image.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5 #include "image_png.h"
   6 #include "r_shadow.h"
   7
   8 int             image_width;
   9 int             image_height;
  10
  11 #if 1
  12 // written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
  13 void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  14 {
  15         int index, c, x, y;
  16         const unsigned char *in, *line;
  17         int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
  18         int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);
  19
  20         for (c = 0; c < numoutputcomponents; c++)
  21                 if (outputinputcomponentindices[c] & 0x80000000)
  22                         break;
  23         if (c < numoutputcomponents)
  24         {
  25                 // special indices used
  26                 if (inputflipdiagonal)
  27                 {
  28                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  29                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
  30                                         for (c = 0; c < numoutputcomponents; c++)
  31                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  32                 }
  33                 else
  34                 {
  35                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  36                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
  37                                         for (c = 0; c < numoutputcomponents; c++)
  38                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  39                 }
  40         }
  41         else
  42         {
  43                 // special indices not used
  44                 if (inputflipdiagonal)
  45                 {
  46                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  47                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
  48                                         for (c = 0; c < numoutputcomponents; c++)
  49                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  50                 }
  51                 else
  52                 {
  53                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  54                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
  55                                         for (c = 0; c < numoutputcomponents; c++)
  56                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  57                 }
  58         }
  59 }
  60 #else
  61 // intentionally readable version
  62 void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  63 {
  64         int index, c, x, y;
  65         const unsigned char *in, *inrow, *incolumn;
  66         if (inputflipdiagonal)
  67         {
  68                 for (x = 0;x < inputwidth;x++)
  69                 {
  70                         for (y = 0;y < inputheight;y++)
  71                         {
  72                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  73                                 for (c = 0;c < numoutputcomponents;c++)
  74                                 {
  75                                         index = outputinputcomponentindices[c];
  76                                         if (index & 0x80000000)
  77                                                 *outpixels++ = index;
  78                                         else
  79                                                 *outpixels++ = in[index];
  80                                 }
  81                         }
  82                 }
  83         }
  84         else
  85         {
  86                 for (y = 0;y < inputheight;y++)
  87                 {
  88                         for (x = 0;x < inputwidth;x++)
  89                         {
  90                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  91                                 for (c = 0;c < numoutputcomponents;c++)
  92                                 {
  93                                         index = outputinputcomponentindices[c];
  94                                         if (index & 0x80000000)
  95                                                 *outpixels++ = index;
  96                                         else
  97                                                 *outpixels++ = in[index];
  98                                 }
  99                         }
 100                 }
 101         }
 102 }
 103 #endif
 104
 105 void Image_GammaRemapRGB(const unsigned char *in, unsigned char *out, int pixels, const unsigned char *gammar, const unsigned char *gammag, const unsigned char *gammab)
 106 {
 107         while (pixels--)
 108         {
 109                 out[0] = gammar[in[0]];
 110                 out[1] = gammag[in[1]];
 111                 out[2] = gammab[in[2]];
 112                 in += 3;
 113                 out += 3;
 114         }
 115 }
 116
 117 // note: pal must be 32bit color
 118 void Image_Copy8bitRGBA(const unsigned char *in, unsigned char *out, int pixels, const unsigned int *pal)
 119 {
 120         int *iout = (int *)out;
 121         while (pixels >= 8)
 122         {
 123                 iout[0] = pal[in[0]];
 124                 iout[1] = pal[in[1]];
 125                 iout[2] = pal[in[2]];
 126                 iout[3] = pal[in[3]];
 127                 iout[4] = pal[in[4]];
 128                 iout[5] = pal[in[5]];
 129                 iout[6] = pal[in[6]];
 130                 iout[7] = pal[in[7]];
 131                 in += 8;
 132                 iout += 8;
 133                 pixels -= 8;
 134         }
 135         if (pixels & 4)
 136         {
 137                 iout[0] = pal[in[0]];
 138                 iout[1] = pal[in[1]];
 139                 iout[2] = pal[in[2]];
 140                 iout[3] = pal[in[3]];
 141                 in += 4;
 142                 iout += 4;
 143         }
 144         if (pixels & 2)
 145         {
 146                 iout[0] = pal[in[0]];
 147                 iout[1] = pal[in[1]];
 148                 in += 2;
 149                 iout += 2;
 150         }
 151         if (pixels & 1)
 152                 iout[0] = pal[in[0]];
 153 }
 154
 155 /*
 156 =================================================================
 157
 158   PCX Loading
 159
 160 =================================================================
 161 */
 162
 163 typedef struct pcx_s
 164 {
 165     char        manufacturer;
 166     char        version;
 167     char        encoding;
 168     char        bits_per_pixel;
 169     unsigned short      xmin,ymin,xmax,ymax;
 170     unsigned short      hres,vres;
 171     unsigned char       palette[48];
 172     char        reserved;
 173     char        color_planes;
 174     unsigned short      bytes_per_line;
 175     unsigned short      palette_type;
 176     char        filler[58];
 177 } pcx_t;
 178
 179 /*
 180 ============
 181 LoadPCX
 182 ============
 183 */
 184 unsigned char* LoadPCX (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 185 {
 186         pcx_t pcx;
 187         unsigned char *a, *b, *image_rgba, *pbuf;
 188         const unsigned char *palette, *fin, *enddata;
 189         int x, y, x2, dataByte;
 190
 191         if (filesize < (int)sizeof(pcx) + 768)
 192         {
 193                 Con_Print("Bad pcx file\n");
 194                 return NULL;
 195         }
 196
 197         fin = f;
 198
 199         memcpy(&pcx, fin, sizeof(pcx));
 200         fin += sizeof(pcx);
 201
 202         // LordHavoc: big-endian support ported from QF newtree
 203         pcx.xmax = LittleShort (pcx.xmax);
 204         pcx.xmin = LittleShort (pcx.xmin);
 205         pcx.ymax = LittleShort (pcx.ymax);
 206         pcx.ymin = LittleShort (pcx.ymin);
 207         pcx.hres = LittleShort (pcx.hres);
 208         pcx.vres = LittleShort (pcx.vres);
 209         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 210         pcx.palette_type = LittleShort (pcx.palette_type);
 211
 212         image_width = pcx.xmax + 1 - pcx.xmin;
 213         image_height = pcx.ymax + 1 - pcx.ymin;
 214         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)
 215         {
 216                 Con_Print("Bad pcx file\n");
 217                 return NULL;
 218         }
 219         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 220                 return NULL;
 221
 222         palette = f + filesize - 768;
 223
 224         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
 225         if (!image_rgba)
 226         {
 227                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 228                 return NULL;
 229         }
 230         pbuf = image_rgba + image_width*image_height*3;
 231         enddata = palette;
 232
 233         for (y = 0;y < image_height && fin < enddata;y++)
 234         {
 235                 a = pbuf + y * image_width;
 236                 for (x = 0;x < image_width && fin < enddata;)
 237                 {
 238                         dataByte = *fin++;
 239                         if(dataByte >= 0xC0)
 240                         {
 241                                 if (fin >= enddata)
 242                                         break;
 243                                 x2 = x + (dataByte & 0x3F);
 244                                 dataByte = *fin++;
 245                                 if (x2 > image_width)
 246                                         x2 = image_width; // technically an error
 247                                 while(x < x2)
 248                                         a[x++] = dataByte;
 249                         }
 250                         else
 251                                 a[x++] = dataByte;
 252                 }
 253                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
 254                 while(x < image_width)
 255                         a[x++] = 0;
 256         }
 257
 258         a = image_rgba;
 259         b = pbuf;
 260
 261         for(x = 0;x < image_width*image_height;x++)
 262         {
 263                 y = *b++ * 3;
 264                 *a++ = palette[y];
 265                 *a++ = palette[y+1];
 266                 *a++ = palette[y+2];
 267                 *a++ = 255;
 268         }
 269
 270         return image_rgba;
 271 }
 272
 273 /*
 274 =========================================================
 275
 276 TARGA LOADING
 277
 278 =========================================================
 279 */
 280
 281 typedef struct _TargaHeader
 282 {
 283         unsigned char   id_length, colormap_type, image_type;
 284         unsigned short  colormap_index, colormap_length;
 285         unsigned char   colormap_size;
 286         unsigned short  x_origin, y_origin, width, height;
 287         unsigned char   pixel_size, attributes;
 288 }
 289 TargaHeader;
 290
 291 void PrintTargaHeader(TargaHeader *t)
 292 {
 293         Con_Printf("TargaHeader:\nuint8 id_length = %i;\nuint8 colormap_type = %i;\nuint8 image_type = %i;\nuint16 colormap_index = %i;\nuint16 colormap_length = %i;\nuint8 colormap_size = %i;\nuint16 x_origin = %i;\nuint16 y_origin = %i;\nuint16 width = %i;\nuint16 height = %i;\nuint8 pixel_size = %i;\nuint8 attributes = %i;\n", t->id_length, t->colormap_type, t->image_type, t->colormap_index, t->colormap_length, t->colormap_size, t->x_origin, t->y_origin, t->width, t->height, t->pixel_size, t->attributes);
 294 }
 295
 296 /*
 297 =============
 298 LoadTGA
 299 =============
 300 */
 301 unsigned char *LoadTGA (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 302 {
 303         int x, y, pix_inc, row_inc, red, green, blue, alpha, runlen, alphabits;
 304         unsigned char *pixbuf, *image_rgba;
 305         const unsigned char *fin, *enddata;
 306         unsigned char *p;
 307         TargaHeader targa_header;
 308         unsigned char palette[256*4];
 309
 310         if (filesize < 19)
 311                 return NULL;
 312
 313         enddata = f + filesize;
 314
 315         targa_header.id_length = f[0];
 316         targa_header.colormap_type = f[1];
 317         targa_header.image_type = f[2];
 318
 319         targa_header.colormap_index = f[3] + f[4] * 256;
 320         targa_header.colormap_length = f[5] + f[6] * 256;
 321         targa_header.colormap_size = f[7];
 322         targa_header.x_origin = f[8] + f[9] * 256;
 323         targa_header.y_origin = f[10] + f[11] * 256;
 324         targa_header.width = image_width = f[12] + f[13] * 256;
 325         targa_header.height = image_height = f[14] + f[15] * 256;
 326         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 327         {
 328                 Con_Print("LoadTGA: invalid size\n");
 329                 PrintTargaHeader(&targa_header);
 330                 return NULL;
 331         }
 332         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 333                 return NULL;
 334         targa_header.pixel_size = f[16];
 335         targa_header.attributes = f[17];
 336
 337         // advance to end of header
 338         fin = f + 18;
 339
 340         // skip TARGA image comment (usually 0 bytes)
 341         fin += targa_header.id_length;
 342
 343         // read/skip the colormap if present (note: according to the TARGA spec it
 344         // can be present even on truecolor or greyscale images, just not used by
 345         // the image data)
 346         if (targa_header.colormap_type)
 347         {
 348                 if (targa_header.colormap_length > 256)
 349                 {
 350                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 351                         PrintTargaHeader(&targa_header);
 352                         return NULL;
 353                 }
 354                 if (targa_header.colormap_index)
 355                 {
 356                         Con_Print("LoadTGA: colormap_index not supported\n");
 357                         PrintTargaHeader(&targa_header);
 358                         return NULL;
 359                 }
 360                 if (targa_header.colormap_size == 24)
 361                 {
 362                         for (x = 0;x < targa_header.colormap_length;x++)
 363                         {
 364                                 palette[x*4+2] = *fin++;
 365                                 palette[x*4+1] = *fin++;
 366                                 palette[x*4+0] = *fin++;
 367                                 palette[x*4+3] = 255;
 368                         }
 369                 }
 370                 else if (targa_header.colormap_size == 32)
 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] = *fin++;
 378                         }
 379                 }
 380                 else
 381                 {
 382                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 383                         PrintTargaHeader(&targa_header);
 384                         return NULL;
 385                 }
 386         }
 387
 388         // check our pixel_size restrictions according to image_type
 389         switch (targa_header.image_type & ~8)
 390         {
 391         case 2:
 392                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 393                 {
 394                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 395                         PrintTargaHeader(&targa_header);
 396                         return NULL;
 397                 }
 398                 break;
 399         case 3:
 400                 // set up a palette to make the loader easier
 401                 for (x = 0;x < 256;x++)
 402                 {
 403                         palette[x*4+2] = x;
 404                         palette[x*4+1] = x;
 405                         palette[x*4+0] = x;
 406                         palette[x*4+3] = 255;
 407                 }
 408                 // fall through to colormap case
 409         case 1:
 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                 break;
 417         default:
 418                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 419                 PrintTargaHeader(&targa_header);
 420                 return NULL;
 421         }
 422
 423         if (targa_header.attributes & 0x10)
 424         {
 425                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 426                 return NULL;
 427         }
 428
 429         // number of attribute bits per pixel, we only support 0 or 8
 430         alphabits = targa_header.attributes & 0x0F;
 431         if (alphabits != 8 && alphabits != 0)
 432         {
 433                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
 434                 return NULL;
 435         }
 436
 437         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 438         if (!image_rgba)
 439         {
 440                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 441                 return NULL;
 442         }
 443
 444         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 445         if ((targa_header.attributes & 0x20) == 0)
 446         {
 447                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 448                 row_inc = -image_width*4*2;
 449         }
 450         else
 451         {
 452                 pixbuf = image_rgba;
 453                 row_inc = 0;
 454         }
 455
 456         x = 0;
 457         y = 0;
 458         red = green = blue = alpha = 255;
 459         pix_inc = 1;
 460         if ((targa_header.image_type & ~8) == 2)
 461                 pix_inc = targa_header.pixel_size / 8;
 462         switch (targa_header.image_type)
 463         {
 464         case 1: // colormapped, uncompressed
 465         case 3: // greyscale, uncompressed
 466                 if (fin + image_width * image_height * pix_inc > enddata)
 467                         break;
 468                 for (y = 0;y < image_height;y++, pixbuf += row_inc)
 469                 {
 470                         for (x = 0;x < image_width;x++)
 471                         {
 472                                 p = palette + *fin++ * 4;
 473                                 *pixbuf++ = p[0];
 474                                 *pixbuf++ = p[1];
 475                                 *pixbuf++ = p[2];
 476                                 *pixbuf++ = p[3];
 477                         }
 478                 }
 479                 break;
 480         case 2:
 481                 // BGR or BGRA, uncompressed
 482                 if (fin + image_width * image_height * pix_inc > enddata)
 483                         break;
 484                 if (targa_header.pixel_size == 32 && alphabits)
 485                 {
 486                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
 487                         {
 488                                 for (x = 0;x < image_width;x++, fin += pix_inc)
 489                                 {
 490                                         *pixbuf++ = fin[2];
 491                                         *pixbuf++ = fin[1];
 492                                         *pixbuf++ = fin[0];
 493                                         *pixbuf++ = fin[3];
 494                                 }
 495                         }
 496                 }
 497                 else
 498                 {
 499                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
 500                         {
 501                                 for (x = 0;x < image_width;x++, fin += pix_inc)
 502                                 {
 503                                         *pixbuf++ = fin[2];
 504                                         *pixbuf++ = fin[1];
 505                                         *pixbuf++ = fin[0];
 506                                         *pixbuf++ = 255;
 507                                 }
 508                         }
 509                 }
 510                 break;
 511         case 9: // colormapped, RLE
 512         case 11: // greyscale, RLE
 513                 for (y = 0;y < image_height;y++, pixbuf += row_inc)
 514                 {
 515                         for (x = 0;x < image_width;)
 516                         {
 517                                 if (fin >= enddata)
 518                                         break; // error - truncated file
 519                                 runlen = *fin++;
 520                                 if (runlen & 0x80)
 521                                 {
 522                                         // RLE - all pixels the same color
 523                                         runlen += 1 - 0x80;
 524                                         if (fin + pix_inc > enddata)
 525                                                 break; // error - truncated file
 526                                         if (x + runlen > image_width)
 527                                                 break; // error - line exceeds width
 528                                         p = palette + *fin++ * 4;
 529                                         red = p[0];
 530                                         green = p[1];
 531                                         blue = p[2];
 532                                         alpha = p[3];
 533                                         for (;runlen--;x++)
 534                                         {
 535                                                 *pixbuf++ = red;
 536                                                 *pixbuf++ = green;
 537                                                 *pixbuf++ = blue;
 538                                                 *pixbuf++ = alpha;
 539                                         }
 540                                 }
 541                                 else
 542                                 {
 543                                         // uncompressed - all pixels different color
 544                                         runlen++;
 545                                         if (fin + pix_inc * runlen > enddata)
 546                                                 break; // error - truncated file
 547                                         if (x + runlen > image_width)
 548                                                 break; // error - line exceeds width
 549                                         for (;runlen--;x++)
 550                                         {
 551                                                 p = palette + *fin++ * 4;
 552                                                 *pixbuf++ = p[0];
 553                                                 *pixbuf++ = p[1];
 554                                                 *pixbuf++ = p[2];
 555                                                 *pixbuf++ = p[3];
 556                                         }
 557                                 }
 558                         }
 559                 }
 560                 break;
 561         case 10:
 562                 // BGR or BGRA, RLE
 563                 if (targa_header.pixel_size == 32 && alphabits)
 564                 {
 565                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
 566                         {
 567                                 for (x = 0;x < image_width;)
 568                                 {
 569                                         if (fin >= enddata)
 570                                                 break; // error - truncated file
 571                                         runlen = *fin++;
 572                                         if (runlen & 0x80)
 573                                         {
 574                                                 // RLE - all pixels the same color
 575                                                 runlen += 1 - 0x80;
 576                                                 if (fin + pix_inc > enddata)
 577                                                         break; // error - truncated file
 578                                                 if (x + runlen > image_width)
 579                                                         break; // error - line exceeds width
 580                                                 red = fin[2];
 581                                                 green = fin[1];
 582                                                 blue = fin[0];
 583                                                 alpha = fin[3];
 584                                                 fin += pix_inc;
 585                                                 for (;runlen--;x++)
 586                                                 {
 587                                                         *pixbuf++ = red;
 588                                                         *pixbuf++ = green;
 589                                                         *pixbuf++ = blue;
 590                                                         *pixbuf++ = alpha;
 591                                                 }
 592                                         }
 593                                         else
 594                                         {
 595                                                 // uncompressed - all pixels different color
 596                                                 runlen++;
 597                                                 if (fin + pix_inc * runlen > enddata)
 598                                                         break; // error - truncated file
 599                                                 if (x + runlen > image_width)
 600                                                         break; // error - line exceeds width
 601                                                 for (;runlen--;x++, fin += pix_inc)
 602                                                 {
 603                                                         *pixbuf++ = fin[2];
 604                                                         *pixbuf++ = fin[1];
 605                                                         *pixbuf++ = fin[0];
 606                                                         *pixbuf++ = fin[3];
 607                                                 }
 608                                         }
 609                                 }
 610                         }
 611                 }
 612                 else
 613                 {
 614                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
 615                         {
 616                                 for (x = 0;x < image_width;)
 617                                 {
 618                                         if (fin >= enddata)
 619                                                 break; // error - truncated file
 620                                         runlen = *fin++;
 621                                         if (runlen & 0x80)
 622                                         {
 623                                                 // RLE - all pixels the same color
 624                                                 runlen += 1 - 0x80;
 625                                                 if (fin + pix_inc > enddata)
 626                                                         break; // error - truncated file
 627                                                 if (x + runlen > image_width)
 628                                                         break; // error - line exceeds width
 629                                                 red = fin[2];
 630                                                 green = fin[1];
 631                                                 blue = fin[0];
 632                                                 alpha = 255;
 633                                                 fin += pix_inc;
 634                                                 for (;runlen--;x++)
 635                                                 {
 636                                                         *pixbuf++ = red;
 637                                                         *pixbuf++ = green;
 638                                                         *pixbuf++ = blue;
 639                                                         *pixbuf++ = alpha;
 640                                                 }
 641                                         }
 642                                         else
 643                                         {
 644                                                 // uncompressed - all pixels different color
 645                                                 runlen++;
 646                                                 if (fin + pix_inc * runlen > enddata)
 647                                                         break; // error - truncated file
 648                                                 if (x + runlen > image_width)
 649                                                         break; // error - line exceeds width
 650                                                 for (;runlen--;x++, fin += pix_inc)
 651                                                 {
 652                                                         *pixbuf++ = fin[2];
 653                                                         *pixbuf++ = fin[1];
 654                                                         *pixbuf++ = fin[0];
 655                                                         *pixbuf++ = 255;
 656                                                 }
 657                                         }
 658                                 }
 659                         }
 660                 }
 661                 break;
 662         default:
 663                 // unknown image_type
 664                 break;
 665         }
 666
 667         return image_rgba;
 668 }
 669
 670 /*
 671 ============
 672 LoadLMP
 673 ============
 674 */
 675 unsigned char *LoadLMP (const unsigned char *f, int filesize, int matchwidth, int matchheight, qboolean loadAs8Bit)
 676 {
 677         unsigned char *image_buffer;
 678
 679         if (filesize < 9)
 680         {
 681                 Con_Print("LoadLMP: invalid LMP file\n");
 682                 return NULL;
 683         }
 684
 685         // parse the very complicated header *chuckle*
 686         image_width = BuffLittleLong(f);
 687         image_height = BuffLittleLong(f + 4);
 688         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 689         {
 690                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 691                 return NULL;
 692         }
 693         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 694                 return NULL;
 695
 696         if (filesize < (8 + image_width * image_height))
 697         {
 698                 Con_Print("LoadLMP: invalid LMP file\n");
 699                 return NULL;
 700         }
 701
 702         if (loadAs8Bit)
 703         {
 704                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height);
 705                 memcpy(image_buffer, f + 8, image_width * image_height);
 706         }
 707         else
 708         {
 709                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 710                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_transparent);
 711         }
 712         return image_buffer;
 713 }
 714
 715 static unsigned char *LoadLMPRGBA (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 716 {
 717         return LoadLMP(f, filesize, matchwidth, matchheight, false);
 718 }
 719
 720
 721 typedef struct q2wal_s
 722 {
 723         char            name[32];
 724         unsigned        width, height;
 725         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 726         char            animname[32];                   // next frame in animation chain
 727         int                     flags;
 728         int                     contents;
 729         int                     value;
 730 } q2wal_t;
 731
 732 unsigned char *LoadWAL (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 733 {
 734         unsigned char *image_rgba;
 735         const q2wal_t *inwal = (const q2wal_t *)f;
 736
 737         if (filesize < (int) sizeof(q2wal_t))
 738         {
 739                 Con_Print("LoadWAL: invalid WAL file\n");
 740                 return NULL;
 741         }
 742
 743         image_width = LittleLong(inwal->width);
 744         image_height = LittleLong(inwal->height);
 745         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 746         {
 747                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 748                 return NULL;
 749         }
 750         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 751                 return NULL;
 752
 753         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 754         {
 755                 Con_Print("LoadWAL: invalid WAL file\n");
 756                 return NULL;
 757         }
 758
 759         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 760         if (!image_rgba)
 761         {
 762                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 763                 return NULL;
 764         }
 765         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 766         return image_rgba;
 767 }
 768
 769
 770 void Image_StripImageExtension (const char *in, char *out)
 771 {
 772         const char *end, *temp;
 773         end = in + strlen(in);
 774         if ((end - in) >= 4)
 775         {
 776                 temp = end - 4;
 777                 if (strcmp(temp, ".tga") == 0
 778                  || strcmp(temp, ".pcx") == 0
 779                  || strcmp(temp, ".lmp") == 0
 780                  || strcmp(temp, ".png") == 0
 781                  || strcmp(temp, ".jpg") == 0)
 782                         end = temp;
 783                 while (in < end)
 784                         *out++ = *in++;
 785                 *out++ = 0;
 786         }
 787         else
 788                 strcpy(out, in);
 789 }
 790
 791 typedef struct imageformat_s
 792 {
 793         const char *formatstring;
 794         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int matchwidth, int matchheight);
 795 }
 796 imageformat_t;
 797
 798 // GAME_TENEBRAE only
 799 imageformat_t imageformats_tenebrae[] =
 800 {
 801         {"override/%s.tga", LoadTGA},
 802         {"override/%s.png", PNG_LoadImage},
 803         {"override/%s.jpg", JPEG_LoadImage},
 804         {NULL, NULL}
 805 };
 806
 807 imageformat_t imageformats_nopath[] =
 808 {
 809         {"textures/%s.tga", LoadTGA},
 810         {"textures/%s.png", PNG_LoadImage},
 811         {"textures/%s.jpg", JPEG_LoadImage},
 812         {"%s.tga", LoadTGA},
 813         {"%s.png", PNG_LoadImage},
 814         {"%s.jpg", JPEG_LoadImage},
 815         {NULL, NULL}
 816 };
 817
 818 imageformat_t imageformats_textures[] =
 819 {
 820         {"%s.tga", LoadTGA},
 821         {"%s.png", PNG_LoadImage},
 822         {"%s.jpg", JPEG_LoadImage},
 823         {"%s.pcx", LoadPCX},
 824         {"%s.wal", LoadWAL},
 825         {NULL, NULL}
 826 };
 827
 828 imageformat_t imageformats_gfx[] =
 829 {
 830         {"%s.tga", LoadTGA},
 831         {"%s.png", PNG_LoadImage},
 832         {"%s.jpg", JPEG_LoadImage},
 833         {"%s.pcx", LoadPCX},
 834         {"%s.lmp", LoadLMPRGBA},
 835         {NULL, NULL}
 836 };
 837
 838 imageformat_t imageformats_other[] =
 839 {
 840         {"%s.tga", LoadTGA},
 841         {"%s.png", PNG_LoadImage},
 842         {"%s.jpg", JPEG_LoadImage},
 843         {"%s.pcx", LoadPCX},
 844         {NULL, NULL}
 845 };
 846
 847 unsigned char *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 848 {
 849         fs_offset_t filesize;
 850         imageformat_t *firstformat, *format;
 851         unsigned char *f, *data = NULL;
 852         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 853         if (developer_memorydebug.integer)
 854                 Mem_CheckSentinelsGlobal();
 855         if (developer_texturelogging.integer)
 856                 Log_Printf("textures.log", "%s\n", filename);
 857         strlcpy(basename, filename, sizeof(basename));
 858         Image_StripImageExtension(basename, basename); // strip filename extensions to allow replacement by other types
 859         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 860         for (c = basename;*c;c++)
 861                 if (*c == '*')
 862                         *c = '#';
 863         name[0] = 0;
 864         if (strchr(basename, '/'))
 865         {
 866                 int i;
 867                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
 868                         name[i] = basename[i];
 869                 name[i] = 0;
 870         }
 871         if (gamemode == GAME_TENEBRAE)
 872                 firstformat = imageformats_tenebrae;
 873         else if (!strcasecmp(name, "textures"))
 874                 firstformat = imageformats_textures;
 875         else if (!strcasecmp(name, "gfx"))
 876                 firstformat = imageformats_gfx;
 877         else if (!strchr(name, '/'))
 878                 firstformat = imageformats_nopath;
 879         else
 880                 firstformat = imageformats_other;
 881         // now try all the formats in the selected list
 882         for (format = firstformat;format->formatstring;format++)
 883         {
 884                 sprintf (name, format->formatstring, basename);
 885                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 886                 if (f)
 887                 {
 888                         data = format->loadfunc(f, filesize, matchwidth, matchheight);
 889                         Mem_Free(f);
 890                         if (data)
 891                         {
 892                                 if (developer.integer >= 10)
 893                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 894                                 if (developer_memorydebug.integer)
 895                                         Mem_CheckSentinelsGlobal();
 896                                 return data;
 897                         }
 898                 }
 899         }
 900         if (complain)
 901         {
 902                 Con_Printf("Couldn't load %s using ", filename);
 903                 for (format = firstformat;format->formatstring;format++)
 904                 {
 905                         sprintf (name, format->formatstring, basename);
 906                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
 907                 }
 908         }
 909         if (developer_memorydebug.integer)
 910                 Mem_CheckSentinelsGlobal();
 911         return NULL;
 912 }
 913
 914 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 915 {
 916         unsigned char *data;
 917         rtexture_t *rt;
 918         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 919                 return 0;
 920         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 921         Mem_Free(data);
 922         return rt;
 923 }
 924
 925 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
 926 {
 927         qboolean ret;
 928         unsigned char *out;
 929         const unsigned char *in, *end;
 930
 931         memset (buffer, 0, 18);
 932         buffer[2] = 2;          // uncompressed type
 933         buffer[12] = (width >> 0) & 0xFF;
 934         buffer[13] = (width >> 8) & 0xFF;
 935         buffer[14] = (height >> 0) & 0xFF;
 936         buffer[15] = (height >> 8) & 0xFF;
 937         buffer[16] = 24;        // pixel size
 938
 939         // swap rgb to bgr
 940         in = data;
 941         out = buffer + 18;
 942         end = in + width*height*3;
 943         for (;in < end;in += 3)
 944         {
 945                 *out++ = in[2];
 946                 *out++ = in[1];
 947                 *out++ = in[0];
 948         }
 949         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 950
 951         return ret;
 952 }
 953
 954 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
 955 {
 956         int y;
 957         unsigned char *buffer, *out;
 958         const unsigned char *in, *end;
 959
 960         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
 961
 962         memset (buffer, 0, 18);
 963         buffer[2] = 2;          // uncompressed type
 964         buffer[12] = (width >> 0) & 0xFF;
 965         buffer[13] = (width >> 8) & 0xFF;
 966         buffer[14] = (height >> 0) & 0xFF;
 967         buffer[15] = (height >> 8) & 0xFF;
 968         buffer[16] = 32;        // pixel size
 969         buffer[17] = 8; // 8 bits of alpha
 970
 971         // swap rgba to bgra and flip upside down
 972         out = buffer + 18;
 973         for (y = height - 1;y >= 0;y--)
 974         {
 975                 in = data + y * width * 4;
 976                 end = in + width * 4;
 977                 for (;in < end;in += 4)
 978                 {
 979                         *out++ = in[2];
 980                         *out++ = in[1];
 981                         *out++ = in[0];
 982                         *out++ = in[3];
 983                 }
 984         }
 985         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 986
 987         Mem_Free(buffer);
 988 }
 989
 990 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 991 {
 992         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 993         fstep = (int) (inwidth*65536.0f/outwidth);
 994         endx = (inwidth-1);
 995         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 996         {
 997                 xi = f >> 16;
 998                 if (xi != oldx)
 999                 {
1000                         in += (xi - oldx) * 4;
1001                         oldx = xi;
1002                 }
1003                 if (xi < endx)
1004                 {
1005                         lerp = f & 0xFFFF;
1006                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1007                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1008                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1009                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1010                 }
1011                 else // last pixel of the line has no pixel to lerp to
1012                 {
1013                         *out++ = in[0];
1014                         *out++ = in[1];
1015                         *out++ = in[2];
1016                         *out++ = in[3];
1017                 }
1018         }
1019 }
1020
1021 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1022 {
1023         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1024         fstep = (int) (inwidth*65536.0f/outwidth);
1025         endx = (inwidth-1);
1026         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1027         {
1028                 xi = f >> 16;
1029                 if (xi != oldx)
1030                 {
1031                         in += (xi - oldx) * 3;
1032                         oldx = xi;
1033                 }
1034                 if (xi < endx)
1035                 {
1036                         lerp = f & 0xFFFF;
1037                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1038                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1039                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1040                 }
1041                 else // last pixel of the line has no pixel to lerp to
1042                 {
1043                         *out++ = in[0];
1044                         *out++ = in[1];
1045                         *out++ = in[2];
1046                 }
1047         }
1048 }
1049
1050 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1051 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1052 {
1053         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1054         unsigned char *out;
1055         const unsigned char *inrow;
1056         unsigned char *resamplerow1;
1057         unsigned char *resamplerow2;
1058         out = (unsigned char *)outdata;
1059         fstep = (int) (inheight*65536.0f/outheight);
1060
1061         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1062         resamplerow2 = resamplerow1 + outwidth*4;
1063
1064         inrow = (const unsigned char *)indata;
1065         oldy = 0;
1066         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1067         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1068         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1069         {
1070                 yi = f >> 16;
1071                 if (yi < endy)
1072                 {
1073                         lerp = f & 0xFFFF;
1074                         if (yi != oldy)
1075                         {
1076                                 inrow = (unsigned char *)indata + inwidth4*yi;
1077                                 if (yi == oldy+1)
1078                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1079                                 else
1080                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1081                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1082                                 oldy = yi;
1083                         }
1084                         j = outwidth - 4;
1085                         while(j >= 0)
1086                         {
1087                                 LERPBYTE( 0);
1088                                 LERPBYTE( 1);
1089                                 LERPBYTE( 2);
1090                                 LERPBYTE( 3);
1091                                 LERPBYTE( 4);
1092                                 LERPBYTE( 5);
1093                                 LERPBYTE( 6);
1094                                 LERPBYTE( 7);
1095                                 LERPBYTE( 8);
1096                                 LERPBYTE( 9);
1097                                 LERPBYTE(10);
1098                                 LERPBYTE(11);
1099                                 LERPBYTE(12);
1100                                 LERPBYTE(13);
1101                                 LERPBYTE(14);
1102                                 LERPBYTE(15);
1103                                 out += 16;
1104                                 resamplerow1 += 16;
1105                                 resamplerow2 += 16;
1106                                 j -= 4;
1107                         }
1108                         if (j & 2)
1109                         {
1110                                 LERPBYTE( 0);
1111                                 LERPBYTE( 1);
1112                                 LERPBYTE( 2);
1113                                 LERPBYTE( 3);
1114                                 LERPBYTE( 4);
1115                                 LERPBYTE( 5);
1116                                 LERPBYTE( 6);
1117                                 LERPBYTE( 7);
1118                                 out += 8;
1119                                 resamplerow1 += 8;
1120                                 resamplerow2 += 8;
1121                         }
1122                         if (j & 1)
1123                         {
1124                                 LERPBYTE( 0);
1125                                 LERPBYTE( 1);
1126                                 LERPBYTE( 2);
1127                                 LERPBYTE( 3);
1128                                 out += 4;
1129                                 resamplerow1 += 4;
1130                                 resamplerow2 += 4;
1131                         }
1132                         resamplerow1 -= outwidth4;
1133                         resamplerow2 -= outwidth4;
1134                 }
1135                 else
1136                 {
1137                         if (yi != oldy)
1138                         {
1139                                 inrow = (unsigned char *)indata + inwidth4*yi;
1140                                 if (yi == oldy+1)
1141                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1142                                 else
1143                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1144                                 oldy = yi;
1145                         }
1146                         memcpy(out, resamplerow1, outwidth4);
1147                 }
1148         }
1149
1150         Mem_Free(resamplerow1);
1151         resamplerow1 = NULL;
1152         resamplerow2 = NULL;
1153 }
1154
1155 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1156 {
1157         int i, j;
1158         unsigned frac, fracstep;
1159         // relies on int being 4 bytes
1160         int *inrow, *out;
1161         out = (int *)outdata;
1162
1163         fracstep = inwidth*0x10000/outwidth;
1164         for (i = 0;i < outheight;i++)
1165         {
1166                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1167                 frac = fracstep >> 1;
1168                 j = outwidth - 4;
1169                 while (j >= 0)
1170                 {
1171                         out[0] = inrow[frac >> 16];frac += fracstep;
1172                         out[1] = inrow[frac >> 16];frac += fracstep;
1173                         out[2] = inrow[frac >> 16];frac += fracstep;
1174                         out[3] = inrow[frac >> 16];frac += fracstep;
1175                         out += 4;
1176                         j -= 4;
1177                 }
1178                 if (j & 2)
1179                 {
1180                         out[0] = inrow[frac >> 16];frac += fracstep;
1181                         out[1] = inrow[frac >> 16];frac += fracstep;
1182                         out += 2;
1183                 }
1184                 if (j & 1)
1185                 {
1186                         out[0] = inrow[frac >> 16];frac += fracstep;
1187                         out += 1;
1188                 }
1189         }
1190 }
1191
1192 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1193 {
1194         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1195         unsigned char *out;
1196         const unsigned char *inrow;
1197         unsigned char *resamplerow1;
1198         unsigned char *resamplerow2;
1199         out = (unsigned char *)outdata;
1200         fstep = (int) (inheight*65536.0f/outheight);
1201
1202         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1203         resamplerow2 = resamplerow1 + outwidth*3;
1204
1205         inrow = (const unsigned char *)indata;
1206         oldy = 0;
1207         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1208         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1209         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1210         {
1211                 yi = f >> 16;
1212                 if (yi < endy)
1213                 {
1214                         lerp = f & 0xFFFF;
1215                         if (yi != oldy)
1216                         {
1217                                 inrow = (unsigned char *)indata + inwidth3*yi;
1218                                 if (yi == oldy+1)
1219                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1220                                 else
1221                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1222                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1223                                 oldy = yi;
1224                         }
1225                         j = outwidth - 4;
1226                         while(j >= 0)
1227                         {
1228                                 LERPBYTE( 0);
1229                                 LERPBYTE( 1);
1230                                 LERPBYTE( 2);
1231                                 LERPBYTE( 3);
1232                                 LERPBYTE( 4);
1233                                 LERPBYTE( 5);
1234                                 LERPBYTE( 6);
1235                                 LERPBYTE( 7);
1236                                 LERPBYTE( 8);
1237                                 LERPBYTE( 9);
1238                                 LERPBYTE(10);
1239                                 LERPBYTE(11);
1240                                 out += 12;
1241                                 resamplerow1 += 12;
1242                                 resamplerow2 += 12;
1243                                 j -= 4;
1244                         }
1245                         if (j & 2)
1246                         {
1247                                 LERPBYTE( 0);
1248                                 LERPBYTE( 1);
1249                                 LERPBYTE( 2);
1250                                 LERPBYTE( 3);
1251                                 LERPBYTE( 4);
1252                                 LERPBYTE( 5);
1253                                 out += 6;
1254                                 resamplerow1 += 6;
1255                                 resamplerow2 += 6;
1256                         }
1257                         if (j & 1)
1258                         {
1259                                 LERPBYTE( 0);
1260                                 LERPBYTE( 1);
1261                                 LERPBYTE( 2);
1262                                 out += 3;
1263                                 resamplerow1 += 3;
1264                                 resamplerow2 += 3;
1265                         }
1266                         resamplerow1 -= outwidth3;
1267                         resamplerow2 -= outwidth3;
1268                 }
1269                 else
1270                 {
1271                         if (yi != oldy)
1272                         {
1273                                 inrow = (unsigned char *)indata + inwidth3*yi;
1274                                 if (yi == oldy+1)
1275                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1276                                 else
1277                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1278                                 oldy = yi;
1279                         }
1280                         memcpy(out, resamplerow1, outwidth3);
1281                 }
1282         }
1283         Mem_Free(resamplerow1);
1284         resamplerow1 = NULL;
1285         resamplerow2 = NULL;
1286 }
1287
1288 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1289 {
1290         int i, j, f, inwidth3 = inwidth * 3;
1291         unsigned frac, fracstep;
1292         unsigned char *inrow, *out;
1293         out = (unsigned char *)outdata;
1294
1295         fracstep = inwidth*0x10000/outwidth;
1296         for (i = 0;i < outheight;i++)
1297         {
1298                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1299                 frac = fracstep >> 1;
1300                 j = outwidth - 4;
1301                 while (j >= 0)
1302                 {
1303                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1304                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1305                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1306                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1307                         j -= 4;
1308                 }
1309                 if (j & 2)
1310                 {
1311                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1312                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1313                         out += 2;
1314                 }
1315                 if (j & 1)
1316                 {
1317                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1318                         out += 1;
1319                 }
1320         }
1321 }
1322
1323 /*
1324 ================
1325 Image_Resample
1326 ================
1327 */
1328 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1329 {
1330         if (indepth != 1 || outdepth != 1)
1331         {
1332                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1333                 return;
1334         }
1335         if (bytesperpixel == 4)
1336         {
1337                 if (quality)
1338                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1339                 else
1340                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1341         }
1342         else if (bytesperpixel == 3)
1343         {
1344                 if (quality)
1345                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1346                 else
1347                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1348         }
1349         else
1350                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1351 }
1352
1353 // in can be the same as out
1354 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1355 {
1356         int x, y, nextrow;
1357         if (*depth != 1 || destdepth != 1)
1358         {
1359                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1360                 return;
1361         }
1362         nextrow = *width * bytesperpixel;
1363         if (*width > destwidth)
1364         {
1365                 *width >>= 1;
1366                 if (*height > destheight)
1367                 {
1368                         // reduce both
1369                         *height >>= 1;
1370                         if (bytesperpixel == 4)
1371                         {
1372                                 for (y = 0;y < *height;y++)
1373                                 {
1374                                         for (x = 0;x < *width;x++)
1375                                         {
1376                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1377                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1378                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1379                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1380                                                 out += 4;
1381                                                 in += 8;
1382                                         }
1383                                         in += nextrow; // skip a line
1384                                 }
1385                         }
1386                         else if (bytesperpixel == 3)
1387                         {
1388                                 for (y = 0;y < *height;y++)
1389                                 {
1390                                         for (x = 0;x < *width;x++)
1391                                         {
1392                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1393                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1394                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1395                                                 out += 3;
1396                                                 in += 6;
1397                                         }
1398                                         in += nextrow; // skip a line
1399                                 }
1400                         }
1401                         else
1402                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1403                 }
1404                 else
1405                 {
1406                         // reduce width
1407                         if (bytesperpixel == 4)
1408                         {
1409                                 for (y = 0;y < *height;y++)
1410                                 {
1411                                         for (x = 0;x < *width;x++)
1412                                         {
1413                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1414                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1415                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1416                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1417                                                 out += 4;
1418                                                 in += 8;
1419                                         }
1420                                 }
1421                         }
1422                         else if (bytesperpixel == 3)
1423                         {
1424                                 for (y = 0;y < *height;y++)
1425                                 {
1426                                         for (x = 0;x < *width;x++)
1427                                         {
1428                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1429                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1430                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1431                                                 out += 3;
1432                                                 in += 6;
1433                                         }
1434                                 }
1435                         }
1436                         else
1437                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1438                 }
1439         }
1440         else
1441         {
1442                 if (*height > destheight)
1443                 {
1444                         // reduce height
1445                         *height >>= 1;
1446                         if (bytesperpixel == 4)
1447                         {
1448                                 for (y = 0;y < *height;y++)
1449                                 {
1450                                         for (x = 0;x < *width;x++)
1451                                         {
1452                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1453                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1454                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1455                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1456                                                 out += 4;
1457                                                 in += 4;
1458                                         }
1459                                         in += nextrow; // skip a line
1460                                 }
1461                         }
1462                         else if (bytesperpixel == 3)
1463                         {
1464                                 for (y = 0;y < *height;y++)
1465                                 {
1466                                         for (x = 0;x < *width;x++)
1467                                         {
1468                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1469                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1470                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1471                                                 out += 3;
1472                                                 in += 3;
1473                                         }
1474                                         in += nextrow; // skip a line
1475                                 }
1476                         }
1477                         else
1478                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1479                 }
1480                 else
1481                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1482         }
1483 }
1484
1485 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1486 {
1487         int x, y;
1488         const unsigned char *p0, *p1, *p2;
1489         unsigned char *out;
1490         float iwidth, iheight, ibumpscale, n[3];
1491         iwidth = 1.0f / width;
1492         iheight = 1.0f / height;
1493         ibumpscale = (255.0f * 3.0f) / bumpscale;
1494         out = outpixels;
1495         for (y = 0;y < height;y++)
1496         {
1497                 for (x = 0;x < width;x++)
1498                 {
1499                         p0 = inpixels + (y * width + x) * 4;
1500                         if (x == width - 1)
1501                         {
1502                                 if (clamp)
1503                                         p1 = inpixels + (y * width + x) * 4;
1504                                 else
1505                                         p1 = inpixels + (y * width) * 4;
1506                         }
1507                         else
1508                                 p1 = inpixels + (y * width + x + 1) * 4;
1509                         if (y == height - 1)
1510                         {
1511                                 if (clamp)
1512                                         p2 = inpixels + (y * width + x) * 4;
1513                                 else
1514                                         p2 = inpixels + x * 4;
1515                         }
1516                         else
1517                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1518                         /*
1519                         dv[0][0] = iwidth;
1520                         dv[0][1] = 0;
1521                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1522                         dv[1][0] = 0;
1523                         dv[1][1] = iheight;
1524                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1525                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1526                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1527                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1528                         */
1529                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1530                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1531                         n[2] = ibumpscale;
1532                         VectorNormalize(n);
1533                         /*
1534                         // this should work for the bottom right triangle if anyone wants
1535                         // code for that for some reason
1536                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1537                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1538                         n[2] = ibumpscale;
1539                         VectorNormalize(n);
1540                         */
1541                         out[0] = (int)(128.0f + n[0] * 127.0f);
1542                         out[1] = (int)(128.0f + n[1] * 127.0f);
1543                         out[2] = (int)(128.0f + n[2] * 127.0f);
1544                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1545                         out += 4;
1546                 }
1547         }
1548 }
1549
1550 int image_loadskin(imageskin_t *s, const char *shadername)
1551 {
1552         int j;
1553         unsigned char *bumppixels;
1554         int bumppixels_width, bumppixels_height;
1555         char name[MAX_QPATH];
1556         strlcpy(name, shadername, sizeof(name));
1557         Image_StripImageExtension(name, name);
1558         memset(s, 0, sizeof(*s));
1559         s->basepixels = loadimagepixels(name, false, 0, 0);
1560         if (s->basepixels == NULL)
1561                 return false;
1562         s->basepixels_width = image_width;
1563         s->basepixels_height = image_height;
1564
1565         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1566         for (j = 3;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1567                 if (s->basepixels[j] < 255)
1568                         break;
1569         if (j < s->basepixels_width * s->basepixels_height * 4)
1570         {
1571                 // has transparent pixels
1572                 s->maskpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1573                 s->maskpixels_width = s->basepixels_width;
1574                 s->maskpixels_height = s->basepixels_height;
1575                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1576                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1577                 {
1578                         s->maskpixels[j+0] = 255;
1579                         s->maskpixels[j+1] = 255;
1580                         s->maskpixels[j+2] = 255;
1581                 }
1582         }
1583
1584         // _luma is supported for tenebrae compatibility
1585         // (I think it's a very stupid name, but oh well)
1586         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1587          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1588         {
1589                 s->glowpixels_width = image_width;
1590                 s->glowpixels_height = image_height;
1591         }
1592         // _norm is the name used by tenebrae
1593         // (I don't like the name much)
1594         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1595         {
1596                 s->nmappixels_width = image_width;
1597                 s->nmappixels_height = image_height;
1598         }
1599         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1600         {
1601                 bumppixels_width = image_width;
1602                 bumppixels_height = image_height;
1603         }
1604         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1605         {
1606                 s->glosspixels_width = image_width;
1607                 s->glosspixels_height = image_height;
1608         }
1609         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1610         {
1611                 s->pantspixels_width = image_width;
1612                 s->pantspixels_height = image_height;
1613         }
1614         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1615         {
1616                 s->shirtpixels_width = image_width;
1617                 s->shirtpixels_height = image_height;
1618         }
1619
1620         if (s->nmappixels == NULL)
1621         {
1622                 if (bumppixels != NULL)
1623                 {
1624                         if (r_shadow_bumpscale_bumpmap.value > 0)
1625                         {
1626                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1627                                 s->nmappixels_width = bumppixels_width;
1628                                 s->nmappixels_height = bumppixels_height;
1629                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1630                         }
1631                 }
1632                 else
1633                 {
1634                         if (r_shadow_bumpscale_basetexture.value > 0)
1635                         {
1636                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1637                                 s->nmappixels_width = s->basepixels_width;
1638                                 s->nmappixels_height = s->basepixels_height;
1639                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1640                         }
1641                 }
1642         }
1643         if (bumppixels != NULL)
1644                 Mem_Free(bumppixels);
1645         return true;
1646 }
1647
1648 void image_freeskin(imageskin_t *s)
1649 {
1650         if (s->basepixels)
1651                 Mem_Free(s->basepixels);
1652         if (s->maskpixels)
1653                 Mem_Free(s->maskpixels);
1654         if (s->nmappixels)
1655                 Mem_Free(s->nmappixels);
1656         if (s->glowpixels)
1657                 Mem_Free(s->glowpixels);
1658         if (s->glosspixels)
1659                 Mem_Free(s->glosspixels);
1660         if (s->pantspixels)
1661                 Mem_Free(s->pantspixels);
1662         if (s->shirtpixels)
1663                 Mem_Free(s->shirtpixels);
1664         memset(s, 0, sizeof(*s));
1665 }
1666