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                                 if (developer.integer >= 10)
 758                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 759                                 if (developer_memorydebug.integer)
 760                                         Mem_CheckSentinelsGlobal();
 761                                 return data;
 762                         }
 763                 }
 764         }
 765         if (complain)
 766         {
 767                 Con_Printf("Couldn't load %s using ", filename);
 768                 for (format = firstformat;format->formatstring;format++)
 769                 {
 770                         sprintf (name, format->formatstring, basename);
 771                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
 772                 }
 773         }
 774         if (developer_memorydebug.integer)
 775                 Mem_CheckSentinelsGlobal();
 776         return NULL;
 777 }
 778
 779 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 780 {
 781         unsigned char *data;
 782         rtexture_t *rt;
 783         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 784                 return 0;
 785         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 786         Mem_Free(data);
 787         return rt;
 788 }
 789
 790 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
 791 {
 792         qboolean ret;
 793         unsigned char *out;
 794         const unsigned char *in, *end;
 795
 796         memset (buffer, 0, 18);
 797         buffer[2] = 2;          // uncompressed type
 798         buffer[12] = (width >> 0) & 0xFF;
 799         buffer[13] = (width >> 8) & 0xFF;
 800         buffer[14] = (height >> 0) & 0xFF;
 801         buffer[15] = (height >> 8) & 0xFF;
 802         buffer[16] = 24;        // pixel size
 803
 804         // swap rgb to bgr
 805         in = data;
 806         out = buffer + 18;
 807         end = in + width*height*3;
 808         for (;in < end;in += 3)
 809         {
 810                 *out++ = in[2];
 811                 *out++ = in[1];
 812                 *out++ = in[0];
 813         }
 814         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 815
 816         return ret;
 817 }
 818
 819 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
 820 {
 821         int y;
 822         unsigned char *buffer, *out;
 823         const unsigned char *in, *end;
 824
 825         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
 826
 827         memset (buffer, 0, 18);
 828         buffer[2] = 2;          // uncompressed type
 829         buffer[12] = (width >> 0) & 0xFF;
 830         buffer[13] = (width >> 8) & 0xFF;
 831         buffer[14] = (height >> 0) & 0xFF;
 832         buffer[15] = (height >> 8) & 0xFF;
 833         buffer[16] = 32;        // pixel size
 834         buffer[17] = 8; // 8 bits of alpha
 835
 836         // swap rgba to bgra and flip upside down
 837         out = buffer + 18;
 838         for (y = height - 1;y >= 0;y--)
 839         {
 840                 in = data + y * width * 4;
 841                 end = in + width * 4;
 842                 for (;in < end;in += 4)
 843                 {
 844                         *out++ = in[2];
 845                         *out++ = in[1];
 846                         *out++ = in[0];
 847                         *out++ = in[3];
 848                 }
 849         }
 850         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 851
 852         Mem_Free(buffer);
 853 }
 854
 855 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 856 {
 857         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 858         fstep = (int) (inwidth*65536.0f/outwidth);
 859         endx = (inwidth-1);
 860         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 861         {
 862                 xi = f >> 16;
 863                 if (xi != oldx)
 864                 {
 865                         in += (xi - oldx) * 4;
 866                         oldx = xi;
 867                 }
 868                 if (xi < endx)
 869                 {
 870                         lerp = f & 0xFFFF;
 871                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 872                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 873                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 874                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 875                 }
 876                 else // last pixel of the line has no pixel to lerp to
 877                 {
 878                         *out++ = in[0];
 879                         *out++ = in[1];
 880                         *out++ = in[2];
 881                         *out++ = in[3];
 882                 }
 883         }
 884 }
 885
 886 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
 887 {
 888         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 889         fstep = (int) (inwidth*65536.0f/outwidth);
 890         endx = (inwidth-1);
 891         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 892         {
 893                 xi = f >> 16;
 894                 if (xi != oldx)
 895                 {
 896                         in += (xi - oldx) * 3;
 897                         oldx = xi;
 898                 }
 899                 if (xi < endx)
 900                 {
 901                         lerp = f & 0xFFFF;
 902                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 903                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 904                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 905                 }
 906                 else // last pixel of the line has no pixel to lerp to
 907                 {
 908                         *out++ = in[0];
 909                         *out++ = in[1];
 910                         *out++ = in[2];
 911                 }
 912         }
 913 }
 914
 915 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
 916 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
 917 {
 918         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
 919         unsigned char *out;
 920         const unsigned char *inrow;
 921         unsigned char *resamplerow1;
 922         unsigned char *resamplerow2;
 923         out = (unsigned char *)outdata;
 924         fstep = (int) (inheight*65536.0f/outheight);
 925
 926         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
 927         resamplerow2 = resamplerow1 + outwidth*4;
 928
 929         inrow = (const unsigned char *)indata;
 930         oldy = 0;
 931         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 932         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 933         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 934         {
 935                 yi = f >> 16;
 936                 if (yi < endy)
 937                 {
 938                         lerp = f & 0xFFFF;
 939                         if (yi != oldy)
 940                         {
 941                                 inrow = (unsigned char *)indata + inwidth4*yi;
 942                                 if (yi == oldy+1)
 943                                         memcpy(resamplerow1, resamplerow2, outwidth4);
 944                                 else
 945                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 946                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 947                                 oldy = yi;
 948                         }
 949                         j = outwidth - 4;
 950                         while(j >= 0)
 951                         {
 952                                 LERPBYTE( 0);
 953                                 LERPBYTE( 1);
 954                                 LERPBYTE( 2);
 955                                 LERPBYTE( 3);
 956                                 LERPBYTE( 4);
 957                                 LERPBYTE( 5);
 958                                 LERPBYTE( 6);
 959                                 LERPBYTE( 7);
 960                                 LERPBYTE( 8);
 961                                 LERPBYTE( 9);
 962                                 LERPBYTE(10);
 963                                 LERPBYTE(11);
 964                                 LERPBYTE(12);
 965                                 LERPBYTE(13);
 966                                 LERPBYTE(14);
 967                                 LERPBYTE(15);
 968                                 out += 16;
 969                                 resamplerow1 += 16;
 970                                 resamplerow2 += 16;
 971                                 j -= 4;
 972                         }
 973                         if (j & 2)
 974                         {
 975                                 LERPBYTE( 0);
 976                                 LERPBYTE( 1);
 977                                 LERPBYTE( 2);
 978                                 LERPBYTE( 3);
 979                                 LERPBYTE( 4);
 980                                 LERPBYTE( 5);
 981                                 LERPBYTE( 6);
 982                                 LERPBYTE( 7);
 983                                 out += 8;
 984                                 resamplerow1 += 8;
 985                                 resamplerow2 += 8;
 986                         }
 987                         if (j & 1)
 988                         {
 989                                 LERPBYTE( 0);
 990                                 LERPBYTE( 1);
 991                                 LERPBYTE( 2);
 992                                 LERPBYTE( 3);
 993                                 out += 4;
 994                                 resamplerow1 += 4;
 995                                 resamplerow2 += 4;
 996                         }
 997                         resamplerow1 -= outwidth4;
 998                         resamplerow2 -= outwidth4;
 999                 }
1000                 else
1001                 {
1002                         if (yi != oldy)
1003                         {
1004                                 inrow = (unsigned char *)indata + inwidth4*yi;
1005                                 if (yi == oldy+1)
1006                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1007                                 else
1008                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1009                                 oldy = yi;
1010                         }
1011                         memcpy(out, resamplerow1, outwidth4);
1012                 }
1013         }
1014
1015         Mem_Free(resamplerow1);
1016         resamplerow1 = NULL;
1017         resamplerow2 = NULL;
1018 }
1019
1020 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1021 {
1022         int i, j;
1023         unsigned frac, fracstep;
1024         // relies on int being 4 bytes
1025         int *inrow, *out;
1026         out = (int *)outdata;
1027
1028         fracstep = inwidth*0x10000/outwidth;
1029         for (i = 0;i < outheight;i++)
1030         {
1031                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1032                 frac = fracstep >> 1;
1033                 j = outwidth - 4;
1034                 while (j >= 0)
1035                 {
1036                         out[0] = inrow[frac >> 16];frac += fracstep;
1037                         out[1] = inrow[frac >> 16];frac += fracstep;
1038                         out[2] = inrow[frac >> 16];frac += fracstep;
1039                         out[3] = inrow[frac >> 16];frac += fracstep;
1040                         out += 4;
1041                         j -= 4;
1042                 }
1043                 if (j & 2)
1044                 {
1045                         out[0] = inrow[frac >> 16];frac += fracstep;
1046                         out[1] = inrow[frac >> 16];frac += fracstep;
1047                         out += 2;
1048                 }
1049                 if (j & 1)
1050                 {
1051                         out[0] = inrow[frac >> 16];frac += fracstep;
1052                         out += 1;
1053                 }
1054         }
1055 }
1056
1057 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1058 {
1059         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1060         unsigned char *out;
1061         const unsigned char *inrow;
1062         unsigned char *resamplerow1;
1063         unsigned char *resamplerow2;
1064         out = (unsigned char *)outdata;
1065         fstep = (int) (inheight*65536.0f/outheight);
1066
1067         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1068         resamplerow2 = resamplerow1 + outwidth*3;
1069
1070         inrow = (const unsigned char *)indata;
1071         oldy = 0;
1072         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1073         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1074         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1075         {
1076                 yi = f >> 16;
1077                 if (yi < endy)
1078                 {
1079                         lerp = f & 0xFFFF;
1080                         if (yi != oldy)
1081                         {
1082                                 inrow = (unsigned char *)indata + inwidth3*yi;
1083                                 if (yi == oldy+1)
1084                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1085                                 else
1086                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1087                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1088                                 oldy = yi;
1089                         }
1090                         j = outwidth - 4;
1091                         while(j >= 0)
1092                         {
1093                                 LERPBYTE( 0);
1094                                 LERPBYTE( 1);
1095                                 LERPBYTE( 2);
1096                                 LERPBYTE( 3);
1097                                 LERPBYTE( 4);
1098                                 LERPBYTE( 5);
1099                                 LERPBYTE( 6);
1100                                 LERPBYTE( 7);
1101                                 LERPBYTE( 8);
1102                                 LERPBYTE( 9);
1103                                 LERPBYTE(10);
1104                                 LERPBYTE(11);
1105                                 out += 12;
1106                                 resamplerow1 += 12;
1107                                 resamplerow2 += 12;
1108                                 j -= 4;
1109                         }
1110                         if (j & 2)
1111                         {
1112                                 LERPBYTE( 0);
1113                                 LERPBYTE( 1);
1114                                 LERPBYTE( 2);
1115                                 LERPBYTE( 3);
1116                                 LERPBYTE( 4);
1117                                 LERPBYTE( 5);
1118                                 out += 6;
1119                                 resamplerow1 += 6;
1120                                 resamplerow2 += 6;
1121                         }
1122                         if (j & 1)
1123                         {
1124                                 LERPBYTE( 0);
1125                                 LERPBYTE( 1);
1126                                 LERPBYTE( 2);
1127                                 out += 3;
1128                                 resamplerow1 += 3;
1129                                 resamplerow2 += 3;
1130                         }
1131                         resamplerow1 -= outwidth3;
1132                         resamplerow2 -= outwidth3;
1133                 }
1134                 else
1135                 {
1136                         if (yi != oldy)
1137                         {
1138                                 inrow = (unsigned char *)indata + inwidth3*yi;
1139                                 if (yi == oldy+1)
1140                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1141                                 else
1142                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1143                                 oldy = yi;
1144                         }
1145                         memcpy(out, resamplerow1, outwidth3);
1146                 }
1147         }
1148         Mem_Free(resamplerow1);
1149         resamplerow1 = NULL;
1150         resamplerow2 = NULL;
1151 }
1152
1153 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1154 {
1155         int i, j, f, inwidth3 = inwidth * 3;
1156         unsigned frac, fracstep;
1157         unsigned char *inrow, *out;
1158         out = (unsigned char *)outdata;
1159
1160         fracstep = inwidth*0x10000/outwidth;
1161         for (i = 0;i < outheight;i++)
1162         {
1163                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1164                 frac = fracstep >> 1;
1165                 j = outwidth - 4;
1166                 while (j >= 0)
1167                 {
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                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1172                         j -= 4;
1173                 }
1174                 if (j & 2)
1175                 {
1176                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1177                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1178                         out += 2;
1179                 }
1180                 if (j & 1)
1181                 {
1182                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1183                         out += 1;
1184                 }
1185         }
1186 }
1187
1188 /*
1189 ================
1190 Image_Resample
1191 ================
1192 */
1193 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1194 {
1195         if (indepth != 1 || outdepth != 1)
1196         {
1197                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1198                 return;
1199         }
1200         if (bytesperpixel == 4)
1201         {
1202                 if (quality)
1203                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1204                 else
1205                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1206         }
1207         else if (bytesperpixel == 3)
1208         {
1209                 if (quality)
1210                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1211                 else
1212                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1213         }
1214         else
1215                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1216 }
1217
1218 // in can be the same as out
1219 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1220 {
1221         int x, y, nextrow;
1222         if (*depth != 1 || destdepth != 1)
1223         {
1224                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1225                 return;
1226         }
1227         nextrow = *width * bytesperpixel;
1228         if (*width > destwidth)
1229         {
1230                 *width >>= 1;
1231                 if (*height > destheight)
1232                 {
1233                         // reduce both
1234                         *height >>= 1;
1235                         if (bytesperpixel == 4)
1236                         {
1237                                 for (y = 0;y < *height;y++)
1238                                 {
1239                                         for (x = 0;x < *width;x++)
1240                                         {
1241                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1242                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1243                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1244                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1245                                                 out += 4;
1246                                                 in += 8;
1247                                         }
1248                                         in += nextrow; // skip a line
1249                                 }
1250                         }
1251                         else if (bytesperpixel == 3)
1252                         {
1253                                 for (y = 0;y < *height;y++)
1254                                 {
1255                                         for (x = 0;x < *width;x++)
1256                                         {
1257                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1258                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1259                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1260                                                 out += 3;
1261                                                 in += 6;
1262                                         }
1263                                         in += nextrow; // skip a line
1264                                 }
1265                         }
1266                         else
1267                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1268                 }
1269                 else
1270                 {
1271                         // reduce width
1272                         if (bytesperpixel == 4)
1273                         {
1274                                 for (y = 0;y < *height;y++)
1275                                 {
1276                                         for (x = 0;x < *width;x++)
1277                                         {
1278                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1279                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1280                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1281                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1282                                                 out += 4;
1283                                                 in += 8;
1284                                         }
1285                                 }
1286                         }
1287                         else if (bytesperpixel == 3)
1288                         {
1289                                 for (y = 0;y < *height;y++)
1290                                 {
1291                                         for (x = 0;x < *width;x++)
1292                                         {
1293                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1294                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1295                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1296                                                 out += 3;
1297                                                 in += 6;
1298                                         }
1299                                 }
1300                         }
1301                         else
1302                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1303                 }
1304         }
1305         else
1306         {
1307                 if (*height > destheight)
1308                 {
1309                         // reduce height
1310                         *height >>= 1;
1311                         if (bytesperpixel == 4)
1312                         {
1313                                 for (y = 0;y < *height;y++)
1314                                 {
1315                                         for (x = 0;x < *width;x++)
1316                                         {
1317                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1318                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1319                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1320                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1321                                                 out += 4;
1322                                                 in += 4;
1323                                         }
1324                                         in += nextrow; // skip a line
1325                                 }
1326                         }
1327                         else if (bytesperpixel == 3)
1328                         {
1329                                 for (y = 0;y < *height;y++)
1330                                 {
1331                                         for (x = 0;x < *width;x++)
1332                                         {
1333                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1334                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1335                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1336                                                 out += 3;
1337                                                 in += 3;
1338                                         }
1339                                         in += nextrow; // skip a line
1340                                 }
1341                         }
1342                         else
1343                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1344                 }
1345                 else
1346                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1347         }
1348 }
1349
1350 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1351 {
1352         int x, y;
1353         const unsigned char *p0, *p1, *p2;
1354         unsigned char *out;
1355         float iwidth, iheight, ibumpscale, n[3];
1356         iwidth = 1.0f / width;
1357         iheight = 1.0f / height;
1358         ibumpscale = (255.0f * 3.0f) / bumpscale;
1359         out = outpixels;
1360         for (y = 0;y < height;y++)
1361         {
1362                 for (x = 0;x < width;x++)
1363                 {
1364                         p0 = inpixels + (y * width + x) * 4;
1365                         if (x == width - 1)
1366                         {
1367                                 if (clamp)
1368                                         p1 = inpixels + (y * width + x) * 4;
1369                                 else
1370                                         p1 = inpixels + (y * width) * 4;
1371                         }
1372                         else
1373                                 p1 = inpixels + (y * width + x + 1) * 4;
1374                         if (y == height - 1)
1375                         {
1376                                 if (clamp)
1377                                         p2 = inpixels + (y * width + x) * 4;
1378                                 else
1379                                         p2 = inpixels + x * 4;
1380                         }
1381                         else
1382                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1383                         /*
1384                         dv[0][0] = iwidth;
1385                         dv[0][1] = 0;
1386                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1387                         dv[1][0] = 0;
1388                         dv[1][1] = iheight;
1389                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1390                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1391                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1392                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1393                         */
1394                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1395                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1396                         n[2] = ibumpscale;
1397                         VectorNormalize(n);
1398                         /*
1399                         // this should work for the bottom right triangle if anyone wants
1400                         // code for that for some reason
1401                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1402                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1403                         n[2] = ibumpscale;
1404                         VectorNormalize(n);
1405                         */
1406                         out[0] = (int)(128.0f + n[0] * 127.0f);
1407                         out[1] = (int)(128.0f + n[1] * 127.0f);
1408                         out[2] = (int)(128.0f + n[2] * 127.0f);
1409                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1410                         out += 4;
1411                 }
1412         }
1413 }
1414
1415 int image_loadskin(imageskin_t *s, const char *shadername)
1416 {
1417         int j;
1418         unsigned char *bumppixels;
1419         int bumppixels_width, bumppixels_height;
1420         char name[MAX_QPATH];
1421         strlcpy(name, shadername, sizeof(name));
1422         Image_StripImageExtension(name, name);
1423         memset(s, 0, sizeof(*s));
1424         s->basepixels = loadimagepixels(name, false, 0, 0);
1425         if (s->basepixels == NULL)
1426                 return false;
1427         s->basepixels_width = image_width;
1428         s->basepixels_height = image_height;
1429
1430         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1431         for (j = 3;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1432                 if (s->basepixels[j] < 255)
1433                         break;
1434         if (j < s->basepixels_width * s->basepixels_height * 4)
1435         {
1436                 // has transparent pixels
1437                 s->maskpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1438                 s->maskpixels_width = s->basepixels_width;
1439                 s->maskpixels_height = s->basepixels_height;
1440                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1441                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1442                 {
1443                         s->maskpixels[j+0] = 255;
1444                         s->maskpixels[j+1] = 255;
1445                         s->maskpixels[j+2] = 255;
1446                 }
1447         }
1448
1449         // _luma is supported for tenebrae compatibility
1450         // (I think it's a very stupid name, but oh well)
1451         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1452          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1453         {
1454                 s->glowpixels_width = image_width;
1455                 s->glowpixels_height = image_height;
1456         }
1457         // _norm is the name used by tenebrae
1458         // (I don't like the name much)
1459         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1460         {
1461                 s->nmappixels_width = image_width;
1462                 s->nmappixels_height = image_height;
1463         }
1464         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1465         {
1466                 bumppixels_width = image_width;
1467                 bumppixels_height = image_height;
1468         }
1469         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1470         {
1471                 s->glosspixels_width = image_width;
1472                 s->glosspixels_height = image_height;
1473         }
1474         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1475         {
1476                 s->pantspixels_width = image_width;
1477                 s->pantspixels_height = image_height;
1478         }
1479         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1480         {
1481                 s->shirtpixels_width = image_width;
1482                 s->shirtpixels_height = image_height;
1483         }
1484
1485         if (s->nmappixels == NULL)
1486         {
1487                 if (bumppixels != NULL)
1488                 {
1489                         if (r_shadow_bumpscale_bumpmap.value > 0)
1490                         {
1491                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1492                                 s->nmappixels_width = bumppixels_width;
1493                                 s->nmappixels_height = bumppixels_height;
1494                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1495                         }
1496                 }
1497                 else
1498                 {
1499                         if (r_shadow_bumpscale_basetexture.value > 0)
1500                         {
1501                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1502                                 s->nmappixels_width = s->basepixels_width;
1503                                 s->nmappixels_height = s->basepixels_height;
1504                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1505                         }
1506                 }
1507         }
1508         if (bumppixels != NULL)
1509                 Mem_Free(bumppixels);
1510         return true;
1511 }
1512
1513 void image_freeskin(imageskin_t *s)
1514 {
1515         if (s->basepixels)
1516                 Mem_Free(s->basepixels);
1517         if (s->maskpixels)
1518                 Mem_Free(s->maskpixels);
1519         if (s->nmappixels)
1520                 Mem_Free(s->nmappixels);
1521         if (s->glowpixels)
1522                 Mem_Free(s->glowpixels);
1523         if (s->glosspixels)
1524                 Mem_Free(s->glosspixels);
1525         if (s->pantspixels)
1526                 Mem_Free(s->pantspixels);
1527         if (s->shirtpixels)
1528                 Mem_Free(s->shirtpixels);
1529         memset(s, 0, sizeof(*s));
1530 }
1531