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 #if 1
  11 // written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
  12 void Image_CopyMux(qbyte *outpixels, const qbyte *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  13 {
  14         int index, c, x, y;
  15         const qbyte *in, *line;
  16         int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
  17         int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);
  18
  19         for (c = 0; c < numoutputcomponents; c++)
  20                 if (outputinputcomponentindices[c] & 0x80000000)
  21                         break;
  22         if (c < numoutputcomponents)
  23         {
  24                 // special indices used
  25                 if (inputflipdiagonal)
  26                 {
  27                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  28                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
  29                                         for (c = 0; c < numoutputcomponents; c++)
  30                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  31                 }
  32                 else
  33                 {
  34                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  35                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
  36                                         for (c = 0; c < numoutputcomponents; c++)
  37                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  38                 }
  39         }
  40         else
  41         {
  42                 // special indices not used
  43                 if (inputflipdiagonal)
  44                 {
  45                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  46                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
  47                                         for (c = 0; c < numoutputcomponents; c++)
  48                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  49                 }
  50                 else
  51                 {
  52                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  53                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
  54                                         for (c = 0; c < numoutputcomponents; c++)
  55                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  56                 }
  57         }
  58 }
  59 #else
  60 // intentionally readable version
  61 void Image_CopyMux(qbyte *outpixels, const qbyte *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  62 {
  63         int index, c, x, y;
  64         const qbyte *in, *inrow, *incolumn;
  65         if (inputflipdiagonal)
  66         {
  67                 for (x = 0;x < inputwidth;x++)
  68                 {
  69                         for (y = 0;y < inputheight;y++)
  70                         {
  71                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  72                                 for (c = 0;c < numoutputcomponents;c++)
  73                                 {
  74                                         index = outputinputcomponentindices[c];
  75                                         if (index & 0x80000000)
  76                                                 *outpixels++ = index;
  77                                         else
  78                                                 *outpixels++ = in[index];
  79                                 }
  80                         }
  81                 }
  82         }
  83         else
  84         {
  85                 for (y = 0;y < inputheight;y++)
  86                 {
  87                         for (x = 0;x < inputwidth;x++)
  88                         {
  89                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  90                                 for (c = 0;c < numoutputcomponents;c++)
  91                                 {
  92                                         index = outputinputcomponentindices[c];
  93                                         if (index & 0x80000000)
  94                                                 *outpixels++ = index;
  95                                         else
  96                                                 *outpixels++ = in[index];
  97                                 }
  98                         }
  99                 }
 100         }
 101 }
 102 #endif
 103
 104 void Image_GammaRemapRGB(const qbyte *in, qbyte *out, int pixels, const qbyte *gammar, const qbyte *gammag, const qbyte *gammab)
 105 {
 106         while (pixels--)
 107         {
 108                 out[0] = gammar[in[0]];
 109                 out[1] = gammag[in[1]];
 110                 out[2] = gammab[in[2]];
 111                 in += 3;
 112                 out += 3;
 113         }
 114 }
 115
 116 // note: pal must be 32bit color
 117 void Image_Copy8bitRGBA(const qbyte *in, qbyte *out, int pixels, const unsigned int *pal)
 118 {
 119         int *iout = (void *)out;
 120         while (pixels >= 8)
 121         {
 122                 iout[0] = pal[in[0]];
 123                 iout[1] = pal[in[1]];
 124                 iout[2] = pal[in[2]];
 125                 iout[3] = pal[in[3]];
 126                 iout[4] = pal[in[4]];
 127                 iout[5] = pal[in[5]];
 128                 iout[6] = pal[in[6]];
 129                 iout[7] = pal[in[7]];
 130                 in += 8;
 131                 iout += 8;
 132                 pixels -= 8;
 133         }
 134         if (pixels & 4)
 135         {
 136                 iout[0] = pal[in[0]];
 137                 iout[1] = pal[in[1]];
 138                 iout[2] = pal[in[2]];
 139                 iout[3] = pal[in[3]];
 140                 in += 4;
 141                 iout += 4;
 142         }
 143         if (pixels & 2)
 144         {
 145                 iout[0] = pal[in[0]];
 146                 iout[1] = pal[in[1]];
 147                 in += 2;
 148                 iout += 2;
 149         }
 150         if (pixels & 1)
 151                 iout[0] = pal[in[0]];
 152 }
 153
 154 /*
 155 =================================================================
 156
 157   PCX Loading
 158
 159 =================================================================
 160 */
 161
 162 typedef struct
 163 {
 164     char        manufacturer;
 165     char        version;
 166     char        encoding;
 167     char        bits_per_pixel;
 168     unsigned short      xmin,ymin,xmax,ymax;
 169     unsigned short      hres,vres;
 170     unsigned char       palette[48];
 171     char        reserved;
 172     char        color_planes;
 173     unsigned short      bytes_per_line;
 174     unsigned short      palette_type;
 175     char        filler[58];
 176 } pcx_t;
 177
 178 /*
 179 ============
 180 LoadPCX
 181 ============
 182 */
 183 qbyte* LoadPCX (const qbyte *f, int matchwidth, int matchheight)
 184 {
 185         pcx_t pcx;
 186         qbyte *a, *b, *image_rgba, *pbuf;
 187         const qbyte *palette, *fin, *enddata;
 188         int x, y, x2, dataByte;
 189
 190         if (fs_filesize < (int)sizeof(pcx) + 768)
 191         {
 192                 Con_Print("Bad pcx file\n");
 193                 return NULL;
 194         }
 195
 196         fin = f;
 197
 198         memcpy(&pcx, fin, sizeof(pcx));
 199         fin += sizeof(pcx);
 200
 201         // LordHavoc: big-endian support ported from QF newtree
 202         pcx.xmax = LittleShort (pcx.xmax);
 203         pcx.xmin = LittleShort (pcx.xmin);
 204         pcx.ymax = LittleShort (pcx.ymax);
 205         pcx.ymin = LittleShort (pcx.ymin);
 206         pcx.hres = LittleShort (pcx.hres);
 207         pcx.vres = LittleShort (pcx.vres);
 208         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 209         pcx.palette_type = LittleShort (pcx.palette_type);
 210
 211         image_width = pcx.xmax + 1 - pcx.xmin;
 212         image_height = pcx.ymax + 1 - pcx.ymin;
 213         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)
 214         {
 215                 Con_Print("Bad pcx file\n");
 216                 return NULL;
 217         }
 218         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 219                 return NULL;
 220
 221         palette = f + fs_filesize - 768;
 222
 223         image_rgba = Mem_Alloc(tempmempool, image_width*image_height*4);
 224         if (!image_rgba)
 225         {
 226                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 227                 return NULL;
 228         }
 229         pbuf = image_rgba + image_width*image_height*3;
 230         enddata = palette;
 231
 232         for (y = 0;y < image_height && fin < enddata;y++)
 233         {
 234                 a = pbuf + y * image_width;
 235                 for (x = 0;x < image_width && fin < enddata;)
 236                 {
 237                         dataByte = *fin++;
 238                         if(dataByte >= 0xC0)
 239                         {
 240                                 if (fin >= enddata)
 241                                         break;
 242                                 x2 = x + (dataByte & 0x3F);
 243                                 dataByte = *fin++;
 244                                 if (x2 > image_width)
 245                                         x2 = image_width; // technically an error
 246                                 while(x < x2)
 247                                         a[x++] = dataByte;
 248                         }
 249                         else
 250                                 a[x++] = dataByte;
 251                 }
 252                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
 253                 while(x < image_width)
 254                         a[x++] = 0;
 255         }
 256
 257         a = image_rgba;
 258         b = pbuf;
 259
 260         for(x = 0;x < image_width*image_height;x++)
 261         {
 262                 y = *b++ * 3;
 263                 *a++ = palette[y];
 264                 *a++ = palette[y+1];
 265                 *a++ = palette[y+2];
 266                 *a++ = 255;
 267         }
 268
 269         return image_rgba;
 270 }
 271
 272 /*
 273 =========================================================
 274
 275 TARGA LOADING
 276
 277 =========================================================
 278 */
 279
 280 typedef struct _TargaHeader
 281 {
 282         unsigned char   id_length, colormap_type, image_type;
 283         unsigned short  colormap_index, colormap_length;
 284         unsigned char   colormap_size;
 285         unsigned short  x_origin, y_origin, width, height;
 286         unsigned char   pixel_size, attributes;
 287 }
 288 TargaHeader;
 289
 290 void PrintTargaHeader(TargaHeader *t)
 291 {
 292         Con_Print("TargaHeader:\n");
 293         Con_Printf("uint8 id_length = %i;\n", t->id_length);
 294         Con_Printf("uint8 colormap_type = %i;\n", t->colormap_type);
 295         Con_Printf("uint8 image_type = %i;\n", t->image_type);
 296         Con_Printf("uint16 colormap_index = %i;\n", t->colormap_index);
 297         Con_Printf("uint16 colormap_length = %i;\n", t->colormap_length);
 298         Con_Printf("uint8 colormap_size = %i;\n", t->colormap_size);
 299         Con_Printf("uint16 x_origin = %i;\n", t->x_origin);
 300         Con_Printf("uint16 y_origin = %i;\n", t->y_origin);
 301         Con_Printf("uint16 width = %i;\n", t->width);
 302         Con_Printf("uint16 height = %i;\n", t->height);
 303         Con_Printf("uint8 pixel_size = %i;\n", t->pixel_size);
 304         Con_Printf("uint8 attributes = %i;\n", t->attributes);
 305 }
 306
 307 /*
 308 =============
 309 LoadTGA
 310 =============
 311 */
 312 qbyte *LoadTGA (const qbyte *f, int matchwidth, int matchheight)
 313 {
 314         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex, alphabits;
 315         qbyte *pixbuf, *image_rgba;
 316         const qbyte *fin, *enddata;
 317         TargaHeader targa_header;
 318         unsigned char palette[256*4], *p;
 319
 320         if (fs_filesize < 19)
 321                 return NULL;
 322
 323         enddata = f + fs_filesize;
 324
 325         targa_header.id_length = f[0];
 326         targa_header.colormap_type = f[1];
 327         targa_header.image_type = f[2];
 328
 329         targa_header.colormap_index = f[3] + f[4] * 256;
 330         targa_header.colormap_length = f[5] + f[6] * 256;
 331         targa_header.colormap_size = f[7];
 332         targa_header.x_origin = f[8] + f[9] * 256;
 333         targa_header.y_origin = f[10] + f[11] * 256;
 334         targa_header.width = image_width = f[12] + f[13] * 256;
 335         targa_header.height = image_height = f[14] + f[15] * 256;
 336         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 337         {
 338                 Con_Print("LoadTGA: invalid size\n");
 339                 PrintTargaHeader(&targa_header);
 340                 return NULL;
 341         }
 342         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 343                 return NULL;
 344         targa_header.pixel_size = f[16];
 345         targa_header.attributes = f[17];
 346
 347         // advance to end of header
 348         fin = f + 18;
 349
 350         // skip TARGA image comment (usually 0 bytes)
 351         fin += targa_header.id_length;
 352
 353         // read/skip the colormap if present (note: according to the TARGA spec it
 354         // can be present even on truecolor or greyscale images, just not used by
 355         // the image data)
 356         if (targa_header.colormap_type)
 357         {
 358                 if (targa_header.colormap_length > 256)
 359                 {
 360                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 361                         PrintTargaHeader(&targa_header);
 362                         return NULL;
 363                 }
 364                 if (targa_header.colormap_index)
 365                 {
 366                         Con_Print("LoadTGA: colormap_index not supported\n");
 367                         PrintTargaHeader(&targa_header);
 368                         return NULL;
 369                 }
 370                 if (targa_header.colormap_size == 24)
 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] = 255;
 378                         }
 379                 }
 380                 else if (targa_header.colormap_size == 32)
 381                 {
 382                         for (x = 0;x < targa_header.colormap_length;x++)
 383                         {
 384                                 palette[x*4+2] = *fin++;
 385                                 palette[x*4+1] = *fin++;
 386                                 palette[x*4+0] = *fin++;
 387                                 palette[x*4+3] = *fin++;
 388                         }
 389                 }
 390                 else
 391                 {
 392                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 393                         PrintTargaHeader(&targa_header);
 394                         return NULL;
 395                 }
 396         }
 397
 398         // check our pixel_size restrictions according to image_type
 399         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 400         {
 401                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 402                 {
 403                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 404                         PrintTargaHeader(&targa_header);
 405                         return NULL;
 406                 }
 407         }
 408         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 409         {
 410                 if (targa_header.pixel_size != 8)
 411                 {
 412                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 413                         PrintTargaHeader(&targa_header);
 414                         return NULL;
 415                 }
 416         }
 417         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
 418         {
 419                 if (targa_header.pixel_size != 8)
 420                 {
 421                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 422                         PrintTargaHeader(&targa_header);
 423                         return NULL;
 424                 }
 425         }
 426         else
 427         {
 428                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 429                 PrintTargaHeader(&targa_header);
 430                 return NULL;
 431         }
 432
 433         if (targa_header.attributes & 0x10)
 434         {
 435                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 436                 return NULL;
 437         }
 438
 439         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 440         if (!image_rgba)
 441         {
 442                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 443                 return NULL;
 444         }
 445
 446         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 447         if ((targa_header.attributes & 0x20) == 0)
 448         {
 449                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 450                 row_inc = -image_width*4*2;
 451         }
 452         else
 453         {
 454                 pixbuf = image_rgba;
 455                 row_inc = 0;
 456         }
 457
 458         // number of attribute bits per pixel, we only support 0 or 8
 459         alphabits = targa_header.attributes & 0x0F;
 460         if (alphabits != 8 && alphabits != 0)
 461         {
 462                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
 463                 return NULL;
 464         }
 465
 466         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 467         x = 0;
 468         y = 0;
 469         red = green = blue = alpha = 255;
 470         while (y < image_height)
 471         {
 472                 // decoder is mostly the same whether it's compressed or not
 473                 readpixelcount = 1000000;
 474                 runlen = 1000000;
 475                 if (compressed && fin < enddata)
 476                 {
 477                         runlen = *fin++;
 478                         // high bit indicates this is an RLE compressed run
 479                         if (runlen & 0x80)
 480                                 readpixelcount = 1;
 481                         runlen = 1 + (runlen & 0x7f);
 482                 }
 483
 484                 while((runlen--) && y < image_height)
 485                 {
 486                         if (readpixelcount > 0)
 487                         {
 488                                 readpixelcount--;
 489                                 red = green = blue = alpha = 255;
 490                                 if (fin < enddata)
 491                                 {
 492                                         switch(targa_header.image_type)
 493                                         {
 494                                         case 1:
 495                                         case 9:
 496                                                 // colormapped
 497                                                 pindex = *fin++;
 498                                                 if (pindex >= targa_header.colormap_length)
 499                                                         pindex = 0; // error
 500                                                 p = palette + pindex * 4;
 501                                                 red = p[0];
 502                                                 green = p[1];
 503                                                 blue = p[2];
 504                                                 alpha = p[3];
 505                                                 break;
 506                                         case 2:
 507                                         case 10:
 508                                                 // BGR or BGRA
 509                                                 blue = *fin++;
 510                                                 if (fin < enddata)
 511                                                         green = *fin++;
 512                                                 if (fin < enddata)
 513                                                         red = *fin++;
 514                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 515                                                         alpha = *fin++;
 516                                                 break;
 517                                         case 3:
 518                                         case 11:
 519                                                 // greyscale
 520                                                 red = green = blue = *fin++;
 521                                                 break;
 522                                         }
 523                                         if (!alphabits)
 524                                                 alpha = 255;
 525                                 }
 526                         }
 527                         *pixbuf++ = red;
 528                         *pixbuf++ = green;
 529                         *pixbuf++ = blue;
 530                         *pixbuf++ = alpha;
 531                         x++;
 532                         if (x == image_width)
 533                         {
 534                                 // end of line, advance to next
 535                                 x = 0;
 536                                 y++;
 537                                 pixbuf += row_inc;
 538                         }
 539                 }
 540         }
 541
 542         return image_rgba;
 543 }
 544
 545 /*
 546 ============
 547 LoadLMP
 548 ============
 549 */
 550 qbyte *LoadLMP (const qbyte *f, int matchwidth, int matchheight, qboolean loadAs8Bit)
 551 {
 552         qbyte *image_buffer;
 553
 554         if (fs_filesize < 9)
 555         {
 556                 Con_Print("LoadLMP: invalid LMP file\n");
 557                 return NULL;
 558         }
 559
 560         // parse the very complicated header *chuckle*
 561         image_width = BuffLittleLong(f);
 562         image_height = BuffLittleLong(f + 4);
 563         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 564         {
 565                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
 566                 return NULL;
 567         }
 568         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 569                 return NULL;
 570
 571         if (fs_filesize < 8 + image_width * image_height)
 572         {
 573                 Con_Print("LoadLMP: invalid LMP file\n");
 574                 return NULL;
 575         }
 576
 577         if (loadAs8Bit)
 578         {
 579                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height);
 580                 memcpy(image_buffer, f + 8, image_width * image_height);
 581         }
 582         else
 583         {
 584                 image_buffer = Mem_Alloc(tempmempool, image_width * image_height * 4);
 585                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_complete);
 586         }
 587         return image_buffer;
 588 }
 589
 590 static qbyte *LoadLMPRGBA (const qbyte *f, int matchwidth, int matchheight)
 591 {
 592         return LoadLMP(f, matchwidth, matchheight, false);
 593 }
 594
 595
 596 typedef struct
 597 {
 598         char            name[32];
 599         unsigned        width, height;
 600         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 601         char            animname[32];                   // next frame in animation chain
 602         int                     flags;
 603         int                     contents;
 604         int                     value;
 605 } q2wal_t;
 606
 607 qbyte *LoadWAL (const qbyte *f, int matchwidth, int matchheight)
 608 {
 609         qbyte *image_rgba;
 610         const q2wal_t *inwal = (const void *)f;
 611
 612         if (fs_filesize < (int) sizeof(q2wal_t))
 613         {
 614                 Con_Print("LoadWAL: invalid WAL file\n");
 615                 return NULL;
 616         }
 617
 618         image_width = LittleLong(inwal->width);
 619         image_height = LittleLong(inwal->height);
 620         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
 621         {
 622                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 623                 return NULL;
 624         }
 625         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
 626                 return NULL;
 627
 628         if ((int) fs_filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 629         {
 630                 Con_Print("LoadWAL: invalid WAL file\n");
 631                 return NULL;
 632         }
 633
 634         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 635         if (!image_rgba)
 636         {
 637                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 638                 return NULL;
 639         }
 640         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
 641         return image_rgba;
 642 }
 643
 644
 645 void Image_StripImageExtension (const char *in, char *out)
 646 {
 647         const char *end, *temp;
 648         end = in + strlen(in);
 649         if ((end - in) >= 4)
 650         {
 651                 temp = end - 4;
 652                 if (strcmp(temp, ".tga") == 0
 653                  || strcmp(temp, ".pcx") == 0
 654                  || strcmp(temp, ".lmp") == 0
 655                  || strcmp(temp, ".png") == 0
 656                  || strcmp(temp, ".jpg") == 0)
 657                         end = temp;
 658                 while (in < end)
 659                         *out++ = *in++;
 660                 *out++ = 0;
 661         }
 662         else
 663                 strcpy(out, in);
 664 }
 665
 666 struct
 667 {
 668         const char *formatstring;
 669         qbyte *(*loadfunc)(const qbyte *f, int matchwidth, int matchheight);
 670 }
 671 imageformats[] =
 672 {
 673         {"override/%s.tga", LoadTGA},
 674         {"override/%s.jpg", JPEG_LoadImage},
 675         {"textures/%s.tga", LoadTGA},
 676         {"textures/%s.jpg", JPEG_LoadImage},
 677         {"textures/%s.pcx", LoadPCX},
 678         {"textures/%s.wal", LoadWAL},
 679         {"%s.tga", LoadTGA},
 680         {"%s.jpg", JPEG_LoadImage},
 681         {"%s.pcx", LoadPCX},
 682         {"%s.lmp", LoadLMPRGBA},
 683         {NULL, NULL}
 684 };
 685
 686 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 687 {
 688         int i;
 689         qbyte *f, *data = NULL;
 690         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 691         if (developer_memorydebug.integer)
 692                 Mem_CheckSentinelsGlobal();
 693         if (developer_texturelogging.integer)
 694                 Log_Printf("textures.log", "%s\n", filename);
 695         Image_StripImageExtension(filename, basename); // strip filename extensions to allow replacement by other types
 696         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 697         for (c = basename;*c;c++)
 698                 if (*c == '*')
 699                         *c = '#';
 700         for (i = 0;imageformats[i].formatstring;i++)
 701         {
 702                 sprintf (name, imageformats[i].formatstring, basename);
 703                 f = FS_LoadFile(name, tempmempool, true);
 704                 if (f)
 705                 {
 706                         data = imageformats[i].loadfunc(f, matchwidth, matchheight);
 707                         Mem_Free(f);
 708                         if (data)
 709                         {
 710                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
 711                                 if (developer_memorydebug.integer)
 712                                         Mem_CheckSentinelsGlobal();
 713                                 return data;
 714                         }
 715                 }
 716         }
 717         if (complain)
 718         {
 719                 Con_Printf("Couldn't load %s using ", filename);
 720                 for (i = 0;imageformats[i].formatstring;i++)
 721                 {
 722                         sprintf (name, imageformats[i].formatstring, basename);
 723                         Con_Printf(i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
 724                 }
 725         }
 726         if (developer_memorydebug.integer)
 727                 Mem_CheckSentinelsGlobal();
 728         return NULL;
 729 }
 730
 731 int image_makemask (const qbyte *in, qbyte *out, int size)
 732 {
 733         int i, count;
 734         count = 0;
 735         for (i = 0;i < size;i++)
 736         {
 737                 out[0] = out[1] = out[2] = 255;
 738                 out[3] = in[3];
 739                 if (in[3] != 255)
 740                         count++;
 741                 in += 4;
 742                 out += 4;
 743         }
 744         return count;
 745 }
 746
 747 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 748 {
 749         qbyte *in, *data;
 750         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 751         if (!data)
 752                 return NULL;
 753         if (image_makemask(data, data, image_width * image_height))
 754                 return data; // some transparency
 755         else
 756         {
 757                 Mem_Free(data);
 758                 return NULL; // all opaque
 759         }
 760 }
 761
 762 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 763 {
 764         qbyte *data;
 765         rtexture_t *rt;
 766         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 767                 return 0;
 768         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 769         Mem_Free(data);
 770         return rt;
 771 }
 772
 773 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 774 {
 775         qbyte *data;
 776         rtexture_t *rt;
 777         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
 778                 return 0;
 779         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 780         Mem_Free(data);
 781         return rt;
 782 }
 783
 784 rtexture_t *image_masktex;
 785 rtexture_t *image_nmaptex;
 786 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 787 {
 788         qbyte *data;
 789         rtexture_t *rt;
 790         image_masktex = NULL;
 791         image_nmaptex = NULL;
 792         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 793                 return 0;
 794
 795         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 796
 797         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 798                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 799
 800         Mem_Free(data);
 801         return rt;
 802 }
 803
 804 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 805 {
 806         qbyte *data, *data2;
 807         rtexture_t *rt;
 808         image_masktex = NULL;
 809         image_nmaptex = NULL;
 810         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 811                 return 0;
 812
 813         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 814
 815         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 816
 817         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 818         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 819
 820         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 821                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 822
 823         Mem_Free(data2);
 824
 825         Mem_Free(data);
 826         return rt;
 827 }
 828
 829 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 830 {
 831         qbyte *data, *data2;
 832         rtexture_t *rt;
 833         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 834                 return 0;
 835         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 836
 837         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 838         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 839
 840         Mem_Free(data2);
 841         Mem_Free(data);
 842         return rt;
 843 }
 844
 845 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data, qbyte *buffer)
 846 {
 847         qboolean ret;
 848         qbyte *out;
 849         const qbyte *in, *end;
 850
 851         memset (buffer, 0, 18);
 852         buffer[2] = 2;          // uncompressed type
 853         buffer[12] = (width >> 0) & 0xFF;
 854         buffer[13] = (width >> 8) & 0xFF;
 855         buffer[14] = (height >> 0) & 0xFF;
 856         buffer[15] = (height >> 8) & 0xFF;
 857         buffer[16] = 24;        // pixel size
 858
 859         // swap rgb to bgr
 860         in = data;
 861         out = buffer + 18;
 862         end = in + width*height*3;
 863         for (;in < end;in += 3)
 864         {
 865                 *out++ = in[2];
 866                 *out++ = in[1];
 867                 *out++ = in[0];
 868         }
 869         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
 870
 871         return ret;
 872 }
 873
 874 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
 875 {
 876         int y;
 877         qbyte *buffer, *out;
 878         const qbyte *in, *end;
 879
 880         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 881
 882         memset (buffer, 0, 18);
 883         buffer[2] = 2;          // uncompressed type
 884         buffer[12] = (width >> 0) & 0xFF;
 885         buffer[13] = (width >> 8) & 0xFF;
 886         buffer[14] = (height >> 0) & 0xFF;
 887         buffer[15] = (height >> 8) & 0xFF;
 888         buffer[16] = 24;        // pixel size
 889
 890         // swap rgb to bgr and flip upside down
 891         out = buffer + 18;
 892         for (y = height - 1;y >= 0;y--)
 893         {
 894                 in = data + y * width * 3;
 895                 end = in + width * 3;
 896                 for (;in < end;in += 3)
 897                 {
 898                         *out++ = in[2];
 899                         *out++ = in[1];
 900                         *out++ = in[0];
 901                 }
 902         }
 903         FS_WriteFile (filename, buffer, width*height*3 + 18 );
 904
 905         Mem_Free(buffer);
 906 }
 907
 908 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
 909 {
 910         int y;
 911         qbyte *buffer, *out;
 912         const qbyte *in, *end;
 913
 914         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
 915
 916         memset (buffer, 0, 18);
 917         buffer[2] = 2;          // uncompressed type
 918         buffer[12] = (width >> 0) & 0xFF;
 919         buffer[13] = (width >> 8) & 0xFF;
 920         buffer[14] = (height >> 0) & 0xFF;
 921         buffer[15] = (height >> 8) & 0xFF;
 922         buffer[16] = 32;        // pixel size
 923         buffer[17] = 8; // transparent flag? (seems to be needed by gimp)
 924
 925         // swap rgba to bgra and flip upside down
 926         out = buffer + 18;
 927         for (y = height - 1;y >= 0;y--)
 928         {
 929                 in = data + y * width * 4;
 930                 end = in + width * 4;
 931                 for (;in < end;in += 4)
 932                 {
 933                         *out++ = in[2];
 934                         *out++ = in[1];
 935                         *out++ = in[0];
 936                         *out++ = in[3];
 937                 }
 938         }
 939         FS_WriteFile (filename, buffer, width*height*4 + 18 );
 940
 941         Mem_Free(buffer);
 942 }
 943
 944 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
 945 {
 946         const qbyte *end;
 947         if (rgba)
 948         {
 949                 // check alpha bytes
 950                 for (end = data + size * 4, data += 3;data < end;data += 4)
 951                         if (*data < 255)
 952                                 return 1;
 953         }
 954         else
 955         {
 956                 // color 255 is transparent
 957                 for (end = data + size;data < end;data++)
 958                         if (*data == 255)
 959                                 return 1;
 960         }
 961         return 0;
 962 }
 963
 964 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 965 {
 966         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 967         fstep = (int) (inwidth*65536.0f/outwidth);
 968         endx = (inwidth-1);
 969         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 970         {
 971                 xi = f >> 16;
 972                 if (xi != oldx)
 973                 {
 974                         in += (xi - oldx) * 4;
 975                         oldx = xi;
 976                 }
 977                 if (xi < endx)
 978                 {
 979                         lerp = f & 0xFFFF;
 980                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 981                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 982                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 983                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 984                 }
 985                 else // last pixel of the line has no pixel to lerp to
 986                 {
 987                         *out++ = in[0];
 988                         *out++ = in[1];
 989                         *out++ = in[2];
 990                         *out++ = in[3];
 991                 }
 992         }
 993 }
 994
 995 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 996 {
 997         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 998         fstep = (int) (inwidth*65536.0f/outwidth);
 999         endx = (inwidth-1);
1000         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1001         {
1002                 xi = f >> 16;
1003                 if (xi != oldx)
1004                 {
1005                         in += (xi - oldx) * 3;
1006                         oldx = xi;
1007                 }
1008                 if (xi < endx)
1009                 {
1010                         lerp = f & 0xFFFF;
1011                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1012                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1013                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1014                 }
1015                 else // last pixel of the line has no pixel to lerp to
1016                 {
1017                         *out++ = in[0];
1018                         *out++ = in[1];
1019                         *out++ = in[2];
1020                 }
1021         }
1022 }
1023
1024 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1025 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1026 {
1027         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1028         qbyte *out;
1029         const qbyte *inrow;
1030         qbyte *resamplerow1;
1031         qbyte *resamplerow2;
1032         out = outdata;
1033         fstep = (int) (inheight*65536.0f/outheight);
1034
1035         resamplerow1 = Mem_Alloc(tempmempool, outwidth*4*2);
1036         resamplerow2 = resamplerow1 + outwidth*4;
1037
1038         inrow = indata;
1039         oldy = 0;
1040         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1041         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1042         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1043         {
1044                 yi = f >> 16;
1045                 if (yi < endy)
1046                 {
1047                         lerp = f & 0xFFFF;
1048                         if (yi != oldy)
1049                         {
1050                                 inrow = (qbyte *)indata + inwidth4*yi;
1051                                 if (yi == oldy+1)
1052                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1053                                 else
1054                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1055                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1056                                 oldy = yi;
1057                         }
1058                         j = outwidth - 4;
1059                         while(j >= 0)
1060                         {
1061                                 LERPBYTE( 0);
1062                                 LERPBYTE( 1);
1063                                 LERPBYTE( 2);
1064                                 LERPBYTE( 3);
1065                                 LERPBYTE( 4);
1066                                 LERPBYTE( 5);
1067                                 LERPBYTE( 6);
1068                                 LERPBYTE( 7);
1069                                 LERPBYTE( 8);
1070                                 LERPBYTE( 9);
1071                                 LERPBYTE(10);
1072                                 LERPBYTE(11);
1073                                 LERPBYTE(12);
1074                                 LERPBYTE(13);
1075                                 LERPBYTE(14);
1076                                 LERPBYTE(15);
1077                                 out += 16;
1078                                 resamplerow1 += 16;
1079                                 resamplerow2 += 16;
1080                                 j -= 4;
1081                         }
1082                         if (j & 2)
1083                         {
1084                                 LERPBYTE( 0);
1085                                 LERPBYTE( 1);
1086                                 LERPBYTE( 2);
1087                                 LERPBYTE( 3);
1088                                 LERPBYTE( 4);
1089                                 LERPBYTE( 5);
1090                                 LERPBYTE( 6);
1091                                 LERPBYTE( 7);
1092                                 out += 8;
1093                                 resamplerow1 += 8;
1094                                 resamplerow2 += 8;
1095                         }
1096                         if (j & 1)
1097                         {
1098                                 LERPBYTE( 0);
1099                                 LERPBYTE( 1);
1100                                 LERPBYTE( 2);
1101                                 LERPBYTE( 3);
1102                                 out += 4;
1103                                 resamplerow1 += 4;
1104                                 resamplerow2 += 4;
1105                         }
1106                         resamplerow1 -= outwidth4;
1107                         resamplerow2 -= outwidth4;
1108                 }
1109                 else
1110                 {
1111                         if (yi != oldy)
1112                         {
1113                                 inrow = (qbyte *)indata + inwidth4*yi;
1114                                 if (yi == oldy+1)
1115                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1116                                 else
1117                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1118                                 oldy = yi;
1119                         }
1120                         memcpy(out, resamplerow1, outwidth4);
1121                 }
1122         }
1123
1124         Mem_Free(resamplerow1);
1125         resamplerow1 = NULL;
1126         resamplerow2 = NULL;
1127 }
1128
1129 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1130 {
1131         int i, j;
1132         unsigned frac, fracstep;
1133         // relies on int being 4 bytes
1134         int *inrow, *out;
1135         out = outdata;
1136
1137         fracstep = inwidth*0x10000/outwidth;
1138         for (i = 0;i < outheight;i++)
1139         {
1140                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1141                 frac = fracstep >> 1;
1142                 j = outwidth - 4;
1143                 while (j >= 0)
1144                 {
1145                         out[0] = inrow[frac >> 16];frac += fracstep;
1146                         out[1] = inrow[frac >> 16];frac += fracstep;
1147                         out[2] = inrow[frac >> 16];frac += fracstep;
1148                         out[3] = inrow[frac >> 16];frac += fracstep;
1149                         out += 4;
1150                         j -= 4;
1151                 }
1152                 if (j & 2)
1153                 {
1154                         out[0] = inrow[frac >> 16];frac += fracstep;
1155                         out[1] = inrow[frac >> 16];frac += fracstep;
1156                         out += 2;
1157                 }
1158                 if (j & 1)
1159                 {
1160                         out[0] = inrow[frac >> 16];frac += fracstep;
1161                         out += 1;
1162                 }
1163         }
1164 }
1165
1166 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1167 {
1168         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1169         qbyte *out;
1170         const qbyte *inrow;
1171         qbyte *resamplerow1;
1172         qbyte *resamplerow2;
1173         out = outdata;
1174         fstep = (int) (inheight*65536.0f/outheight);
1175
1176         resamplerow1 = Mem_Alloc(tempmempool, outwidth*3*2);
1177         resamplerow2 = resamplerow1 + outwidth*3;
1178
1179         inrow = indata;
1180         oldy = 0;
1181         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1182         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1183         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1184         {
1185                 yi = f >> 16;
1186                 if (yi < endy)
1187                 {
1188                         lerp = f & 0xFFFF;
1189                         if (yi != oldy)
1190                         {
1191                                 inrow = (qbyte *)indata + inwidth3*yi;
1192                                 if (yi == oldy+1)
1193                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1194                                 else
1195                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1196                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1197                                 oldy = yi;
1198                         }
1199                         j = outwidth - 4;
1200                         while(j >= 0)
1201                         {
1202                                 LERPBYTE( 0);
1203                                 LERPBYTE( 1);
1204                                 LERPBYTE( 2);
1205                                 LERPBYTE( 3);
1206                                 LERPBYTE( 4);
1207                                 LERPBYTE( 5);
1208                                 LERPBYTE( 6);
1209                                 LERPBYTE( 7);
1210                                 LERPBYTE( 8);
1211                                 LERPBYTE( 9);
1212                                 LERPBYTE(10);
1213                                 LERPBYTE(11);
1214                                 out += 12;
1215                                 resamplerow1 += 12;
1216                                 resamplerow2 += 12;
1217                                 j -= 4;
1218                         }
1219                         if (j & 2)
1220                         {
1221                                 LERPBYTE( 0);
1222                                 LERPBYTE( 1);
1223                                 LERPBYTE( 2);
1224                                 LERPBYTE( 3);
1225                                 LERPBYTE( 4);
1226                                 LERPBYTE( 5);
1227                                 out += 6;
1228                                 resamplerow1 += 6;
1229                                 resamplerow2 += 6;
1230                         }
1231                         if (j & 1)
1232                         {
1233                                 LERPBYTE( 0);
1234                                 LERPBYTE( 1);
1235                                 LERPBYTE( 2);
1236                                 out += 3;
1237                                 resamplerow1 += 3;
1238                                 resamplerow2 += 3;
1239                         }
1240                         resamplerow1 -= outwidth3;
1241                         resamplerow2 -= outwidth3;
1242                 }
1243                 else
1244                 {
1245                         if (yi != oldy)
1246                         {
1247                                 inrow = (qbyte *)indata + inwidth3*yi;
1248                                 if (yi == oldy+1)
1249                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1250                                 else
1251                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1252                                 oldy = yi;
1253                         }
1254                         memcpy(out, resamplerow1, outwidth3);
1255                 }
1256         }
1257         Mem_Free(resamplerow1);
1258         resamplerow1 = NULL;
1259         resamplerow2 = NULL;
1260 }
1261
1262 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1263 {
1264         int i, j, f, inwidth3 = inwidth * 3;
1265         unsigned frac, fracstep;
1266         qbyte *inrow, *out;
1267         out = outdata;
1268
1269         fracstep = inwidth*0x10000/outwidth;
1270         for (i = 0;i < outheight;i++)
1271         {
1272                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1273                 frac = fracstep >> 1;
1274                 j = outwidth - 4;
1275                 while (j >= 0)
1276                 {
1277                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1278                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1279                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1280                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1281                         j -= 4;
1282                 }
1283                 if (j & 2)
1284                 {
1285                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1286                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1287                         out += 2;
1288                 }
1289                 if (j & 1)
1290                 {
1291                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1292                         out += 1;
1293                 }
1294         }
1295 }
1296
1297 /*
1298 ================
1299 Image_Resample
1300 ================
1301 */
1302 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1303 {
1304         if (indepth != 1 || outdepth != 1)
1305                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1306         if (bytesperpixel == 4)
1307         {
1308                 if (quality)
1309                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1310                 else
1311                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1312         }
1313         else if (bytesperpixel == 3)
1314         {
1315                 if (quality)
1316                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1317                 else
1318                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1319         }
1320         else
1321                 Sys_Error("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1322 }
1323
1324 // in can be the same as out
1325 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1326 {
1327         int x, y, nextrow;
1328         if (*depth != 1 || destdepth != 1)
1329                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1330         nextrow = *width * bytesperpixel;
1331         if (*width > destwidth)
1332         {
1333                 *width >>= 1;
1334                 if (*height > destheight)
1335                 {
1336                         // reduce both
1337                         *height >>= 1;
1338                         if (bytesperpixel == 4)
1339                         {
1340                                 for (y = 0;y < *height;y++)
1341                                 {
1342                                         for (x = 0;x < *width;x++)
1343                                         {
1344                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1345                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1346                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1347                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1348                                                 out += 4;
1349                                                 in += 8;
1350                                         }
1351                                         in += nextrow; // skip a line
1352                                 }
1353                         }
1354                         else if (bytesperpixel == 3)
1355                         {
1356                                 for (y = 0;y < *height;y++)
1357                                 {
1358                                         for (x = 0;x < *width;x++)
1359                                         {
1360                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1361                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1362                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1363                                                 out += 3;
1364                                                 in += 6;
1365                                         }
1366                                         in += nextrow; // skip a line
1367                                 }
1368                         }
1369                         else
1370                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1371                 }
1372                 else
1373                 {
1374                         // reduce width
1375                         if (bytesperpixel == 4)
1376                         {
1377                                 for (y = 0;y < *height;y++)
1378                                 {
1379                                         for (x = 0;x < *width;x++)
1380                                         {
1381                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1382                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1383                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1384                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1385                                                 out += 4;
1386                                                 in += 8;
1387                                         }
1388                                 }
1389                         }
1390                         else if (bytesperpixel == 3)
1391                         {
1392                                 for (y = 0;y < *height;y++)
1393                                 {
1394                                         for (x = 0;x < *width;x++)
1395                                         {
1396                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1397                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1398                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1399                                                 out += 3;
1400                                                 in += 6;
1401                                         }
1402                                 }
1403                         }
1404                         else
1405                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1406                 }
1407         }
1408         else
1409         {
1410                 if (*height > destheight)
1411                 {
1412                         // reduce height
1413                         *height >>= 1;
1414                         if (bytesperpixel == 4)
1415                         {
1416                                 for (y = 0;y < *height;y++)
1417                                 {
1418                                         for (x = 0;x < *width;x++)
1419                                         {
1420                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1421                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1422                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1423                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1424                                                 out += 4;
1425                                                 in += 4;
1426                                         }
1427                                         in += nextrow; // skip a line
1428                                 }
1429                         }
1430                         else if (bytesperpixel == 3)
1431                         {
1432                                 for (y = 0;y < *height;y++)
1433                                 {
1434                                         for (x = 0;x < *width;x++)
1435                                         {
1436                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1437                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1438                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1439                                                 out += 3;
1440                                                 in += 3;
1441                                         }
1442                                         in += nextrow; // skip a line
1443                                 }
1444                         }
1445                         else
1446                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1447                 }
1448                 else
1449                         Sys_Error("Image_MipReduce: desired size already achieved\n");
1450         }
1451 }
1452
1453 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1454 {
1455         int x, y;
1456         const unsigned char *p0, *p1, *p2;
1457         unsigned char *out;
1458         float iwidth, iheight, ibumpscale, n[3];
1459         iwidth = 1.0f / width;
1460         iheight = 1.0f / height;
1461         ibumpscale = (255.0f * 3.0f) / bumpscale;
1462         out = outpixels;
1463         for (y = 0;y < height;y++)
1464         {
1465                 for (x = 0;x < width;x++)
1466                 {
1467                         p0 = inpixels + (y * width + x) * 4;
1468                         if (x == width - 1)
1469                         {
1470                                 if (clamp)
1471                                         p1 = inpixels + (y * width + x) * 4;
1472                                 else
1473                                         p1 = inpixels + (y * width) * 4;
1474                         }
1475                         else
1476                                 p1 = inpixels + (y * width + x + 1) * 4;
1477                         if (y == height - 1)
1478                         {
1479                                 if (clamp)
1480                                         p2 = inpixels + (y * width + x) * 4;
1481                                 else
1482                                         p2 = inpixels + x * 4;
1483                         }
1484                         else
1485                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1486                         /*
1487                         dv[0][0] = iwidth;
1488                         dv[0][1] = 0;
1489                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1490                         dv[1][0] = 0;
1491                         dv[1][1] = iheight;
1492                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1493                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1494                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1495                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1496                         */
1497                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1498                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1499                         n[2] = ibumpscale;
1500                         VectorNormalize(n);
1501                         /*
1502                         // this should work for the bottom right triangle if anyone wants
1503                         // code for that for some reason
1504                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1505                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1506                         n[2] = ibumpscale;
1507                         VectorNormalize(n);
1508                         */
1509                         out[0] = 128.0f + n[0] * 127.0f;
1510                         out[1] = 128.0f + n[1] * 127.0f;
1511                         out[2] = 128.0f + n[2] * 127.0f;
1512                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1513                         out += 4;
1514                 }
1515         }
1516 }
1517
1518 int image_loadskin(imageskin_t *s, char *shadername)
1519 {
1520         int j;
1521         qbyte *bumppixels;
1522         int bumppixels_width, bumppixels_height;
1523         char name[MAX_QPATH];
1524         Image_StripImageExtension(shadername, name);
1525         memset(s, 0, sizeof(*s));
1526         s->basepixels = loadimagepixels(name, false, 0, 0);
1527         if (s->basepixels == NULL)
1528                 return false;
1529         s->basepixels_width = image_width;
1530         s->basepixels_height = image_height;
1531
1532         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1533         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1534         {
1535                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1536                 s->maskpixels_width = s->basepixels_width;
1537                 s->maskpixels_height = s->basepixels_height;
1538                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1539                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1540                 {
1541                         s->maskpixels[j+0] = 255;
1542                         s->maskpixels[j+1] = 255;
1543                         s->maskpixels[j+2] = 255;
1544                 }
1545         }
1546
1547         // _luma is supported for tenebrae compatibility
1548         // (I think it's a very stupid name, but oh well)
1549         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1550          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1551         {
1552                 s->glowpixels_width = image_width;
1553                 s->glowpixels_height = image_height;
1554         }
1555         // _norm is the name used by tenebrae
1556         // (I don't like the name much)
1557         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1558         {
1559                 s->nmappixels_width = image_width;
1560                 s->nmappixels_height = image_height;
1561         }
1562         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1563         {
1564                 bumppixels_width = image_width;
1565                 bumppixels_height = image_height;
1566         }
1567         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1568         {
1569                 s->glosspixels_width = image_width;
1570                 s->glosspixels_height = image_height;
1571         }
1572         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1573         {
1574                 s->pantspixels_width = image_width;
1575                 s->pantspixels_height = image_height;
1576         }
1577         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1578         {
1579                 s->shirtpixels_width = image_width;
1580                 s->shirtpixels_height = image_height;
1581         }
1582
1583         if (s->nmappixels == NULL)
1584         {
1585                 if (bumppixels != NULL)
1586                 {
1587                         if (r_shadow_bumpscale_bumpmap.value > 0)
1588                         {
1589                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1590                                 s->nmappixels_width = bumppixels_width;
1591                                 s->nmappixels_height = bumppixels_height;
1592                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1593                         }
1594                 }
1595                 else
1596                 {
1597                         if (r_shadow_bumpscale_basetexture.value > 0)
1598                         {
1599                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1600                                 s->nmappixels_width = s->basepixels_width;
1601                                 s->nmappixels_height = s->basepixels_height;
1602                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1603                         }
1604                 }
1605         }
1606         if (bumppixels != NULL)
1607                 Mem_Free(bumppixels);
1608         return true;
1609 }
1610
1611 void image_freeskin(imageskin_t *s)
1612 {
1613         if (s->basepixels)
1614                 Mem_Free(s->basepixels);
1615         if (s->maskpixels)
1616                 Mem_Free(s->maskpixels);
1617         if (s->nmappixels)
1618                 Mem_Free(s->nmappixels);
1619         if (s->glowpixels)
1620                 Mem_Free(s->glowpixels);
1621         if (s->glosspixels)
1622                 Mem_Free(s->glosspixels);
1623         if (s->pantspixels)
1624                 Mem_Free(s->pantspixels);
1625         if (s->shirtpixels)
1626                 Mem_Free(s->shirtpixels);
1627         memset(s, 0, sizeof(*s));
1628 }
1629