
1092                                 LERPBYTE( 3);
1093                                 out += 4;
1094                                 resamplerow1 += 4;
1095                                 resamplerow2 += 4;
1096                         }
1097                         resamplerow1 -= outwidth4;
1098                         resamplerow2 -= outwidth4;
1099                 }
1100                 else
1101                 {
1102                         if (yi != oldy)
1103                         {
1104                                 inrow = (unsigned char *)indata + inwidth4*yi;
1105                                 if (yi == oldy+1)
1106                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1107                                 else
1108                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1109                                 oldy = yi;
1110                         }
1111                         memcpy(out, resamplerow1, outwidth4);
1112                 }
1113         }
1114
1115         Mem_Free(resamplerow1);
1116         resamplerow1 = NULL;
1117         resamplerow2 = NULL;
1118 }
1119
1120 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1121 {
1122         int i, j;
1123         unsigned frac, fracstep;
1124         // relies on int being 4 bytes
1125         int *inrow, *out;
1126         out = (int *)outdata;
1127
1128         fracstep = inwidth*0x10000/outwidth;
1129         for (i = 0;i < outheight;i++)
1130         {
1131                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1132                 frac = fracstep >> 1;
1133                 j = outwidth - 4;
1134                 while (j >= 0)
1135                 {
1136                         out[0] = inrow[frac >> 16];frac += fracstep;
1137                         out[1] = inrow[frac >> 16];frac += fracstep;
1138                         out[2] = inrow[frac >> 16];frac += fracstep;
1139                         out[3] = inrow[frac >> 16];frac += fracstep;
1140                         out += 4;
1141                         j -= 4;
1142                 }
1143                 if (j & 2)
1144                 {
1145                         out[0] = inrow[frac >> 16];frac += fracstep;
1146                         out[1] = inrow[frac >> 16];frac += fracstep;
1147                         out += 2;
1148                 }
1149                 if (j & 1)
1150                 {
1151                         out[0] = inrow[frac >> 16];frac += fracstep;
1152                         out += 1;
1153                 }
1154         }
1155 }
1156
1157 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1158 {
1159         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1160         unsigned char *out;
1161         const unsigned char *inrow;
1162         unsigned char *resamplerow1;
1163         unsigned char *resamplerow2;
1164         out = (unsigned char *)outdata;
1165         fstep = (int) (inheight*65536.0f/outheight);
1166
1167         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1168         resamplerow2 = resamplerow1 + outwidth*3;
1169
1170         inrow = (const unsigned char *)indata;
1171         oldy = 0;
1172         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1173         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1174         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1175         {
1176                 yi = f >> 16;
1177                 if (yi < endy)
1178                 {
1179                         lerp = f & 0xFFFF;
1180                         if (yi != oldy)
1181                         {
1182                                 inrow = (unsigned char *)indata + inwidth3*yi;
1183                                 if (yi == oldy+1)
1184                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1185                                 else
1186                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1187                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1188                                 oldy = yi;
1189                         }
1190                         j = outwidth - 4;
1191                         while(j >= 0)
1192                         {
1193                                 LERPBYTE( 0);
1194                                 LERPBYTE( 1);
1195                                 LERPBYTE( 2);
1196                                 LERPBYTE( 3);
1197                                 LERPBYTE( 4);
1198                                 LERPBYTE( 5);
1199                                 LERPBYTE( 6);
1200                                 LERPBYTE( 7);
1201                                 LERPBYTE( 8);
1202                                 LERPBYTE( 9);
1203                                 LERPBYTE(10);
1204                                 LERPBYTE(11);
1205                                 out += 12;
1206                                 resamplerow1 += 12;
1207                                 resamplerow2 += 12;
1208                                 j -= 4;
1209                         }
1210                         if (j & 2)
1211                         {
1212                                 LERPBYTE( 0);
1213                                 LERPBYTE( 1);
1214                                 LERPBYTE( 2);
1215                                 LERPBYTE( 3);
1216                                 LERPBYTE( 4);
1217                                 LERPBYTE( 5);
1218                                 out += 6;
1219                                 resamplerow1 += 6;
1220                                 resamplerow2 += 6;
1221                         }
1222                         if (j & 1)
1223                         {
1224                                 LERPBYTE( 0);
1225                                 LERPBYTE( 1);
1226                                 LERPBYTE( 2);
1227                                 out += 3;
1228                                 resamplerow1 += 3;
1229                                 resamplerow2 += 3;
1230                         }
1231                         resamplerow1 -= outwidth3;
1232                         resamplerow2 -= outwidth3;
1233                 }
1234                 else
1235                 {
1236                         if (yi != oldy)
1237                         {
1238                                 inrow = (unsigned char *)indata + inwidth3*yi;
1239                                 if (yi == oldy+1)
1240                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1241                                 else
1242                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1243                                 oldy = yi;
1244                         }
1245                         memcpy(out, resamplerow1, outwidth3);
1246                 }
1247         }
1248         Mem_Free(resamplerow1);
1249         resamplerow1 = NULL;
1250         resamplerow2 = NULL;
1251 }
1252
1253 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1254 {
1255         int i, j, f, inwidth3 = inwidth * 3;
1256         unsigned frac, fracstep;
1257         unsigned char *inrow, *out;
1258         out = (unsigned char *)outdata;
1259
1260         fracstep = inwidth*0x10000/outwidth;
1261         for (i = 0;i < outheight;i++)
1262         {
1263                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1264                 frac = fracstep >> 1;
1265                 j = outwidth - 4;
1266                 while (j >= 0)
1267                 {
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                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1272                         j -= 4;
1273                 }
1274                 if (j & 2)
1275                 {
1276                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1277                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1278                         out += 2;
1279                 }
1280                 if (j & 1)
1281                 {
1282                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1283                         out += 1;
1284                 }
1285         }
1286 }
1287
1288 /*
1289 ================
1290 Image_Resample
1291 ================
1292 */
1293 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1294 {
1295         if (indepth != 1 || outdepth != 1)
1296         {
1297                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1298                 return;
1299         }
1300         if (bytesperpixel == 4)
1301         {
1302                 if (quality)
1303                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1304                 else
1305                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1306         }
1307         else if (bytesperpixel == 3)
1308         {
1309                 if (quality)
1310                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1311                 else
1312                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1313         }
1314         else
1315                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1316 }
1317
1318 // in can be the same as out
1319 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1320 {
1321         int x, y, nextrow;
1322         if (*depth != 1 || destdepth != 1)
1323         {
1324                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1325                 return;
1326         }
1327         nextrow = *width * bytesperpixel;
1328         if (*width > destwidth)
1329         {
1330                 *width >>= 1;
1331                 if (*height > destheight)
1332                 {
1333                         // reduce both
1334                         *height >>= 1;
1335                         if (bytesperpixel == 4)
1336                         {
1337                                 for (y = 0;y < *height;y++)
1338                                 {
1339                                         for (x = 0;x < *width;x++)
1340                                         {
1341                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1342                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1343                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1344                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1345                                                 out += 4;
1346                                                 in += 8;
1347                                         }
1348                                         in += nextrow; // skip a line
1349                                 }
1350                         }
1351                         else if (bytesperpixel == 3)
1352                         {
1353                                 for (y = 0;y < *height;y++)
1354                                 {
1355                                         for (x = 0;x < *width;x++)
1356                                         {
1357                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1358                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1359                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1360                                                 out += 3;
1361                                                 in += 6;
1362                                         }
1363                                         in += nextrow; // skip a line
1364                                 }
1365                         }
1366                         else
1367                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1368                 }
1369                 else
1370                 {
1371                         // reduce width
1372                         if (bytesperpixel == 4)
1373                         {
1374                                 for (y = 0;y < *height;y++)
1375                                 {
1376                                         for (x = 0;x < *width;x++)
1377                                         {
1378                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1379                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1380                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1381                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1382                                                 out += 4;
1383                                                 in += 8;
1384                                         }
1385                                 }
1386                         }
1387                         else if (bytesperpixel == 3)
1388                         {
1389                                 for (y = 0;y < *height;y++)
1390                                 {
1391                                         for (x = 0;x < *width;x++)
1392                                         {
1393                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1394                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1395                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1396                                                 out += 3;
1397                                                 in += 6;
1398                                         }
1399                                 }
1400                         }
1401                         else
1402                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1403                 }
1404         }
1405         else
1406         {
1407                 if (*height > destheight)
1408                 {
1409                         // reduce height
1410                         *height >>= 1;
1411                         if (bytesperpixel == 4)
1412                         {
1413                                 for (y = 0;y < *height;y++)
1414                                 {
1415                                         for (x = 0;x < *width;x++)
1416                                         {
1417                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1418                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1419                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1420                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1421                                                 out += 4;
1422                                                 in += 4;
1423                                         }
1424                                         in += nextrow; // skip a line
1425                                 }
1426                         }
1427                         else if (bytesperpixel == 3)
1428                         {
1429                                 for (y = 0;y < *height;y++)
1430                                 {
1431                                         for (x = 0;x < *width;x++)
1432                                         {
1433                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1434                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1435                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1436                                                 out += 3;
1437                                                 in += 3;
1438                                         }
1439                                         in += nextrow; // skip a line
1440                                 }
1441                         }
1442                         else
1443                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1444                 }
1445                 else
1446                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1447         }
1448 }
1449
1450 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1451 {
1452         int x, y;
1453         const unsigned char *p0, *p1, *p2;
1454         unsigned char *out;
1455         float iwidth, iheight, ibumpscale, n[3];
1456         iwidth = 1.0f / width;
1457         iheight = 1.0f / height;
1458         ibumpscale = (255.0f * 3.0f) / bumpscale;
1459         out = outpixels;
1460         for (y = 0;y < height;y++)
1461         {
1462                 for (x = 0;x < width;x++)
1463                 {
1464                         p0 = inpixels + (y * width + x) * 4;
1465                         if (x == width - 1)
1466                         {
1467                                 if (clamp)
1468                                         p1 = inpixels + (y * width + x) * 4;
1469                                 else
1470                                         p1 = inpixels + (y * width) * 4;
1471                         }
1472                         else
1473                                 p1 = inpixels + (y * width + x + 1) * 4;
1474                         if (y == height - 1)
1475                         {
1476                                 if (clamp)
1477                                         p2 = inpixels + (y * width + x) * 4;
1478                                 else
1479                                         p2 = inpixels + x * 4;
1480                         }
1481                         else
1482                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1483                         /*
1484                         dv[0][0] = iwidth;
1485                         dv[0][1] = 0;
1486                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1487                         dv[1][0] = 0;
1488                         dv[1][1] = iheight;
1489                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1490                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1491                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1492                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1493                         */
1494                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1495                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1496                         n[2] = ibumpscale;
1497                         VectorNormalize(n);
1498                         /*
1499                         // this should work for the bottom right triangle if anyone wants
1500                         // code for that for some reason
1501                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1502                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1503                         n[2] = ibumpscale;
1504                         VectorNormalize(n);
1505                         */
1506                         out[0] = 128.0f + n[0] * 127.0f;
1507                         out[1] = 128.0f + n[1] * 127.0f;
1508                         out[2] = 128.0f + n[2] * 127.0f;
1509                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1510                         out += 4;
1511                 }
1512         }
1513 }
1514
1515 int image_loadskin(imageskin_t *s, char *shadername)
1516 {
1517         int j;
1518         unsigned char *bumppixels;
1519         int bumppixels_width, bumppixels_height;
1520         char name[MAX_QPATH];
1521         strlcpy(name, shadername, sizeof(name));
1522         Image_StripImageExtension(name, name);
1523         memset(s, 0, sizeof(*s));
1524         s->basepixels = loadimagepixels(name, false, 0, 0);
1525         if (s->basepixels == NULL)
1526                 return false;
1527         s->basepixels_width = image_width;
1528         s->basepixels_height = image_height;
1529
1530         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1531         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1532         {
1533                 s->maskpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1534                 s->maskpixels_width = s->basepixels_width;
1535                 s->maskpixels_height = s->basepixels_height;
1536                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1537                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1538                 {
1539                         s->maskpixels[j+0] = 255;
1540                         s->maskpixels[j+1] = 255;
1541                         s->maskpixels[j+2] = 255;
1542                 }
1543         }
1544
1545         // _luma is supported for tenebrae compatibility
1546         // (I think it's a very stupid name, but oh well)
1547         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1548          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1549         {
1550                 s->glowpixels_width = image_width;
1551                 s->glowpixels_height = image_height;
1552         }
1553         // _norm is the name used by tenebrae
1554         // (I don't like the name much)
1555         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1556         {
1557                 s->nmappixels_width = image_width;
1558                 s->nmappixels_height = image_height;
1559         }
1560         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1561         {
1562                 bumppixels_width = image_width;
1563                 bumppixels_height = image_height;
1564         }
1565         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1566         {
1567                 s->glosspixels_width = image_width;
1568                 s->glosspixels_height = image_height;
1569         }
1570         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1571         {
1572                 s->pantspixels_width = image_width;
1573                 s->pantspixels_height = image_height;
1574         }
1575         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1576         {
1577                 s->shirtpixels_width = image_width;
1578                 s->shirtpixels_height = image_height;
1579         }
1580
1581         if (s->nmappixels == NULL)
1582         {
1583                 if (bumppixels != NULL)
1584                 {
1585                         if (r_shadow_bumpscale_bumpmap.value > 0)
1586                         {
1587                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1588                                 s->nmappixels_width = bumppixels_width;
1589                                 s->nmappixels_height = bumppixels_height;
1590                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1591                         }
1592                 }
1593                 else
1594                 {
1595                         if (r_shadow_bumpscale_basetexture.value > 0)
1596                         {
1597                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1598                                 s->nmappixels_width = s->basepixels_width;
1599                                 s->nmappixels_height = s->basepixels_height;
1600                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1601                         }
1602                 }
1603         }
1604         if (bumppixels != NULL)
1605                 Mem_Free(bumppixels);
1606         return true;
1607 }
1608
1609 void image_freeskin(imageskin_t *s)
1610 {
1611         if (s->basepixels)
1612                 Mem_Free(s->basepixels);
1613         if (s->maskpixels)
1614                 Mem_Free(s->maskpixels);
1615         if (s->nmappixels)
1616                 Mem_Free(s->nmappixels);
1617         if (s->glowpixels)
1618                 Mem_Free(s->glowpixels);
1619         if (s->glosspixels)
1620                 Mem_Free(s->glosspixels);
1621         if (s->pantspixels)
1622                 Mem_Free(s->pantspixels);
1623         if (s->shirtpixels)
1624                 Mem_Free(s->shirtpixels);
1625         memset(s, 0, sizeof(*s));
1626 }
1627