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 (const 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 (loadsize < (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         if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || pcx.xmax > 320 || pcx.ymax > 256)
 118         {
 119                 Con_Printf ("Bad pcx file\n");
 120                 return NULL;
 121         }
 122
 123         if (matchwidth && (pcx.xmax+1) != matchwidth)
 124         {
 125                 return NULL;
 126         }
 127         if (matchheight && (pcx.ymax+1) != matchheight)
 128         {
 129                 return NULL;
 130         }
 131
 132         image_width = pcx.xmax+1;
 133         image_height = pcx.ymax+1;
 134
 135         palette = f + loadsize - 768;
 136
 137         image_rgba = Mem_Alloc(tempmempool, image_width*image_height*4);
 138         if (!image_rgba)
 139         {
 140                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 141                 return NULL;
 142         }
 143         pbuf = image_rgba + image_width*image_height*3;
 144         enddata = palette;
 145
 146         for (y = 0;y < image_height && fin < enddata;y++)
 147         {
 148                 a = pbuf + y * image_width;
 149                 for (x = 0;x < image_width && fin < enddata;)
 150                 {
 151                         dataByte = *fin++;
 152                         if(dataByte >= 0xC0)
 153                         {
 154                                 if (fin >= enddata)
 155                                         break;
 156                                 x2 = x + (dataByte & 0x3F);
 157                                 dataByte = *fin++;
 158                                 if (x2 > image_width)
 159                                         x2 = image_width; // technically an error
 160                                 while(x < x2)
 161                                         a[x++] = dataByte;
 162                         }
 163                         else
 164                                 a[x++] = dataByte;
 165                 }
 166                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
 167                 while(x < image_width)
 168                         a[x++] = 0;
 169         }
 170
 171         a = image_rgba;
 172         b = pbuf;
 173
 174         for(x = 0;x < image_width*image_height;x++)
 175         {
 176                 y = *b++ * 3;
 177                 *a++ = palette[y];
 178                 *a++ = palette[y+1];
 179                 *a++ = palette[y+2];
 180                 *a++ = 255;
 181         }
 182
 183         return image_rgba;
 184 }
 185
 186 /*
 187 =========================================================
 188
 189 TARGA LOADING
 190
 191 =========================================================
 192 */
 193
 194 typedef struct _TargaHeader
 195 {
 196         unsigned char   id_length, colormap_type, image_type;
 197         unsigned short  colormap_index, colormap_length;
 198         unsigned char   colormap_size;
 199         unsigned short  x_origin, y_origin, width, height;
 200         unsigned char   pixel_size, attributes;
 201 }
 202 TargaHeader;
 203
 204 void PrintTargaHeader(TargaHeader *t)
 205 {
 206         Con_Printf("TargaHeader:\n");
 207         Con_Printf("uint8 id_length = %i;\n", t->id_length);
 208         Con_Printf("uint8 colormap_type = %i;\n", t->colormap_type);
 209         Con_Printf("uint8 image_type = %i;\n", t->image_type);
 210         Con_Printf("uint16 colormap_index = %i;\n", t->colormap_index);
 211         Con_Printf("uint16 colormap_length = %i;\n", t->colormap_length);
 212         Con_Printf("uint8 colormap_size = %i;\n", t->colormap_size);
 213         Con_Printf("uint16 x_origin = %i;\n", t->x_origin);
 214         Con_Printf("uint16 y_origin = %i;\n", t->y_origin);
 215         Con_Printf("uint16 width = %i;\n", t->width);
 216         Con_Printf("uint16 height = %i;\n", t->height);
 217         Con_Printf("uint8 pixel_size = %i;\n", t->pixel_size);
 218         Con_Printf("uint8 attributes = %i;\n", t->attributes);
 219 }
 220
 221 /*
 222 =============
 223 LoadTGA
 224 =============
 225 */
 226 qbyte *LoadTGA (const qbyte *f, int matchwidth, int matchheight)
 227 {
 228         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen;
 229         qbyte *pixbuf, *image_rgba;
 230         const qbyte *fin, *enddata;
 231         TargaHeader targa_header;
 232         unsigned char palette[256*4], *p;
 233
 234         if (loadsize < 19)
 235                 return NULL;
 236
 237         enddata = f + loadsize;
 238
 239         targa_header.id_length = f[0];
 240         targa_header.colormap_type = f[1];
 241         targa_header.image_type = f[2];
 242
 243         targa_header.colormap_index = f[3] + f[4] * 256;
 244         targa_header.colormap_length = f[5] + f[6] * 256;
 245         targa_header.colormap_size = f[7];
 246         targa_header.x_origin = f[8] + f[9] * 256;
 247         targa_header.y_origin = f[10] + f[11] * 256;
 248         targa_header.width = f[12] + f[13] * 256;
 249         targa_header.height = f[14] + f[15] * 256;
 250         if (matchwidth && targa_header.width != matchwidth)
 251                 return NULL;
 252         if (matchheight && targa_header.height != matchheight)
 253                 return NULL;
 254         targa_header.pixel_size = f[16];
 255         targa_header.attributes = f[17];
 256
 257         image_width = targa_header.width;
 258         image_height = targa_header.height;
 259
 260         fin = f + 18;
 261         if (targa_header.id_length != 0)
 262                 fin += targa_header.id_length;  // skip TARGA image comment
 263         if (targa_header.image_type == 2 || targa_header.image_type == 10)
 264         {
 265                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 266                 {
 267                         Con_Printf ("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 268                         PrintTargaHeader(&targa_header);
 269                         return NULL;
 270                 }
 271         }
 272         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
 273         {
 274                 if (targa_header.pixel_size != 8)
 275                 {
 276                         Con_Printf ("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 277                         PrintTargaHeader(&targa_header);
 278                         return NULL;
 279                 }
 280                 if (targa_header.colormap_length != 256)
 281                 {
 282                         Con_Printf ("LoadTGA: only 256 colormap_length supported\n");
 283                         PrintTargaHeader(&targa_header);
 284                         return NULL;
 285                 }
 286                 if (targa_header.colormap_index)
 287                 {
 288                         Con_Printf ("LoadTGA: colormap_index not supported\n");
 289                         PrintTargaHeader(&targa_header);
 290                         return NULL;
 291                 }
 292                 if (targa_header.colormap_size == 24)
 293                 {
 294                         for (x = 0;x < targa_header.colormap_length;x++)
 295                         {
 296                                 palette[x*4+2] = *fin++;
 297                                 palette[x*4+1] = *fin++;
 298                                 palette[x*4+0] = *fin++;
 299                                 palette[x*4+3] = 255;
 300                         }
 301                 }
 302                 else if (targa_header.colormap_size == 32)
 303                 {
 304                         for (x = 0;x < targa_header.colormap_length;x++)
 305                         {
 306                                 palette[x*4+2] = *fin++;
 307                                 palette[x*4+1] = *fin++;
 308                                 palette[x*4+0] = *fin++;
 309                                 palette[x*4+3] = *fin++;
 310                         }
 311                 }
 312                 else
 313                 {
 314                         Con_Printf ("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 315                         PrintTargaHeader(&targa_header);
 316                         return NULL;
 317                 }
 318         }
 319         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
 320         {
 321                 if (targa_header.pixel_size != 8)
 322                 {
 323                         Con_Printf ("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 324                         PrintTargaHeader(&targa_header);
 325                         return NULL;
 326                 }
 327         }
 328         else
 329         {
 330                 Con_Printf ("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 331                 PrintTargaHeader(&targa_header);
 332                 return NULL;
 333         }
 334
 335         if (targa_header.attributes & 0x10)
 336         {
 337                 Con_Printf ("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 338                 return NULL;
 339         }
 340
 341         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 342         if (!image_rgba)
 343         {
 344                 Con_Printf ("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 345                 return NULL;
 346         }
 347
 348         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 349         if ((targa_header.attributes & 0x20) == 0)
 350         {
 351                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
 352                 row_inc = -image_width*4*2;
 353         }
 354         else
 355         {
 356                 pixbuf = image_rgba;
 357                 row_inc = 0;
 358         }
 359
 360         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
 361         x = 0;
 362         y = 0;
 363         red = green = blue = alpha = 255;
 364         while (y < image_height)
 365         {
 366                 // decoder is mostly the same whether it's compressed or not
 367                 readpixelcount = 1000000;
 368                 runlen = 1000000;
 369                 if (compressed && fin < enddata)
 370                 {
 371                         runlen = *fin++;
 372                         // high bit indicates this is an RLE compressed run
 373                         if (runlen & 0x80)
 374                                 readpixelcount = 1;
 375                         runlen = 1 + (runlen & 0x7f);
 376                 }
 377
 378                 while((runlen--) && y < image_height)
 379                 {
 380                         if (readpixelcount > 0)
 381                         {
 382                                 readpixelcount--;
 383                                 red = green = blue = alpha = 255;
 384                                 if (fin < enddata)
 385                                 {
 386                                         switch(targa_header.image_type)
 387                                         {
 388                                         case 1:
 389                                         case 9:
 390                                                 // colormapped
 391                                                 p = palette + (*fin++) * 4;
 392                                                 red = p[0];
 393                                                 green = p[1];
 394                                                 blue = p[2];
 395                                                 alpha = p[3];
 396                                                 break;
 397                                         case 2:
 398                                         case 10:
 399                                                 // BGR or BGRA
 400                                                 blue = *fin++;
 401                                                 if (fin < enddata)
 402                                                         green = *fin++;
 403                                                 if (fin < enddata)
 404                                                         red = *fin++;
 405                                                 if (targa_header.pixel_size == 32 && fin < enddata)
 406                                                         alpha = *fin++;
 407                                                 break;
 408                                         case 3:
 409                                         case 11:
 410                                                 // greyscale
 411                                                 red = green = blue = *fin++;
 412                                                 break;
 413                                         }
 414                                 }
 415                         }
 416                         *pixbuf++ = red;
 417                         *pixbuf++ = green;
 418                         *pixbuf++ = blue;
 419                         *pixbuf++ = alpha;
 420                         x++;
 421                         if (x == image_width)
 422                         {
 423                                 // end of line, advance to next
 424                                 x = 0;
 425                                 y++;
 426                                 pixbuf += row_inc;
 427                         }
 428                 }
 429         }
 430
 431         return image_rgba;
 432 }
 433
 434 /*
 435 ============
 436 LoadLMP
 437 ============
 438 */
 439 qbyte *LoadLMP (const qbyte *f, int matchwidth, int matchheight)
 440 {
 441         qbyte *image_rgba;
 442         int width, height;
 443
 444         if (loadsize < 9)
 445         {
 446                 Con_Printf("LoadLMP: invalid LMP file\n");
 447                 return NULL;
 448         }
 449
 450         // parse the very complicated header *chuckle*
 451         width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
 452         height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
 453         if ((unsigned) width > 4096 || (unsigned) height > 4096)
 454         {
 455                 Con_Printf("LoadLMP: invalid size\n");
 456                 return NULL;
 457         }
 458         if ((matchwidth && width != matchwidth) || (matchheight && height != matchheight))
 459                 return NULL;
 460
 461         if (loadsize < 8 + width * height)
 462         {
 463                 Con_Printf("LoadLMP: invalid LMP file\n");
 464                 return NULL;
 465         }
 466
 467         image_width = width;
 468         image_height = height;
 469
 470         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
 471         if (!image_rgba)
 472         {
 473                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
 474                 return NULL;
 475         }
 476         Image_Copy8bitRGBA(f + 8, image_rgba, image_width * image_height, palette_complete);
 477         return image_rgba;
 478 }
 479
 480 /*
 481 ============
 482 LoadLMP
 483 ============
 484 */
 485 qbyte *LoadLMPAs8Bit (const qbyte *f, int matchwidth, int matchheight)
 486 {
 487         qbyte *image_8bit;
 488         int width, height;
 489
 490         if (loadsize < 9)
 491         {
 492                 Con_Printf("LoadLMPAs8Bit: invalid LMP file\n");
 493                 return NULL;
 494         }
 495
 496         // parse the very complicated header *chuckle*
 497         width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
 498         height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
 499         if ((unsigned) width > 4096 || (unsigned) height > 4096)
 500         {
 501                 Con_Printf("LoadLMPAs8Bit: invalid size\n");
 502                 return NULL;
 503         }
 504         if ((matchwidth && width != matchwidth) || (matchheight && height != matchheight))
 505                 return NULL;
 506
 507         if (loadsize < 8 + width * height)
 508         {
 509                 Con_Printf("LoadLMPAs8Bit: invalid LMP file\n");
 510                 return NULL;
 511         }
 512
 513         image_width = width;
 514         image_height = height;
 515
 516         image_8bit = Mem_Alloc(tempmempool, image_width * image_height);
 517         if (!image_8bit)
 518         {
 519                 Con_Printf("LoadLMPAs8Bit: not enough memory for %i by %i image\n", image_width, image_height);
 520                 return NULL;
 521         }
 522         memcpy(image_8bit, f + 8, image_width * image_height);
 523         return image_8bit;
 524 }
 525
 526 void Image_StripImageExtension (const char *in, char *out)
 527 {
 528         const char *end, *temp;
 529         end = in + strlen(in);
 530         if ((end - in) >= 4)
 531         {
 532                 temp = end - 4;
 533                 if (strcmp(temp, ".tga") == 0 || strcmp(temp, ".pcx") == 0 || strcmp(temp, ".lmp") == 0)
 534                         end = temp;
 535                 while (in < end)
 536                         *out++ = *in++;
 537                 *out++ = 0;
 538         }
 539         else
 540                 strcpy(out, in);
 541 }
 542
 543 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
 544 {
 545         qbyte *f, *data;
 546         char basename[MAX_QPATH], name[MAX_QPATH], *c;
 547         Image_StripImageExtension(filename, basename); // strip filename extensions to allow replacement by other types
 548         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 549         for (c = basename;*c;c++)
 550                 if (*c == '*')
 551                         *c = '#';
 552         sprintf (name, "override/%s.tga", basename);
 553         f = COM_LoadFile(name, true);
 554         if (f)
 555         {
 556                 data = LoadTGA (f, matchwidth, matchheight);
 557                 Mem_Free(f);
 558                 return data;
 559         }
 560         sprintf (name, "override/%s.jpg", basename);
 561         f = COM_LoadFile(name, true);
 562         if (f)
 563         {
 564                 data = JPEG_LoadImage (f, matchwidth, matchheight);
 565                 Mem_Free(f);
 566                 return data;
 567         }
 568         sprintf (name, "textures/%s.tga", basename);
 569         f = COM_LoadFile(name, true);
 570         if (f)
 571         {
 572                 data = LoadTGA (f, matchwidth, matchheight);
 573                 Mem_Free(f);
 574                 return data;
 575         }
 576         sprintf (name, "textures/%s.jpg", basename);
 577         f = COM_LoadFile(name, true);
 578         if (f)
 579         {
 580                 data = JPEG_LoadImage (f, matchwidth, matchheight);
 581                 Mem_Free(f);
 582                 return data;
 583         }
 584         sprintf (name, "textures/%s.pcx", basename);
 585         f = COM_LoadFile(name, true);
 586         if (f)
 587         {
 588                 data = LoadPCX (f, matchwidth, matchheight);
 589                 Mem_Free(f);
 590                 return data;
 591         }
 592         sprintf (name, "%s.tga", basename);
 593         f = COM_LoadFile(name, true);
 594         if (f)
 595         {
 596                 data = LoadTGA (f, matchwidth, matchheight);
 597                 Mem_Free(f);
 598                 return data;
 599         }
 600         sprintf (name, "%s.jpg", basename);
 601         f = COM_LoadFile(name, true);
 602         if (f)
 603         {
 604                 data = JPEG_LoadImage (f, matchwidth, matchheight);
 605                 Mem_Free(f);
 606                 return data;
 607         }
 608         sprintf (name, "%s.pcx", basename);
 609         f = COM_LoadFile(name, true);
 610         if (f)
 611         {
 612                 data = LoadPCX (f, matchwidth, matchheight);
 613                 Mem_Free(f);
 614                 return data;
 615         }
 616         sprintf (name, "%s.lmp", basename);
 617         f = COM_LoadFile(name, true);
 618         if (f)
 619         {
 620                 data = LoadLMP (f, matchwidth, matchheight);
 621                 Mem_Free(f);
 622                 return data;
 623         }
 624         if (complain)
 625                 Con_Printf ("Couldn't load %s.tga, .jpg, .pcx, .lmp\n", filename);
 626         return NULL;
 627 }
 628
 629 int image_makemask (const qbyte *in, qbyte *out, int size)
 630 {
 631         int i, count;
 632         count = 0;
 633         for (i = 0;i < size;i++)
 634         {
 635                 out[0] = out[1] = out[2] = 255;
 636                 out[3] = in[3];
 637                 if (in[3] != 255)
 638                         count++;
 639                 in += 4;
 640                 out += 4;
 641         }
 642         return count;
 643 }
 644
 645 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
 646 {
 647         qbyte *in, *data;
 648         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
 649         if (!data)
 650                 return NULL;
 651         if (image_makemask(data, data, image_width * image_height))
 652                 return data; // some transparency
 653         else
 654         {
 655                 Mem_Free(data);
 656                 return NULL; // all opaque
 657         }
 658 }
 659
 660 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 661 {
 662         qbyte *data;
 663         rtexture_t *rt;
 664         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 665                 return 0;
 666         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 667         Mem_Free(data);
 668         return rt;
 669 }
 670
 671 rtexture_t *loadtextureimagemask (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 = loadimagepixelsmask (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 *image_masktex;
 683 rtexture_t *image_nmaptex;
 684 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
 685 {
 686         qbyte *data;
 687         rtexture_t *rt;
 688         image_masktex = NULL;
 689         image_nmaptex = NULL;
 690         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 691                 return 0;
 692
 693         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 694
 695         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
 696                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 697
 698         Mem_Free(data);
 699         return rt;
 700 }
 701
 702 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 703 {
 704         qbyte *data, *data2;
 705         rtexture_t *rt;
 706         image_masktex = NULL;
 707         image_nmaptex = NULL;
 708         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 709                 return 0;
 710
 711         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 712
 713         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
 714
 715         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 716         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 717
 718         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
 719                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 720
 721         Mem_Free(data2);
 722
 723         Mem_Free(data);
 724         return rt;
 725 }
 726
 727 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
 728 {
 729         qbyte *data, *data2;
 730         rtexture_t *rt;
 731         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
 732                 return 0;
 733         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
 734
 735         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
 736         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
 737
 738         Mem_Free(data2);
 739         Mem_Free(data);
 740         return rt;
 741 }
 742
 743 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data)
 744 {
 745         qboolean ret;
 746         qbyte *buffer, *out;
 747         const qbyte *in, *end;
 748
 749         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 750
 751         memset (buffer, 0, 18);
 752         buffer[2] = 2;          // uncompressed type
 753         buffer[12] = (width >> 0) & 0xFF;
 754         buffer[13] = (width >> 8) & 0xFF;
 755         buffer[14] = (height >> 0) & 0xFF;
 756         buffer[15] = (height >> 8) & 0xFF;
 757         buffer[16] = 24;        // pixel size
 758
 759         // swap rgb to bgr
 760         in = data;
 761         out = buffer + 18;
 762         end = in + width*height*3;
 763         for (;in < end;in += 3)
 764         {
 765                 *out++ = in[2];
 766                 *out++ = in[1];
 767                 *out++ = in[0];
 768         }
 769         ret = COM_WriteFile (filename, buffer, width*height*3 + 18 );
 770
 771         Mem_Free(buffer);
 772         return ret;
 773 }
 774
 775 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
 776 {
 777         int y;
 778         qbyte *buffer, *out;
 779         const qbyte *in, *end;
 780
 781         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
 782
 783         memset (buffer, 0, 18);
 784         buffer[2] = 2;          // uncompressed type
 785         buffer[12] = (width >> 0) & 0xFF;
 786         buffer[13] = (width >> 8) & 0xFF;
 787         buffer[14] = (height >> 0) & 0xFF;
 788         buffer[15] = (height >> 8) & 0xFF;
 789         buffer[16] = 24;        // pixel size
 790
 791         // swap rgb to bgr and flip upside down
 792         out = buffer + 18;
 793         for (y = height - 1;y >= 0;y--)
 794         {
 795                 in = data + y * width * 3;
 796                 end = in + width * 3;
 797                 for (;in < end;in += 3)
 798                 {
 799                         *out++ = in[2];
 800                         *out++ = in[1];
 801                         *out++ = in[0];
 802                 }
 803         }
 804         COM_WriteFile (filename, buffer, width*height*3 + 18 );
 805
 806         Mem_Free(buffer);
 807 }
 808
 809 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
 810 {
 811         int y;
 812         qbyte *buffer, *out;
 813         const qbyte *in, *end;
 814
 815         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
 816
 817         memset (buffer, 0, 18);
 818         buffer[2] = 2;          // uncompressed type
 819         buffer[12] = (width >> 0) & 0xFF;
 820         buffer[13] = (width >> 8) & 0xFF;
 821         buffer[14] = (height >> 0) & 0xFF;
 822         buffer[15] = (height >> 8) & 0xFF;
 823         buffer[16] = 32;        // pixel size
 824
 825         // swap rgba to bgra and flip upside down
 826         out = buffer + 18;
 827         for (y = height - 1;y >= 0;y--)
 828         {
 829                 in = data + y * width * 4;
 830                 end = in + width * 4;
 831                 for (;in < end;in += 4)
 832                 {
 833                         *out++ = in[2];
 834                         *out++ = in[1];
 835                         *out++ = in[0];
 836                         *out++ = in[3];
 837                 }
 838         }
 839         COM_WriteFile (filename, buffer, width*height*4 + 18 );
 840
 841         Mem_Free(buffer);
 842 }
 843
 844 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
 845 {
 846         const qbyte *end;
 847         if (rgba)
 848         {
 849                 // check alpha bytes
 850                 for (end = data + size * 4, data += 3;data < end;data += 4)
 851                         if (*data < 255)
 852                                 return 1;
 853         }
 854         else
 855         {
 856                 // color 255 is transparent
 857                 for (end = data + size;data < end;data++)
 858                         if (*data == 255)
 859                                 return 1;
 860         }
 861         return 0;
 862 }
 863
 864 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 865 {
 866         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 867         fstep = (int) (inwidth*65536.0f/outwidth);
 868         endx = (inwidth-1);
 869         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 870         {
 871                 xi = f >> 16;
 872                 if (xi != oldx)
 873                 {
 874                         in += (xi - oldx) * 4;
 875                         oldx = xi;
 876                 }
 877                 if (xi < endx)
 878                 {
 879                         lerp = f & 0xFFFF;
 880                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
 881                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
 882                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
 883                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
 884                 }
 885                 else // last pixel of the line has no pixel to lerp to
 886                 {
 887                         *out++ = in[0];
 888                         *out++ = in[1];
 889                         *out++ = in[2];
 890                         *out++ = in[3];
 891                 }
 892         }
 893 }
 894
 895 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
 896 {
 897         int             j, xi, oldx = 0, f, fstep, endx, lerp;
 898         fstep = (int) (inwidth*65536.0f/outwidth);
 899         endx = (inwidth-1);
 900         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
 901         {
 902                 xi = f >> 16;
 903                 if (xi != oldx)
 904                 {
 905                         in += (xi - oldx) * 3;
 906                         oldx = xi;
 907                 }
 908                 if (xi < endx)
 909                 {
 910                         lerp = f & 0xFFFF;
 911                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
 912                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
 913                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
 914                 }
 915                 else // last pixel of the line has no pixel to lerp to
 916                 {
 917                         *out++ = in[0];
 918                         *out++ = in[1];
 919                         *out++ = in[2];
 920                 }
 921         }
 922 }
 923
 924 int resamplerowsize = 0;
 925 qbyte *resamplerow1 = NULL;
 926 qbyte *resamplerow2 = NULL;
 927 mempool_t *resamplemempool = NULL;
 928
 929 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
 930 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
 931 {
 932         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
 933         qbyte *out;
 934         const qbyte *inrow;
 935         out = outdata;
 936         fstep = (int) (inheight*65536.0f/outheight);
 937
 938         inrow = indata;
 939         oldy = 0;
 940         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 941         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 942         for (i = 0, f = 0;i < outheight;i++,f += fstep)
 943         {
 944                 yi = f >> 16;
 945                 if (yi < endy)
 946                 {
 947                         lerp = f & 0xFFFF;
 948                         if (yi != oldy)
 949                         {
 950                                 inrow = (qbyte *)indata + inwidth4*yi;
 951                                 if (yi == oldy+1)
 952                                         memcpy(resamplerow1, resamplerow2, outwidth4);
 953                                 else
 954                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
 955                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
 956                                 oldy = yi;
 957                         }
 958                         j = outwidth - 4;
 959                         while(j >= 0)
 960                         {
 961                                 LERPBYTE( 0);
 962                                 LERPBYTE( 1);
 963                                 LERPBYTE( 2);
 964                                 LERPBYTE( 3);
 965                                 LERPBYTE( 4);
 966                                 LERPBYTE( 5);
 967                                 LERPBYTE( 6);
 968                                 LERPBYTE( 7);
 969                                 LERPBYTE( 8);
 970                                 LERPBYTE( 9);
 971                                 LERPBYTE(10);
 972                                 LERPBYTE(11);
 973                                 LERPBYTE(12);
 974                                 LERPBYTE(13);
 975                                 LERPBYTE(14);
 976                                 LERPBYTE(15);
 977                                 out += 16;
 978                                 resamplerow1 += 16;
 979                                 resamplerow2 += 16;
 980                                 j -= 4;
 981                         }
 982                         if (j & 2)
 983                         {
 984                                 LERPBYTE( 0);
 985                                 LERPBYTE( 1);
 986                                 LERPBYTE( 2);
 987                                 LERPBYTE( 3);
 988                                 LERPBYTE( 4);
 989                                 LERPBYTE( 5);
 990                                 LERPBYTE( 6);
 991                                 LERPBYTE( 7);
 992                                 out += 8;
 993                                 resamplerow1 += 8;
 994                                 resamplerow2 += 8;
 995                         }
 996                         if (j & 1)
 997                         {
 998                                 LERPBYTE( 0);
 999                                 LERPBYTE( 1);
1000                                 LERPBYTE( 2);
1001                                 LERPBYTE( 3);
1002                                 out += 4;
1003                                 resamplerow1 += 4;
1004                                 resamplerow2 += 4;
1005                         }
1006                         resamplerow1 -= outwidth4;
1007                         resamplerow2 -= outwidth4;
1008                 }
1009                 else
1010                 {
1011                         if (yi != oldy)
1012                         {
1013                                 inrow = (qbyte *)indata + inwidth4*yi;
1014                                 if (yi == oldy+1)
1015                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1016                                 else
1017                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1018                                 oldy = yi;
1019                         }
1020                         memcpy(out, resamplerow1, outwidth4);
1021                 }
1022         }
1023 }
1024
1025 void Image_Resample32Nearest(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1026 {
1027         int i, j;
1028         unsigned frac, fracstep;
1029         // relies on int being 4 bytes
1030         int *inrow, *out;
1031         out = outdata;
1032
1033         fracstep = inwidth*0x10000/outwidth;
1034         for (i = 0;i < outheight;i++)
1035         {
1036                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1037                 frac = fracstep >> 1;
1038                 j = outwidth - 4;
1039                 while (j >= 0)
1040                 {
1041                         out[0] = inrow[frac >> 16];frac += fracstep;
1042                         out[1] = inrow[frac >> 16];frac += fracstep;
1043                         out[2] = inrow[frac >> 16];frac += fracstep;
1044                         out[3] = inrow[frac >> 16];frac += fracstep;
1045                         out += 4;
1046                         j -= 4;
1047                 }
1048                 if (j & 2)
1049                 {
1050                         out[0] = inrow[frac >> 16];frac += fracstep;
1051                         out[1] = inrow[frac >> 16];frac += fracstep;
1052                         out += 2;
1053                 }
1054                 if (j & 1)
1055                 {
1056                         out[0] = inrow[frac >> 16];frac += fracstep;
1057                         out += 1;
1058                 }
1059         }
1060 }
1061
1062 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1063 {
1064         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1065         qbyte *out;
1066         const qbyte *inrow;
1067         out = outdata;
1068         fstep = (int) (inheight*65536.0f/outheight);
1069
1070         inrow = indata;
1071         oldy = 0;
1072         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1073         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1074         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1075         {
1076                 yi = f >> 16;
1077                 if (yi < endy)
1078                 {
1079                         lerp = f & 0xFFFF;
1080                         if (yi != oldy)
1081                         {
1082                                 inrow = (qbyte *)indata + inwidth3*yi;
1083                                 if (yi == oldy+1)
1084                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1085                                 else
1086                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1087                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1088                                 oldy = yi;
1089                         }
1090                         j = outwidth - 4;
1091                         while(j >= 0)
1092                         {
1093                                 LERPBYTE( 0);
1094                                 LERPBYTE( 1);
1095                                 LERPBYTE( 2);
1096                                 LERPBYTE( 3);
1097                                 LERPBYTE( 4);
1098                                 LERPBYTE( 5);
1099                                 LERPBYTE( 6);
1100                                 LERPBYTE( 7);
1101                                 LERPBYTE( 8);
1102                                 LERPBYTE( 9);
1103                                 LERPBYTE(10);
1104                                 LERPBYTE(11);
1105                                 out += 12;
1106                                 resamplerow1 += 12;
1107                                 resamplerow2 += 12;
1108                                 j -= 4;
1109                         }
1110                         if (j & 2)
1111                         {
1112                                 LERPBYTE( 0);
1113                                 LERPBYTE( 1);
1114                                 LERPBYTE( 2);
1115                                 LERPBYTE( 3);
1116                                 LERPBYTE( 4);
1117                                 LERPBYTE( 5);
1118                                 out += 6;
1119                                 resamplerow1 += 6;
1120                                 resamplerow2 += 6;
1121                         }
1122                         if (j & 1)
1123                         {
1124                                 LERPBYTE( 0);
1125                                 LERPBYTE( 1);
1126                                 LERPBYTE( 2);
1127                                 out += 3;
1128                                 resamplerow1 += 3;
1129                                 resamplerow2 += 3;
1130                         }
1131                         resamplerow1 -= outwidth3;
1132                         resamplerow2 -= outwidth3;
1133                 }
1134                 else
1135                 {
1136                         if (yi != oldy)
1137                         {
1138                                 inrow = (qbyte *)indata + inwidth3*yi;
1139                                 if (yi == oldy+1)
1140                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1141                                 else
1142                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1143                                 oldy = yi;
1144                         }
1145                         memcpy(out, resamplerow1, outwidth3);
1146                 }
1147         }
1148 }
1149
1150 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1151 {
1152         int i, j, f, inwidth3 = inwidth * 3;
1153         unsigned frac, fracstep;
1154         qbyte *inrow, *out;
1155         out = outdata;
1156
1157         fracstep = inwidth*0x10000/outwidth;
1158         for (i = 0;i < outheight;i++)
1159         {
1160                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1161                 frac = fracstep >> 1;
1162                 j = outwidth - 4;
1163                 while (j >= 0)
1164                 {
1165                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1166                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1167                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1168                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1169                         j -= 4;
1170                 }
1171                 if (j & 2)
1172                 {
1173                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1174                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1175                         out += 2;
1176                 }
1177                 if (j & 1)
1178                 {
1179                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1180                         out += 1;
1181                 }
1182         }
1183 }
1184
1185 /*
1186 ================
1187 Image_Resample
1188 ================
1189 */
1190 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1191 {
1192         if (indepth != 1 || outdepth != 1)
1193                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1194         if (resamplerowsize < outwidth*4)
1195         {
1196                 if (resamplerow1)
1197                         Mem_Free(resamplerow1);
1198                 resamplerowsize = outwidth*4;
1199                 if (!resamplemempool)
1200                         resamplemempool = Mem_AllocPool("Image Scaling Buffer");
1201                 resamplerow1 = Mem_Alloc(resamplemempool, resamplerowsize*2);
1202                 resamplerow2 = resamplerow1 + resamplerowsize;
1203         }
1204         if (bytesperpixel == 4)
1205         {
1206                 if (quality)
1207                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1208                 else
1209                         Image_Resample32Nearest(indata, inwidth, inheight, outdata, outwidth, outheight);
1210         }
1211         else if (bytesperpixel == 3)
1212         {
1213                 if (quality)
1214                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1215                 else
1216                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1217         }
1218         else
1219                 Sys_Error("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1220 }
1221
1222 // in can be the same as out
1223 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1224 {
1225         int x, y, nextrow;
1226         if (*depth != 1 || destdepth != 1)
1227                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1228         nextrow = *width * bytesperpixel;
1229         if (*width > destwidth)
1230         {
1231                 *width >>= 1;
1232                 if (*height > destheight)
1233                 {
1234                         // reduce both
1235                         *height >>= 1;
1236                         if (bytesperpixel == 4)
1237                         {
1238                                 for (y = 0;y < *height;y++)
1239                                 {
1240                                         for (x = 0;x < *width;x++)
1241                                         {
1242                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1243                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1244                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1245                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1246                                                 out += 4;
1247                                                 in += 8;
1248                                         }
1249                                         in += nextrow; // skip a line
1250                                 }
1251                         }
1252                         else if (bytesperpixel == 3)
1253                         {
1254                                 for (y = 0;y < *height;y++)
1255                                 {
1256                                         for (x = 0;x < *width;x++)
1257                                         {
1258                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1259                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1260                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1261                                                 out += 3;
1262                                                 in += 6;
1263                                         }
1264                                         in += nextrow; // skip a line
1265                                 }
1266                         }
1267                         else
1268                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1269                 }
1270                 else
1271                 {
1272                         // reduce width
1273                         if (bytesperpixel == 4)
1274                         {
1275                                 for (y = 0;y < *height;y++)
1276                                 {
1277                                         for (x = 0;x < *width;x++)
1278                                         {
1279                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1280                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1281                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1282                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1283                                                 out += 4;
1284                                                 in += 8;
1285                                         }
1286                                 }
1287                         }
1288                         else if (bytesperpixel == 3)
1289                         {
1290                                 for (y = 0;y < *height;y++)
1291                                 {
1292                                         for (x = 0;x < *width;x++)
1293                                         {
1294                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1295                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1296                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1297                                                 out += 3;
1298                                                 in += 6;
1299                                         }
1300                                 }
1301                         }
1302                         else
1303                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1304                 }
1305         }
1306         else
1307         {
1308                 if (*height > destheight)
1309                 {
1310                         // reduce height
1311                         *height >>= 1;
1312                         if (bytesperpixel == 4)
1313                         {
1314                                 for (y = 0;y < *height;y++)
1315                                 {
1316                                         for (x = 0;x < *width;x++)
1317                                         {
1318                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1319                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1320                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1321                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1322                                                 out += 4;
1323                                                 in += 4;
1324                                         }
1325                                         in += nextrow; // skip a line
1326                                 }
1327                         }
1328                         else if (bytesperpixel == 3)
1329                         {
1330                                 for (y = 0;y < *height;y++)
1331                                 {
1332                                         for (x = 0;x < *width;x++)
1333                                         {
1334                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1335                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1336                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1337                                                 out += 3;
1338                                                 in += 3;
1339                                         }
1340                                         in += nextrow; // skip a line
1341                                 }
1342                         }
1343                         else
1344                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1345                 }
1346                 else
1347                         Sys_Error("Image_MipReduce: desired size already achieved\n");
1348         }
1349 }
1350
1351 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1352 {
1353         int x, y;
1354         const unsigned char *p0, *p1, *p2;
1355         unsigned char *out;
1356         float iwidth, iheight, ibumpscale, n[3];
1357         iwidth = 1.0f / width;
1358         iheight = 1.0f / height;
1359         ibumpscale = (255.0f * 3.0f) / bumpscale;
1360         out = outpixels;
1361         for (y = 0;y < height;y++)
1362         {
1363                 for (x = 0;x < width;x++)
1364                 {
1365                         p0 = inpixels + (y * width + x) * 4;
1366                         if (x == width - 1)
1367                         {
1368                                 if (clamp)
1369                                         p1 = inpixels + (y * width + x) * 4;
1370                                 else
1371                                         p1 = inpixels + (y * width) * 4;
1372                         }
1373                         else
1374                                 p1 = inpixels + (y * width + x + 1) * 4;
1375                         if (y == height - 1)
1376                         {
1377                                 if (clamp)
1378                                         p2 = inpixels + (y * width + x) * 4;
1379                                 else
1380                                         p2 = inpixels + x * 4;
1381                         }
1382                         else
1383                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1384                         /*
1385                         dv[0][0] = iwidth;
1386                         dv[0][1] = 0;
1387                         dv[0][2] = ((p1[0] + p1[1] + p1[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1388                         dv[1][0] = 0;
1389                         dv[1][1] = iheight;
1390                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1391                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1392                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1393                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1394                         */
1395                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1396                         n[1] = ((p0[0] + p0[1] + p0[2]) - (p2[0] + p2[1] + p2[2]));
1397                         n[2] = ibumpscale;
1398                         VectorNormalize(n);
1399                         out[0] = 128.0f + n[0] * 127.0f;
1400                         out[1] = 128.0f + n[1] * 127.0f;
1401                         out[2] = 128.0f + n[2] * 127.0f;
1402                         out[3] = 255;
1403                         out += 4;
1404                 }
1405         }
1406 }
1407
1408 int image_loadskin(imageskin_t *s, char *name)
1409 {
1410         int j;
1411         qbyte *bumppixels;
1412         int bumppixels_width, bumppixels_height;
1413         memset(s, 0, sizeof(*s));
1414         s->basepixels = loadimagepixels(name, false, 0, 0);
1415         if (s->basepixels == NULL)
1416                 return false;
1417
1418         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1419         for (j = 3;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1420                 if (s->basepixels[j] < 255)
1421                         break;
1422         if (j < s->basepixels_width * s->basepixels_height * 4)
1423         {
1424                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1425                 s->maskpixels_width = s->basepixels_width;
1426                 s->maskpixels_height = s->basepixels_height;
1427                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1428                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1429                 {
1430                         s->maskpixels[j+0] = 255;
1431                         s->maskpixels[j+1] = 255;
1432                         s->maskpixels[j+2] = 255;
1433                 }
1434         }
1435
1436         // _luma is supported for tenebrae compatibility
1437         // (I think it's a very stupid name, but oh well)
1438         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1439          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1440         {
1441                 s->glowpixels_width = image_width;
1442                 s->glowpixels_height = image_height;
1443         }
1444         // _norm is the name used by tenebrae
1445         // (I don't like the name much)
1446         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1447         {
1448                 s->nmappixels_width = image_width;
1449                 s->nmappixels_height = image_height;
1450         }
1451         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1452         {
1453                 bumppixels_width = image_width;
1454                 bumppixels_height = image_height;
1455         }
1456         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1457         {
1458                 s->glosspixels_width = image_width;
1459                 s->glosspixels_height = image_height;
1460         }
1461         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1462         {
1463                 s->pantspixels_width = image_width;
1464                 s->pantspixels_height = image_height;
1465         }
1466         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1467         {
1468                 s->shirtpixels_width = image_width;
1469                 s->shirtpixels_height = image_height;
1470         }
1471
1472         if (s->nmappixels == NULL)
1473         {
1474                 if (bumppixels != NULL)
1475                 {
1476                         if (r_shadow_bumpscale_bumpmap.value > 0)
1477                         {
1478                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1479                                 s->nmappixels_width = bumppixels_width;
1480                                 s->nmappixels_height = bumppixels_height;
1481                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1482                         }
1483                 }
1484                 else
1485                 {
1486                         if (r_shadow_bumpscale_basetexture.value > 0)
1487                         {
1488                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1489                                 s->nmappixels_width = s->basepixels_width;
1490                                 s->nmappixels_height = s->basepixels_height;
1491                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1492                         }
1493                 }
1494         }
1495         if (bumppixels != NULL)
1496                 Mem_Free(bumppixels);
1497         return true;
1498 }
1499
1500 void image_freeskin(imageskin_t *s)
1501 {
1502         if (s->basepixels)
1503                 Mem_Free(s->basepixels);
1504         if (s->nmappixels)
1505                 Mem_Free(s->nmappixels);
1506         if (s->glowpixels)
1507                 Mem_Free(s->glowpixels);
1508         if (s->glosspixels)
1509                 Mem_Free(s->glosspixels);
1510         if (s->pantspixels)
1511                 Mem_Free(s->pantspixels);
1512         if (s->shirtpixels)
1513                 Mem_Free(s->shirtpixels);
1514         memset(s, 0, sizeof(*s));
1515 }
1516