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_Copy8bitBGRA(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_BGRA (const unsigned char *f, int filesize)
 185 {
 186         pcx_t pcx;
 187         unsigned char *a, *b, *image_buffer, *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
 220         palette = f + filesize - 768;
 221
 222         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
 223         if (!image_buffer)
 224         {
 225                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 226                 return NULL;
 227         }
 228         pbuf = image_buffer + image_width*image_height*3;
 229         enddata = palette;
 230
 231         for (y = 0;y < image_height && fin < enddata;y++)
 232         {
 233                 a = pbuf + y * image_width;
 234                 for (x = 0;x < image_width && fin < enddata;)
 235                 {
 236                         dataByte = *fin++;
 237                         if(dataByte >= 0xC0)
 238                         {
 239                                 if (fin >= enddata)
 240                                         break;
 241                                 x2 = x + (dataByte & 0x3F);
 242                                 dataByte = *fin++;
 243                                 if (x2 > image_width)
 244                                         x2 = image_width; // technically an error
 245                                 while(x < x2)
 246                                         a[x++] = dataByte;
 247                         }
 248                         else
 249                                 a[x++] = dataByte;
 250                 }
 251                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
 252                 while(x < image_width)
 253                         a[x++] = 0;
 254         }
 255
 256         a = image_buffer;
 257         b = pbuf;
 258
 259         for(x = 0;x < image_width*image_height;x++)
 260         {
 261                 y = *b++ * 3;
 262                 *a++ = palette[y+2];
 263                 *a++ = palette[y+1];
 264                 *a++ = palette[y];
 265                 *a++ = 255;
 266         }
 267
 268         return image_buffer;
 269 }
 270
 271 /*
 272 =========================================================
 273
 274 TARGA LOADING
 275
 276 =========================================================
 277 */
 278
 279 typedef struct _TargaHeader
 280 {
 281         unsigned char   id_length, colormap_type, image_type;
 282         unsigned short  colormap_index, colormap_length;
 283         unsigned char   colormap_size;
 284         unsigned short  x_origin, y_origin, width, height;
 285         unsigned char   pixel_size, attributes;
 286 }
 287 TargaHeader;
 288
 289 void PrintTargaHeader(TargaHeader *t)
 290 {
 291         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);
 292 }
 293
 294 /*
 295 =============
 296 LoadTGA
 297 =============
 298 */
 299 unsigned char *LoadTGA_BGRA (const unsigned char *f, int filesize)
 300 {
 301         int x, y, pix_inc, row_inci, runlen, alphabits;
 302         unsigned char *image_buffer;
 303         unsigned int *pixbufi;
 304         const unsigned char *fin, *enddata;
 305         TargaHeader targa_header;
 306         unsigned int palettei[256];
 307         union
 308         {
 309                 unsigned int i;
 310                 unsigned char b[4];
 311         }
 312         bgra;
 313
 314         if (filesize < 19)
 315                 return NULL;
 316
 317         enddata = f + filesize;
 318
 319         targa_header.id_length = f[0];
 320         targa_header.colormap_type = f[1];
 321         targa_header.image_type = f[2];
 322
 323         targa_header.colormap_index = f[3] + f[4] * 256;
 324         targa_header.colormap_length = f[5] + f[6] * 256;
 325         targa_header.colormap_size = f[7];
 326         targa_header.x_origin = f[8] + f[9] * 256;
 327         targa_header.y_origin = f[10] + f[11] * 256;
 328         targa_header.width = image_width = f[12] + f[13] * 256;
 329         targa_header.height = image_height = f[14] + f[15] * 256;
 330         targa_header.pixel_size = f[16];
 331         targa_header.attributes = f[17];
 332
 333         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 334         {
 335                 Con_Print("LoadTGA: invalid size\n");
 336                 PrintTargaHeader(&targa_header);
 337                 return NULL;
 338         }
 339
 340         // advance to end of header
 341         fin = f + 18;
 342
 343         // skip TARGA image comment (usually 0 bytes)
 344         fin += targa_header.id_length;
 345
 346         // read/skip the colormap if present (note: according to the TARGA spec it
 347         // can be present even on truecolor or greyscale images, just not used by
 348         // the image data)
 349         if (targa_header.colormap_type)
 350         {
 351                 if (targa_header.colormap_length > 256)
 352                 {
 353                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 354                         PrintTargaHeader(&targa_header);
 355                         return NULL;
 356                 }
 357                 if (targa_header.colormap_index)
 358                 {
 359                         Con_Print("LoadTGA: colormap_index not supported\n");
 360                         PrintTargaHeader(&targa_header);
 361                         return NULL;
 362                 }
 363                 if (targa_header.colormap_size == 24)
 364                 {
 365                         for (x = 0;x < targa_header.colormap_length;x++)
 366                         {
 367                                 bgra.b[0] = *fin++;
 368                                 bgra.b[1] = *fin++;
 369                                 bgra.b[2] = *fin++;
 370                                 bgra.b[3] = 255;
 371                                 palettei[x] = bgra.i;
 372                         }
 373                 }
 374                 else if (targa_header.colormap_size == 32)
 375                 {
 376                         memcpy(palettei, fin, targa_header.colormap_length*4);
 377                         fin += targa_header.colormap_length * 4;
 378                 }
 379                 else
 380                 {
 381                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 382                         PrintTargaHeader(&targa_header);
 383                         return NULL;
 384                 }
 385         }
 386
 387         // check our pixel_size restrictions according to image_type
 388         switch (targa_header.image_type & ~8)
 389         {
 390         case 2:
 391                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 392                 {
 393                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 394                         PrintTargaHeader(&targa_header);
 395                         return NULL;
 396                 }
 397                 break;
 398         case 3:
 399                 // set up a palette to make the loader easier
 400                 for (x = 0;x < 256;x++)
 401                 {
 402                         bgra.b[0] = bgra.b[1] = bgra.b[2] = x;
 403                         bgra.b[3] = 255;
 404                         palettei[x] = bgra.i;
 405                 }
 406                 // fall through to colormap case
 407         case 1:
 408                 if (targa_header.pixel_size != 8)
 409                 {
 410                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 411                         PrintTargaHeader(&targa_header);
 412                         return NULL;
 413                 }
 414                 break;
 415         default:
 416                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 417                 PrintTargaHeader(&targa_header);
 418                 return NULL;
 419         }
 420
 421         if (targa_header.attributes & 0x10)
 422         {
 423                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 424                 return NULL;
 425         }
 426
 427         // number of attribute bits per pixel, we only support 0 or 8
 428         alphabits = targa_header.attributes & 0x0F;
 429         if (alphabits != 8 && alphabits != 0)
 430         {
 431                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
 432                 return NULL;
 433         }
 434
 435         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 436         if (!image_buffer)
 437         {
 438                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 439                 return NULL;
 440         }
 441
 442         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 443         if ((targa_header.attributes & 0x20) == 0)
 444         {
 445                 pixbufi = (unsigned int*)image_buffer + (image_height - 1)*image_width;
 446                 row_inci = -image_width*2;
 447         }
 448         else
 449         {
 450                 pixbufi = (unsigned int*)image_buffer;
 451                 row_inci = 0;
 452         }
 453
 454         x = 0;
 455         y = 0;
 456         pix_inc = 1;
 457         if ((targa_header.image_type & ~8) == 2)
 458                 pix_inc = (targa_header.pixel_size + 7) / 8;
 459         switch (targa_header.image_type)
 460         {
 461         case 1: // colormapped, uncompressed
 462         case 3: // greyscale, uncompressed
 463                 if (fin + image_width * image_height * pix_inc > enddata)
 464                         break;
 465                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
 466                         for (x = 0;x < image_width;x++)
 467                                 *pixbufi++ = palettei[*fin++];
 468                 break;
 469         case 2:
 470                 // BGR or BGRA, uncompressed
 471                 if (fin + image_width * image_height * pix_inc > enddata)
 472                         break;
 473                 if (targa_header.pixel_size == 32 && alphabits)
 474                 {
 475                         for (y = 0;y < image_height;y++)
 476                                 memcpy(pixbufi + y * (image_width + row_inci), fin + y * image_width * pix_inc, image_width*4);
 477                 }
 478                 else
 479                 {
 480                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 481                         {
 482                                 for (x = 0;x < image_width;x++, fin += pix_inc)
 483                                 {
 484                                         bgra.b[0] = fin[0];
 485                                         bgra.b[1] = fin[1];
 486                                         bgra.b[2] = fin[2];
 487                                         bgra.b[3] = 255;
 488                                         *pixbufi++ = bgra.i;
 489                                 }
 490                         }
 491                 }
 492                 break;
 493         case 9: // colormapped, RLE
 494         case 11: // greyscale, RLE
 495                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
 496                 {
 497                         for (x = 0;x < image_width;)
 498                         {
 499                                 if (fin >= enddata)
 500                                         break; // error - truncated file
 501                                 runlen = *fin++;
 502                                 if (runlen & 0x80)
 503                                 {
 504                                         // RLE - all pixels the same color
 505                                         runlen += 1 - 0x80;
 506                                         if (fin + pix_inc > enddata)
 507                                                 break; // error - truncated file
 508                                         if (x + runlen > image_width)
 509                                                 break; // error - line exceeds width
 510                                         bgra.i = palettei[*fin++];
 511                                         for (;runlen--;x++)
 512                                                 *pixbufi++ = bgra.i;
 513                                 }
 514                                 else
 515                                 {
 516                                         // uncompressed - all pixels different color
 517                                         runlen++;
 518                                         if (fin + pix_inc * runlen > enddata)
 519                                                 break; // error - truncated file
 520                                         if (x + runlen > image_width)
 521                                                 break; // error - line exceeds width
 522                                         for (;runlen--;x++)
 523                                                 *pixbufi++ = palettei[*fin++];
 524                                 }
 525                         }
 526                 }
 527                 break;
 528         case 10:
 529                 // BGR or BGRA, RLE
 530                 if (targa_header.pixel_size == 32 && alphabits)
 531                 {
 532                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 533                         {
 534                                 for (x = 0;x < image_width;)
 535                                 {
 536                                         if (fin >= enddata)
 537                                                 break; // error - truncated file
 538                                         runlen = *fin++;
 539                                         if (runlen & 0x80)
 540                                         {
 541                                                 // RLE - all pixels the same color
 542                                                 runlen += 1 - 0x80;
 543                                                 if (fin + pix_inc > enddata)
 544                                                         break; // error - truncated file
 545                                                 if (x + runlen > image_width)
 546                                                         break; // error - line exceeds width
 547                                                 bgra.b[0] = fin[0];
 548                                                 bgra.b[1] = fin[1];
 549                                                 bgra.b[2] = fin[2];
 550                                                 bgra.b[3] = fin[3];
 551                                                 fin += pix_inc;
 552                                                 for (;runlen--;x++)
 553                                                         *pixbufi++ = bgra.i;
 554                                         }
 555                                         else
 556                                         {
 557                                                 // uncompressed - all pixels different color
 558                                                 runlen++;
 559                                                 if (fin + pix_inc * runlen > enddata)
 560                                                         break; // error - truncated file
 561                                                 if (x + runlen > image_width)
 562                                                         break; // error - line exceeds width
 563                                                 for (;runlen--;x++)
 564                                                 {
 565                                                         bgra.b[0] = fin[0];
 566                                                         bgra.b[1] = fin[1];
 567                                                         bgra.b[2] = fin[2];
 568                                                         bgra.b[3] = fin[3];
 569                                                         fin += pix_inc;
 570                                                         *pixbufi++ = bgra.i;
 571                                                 }
 572                                         }
 573                                 }
 574                         }
 575                 }
 576                 else
 577                 {
 578                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 579                         {
 580                                 for (x = 0;x < image_width;)
 581                                 {
 582                                         if (fin >= enddata)
 583                                                 break; // error - truncated file
 584                                         runlen = *fin++;
 585                                         if (runlen & 0x80)
 586                                         {
 587                                                 // RLE - all pixels the same color
 588                                                 runlen += 1 - 0x80;
 589                                                 if (fin + pix_inc > enddata)
 590                                                         break; // error - truncated file
 591                                                 if (x + runlen > image_width)
 592                                                         break; // error - line exceeds width
 593                                                 bgra.b[0] = fin[0];
 594                                                 bgra.b[1] = fin[1];
 595                                                 bgra.b[2] = fin[2];
 596                                                 bgra.b[3] = 255;
 597                                                 fin += pix_inc;
 598                                                 for (;runlen--;x++)
 599                                                         *pixbufi++ = bgra.i;
 600                                         }
 601                                         else
 602                                         {
 603                                                 // uncompressed - all pixels different color
 604                                                 runlen++;
 605                                                 if (fin + pix_inc * runlen > enddata)
 606                                                         break; // error - truncated file
 607                                                 if (x + runlen > image_width)
 608                                                         break; // error - line exceeds width
 609                                                 for (;runlen--;x++)
 610                                                 {
 611                                                         bgra.b[0] = fin[0];
 612                                                         bgra.b[1] = fin[1];
 613                                                         bgra.b[2] = fin[2];
 614                                                         bgra.b[3] = 255;
 615                                                         fin += pix_inc;
 616                                                         *pixbufi++ = bgra.i;
 617                                                 }
 618                                         }
 619                                 }
 620                         }
 621                 }
 622                 break;
 623         default:
 624                 // unknown image_type
 625                 break;
 626         }
 627
 628         return image_buffer;
 629 }
 630
 631 typedef struct q2wal_s
 632 {
 633         char            name[32];
 634         unsigned        width, height;
 635         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 636         char            animname[32];                   // next frame in animation chain
 637         int                     flags;
 638         int                     contents;
 639         int                     value;
 640 } q2wal_t;
 641
 642 unsigned char *LoadWAL_BGRA (const unsigned char *f, int filesize)
 643 {
 644         unsigned char *image_buffer;
 645         const q2wal_t *inwal = (const q2wal_t *)f;
 646
 647         if (filesize < (int) sizeof(q2wal_t))
 648         {
 649                 Con_Print("LoadWAL: invalid WAL file\n");
 650                 return NULL;
 651         }
 652
 653         image_width = LittleLong(inwal->width);
 654         image_height = LittleLong(inwal->height);
 655         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 656         {
 657                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 658                 return NULL;
 659         }
 660
 661         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 662         {
 663                 Con_Print("LoadWAL: invalid WAL file\n");
 664                 return NULL;
 665         }
 666
 667         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 668         if (!image_buffer)
 669         {
 670                 Con_Printf("LoadWAL: not enough memory for %i by %i image\n", image_width, image_height);
 671                 return NULL;
 672         }
 673         Image_Copy8bitBGRA(f + LittleLong(inwal->offsets[0]), image_buffer, image_width * image_height, palette_bgra_complete);
 674         return image_buffer;
 675 }
 676
 677
 678 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
 679 {
 680         const char *ext;
 681
 682         if (size_out == 0)
 683                 return;
 684
 685         ext = FS_FileExtension(in);
 686         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
 687                 FS_StripExtension(in, out, size_out);
 688         else
 689                 strlcpy(out, in, size_out);
 690 }
 691
 692 typedef struct imageformat_s
 693 {
 694         const char *formatstring;
 695         unsigned char *(*loadfunc)(const unsigned char *f, int filesize);
 696 }
 697 imageformat_t;
 698
 699 // GAME_TENEBRAE only
 700 imageformat_t imageformats_tenebrae[] =
 701 {
 702         {"override/%s.tga", LoadTGA_BGRA},
 703         {"override/%s.png", PNG_LoadImage_BGRA},
 704         {"override/%s.jpg", JPEG_LoadImage_BGRA},
 705         {"override/%s.pcx", LoadPCX_BGRA},
 706         {NULL, NULL}
 707 };
 708
 709 imageformat_t imageformats_nopath[] =
 710 {
 711         {"override/%s.tga", LoadTGA_BGRA},
 712         {"override/%s.png", PNG_LoadImage_BGRA},
 713         {"override/%s.jpg", JPEG_LoadImage_BGRA},
 714         {"textures/%s.tga", LoadTGA_BGRA},
 715         {"textures/%s.png", PNG_LoadImage_BGRA},
 716         {"textures/%s.jpg", JPEG_LoadImage_BGRA},
 717         {"%s.tga", LoadTGA_BGRA},
 718         {"%s.png", PNG_LoadImage_BGRA},
 719         {"%s.jpg", JPEG_LoadImage_BGRA},
 720         {"%s.pcx", LoadPCX_BGRA},
 721         {NULL, NULL}
 722 };
 723
 724 // GAME_DELUXEQUAKE only
 725 // VorteX: the point why i use such messy texture paths is
 726 // that GtkRadiant can't detect normal/gloss textures
 727 // and exclude them from texture browser
 728 // so i just use additional folder to store this textures
 729 imageformat_t imageformats_dq[] =
 730 {
 731         {"%s.tga", LoadTGA_BGRA},
 732         {"%s.jpg", JPEG_LoadImage_BGRA},
 733         {"texturemaps/%s.tga", LoadTGA_BGRA},
 734         {"texturemaps/%s.jpg", JPEG_LoadImage_BGRA},
 735         {NULL, NULL}
 736 };
 737
 738 imageformat_t imageformats_textures[] =
 739 {
 740         {"%s.tga", LoadTGA_BGRA},
 741         {"%s.png", PNG_LoadImage_BGRA},
 742         {"%s.jpg", JPEG_LoadImage_BGRA},
 743         {"%s.pcx", LoadPCX_BGRA},
 744         {"%s.wal", LoadWAL_BGRA},
 745         {NULL, NULL}
 746 };
 747
 748 imageformat_t imageformats_gfx[] =
 749 {
 750         {"%s.tga", LoadTGA_BGRA},
 751         {"%s.png", PNG_LoadImage_BGRA},
 752         {"%s.jpg", JPEG_LoadImage_BGRA},
 753         {"%s.pcx", LoadPCX_BGRA},
 754         {NULL, NULL}
 755 };
 756
 757 imageformat_t imageformats_other[] =
 758 {
 759         {"%s.tga", LoadTGA_BGRA},
 760         {"%s.png", PNG_LoadImage_BGRA},
 761         {"%s.jpg", JPEG_LoadImage_BGRA},
 762         {"%s.pcx", LoadPCX_BGRA},
 763         {NULL, NULL}
 764 };
 765
 766 int fixtransparentpixels(unsigned char *data, int w, int h);
 767 unsigned char *loadimagepixelsbgra (const char *filename, qboolean complain, qboolean allowFixtrans)
 768 {
 769         fs_offset_t filesize;
 770         imageformat_t *firstformat, *format;
 771         unsigned char *f, *data = NULL;
 772         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 773         if (developer_memorydebug.integer)
 774                 Mem_CheckSentinelsGlobal();
 775         if (developer_texturelogging.integer)
 776                 Log_Printf("textures.log", "%s\n", filename);
 777         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
 778         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 779         for (c = basename;*c;c++)
 780                 if (*c == '*')
 781                         *c = '#';
 782         name[0] = 0;
 783         if (strchr(basename, '/'))
 784         {
 785                 int i;
 786                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
 787                         name[i] = basename[i];
 788                 name[i] = 0;
 789         }
 790         if (gamemode == GAME_TENEBRAE)
 791                 firstformat = imageformats_tenebrae;
 792         else if (gamemode == GAME_DELUXEQUAKE)
 793                 firstformat = imageformats_dq;
 794         else if (!strcasecmp(name, "textures"))
 795                 firstformat = imageformats_textures;
 796         else if (!strcasecmp(name, "gfx"))
 797                 firstformat = imageformats_gfx;
 798         else if (!strchr(basename, '/'))
 799                 firstformat = imageformats_nopath;
 800         else
 801                 firstformat = imageformats_other;
 802         // now try all the formats in the selected list
 803         for (format = firstformat;format->formatstring;format++)
 804         {
 805                 sprintf (name, format->formatstring, basename);
 806                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 807                 if (f)
 808                 {
 809                         data = format->loadfunc(f, filesize);
 810                         Mem_Free(f);
 811                         if (data)
 812                         {
 813                                 if (developer.integer >= 10)
 814                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 815                                 if (developer_memorydebug.integer)
 816                                         Mem_CheckSentinelsGlobal();
 817                                 if(allowFixtrans && r_fixtrans_auto.integer)
 818                                 {
 819                                         int n = fixtransparentpixels(data, image_width, image_height);
 820                                         if(n)
 821                                         {
 822                                                 Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
 823                                                 if(r_fixtrans_auto.integer >= 2)
 824                                                 {
 825                                                         char outfilename[MAX_QPATH], buf[MAX_QPATH];
 826                                                         Image_StripImageExtension(name, buf, sizeof(buf));
 827                                                         dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
 828                                                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
 829                                                         Con_Printf("- %s written.\n", outfilename);
 830                                                 }
 831                                         }
 832                                 }
 833                                 return data;
 834                         }
 835                         else
 836                         {
 837                                 if (developer.integer >= 1)
 838                                         Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
 839                         }
 840                 }
 841         }
 842         if (complain)
 843         {
 844                 Con_Printf("Couldn't load %s using ", filename);
 845                 for (format = firstformat;format->formatstring;format++)
 846                 {
 847                         sprintf (name, format->formatstring, basename);
 848                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
 849                 }
 850         }
 851         if (developer_memorydebug.integer)
 852                 Mem_CheckSentinelsGlobal();
 853         return NULL;
 854 }
 855
 856 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans)
 857 {
 858         unsigned char *data;
 859         rtexture_t *rt;
 860         if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans)))
 861                 return 0;
 862         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_BGRA, flags, NULL);
 863         Mem_Free(data);
 864         return rt;
 865 }
 866
 867 int fixtransparentpixels(unsigned char *data, int w, int h)
 868 {
 869         int const FIXTRANS_NEEDED = 1;
 870         int const FIXTRANS_HAS_L = 2;
 871         int const FIXTRANS_HAS_R = 4;
 872         int const FIXTRANS_HAS_U = 8;
 873         int const FIXTRANS_HAS_D = 16;
 874         int const FIXTRANS_FIXED = 32;
 875         unsigned char *fixMask = Mem_Alloc(tempmempool, w * h);
 876         int fixPixels = 0;
 877         int changedPixels = 0;
 878         int x, y;
 879
 880 #define FIXTRANS_PIXEL (y*w+x)
 881 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
 882 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
 883 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
 884 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
 885
 886         memset(fixMask, 0, w * h);
 887         for(y = 0; y < h; ++y)
 888                 for(x = 0; x < w; ++x)
 889                 {
 890                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
 891                         {
 892                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
 893                                 ++fixPixels;
 894                         }
 895                         else
 896                         {
 897                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
 898                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
 899                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
 900                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
 901                         }
 902                 }
 903         if(fixPixels == w * h)
 904                 return 0; // sorry, can't do anything about this
 905         while(fixPixels)
 906         {
 907                 for(y = 0; y < h; ++y)
 908                         for(x = 0; x < w; ++x)
 909                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
 910                                 {
 911                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
 912                                         unsigned char r, g, b, a, r0, g0, b0;
 913                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
 914                                         {
 915                                                 r = data[FIXTRANS_PIXEL_U * 4 + 2];
 916                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
 917                                                 b = data[FIXTRANS_PIXEL_U * 4 + 0];
 918                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
 919                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
 920                                         }
 921                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
 922                                         {
 923                                                 r = data[FIXTRANS_PIXEL_D * 4 + 2];
 924                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
 925                                                 b = data[FIXTRANS_PIXEL_D * 4 + 0];
 926                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
 927                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
 928                                         }
 929                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
 930                                         {
 931                                                 r = data[FIXTRANS_PIXEL_L * 4 + 2];
 932                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
 933                                                 b = data[FIXTRANS_PIXEL_L * 4 + 0];
 934                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
 935                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
 936                                         }
 937                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
 938                                         {
 939                                                 r = data[FIXTRANS_PIXEL_R * 4 + 2];
 940                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
 941                                                 b = data[FIXTRANS_PIXEL_R * 4 + 0];
 942                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
 943                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
 944                                         }
 945                                         if(!cnt)
 946                                                 continue;
 947                                         r0 = data[FIXTRANS_PIXEL * 4 + 2];
 948                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
 949                                         b0 = data[FIXTRANS_PIXEL * 4 + 0];
 950                                         if(sumA)
 951                                         {
 952                                                 // there is a surrounding non-alpha pixel
 953                                                 r = (sumRA + sumA / 2) / sumA;
 954                                                 g = (sumGA + sumA / 2) / sumA;
 955                                                 b = (sumBA + sumA / 2) / sumA;
 956                                         }
 957                                         else
 958                                         {
 959                                                 // need to use a "regular" average
 960                                                 r = (sumR + cnt / 2) / cnt;
 961                                                 g = (sumG + cnt / 2) / cnt;
 962                                                 b = (sumB + cnt / 2) / cnt;
 963                                         }
 964                                         if(r != r0 || g != g0 || b != b0)
 965                                                 ++changedPixels;
 966                                         data[FIXTRANS_PIXEL * 4 + 2] = r;
 967                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
 968                                         data[FIXTRANS_PIXEL * 4 + 0] = b;
 969                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
 970                                 }
 971                 for(y = 0; y < h; ++y)
 972                         for(x = 0; x < w; ++x)
 973                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
 974                                 {
 975                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
 976                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
 977                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
 978                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
 979                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
 980                                         --fixPixels;
 981                                 }
 982         }
 983         return changedPixels;
 984 }
 985
 986 void Image_FixTransparentPixels_f(void)
 987 {
 988         const char *filename, *filename_pattern;
 989         fssearch_t *search;
 990         int i, n;
 991         char outfilename[MAX_QPATH], buf[MAX_QPATH];
 992         unsigned char *data;
 993         if(Cmd_Argc() != 2)
 994         {
 995                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
 996                 return;
 997         }
 998         filename_pattern = Cmd_Argv(1);
 999         search = FS_Search(filename_pattern, true, true);
1000         if(!search)
1001                 return;
1002         for(i = 0; i < search->numfilenames; ++i)
1003         {
1004                 filename = search->filenames[i];
1005                 Con_Printf("Processing %s... ", filename);
1006                 Image_StripImageExtension(filename, buf, sizeof(buf));
1007                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1008                 if(!(data = loadimagepixelsbgra(filename, true, false)))
1009                         return;
1010                 if((n = fixtransparentpixels(data, image_width, image_height)))
1011                 {
1012                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1013                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1014                 }
1015                 else
1016                         Con_Printf("unchanged.\n");
1017                 Mem_Free(data);
1018         }
1019 }
1020
1021 qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
1022 {
1023         qboolean ret;
1024
1025         memset (buffer, 0, 18);
1026         buffer[2] = 2;          // uncompressed type
1027         buffer[12] = (width >> 0) & 0xFF;
1028         buffer[13] = (width >> 8) & 0xFF;
1029         buffer[14] = (height >> 0) & 0xFF;
1030         buffer[15] = (height >> 8) & 0xFF;
1031         buffer[16] = 24;        // pixel size
1032
1033         // swap rgb to bgr
1034         memcpy(buffer + 18, data, width*height*3);
1035         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
1036
1037         return ret;
1038 }
1039
1040 void Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
1041 {
1042         int y;
1043         unsigned char *buffer, *out;
1044         const unsigned char *in, *end;
1045
1046         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1047
1048         memset (buffer, 0, 18);
1049         buffer[2] = 2;          // uncompressed type
1050         buffer[12] = (width >> 0) & 0xFF;
1051         buffer[13] = (width >> 8) & 0xFF;
1052         buffer[14] = (height >> 0) & 0xFF;
1053         buffer[15] = (height >> 8) & 0xFF;
1054
1055         for (y = 3;y < width*height*4;y += 4)
1056                 if (data[y] < 255)
1057                         break;
1058
1059         if (y < width*height*4)
1060         {
1061                 // save the alpha channel
1062                 buffer[16] = 32;        // pixel size
1063                 buffer[17] = 8; // 8 bits of alpha
1064
1065                 // flip upside down
1066                 out = buffer + 18;
1067                 for (y = height - 1;y >= 0;y--)
1068                 {
1069                         memcpy(out, data + y * width * 4, width * 4);
1070                         out += width*4;
1071                 }
1072         }
1073         else
1074         {
1075                 // save only the color channels
1076                 buffer[16] = 24;        // pixel size
1077                 buffer[17] = 0; // 8 bits of alpha
1078
1079                 // truncate bgra to bgr and flip upside down
1080                 out = buffer + 18;
1081                 for (y = height - 1;y >= 0;y--)
1082                 {
1083                         in = data + y * width * 4;
1084                         end = in + width * 4;
1085                         for (;in < end;in += 4)
1086                         {
1087                                 *out++ = in[0];
1088                                 *out++ = in[1];
1089                                 *out++ = in[2];
1090                         }
1091                 }
1092         }
1093         FS_WriteFile (filename, buffer, out - buffer);
1094
1095         Mem_Free(buffer);
1096 }
1097
1098 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1099 {
1100         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1101         fstep = (int) (inwidth*65536.0f/outwidth);
1102         endx = (inwidth-1);
1103         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1104         {
1105                 xi = f >> 16;
1106                 if (xi != oldx)
1107                 {
1108                         in += (xi - oldx) * 4;
1109                         oldx = xi;
1110                 }
1111                 if (xi < endx)
1112                 {
1113                         lerp = f & 0xFFFF;
1114                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1115                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1116                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1117                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1118                 }
1119                 else // last pixel of the line has no pixel to lerp to
1120                 {
1121                         *out++ = in[0];
1122                         *out++ = in[1];
1123                         *out++ = in[2];
1124                         *out++ = in[3];
1125                 }
1126         }
1127 }
1128
1129 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1130 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1131 {
1132         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1133         unsigned char *out;
1134         const unsigned char *inrow;
1135         unsigned char *resamplerow1;
1136         unsigned char *resamplerow2;
1137         out = (unsigned char *)outdata;
1138         fstep = (int) (inheight*65536.0f/outheight);
1139
1140         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1141         resamplerow2 = resamplerow1 + outwidth*4;
1142
1143         inrow = (const unsigned char *)indata;
1144         oldy = 0;
1145         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1146         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1147         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1148         {
1149                 yi = f >> 16;
1150                 if (yi < endy)
1151                 {
1152                         lerp = f & 0xFFFF;
1153                         if (yi != oldy)
1154                         {
1155                                 inrow = (unsigned char *)indata + inwidth4*yi;
1156                                 if (yi == oldy+1)
1157                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1158                                 else
1159                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1160                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1161                                 oldy = yi;
1162                         }
1163                         j = outwidth - 4;
1164                         while(j >= 0)
1165                         {
1166                                 LERPBYTE( 0);
1167                                 LERPBYTE( 1);
1168                                 LERPBYTE( 2);
1169                                 LERPBYTE( 3);
1170                                 LERPBYTE( 4);
1171                                 LERPBYTE( 5);
1172                                 LERPBYTE( 6);
1173                                 LERPBYTE( 7);
1174                                 LERPBYTE( 8);
1175                                 LERPBYTE( 9);
1176                                 LERPBYTE(10);
1177                                 LERPBYTE(11);
1178                                 LERPBYTE(12);
1179                                 LERPBYTE(13);
1180                                 LERPBYTE(14);
1181                                 LERPBYTE(15);
1182                                 out += 16;
1183                                 resamplerow1 += 16;
1184                                 resamplerow2 += 16;
1185                                 j -= 4;
1186                         }
1187                         if (j & 2)
1188                         {
1189                                 LERPBYTE( 0);
1190                                 LERPBYTE( 1);
1191                                 LERPBYTE( 2);
1192                                 LERPBYTE( 3);
1193                                 LERPBYTE( 4);
1194                                 LERPBYTE( 5);
1195                                 LERPBYTE( 6);
1196                                 LERPBYTE( 7);
1197                                 out += 8;
1198                                 resamplerow1 += 8;
1199                                 resamplerow2 += 8;
1200                         }
1201                         if (j & 1)
1202                         {
1203                                 LERPBYTE( 0);
1204                                 LERPBYTE( 1);
1205                                 LERPBYTE( 2);
1206                                 LERPBYTE( 3);
1207                                 out += 4;
1208                                 resamplerow1 += 4;
1209                                 resamplerow2 += 4;
1210                         }
1211                         resamplerow1 -= outwidth4;
1212                         resamplerow2 -= outwidth4;
1213                 }
1214                 else
1215                 {
1216                         if (yi != oldy)
1217                         {
1218                                 inrow = (unsigned char *)indata + inwidth4*yi;
1219                                 if (yi == oldy+1)
1220                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1221                                 else
1222                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1223                                 oldy = yi;
1224                         }
1225                         memcpy(out, resamplerow1, outwidth4);
1226                 }
1227         }
1228
1229         Mem_Free(resamplerow1);
1230         resamplerow1 = NULL;
1231         resamplerow2 = NULL;
1232 }
1233
1234 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1235 {
1236         int i, j;
1237         unsigned frac, fracstep;
1238         // relies on int being 4 bytes
1239         int *inrow, *out;
1240         out = (int *)outdata;
1241
1242         fracstep = inwidth*0x10000/outwidth;
1243         for (i = 0;i < outheight;i++)
1244         {
1245                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1246                 frac = fracstep >> 1;
1247                 j = outwidth - 4;
1248                 while (j >= 0)
1249                 {
1250                         out[0] = inrow[frac >> 16];frac += fracstep;
1251                         out[1] = inrow[frac >> 16];frac += fracstep;
1252                         out[2] = inrow[frac >> 16];frac += fracstep;
1253                         out[3] = inrow[frac >> 16];frac += fracstep;
1254                         out += 4;
1255                         j -= 4;
1256                 }
1257                 if (j & 2)
1258                 {
1259                         out[0] = inrow[frac >> 16];frac += fracstep;
1260                         out[1] = inrow[frac >> 16];frac += fracstep;
1261                         out += 2;
1262                 }
1263                 if (j & 1)
1264                 {
1265                         out[0] = inrow[frac >> 16];frac += fracstep;
1266                         out += 1;
1267                 }
1268         }
1269 }
1270
1271 /*
1272 ================
1273 Image_Resample
1274 ================
1275 */
1276 void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
1277 {
1278         if (indepth != 1 || outdepth != 1)
1279         {
1280                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1281                 return;
1282         }
1283         if (quality)
1284                 Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1285         else
1286                 Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1287 }
1288
1289 // in can be the same as out
1290 void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
1291 {
1292         const unsigned char *inrow;
1293         int x, y, nextrow;
1294         if (*depth != 1 || destdepth != 1)
1295         {
1296                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1297                 if (*width > destwidth)
1298                         *width >>= 1;
1299                 if (*height > destheight)
1300                         *height >>= 1;
1301                 if (*depth > destdepth)
1302                         *depth >>= 1;
1303                 return;
1304         }
1305         // note: if given odd width/height this discards the last row/column of
1306         // pixels, rather than doing a proper box-filter scale down
1307         inrow = in;
1308         nextrow = *width * 4;
1309         if (*width > destwidth)
1310         {
1311                 *width >>= 1;
1312                 if (*height > destheight)
1313                 {
1314                         // reduce both
1315                         *height >>= 1;
1316                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1317                         {
1318                                 for (in = inrow, x = 0;x < *width;x++)
1319                                 {
1320                                         out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1321                                         out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1322                                         out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1323                                         out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1324                                         out += 4;
1325                                         in += 8;
1326                                 }
1327                         }
1328                 }
1329                 else
1330                 {
1331                         // reduce width
1332                         for (y = 0;y < *height;y++, inrow += nextrow)
1333                         {
1334                                 for (in = inrow, x = 0;x < *width;x++)
1335                                 {
1336                                         out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1337                                         out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1338                                         out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1339                                         out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1340                                         out += 4;
1341                                         in += 8;
1342                                 }
1343                         }
1344                 }
1345         }
1346         else
1347         {
1348                 if (*height > destheight)
1349                 {
1350                         // reduce height
1351                         *height >>= 1;
1352                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1353                         {
1354                                 for (in = inrow, x = 0;x < *width;x++)
1355                                 {
1356                                         out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1357                                         out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1358                                         out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1359                                         out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1360                                         out += 4;
1361                                         in += 4;
1362                                 }
1363                         }
1364                 }
1365                 else
1366                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1367         }
1368 }
1369
1370 void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1371 {
1372         int x, y, x1, x2, y1, y2;
1373         const unsigned char *b, *row[3];
1374         int p[5];
1375         unsigned char *out;
1376         float iwidth, iheight, ibumpscale, n[3];
1377         iwidth = 1.0f / width;
1378         iheight = 1.0f / height;
1379         ibumpscale = (255.0f * 6.0f) / bumpscale;
1380         out = outpixels;
1381         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1382         {
1383                 y2 = y + 1;if (y2 >= height) y2 = 0;
1384                 row[0] = inpixels + (y1 * width) * 4;
1385                 row[1] = inpixels + (y  * width) * 4;
1386                 row[2] = inpixels + (y2 * width) * 4;
1387                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1388                 {
1389                         x2 = x + 1;if (x2 >= width) x2 = 0;
1390                         // left, right
1391                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1392                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1393                         // above, below
1394                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1395                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1396                         // center
1397                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1398                         // calculate a normal from the slopes
1399                         n[0] = p[0] - p[1];
1400                         n[1] = p[3] - p[2];
1401                         n[2] = ibumpscale;
1402                         VectorNormalize(n);
1403                         // turn it into a dot3 rgb vector texture
1404                         out[2] = (int)(128.0f + n[0] * 127.0f);
1405                         out[1] = (int)(128.0f + n[1] * 127.0f);
1406                         out[0] = (int)(128.0f + n[2] * 127.0f);
1407                         out[3] = (p[4]) / 3;
1408                         out += 4;
1409                 }
1410         }
1411 }