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, alphabits;
 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         // advance to end of header
 348         fin = f + 18;
 349
 350         // skip TARGA image comment (usually 0 bytes)
 351         fin += targa_header.id_length;
 352
 353         // read/skip the colormap if present (note: according to the TARGA spec it
 354         // can be present even on truecolor or greyscale images, just not used by
 355         // the image data)
 356         if (targa_header.colormap_type)
 357         {
 358                 if (targa_header.colormap_length > 256)
 359                 {
 360                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 361                         PrintTargaHeader(&targa_header);
 362                         return NULL;
 363                 }
 364                 if (targa_header.colormap_index)
 365                 {
 366                         Con_Print("LoadTGA: colormap_index not supported\n");
 367                         PrintTargaHeader(&targa_header);
 368                         return NULL;
 369                 }
 370                 if (targa_header.colormap_size == 24)
 371                 {
 372                         for (x = 0;x < targa_header.colormap_length;x++)
 373                         {
 374                                 palette[x*4+2] = *fin++;
 375                                 palette[x*4+1] = *fin++;
 376                                 palette[x*4+0] = *fin++;
 377                                 palette[x*4+3] = 255;
 378                         }
 379                 }
 380                 else if (targa_header.colormap_size == 32)
 381                 {
 382                         for (x = 0;x < targa_header.colormap_length;x++)
 383                         {
 384                                 palette[x*4+2] = *fin++;
 385                                 palette[x*4+1] = *fin++;
 386                                 palette[x*4+0] = *fin++;
 387                                 palette[x*4+3] = *fin++;
 388                         }
 389                 }
 390                 else
 391                 {
 392                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 393                         PrintTargaHeader(&targa_header);
 394                         return NULL;
 395                 }
 396         }
 397
 398         // check our pixel_size restrictions according to image_type
 399         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 400         {
 401                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 402                 {
 403                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 404                         PrintTargaHeader(&targa_header);
 405                         return NULL;
 406                 }
 407         }
 408         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 409         {
 410                 if (targa_header.pixel_size != 8)
 411                 {
 412                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 413                         PrintTargaHeader(&targa_header);
 414                         return NULL;
 415                 }
 416         }
 417         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
 418         {
 419                 if (targa_header.pixel_size != 8)
 420                 {
 421                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 422                         PrintTargaHeader(&targa_header);
 423                         return NULL;
 424                 }
 425         }
 426         else
 427         {
 428                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 429                 PrintTargaHeader(&targa_header);
 430                 return NULL;
 431         }
 432
 433         if (targa_header.attributes & 0x10)
 434         {
 435                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 436                 return NULL;
 437         }
 438
 439         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 440         if (!image_rgba)
 441         {
 442                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 443                 return NULL;
 444         }
 445
 446         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 447         if ((targa_header.attributes & 0x20) == 0)
 448         {
 449                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 450                 row_inc = -image_width*4*2;
 451         }
 452         else
 453         {
 454                 pixbuf = image_rgba;
 455                 row_inc = 0;
 456         }
 457
 458         // number of attribute bits per pixel, we only support 0 or 8
 459         alphabits = targa_header.attributes & 0x0F;
 460         if (alphabits != 8 && alphabits != 0)
 461         {
 462                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
 463                 return NULL;
 464         }
 465
 466         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 467         x = 0;
 468         y = 0;
 469         red = green = blue = alpha = 255;
 470         while (y < image_height)
 471         {
 472                 // decoder is mostly the same whether it's compressed or not
 473                 readpixelcount = 1000000;
 474                 runlen = 1000000;
 475                 if (compressed && fin < enddata)
 476                 {
 477                         runlen = *fin++;
 478                         // high bit indicates this is an RLE compressed run
 479                         if (runlen & 0x80)
 480                                 readpixelcount = 1;
 481                         runlen = 1 + (runlen & 0x7f);
 482                 }
 483
 484                 while((runlen--) && y < image_height)
 485                 {
 486                         if (readpixelcount > 0)
 487                         {
 488                                 readpixelcount--;
 489                                 red = green = blue = alpha = 255;
 490                                 if (fin < enddata)
 491                                 {
 492                                         switch(targa_header.image_type)
 493                                         {
 494                                         case 1:
 495                                         case 9:
 496                                                 // colormapped
 497                                                 pindex = *fin++;
 498                                                 if (pindex >= targa_header.colormap_length)
 499                                                         pindex = 0; // error
 500                                                 p = palette + pindex * 4;
 501                                                 red = p[0];
 502                                                 green = p[1];
 503                                                 blue = p[2];
 504                                                 alpha = p[3];
 505                                                 break;
 506                                         case 2:
 507                                         case 10:
 508                                                 // BGR or BGRA
 509                                                 blue = *fin++;
 510                                                 if (fin < enddata)
 511                                                         green = *fin++;
 512                                                 if (fin < enddata)
 513                                                         red = *fin++;
 514                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 515                                                         alpha = *fin++;
 516                                                 break;
 517                                         case 3:
 518                                         case 11:
 519                                                 // greyscale
 520                                                 red = green = blue = *fin++;
 521                                                 break;
 522                                         }
 523                                         if (!alphabits)
 524                                                 alpha = 255;
 525                                 }
 526                         }
 527                         *pixbuf++ = red;
 528                         *pixbuf++ = green;
 529                         *pixbuf++ = blue;
 530                         *pixbuf++ = alpha;
 531                         x++;
 532                         if (x == image_width)
 533                         {
 534                                 // end of line, advance to next
 535                                 x = 0;
 536                                 y++;
 537                                 pixbuf += row_inc;
 538                         }
 539                 }
 540         }
 541
 542         return image_rgba;
 543 }
 544
 545 /*
 546 ============
 547 LoadLMP
 548 ============
 549 */
 550 qbyte *LoadLMP (const qbyte *f, int matchwidth, int matchheight, qboolean loadAs8Bit)
 551 {
 552         qbyte *image_buffer;
 553
 554         if (fs_filesize < 9)
 555         {
 556                 Con_Print("LoadLMP: invalid LMP file\n");
 557                 return NULL;
 558         }
 559
 560         // parse the very complicated header *chuckle*
 561         image_width = BuffLittleLong(f);
 562         image_height = BuffLittleLong(f + 4);
 563         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 564         {
 565                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 566                 return NULL;
 567         }
 568         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 569                 return NULL;
 570
 571         if (fs_filesize < (fs_offset_t)(8 + image_width * image_height))
 572         {
 573                 Con_Print("LoadLMP: invalid LMP file\n");
 574                 return NULL;
 575         }
 576
 577         if (loadAs8Bit)
 578         {
 579                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height);
 580                 memcpy(image_buffer, f + 8, image_width * image_height);
 581         }
 582         else
 583         {
 584                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height * 4);
 585                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_complete);
 586         }
 587         return image_buffer;
 588 }
 589
 590 static qbyte *LoadLMPRGBA (const qbyte *f, int matchwidth, int matchheight)
 591 {
 592         return LoadLMP(f, matchwidth, matchheight, false);
 593 }
 594
 595
 596 typedef struct
 597 {
 598         char            name[32];
 599         unsigned        width, height;
 600         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 601         char            animname[32];                   // next frame in animation chain
 602         int                     flags;
 603         int                     contents;
 604         int                     value;
 605 } q2wal_t;
 606
 607 qbyte *LoadWAL (const qbyte *f, int matchwidth, int matchheight)
 608 {
 609         qbyte *image_rgba;
 610         const q2wal_t *inwal = (const void *)f;
 611
 612         if (fs_filesize < (int) sizeof(q2wal_t))
 613         {
 614                 Con_Print("LoadWAL: invalid WAL file\n");
 615                 return NULL;
 616         }
 617
 618         image_width = LittleLong(inwal->width);
 619         image_height = LittleLong(inwal->height);
 620         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 621         {
 622                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 623                 return NULL;
 624         }
 625         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 626                 return NULL;
 627
 628         if ((int) fs_filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 629         {
 630                 Con_Print("LoadWAL: invalid WAL file\n");
 631                 return NULL;
 632         }
 633
 634         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 635         if (!image_rgba)
 636         {
 637                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 638                 return NULL;
 639         }
 640         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 641         return image_rgba;
 642 }
 643
 644
 645 void Image_StripImageExtension (const char *in, char *out)
 646 {
 647         const char *end, *temp;
 648         end = in + strlen(in);
 649         if ((end - in) >= 4)
 650         {
 651                 temp = end - 4;
 652                 if (strcmp(temp, ".tga") == 0
 653                  || strcmp(temp, ".pcx") == 0
 654                  || strcmp(temp, ".lmp") == 0
 655                  || strcmp(temp, ".png") == 0
 656                  || strcmp(temp, ".jpg") == 0)
 657                         end = temp;
 658                 while (in < end)
 659                         *out++ = *in++;
 660                 *out++ = 0;
 661         }
 662         else
 663                 strcpy(out, in);
 664 }
 665
 666 struct
 667 {
 668         const char *formatstring;
 669         qbyte *(*loadfunc)(const qbyte *f, int matchwidth, int matchheight);
 670 }
 671 imageformats[] =
 672 {
 673         {"override/%s.tga", LoadTGA},
 674         {"override/%s.jpg", JPEG_LoadImage},
 675         {"textures/%s.tga", LoadTGA},
 676         {"textures/%s.jpg", JPEG_LoadImage},
 677         {"textures/%s.pcx", LoadPCX},
 678         {"textures/%s.wal", LoadWAL},
 679         {"%s.tga", LoadTGA},
 680         {"%s.jpg", JPEG_LoadImage},
 681         {"%s.pcx", LoadPCX},
 682         {"%s.lmp", LoadLMPRGBA},
 683         {NULL, NULL}
 684 };
 685
 686 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 687 {
 688         int i;
 689         qbyte *f, *data = NULL;
 690         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 691         if (developer_memorydebug.integer)
 692                 Mem_CheckSentinelsGlobal();
 693         if (developer_texturelogging.integer)
 694                 Log_Printf("textures.log", "%s\n", filename);
 695         strlcpy(basename, filename, sizeof(basename));
 696         Image_StripImageExtension(basename, basename); // strip filename extensions to allow replacement by other types
 697         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 698         for (c = basename;*c;c++)
 699                 if (*c == '*')
 700                         *c = '#';
 701         for (i = 0;imageformats[i].formatstring;i++)
 702         {
 703                 sprintf (name, imageformats[i].formatstring, basename);
 704                 f = FS_LoadFile(name, tempmempool, true);
 705                 if (f)
 706                 {
 707                         data = imageformats[i].loadfunc(f, matchwidth, matchheight);
 708                         Mem_Free(f);
 709                         if (data)
 710                         {
 711                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 712                                 if (developer_memorydebug.integer)
 713                                         Mem_CheckSentinelsGlobal();
 714                                 return data;
 715                         }
 716                 }
 717         }
 718         if (complain)
 719         {
 720                 Con_Printf("Couldn't load %s using ", filename);
 721                 for (i = 0;imageformats[i].formatstring;i++)
 722                 {
 723                         sprintf (name, imageformats[i].formatstring, basename);
 724                         Con_Printf(i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
 725                 }
 726         }
 727         if (developer_memorydebug.integer)
 728                 Mem_CheckSentinelsGlobal();
 729         return NULL;
 730 }
 731
 732 int image_makemask (const qbyte *in, qbyte *out, int size)
 733 {
 734         int i, count;
 735         count = 0;
 736         for (i = 0;i < size;i++)
 737         {
 738                 out[0] = out[1] = out[2] = 255;
 739                 out[3] = in[3];
 740                 if (in[3] != 255)
 741                         count++;
 742                 in += 4;
 743                 out += 4;
 744         }
 745         return count;
 746 }
 747
 748 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 749 {
 750         qbyte *in, *data;
 751         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 752         if (!data)
 753                 return NULL;
 754         if (image_makemask(data, data, image_width * image_height))
 755                 return data; // some transparency
 756         else
 757         {
 758                 Mem_Free(data);
 759                 return NULL; // all opaque
 760         }
 761 }
 762
 763 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 764 {
 765         qbyte *data;
 766         rtexture_t *rt;
 767         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 768                 return 0;
 769         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 770         Mem_Free(data);
 771         return rt;
 772 }
 773
 774 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 775 {
 776         qbyte *data;
 777         rtexture_t *rt;
 778         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
 779                 return 0;
 780         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 781         Mem_Free(data);
 782         return rt;
 783 }
 784
 785 rtexture_t *image_masktex;
 786 rtexture_t *image_nmaptex;
 787 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 788 {
 789         qbyte *data;
 790         rtexture_t *rt;
 791         image_masktex = NULL;
 792         image_nmaptex = NULL;
 793         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 794                 return 0;
 795
 796         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 797
 798         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 799                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 800
 801         Mem_Free(data);
 802         return rt;
 803 }
 804
 805 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 806 {
 807         qbyte *data, *data2;
 808         rtexture_t *rt;
 809         image_masktex = NULL;
 810         image_nmaptex = NULL;
 811         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 812                 return 0;
 813
 814         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 815
 816         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 817
 818         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 819         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 820
 821         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 822                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 823
 824         Mem_Free(data2);
 825
 826         Mem_Free(data);
 827         return rt;
 828 }
 829
 830 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 831 {
 832         qbyte *data, *data2;
 833         rtexture_t *rt;
 834         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 835                 return 0;
 836         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 837
 838         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 839         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 840
 841         Mem_Free(data2);
 842         Mem_Free(data);
 843         return rt;
 844 }
 845
 846 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data, qbyte *buffer)
 847 {
 848         qboolean ret;
 849         qbyte *out;
 850         const qbyte *in, *end;
 851
 852         memset (buffer, 0, 18);
 853         buffer[2] = 2;          // uncompressed type
 854         buffer[12] = (width >> 0) & 0xFF;
 855         buffer[13] = (width >> 8) & 0xFF;
 856         buffer[14] = (height >> 0) & 0xFF;
 857         buffer[15] = (height >> 8) & 0xFF;
 858         buffer[16] = 24;        // pixel size
 859
 860         // swap rgb to bgr
 861         in = data;
 862         out = buffer + 18;
 863         end = in + width*height*3;
 864         for (;in < end;in += 3)
 865         {
 866                 *out++ = in[2];
 867                 *out++ = in[1];
 868                 *out++ = in[0];
 869         }
 870         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 871
 872         return ret;
 873 }
 874
 875 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
 876 {
 877         int y;
 878         qbyte *buffer, *out;
 879         const qbyte *in, *end;
 880
 881         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 882
 883         memset (buffer, 0, 18);
 884         buffer[2] = 2;          // uncompressed type
 885         buffer[12] = (width >> 0) & 0xFF;
 886         buffer[13] = (width >> 8) & 0xFF;
 887         buffer[14] = (height >> 0) & 0xFF;
 888         buffer[15] = (height >> 8) & 0xFF;
 889         buffer[16] = 24;        // pixel size
 890
 891         // swap rgb to bgr and flip upside down
 892         out = buffer + 18;
 893         for (y = height - 1;y >= 0;y--)
 894         {
 895                 in = data + y * width * 3;
 896                 end = in + width * 3;
 897                 for (;in < end;in += 3)
 898                 {
 899                         *out++ = in[2];
 900                         *out++ = in[1];
 901                         *out++ = in[0];
 902                 }
 903         }
 904         FS_WriteFile (filename, buffer, width*height*3 + 18 );
 905
 906         Mem_Free(buffer);
 907 }
 908
 909 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
 910 {
 911         int y;
 912         qbyte *buffer, *out;
 913         const qbyte *in, *end;
 914
 915         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
 916
 917         memset (buffer, 0, 18);
 918         buffer[2] = 2;          // uncompressed type
 919         buffer[12] = (width >> 0) & 0xFF;
 920         buffer[13] = (width >> 8) & 0xFF;
 921         buffer[14] = (height >> 0) & 0xFF;
 922         buffer[15] = (height >> 8) & 0xFF;
 923         buffer[16] = 32;        // pixel size
 924         buffer[17] = 8; // transparent flag? (seems to be needed by gimp)
 925
 926         // swap rgba to bgra and flip upside down
 927         out = buffer + 18;
 928         for (y = height - 1;y >= 0;y--)
 929         {
 930                 in = data + y * width * 4;
 931                 end = in + width * 4;
 932                 for (;in < end;in += 4)
 933                 {
 934                         *out++ = in[2];
 935                         *out++ = in[1];
 936                         *out++ = in[0];
 937                         *out++ = in[3];
 938                 }
 939         }
 940         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 941
 942         Mem_Free(buffer);
 943 }
 944
 945 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
 946 {
 947         const qbyte *end;
 948         if (rgba)
 949         {
 950                 // check alpha bytes
 951                 for (end = data + size * 4, data += 3;data < end;data += 4)
 952                         if (*data < 255)
 953                                 return 1;
 954         }
 955         else
 956         {
 957                 // color 255 is transparent
 958                 for (end = data + size;data < end;data++)
 959                         if (*data == 255)
 960                                 return 1;
 961         }
 962         return 0;
 963 }
 964
 965 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 966 {
 967         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 968         fstep = (int) (inwidth*65536.0f/outwidth);
 969         endx = (inwidth-1);
 970         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 971         {
 972                 xi = f >> 16;
 973                 if (xi != oldx)
 974                 {
 975                         in += (xi - oldx) * 4;
 976                         oldx = xi;
 977                 }
 978                 if (xi < endx)
 979                 {
 980                         lerp = f & 0xFFFF;
 981                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 982                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 983                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 984                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 985                 }
 986                 else // last pixel of the line has no pixel to lerp to
 987                 {
 988                         *out++ = in[0];
 989                         *out++ = in[1];
 990                         *out++ = in[2];
 991                         *out++ = in[3];
 992                 }
 993         }
 994 }
 995
 996 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 997 {
 998         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 999         fstep = (int) (inwidth*65536.0f/outwidth);
1000         endx = (inwidth-1);
1001         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1002         {
1003                 xi = f >> 16;
1004                 if (xi != oldx)
1005                 {
1006                         in += (xi - oldx) * 3;
1007                         oldx = xi;
1008                 }
1009                 if (xi < endx)
1010                 {
1011                         lerp = f & 0xFFFF;
1012                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1013                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1014                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1015                 }
1016                 else // last pixel of the line has no pixel to lerp to
1017                 {
1018                         *out++ = in[0];
1019                         *out++ = in[1];
1020                         *out++ = in[2];
1021                 }
1022         }
1023 }
1024
1025 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1026 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1027 {
1028         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1029         qbyte *out;
1030         const qbyte *inrow;
1031         qbyte *resamplerow1;
1032         qbyte *resamplerow2;
1033         out = outdata;
1034         fstep = (int) (inheight*65536.0f/outheight);
1035
1036         resamplerow1 = Mem_Alloc(tempmempool, outwidth*4*2);
1037         resamplerow2 = resamplerow1 + outwidth*4;
1038
1039         inrow = indata;
1040         oldy = 0;
1041         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1042         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1043         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1044         {
1045                 yi = f >> 16;
1046                 if (yi < endy)
1047                 {
1048                         lerp = f & 0xFFFF;
1049                         if (yi != oldy)
1050                         {
1051                                 inrow = (qbyte *)indata + inwidth4*yi;
1052                                 if (yi == oldy+1)
1053                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1054                                 else
1055                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1056                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1057                                 oldy = yi;
1058                         }
1059                         j = outwidth - 4;
1060                         while(j >= 0)
1061                         {
1062                                 LERPBYTE( 0);
1063                                 LERPBYTE( 1);
1064                                 LERPBYTE( 2);
1065                                 LERPBYTE( 3);
1066                                 LERPBYTE( 4);
1067                                 LERPBYTE( 5);
1068                                 LERPBYTE( 6);
1069                                 LERPBYTE( 7);
1070                                 LERPBYTE( 8);
1071                                 LERPBYTE( 9);
1072                                 LERPBYTE(10);
1073                                 LERPBYTE(11);
1074                                 LERPBYTE(12);
1075                                 LERPBYTE(13);
1076                                 LERPBYTE(14);
1077                                 LERPBYTE(15);
1078                                 out += 16;
1079                                 resamplerow1 += 16;
1080                                 resamplerow2 += 16;
1081                                 j -= 4;
1082                         }
1083                         if (j & 2)
1084                         {
1085                                 LERPBYTE( 0);
1086                                 LERPBYTE( 1);
1087                                 LERPBYTE( 2);
1088                                 LERPBYTE( 3);
1089                                 LERPBYTE( 4);
1090                                 LERPBYTE( 5);
1091                                 LERPBYTE( 6);
1092                                 LERPBYTE( 7);
1093                                 out += 8;
1094                                 resamplerow1 += 8;
1095                                 resamplerow2 += 8;
1096                         }
1097                         if (j & 1)
1098                         {
1099                                 LERPBYTE( 0);
1100                                 LERPBYTE( 1);
1101                                 LERPBYTE( 2);
1102                                 LERPBYTE( 3);
1103                                 out += 4;
1104                                 resamplerow1 += 4;
1105                                 resamplerow2 += 4;
1106                         }
1107                         resamplerow1 -= outwidth4;
1108                         resamplerow2 -= outwidth4;
1109                 }
1110                 else
1111                 {
1112                         if (yi != oldy)
1113                         {
1114                                 inrow = (qbyte *)indata + inwidth4*yi;
1115                                 if (yi == oldy+1)
1116                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1117                                 else
1118                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1119                                 oldy = yi;
1120                         }
1121                         memcpy(out, resamplerow1, outwidth4);
1122                 }
1123         }
1124
1125         Mem_Free(resamplerow1);
1126         resamplerow1 = NULL;
1127         resamplerow2 = NULL;
1128 }
1129
1130 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1131 {
1132         int i, j;
1133         unsigned frac, fracstep;
1134         // relies on int being 4 bytes
1135         int *inrow, *out;
1136         out = outdata;
1137
1138         fracstep = inwidth*0x10000/outwidth;
1139         for (i = 0;i < outheight;i++)
1140         {
1141                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1142                 frac = fracstep >> 1;
1143                 j = outwidth - 4;
1144                 while (j >= 0)
1145                 {
1146                         out[0] = inrow[frac >> 16];frac += fracstep;
1147                         out[1] = inrow[frac >> 16];frac += fracstep;
1148                         out[2] = inrow[frac >> 16];frac += fracstep;
1149                         out[3] = inrow[frac >> 16];frac += fracstep;
1150                         out += 4;
1151                         j -= 4;
1152                 }
1153                 if (j & 2)
1154                 {
1155                         out[0] = inrow[frac >> 16];frac += fracstep;
1156                         out[1] = inrow[frac >> 16];frac += fracstep;
1157                         out += 2;
1158                 }
1159                 if (j & 1)
1160                 {
1161                         out[0] = inrow[frac >> 16];frac += fracstep;
1162                         out += 1;
1163                 }
1164         }
1165 }
1166
1167 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1168 {
1169         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1170         qbyte *out;
1171         const qbyte *inrow;
1172         qbyte *resamplerow1;
1173         qbyte *resamplerow2;
1174         out = outdata;
1175         fstep = (int) (inheight*65536.0f/outheight);
1176
1177         resamplerow1 = Mem_Alloc(tempmempool, outwidth*3*2);
1178         resamplerow2 = resamplerow1 + outwidth*3;
1179
1180         inrow = indata;
1181         oldy = 0;
1182         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1183         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1184         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1185         {
1186                 yi = f >> 16;
1187                 if (yi < endy)
1188                 {
1189                         lerp = f & 0xFFFF;
1190                         if (yi != oldy)
1191                         {
1192                                 inrow = (qbyte *)indata + inwidth3*yi;
1193                                 if (yi == oldy+1)
1194                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1195                                 else
1196                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1197                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1198                                 oldy = yi;
1199                         }
1200                         j = outwidth - 4;
1201                         while(j >= 0)
1202                         {
1203                                 LERPBYTE( 0);
1204                                 LERPBYTE( 1);
1205                                 LERPBYTE( 2);
1206                                 LERPBYTE( 3);
1207                                 LERPBYTE( 4);
1208                                 LERPBYTE( 5);
1209                                 LERPBYTE( 6);
1210                                 LERPBYTE( 7);
1211                                 LERPBYTE( 8);
1212                                 LERPBYTE( 9);
1213                                 LERPBYTE(10);
1214                                 LERPBYTE(11);
1215                                 out += 12;
1216                                 resamplerow1 += 12;
1217                                 resamplerow2 += 12;
1218                                 j -= 4;
1219                         }
1220                         if (j & 2)
1221                         {
1222                                 LERPBYTE( 0);
1223                                 LERPBYTE( 1);
1224                                 LERPBYTE( 2);
1225                                 LERPBYTE( 3);
1226                                 LERPBYTE( 4);
1227                                 LERPBYTE( 5);
1228                                 out += 6;
1229                                 resamplerow1 += 6;
1230                                 resamplerow2 += 6;
1231                         }
1232                         if (j & 1)
1233                         {
1234                                 LERPBYTE( 0);
1235                                 LERPBYTE( 1);
1236                                 LERPBYTE( 2);
1237                                 out += 3;
1238                                 resamplerow1 += 3;
1239                                 resamplerow2 += 3;
1240                         }
1241                         resamplerow1 -= outwidth3;
1242                         resamplerow2 -= outwidth3;
1243                 }
1244                 else
1245                 {
1246                         if (yi != oldy)
1247                         {
1248                                 inrow = (qbyte *)indata + inwidth3*yi;
1249                                 if (yi == oldy+1)
1250                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1251                                 else
1252                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1253                                 oldy = yi;
1254                         }
1255                         memcpy(out, resamplerow1, outwidth3);
1256                 }
1257         }
1258         Mem_Free(resamplerow1);
1259         resamplerow1 = NULL;
1260         resamplerow2 = NULL;
1261 }
1262
1263 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1264 {
1265         int i, j, f, inwidth3 = inwidth * 3;
1266         unsigned frac, fracstep;
1267         qbyte *inrow, *out;
1268         out = outdata;
1269
1270         fracstep = inwidth*0x10000/outwidth;
1271         for (i = 0;i < outheight;i++)
1272         {
1273                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1274                 frac = fracstep >> 1;
1275                 j = outwidth - 4;
1276                 while (j >= 0)
1277                 {
1278                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1279                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1280                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1281                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1282                         j -= 4;
1283                 }
1284                 if (j & 2)
1285                 {
1286                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1287                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1288                         out += 2;
1289                 }
1290                 if (j & 1)
1291                 {
1292                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1293                         out += 1;
1294                 }
1295         }
1296 }
1297
1298 /*
1299 ================
1300 Image_Resample
1301 ================
1302 */
1303 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1304 {
1305         if (indepth != 1 || outdepth != 1)
1306         {
1307                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1308                 return;
1309         }
1310         if (bytesperpixel == 4)
1311         {
1312                 if (quality)
1313                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1314                 else
1315                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1316         }
1317         else if (bytesperpixel == 3)
1318         {
1319                 if (quality)
1320                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1321                 else
1322                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1323         }
1324         else
1325                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1326 }
1327
1328 // in can be the same as out
1329 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1330 {
1331         int x, y, nextrow;
1332         if (*depth != 1 || destdepth != 1)
1333         {
1334                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1335                 return;
1336         }
1337         nextrow = *width * bytesperpixel;
1338         if (*width > destwidth)
1339         {
1340                 *width >>= 1;
1341                 if (*height > destheight)
1342                 {
1343                         // reduce both
1344                         *height >>= 1;
1345                         if (bytesperpixel == 4)
1346                         {
1347                                 for (y = 0;y < *height;y++)
1348                                 {
1349                                         for (x = 0;x < *width;x++)
1350                                         {
1351                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1352                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1353                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1354                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1355                                                 out += 4;
1356                                                 in += 8;
1357                                         }
1358                                         in += nextrow; // skip a line
1359                                 }
1360                         }
1361                         else if (bytesperpixel == 3)
1362                         {
1363                                 for (y = 0;y < *height;y++)
1364                                 {
1365                                         for (x = 0;x < *width;x++)
1366                                         {
1367                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1368                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1369                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1370                                                 out += 3;
1371                                                 in += 6;
1372                                         }
1373                                         in += nextrow; // skip a line
1374                                 }
1375                         }
1376                         else
1377                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1378                 }
1379                 else
1380                 {
1381                         // reduce width
1382                         if (bytesperpixel == 4)
1383                         {
1384                                 for (y = 0;y < *height;y++)
1385                                 {
1386                                         for (x = 0;x < *width;x++)
1387                                         {
1388                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1389                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1390                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1391                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1392                                                 out += 4;
1393                                                 in += 8;
1394                                         }
1395                                 }
1396                         }
1397                         else if (bytesperpixel == 3)
1398                         {
1399                                 for (y = 0;y < *height;y++)
1400                                 {
1401                                         for (x = 0;x < *width;x++)
1402                                         {
1403                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1404                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1405                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1406                                                 out += 3;
1407                                                 in += 6;
1408                                         }
1409                                 }
1410                         }
1411                         else
1412                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1413                 }
1414         }
1415         else
1416         {
1417                 if (*height > destheight)
1418                 {
1419                         // reduce height
1420                         *height >>= 1;
1421                         if (bytesperpixel == 4)
1422                         {
1423                                 for (y = 0;y < *height;y++)
1424                                 {
1425                                         for (x = 0;x < *width;x++)
1426                                         {
1427                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1428                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1429                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1430                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1431                                                 out += 4;
1432                                                 in += 4;
1433                                         }
1434                                         in += nextrow; // skip a line
1435                                 }
1436                         }
1437                         else if (bytesperpixel == 3)
1438                         {
1439                                 for (y = 0;y < *height;y++)
1440                                 {
1441                                         for (x = 0;x < *width;x++)
1442                                         {
1443                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1444                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1445                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1446                                                 out += 3;
1447                                                 in += 3;
1448                                         }
1449                                         in += nextrow; // skip a line
1450                                 }
1451                         }
1452                         else
1453                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1454                 }
1455                 else
1456                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1457         }
1458 }
1459
1460 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1461 {
1462         int x, y;
1463         const unsigned char *p0, *p1, *p2;
1464         unsigned char *out;
1465         float iwidth, iheight, ibumpscale, n[3];
1466         iwidth = 1.0f / width;
1467         iheight = 1.0f / height;
1468         ibumpscale = (255.0f * 3.0f) / bumpscale;
1469         out = outpixels;
1470         for (y = 0;y < height;y++)
1471         {
1472                 for (x = 0;x < width;x++)
1473                 {
1474                         p0 = inpixels + (y * width + x) * 4;
1475                         if (x == width - 1)
1476                         {
1477                                 if (clamp)
1478                                         p1 = inpixels + (y * width + x) * 4;
1479                                 else
1480                                         p1 = inpixels + (y * width) * 4;
1481                         }
1482                         else
1483                                 p1 = inpixels + (y * width + x + 1) * 4;
1484                         if (y == height - 1)
1485                         {
1486                                 if (clamp)
1487                                         p2 = inpixels + (y * width + x) * 4;
1488                                 else
1489                                         p2 = inpixels + x * 4;
1490                         }
1491                         else
1492                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1493                         /*
1494                         dv[0][0] = iwidth;
1495                         dv[0][1] = 0;
1496                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1497                         dv[1][0] = 0;
1498                         dv[1][1] = iheight;
1499                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1500                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1501                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1502                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1503                         */
1504                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1505                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1506                         n[2] = ibumpscale;
1507                         VectorNormalize(n);
1508                         /*
1509                         // this should work for the bottom right triangle if anyone wants
1510                         // code for that for some reason
1511                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1512                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1513                         n[2] = ibumpscale;
1514                         VectorNormalize(n);
1515                         */
1516                         out[0] = 128.0f + n[0] * 127.0f;
1517                         out[1] = 128.0f + n[1] * 127.0f;
1518                         out[2] = 128.0f + n[2] * 127.0f;
1519                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1520                         out += 4;
1521                 }
1522         }
1523 }
1524
1525 int image_loadskin(imageskin_t *s, char *shadername)
1526 {
1527         int j;
1528         qbyte *bumppixels;
1529         int bumppixels_width, bumppixels_height;
1530         char name[MAX_QPATH];
1531         strlcpy(name, shadername, sizeof(name));
1532         Image_StripImageExtension(name, name);
1533         memset(s, 0, sizeof(*s));
1534         s->basepixels = loadimagepixels(name, false, 0, 0);
1535         if (s->basepixels == NULL)
1536                 return false;
1537         s->basepixels_width = image_width;
1538         s->basepixels_height = image_height;
1539
1540         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1541         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1542         {
1543                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1544                 s->maskpixels_width = s->basepixels_width;
1545                 s->maskpixels_height = s->basepixels_height;
1546                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1547                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1548                 {
1549                         s->maskpixels[j+0] = 255;
1550                         s->maskpixels[j+1] = 255;
1551                         s->maskpixels[j+2] = 255;
1552                 }
1553         }
1554
1555         // _luma is supported for tenebrae compatibility
1556         // (I think it's a very stupid name, but oh well)
1557         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1558          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1559         {
1560                 s->glowpixels_width = image_width;
1561                 s->glowpixels_height = image_height;
1562         }
1563         // _norm is the name used by tenebrae
1564         // (I don't like the name much)
1565         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1566         {
1567                 s->nmappixels_width = image_width;
1568                 s->nmappixels_height = image_height;
1569         }
1570         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1571         {
1572                 bumppixels_width = image_width;
1573                 bumppixels_height = image_height;
1574         }
1575         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1576         {
1577                 s->glosspixels_width = image_width;
1578                 s->glosspixels_height = image_height;
1579         }
1580         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1581         {
1582                 s->pantspixels_width = image_width;
1583                 s->pantspixels_height = image_height;
1584         }
1585         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1586         {
1587                 s->shirtpixels_width = image_width;
1588                 s->shirtpixels_height = image_height;
1589         }
1590
1591         if (s->nmappixels == NULL)
1592         {
1593                 if (bumppixels != NULL)
1594                 {
1595                         if (r_shadow_bumpscale_bumpmap.value > 0)
1596                         {
1597                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1598                                 s->nmappixels_width = bumppixels_width;
1599                                 s->nmappixels_height = bumppixels_height;
1600                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1601                         }
1602                 }
1603                 else
1604                 {
1605                         if (r_shadow_bumpscale_basetexture.value > 0)
1606                         {
1607                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1608                                 s->nmappixels_width = s->basepixels_width;
1609                                 s->nmappixels_height = s->basepixels_height;
1610                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1611                         }
1612                 }
1613         }
1614         if (bumppixels != NULL)
1615                 Mem_Free(bumppixels);
1616         return true;
1617 }
1618
1619 void image_freeskin(imageskin_t *s)
1620 {
1621         if (s->basepixels)
1622                 Mem_Free(s->basepixels);
1623         if (s->maskpixels)
1624                 Mem_Free(s->maskpixels);
1625         if (s->nmappixels)
1626                 Mem_Free(s->nmappixels);
1627         if (s->glowpixels)
1628                 Mem_Free(s->glowpixels);
1629         if (s->glosspixels)
1630                 Mem_Free(s->glosspixels);
1631         if (s->pantspixels)
1632                 Mem_Free(s->pantspixels);
1633         if (s->shirtpixels)
1634                 Mem_Free(s->shirtpixels);
1635         memset(s, 0, sizeof(*s));
1636 }
1637