image.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5 #include "r_shadow.h"
   6
   7 int             image_width;
   8 int             image_height;
   9
  10 void Image_GammaRemapRGB(const qbyte *in, qbyte *out, int pixels, const qbyte *gammar, const qbyte *gammag, const qbyte *gammab)
  11 {
  12         while (pixels--)
  13         {
  14                 out[0] = gammar[in[0]];
  15                 out[1] = gammag[in[1]];
  16                 out[2] = gammab[in[2]];
  17                 in += 3;
  18                 out += 3;
  19         }
  20 }
  21
  22 // note: pal must be 32bit color
  23 void Image_Copy8bitRGBA(const qbyte *in, qbyte *out, int pixels, const unsigned int *pal)
  24 {
  25         int *iout = (void *)out;
  26         while (pixels >= 8)
  27         {
  28                 iout[0] = pal[in[0]];
  29                 iout[1] = pal[in[1]];
  30                 iout[2] = pal[in[2]];
  31                 iout[3] = pal[in[3]];
  32                 iout[4] = pal[in[4]];
  33                 iout[5] = pal[in[5]];
  34                 iout[6] = pal[in[6]];
  35                 iout[7] = pal[in[7]];
  36                 in += 8;
  37                 iout += 8;
  38                 pixels -= 8;
  39         }
  40         if (pixels & 4)
  41         {
  42                 iout[0] = pal[in[0]];
  43                 iout[1] = pal[in[1]];
  44                 iout[2] = pal[in[2]];
  45                 iout[3] = pal[in[3]];
  46                 in += 4;
  47                 iout += 4;
  48         }
  49         if (pixels & 2)
  50         {
  51                 iout[0] = pal[in[0]];
  52                 iout[1] = pal[in[1]];
  53                 in += 2;
  54                 iout += 2;
  55         }
  56         if (pixels & 1)
  57                 iout[0] = pal[in[0]];
  58 }
  59
  60 /*
  61 =================================================================
  62
  63   PCX Loading
  64
  65 =================================================================
  66 */
  67
  68 typedef struct
  69 {
  70     char        manufacturer;
  71     char        version;
  72     char        encoding;
  73     char        bits_per_pixel;
  74     unsigned short      xmin,ymin,xmax,ymax;
  75     unsigned short      hres,vres;
  76     unsigned char       palette[48];
  77     char        reserved;
  78     char        color_planes;
  79     unsigned short      bytes_per_line;
  80     unsigned short      palette_type;
  81     char        filler[58];
  82 } pcx_t;
  83
  84 /*
  85 ============
  86 LoadPCX
  87 ============
  88 */
  89 qbyte* LoadPCX (qbyte *f, int matchwidth, int matchheight)
  90 {
  91         pcx_t pcx;
  92         qbyte *a, *b, *image_rgba, *pbuf;
  93         const qbyte *palette, *fin, *enddata;
  94         int x, y, x2, dataByte;
  95
  96         if (fs_filesize < (int)sizeof(pcx) + 768)
  97         {
  98                 Con_Printf ("Bad pcx file\n");
  99                 return NULL;
 100         }
 101
 102         fin = f;
 103
 104         memcpy(&pcx, fin, sizeof(pcx));
 105         fin += sizeof(pcx);
 106
 107         // LordHavoc: big-endian support ported from QF newtree
 108         pcx.xmax = LittleShort (pcx.xmax);
 109         pcx.xmin = LittleShort (pcx.xmin);
 110         pcx.ymax = LittleShort (pcx.ymax);
 111         pcx.ymin = LittleShort (pcx.ymin);
 112         pcx.hres = LittleShort (pcx.hres);
 113         pcx.vres = LittleShort (pcx.vres);
 114         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 115         pcx.palette_type = LittleShort (pcx.palette_type);
 116
 117         image_width = pcx.xmax + 1 - pcx.xmin;
 118         image_height = pcx.ymax + 1 - pcx.ymin;
 119         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)
 120         {
 121                 Con_Printf ("Bad pcx file\n");
 122                 return NULL;
 123         }
 124         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 125                 return NULL;
 126
 127         palette = f + fs_filesize - 768;
 128
 129         image_rgba = Mem_Alloc(tempmempool, image_width*image_height*4);
 130         if (!image_rgba)
 131         {
 132                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 133                 return NULL;
 134         }
 135         pbuf = image_rgba + image_width*image_height*3;
 136         enddata = palette;
 137
 138         for (y = 0;y < image_height && fin < enddata;y++)
 139         {
 140                 a = pbuf + y * image_width;
 141                 for (x = 0;x < image_width && fin < enddata;)
 142                 {
 143                         dataByte = *fin++;
 144                         if(dataByte >= 0xC0)
 145                         {
 146                                 if (fin >= enddata)
 147                                         break;
 148                                 x2 = x + (dataByte & 0x3F);
 149                                 dataByte = *fin++;
 150                                 if (x2 > image_width)
 151                                         x2 = image_width; // technically an error
 152                                 while(x < x2)
 153                                         a[x++] = dataByte;
 154                         }
 155                         else
 156                                 a[x++] = dataByte;
 157                 }
 158                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
 159                 while(x < image_width)
 160                         a[x++] = 0;
 161         }
 162
 163         a = image_rgba;
 164         b = pbuf;
 165
 166         for(x = 0;x < image_width*image_height;x++)
 167         {
 168                 y = *b++ * 3;
 169                 *a++ = palette[y];
 170                 *a++ = palette[y+1];
 171                 *a++ = palette[y+2];
 172                 *a++ = 255;
 173         }
 174
 175         return image_rgba;
 176 }
 177
 178 /*
 179 =========================================================
 180
 181 TARGA LOADING
 182
 183 =========================================================
 184 */
 185
 186 typedef struct _TargaHeader
 187 {
 188         unsigned char   id_length, colormap_type, image_type;
 189         unsigned short  colormap_index, colormap_length;
 190         unsigned char   colormap_size;
 191         unsigned short  x_origin, y_origin, width, height;
 192         unsigned char   pixel_size, attributes;
 193 }
 194 TargaHeader;
 195
 196 void PrintTargaHeader(TargaHeader *t)
 197 {
 198         Con_Printf("TargaHeader:\n");
 199         Con_Printf("uint8 id_length = %i;\n", t->id_length);
 200         Con_Printf("uint8 colormap_type = %i;\n", t->colormap_type);
 201         Con_Printf("uint8 image_type = %i;\n", t->image_type);
 202         Con_Printf("uint16 colormap_index = %i;\n", t->colormap_index);
 203         Con_Printf("uint16 colormap_length = %i;\n", t->colormap_length);
 204         Con_Printf("uint8 colormap_size = %i;\n", t->colormap_size);
 205         Con_Printf("uint16 x_origin = %i;\n", t->x_origin);
 206         Con_Printf("uint16 y_origin = %i;\n", t->y_origin);
 207         Con_Printf("uint16 width = %i;\n", t->width);
 208         Con_Printf("uint16 height = %i;\n", t->height);
 209         Con_Printf("uint8 pixel_size = %i;\n", t->pixel_size);
 210         Con_Printf("uint8 attributes = %i;\n", t->attributes);
 211 }
 212
 213 /*
 214 =============
 215 LoadTGA
 216 =============
 217 */
 218 qbyte *LoadTGA (qbyte *f, int matchwidth, int matchheight)
 219 {
 220         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen;
 221         qbyte *pixbuf, *image_rgba;
 222         qbyte *fin, *enddata;
 223         TargaHeader targa_header;
 224         unsigned char palette[256*4], *p;
 225
 226         if (fs_filesize < 19)
 227                 return NULL;
 228
 229         enddata = f + fs_filesize;
 230
 231         targa_header.id_length = f[0];
 232         targa_header.colormap_type = f[1];
 233         targa_header.image_type = f[2];
 234
 235         targa_header.colormap_index = f[3] + f[4] * 256;
 236         targa_header.colormap_length = f[5] + f[6] * 256;
 237         targa_header.colormap_size = f[7];
 238         targa_header.x_origin = f[8] + f[9] * 256;
 239         targa_header.y_origin = f[10] + f[11] * 256;
 240         targa_header.width = image_width = f[12] + f[13] * 256;
 241         targa_header.height = image_height = f[14] + f[15] * 256;
 242         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 243         {
 244                 Con_Printf("LoadTGA: invalid size\n");
 245                 PrintTargaHeader(&targa_header);
 246                 return NULL;
 247         }
 248         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 249                 return NULL;
 250         targa_header.pixel_size = f[16];
 251         targa_header.attributes = f[17];
 252
 253         fin = f + 18;
 254         if (targa_header.id_length != 0)
 255                 fin += targa_header.id_length;  // skip TARGA image comment
 256         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 257         {
 258                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 259                 {
 260                         Con_Printf ("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 261                         PrintTargaHeader(&targa_header);
 262                         return NULL;
 263                 }
 264         }
 265         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 266         {
 267                 if (targa_header.pixel_size != 8)
 268                 {
 269                         Con_Printf ("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 270                         PrintTargaHeader(&targa_header);
 271                         return NULL;
 272                 }
 273                 if (targa_header.colormap_length != 256)
 274                 {
 275                         Con_Printf ("LoadTGA: only 256 colormap_length supported\n");
 276                         PrintTargaHeader(&targa_header);
 277                         return NULL;
 278                 }
 279                 if (targa_header.colormap_index)
 280                 {
 281                         Con_Printf ("LoadTGA: colormap_index not supported\n");
 282                         PrintTargaHeader(&targa_header);
 283                         return NULL;
 284                 }
 285                 if (targa_header.colormap_size == 24)
 286                 {
 287                         for (x = 0;x < targa_header.colormap_length;x++)
 288                         {
 289                                 palette[x*4+2] = *fin++;
 290                                 palette[x*4+1] = *fin++;
 291                                 palette[x*4+0] = *fin++;
 292                                 palette[x*4+3] = 255;
 293                         }
 294                 }
 295                 else if (targa_header.colormap_size == 32)
 296                 {
 297                         for (x = 0;x < targa_header.colormap_length;x++)
 298                         {
 299                                 palette[x*4+2] = *fin++;
 300                                 palette[x*4+1] = *fin++;
 301                                 palette[x*4+0] = *fin++;
 302                                 palette[x*4+3] = *fin++;
 303                         }
 304                 }
 305                 else
 306                 {
 307                         Con_Printf ("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 308                         PrintTargaHeader(&targa_header);
 309                         return NULL;
 310                 }
 311         }
 312         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
 313         {
 314                 if (targa_header.pixel_size != 8)
 315                 {
 316                         Con_Printf ("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 317                         PrintTargaHeader(&targa_header);
 318                         return NULL;
 319                 }
 320         }
 321         else
 322         {
 323                 Con_Printf ("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 324                 PrintTargaHeader(&targa_header);
 325                 return NULL;
 326         }
 327
 328         if (targa_header.attributes & 0x10)
 329         {
 330                 Con_Printf ("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 331                 return NULL;
 332         }
 333
 334         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 335         if (!image_rgba)
 336         {
 337                 Con_Printf ("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 338                 return NULL;
 339         }
 340
 341         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 342         if ((targa_header.attributes & 0x20) == 0)
 343         {
 344                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 345                 row_inc = -image_width*4*2;
 346         }
 347         else
 348         {
 349                 pixbuf = image_rgba;
 350                 row_inc = 0;
 351         }
 352
 353         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 354         x = 0;
 355         y = 0;
 356         red = green = blue = alpha = 255;
 357         while (y < image_height)
 358         {
 359                 // decoder is mostly the same whether it's compressed or not
 360                 readpixelcount = 1000000;
 361                 runlen = 1000000;
 362                 if (compressed && fin < enddata)
 363                 {
 364                         runlen = *fin++;
 365                         // high bit indicates this is an RLE compressed run
 366                         if (runlen & 0x80)
 367                                 readpixelcount = 1;
 368                         runlen = 1 + (runlen & 0x7f);
 369                 }
 370
 371                 while((runlen--) && y < image_height)
 372                 {
 373                         if (readpixelcount > 0)
 374                         {
 375                                 readpixelcount--;
 376                                 red = green = blue = alpha = 255;
 377                                 if (fin < enddata)
 378                                 {
 379                                         switch(targa_header.image_type)
 380                                         {
 381                                         case 1:
 382                                         case 9:
 383                                                 // colormapped
 384                                                 p = palette + (*fin++) * 4;
 385                                                 red = p[0];
 386                                                 green = p[1];
 387                                                 blue = p[2];
 388                                                 alpha = p[3];
 389                                                 break;
 390                                         case 2:
 391                                         case 10:
 392                                                 // BGR or BGRA
 393                                                 blue = *fin++;
 394                                                 if (fin < enddata)
 395                                                         green = *fin++;
 396                                                 if (fin < enddata)
 397                                                         red = *fin++;
 398                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 399                                                         alpha = *fin++;
 400                                                 break;
 401                                         case 3:
 402                                         case 11:
 403                                                 // greyscale
 404                                                 red = green = blue = *fin++;
 405                                                 break;
 406                                         }
 407                                 }
 408                         }
 409                         *pixbuf++ = red;
 410                         *pixbuf++ = green;
 411                         *pixbuf++ = blue;
 412                         *pixbuf++ = alpha;
 413                         x++;
 414                         if (x == image_width)
 415                         {
 416                                 // end of line, advance to next
 417                                 x = 0;
 418                                 y++;
 419                                 pixbuf += row_inc;
 420                         }
 421                 }
 422         }
 423
 424         return image_rgba;
 425 }
 426
 427 /*
 428 ============
 429 LoadLMP
 430 ============
 431 */
 432 qbyte *LoadLMP (qbyte *f, int matchwidth, int matchheight)
 433 {
 434         qbyte *image_rgba;
 435
 436         if (fs_filesize < 9)
 437         {
 438                 Con_Printf("LoadLMP: invalid LMP file\n");
 439                 return NULL;
 440         }
 441
 442         // parse the very complicated header *chuckle*
 443         image_width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
 444         image_height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
 445         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 446         {
 447                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 448                 return NULL;
 449         }
 450         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 451                 return NULL;
 452
 453         if (fs_filesize < 8 + image_width * image_height)
 454         {
 455                 Con_Printf("LoadLMP: invalid LMP file\n");
 456                 return NULL;
 457         }
 458
 459         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 460         if (!image_rgba)
 461         {
 462                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 463                 return NULL;
 464         }
 465         Image_Copy8bitRGBA(f + 8, image_rgba, image_width * image_height, palette_complete);
 466         return image_rgba;
 467 }
 468
 469 typedef struct
 470 {
 471         char            name[32];
 472         unsigned        width, height;
 473         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 474         char            animname[32];                   // next frame in animation chain
 475         int                     flags;
 476         int                     contents;
 477         int                     value;
 478 } q2wal_t;
 479
 480 qbyte *LoadWAL (qbyte *f, int matchwidth, int matchheight)
 481 {
 482         qbyte *image_rgba;
 483         const q2wal_t *inwal = (const void *)f;
 484
 485         if (fs_filesize < (int) sizeof(q2wal_t))
 486         {
 487                 Con_Printf("LoadWAL: invalid WAL file\n");
 488                 return NULL;
 489         }
 490
 491         image_width = LittleLong(inwal->width);
 492         image_height = LittleLong(inwal->height);
 493         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 494         {
 495                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 496                 return NULL;
 497         }
 498         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 499                 return NULL;
 500
 501         if ((int) fs_filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 502         {
 503                 Con_Printf("LoadWAL: invalid WAL file\n");
 504                 return NULL;
 505         }
 506
 507         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 508         if (!image_rgba)
 509         {
 510                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 511                 return NULL;
 512         }
 513         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 514         return image_rgba;
 515 }
 516
 517
 518
 519 /*
 520 ============
 521 LoadLMP
 522 ============
 523 */
 524 qbyte *LoadLMPAs8Bit (qbyte *f, int matchwidth, int matchheight)
 525 {
 526         qbyte *image_8bit;
 527
 528         if (fs_filesize < 9)
 529         {
 530                 Con_Printf("LoadLMPAs8Bit: invalid LMP file\n");
 531                 return NULL;
 532         }
 533
 534         // parse the very complicated header *chuckle*
 535         image_width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
 536         image_height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
 537         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 538         {
 539                 Con_Printf("LoadLMPAs8Bit: invalid size %ix%i\n", image_width, image_height);
 540                 return NULL;
 541         }
 542         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 543                 return NULL;
 544
 545         if (fs_filesize < 8 + image_width * image_height)
 546         {
 547                 Con_Printf("LoadLMPAs8Bit: invalid LMP file\n");
 548                 return NULL;
 549         }
 550
 551         image_8bit = Mem_Alloc(tempmempool, image_width * image_height);
 552         if (!image_8bit)
 553         {
 554                 Con_Printf("LoadLMPAs8Bit: not enough memory for %i by %i image\n", image_width, image_height);
 555                 return NULL;
 556         }
 557         memcpy(image_8bit, f + 8, image_width * image_height);
 558         return image_8bit;
 559 }
 560
 561 void Image_StripImageExtension (const char *in, char *out)
 562 {
 563         const char *end, *temp;
 564         end = in + strlen(in);
 565         if ((end - in) >= 4)
 566         {
 567                 temp = end - 4;
 568                 if (strcmp(temp, ".tga") == 0
 569                  || strcmp(temp, ".pcx") == 0
 570                  || strcmp(temp, ".lmp") == 0
 571                  || strcmp(temp, ".png") == 0
 572                  || strcmp(temp, ".jpg") == 0)
 573                         end = temp;
 574                 while (in < end)
 575                         *out++ = *in++;
 576                 *out++ = 0;
 577         }
 578         else
 579                 strcpy(out, in);
 580 }
 581
 582 struct
 583 {
 584         const char *formatstring;
 585         qbyte *(*loadfunc)(qbyte *f, int matchwidth, int matchheight);
 586 }
 587 imageformats[] =
 588 {
 589         {"override/%s.tga", LoadTGA},
 590         {"override/%s.jpg", JPEG_LoadImage},
 591         {"textures/%s.tga", LoadTGA},
 592         {"textures/%s.jpg", JPEG_LoadImage},
 593         {"textures/%s.pcx", LoadPCX},
 594         {"textures/%s.wal", LoadWAL},
 595         {"%s.tga", LoadTGA},
 596         {"%s.jpg", JPEG_LoadImage},
 597         {"%s.pcx", LoadPCX},
 598         {"%s.lmp", LoadLMP},
 599         {NULL, NULL}
 600 };
 601
 602 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 603 {
 604         int i;
 605         qbyte *f, *data = NULL;
 606         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 607         if (developer_memorydebug.integer)
 608                 Mem_CheckSentinelsGlobal();
 609         Image_StripImageExtension(filename, basename); // strip filename extensions to allow replacement by other types
 610         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 611         for (c = basename;*c;c++)
 612                 if (*c == '*')
 613                         *c = '#';
 614         for (i = 0;imageformats[i].formatstring;i++)
 615         {
 616                 sprintf (name, imageformats[i].formatstring, basename);
 617                 if ((f = FS_LoadFile(name, true)) && (data = imageformats[i].loadfunc(f, matchwidth, matchheight)))
 618                 {
 619                         Mem_Free(f);
 620                         Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 621                         if (developer_memorydebug.integer)
 622                                 Mem_CheckSentinelsGlobal();
 623                         return data;
 624                 }
 625         }
 626         if (complain)
 627         {
 628                 Con_Printf ("Couldn't load %s using ", filename);
 629                 for (i = 0;imageformats[i].formatstring;i++)
 630                 {
 631                         sprintf (name, imageformats[i].formatstring, basename);
 632                         Con_Printf (i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
 633                 }
 634         }
 635         if (developer_memorydebug.integer)
 636                 Mem_CheckSentinelsGlobal();
 637         return NULL;
 638 }
 639
 640 int image_makemask (const qbyte *in, qbyte *out, int size)
 641 {
 642         int i, count;
 643         count = 0;
 644         for (i = 0;i < size;i++)
 645         {
 646                 out[0] = out[1] = out[2] = 255;
 647                 out[3] = in[3];
 648                 if (in[3] != 255)
 649                         count++;
 650                 in += 4;
 651                 out += 4;
 652         }
 653         return count;
 654 }
 655
 656 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 657 {
 658         qbyte *in, *data;
 659         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 660         if (!data)
 661                 return NULL;
 662         if (image_makemask(data, data, image_width * image_height))
 663                 return data; // some transparency
 664         else
 665         {
 666                 Mem_Free(data);
 667                 return NULL; // all opaque
 668         }
 669 }
 670
 671 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 672 {
 673         qbyte *data;
 674         rtexture_t *rt;
 675         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 676                 return 0;
 677         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 678         Mem_Free(data);
 679         return rt;
 680 }
 681
 682 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 683 {
 684         qbyte *data;
 685         rtexture_t *rt;
 686         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
 687                 return 0;
 688         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 689         Mem_Free(data);
 690         return rt;
 691 }
 692
 693 rtexture_t *image_masktex;
 694 rtexture_t *image_nmaptex;
 695 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 696 {
 697         qbyte *data;
 698         rtexture_t *rt;
 699         image_masktex = NULL;
 700         image_nmaptex = NULL;
 701         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 702                 return 0;
 703
 704         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 705
 706         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 707                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 708
 709         Mem_Free(data);
 710         return rt;
 711 }
 712
 713 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 714 {
 715         qbyte *data, *data2;
 716         rtexture_t *rt;
 717         image_masktex = NULL;
 718         image_nmaptex = NULL;
 719         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 720                 return 0;
 721
 722         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 723
 724         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 725
 726         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 727         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 728
 729         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 730                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 731
 732         Mem_Free(data2);
 733
 734         Mem_Free(data);
 735         return rt;
 736 }
 737
 738 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 739 {
 740         qbyte *data, *data2;
 741         rtexture_t *rt;
 742         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 743                 return 0;
 744         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 745
 746         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 747         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 748
 749         Mem_Free(data2);
 750         Mem_Free(data);
 751         return rt;
 752 }
 753
 754 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data)
 755 {
 756         qboolean ret;
 757         qbyte *buffer, *out;
 758         const qbyte *in, *end;
 759
 760         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 761
 762         memset (buffer, 0, 18);
 763         buffer[2] = 2;          // uncompressed type
 764         buffer[12] = (width >> 0) & 0xFF;
 765         buffer[13] = (width >> 8) & 0xFF;
 766         buffer[14] = (height >> 0) & 0xFF;
 767         buffer[15] = (height >> 8) & 0xFF;
 768         buffer[16] = 24;        // pixel size
 769
 770         // swap rgb to bgr
 771         in = data;
 772         out = buffer + 18;
 773         end = in + width*height*3;
 774         for (;in < end;in += 3)
 775         {
 776                 *out++ = in[2];
 777                 *out++ = in[1];
 778                 *out++ = in[0];
 779         }
 780         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 781
 782         Mem_Free(buffer);
 783         return ret;
 784 }
 785
 786 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
 787 {
 788         int y;
 789         qbyte *buffer, *out;
 790         const qbyte *in, *end;
 791
 792         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 793
 794         memset (buffer, 0, 18);
 795         buffer[2] = 2;          // uncompressed type
 796         buffer[12] = (width >> 0) & 0xFF;
 797         buffer[13] = (width >> 8) & 0xFF;
 798         buffer[14] = (height >> 0) & 0xFF;
 799         buffer[15] = (height >> 8) & 0xFF;
 800         buffer[16] = 24;        // pixel size
 801
 802         // swap rgb to bgr and flip upside down
 803         out = buffer + 18;
 804         for (y = height - 1;y >= 0;y--)
 805         {
 806                 in = data + y * width * 3;
 807                 end = in + width * 3;
 808                 for (;in < end;in += 3)
 809                 {
 810                         *out++ = in[2];
 811                         *out++ = in[1];
 812                         *out++ = in[0];
 813                 }
 814         }
 815         FS_WriteFile (filename, buffer, width*height*3 + 18 );
 816
 817         Mem_Free(buffer);
 818 }
 819
 820 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
 821 {
 822         int y;
 823         qbyte *buffer, *out;
 824         const qbyte *in, *end;
 825
 826         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
 827
 828         memset (buffer, 0, 18);
 829         buffer[2] = 2;          // uncompressed type
 830         buffer[12] = (width >> 0) & 0xFF;
 831         buffer[13] = (width >> 8) & 0xFF;
 832         buffer[14] = (height >> 0) & 0xFF;
 833         buffer[15] = (height >> 8) & 0xFF;
 834         buffer[16] = 32;        // pixel size
 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 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
 856 {
 857         const qbyte *end;
 858         if (rgba)
 859         {
 860                 // check alpha bytes
 861                 for (end = data + size * 4, data += 3;data < end;data += 4)
 862                         if (*data < 255)
 863                                 return 1;
 864         }
 865         else
 866         {
 867                 // color 255 is transparent
 868                 for (end = data + size;data < end;data++)
 869                         if (*data == 255)
 870                                 return 1;
 871         }
 872         return 0;
 873 }
 874
 875 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 876 {
 877         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 878         fstep = (int) (inwidth*65536.0f/outwidth);
 879         endx = (inwidth-1);
 880         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 881         {
 882                 xi = f >> 16;
 883                 if (xi != oldx)
 884                 {
 885                         in += (xi - oldx) * 4;
 886                         oldx = xi;
 887                 }
 888                 if (xi < endx)
 889                 {
 890                         lerp = f & 0xFFFF;
 891                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 892                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 893                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 894                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 895                 }
 896                 else // last pixel of the line has no pixel to lerp to
 897                 {
 898                         *out++ = in[0];
 899                         *out++ = in[1];
 900                         *out++ = in[2];
 901                         *out++ = in[3];
 902                 }
 903         }
 904 }
 905
 906 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 907 {
 908         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 909         fstep = (int) (inwidth*65536.0f/outwidth);
 910         endx = (inwidth-1);
 911         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 912         {
 913                 xi = f >> 16;
 914                 if (xi != oldx)
 915                 {
 916                         in += (xi - oldx) * 3;
 917                         oldx = xi;
 918                 }
 919                 if (xi < endx)
 920                 {
 921                         lerp = f & 0xFFFF;
 922                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 923                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 924                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 925                 }
 926                 else // last pixel of the line has no pixel to lerp to
 927                 {
 928                         *out++ = in[0];
 929                         *out++ = in[1];
 930                         *out++ = in[2];
 931                 }
 932         }
 933 }
 934
 935 int resamplerowsize = 0;
 936 qbyte *resamplerow1 = NULL;
 937 qbyte *resamplerow2 = NULL;
 938 mempool_t *resamplemempool = NULL;
 939
 940 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
 941 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
 942 {
 943         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
 944         qbyte *out;
 945         const qbyte *inrow;
 946         out = outdata;
 947         fstep = (int) (inheight*65536.0f/outheight);
 948
 949         inrow = indata;
 950         oldy = 0;
 951         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 952         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 953         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 954         {
 955                 yi = f >> 16;
 956                 if (yi < endy)
 957                 {
 958                         lerp = f & 0xFFFF;
 959                         if (yi != oldy)
 960                         {
 961                                 inrow = (qbyte *)indata + inwidth4*yi;
 962                                 if (yi == oldy+1)
 963                                         memcpy(resamplerow1, resamplerow2, outwidth4);
 964                                 else
 965                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 966                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 967                                 oldy = yi;
 968                         }
 969                         j = outwidth - 4;
 970                         while(j >= 0)
 971                         {
 972                                 LERPBYTE( 0);
 973                                 LERPBYTE( 1);
 974                                 LERPBYTE( 2);
 975                                 LERPBYTE( 3);
 976                                 LERPBYTE( 4);
 977                                 LERPBYTE( 5);
 978                                 LERPBYTE( 6);
 979                                 LERPBYTE( 7);
 980                                 LERPBYTE( 8);
 981                                 LERPBYTE( 9);
 982                                 LERPBYTE(10);
 983                                 LERPBYTE(11);
 984                                 LERPBYTE(12);
 985                                 LERPBYTE(13);
 986                                 LERPBYTE(14);
 987                                 LERPBYTE(15);
 988                                 out += 16;
 989                                 resamplerow1 += 16;
 990                                 resamplerow2 += 16;
 991                                 j -= 4;
 992                         }
 993                         if (j & 2)
 994                         {
 995                                 LERPBYTE( 0);
 996                                 LERPBYTE( 1);
 997                                 LERPBYTE( 2);
 998                                 LERPBYTE( 3);
 999                                 LERPBYTE( 4);
1000                                 LERPBYTE( 5);
1001                                 LERPBYTE( 6);
1002                                 LERPBYTE( 7);
1003                                 out += 8;
1004                                 resamplerow1 += 8;
1005                                 resamplerow2 += 8;
1006                         }
1007                         if (j & 1)
1008                         {
1009                                 LERPBYTE( 0);
1010                                 LERPBYTE( 1);
1011                                 LERPBYTE( 2);
1012                                 LERPBYTE( 3);
1013                                 out += 4;
1014                                 resamplerow1 += 4;
1015                                 resamplerow2 += 4;
1016                         }
1017                         resamplerow1 -= outwidth4;
1018                         resamplerow2 -= outwidth4;
1019                 }
1020                 else
1021                 {
1022                         if (yi != oldy)
1023                         {
1024                                 inrow = (qbyte *)indata + inwidth4*yi;
1025                                 if (yi == oldy+1)
1026                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1027                                 else
1028                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1029                                 oldy = yi;
1030                         }
1031                         memcpy(out, resamplerow1, outwidth4);
1032                 }
1033         }
1034 }
1035
1036 void Image_Resample32Nearest(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1037 {
1038         int i, j;
1039         unsigned frac, fracstep;
1040         // relies on int being 4 bytes
1041         int *inrow, *out;
1042         out = outdata;
1043
1044         fracstep = inwidth*0x10000/outwidth;
1045         for (i = 0;i < outheight;i++)
1046         {
1047                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1048                 frac = fracstep >> 1;
1049                 j = outwidth - 4;
1050                 while (j >= 0)
1051                 {
1052                         out[0] = inrow[frac >> 16];frac += fracstep;
1053                         out[1] = inrow[frac >> 16];frac += fracstep;
1054                         out[2] = inrow[frac >> 16];frac += fracstep;
1055                         out[3] = inrow[frac >> 16];frac += fracstep;
1056                         out += 4;
1057                         j -= 4;
1058                 }
1059                 if (j & 2)
1060                 {
1061                         out[0] = inrow[frac >> 16];frac += fracstep;
1062                         out[1] = inrow[frac >> 16];frac += fracstep;
1063                         out += 2;
1064                 }
1065                 if (j & 1)
1066                 {
1067                         out[0] = inrow[frac >> 16];frac += fracstep;
1068                         out += 1;
1069                 }
1070         }
1071 }
1072
1073 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1074 {
1075         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1076         qbyte *out;
1077         const qbyte *inrow;
1078         out = outdata;
1079         fstep = (int) (inheight*65536.0f/outheight);
1080
1081         inrow = indata;
1082         oldy = 0;
1083         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1084         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1085         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1086         {
1087                 yi = f >> 16;
1088                 if (yi < endy)
1089                 {
1090                         lerp = f & 0xFFFF;
1091                         if (yi != oldy)
1092                         {
1093                                 inrow = (qbyte *)indata + inwidth3*yi;
1094                                 if (yi == oldy+1)
1095                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1096                                 else
1097                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1098                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1099                                 oldy = yi;
1100                         }
1101                         j = outwidth - 4;
1102                         while(j >= 0)
1103                         {
1104                                 LERPBYTE( 0);
1105                                 LERPBYTE( 1);
1106                                 LERPBYTE( 2);
1107                                 LERPBYTE( 3);
1108                                 LERPBYTE( 4);
1109                                 LERPBYTE( 5);
1110                                 LERPBYTE( 6);
1111                                 LERPBYTE( 7);
1112                                 LERPBYTE( 8);
1113                                 LERPBYTE( 9);
1114                                 LERPBYTE(10);
1115                                 LERPBYTE(11);
1116                                 out += 12;
1117                                 resamplerow1 += 12;
1118                                 resamplerow2 += 12;
1119                                 j -= 4;
1120                         }
1121                         if (j & 2)
1122                         {
1123                                 LERPBYTE( 0);
1124                                 LERPBYTE( 1);
1125                                 LERPBYTE( 2);
1126                                 LERPBYTE( 3);
1127                                 LERPBYTE( 4);
1128                                 LERPBYTE( 5);
1129                                 out += 6;
1130                                 resamplerow1 += 6;
1131                                 resamplerow2 += 6;
1132                         }
1133                         if (j & 1)
1134                         {
1135                                 LERPBYTE( 0);
1136                                 LERPBYTE( 1);
1137                                 LERPBYTE( 2);
1138                                 out += 3;
1139                                 resamplerow1 += 3;
1140                                 resamplerow2 += 3;
1141                         }
1142                         resamplerow1 -= outwidth3;
1143                         resamplerow2 -= outwidth3;
1144                 }
1145                 else
1146                 {
1147                         if (yi != oldy)
1148                         {
1149                                 inrow = (qbyte *)indata + inwidth3*yi;
1150                                 if (yi == oldy+1)
1151                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1152                                 else
1153                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1154                                 oldy = yi;
1155                         }
1156                         memcpy(out, resamplerow1, outwidth3);
1157                 }
1158         }
1159 }
1160
1161 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1162 {
1163         int i, j, f, inwidth3 = inwidth * 3;
1164         unsigned frac, fracstep;
1165         qbyte *inrow, *out;
1166         out = outdata;
1167
1168         fracstep = inwidth*0x10000/outwidth;
1169         for (i = 0;i < outheight;i++)
1170         {
1171                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1172                 frac = fracstep >> 1;
1173                 j = outwidth - 4;
1174                 while (j >= 0)
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                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1179                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1180                         j -= 4;
1181                 }
1182                 if (j & 2)
1183                 {
1184                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1185                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1186                         out += 2;
1187                 }
1188                 if (j & 1)
1189                 {
1190                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1191                         out += 1;
1192                 }
1193         }
1194 }
1195
1196 /*
1197 ================
1198 Image_Resample
1199 ================
1200 */
1201 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1202 {
1203         if (indepth != 1 || outdepth != 1)
1204                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1205         if (resamplerowsize < outwidth*4)
1206         {
1207                 if (resamplerow1)
1208                         Mem_Free(resamplerow1);
1209                 resamplerowsize = outwidth*4;
1210                 if (!resamplemempool)
1211                         resamplemempool = Mem_AllocPool("Image Scaling Buffer");
1212                 resamplerow1 = Mem_Alloc(resamplemempool, resamplerowsize*2);
1213                 resamplerow2 = resamplerow1 + resamplerowsize;
1214         }
1215         if (bytesperpixel == 4)
1216         {
1217                 if (quality)
1218                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1219                 else
1220                         Image_Resample32Nearest(indata, inwidth, inheight, outdata, outwidth, outheight);
1221         }
1222         else if (bytesperpixel == 3)
1223         {
1224                 if (quality)
1225                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1226                 else
1227                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1228         }
1229         else
1230                 Sys_Error("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1231 }
1232
1233 // in can be the same as out
1234 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1235 {
1236         int x, y, nextrow;
1237         if (*depth != 1 || destdepth != 1)
1238                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1239         nextrow = *width * bytesperpixel;
1240         if (*width > destwidth)
1241         {
1242                 *width >>= 1;
1243                 if (*height > destheight)
1244                 {
1245                         // reduce both
1246                         *height >>= 1;
1247                         if (bytesperpixel == 4)
1248                         {
1249                                 for (y = 0;y < *height;y++)
1250                                 {
1251                                         for (x = 0;x < *width;x++)
1252                                         {
1253                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1254                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1255                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1256                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1257                                                 out += 4;
1258                                                 in += 8;
1259                                         }
1260                                         in += nextrow; // skip a line
1261                                 }
1262                         }
1263                         else if (bytesperpixel == 3)
1264                         {
1265                                 for (y = 0;y < *height;y++)
1266                                 {
1267                                         for (x = 0;x < *width;x++)
1268                                         {
1269                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1270                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1271                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1272                                                 out += 3;
1273                                                 in += 6;
1274                                         }
1275                                         in += nextrow; // skip a line
1276                                 }
1277                         }
1278                         else
1279                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1280                 }
1281                 else
1282                 {
1283                         // reduce width
1284                         if (bytesperpixel == 4)
1285                         {
1286                                 for (y = 0;y < *height;y++)
1287                                 {
1288                                         for (x = 0;x < *width;x++)
1289                                         {
1290                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1291                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1292                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1293                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1294                                                 out += 4;
1295                                                 in += 8;
1296                                         }
1297                                 }
1298                         }
1299                         else if (bytesperpixel == 3)
1300                         {
1301                                 for (y = 0;y < *height;y++)
1302                                 {
1303                                         for (x = 0;x < *width;x++)
1304                                         {
1305                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1306                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1307                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1308                                                 out += 3;
1309                                                 in += 6;
1310                                         }
1311                                 }
1312                         }
1313                         else
1314                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1315                 }
1316         }
1317         else
1318         {
1319                 if (*height > destheight)
1320                 {
1321                         // reduce height
1322                         *height >>= 1;
1323                         if (bytesperpixel == 4)
1324                         {
1325                                 for (y = 0;y < *height;y++)
1326                                 {
1327                                         for (x = 0;x < *width;x++)
1328                                         {
1329                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1330                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1331                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1332                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1333                                                 out += 4;
1334                                                 in += 4;
1335                                         }
1336                                         in += nextrow; // skip a line
1337                                 }
1338                         }
1339                         else if (bytesperpixel == 3)
1340                         {
1341                                 for (y = 0;y < *height;y++)
1342                                 {
1343                                         for (x = 0;x < *width;x++)
1344                                         {
1345                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1346                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1347                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1348                                                 out += 3;
1349                                                 in += 3;
1350                                         }
1351                                         in += nextrow; // skip a line
1352                                 }
1353                         }
1354                         else
1355                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1356                 }
1357                 else
1358                         Sys_Error("Image_MipReduce: desired size already achieved\n");
1359         }
1360 }
1361
1362 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1363 {
1364         int x, y;
1365         const unsigned char *p0, *p1, *p2;
1366         unsigned char *out;
1367         float iwidth, iheight, ibumpscale, n[3];
1368         iwidth = 1.0f / width;
1369         iheight = 1.0f / height;
1370         ibumpscale = (255.0f * 3.0f) / bumpscale;
1371         out = outpixels;
1372         for (y = 0;y < height;y++)
1373         {
1374                 for (x = 0;x < width;x++)
1375                 {
1376                         p0 = inpixels + (y * width + x) * 4;
1377                         if (x == width - 1)
1378                         {
1379                                 if (clamp)
1380                                         p1 = inpixels + (y * width + x) * 4;
1381                                 else
1382                                         p1 = inpixels + (y * width) * 4;
1383                         }
1384                         else
1385                                 p1 = inpixels + (y * width + x + 1) * 4;
1386                         if (y == height - 1)
1387                         {
1388                                 if (clamp)
1389                                         p2 = inpixels + (y * width + x) * 4;
1390                                 else
1391                                         p2 = inpixels + x * 4;
1392                         }
1393                         else
1394                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1395                         /*
1396                         dv[0][0] = iwidth;
1397                         dv[0][1] = 0;
1398                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1399                         dv[1][0] = 0;
1400                         dv[1][1] = iheight;
1401                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1402                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1403                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1404                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1405                         */
1406                         n[0] = ((p1[0] + p1[1] + p1[2]) - (p0[0] + p0[1] + p0[2]));
1407                         n[1] = ((p0[0] + p0[1] + p0[2]) - (p2[0] + p2[1] + p2[2]));
1408                         n[2] = ibumpscale;
1409                         VectorNormalize(n);
1410                         /*
1411                         // this should work for the bottom right triangle if anyone wants
1412                         // code for that for some reason
1413                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1414                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1415                         n[2] = ibumpscale;
1416                         VectorNormalize(n);
1417                         */
1418                         out[0] = 128.0f + n[0] * 127.0f;
1419                         out[1] = 128.0f + n[1] * 127.0f;
1420                         out[2] = 128.0f + n[2] * 127.0f;
1421                         out[3] = 255;
1422                         out += 4;
1423                 }
1424         }
1425 }
1426
1427 int image_loadskin(imageskin_t *s, char *shadername)
1428 {
1429         int j;
1430         qbyte *bumppixels;
1431         int bumppixels_width, bumppixels_height;
1432         char name[MAX_QPATH];
1433         Image_StripImageExtension(shadername, name);
1434         memset(s, 0, sizeof(*s));
1435         s->basepixels = loadimagepixels(name, false, 0, 0);
1436         if (s->basepixels == NULL)
1437                 return false;
1438         s->basepixels_width = image_width;
1439         s->basepixels_height = image_height;
1440
1441         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1442         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1443         {
1444                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1445                 s->maskpixels_width = s->basepixels_width;
1446                 s->maskpixels_height = s->basepixels_height;
1447                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1448                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1449                 {
1450                         s->maskpixels[j+0] = 255;
1451                         s->maskpixels[j+1] = 255;
1452                         s->maskpixels[j+2] = 255;
1453                 }
1454         }
1455
1456         // _luma is supported for tenebrae compatibility
1457         // (I think it's a very stupid name, but oh well)
1458         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1459          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1460         {
1461                 s->glowpixels_width = image_width;
1462                 s->glowpixels_height = image_height;
1463         }
1464         // _norm is the name used by tenebrae
1465         // (I don't like the name much)
1466         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1467         {
1468                 s->nmappixels_width = image_width;
1469                 s->nmappixels_height = image_height;
1470         }
1471         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1472         {
1473                 bumppixels_width = image_width;
1474                 bumppixels_height = image_height;
1475         }
1476         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1477         {
1478                 s->glosspixels_width = image_width;
1479                 s->glosspixels_height = image_height;
1480         }
1481         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1482         {
1483                 s->pantspixels_width = image_width;
1484                 s->pantspixels_height = image_height;
1485         }
1486         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1487         {
1488                 s->shirtpixels_width = image_width;
1489                 s->shirtpixels_height = image_height;
1490         }
1491
1492         if (s->nmappixels == NULL)
1493         {
1494                 if (bumppixels != NULL)
1495                 {
1496                         if (r_shadow_bumpscale_bumpmap.value > 0)
1497                         {
1498                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1499                                 s->nmappixels_width = bumppixels_width;
1500                                 s->nmappixels_height = bumppixels_height;
1501                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1502                         }
1503                 }
1504                 else
1505                 {
1506                         if (r_shadow_bumpscale_basetexture.value > 0)
1507                         {
1508                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1509                                 s->nmappixels_width = s->basepixels_width;
1510                                 s->nmappixels_height = s->basepixels_height;
1511                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1512                         }
1513                 }
1514         }
1515         if (bumppixels != NULL)
1516                 Mem_Free(bumppixels);
1517         return true;
1518 }
1519
1520 void image_freeskin(imageskin_t *s)
1521 {
1522         if (s->basepixels)
1523                 Mem_Free(s->basepixels);
1524         if (s->maskpixels)
1525                 Mem_Free(s->maskpixels);
1526         if (s->nmappixels)
1527                 Mem_Free(s->nmappixels);
1528         if (s->glowpixels)
1529                 Mem_Free(s->glowpixels);
1530         if (s->glosspixels)
1531                 Mem_Free(s->glosspixels);
1532         if (s->pantspixels)
1533                 Mem_Free(s->pantspixels);
1534         if (s->shirtpixels)
1535                 Mem_Free(s->shirtpixels);
1536         memset(s, 0, sizeof(*s));
1537 }
1538