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
 716 typedef struct q2wal_s
 717 {
 718         char            name[32];
 719         unsigned        width, height;
 720         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 721         char            animname[32];                   // next frame in animation chain
 722         int                     flags;
 723         int                     contents;
 724         int                     value;
 725 } q2wal_t;
 726
 727 unsigned char *LoadWAL (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 728 {
 729         unsigned char *image_rgba;
 730         const q2wal_t *inwal = (const q2wal_t *)f;
 731
 732         if (filesize < (int) sizeof(q2wal_t))
 733         {
 734                 Con_Print("LoadWAL: invalid WAL file\n");
 735                 return NULL;
 736         }
 737
 738         image_width = LittleLong(inwal->width);
 739         image_height = LittleLong(inwal->height);
 740         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 741         {
 742                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 743                 return NULL;
 744         }
 745         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 746                 return NULL;
 747
 748         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 749         {
 750                 Con_Print("LoadWAL: invalid WAL file\n");
 751                 return NULL;
 752         }
 753
 754         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 755         if (!image_rgba)
 756         {
 757                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 758                 return NULL;
 759         }
 760         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 761         return image_rgba;
 762 }
 763
 764
 765 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
 766 {
 767         const char *ext;
 768
 769         if (size_out == 0)
 770                 return;
 771
 772         ext = FS_FileExtension(in);
 773         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
 774                 FS_StripExtension(in, out, size_out);
 775         else
 776                 strlcpy(out, in, size_out);
 777 }
 778
 779 typedef struct imageformat_s
 780 {
 781         const char *formatstring;
 782         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int matchwidth, int matchheight);
 783 }
 784 imageformat_t;
 785
 786 // GAME_TENEBRAE only
 787 imageformat_t imageformats_tenebrae[] =
 788 {
 789         {"override/%s.tga", LoadTGA},
 790         {"override/%s.png", PNG_LoadImage},
 791         {"override/%s.jpg", JPEG_LoadImage},
 792         {"override/%s.pcx", LoadPCX},
 793         {NULL, NULL}
 794 };
 795
 796 imageformat_t imageformats_nopath[] =
 797 {
 798         {"override/%s.tga", LoadTGA},
 799         {"override/%s.png", PNG_LoadImage},
 800         {"override/%s.jpg", JPEG_LoadImage},
 801         {"textures/%s.tga", LoadTGA},
 802         {"textures/%s.png", PNG_LoadImage},
 803         {"textures/%s.jpg", JPEG_LoadImage},
 804         {"%s.tga", LoadTGA},
 805         {"%s.png", PNG_LoadImage},
 806         {"%s.jpg", JPEG_LoadImage},
 807         {"%s.pcx", LoadPCX},
 808         {NULL, NULL}
 809 };
 810
 811 imageformat_t imageformats_textures[] =
 812 {
 813         {"%s.tga", LoadTGA},
 814         {"%s.png", PNG_LoadImage},
 815         {"%s.jpg", JPEG_LoadImage},
 816         {"%s.pcx", LoadPCX},
 817         {"%s.wal", LoadWAL},
 818         {NULL, NULL}
 819 };
 820
 821 imageformat_t imageformats_gfx[] =
 822 {
 823         {"%s.tga", LoadTGA},
 824         {"%s.png", PNG_LoadImage},
 825         {"%s.jpg", JPEG_LoadImage},
 826         {"%s.pcx", LoadPCX},
 827         {NULL, NULL}
 828 };
 829
 830 imageformat_t imageformats_other[] =
 831 {
 832         {"%s.tga", LoadTGA},
 833         {"%s.png", PNG_LoadImage},
 834         {"%s.jpg", JPEG_LoadImage},
 835         {"%s.pcx", LoadPCX},
 836         {NULL, NULL}
 837 };
 838
 839 unsigned char *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 840 {
 841         fs_offset_t filesize;
 842         imageformat_t *firstformat, *format;
 843         unsigned char *f, *data = NULL;
 844         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 845         if (developer_memorydebug.integer)
 846                 Mem_CheckSentinelsGlobal();
 847         if (developer_texturelogging.integer)
 848                 Log_Printf("textures.log", "%s\n", filename);
 849         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
 850         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 851         for (c = basename;*c;c++)
 852                 if (*c == '*')
 853                         *c = '#';
 854         name[0] = 0;
 855         if (strchr(basename, '/'))
 856         {
 857                 int i;
 858                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
 859                         name[i] = basename[i];
 860                 name[i] = 0;
 861         }
 862         if (gamemode == GAME_TENEBRAE)
 863                 firstformat = imageformats_tenebrae;
 864         else if (!strcasecmp(name, "textures"))
 865                 firstformat = imageformats_textures;
 866         else if (!strcasecmp(name, "gfx"))
 867                 firstformat = imageformats_gfx;
 868         else if (!strchr(basename, '/'))
 869                 firstformat = imageformats_nopath;
 870         else
 871                 firstformat = imageformats_other;
 872         // now try all the formats in the selected list
 873         for (format = firstformat;format->formatstring;format++)
 874         {
 875                 sprintf (name, format->formatstring, basename);
 876                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 877                 if (f)
 878                 {
 879                         data = format->loadfunc(f, filesize, matchwidth, matchheight);
 880                         Mem_Free(f);
 881                         if (data)
 882                         {
 883                                 if (developer.integer >= 10)
 884                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 885                                 if (developer_memorydebug.integer)
 886                                         Mem_CheckSentinelsGlobal();
 887                                 return data;
 888                         }
 889                         else
 890                         {
 891                                 if (developer.integer >= 1)
 892                                         Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
 893                         }
 894                 }
 895         }
 896         if (complain)
 897         {
 898                 Con_Printf("Couldn't load %s using ", filename);
 899                 for (format = firstformat;format->formatstring;format++)
 900                 {
 901                         sprintf (name, format->formatstring, basename);
 902                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
 903                 }
 904         }
 905         if (developer_memorydebug.integer)
 906                 Mem_CheckSentinelsGlobal();
 907         return NULL;
 908 }
 909
 910 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 911 {
 912         unsigned char *data;
 913         rtexture_t *rt;
 914         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 915                 return 0;
 916         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 917         Mem_Free(data);
 918         return rt;
 919 }
 920
 921 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
 922 {
 923         qboolean ret;
 924         unsigned char *out;
 925         const unsigned char *in, *end;
 926
 927         memset (buffer, 0, 18);
 928         buffer[2] = 2;          // uncompressed type
 929         buffer[12] = (width >> 0) & 0xFF;
 930         buffer[13] = (width >> 8) & 0xFF;
 931         buffer[14] = (height >> 0) & 0xFF;
 932         buffer[15] = (height >> 8) & 0xFF;
 933         buffer[16] = 24;        // pixel size
 934
 935         // swap rgb to bgr
 936         in = data;
 937         out = buffer + 18;
 938         end = in + width*height*3;
 939         for (;in < end;in += 3)
 940         {
 941                 *out++ = in[2];
 942                 *out++ = in[1];
 943                 *out++ = in[0];
 944         }
 945         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 946
 947         return ret;
 948 }
 949
 950 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
 951 {
 952         int y;
 953         unsigned char *buffer, *out;
 954         const unsigned char *in, *end;
 955
 956         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
 957
 958         memset (buffer, 0, 18);
 959         buffer[2] = 2;          // uncompressed type
 960         buffer[12] = (width >> 0) & 0xFF;
 961         buffer[13] = (width >> 8) & 0xFF;
 962         buffer[14] = (height >> 0) & 0xFF;
 963         buffer[15] = (height >> 8) & 0xFF;
 964         buffer[16] = 32;        // pixel size
 965         buffer[17] = 8; // 8 bits of alpha
 966
 967         // swap rgba to bgra and flip upside down
 968         out = buffer + 18;
 969         for (y = height - 1;y >= 0;y--)
 970         {
 971                 in = data + y * width * 4;
 972                 end = in + width * 4;
 973                 for (;in < end;in += 4)
 974                 {
 975                         *out++ = in[2];
 976                         *out++ = in[1];
 977                         *out++ = in[0];
 978                         *out++ = in[3];
 979                 }
 980         }
 981         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 982
 983         Mem_Free(buffer);
 984 }
 985
 986 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 987 {
 988         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 989         fstep = (int) (inwidth*65536.0f/outwidth);
 990         endx = (inwidth-1);
 991         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 992         {
 993                 xi = f >> 16;
 994                 if (xi != oldx)
 995                 {
 996                         in += (xi - oldx) * 4;
 997                         oldx = xi;
 998                 }
 999                 if (xi < endx)
1000                 {
1001                         lerp = f & 0xFFFF;
1002                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1003                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1004                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1005                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1006                 }
1007                 else // last pixel of the line has no pixel to lerp to
1008                 {
1009                         *out++ = in[0];
1010                         *out++ = in[1];
1011                         *out++ = in[2];
1012                         *out++ = in[3];
1013                 }
1014         }
1015 }
1016
1017 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1018 {
1019         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1020         fstep = (int) (inwidth*65536.0f/outwidth);
1021         endx = (inwidth-1);
1022         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1023         {
1024                 xi = f >> 16;
1025                 if (xi != oldx)
1026                 {
1027                         in += (xi - oldx) * 3;
1028                         oldx = xi;
1029                 }
1030                 if (xi < endx)
1031                 {
1032                         lerp = f & 0xFFFF;
1033                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1034                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1035                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1036                 }
1037                 else // last pixel of the line has no pixel to lerp to
1038                 {
1039                         *out++ = in[0];
1040                         *out++ = in[1];
1041                         *out++ = in[2];
1042                 }
1043         }
1044 }
1045
1046 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1047 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1048 {
1049         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1050         unsigned char *out;
1051         const unsigned char *inrow;
1052         unsigned char *resamplerow1;
1053         unsigned char *resamplerow2;
1054         out = (unsigned char *)outdata;
1055         fstep = (int) (inheight*65536.0f/outheight);
1056
1057         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1058         resamplerow2 = resamplerow1 + outwidth*4;
1059
1060         inrow = (const unsigned char *)indata;
1061         oldy = 0;
1062         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1063         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1064         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1065         {
1066                 yi = f >> 16;
1067                 if (yi < endy)
1068                 {
1069                         lerp = f & 0xFFFF;
1070                         if (yi != oldy)
1071                         {
1072                                 inrow = (unsigned char *)indata + inwidth4*yi;
1073                                 if (yi == oldy+1)
1074                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1075                                 else
1076                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1077                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1078                                 oldy = yi;
1079                         }
1080                         j = outwidth - 4;
1081                         while(j >= 0)
1082                         {
1083                                 LERPBYTE( 0);
1084                                 LERPBYTE( 1);
1085                                 LERPBYTE( 2);
1086                                 LERPBYTE( 3);
1087                                 LERPBYTE( 4);
1088                                 LERPBYTE( 5);
1089                                 LERPBYTE( 6);
1090                                 LERPBYTE( 7);
1091                                 LERPBYTE( 8);
1092                                 LERPBYTE( 9);
1093                                 LERPBYTE(10);
1094                                 LERPBYTE(11);
1095                                 LERPBYTE(12);
1096                                 LERPBYTE(13);
1097                                 LERPBYTE(14);
1098                                 LERPBYTE(15);
1099                                 out += 16;
1100                                 resamplerow1 += 16;
1101                                 resamplerow2 += 16;
1102                                 j -= 4;
1103                         }
1104                         if (j & 2)
1105                         {
1106                                 LERPBYTE( 0);
1107                                 LERPBYTE( 1);
1108                                 LERPBYTE( 2);
1109                                 LERPBYTE( 3);
1110                                 LERPBYTE( 4);
1111                                 LERPBYTE( 5);
1112                                 LERPBYTE( 6);
1113                                 LERPBYTE( 7);
1114                                 out += 8;
1115                                 resamplerow1 += 8;
1116                                 resamplerow2 += 8;
1117                         }
1118                         if (j & 1)
1119                         {
1120                                 LERPBYTE( 0);
1121                                 LERPBYTE( 1);
1122                                 LERPBYTE( 2);
1123                                 LERPBYTE( 3);
1124                                 out += 4;
1125                                 resamplerow1 += 4;
1126                                 resamplerow2 += 4;
1127                         }
1128                         resamplerow1 -= outwidth4;
1129                         resamplerow2 -= outwidth4;
1130                 }
1131                 else
1132                 {
1133                         if (yi != oldy)
1134                         {
1135                                 inrow = (unsigned char *)indata + inwidth4*yi;
1136                                 if (yi == oldy+1)
1137                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1138                                 else
1139                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1140                                 oldy = yi;
1141                         }
1142                         memcpy(out, resamplerow1, outwidth4);
1143                 }
1144         }
1145
1146         Mem_Free(resamplerow1);
1147         resamplerow1 = NULL;
1148         resamplerow2 = NULL;
1149 }
1150
1151 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1152 {
1153         int i, j;
1154         unsigned frac, fracstep;
1155         // relies on int being 4 bytes
1156         int *inrow, *out;
1157         out = (int *)outdata;
1158
1159         fracstep = inwidth*0x10000/outwidth;
1160         for (i = 0;i < outheight;i++)
1161         {
1162                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1163                 frac = fracstep >> 1;
1164                 j = outwidth - 4;
1165                 while (j >= 0)
1166                 {
1167                         out[0] = inrow[frac >> 16];frac += fracstep;
1168                         out[1] = inrow[frac >> 16];frac += fracstep;
1169                         out[2] = inrow[frac >> 16];frac += fracstep;
1170                         out[3] = inrow[frac >> 16];frac += fracstep;
1171                         out += 4;
1172                         j -= 4;
1173                 }
1174                 if (j & 2)
1175                 {
1176                         out[0] = inrow[frac >> 16];frac += fracstep;
1177                         out[1] = inrow[frac >> 16];frac += fracstep;
1178                         out += 2;
1179                 }
1180                 if (j & 1)
1181                 {
1182                         out[0] = inrow[frac >> 16];frac += fracstep;
1183                         out += 1;
1184                 }
1185         }
1186 }
1187
1188 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1189 {
1190         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1191         unsigned char *out;
1192         const unsigned char *inrow;
1193         unsigned char *resamplerow1;
1194         unsigned char *resamplerow2;
1195         out = (unsigned char *)outdata;
1196         fstep = (int) (inheight*65536.0f/outheight);
1197
1198         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1199         resamplerow2 = resamplerow1 + outwidth*3;
1200
1201         inrow = (const unsigned char *)indata;
1202         oldy = 0;
1203         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1204         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1205         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1206         {
1207                 yi = f >> 16;
1208                 if (yi < endy)
1209                 {
1210                         lerp = f & 0xFFFF;
1211                         if (yi != oldy)
1212                         {
1213                                 inrow = (unsigned char *)indata + inwidth3*yi;
1214                                 if (yi == oldy+1)
1215                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1216                                 else
1217                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1218                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1219                                 oldy = yi;
1220                         }
1221                         j = outwidth - 4;
1222                         while(j >= 0)
1223                         {
1224                                 LERPBYTE( 0);
1225                                 LERPBYTE( 1);
1226                                 LERPBYTE( 2);
1227                                 LERPBYTE( 3);
1228                                 LERPBYTE( 4);
1229                                 LERPBYTE( 5);
1230                                 LERPBYTE( 6);
1231                                 LERPBYTE( 7);
1232                                 LERPBYTE( 8);
1233                                 LERPBYTE( 9);
1234                                 LERPBYTE(10);
1235                                 LERPBYTE(11);
1236                                 out += 12;
1237                                 resamplerow1 += 12;
1238                                 resamplerow2 += 12;
1239                                 j -= 4;
1240                         }
1241                         if (j & 2)
1242                         {
1243                                 LERPBYTE( 0);
1244                                 LERPBYTE( 1);
1245                                 LERPBYTE( 2);
1246                                 LERPBYTE( 3);
1247                                 LERPBYTE( 4);
1248                                 LERPBYTE( 5);
1249                                 out += 6;
1250                                 resamplerow1 += 6;
1251                                 resamplerow2 += 6;
1252                         }
1253                         if (j & 1)
1254                         {
1255                                 LERPBYTE( 0);
1256                                 LERPBYTE( 1);
1257                                 LERPBYTE( 2);
1258                                 out += 3;
1259                                 resamplerow1 += 3;
1260                                 resamplerow2 += 3;
1261                         }
1262                         resamplerow1 -= outwidth3;
1263                         resamplerow2 -= outwidth3;
1264                 }
1265                 else
1266                 {
1267                         if (yi != oldy)
1268                         {
1269                                 inrow = (unsigned char *)indata + inwidth3*yi;
1270                                 if (yi == oldy+1)
1271                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1272                                 else
1273                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1274                                 oldy = yi;
1275                         }
1276                         memcpy(out, resamplerow1, outwidth3);
1277                 }
1278         }
1279         Mem_Free(resamplerow1);
1280         resamplerow1 = NULL;
1281         resamplerow2 = NULL;
1282 }
1283
1284 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1285 {
1286         int i, j, f, inwidth3 = inwidth * 3;
1287         unsigned frac, fracstep;
1288         unsigned char *inrow, *out;
1289         out = (unsigned char *)outdata;
1290
1291         fracstep = inwidth*0x10000/outwidth;
1292         for (i = 0;i < outheight;i++)
1293         {
1294                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1295                 frac = fracstep >> 1;
1296                 j = outwidth - 4;
1297                 while (j >= 0)
1298                 {
1299                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1300                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1301                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1302                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1303                         j -= 4;
1304                 }
1305                 if (j & 2)
1306                 {
1307                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1308                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1309                         out += 2;
1310                 }
1311                 if (j & 1)
1312                 {
1313                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1314                         out += 1;
1315                 }
1316         }
1317 }
1318
1319 /*
1320 ================
1321 Image_Resample
1322 ================
1323 */
1324 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1325 {
1326         if (indepth != 1 || outdepth != 1)
1327         {
1328                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1329                 return;
1330         }
1331         if (bytesperpixel == 4)
1332         {
1333                 if (quality)
1334                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1335                 else
1336                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1337         }
1338         else if (bytesperpixel == 3)
1339         {
1340                 if (quality)
1341                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1342                 else
1343                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1344         }
1345         else
1346                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1347 }
1348
1349 // in can be the same as out
1350 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1351 {
1352         const unsigned char *inrow;
1353         int x, y, nextrow;
1354         if (*depth != 1 || destdepth != 1)
1355         {
1356                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1357                 if (*width > destwidth)
1358                         *width >>= 1;
1359                 if (*height > destheight)
1360                         *height >>= 1;
1361                 if (*depth > destdepth)
1362                         *depth >>= 1;
1363                 return;
1364         }
1365         // note: if given odd width/height this discards the last row/column of
1366         // pixels, rather than doing a proper box-filter scale down
1367         inrow = in;
1368         nextrow = *width * bytesperpixel;
1369         if (*width > destwidth)
1370         {
1371                 *width >>= 1;
1372                 if (*height > destheight)
1373                 {
1374                         // reduce both
1375                         *height >>= 1;
1376                         if (bytesperpixel == 4)
1377                         {
1378                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1379                                 {
1380                                         for (in = inrow, x = 0;x < *width;x++)
1381                                         {
1382                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1383                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1384                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1385                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1386                                                 out += 4;
1387                                                 in += 8;
1388                                         }
1389                                 }
1390                         }
1391                         else if (bytesperpixel == 3)
1392                         {
1393                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1394                                 {
1395                                         for (in = inrow, x = 0;x < *width;x++)
1396                                         {
1397                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1398                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1399                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1400                                                 out += 3;
1401                                                 in += 6;
1402                                         }
1403                                 }
1404                         }
1405                         else
1406                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1407                 }
1408                 else
1409                 {
1410                         // reduce width
1411                         if (bytesperpixel == 4)
1412                         {
1413                                 for (y = 0;y < *height;y++, inrow += nextrow)
1414                                 {
1415                                         for (in = inrow, x = 0;x < *width;x++)
1416                                         {
1417                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1418                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1419                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1420                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1421                                                 out += 4;
1422                                                 in += 8;
1423                                         }
1424                                 }
1425                         }
1426                         else if (bytesperpixel == 3)
1427                         {
1428                                 for (y = 0;y < *height;y++, inrow += nextrow)
1429                                 {
1430                                         for (in = inrow, x = 0;x < *width;x++)
1431                                         {
1432                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1433                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1434                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1435                                                 out += 3;
1436                                                 in += 6;
1437                                         }
1438                                 }
1439                         }
1440                         else
1441                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1442                 }
1443         }
1444         else
1445         {
1446                 if (*height > destheight)
1447                 {
1448                         // reduce height
1449                         *height >>= 1;
1450                         if (bytesperpixel == 4)
1451                         {
1452                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1453                                 {
1454                                         for (in = inrow, x = 0;x < *width;x++)
1455                                         {
1456                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1457                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1458                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1459                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1460                                                 out += 4;
1461                                                 in += 4;
1462                                         }
1463                                 }
1464                         }
1465                         else if (bytesperpixel == 3)
1466                         {
1467                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1468                                 {
1469                                         for (in = inrow, x = 0;x < *width;x++)
1470                                         {
1471                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1472                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1473                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1474                                                 out += 3;
1475                                                 in += 3;
1476                                         }
1477                                 }
1478                         }
1479                         else
1480                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1481                 }
1482                 else
1483                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1484         }
1485 }
1486
1487 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1488 {
1489         int x, y, x1, x2, y1, y2;
1490         const unsigned char *b, *row[3];
1491         int p[5];
1492         unsigned char *out;
1493         float iwidth, iheight, ibumpscale, n[3];
1494         iwidth = 1.0f / width;
1495         iheight = 1.0f / height;
1496         ibumpscale = (255.0f * 6.0f) / bumpscale;
1497         out = outpixels;
1498         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1499         {
1500                 y2 = y + 1;if (y2 >= height) y2 = 0;
1501                 row[0] = inpixels + (y1 * width) * 4;
1502                 row[1] = inpixels + (y  * width) * 4;
1503                 row[2] = inpixels + (y2 * width) * 4;
1504                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1505                 {
1506                         x2 = x + 1;if (x2 >= width) x2 = 0;
1507                         // left, right
1508                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1509                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1510                         // above, below
1511                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1512                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1513                         // center
1514                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1515                         // calculate a normal from the slopes
1516                         n[0] = p[0] - p[1];
1517                         n[1] = p[3] - p[2];
1518                         n[2] = ibumpscale;
1519                         VectorNormalize(n);
1520                         // turn it into a dot3 rgb vector texture
1521                         out[0] = (int)(128.0f + n[0] * 127.0f);
1522                         out[1] = (int)(128.0f + n[1] * 127.0f);
1523                         out[2] = (int)(128.0f + n[2] * 127.0f);
1524                         out[3] = (p[4]) / 3;
1525                         out += 4;
1526                 }
1527         }
1528 }