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, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex, 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         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 390         {
 391                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 392                 {
 393                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 394                         PrintTargaHeader(&targa_header);
 395                         return NULL;
 396                 }
 397         }
 398         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 399         {
 400                 if (targa_header.pixel_size != 8)
 401                 {
 402                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 403                         PrintTargaHeader(&targa_header);
 404                         return NULL;
 405                 }
 406         }
 407         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
 408         {
 409                 if (targa_header.pixel_size != 8)
 410                 {
 411                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 412                         PrintTargaHeader(&targa_header);
 413                         return NULL;
 414                 }
 415         }
 416         else
 417         {
 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         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 457         x = 0;
 458         y = 0;
 459         red = green = blue = alpha = 255;
 460         while (y < image_height)
 461         {
 462                 // decoder is mostly the same whether it's compressed or not
 463                 readpixelcount = 1000000;
 464                 runlen = 1000000;
 465                 if (compressed && fin < enddata)
 466                 {
 467                         runlen = *fin++;
 468                         // high bit indicates this is an RLE compressed run
 469                         if (runlen & 0x80)
 470                                 readpixelcount = 1;
 471                         runlen = 1 + (runlen & 0x7f);
 472                 }
 473
 474                 while((runlen--) && y < image_height)
 475                 {
 476                         if (readpixelcount > 0)
 477                         {
 478                                 readpixelcount--;
 479                                 red = green = blue = alpha = 255;
 480                                 if (fin < enddata)
 481                                 {
 482                                         switch(targa_header.image_type)
 483                                         {
 484                                         case 1:
 485                                         case 9:
 486                                                 // colormapped
 487                                                 pindex = *fin++;
 488                                                 if (pindex >= targa_header.colormap_length)
 489                                                         pindex = 0; // error
 490                                                 p = palette + pindex * 4;
 491                                                 red = p[0];
 492                                                 green = p[1];
 493                                                 blue = p[2];
 494                                                 alpha = p[3];
 495                                                 break;
 496                                         case 2:
 497                                         case 10:
 498                                                 // BGR or BGRA
 499                                                 blue = *fin++;
 500                                                 if (fin < enddata)
 501                                                         green = *fin++;
 502                                                 if (fin < enddata)
 503                                                         red = *fin++;
 504                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 505                                                         alpha = *fin++;
 506                                                 break;
 507                                         case 3:
 508                                         case 11:
 509                                                 // greyscale
 510                                                 red = green = blue = *fin++;
 511                                                 break;
 512                                         }
 513                                         if (!alphabits)
 514                                                 alpha = 255;
 515                                 }
 516                         }
 517                         *pixbuf++ = red;
 518                         *pixbuf++ = green;
 519                         *pixbuf++ = blue;
 520                         *pixbuf++ = alpha;
 521                         x++;
 522                         if (x == image_width)
 523                         {
 524                                 // end of line, advance to next
 525                                 x = 0;
 526                                 y++;
 527                                 pixbuf += row_inc;
 528                         }
 529                 }
 530         }
 531
 532         return image_rgba;
 533 }
 534
 535 /*
 536 ============
 537 LoadLMP
 538 ============
 539 */
 540 unsigned char *LoadLMP (const unsigned char *f, int filesize, int matchwidth, int matchheight, qboolean loadAs8Bit)
 541 {
 542         unsigned char *image_buffer;
 543
 544         if (filesize < 9)
 545         {
 546                 Con_Print("LoadLMP: invalid LMP file\n");
 547                 return NULL;
 548         }
 549
 550         // parse the very complicated header *chuckle*
 551         image_width = BuffLittleLong(f);
 552         image_height = BuffLittleLong(f + 4);
 553         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 554         {
 555                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 556                 return NULL;
 557         }
 558         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 559                 return NULL;
 560
 561         if (filesize < (8 + image_width * image_height))
 562         {
 563                 Con_Print("LoadLMP: invalid LMP file\n");
 564                 return NULL;
 565         }
 566
 567         if (loadAs8Bit)
 568         {
 569                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height);
 570                 memcpy(image_buffer, f + 8, image_width * image_height);
 571         }
 572         else
 573         {
 574                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 575                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_transparent);
 576         }
 577         return image_buffer;
 578 }
 579
 580 static unsigned char *LoadLMPRGBA (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 581 {
 582         return LoadLMP(f, filesize, matchwidth, matchheight, false);
 583 }
 584
 585
 586 typedef struct q2wal_s
 587 {
 588         char            name[32];
 589         unsigned        width, height;
 590         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 591         char            animname[32];                   // next frame in animation chain
 592         int                     flags;
 593         int                     contents;
 594         int                     value;
 595 } q2wal_t;
 596
 597 unsigned char *LoadWAL (const unsigned char *f, int filesize, int matchwidth, int matchheight)
 598 {
 599         unsigned char *image_rgba;
 600         const q2wal_t *inwal = (const q2wal_t *)f;
 601
 602         if (filesize < (int) sizeof(q2wal_t))
 603         {
 604                 Con_Print("LoadWAL: invalid WAL file\n");
 605                 return NULL;
 606         }
 607
 608         image_width = LittleLong(inwal->width);
 609         image_height = LittleLong(inwal->height);
 610         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 611         {
 612                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 613                 return NULL;
 614         }
 615         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 616                 return NULL;
 617
 618         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 619         {
 620                 Con_Print("LoadWAL: invalid WAL file\n");
 621                 return NULL;
 622         }
 623
 624         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 625         if (!image_rgba)
 626         {
 627                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 628                 return NULL;
 629         }
 630         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 631         return image_rgba;
 632 }
 633
 634
 635 void Image_StripImageExtension (const char *in, char *out)
 636 {
 637         const char *end, *temp;
 638         end = in + strlen(in);
 639         if ((end - in) >= 4)
 640         {
 641                 temp = end - 4;
 642                 if (strcmp(temp, ".tga") == 0
 643                  || strcmp(temp, ".pcx") == 0
 644                  || strcmp(temp, ".lmp") == 0
 645                  || strcmp(temp, ".png") == 0
 646                  || strcmp(temp, ".jpg") == 0)
 647                         end = temp;
 648                 while (in < end)
 649                         *out++ = *in++;
 650                 *out++ = 0;
 651         }
 652         else
 653                 strcpy(out, in);
 654 }
 655
 656 typedef struct imageformat_s
 657 {
 658         const char *formatstring;
 659         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int matchwidth, int matchheight);
 660 }
 661 imageformat_t;
 662
 663 // GAME_TENEBRAE only
 664 imageformat_t imageformats_tenebrae[] =
 665 {
 666         {"override/%s.tga", LoadTGA},
 667         {"override/%s.png", PNG_LoadImage},
 668         {"override/%s.jpg", JPEG_LoadImage},
 669         {NULL, NULL}
 670 };
 671
 672 imageformat_t imageformats_nopath[] =
 673 {
 674         {"textures/%s.tga", LoadTGA},
 675         {"textures/%s.png", PNG_LoadImage},
 676         {"textures/%s.jpg", JPEG_LoadImage},
 677         {"%s.tga", LoadTGA},
 678         {"%s.png", PNG_LoadImage},
 679         {"%s.jpg", JPEG_LoadImage},
 680         {NULL, NULL}
 681 };
 682
 683 imageformat_t imageformats_textures[] =
 684 {
 685         {"%s.tga", LoadTGA},
 686         {"%s.png", PNG_LoadImage},
 687         {"%s.jpg", JPEG_LoadImage},
 688         {"%s.pcx", LoadPCX},
 689         {"%s.wal", LoadWAL},
 690         {NULL, NULL}
 691 };
 692
 693 imageformat_t imageformats_gfx[] =
 694 {
 695         {"%s.tga", LoadTGA},
 696         {"%s.png", PNG_LoadImage},
 697         {"%s.jpg", JPEG_LoadImage},
 698         {"%s.pcx", LoadPCX},
 699         {"%s.lmp", LoadLMPRGBA},
 700         {NULL, NULL}
 701 };
 702
 703 imageformat_t imageformats_other[] =
 704 {
 705         {"%s.tga", LoadTGA},
 706         {"%s.png", PNG_LoadImage},
 707         {"%s.jpg", JPEG_LoadImage},
 708         {"%s.pcx", LoadPCX},
 709         {NULL, NULL}
 710 };
 711
 712 unsigned char *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 713 {
 714         fs_offset_t filesize;
 715         imageformat_t *firstformat, *format;
 716         unsigned char *f, *data = NULL;
 717         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 718         if (developer_memorydebug.integer)
 719                 Mem_CheckSentinelsGlobal();
 720         if (developer_texturelogging.integer)
 721                 Log_Printf("textures.log", "%s\n", filename);
 722         strlcpy(basename, filename, sizeof(basename));
 723         Image_StripImageExtension(basename, basename); // strip filename extensions to allow replacement by other types
 724         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 725         for (c = basename;*c;c++)
 726                 if (*c == '*')
 727                         *c = '#';
 728         name[0] = 0;
 729         if (strchr(basename, '/'))
 730         {
 731                 int i;
 732                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
 733                         name[i] = basename[i];
 734                 name[i] = 0;
 735         }
 736         if (gamemode == GAME_TENEBRAE)
 737                 firstformat = imageformats_tenebrae;
 738         else if (!strcasecmp(name, "textures"))
 739                 firstformat = imageformats_textures;
 740         else if (!strcasecmp(name, "gfx"))
 741                 firstformat = imageformats_gfx;
 742         else if (!strchr(name, '/'))
 743                 firstformat = imageformats_nopath;
 744         else
 745                 firstformat = imageformats_other;
 746         // now try all the formats in the selected list
 747         for (format = firstformat;format->formatstring;format++)
 748         {
 749                 sprintf (name, format->formatstring, basename);
 750                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 751                 if (f)
 752                 {
 753                         data = format->loadfunc(f, filesize, matchwidth, matchheight);
 754                         Mem_Free(f);
 755                         if (data)
 756                         {
 757                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 758                                 if (developer_memorydebug.integer)
 759                                         Mem_CheckSentinelsGlobal();
 760                                 return data;
 761                         }
 762                 }
 763         }
 764         if (complain)
 765         {
 766                 Con_Printf("Couldn't load %s using ", filename);
 767                 for (format = firstformat;format->formatstring;format++)
 768                 {
 769                         sprintf (name, format->formatstring, basename);
 770                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
 771                 }
 772         }
 773         if (developer_memorydebug.integer)
 774                 Mem_CheckSentinelsGlobal();
 775         return NULL;
 776 }
 777
 778 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 779 {
 780         unsigned char *data;
 781         rtexture_t *rt;
 782         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 783                 return 0;
 784         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 785         Mem_Free(data);
 786         return rt;
 787 }
 788
 789 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
 790 {
 791         qboolean ret;
 792         unsigned char *out;
 793         const unsigned char *in, *end;
 794
 795         memset (buffer, 0, 18);
 796         buffer[2] = 2;          // uncompressed type
 797         buffer[12] = (width >> 0) & 0xFF;
 798         buffer[13] = (width >> 8) & 0xFF;
 799         buffer[14] = (height >> 0) & 0xFF;
 800         buffer[15] = (height >> 8) & 0xFF;
 801         buffer[16] = 24;        // pixel size
 802
 803         // swap rgb to bgr
 804         in = data;
 805         out = buffer + 18;
 806         end = in + width*height*3;
 807         for (;in < end;in += 3)
 808         {
 809                 *out++ = in[2];
 810                 *out++ = in[1];
 811                 *out++ = in[0];
 812         }
 813         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 814
 815         return ret;
 816 }
 817
 818 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
 819 {
 820         int y;
 821         unsigned char *buffer, *out;
 822         const unsigned char *in, *end;
 823
 824         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
 825
 826         memset (buffer, 0, 18);
 827         buffer[2] = 2;          // uncompressed type
 828         buffer[12] = (width >> 0) & 0xFF;
 829         buffer[13] = (width >> 8) & 0xFF;
 830         buffer[14] = (height >> 0) & 0xFF;
 831         buffer[15] = (height >> 8) & 0xFF;
 832         buffer[16] = 32;        // pixel size
 833         buffer[17] = 8; // 8 bits of alpha
 834
 835         // swap rgba to bgra and flip upside down
 836         out = buffer + 18;
 837         for (y = height - 1;y >= 0;y--)
 838         {
 839                 in = data + y * width * 4;
 840                 end = in + width * 4;
 841                 for (;in < end;in += 4)
 842                 {
 843                         *out++ = in[2];
 844                         *out++ = in[1];
 845                         *out++ = in[0];
 846                         *out++ = in[3];
 847                 }
 848         }
 849         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 850
 851         Mem_Free(buffer);
 852 }
 853
 854 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 855 {
 856         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 857         fstep = (int) (inwidth*65536.0f/outwidth);
 858         endx = (inwidth-1);
 859         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 860         {
 861                 xi = f >> 16;
 862                 if (xi != oldx)
 863                 {
 864                         in += (xi - oldx) * 4;
 865                         oldx = xi;
 866                 }
 867                 if (xi < endx)
 868                 {
 869                         lerp = f & 0xFFFF;
 870                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 871                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 872                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 873                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 874                 }
 875                 else // last pixel of the line has no pixel to lerp to
 876                 {
 877                         *out++ = in[0];
 878                         *out++ = in[1];
 879                         *out++ = in[2];
 880                         *out++ = in[3];
 881                 }
 882         }
 883 }
 884
 885 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 886 {
 887         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 888         fstep = (int) (inwidth*65536.0f/outwidth);
 889         endx = (inwidth-1);
 890         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 891         {
 892                 xi = f >> 16;
 893                 if (xi != oldx)
 894                 {
 895                         in += (xi - oldx) * 3;
 896                         oldx = xi;
 897                 }
 898                 if (xi < endx)
 899                 {
 900                         lerp = f & 0xFFFF;
 901                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 902                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 903                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 904                 }
 905                 else // last pixel of the line has no pixel to lerp to
 906                 {
 907                         *out++ = in[0];
 908                         *out++ = in[1];
 909                         *out++ = in[2];
 910                 }
 911         }
 912 }
 913
 914 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
 915 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
 916 {
 917         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
 918         unsigned char *out;
 919         const unsigned char *inrow;
 920         unsigned char *resamplerow1;
 921         unsigned char *resamplerow2;
 922         out = (unsigned char *)outdata;
 923         fstep = (int) (inheight*65536.0f/outheight);
 924
 925         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
 926         resamplerow2 = resamplerow1 + outwidth*4;
 927
 928         inrow = (const unsigned char *)indata;
 929         oldy = 0;
 930         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 931         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 932         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 933         {
 934                 yi = f >> 16;
 935                 if (yi < endy)
 936                 {
 937                         lerp = f & 0xFFFF;
 938                         if (yi != oldy)
 939                         {
 940                                 inrow = (unsigned char *)indata + inwidth4*yi;
 941                                 if (yi == oldy+1)
 942                                         memcpy(resamplerow1, resamplerow2, outwidth4);
 943                                 else
 944                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 945                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 946                                 oldy = yi;
 947                         }
 948                         j = outwidth - 4;
 949                         while(j >= 0)
 950                         {
 951                                 LERPBYTE( 0);
 952                                 LERPBYTE( 1);
 953                                 LERPBYTE( 2);
 954                                 LERPBYTE( 3);
 955                                 LERPBYTE( 4);
 956                                 LERPBYTE( 5);
 957                                 LERPBYTE( 6);
 958                                 LERPBYTE( 7);
 959                                 LERPBYTE( 8);
 960                                 LERPBYTE( 9);
 961                                 LERPBYTE(10);
 962                                 LERPBYTE(11);
 963                                 LERPBYTE(12);
 964                                 LERPBYTE(13);
 965                                 LERPBYTE(14);
 966                                 LERPBYTE(15);
 967                                 out += 16;
 968                                 resamplerow1 += 16;
 969                                 resamplerow2 += 16;
 970                                 j -= 4;
 971                         }
 972                         if (j & 2)
 973                         {
 974                                 LERPBYTE( 0);
 975                                 LERPBYTE( 1);
 976                                 LERPBYTE( 2);
 977                                 LERPBYTE( 3);
 978                                 LERPBYTE( 4);
 979                                 LERPBYTE( 5);
 980                                 LERPBYTE( 6);
 981                                 LERPBYTE( 7);
 982                                 out += 8;
 983                                 resamplerow1 += 8;
 984                                 resamplerow2 += 8;
 985                         }
 986                         if (j & 1)
 987                         {
 988                                 LERPBYTE( 0);
 989                                 LERPBYTE( 1);
 990                                 LERPBYTE( 2);
 991                                 LERPBYTE( 3);
 992                                 out += 4;
 993                                 resamplerow1 += 4;
 994                                 resamplerow2 += 4;
 995                         }
 996                         resamplerow1 -= outwidth4;
 997                         resamplerow2 -= outwidth4;
 998                 }
 999                 else
1000                 {
1001                         if (yi != oldy)
1002                         {
1003                                 inrow = (unsigned char *)indata + inwidth4*yi;
1004                                 if (yi == oldy+1)
1005                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1006                                 else
1007                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1008                                 oldy = yi;
1009                         }
1010                         memcpy(out, resamplerow1, outwidth4);
1011                 }
1012         }
1013
1014         Mem_Free(resamplerow1);
1015         resamplerow1 = NULL;
1016         resamplerow2 = NULL;
1017 }
1018
1019 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1020 {
1021         int i, j;
1022         unsigned frac, fracstep;
1023         // relies on int being 4 bytes
1024         int *inrow, *out;
1025         out = (int *)outdata;
1026
1027         fracstep = inwidth*0x10000/outwidth;
1028         for (i = 0;i < outheight;i++)
1029         {
1030                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1031                 frac = fracstep >> 1;
1032                 j = outwidth - 4;
1033                 while (j >= 0)
1034                 {
1035                         out[0] = inrow[frac >> 16];frac += fracstep;
1036                         out[1] = inrow[frac >> 16];frac += fracstep;
1037                         out[2] = inrow[frac >> 16];frac += fracstep;
1038                         out[3] = inrow[frac >> 16];frac += fracstep;
1039                         out += 4;
1040                         j -= 4;
1041                 }
1042                 if (j & 2)
1043                 {
1044                         out[0] = inrow[frac >> 16];frac += fracstep;
1045                         out[1] = inrow[frac >> 16];frac += fracstep;
1046                         out += 2;
1047                 }
1048                 if (j & 1)
1049                 {
1050                         out[0] = inrow[frac >> 16];frac += fracstep;
1051                         out += 1;
1052                 }
1053         }
1054 }
1055
1056 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1057 {
1058         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1059         unsigned char *out;
1060         const unsigned char *inrow;
1061         unsigned char *resamplerow1;
1062         unsigned char *resamplerow2;
1063         out = (unsigned char *)outdata;
1064         fstep = (int) (inheight*65536.0f/outheight);
1065
1066         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1067         resamplerow2 = resamplerow1 + outwidth*3;
1068
1069         inrow = (const unsigned char *)indata;
1070         oldy = 0;
1071         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1072         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1073         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1074         {
1075                 yi = f >> 16;
1076                 if (yi < endy)
1077                 {
1078                         lerp = f & 0xFFFF;
1079                         if (yi != oldy)
1080                         {
1081                                 inrow = (unsigned char *)indata + inwidth3*yi;
1082                                 if (yi == oldy+1)
1083                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1084                                 else
1085                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1086                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1087                                 oldy = yi;
1088                         }
1089                         j = outwidth - 4;
1090                         while(j >= 0)
1091                         {
1092                                 LERPBYTE( 0);
1093                                 LERPBYTE( 1);
1094                                 LERPBYTE( 2);
1095                                 LERPBYTE( 3);
1096                                 LERPBYTE( 4);
1097                                 LERPBYTE( 5);
1098                                 LERPBYTE( 6);
1099                                 LERPBYTE( 7);
1100                                 LERPBYTE( 8);
1101                                 LERPBYTE( 9);
1102                                 LERPBYTE(10);
1103                                 LERPBYTE(11);
1104                                 out += 12;
1105                                 resamplerow1 += 12;
1106                                 resamplerow2 += 12;
1107                                 j -= 4;
1108                         }
1109                         if (j & 2)
1110                         {
1111                                 LERPBYTE( 0);
1112                                 LERPBYTE( 1);
1113                                 LERPBYTE( 2);
1114                                 LERPBYTE( 3);
1115                                 LERPBYTE( 4);
1116                                 LERPBYTE( 5);
1117                                 out += 6;
1118                                 resamplerow1 += 6;
1119                                 resamplerow2 += 6;
1120                         }
1121                         if (j & 1)
1122                         {
1123                                 LERPBYTE( 0);
1124                                 LERPBYTE( 1);
1125                                 LERPBYTE( 2);
1126                                 out += 3;
1127                                 resamplerow1 += 3;
1128                                 resamplerow2 += 3;
1129                         }
1130                         resamplerow1 -= outwidth3;
1131                         resamplerow2 -= outwidth3;
1132                 }
1133                 else
1134                 {
1135                         if (yi != oldy)
1136                         {
1137                                 inrow = (unsigned char *)indata + inwidth3*yi;
1138                                 if (yi == oldy+1)
1139                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1140                                 else
1141                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1142                                 oldy = yi;
1143                         }
1144                         memcpy(out, resamplerow1, outwidth3);
1145                 }
1146         }
1147         Mem_Free(resamplerow1);
1148         resamplerow1 = NULL;
1149         resamplerow2 = NULL;
1150 }
1151
1152 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1153 {
1154         int i, j, f, inwidth3 = inwidth * 3;
1155         unsigned frac, fracstep;
1156         unsigned char *inrow, *out;
1157         out = (unsigned char *)outdata;
1158
1159         fracstep = inwidth*0x10000/outwidth;
1160         for (i = 0;i < outheight;i++)
1161         {
1162                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1163                 frac = fracstep >> 1;
1164                 j = outwidth - 4;
1165                 while (j >= 0)
1166                 {
1167                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1168                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1169                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1170                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1171                         j -= 4;
1172                 }
1173                 if (j & 2)
1174                 {
1175                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1176                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1177                         out += 2;
1178                 }
1179                 if (j & 1)
1180                 {
1181                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1182                         out += 1;
1183                 }
1184         }
1185 }
1186
1187 /*
1188 ================
1189 Image_Resample
1190 ================
1191 */
1192 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1193 {
1194         if (indepth != 1 || outdepth != 1)
1195         {
1196                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1197                 return;
1198         }
1199         if (bytesperpixel == 4)
1200         {
1201                 if (quality)
1202                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1203                 else
1204                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1205         }
1206         else if (bytesperpixel == 3)
1207         {
1208                 if (quality)
1209                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1210                 else
1211                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1212         }
1213         else
1214                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1215 }
1216
1217 // in can be the same as out
1218 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1219 {
1220         int x, y, nextrow;
1221         if (*depth != 1 || destdepth != 1)
1222         {
1223                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1224                 return;
1225         }
1226         nextrow = *width * bytesperpixel;
1227         if (*width > destwidth)
1228         {
1229                 *width >>= 1;
1230                 if (*height > destheight)
1231                 {
1232                         // reduce both
1233                         *height >>= 1;
1234                         if (bytesperpixel == 4)
1235                         {
1236                                 for (y = 0;y < *height;y++)
1237                                 {
1238                                         for (x = 0;x < *width;x++)
1239                                         {
1240                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1241                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1242                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1243                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1244                                                 out += 4;
1245                                                 in += 8;
1246                                         }
1247                                         in += nextrow; // skip a line
1248                                 }
1249                         }
1250                         else if (bytesperpixel == 3)
1251                         {
1252                                 for (y = 0;y < *height;y++)
1253                                 {
1254                                         for (x = 0;x < *width;x++)
1255                                         {
1256                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1257                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1258                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1259                                                 out += 3;
1260                                                 in += 6;
1261                                         }
1262                                         in += nextrow; // skip a line
1263                                 }
1264                         }
1265                         else
1266                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1267                 }
1268                 else
1269                 {
1270                         // reduce width
1271                         if (bytesperpixel == 4)
1272                         {
1273                                 for (y = 0;y < *height;y++)
1274                                 {
1275                                         for (x = 0;x < *width;x++)
1276                                         {
1277                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1278                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1279                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1280                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1281                                                 out += 4;
1282                                                 in += 8;
1283                                         }
1284                                 }
1285                         }
1286                         else if (bytesperpixel == 3)
1287                         {
1288                                 for (y = 0;y < *height;y++)
1289                                 {
1290                                         for (x = 0;x < *width;x++)
1291                                         {
1292                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1293                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1294                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1295                                                 out += 3;
1296                                                 in += 6;
1297                                         }
1298                                 }
1299                         }
1300                         else
1301                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1302                 }
1303         }
1304         else
1305         {
1306                 if (*height > destheight)
1307                 {
1308                         // reduce height
1309                         *height >>= 1;
1310                         if (bytesperpixel == 4)
1311                         {
1312                                 for (y = 0;y < *height;y++)
1313                                 {
1314                                         for (x = 0;x < *width;x++)
1315                                         {
1316                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1317                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1318                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1319                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1320                                                 out += 4;
1321                                                 in += 4;
1322                                         }
1323                                         in += nextrow; // skip a line
1324                                 }
1325                         }
1326                         else if (bytesperpixel == 3)
1327                         {
1328                                 for (y = 0;y < *height;y++)
1329                                 {
1330                                         for (x = 0;x < *width;x++)
1331                                         {
1332                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1333                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1334                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1335                                                 out += 3;
1336                                                 in += 3;
1337                                         }
1338                                         in += nextrow; // skip a line
1339                                 }
1340                         }
1341                         else
1342                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1343                 }
1344                 else
1345                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1346         }
1347 }
1348
1349 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1350 {
1351         int x, y;
1352         const unsigned char *p0, *p1, *p2;
1353         unsigned char *out;
1354         float iwidth, iheight, ibumpscale, n[3];
1355         iwidth = 1.0f / width;
1356         iheight = 1.0f / height;
1357         ibumpscale = (255.0f * 3.0f) / bumpscale;
1358         out = outpixels;
1359         for (y = 0;y < height;y++)
1360         {
1361                 for (x = 0;x < width;x++)
1362                 {
1363                         p0 = inpixels + (y * width + x) * 4;
1364                         if (x == width - 1)
1365                         {
1366                                 if (clamp)
1367                                         p1 = inpixels + (y * width + x) * 4;
1368                                 else
1369                                         p1 = inpixels + (y * width) * 4;
1370                         }
1371                         else
1372                                 p1 = inpixels + (y * width + x + 1) * 4;
1373                         if (y == height - 1)
1374                         {
1375                                 if (clamp)
1376                                         p2 = inpixels + (y * width + x) * 4;
1377                                 else
1378                                         p2 = inpixels + x * 4;
1379                         }
1380                         else
1381                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1382                         /*
1383                         dv[0][0] = iwidth;
1384                         dv[0][1] = 0;
1385                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1386                         dv[1][0] = 0;
1387                         dv[1][1] = iheight;
1388                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1389                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1390                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1391                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1392                         */
1393                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1394                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1395                         n[2] = ibumpscale;
1396                         VectorNormalize(n);
1397                         /*
1398                         // this should work for the bottom right triangle if anyone wants
1399                         // code for that for some reason
1400                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1401                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1402                         n[2] = ibumpscale;
1403                         VectorNormalize(n);
1404                         */
1405                         out[0] = 128.0f + n[0] * 127.0f;
1406                         out[1] = 128.0f + n[1] * 127.0f;
1407                         out[2] = 128.0f + n[2] * 127.0f;
1408                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1409                         out += 4;
1410                 }
1411         }
1412 }
1413
1414 int image_loadskin(imageskin_t *s, const char *shadername)
1415 {
1416         int j;
1417         unsigned char *bumppixels;
1418         int bumppixels_width, bumppixels_height;
1419         char name[MAX_QPATH];
1420         strlcpy(name, shadername, sizeof(name));
1421         Image_StripImageExtension(name, name);
1422         memset(s, 0, sizeof(*s));
1423         s->basepixels = loadimagepixels(name, false, 0, 0);
1424         if (s->basepixels == NULL)
1425                 return false;
1426         s->basepixels_width = image_width;
1427         s->basepixels_height = image_height;
1428
1429         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1430         for (j = 3;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1431                 if (s->basepixels[j] < 255)
1432                         break;
1433         if (j < s->basepixels_width * s->basepixels_height * 4)
1434         {
1435                 // has transparent pixels
1436                 s->maskpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1437                 s->maskpixels_width = s->basepixels_width;
1438                 s->maskpixels_height = s->basepixels_height;
1439                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1440                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1441                 {
1442                         s->maskpixels[j+0] = 255;
1443                         s->maskpixels[j+1] = 255;
1444                         s->maskpixels[j+2] = 255;
1445                 }
1446         }
1447
1448         // _luma is supported for tenebrae compatibility
1449         // (I think it's a very stupid name, but oh well)
1450         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1451          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1452         {
1453                 s->glowpixels_width = image_width;
1454                 s->glowpixels_height = image_height;
1455         }
1456         // _norm is the name used by tenebrae
1457         // (I don't like the name much)
1458         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1459         {
1460                 s->nmappixels_width = image_width;
1461                 s->nmappixels_height = image_height;
1462         }
1463         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1464         {
1465                 bumppixels_width = image_width;
1466                 bumppixels_height = image_height;
1467         }
1468         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1469         {
1470                 s->glosspixels_width = image_width;
1471                 s->glosspixels_height = image_height;
1472         }
1473         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1474         {
1475                 s->pantspixels_width = image_width;
1476                 s->pantspixels_height = image_height;
1477         }
1478         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1479         {
1480                 s->shirtpixels_width = image_width;
1481                 s->shirtpixels_height = image_height;
1482         }
1483
1484         if (s->nmappixels == NULL)
1485         {
1486                 if (bumppixels != NULL)
1487                 {
1488                         if (r_shadow_bumpscale_bumpmap.value > 0)
1489                         {
1490                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1491                                 s->nmappixels_width = bumppixels_width;
1492                                 s->nmappixels_height = bumppixels_height;
1493                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1494                         }
1495                 }
1496                 else
1497                 {
1498                         if (r_shadow_bumpscale_basetexture.value > 0)
1499                         {
1500                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1501                                 s->nmappixels_width = s->basepixels_width;
1502                                 s->nmappixels_height = s->basepixels_height;
1503                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1504                         }
1505                 }
1506         }
1507         if (bumppixels != NULL)
1508                 Mem_Free(bumppixels);
1509         return true;
1510 }
1511
1512 void image_freeskin(imageskin_t *s)
1513 {
1514         if (s->basepixels)
1515                 Mem_Free(s->basepixels);
1516         if (s->maskpixels)
1517                 Mem_Free(s->maskpixels);
1518         if (s->nmappixels)
1519                 Mem_Free(s->nmappixels);
1520         if (s->glowpixels)
1521                 Mem_Free(s->glowpixels);
1522         if (s->glosspixels)
1523                 Mem_Free(s->glosspixels);
1524         if (s->pantspixels)
1525                 Mem_Free(s->pantspixels);
1526         if (s->shirtpixels)
1527                 Mem_Free(s->shirtpixels);
1528         memset(s, 0, sizeof(*s));
1529 }
1530