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 static void Image_StripImageExtension (const char *in, char *out, size_t size_out)
 766 {
 767         const char *end, *temp;
 768
 769         if (size_out == 0)
 770                 return;
 771
 772         end = in + strlen(in);
 773         if ((end - in) >= 4)
 774         {
 775                 temp = end - 4;
 776                 if (strcmp(temp, ".tga") == 0
 777                  || strcmp(temp, ".pcx") == 0
 778                  || strcmp(temp, ".lmp") == 0
 779                  || strcmp(temp, ".png") == 0
 780                  || strcmp(temp, ".jpg") == 0)
 781                         end = temp;
 782                 while (in < end && size_out > 1)
 783                 {
 784                         *out++ = *in++;
 785                         size_out--;
 786                 }
 787                 *out++ = 0;
 788         }
 789         else
 790                 strlcpy(out, in, size_out);
 791 }
 792
 793 typedef struct imageformat_s
 794 {
 795         const char *formatstring;
 796         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int matchwidth, int matchheight);
 797 }
 798 imageformat_t;
 799
 800 // GAME_TENEBRAE only
 801 imageformat_t imageformats_tenebrae[] =
 802 {
 803         {"override/%s.tga", LoadTGA},
 804         {"override/%s.png", PNG_LoadImage},
 805         {"override/%s.jpg", JPEG_LoadImage},
 806         {"override/%s.pcx", LoadPCX},
 807         {NULL, NULL}
 808 };
 809
 810 imageformat_t imageformats_nopath[] =
 811 {
 812         {"override/%s.tga", LoadTGA},
 813         {"override/%s.png", PNG_LoadImage},
 814         {"override/%s.jpg", JPEG_LoadImage},
 815         {"textures/%s.tga", LoadTGA},
 816         {"textures/%s.png", PNG_LoadImage},
 817         {"textures/%s.jpg", JPEG_LoadImage},
 818         {"%s.tga", LoadTGA},
 819         {"%s.png", PNG_LoadImage},
 820         {"%s.jpg", JPEG_LoadImage},
 821         {"%s.pcx", LoadPCX},
 822         {NULL, NULL}
 823 };
 824
 825 imageformat_t imageformats_textures[] =
 826 {
 827         {"%s.tga", LoadTGA},
 828         {"%s.png", PNG_LoadImage},
 829         {"%s.jpg", JPEG_LoadImage},
 830         {"%s.pcx", LoadPCX},
 831         {"%s.wal", LoadWAL},
 832         {NULL, NULL}
 833 };
 834
 835 imageformat_t imageformats_gfx[] =
 836 {
 837         {"%s.tga", LoadTGA},
 838         {"%s.png", PNG_LoadImage},
 839         {"%s.jpg", JPEG_LoadImage},
 840         {"%s.pcx", LoadPCX},
 841         {NULL, NULL}
 842 };
 843
 844 imageformat_t imageformats_other[] =
 845 {
 846         {"%s.tga", LoadTGA},
 847         {"%s.png", PNG_LoadImage},
 848         {"%s.jpg", JPEG_LoadImage},
 849         {"%s.pcx", LoadPCX},
 850         {NULL, NULL}
 851 };
 852
 853 unsigned char *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 854 {
 855         fs_offset_t filesize;
 856         imageformat_t *firstformat, *format;
 857         unsigned char *f, *data = NULL;
 858         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 859         if (developer_memorydebug.integer)
 860                 Mem_CheckSentinelsGlobal();
 861         if (developer_texturelogging.integer)
 862                 Log_Printf("textures.log", "%s\n", filename);
 863         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
 864         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 865         for (c = basename;*c;c++)
 866                 if (*c == '*')
 867                         *c = '#';
 868         name[0] = 0;
 869         if (strchr(basename, '/'))
 870         {
 871                 int i;
 872                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
 873                         name[i] = basename[i];
 874                 name[i] = 0;
 875         }
 876         if (gamemode == GAME_TENEBRAE)
 877                 firstformat = imageformats_tenebrae;
 878         else if (!strcasecmp(name, "textures"))
 879                 firstformat = imageformats_textures;
 880         else if (!strcasecmp(name, "gfx"))
 881                 firstformat = imageformats_gfx;
 882         else if (!strchr(name, '/'))
 883                 firstformat = imageformats_nopath;
 884         else
 885                 firstformat = imageformats_other;
 886         // now try all the formats in the selected list
 887         for (format = firstformat;format->formatstring;format++)
 888         {
 889                 sprintf (name, format->formatstring, basename);
 890                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 891                 if (f)
 892                 {
 893                         data = format->loadfunc(f, filesize, matchwidth, matchheight);
 894                         Mem_Free(f);
 895                         if (data)
 896                         {
 897                                 if (developer.integer >= 10)
 898                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 899                                 if (developer_memorydebug.integer)
 900                                         Mem_CheckSentinelsGlobal();
 901                                 return data;
 902                         }
 903                         else
 904                         {
 905                                 if (developer.integer >= 1)
 906                                         Con_Printf("Error loading image %s (file loaded but decode failed)\n", name);
 907                         }
 908                 }
 909         }
 910         if (complain)
 911         {
 912                 Con_Printf("Couldn't load %s using ", filename);
 913                 for (format = firstformat;format->formatstring;format++)
 914                 {
 915                         sprintf (name, format->formatstring, basename);
 916                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
 917                 }
 918         }
 919         if (developer_memorydebug.integer)
 920                 Mem_CheckSentinelsGlobal();
 921         return NULL;
 922 }
 923
 924 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 925 {
 926         unsigned char *data;
 927         rtexture_t *rt;
 928         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 929                 return 0;
 930         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 931         Mem_Free(data);
 932         return rt;
 933 }
 934
 935 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
 936 {
 937         qboolean ret;
 938         unsigned char *out;
 939         const unsigned char *in, *end;
 940
 941         memset (buffer, 0, 18);
 942         buffer[2] = 2;          // uncompressed type
 943         buffer[12] = (width >> 0) & 0xFF;
 944         buffer[13] = (width >> 8) & 0xFF;
 945         buffer[14] = (height >> 0) & 0xFF;
 946         buffer[15] = (height >> 8) & 0xFF;
 947         buffer[16] = 24;        // pixel size
 948
 949         // swap rgb to bgr
 950         in = data;
 951         out = buffer + 18;
 952         end = in + width*height*3;
 953         for (;in < end;in += 3)
 954         {
 955                 *out++ = in[2];
 956                 *out++ = in[1];
 957                 *out++ = in[0];
 958         }
 959         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 960
 961         return ret;
 962 }
 963
 964 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
 965 {
 966         int y;
 967         unsigned char *buffer, *out;
 968         const unsigned char *in, *end;
 969
 970         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
 971
 972         memset (buffer, 0, 18);
 973         buffer[2] = 2;          // uncompressed type
 974         buffer[12] = (width >> 0) & 0xFF;
 975         buffer[13] = (width >> 8) & 0xFF;
 976         buffer[14] = (height >> 0) & 0xFF;
 977         buffer[15] = (height >> 8) & 0xFF;
 978         buffer[16] = 32;        // pixel size
 979         buffer[17] = 8; // 8 bits of alpha
 980
 981         // swap rgba to bgra and flip upside down
 982         out = buffer + 18;
 983         for (y = height - 1;y >= 0;y--)
 984         {
 985                 in = data + y * width * 4;
 986                 end = in + width * 4;
 987                 for (;in < end;in += 4)
 988                 {
 989                         *out++ = in[2];
 990                         *out++ = in[1];
 991                         *out++ = in[0];
 992                         *out++ = in[3];
 993                 }
 994         }
 995         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 996
 997         Mem_Free(buffer);
 998 }
 999
1000 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1001 {
1002         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1003         fstep = (int) (inwidth*65536.0f/outwidth);
1004         endx = (inwidth-1);
1005         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1006         {
1007                 xi = f >> 16;
1008                 if (xi != oldx)
1009                 {
1010                         in += (xi - oldx) * 4;
1011                         oldx = xi;
1012                 }
1013                 if (xi < endx)
1014                 {
1015                         lerp = f & 0xFFFF;
1016                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1017                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1018                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1019                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1020                 }
1021                 else // last pixel of the line has no pixel to lerp to
1022                 {
1023                         *out++ = in[0];
1024                         *out++ = in[1];
1025                         *out++ = in[2];
1026                         *out++ = in[3];
1027                 }
1028         }
1029 }
1030
1031 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1032 {
1033         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1034         fstep = (int) (inwidth*65536.0f/outwidth);
1035         endx = (inwidth-1);
1036         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1037         {
1038                 xi = f >> 16;
1039                 if (xi != oldx)
1040                 {
1041                         in += (xi - oldx) * 3;
1042                         oldx = xi;
1043                 }
1044                 if (xi < endx)
1045                 {
1046                         lerp = f & 0xFFFF;
1047                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1048                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1049                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1050                 }
1051                 else // last pixel of the line has no pixel to lerp to
1052                 {
1053                         *out++ = in[0];
1054                         *out++ = in[1];
1055                         *out++ = in[2];
1056                 }
1057         }
1058 }
1059
1060 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1061 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1062 {
1063         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1064         unsigned char *out;
1065         const unsigned char *inrow;
1066         unsigned char *resamplerow1;
1067         unsigned char *resamplerow2;
1068         out = (unsigned char *)outdata;
1069         fstep = (int) (inheight*65536.0f/outheight);
1070
1071         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1072         resamplerow2 = resamplerow1 + outwidth*4;
1073
1074         inrow = (const unsigned char *)indata;
1075         oldy = 0;
1076         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1077         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1078         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1079         {
1080                 yi = f >> 16;
1081                 if (yi < endy)
1082                 {
1083                         lerp = f & 0xFFFF;
1084                         if (yi != oldy)
1085                         {
1086                                 inrow = (unsigned char *)indata + inwidth4*yi;
1087                                 if (yi == oldy+1)
1088                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1089                                 else
1090                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1091                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1092                                 oldy = yi;
1093                         }
1094                         j = outwidth - 4;
1095                         while(j >= 0)
1096                         {
1097                                 LERPBYTE( 0);
1098                                 LERPBYTE( 1);
1099                                 LERPBYTE( 2);
1100                                 LERPBYTE( 3);
1101                                 LERPBYTE( 4);
1102                                 LERPBYTE( 5);
1103                                 LERPBYTE( 6);
1104                                 LERPBYTE( 7);
1105                                 LERPBYTE( 8);
1106                                 LERPBYTE( 9);
1107                                 LERPBYTE(10);
1108                                 LERPBYTE(11);
1109                                 LERPBYTE(12);
1110                                 LERPBYTE(13);
1111                                 LERPBYTE(14);
1112                                 LERPBYTE(15);
1113                                 out += 16;
1114                                 resamplerow1 += 16;
1115                                 resamplerow2 += 16;
1116                                 j -= 4;
1117                         }
1118                         if (j & 2)
1119                         {
1120                                 LERPBYTE( 0);
1121                                 LERPBYTE( 1);
1122                                 LERPBYTE( 2);
1123                                 LERPBYTE( 3);
1124                                 LERPBYTE( 4);
1125                                 LERPBYTE( 5);
1126                                 LERPBYTE( 6);
1127                                 LERPBYTE( 7);
1128                                 out += 8;
1129                                 resamplerow1 += 8;
1130                                 resamplerow2 += 8;
1131                         }
1132                         if (j & 1)
1133                         {
1134                                 LERPBYTE( 0);
1135                                 LERPBYTE( 1);
1136                                 LERPBYTE( 2);
1137                                 LERPBYTE( 3);
1138                                 out += 4;
1139                                 resamplerow1 += 4;
1140                                 resamplerow2 += 4;
1141                         }
1142                         resamplerow1 -= outwidth4;
1143                         resamplerow2 -= outwidth4;
1144                 }
1145                 else
1146                 {
1147                         if (yi != oldy)
1148                         {
1149                                 inrow = (unsigned char *)indata + inwidth4*yi;
1150                                 if (yi == oldy+1)
1151                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1152                                 else
1153                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1154                                 oldy = yi;
1155                         }
1156                         memcpy(out, resamplerow1, outwidth4);
1157                 }
1158         }
1159
1160         Mem_Free(resamplerow1);
1161         resamplerow1 = NULL;
1162         resamplerow2 = NULL;
1163 }
1164
1165 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1166 {
1167         int i, j;
1168         unsigned frac, fracstep;
1169         // relies on int being 4 bytes
1170         int *inrow, *out;
1171         out = (int *)outdata;
1172
1173         fracstep = inwidth*0x10000/outwidth;
1174         for (i = 0;i < outheight;i++)
1175         {
1176                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1177                 frac = fracstep >> 1;
1178                 j = outwidth - 4;
1179                 while (j >= 0)
1180                 {
1181                         out[0] = inrow[frac >> 16];frac += fracstep;
1182                         out[1] = inrow[frac >> 16];frac += fracstep;
1183                         out[2] = inrow[frac >> 16];frac += fracstep;
1184                         out[3] = inrow[frac >> 16];frac += fracstep;
1185                         out += 4;
1186                         j -= 4;
1187                 }
1188                 if (j & 2)
1189                 {
1190                         out[0] = inrow[frac >> 16];frac += fracstep;
1191                         out[1] = inrow[frac >> 16];frac += fracstep;
1192                         out += 2;
1193                 }
1194                 if (j & 1)
1195                 {
1196                         out[0] = inrow[frac >> 16];frac += fracstep;
1197                         out += 1;
1198                 }
1199         }
1200 }
1201
1202 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1203 {
1204         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1205         unsigned char *out;
1206         const unsigned char *inrow;
1207         unsigned char *resamplerow1;
1208         unsigned char *resamplerow2;
1209         out = (unsigned char *)outdata;
1210         fstep = (int) (inheight*65536.0f/outheight);
1211
1212         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1213         resamplerow2 = resamplerow1 + outwidth*3;
1214
1215         inrow = (const unsigned char *)indata;
1216         oldy = 0;
1217         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1218         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1219         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1220         {
1221                 yi = f >> 16;
1222                 if (yi < endy)
1223                 {
1224                         lerp = f & 0xFFFF;
1225                         if (yi != oldy)
1226                         {
1227                                 inrow = (unsigned char *)indata + inwidth3*yi;
1228                                 if (yi == oldy+1)
1229                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1230                                 else
1231                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1232                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1233                                 oldy = yi;
1234                         }
1235                         j = outwidth - 4;
1236                         while(j >= 0)
1237                         {
1238                                 LERPBYTE( 0);
1239                                 LERPBYTE( 1);
1240                                 LERPBYTE( 2);
1241                                 LERPBYTE( 3);
1242                                 LERPBYTE( 4);
1243                                 LERPBYTE( 5);
1244                                 LERPBYTE( 6);
1245                                 LERPBYTE( 7);
1246                                 LERPBYTE( 8);
1247                                 LERPBYTE( 9);
1248                                 LERPBYTE(10);
1249                                 LERPBYTE(11);
1250                                 out += 12;
1251                                 resamplerow1 += 12;
1252                                 resamplerow2 += 12;
1253                                 j -= 4;
1254                         }
1255                         if (j & 2)
1256                         {
1257                                 LERPBYTE( 0);
1258                                 LERPBYTE( 1);
1259                                 LERPBYTE( 2);
1260                                 LERPBYTE( 3);
1261                                 LERPBYTE( 4);
1262                                 LERPBYTE( 5);
1263                                 out += 6;
1264                                 resamplerow1 += 6;
1265                                 resamplerow2 += 6;
1266                         }
1267                         if (j & 1)
1268                         {
1269                                 LERPBYTE( 0);
1270                                 LERPBYTE( 1);
1271                                 LERPBYTE( 2);
1272                                 out += 3;
1273                                 resamplerow1 += 3;
1274                                 resamplerow2 += 3;
1275                         }
1276                         resamplerow1 -= outwidth3;
1277                         resamplerow2 -= outwidth3;
1278                 }
1279                 else
1280                 {
1281                         if (yi != oldy)
1282                         {
1283                                 inrow = (unsigned char *)indata + inwidth3*yi;
1284                                 if (yi == oldy+1)
1285                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1286                                 else
1287                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1288                                 oldy = yi;
1289                         }
1290                         memcpy(out, resamplerow1, outwidth3);
1291                 }
1292         }
1293         Mem_Free(resamplerow1);
1294         resamplerow1 = NULL;
1295         resamplerow2 = NULL;
1296 }
1297
1298 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1299 {
1300         int i, j, f, inwidth3 = inwidth * 3;
1301         unsigned frac, fracstep;
1302         unsigned char *inrow, *out;
1303         out = (unsigned char *)outdata;
1304
1305         fracstep = inwidth*0x10000/outwidth;
1306         for (i = 0;i < outheight;i++)
1307         {
1308                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1309                 frac = fracstep >> 1;
1310                 j = outwidth - 4;
1311                 while (j >= 0)
1312                 {
1313                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1314                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1315                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1316                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1317                         j -= 4;
1318                 }
1319                 if (j & 2)
1320                 {
1321                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1322                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1323                         out += 2;
1324                 }
1325                 if (j & 1)
1326                 {
1327                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1328                         out += 1;
1329                 }
1330         }
1331 }
1332
1333 /*
1334 ================
1335 Image_Resample
1336 ================
1337 */
1338 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1339 {
1340         if (indepth != 1 || outdepth != 1)
1341         {
1342                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1343                 return;
1344         }
1345         if (bytesperpixel == 4)
1346         {
1347                 if (quality)
1348                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1349                 else
1350                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1351         }
1352         else if (bytesperpixel == 3)
1353         {
1354                 if (quality)
1355                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1356                 else
1357                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1358         }
1359         else
1360                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1361 }
1362
1363 // in can be the same as out
1364 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1365 {
1366         const unsigned char *inrow;
1367         int x, y, nextrow;
1368         if (*depth != 1 || destdepth != 1)
1369         {
1370                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1371                 if (*width > destwidth)
1372                         *width >>= 1;
1373                 if (*height > destheight)
1374                         *height >>= 1;
1375                 if (*depth > destdepth)
1376                         *depth >>= 1;
1377                 return;
1378         }
1379         // note: if given odd width/height this discards the last row/column of
1380         // pixels, rather than doing a proper box-filter scale down
1381         inrow = in;
1382         nextrow = *width * bytesperpixel;
1383         if (*width > destwidth)
1384         {
1385                 *width >>= 1;
1386                 if (*height > destheight)
1387                 {
1388                         // reduce both
1389                         *height >>= 1;
1390                         if (bytesperpixel == 4)
1391                         {
1392                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1393                                 {
1394                                         for (in = inrow, x = 0;x < *width;x++)
1395                                         {
1396                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1397                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1398                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1399                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1400                                                 out += 4;
1401                                                 in += 8;
1402                                         }
1403                                 }
1404                         }
1405                         else if (bytesperpixel == 3)
1406                         {
1407                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1408                                 {
1409                                         for (in = inrow, x = 0;x < *width;x++)
1410                                         {
1411                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1412                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1413                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1414                                                 out += 3;
1415                                                 in += 6;
1416                                         }
1417                                 }
1418                         }
1419                         else
1420                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1421                 }
1422                 else
1423                 {
1424                         // reduce width
1425                         if (bytesperpixel == 4)
1426                         {
1427                                 for (y = 0;y < *height;y++, inrow += nextrow)
1428                                 {
1429                                         for (in = inrow, x = 0;x < *width;x++)
1430                                         {
1431                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1432                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1433                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1434                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1435                                                 out += 4;
1436                                                 in += 8;
1437                                         }
1438                                 }
1439                         }
1440                         else if (bytesperpixel == 3)
1441                         {
1442                                 for (y = 0;y < *height;y++, inrow += nextrow)
1443                                 {
1444                                         for (in = inrow, x = 0;x < *width;x++)
1445                                         {
1446                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1447                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1448                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1449                                                 out += 3;
1450                                                 in += 6;
1451                                         }
1452                                 }
1453                         }
1454                         else
1455                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1456                 }
1457         }
1458         else
1459         {
1460                 if (*height > destheight)
1461                 {
1462                         // reduce height
1463                         *height >>= 1;
1464                         if (bytesperpixel == 4)
1465                         {
1466                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1467                                 {
1468                                         for (in = inrow, x = 0;x < *width;x++)
1469                                         {
1470                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1471                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1472                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1473                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1474                                                 out += 4;
1475                                                 in += 4;
1476                                         }
1477                                 }
1478                         }
1479                         else if (bytesperpixel == 3)
1480                         {
1481                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1482                                 {
1483                                         for (in = inrow, x = 0;x < *width;x++)
1484                                         {
1485                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1486                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1487                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1488                                                 out += 3;
1489                                                 in += 3;
1490                                         }
1491                                 }
1492                         }
1493                         else
1494                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1495                 }
1496                 else
1497                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1498         }
1499 }
1500
1501 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1502 {
1503         int x, y, x1, x2, y1, y2;
1504         const unsigned char *b, *row[3];
1505         int p[5];
1506         unsigned char *out;
1507         float iwidth, iheight, ibumpscale, n[3];
1508         iwidth = 1.0f / width;
1509         iheight = 1.0f / height;
1510         ibumpscale = (255.0f * 6.0f) / bumpscale;
1511         out = outpixels;
1512         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1513         {
1514                 y2 = y + 1;if (y2 >= height) y2 = 0;
1515                 row[0] = inpixels + (y1 * width) * 4;
1516                 row[1] = inpixels + (y  * width) * 4;
1517                 row[2] = inpixels + (y2 * width) * 4;
1518                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1519                 {
1520                         x2 = x + 1;if (x2 >= width) x2 = 0;
1521                         // left, right
1522                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1523                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1524                         // above, below
1525                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1526                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1527                         // center
1528                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1529                         // calculate a normal from the slopes
1530                         n[0] = p[0] - p[1];
1531                         n[1] = p[3] - p[2];
1532                         n[2] = ibumpscale;
1533                         VectorNormalize(n);
1534                         // turn it into a dot3 rgb vector texture
1535                         out[0] = (int)(128.0f + n[0] * 127.0f);
1536                         out[1] = (int)(128.0f + n[1] * 127.0f);
1537                         out[2] = (int)(128.0f + n[2] * 127.0f);
1538                         out[3] = (p[4]) / 3;
1539                         out += 4;
1540                 }
1541         }
1542 }
1543
1544 int image_loadskin(imageskin_t *s, const char *shadername)
1545 {
1546         int j;
1547         unsigned char *bumppixels;
1548         int bumppixels_width, bumppixels_height;
1549         char name[MAX_QPATH];
1550         Image_StripImageExtension(shadername, name, sizeof(name));
1551         memset(s, 0, sizeof(*s));
1552         s->basepixels = loadimagepixels(name, false, 0, 0);
1553         if (s->basepixels == NULL)
1554                 return false;
1555         s->basepixels_width = image_width;
1556         s->basepixels_height = image_height;
1557
1558         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1559         for (j = 3;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1560                 if (s->basepixels[j] < 255)
1561                         break;
1562         if (j < s->basepixels_width * s->basepixels_height * 4)
1563         {
1564                 // has transparent pixels
1565                 s->maskpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1566                 s->maskpixels_width = s->basepixels_width;
1567                 s->maskpixels_height = s->basepixels_height;
1568                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1569                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1570                 {
1571                         s->maskpixels[j+0] = 255;
1572                         s->maskpixels[j+1] = 255;
1573                         s->maskpixels[j+2] = 255;
1574                 }
1575         }
1576
1577         // _luma is supported for tenebrae compatibility
1578         // (I think it's a very stupid name, but oh well)
1579         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1580          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1581         {
1582                 s->glowpixels_width = image_width;
1583                 s->glowpixels_height = image_height;
1584         }
1585         // _norm is the name used by tenebrae
1586         // (I don't like the name much)
1587         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1588         {
1589                 s->nmappixels_width = image_width;
1590                 s->nmappixels_height = image_height;
1591         }
1592         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1593         {
1594                 bumppixels_width = image_width;
1595                 bumppixels_height = image_height;
1596         }
1597         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1598         {
1599                 s->glosspixels_width = image_width;
1600                 s->glosspixels_height = image_height;
1601         }
1602         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1603         {
1604                 s->pantspixels_width = image_width;
1605                 s->pantspixels_height = image_height;
1606         }
1607         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1608         {
1609                 s->shirtpixels_width = image_width;
1610                 s->shirtpixels_height = image_height;
1611         }
1612
1613         if (s->nmappixels == NULL)
1614         {
1615                 if (bumppixels != NULL)
1616                 {
1617                         if (r_shadow_bumpscale_bumpmap.value > 0)
1618                         {
1619                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1620                                 s->nmappixels_width = bumppixels_width;
1621                                 s->nmappixels_height = bumppixels_height;
1622                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1623                         }
1624                 }
1625                 else
1626                 {
1627                         if (r_shadow_bumpscale_basetexture.value > 0)
1628                         {
1629                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1630                                 s->nmappixels_width = s->basepixels_width;
1631                                 s->nmappixels_height = s->basepixels_height;
1632                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1633                         }
1634                 }
1635         }
1636         if (bumppixels != NULL)
1637                 Mem_Free(bumppixels);
1638         return true;
1639 }
1640
1641 void image_freeskin(imageskin_t *s)
1642 {
1643         if (s->basepixels)
1644                 Mem_Free(s->basepixels);
1645         if (s->maskpixels)
1646                 Mem_Free(s->maskpixels);
1647         if (s->nmappixels)
1648                 Mem_Free(s->nmappixels);
1649         if (s->glowpixels)
1650                 Mem_Free(s->glowpixels);
1651         if (s->glosspixels)
1652                 Mem_Free(s->glosspixels);
1653         if (s->pantspixels)
1654                 Mem_Free(s->pantspixels);
1655         if (s->shirtpixels)
1656                 Mem_Free(s->shirtpixels);
1657         memset(s, 0, sizeof(*s));
1658 }
1659