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_Print("TargaHeader:\n");
 293         Con_Printf("uint8 id_length = %i;\n", t->id_length);
 294         Con_Printf("uint8 colormap_type = %i;\n", t->colormap_type);
 295         Con_Printf("uint8 image_type = %i;\n", t->image_type);
 296         Con_Printf("uint16 colormap_index = %i;\n", t->colormap_index);
 297         Con_Printf("uint16 colormap_length = %i;\n", t->colormap_length);
 298         Con_Printf("uint8 colormap_size = %i;\n", t->colormap_size);
 299         Con_Printf("uint16 x_origin = %i;\n", t->x_origin);
 300         Con_Printf("uint16 y_origin = %i;\n", t->y_origin);
 301         Con_Printf("uint16 width = %i;\n", t->width);
 302         Con_Printf("uint16 height = %i;\n", t->height);
 303         Con_Printf("uint8 pixel_size = %i;\n", t->pixel_size);
 304         Con_Printf("uint8 attributes = %i;\n", t->attributes);
 305 }
 306
 307 /*
 308 =============
 309 LoadTGA
 310 =============
 311 */
 312 qbyte *LoadTGA (const qbyte *f, int matchwidth, int matchheight)
 313 {
 314         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex;
 315         qbyte *pixbuf, *image_rgba;
 316         const qbyte *fin, *enddata;
 317         TargaHeader targa_header;
 318         unsigned char palette[256*4], *p;
 319
 320         if (fs_filesize < 19)
 321                 return NULL;
 322
 323         enddata = f + fs_filesize;
 324
 325         targa_header.id_length = f[0];
 326         targa_header.colormap_type = f[1];
 327         targa_header.image_type = f[2];
 328
 329         targa_header.colormap_index = f[3] + f[4] * 256;
 330         targa_header.colormap_length = f[5] + f[6] * 256;
 331         targa_header.colormap_size = f[7];
 332         targa_header.x_origin = f[8] + f[9] * 256;
 333         targa_header.y_origin = f[10] + f[11] * 256;
 334         targa_header.width = image_width = f[12] + f[13] * 256;
 335         targa_header.height = image_height = f[14] + f[15] * 256;
 336         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 337         {
 338                 Con_Print("LoadTGA: invalid size\n");
 339                 PrintTargaHeader(&targa_header);
 340                 return NULL;
 341         }
 342         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 343                 return NULL;
 344         targa_header.pixel_size = f[16];
 345         targa_header.attributes = f[17];
 346
 347         fin = f + 18;
 348         if (targa_header.id_length != 0)
 349                 fin += targa_header.id_length;  // skip TARGA image comment
 350         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 351         {
 352                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 353                 {
 354                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 355                         PrintTargaHeader(&targa_header);
 356                         return NULL;
 357                 }
 358         }
 359         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 360         {
 361                 if (targa_header.pixel_size != 8)
 362                 {
 363                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 364                         PrintTargaHeader(&targa_header);
 365                         return NULL;
 366                 }
 367                 if (targa_header.colormap_length > 256)
 368                 {
 369                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 370                         PrintTargaHeader(&targa_header);
 371                         return NULL;
 372                 }
 373                 if (targa_header.colormap_index)
 374                 {
 375                         Con_Print("LoadTGA: colormap_index not supported\n");
 376                         PrintTargaHeader(&targa_header);
 377                         return NULL;
 378                 }
 379                 if (targa_header.colormap_size == 24)
 380                 {
 381                         for (x = 0;x < targa_header.colormap_length;x++)
 382                         {
 383                                 palette[x*4+2] = *fin++;
 384                                 palette[x*4+1] = *fin++;
 385                                 palette[x*4+0] = *fin++;
 386                                 palette[x*4+3] = 255;
 387                         }
 388                 }
 389                 else if (targa_header.colormap_size == 32)
 390                 {
 391                         for (x = 0;x < targa_header.colormap_length;x++)
 392                         {
 393                                 palette[x*4+2] = *fin++;
 394                                 palette[x*4+1] = *fin++;
 395                                 palette[x*4+0] = *fin++;
 396                                 palette[x*4+3] = *fin++;
 397                         }
 398                 }
 399                 else
 400                 {
 401                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 402                         PrintTargaHeader(&targa_header);
 403                         return NULL;
 404                 }
 405         }
 406         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
 407         {
 408                 if (targa_header.pixel_size != 8)
 409                 {
 410                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 411                         PrintTargaHeader(&targa_header);
 412                         return NULL;
 413                 }
 414         }
 415         else
 416         {
 417                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 418                 PrintTargaHeader(&targa_header);
 419                 return NULL;
 420         }
 421
 422         if (targa_header.attributes & 0x10)
 423         {
 424                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 425                 return NULL;
 426         }
 427
 428         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 429         if (!image_rgba)
 430         {
 431                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 432                 return NULL;
 433         }
 434
 435         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 436         if ((targa_header.attributes & 0x20) == 0)
 437         {
 438                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 439                 row_inc = -image_width*4*2;
 440         }
 441         else
 442         {
 443                 pixbuf = image_rgba;
 444                 row_inc = 0;
 445         }
 446
 447         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 448         x = 0;
 449         y = 0;
 450         red = green = blue = alpha = 255;
 451         while (y < image_height)
 452         {
 453                 // decoder is mostly the same whether it's compressed or not
 454                 readpixelcount = 1000000;
 455                 runlen = 1000000;
 456                 if (compressed && fin < enddata)
 457                 {
 458                         runlen = *fin++;
 459                         // high bit indicates this is an RLE compressed run
 460                         if (runlen & 0x80)
 461                                 readpixelcount = 1;
 462                         runlen = 1 + (runlen & 0x7f);
 463                 }
 464
 465                 while((runlen--) && y < image_height)
 466                 {
 467                         if (readpixelcount > 0)
 468                         {
 469                                 readpixelcount--;
 470                                 red = green = blue = alpha = 255;
 471                                 if (fin < enddata)
 472                                 {
 473                                         switch(targa_header.image_type)
 474                                         {
 475                                         case 1:
 476                                         case 9:
 477                                                 // colormapped
 478                                                 pindex = *fin++;
 479                                                 if (pindex >= targa_header.colormap_length)
 480                                                         pindex = 0; // error
 481                                                 p = palette + pindex * 4;
 482                                                 red = p[0];
 483                                                 green = p[1];
 484                                                 blue = p[2];
 485                                                 alpha = p[3];
 486                                                 break;
 487                                         case 2:
 488                                         case 10:
 489                                                 // BGR or BGRA
 490                                                 blue = *fin++;
 491                                                 if (fin < enddata)
 492                                                         green = *fin++;
 493                                                 if (fin < enddata)
 494                                                         red = *fin++;
 495                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 496                                                         alpha = *fin++;
 497                                                 break;
 498                                         case 3:
 499                                         case 11:
 500                                                 // greyscale
 501                                                 red = green = blue = *fin++;
 502                                                 break;
 503                                         }
 504                                 }
 505                         }
 506                         *pixbuf++ = red;
 507                         *pixbuf++ = green;
 508                         *pixbuf++ = blue;
 509                         *pixbuf++ = alpha;
 510                         x++;
 511                         if (x == image_width)
 512                         {
 513                                 // end of line, advance to next
 514                                 x = 0;
 515                                 y++;
 516                                 pixbuf += row_inc;
 517                         }
 518                 }
 519         }
 520
 521         return image_rgba;
 522 }
 523
 524 /*
 525 ============
 526 LoadLMP
 527 ============
 528 */
 529 qbyte *LoadLMP (const qbyte *f, int matchwidth, int matchheight, qboolean loadAs8Bit)
 530 {
 531         qbyte *image_buffer;
 532
 533         if (fs_filesize < 9)
 534         {
 535                 Con_Print("LoadLMP: invalid LMP file\n");
 536                 return NULL;
 537         }
 538
 539         // parse the very complicated header *chuckle*
 540         image_width = BuffLittleLong(f);
 541         image_height = BuffLittleLong(f + 4);
 542         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 543         {
 544                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 545                 return NULL;
 546         }
 547         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 548                 return NULL;
 549
 550         if (fs_filesize < 8 + image_width * image_height)
 551         {
 552                 Con_Print("LoadLMP: invalid LMP file\n");
 553                 return NULL;
 554         }
 555
 556         if (loadAs8Bit)
 557         {
 558                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height);
 559                 memcpy(image_buffer, f + 8, image_width * image_height);
 560         }
 561         else
 562         {
 563                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height * 4);
 564                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_complete);
 565         }
 566         return image_buffer;
 567 }
 568
 569 static qbyte *LoadLMPRGBA (const qbyte *f, int matchwidth, int matchheight)
 570 {
 571         return LoadLMP(f, matchwidth, matchheight, false);
 572 }
 573
 574
 575 typedef struct
 576 {
 577         char            name[32];
 578         unsigned        width, height;
 579         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 580         char            animname[32];                   // next frame in animation chain
 581         int                     flags;
 582         int                     contents;
 583         int                     value;
 584 } q2wal_t;
 585
 586 qbyte *LoadWAL (const qbyte *f, int matchwidth, int matchheight)
 587 {
 588         qbyte *image_rgba;
 589         const q2wal_t *inwal = (const void *)f;
 590
 591         if (fs_filesize < (int) sizeof(q2wal_t))
 592         {
 593                 Con_Print("LoadWAL: invalid WAL file\n");
 594                 return NULL;
 595         }
 596
 597         image_width = LittleLong(inwal->width);
 598         image_height = LittleLong(inwal->height);
 599         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 600         {
 601                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 602                 return NULL;
 603         }
 604         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 605                 return NULL;
 606
 607         if ((int) fs_filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 608         {
 609                 Con_Print("LoadWAL: invalid WAL file\n");
 610                 return NULL;
 611         }
 612
 613         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 614         if (!image_rgba)
 615         {
 616                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 617                 return NULL;
 618         }
 619         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 620         return image_rgba;
 621 }
 622
 623
 624 void Image_StripImageExtension (const char *in, char *out)
 625 {
 626         const char *end, *temp;
 627         end = in + strlen(in);
 628         if ((end - in) >= 4)
 629         {
 630                 temp = end - 4;
 631                 if (strcmp(temp, ".tga") == 0
 632                  || strcmp(temp, ".pcx") == 0
 633                  || strcmp(temp, ".lmp") == 0
 634                  || strcmp(temp, ".png") == 0
 635                  || strcmp(temp, ".jpg") == 0)
 636                         end = temp;
 637                 while (in < end)
 638                         *out++ = *in++;
 639                 *out++ = 0;
 640         }
 641         else
 642                 strcpy(out, in);
 643 }
 644
 645 struct
 646 {
 647         const char *formatstring;
 648         qbyte *(*loadfunc)(const qbyte *f, int matchwidth, int matchheight);
 649 }
 650 imageformats[] =
 651 {
 652         {"override/%s.tga", LoadTGA},
 653         {"override/%s.jpg", JPEG_LoadImage},
 654         {"textures/%s.tga", LoadTGA},
 655         {"textures/%s.jpg", JPEG_LoadImage},
 656         {"textures/%s.pcx", LoadPCX},
 657         {"textures/%s.wal", LoadWAL},
 658         {"%s.tga", LoadTGA},
 659         {"%s.jpg", JPEG_LoadImage},
 660         {"%s.pcx", LoadPCX},
 661         {"%s.lmp", LoadLMPRGBA},
 662         {NULL, NULL}
 663 };
 664
 665 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 666 {
 667         int i;
 668         qbyte *f, *data = NULL;
 669         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 670         if (developer_memorydebug.integer)
 671                 Mem_CheckSentinelsGlobal();
 672         Image_StripImageExtension(filename, basename); // strip filename extensions to allow replacement by other types
 673         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 674         for (c = basename;*c;c++)
 675                 if (*c == '*')
 676                         *c = '#';
 677         for (i = 0;imageformats[i].formatstring;i++)
 678         {
 679                 sprintf (name, imageformats[i].formatstring, basename);
 680                 f = FS_LoadFile(name, tempmempool, true);
 681                 if (f)
 682                 {
 683                         data = imageformats[i].loadfunc(f, matchwidth, matchheight);
 684                         Mem_Free(f);
 685                         if (data)
 686                         {
 687                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 688                                 if (developer_memorydebug.integer)
 689                                         Mem_CheckSentinelsGlobal();
 690                                 return data;
 691                         }
 692                 }
 693         }
 694         if (complain)
 695         {
 696                 Con_Printf("Couldn't load %s using ", filename);
 697                 for (i = 0;imageformats[i].formatstring;i++)
 698                 {
 699                         sprintf (name, imageformats[i].formatstring, basename);
 700                         Con_Printf(i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
 701                 }
 702         }
 703         if (developer_memorydebug.integer)
 704                 Mem_CheckSentinelsGlobal();
 705         return NULL;
 706 }
 707
 708 int image_makemask (const qbyte *in, qbyte *out, int size)
 709 {
 710         int i, count;
 711         count = 0;
 712         for (i = 0;i < size;i++)
 713         {
 714                 out[0] = out[1] = out[2] = 255;
 715                 out[3] = in[3];
 716                 if (in[3] != 255)
 717                         count++;
 718                 in += 4;
 719                 out += 4;
 720         }
 721         return count;
 722 }
 723
 724 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 725 {
 726         qbyte *in, *data;
 727         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 728         if (!data)
 729                 return NULL;
 730         if (image_makemask(data, data, image_width * image_height))
 731                 return data; // some transparency
 732         else
 733         {
 734                 Mem_Free(data);
 735                 return NULL; // all opaque
 736         }
 737 }
 738
 739 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 740 {
 741         qbyte *data;
 742         rtexture_t *rt;
 743         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 744                 return 0;
 745         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 746         Mem_Free(data);
 747         return rt;
 748 }
 749
 750 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 751 {
 752         qbyte *data;
 753         rtexture_t *rt;
 754         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
 755                 return 0;
 756         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 757         Mem_Free(data);
 758         return rt;
 759 }
 760
 761 rtexture_t *image_masktex;
 762 rtexture_t *image_nmaptex;
 763 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 764 {
 765         qbyte *data;
 766         rtexture_t *rt;
 767         image_masktex = NULL;
 768         image_nmaptex = NULL;
 769         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 770                 return 0;
 771
 772         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 773
 774         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 775                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 776
 777         Mem_Free(data);
 778         return rt;
 779 }
 780
 781 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 782 {
 783         qbyte *data, *data2;
 784         rtexture_t *rt;
 785         image_masktex = NULL;
 786         image_nmaptex = NULL;
 787         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 788                 return 0;
 789
 790         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 791
 792         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 793
 794         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 795         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 796
 797         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 798                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 799
 800         Mem_Free(data2);
 801
 802         Mem_Free(data);
 803         return rt;
 804 }
 805
 806 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 807 {
 808         qbyte *data, *data2;
 809         rtexture_t *rt;
 810         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 811                 return 0;
 812         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 813
 814         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 815         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 816
 817         Mem_Free(data2);
 818         Mem_Free(data);
 819         return rt;
 820 }
 821
 822 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data, qbyte *buffer)
 823 {
 824         qboolean ret;
 825         qbyte *out;
 826         const qbyte *in, *end;
 827
 828         memset (buffer, 0, 18);
 829         buffer[2] = 2;          // uncompressed type
 830         buffer[12] = (width >> 0) & 0xFF;
 831         buffer[13] = (width >> 8) & 0xFF;
 832         buffer[14] = (height >> 0) & 0xFF;
 833         buffer[15] = (height >> 8) & 0xFF;
 834         buffer[16] = 24;        // pixel size
 835
 836         // swap rgb to bgr
 837         in = data;
 838         out = buffer + 18;
 839         end = in + width*height*3;
 840         for (;in < end;in += 3)
 841         {
 842                 *out++ = in[2];
 843                 *out++ = in[1];
 844                 *out++ = in[0];
 845         }
 846         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 847
 848         return ret;
 849 }
 850
 851 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
 852 {
 853         int y;
 854         qbyte *buffer, *out;
 855         const qbyte *in, *end;
 856
 857         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 858
 859         memset (buffer, 0, 18);
 860         buffer[2] = 2;          // uncompressed type
 861         buffer[12] = (width >> 0) & 0xFF;
 862         buffer[13] = (width >> 8) & 0xFF;
 863         buffer[14] = (height >> 0) & 0xFF;
 864         buffer[15] = (height >> 8) & 0xFF;
 865         buffer[16] = 24;        // pixel size
 866
 867         // swap rgb to bgr and flip upside down
 868         out = buffer + 18;
 869         for (y = height - 1;y >= 0;y--)
 870         {
 871                 in = data + y * width * 3;
 872                 end = in + width * 3;
 873                 for (;in < end;in += 3)
 874                 {
 875                         *out++ = in[2];
 876                         *out++ = in[1];
 877                         *out++ = in[0];
 878                 }
 879         }
 880         FS_WriteFile (filename, buffer, width*height*3 + 18 );
 881
 882         Mem_Free(buffer);
 883 }
 884
 885 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
 886 {
 887         int y;
 888         qbyte *buffer, *out;
 889         const qbyte *in, *end;
 890
 891         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
 892
 893         memset (buffer, 0, 18);
 894         buffer[2] = 2;          // uncompressed type
 895         buffer[12] = (width >> 0) & 0xFF;
 896         buffer[13] = (width >> 8) & 0xFF;
 897         buffer[14] = (height >> 0) & 0xFF;
 898         buffer[15] = (height >> 8) & 0xFF;
 899         buffer[16] = 32;        // pixel size
 900         buffer[17] = 8; // transparent flag? (seems to be needed by gimp)
 901
 902         // swap rgba to bgra and flip upside down
 903         out = buffer + 18;
 904         for (y = height - 1;y >= 0;y--)
 905         {
 906                 in = data + y * width * 4;
 907                 end = in + width * 4;
 908                 for (;in < end;in += 4)
 909                 {
 910                         *out++ = in[2];
 911                         *out++ = in[1];
 912                         *out++ = in[0];
 913                         *out++ = in[3];
 914                 }
 915         }
 916         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 917
 918         Mem_Free(buffer);
 919 }
 920
 921 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
 922 {
 923         const qbyte *end;
 924         if (rgba)
 925         {
 926                 // check alpha bytes
 927                 for (end = data + size * 4, data += 3;data < end;data += 4)
 928                         if (*data < 255)
 929                                 return 1;
 930         }
 931         else
 932         {
 933                 // color 255 is transparent
 934                 for (end = data + size;data < end;data++)
 935                         if (*data == 255)
 936                                 return 1;
 937         }
 938         return 0;
 939 }
 940
 941 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 942 {
 943         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 944         fstep = (int) (inwidth*65536.0f/outwidth);
 945         endx = (inwidth-1);
 946         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 947         {
 948                 xi = f >> 16;
 949                 if (xi != oldx)
 950                 {
 951                         in += (xi - oldx) * 4;
 952                         oldx = xi;
 953                 }
 954                 if (xi < endx)
 955                 {
 956                         lerp = f & 0xFFFF;
 957                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 958                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 959                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 960                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 961                 }
 962                 else // last pixel of the line has no pixel to lerp to
 963                 {
 964                         *out++ = in[0];
 965                         *out++ = in[1];
 966                         *out++ = in[2];
 967                         *out++ = in[3];
 968                 }
 969         }
 970 }
 971
 972 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 973 {
 974         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 975         fstep = (int) (inwidth*65536.0f/outwidth);
 976         endx = (inwidth-1);
 977         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 978         {
 979                 xi = f >> 16;
 980                 if (xi != oldx)
 981                 {
 982                         in += (xi - oldx) * 3;
 983                         oldx = xi;
 984                 }
 985                 if (xi < endx)
 986                 {
 987                         lerp = f & 0xFFFF;
 988                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 989                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 990                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 991                 }
 992                 else // last pixel of the line has no pixel to lerp to
 993                 {
 994                         *out++ = in[0];
 995                         *out++ = in[1];
 996                         *out++ = in[2];
 997                 }
 998         }
 999 }
1000
1001 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1002 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1003 {
1004         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1005         qbyte *out;
1006         const qbyte *inrow;
1007         qbyte *resamplerow1;
1008         qbyte *resamplerow2;
1009         out = outdata;
1010         fstep = (int) (inheight*65536.0f/outheight);
1011
1012         resamplerow1 = Mem_Alloc(tempmempool, outwidth*4*2);
1013         resamplerow2 = resamplerow1 + outwidth*4;
1014
1015         inrow = indata;
1016         oldy = 0;
1017         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1018         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1019         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1020         {
1021                 yi = f >> 16;
1022                 if (yi < endy)
1023                 {
1024                         lerp = f & 0xFFFF;
1025                         if (yi != oldy)
1026                         {
1027                                 inrow = (qbyte *)indata + inwidth4*yi;
1028                                 if (yi == oldy+1)
1029                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1030                                 else
1031                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1032                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1033                                 oldy = yi;
1034                         }
1035                         j = outwidth - 4;
1036                         while(j >= 0)
1037                         {
1038                                 LERPBYTE( 0);
1039                                 LERPBYTE( 1);
1040                                 LERPBYTE( 2);
1041                                 LERPBYTE( 3);
1042                                 LERPBYTE( 4);
1043                                 LERPBYTE( 5);
1044                                 LERPBYTE( 6);
1045                                 LERPBYTE( 7);
1046                                 LERPBYTE( 8);
1047                                 LERPBYTE( 9);
1048                                 LERPBYTE(10);
1049                                 LERPBYTE(11);
1050                                 LERPBYTE(12);
1051                                 LERPBYTE(13);
1052                                 LERPBYTE(14);
1053                                 LERPBYTE(15);
1054                                 out += 16;
1055                                 resamplerow1 += 16;
1056                                 resamplerow2 += 16;
1057                                 j -= 4;
1058                         }
1059                         if (j & 2)
1060                         {
1061                                 LERPBYTE( 0);
1062                                 LERPBYTE( 1);
1063                                 LERPBYTE( 2);
1064                                 LERPBYTE( 3);
1065                                 LERPBYTE( 4);
1066                                 LERPBYTE( 5);
1067                                 LERPBYTE( 6);
1068                                 LERPBYTE( 7);
1069                                 out += 8;
1070                                 resamplerow1 += 8;
1071                                 resamplerow2 += 8;
1072                         }
1073                         if (j & 1)
1074                         {
1075                                 LERPBYTE( 0);
1076                                 LERPBYTE( 1);
1077                                 LERPBYTE( 2);
1078                                 LERPBYTE( 3);
1079                                 out += 4;
1080                                 resamplerow1 += 4;
1081                                 resamplerow2 += 4;
1082                         }
1083                         resamplerow1 -= outwidth4;
1084                         resamplerow2 -= outwidth4;
1085                 }
1086                 else
1087                 {
1088                         if (yi != oldy)
1089                         {
1090                                 inrow = (qbyte *)indata + inwidth4*yi;
1091                                 if (yi == oldy+1)
1092                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1093                                 else
1094                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1095                                 oldy = yi;
1096                         }
1097                         memcpy(out, resamplerow1, outwidth4);
1098                 }
1099         }
1100
1101         Mem_Free(resamplerow1);
1102         resamplerow1 = NULL;
1103         resamplerow2 = NULL;
1104 }
1105
1106 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1107 {
1108         int i, j;
1109         unsigned frac, fracstep;
1110         // relies on int being 4 bytes
1111         int *inrow, *out;
1112         out = outdata;
1113
1114         fracstep = inwidth*0x10000/outwidth;
1115         for (i = 0;i < outheight;i++)
1116         {
1117                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1118                 frac = fracstep >> 1;
1119                 j = outwidth - 4;
1120                 while (j >= 0)
1121                 {
1122                         out[0] = inrow[frac >> 16];frac += fracstep;
1123                         out[1] = inrow[frac >> 16];frac += fracstep;
1124                         out[2] = inrow[frac >> 16];frac += fracstep;
1125                         out[3] = inrow[frac >> 16];frac += fracstep;
1126                         out += 4;
1127                         j -= 4;
1128                 }
1129                 if (j & 2)
1130                 {
1131                         out[0] = inrow[frac >> 16];frac += fracstep;
1132                         out[1] = inrow[frac >> 16];frac += fracstep;
1133                         out += 2;
1134                 }
1135                 if (j & 1)
1136                 {
1137                         out[0] = inrow[frac >> 16];frac += fracstep;
1138                         out += 1;
1139                 }
1140         }
1141 }
1142
1143 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1144 {
1145         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1146         qbyte *out;
1147         const qbyte *inrow;
1148         qbyte *resamplerow1;
1149         qbyte *resamplerow2;
1150         out = outdata;
1151         fstep = (int) (inheight*65536.0f/outheight);
1152
1153         resamplerow1 = Mem_Alloc(tempmempool, outwidth*3*2);
1154         resamplerow2 = resamplerow1 + outwidth*3;
1155
1156         inrow = indata;
1157         oldy = 0;
1158         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1159         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1160         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1161         {
1162                 yi = f >> 16;
1163                 if (yi < endy)
1164                 {
1165                         lerp = f & 0xFFFF;
1166                         if (yi != oldy)
1167                         {
1168                                 inrow = (qbyte *)indata + inwidth3*yi;
1169                                 if (yi == oldy+1)
1170                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1171                                 else
1172                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1173                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1174                                 oldy = yi;
1175                         }
1176                         j = outwidth - 4;
1177                         while(j >= 0)
1178                         {
1179                                 LERPBYTE( 0);
1180                                 LERPBYTE( 1);
1181                                 LERPBYTE( 2);
1182                                 LERPBYTE( 3);
1183                                 LERPBYTE( 4);
1184                                 LERPBYTE( 5);
1185                                 LERPBYTE( 6);
1186                                 LERPBYTE( 7);
1187                                 LERPBYTE( 8);
1188                                 LERPBYTE( 9);
1189                                 LERPBYTE(10);
1190                                 LERPBYTE(11);
1191                                 out += 12;
1192                                 resamplerow1 += 12;
1193                                 resamplerow2 += 12;
1194                                 j -= 4;
1195                         }
1196                         if (j & 2)
1197                         {
1198                                 LERPBYTE( 0);
1199                                 LERPBYTE( 1);
1200                                 LERPBYTE( 2);
1201                                 LERPBYTE( 3);
1202                                 LERPBYTE( 4);
1203                                 LERPBYTE( 5);
1204                                 out += 6;
1205                                 resamplerow1 += 6;
1206                                 resamplerow2 += 6;
1207                         }
1208                         if (j & 1)
1209                         {
1210                                 LERPBYTE( 0);
1211                                 LERPBYTE( 1);
1212                                 LERPBYTE( 2);
1213                                 out += 3;
1214                                 resamplerow1 += 3;
1215                                 resamplerow2 += 3;
1216                         }
1217                         resamplerow1 -= outwidth3;
1218                         resamplerow2 -= outwidth3;
1219                 }
1220                 else
1221                 {
1222                         if (yi != oldy)
1223                         {
1224                                 inrow = (qbyte *)indata + inwidth3*yi;
1225                                 if (yi == oldy+1)
1226                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1227                                 else
1228                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1229                                 oldy = yi;
1230                         }
1231                         memcpy(out, resamplerow1, outwidth3);
1232                 }
1233         }
1234         Mem_Free(resamplerow1);
1235         resamplerow1 = NULL;
1236         resamplerow2 = NULL;
1237 }
1238
1239 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1240 {
1241         int i, j, f, inwidth3 = inwidth * 3;
1242         unsigned frac, fracstep;
1243         qbyte *inrow, *out;
1244         out = outdata;
1245
1246         fracstep = inwidth*0x10000/outwidth;
1247         for (i = 0;i < outheight;i++)
1248         {
1249                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1250                 frac = fracstep >> 1;
1251                 j = outwidth - 4;
1252                 while (j >= 0)
1253                 {
1254                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1255                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1256                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1257                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1258                         j -= 4;
1259                 }
1260                 if (j & 2)
1261                 {
1262                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1263                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1264                         out += 2;
1265                 }
1266                 if (j & 1)
1267                 {
1268                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1269                         out += 1;
1270                 }
1271         }
1272 }
1273
1274 /*
1275 ================
1276 Image_Resample
1277 ================
1278 */
1279 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1280 {
1281         if (indepth != 1 || outdepth != 1)
1282                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1283         if (bytesperpixel == 4)
1284         {
1285                 if (quality)
1286                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1287                 else
1288                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1289         }
1290         else if (bytesperpixel == 3)
1291         {
1292                 if (quality)
1293                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1294                 else
1295                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1296         }
1297         else
1298                 Sys_Error("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1299 }
1300
1301 // in can be the same as out
1302 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1303 {
1304         int x, y, nextrow;
1305         if (*depth != 1 || destdepth != 1)
1306                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1307         nextrow = *width * bytesperpixel;
1308         if (*width > destwidth)
1309         {
1310                 *width >>= 1;
1311                 if (*height > destheight)
1312                 {
1313                         // reduce both
1314                         *height >>= 1;
1315                         if (bytesperpixel == 4)
1316                         {
1317                                 for (y = 0;y < *height;y++)
1318                                 {
1319                                         for (x = 0;x < *width;x++)
1320                                         {
1321                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1322                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1323                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1324                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1325                                                 out += 4;
1326                                                 in += 8;
1327                                         }
1328                                         in += nextrow; // skip a line
1329                                 }
1330                         }
1331                         else if (bytesperpixel == 3)
1332                         {
1333                                 for (y = 0;y < *height;y++)
1334                                 {
1335                                         for (x = 0;x < *width;x++)
1336                                         {
1337                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1338                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1339                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1340                                                 out += 3;
1341                                                 in += 6;
1342                                         }
1343                                         in += nextrow; // skip a line
1344                                 }
1345                         }
1346                         else
1347                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1348                 }
1349                 else
1350                 {
1351                         // reduce width
1352                         if (bytesperpixel == 4)
1353                         {
1354                                 for (y = 0;y < *height;y++)
1355                                 {
1356                                         for (x = 0;x < *width;x++)
1357                                         {
1358                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1359                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1360                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1361                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1362                                                 out += 4;
1363                                                 in += 8;
1364                                         }
1365                                 }
1366                         }
1367                         else if (bytesperpixel == 3)
1368                         {
1369                                 for (y = 0;y < *height;y++)
1370                                 {
1371                                         for (x = 0;x < *width;x++)
1372                                         {
1373                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1374                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1375                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1376                                                 out += 3;
1377                                                 in += 6;
1378                                         }
1379                                 }
1380                         }
1381                         else
1382                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1383                 }
1384         }
1385         else
1386         {
1387                 if (*height > destheight)
1388                 {
1389                         // reduce height
1390                         *height >>= 1;
1391                         if (bytesperpixel == 4)
1392                         {
1393                                 for (y = 0;y < *height;y++)
1394                                 {
1395                                         for (x = 0;x < *width;x++)
1396                                         {
1397                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1398                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1399                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1400                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1401                                                 out += 4;
1402                                                 in += 4;
1403                                         }
1404                                         in += nextrow; // skip a line
1405                                 }
1406                         }
1407                         else if (bytesperpixel == 3)
1408                         {
1409                                 for (y = 0;y < *height;y++)
1410                                 {
1411                                         for (x = 0;x < *width;x++)
1412                                         {
1413                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1414                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1415                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1416                                                 out += 3;
1417                                                 in += 3;
1418                                         }
1419                                         in += nextrow; // skip a line
1420                                 }
1421                         }
1422                         else
1423                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1424                 }
1425                 else
1426                         Sys_Error("Image_MipReduce: desired size already achieved\n");
1427         }
1428 }
1429
1430 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1431 {
1432         int x, y;
1433         const unsigned char *p0, *p1, *p2;
1434         unsigned char *out;
1435         float iwidth, iheight, ibumpscale, n[3];
1436         iwidth = 1.0f / width;
1437         iheight = 1.0f / height;
1438         ibumpscale = (255.0f * 3.0f) / bumpscale;
1439         out = outpixels;
1440         for (y = 0;y < height;y++)
1441         {
1442                 for (x = 0;x < width;x++)
1443                 {
1444                         p0 = inpixels + (y * width + x) * 4;
1445                         if (x == width - 1)
1446                         {
1447                                 if (clamp)
1448                                         p1 = inpixels + (y * width + x) * 4;
1449                                 else
1450                                         p1 = inpixels + (y * width) * 4;
1451                         }
1452                         else
1453                                 p1 = inpixels + (y * width + x + 1) * 4;
1454                         if (y == height - 1)
1455                         {
1456                                 if (clamp)
1457                                         p2 = inpixels + (y * width + x) * 4;
1458                                 else
1459                                         p2 = inpixels + x * 4;
1460                         }
1461                         else
1462                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1463                         /*
1464                         dv[0][0] = iwidth;
1465                         dv[0][1] = 0;
1466                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1467                         dv[1][0] = 0;
1468                         dv[1][1] = iheight;
1469                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1470                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1471                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1472                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1473                         */
1474                         n[0] = ((p1[0] + p1[1] + p1[2]) - (p0[0] + p0[1] + p0[2]));
1475                         n[1] = ((p0[0] + p0[1] + p0[2]) - (p2[0] + p2[1] + p2[2]));
1476                         n[2] = ibumpscale;
1477                         VectorNormalize(n);
1478                         /*
1479                         // this should work for the bottom right triangle if anyone wants
1480                         // code for that for some reason
1481                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1482                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1483                         n[2] = ibumpscale;
1484                         VectorNormalize(n);
1485                         */
1486                         out[0] = 128.0f + n[0] * 127.0f;
1487                         out[1] = 128.0f + n[1] * 127.0f;
1488                         out[2] = 128.0f + n[2] * 127.0f;
1489                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1490                         out += 4;
1491                 }
1492         }
1493 }
1494
1495 int image_loadskin(imageskin_t *s, char *shadername)
1496 {
1497         int j;
1498         qbyte *bumppixels;
1499         int bumppixels_width, bumppixels_height;
1500         char name[MAX_QPATH];
1501         Image_StripImageExtension(shadername, name);
1502         memset(s, 0, sizeof(*s));
1503         s->basepixels = loadimagepixels(name, false, 0, 0);
1504         if (s->basepixels == NULL)
1505                 return false;
1506         s->basepixels_width = image_width;
1507         s->basepixels_height = image_height;
1508
1509         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1510         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1511         {
1512                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1513                 s->maskpixels_width = s->basepixels_width;
1514                 s->maskpixels_height = s->basepixels_height;
1515                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1516                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1517                 {
1518                         s->maskpixels[j+0] = 255;
1519                         s->maskpixels[j+1] = 255;
1520                         s->maskpixels[j+2] = 255;
1521                 }
1522         }
1523
1524         // _luma is supported for tenebrae compatibility
1525         // (I think it's a very stupid name, but oh well)
1526         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1527          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1528         {
1529                 s->glowpixels_width = image_width;
1530                 s->glowpixels_height = image_height;
1531         }
1532         // _norm is the name used by tenebrae
1533         // (I don't like the name much)
1534         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1535         {
1536                 s->nmappixels_width = image_width;
1537                 s->nmappixels_height = image_height;
1538         }
1539         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1540         {
1541                 bumppixels_width = image_width;
1542                 bumppixels_height = image_height;
1543         }
1544         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1545         {
1546                 s->glosspixels_width = image_width;
1547                 s->glosspixels_height = image_height;
1548         }
1549         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1550         {
1551                 s->pantspixels_width = image_width;
1552                 s->pantspixels_height = image_height;
1553         }
1554         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1555         {
1556                 s->shirtpixels_width = image_width;
1557                 s->shirtpixels_height = image_height;
1558         }
1559
1560         if (s->nmappixels == NULL)
1561         {
1562                 if (bumppixels != NULL)
1563                 {
1564                         if (r_shadow_bumpscale_bumpmap.value > 0)
1565                         {
1566                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1567                                 s->nmappixels_width = bumppixels_width;
1568                                 s->nmappixels_height = bumppixels_height;
1569                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1570                         }
1571                 }
1572                 else
1573                 {
1574                         if (r_shadow_bumpscale_basetexture.value > 0)
1575                         {
1576                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1577                                 s->nmappixels_width = s->basepixels_width;
1578                                 s->nmappixels_height = s->basepixels_height;
1579                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1580                         }
1581                 }
1582         }
1583         if (bumppixels != NULL)
1584                 Mem_Free(bumppixels);
1585         return true;
1586 }
1587
1588 void image_freeskin(imageskin_t *s)
1589 {
1590         if (s->basepixels)
1591                 Mem_Free(s->basepixels);
1592         if (s->maskpixels)
1593                 Mem_Free(s->maskpixels);
1594         if (s->nmappixels)
1595                 Mem_Free(s->nmappixels);
1596         if (s->glowpixels)
1597                 Mem_Free(s->glowpixels);
1598         if (s->glosspixels)
1599                 Mem_Free(s->glosspixels);
1600         if (s->pantspixels)
1601                 Mem_Free(s->pantspixels);
1602         if (s->shirtpixels)
1603                 Mem_Free(s->shirtpixels);
1604         memset(s, 0, sizeof(*s));
1605 }
1606