image.c

   1
   2 #include "quakedef.h"
   3 #include "image.h"
   4 #include "jpeg.h"
   5 #include "image_png.h"
   6 #include "r_shadow.h"
   7
   8 int             image_width;
   9 int             image_height;
  10
  11 static void Image_CopyAlphaFromBlueBGRA(unsigned char *outpixels, const unsigned char *inpixels, int w, int h)
  12 {
  13         int i, n;
  14         n = w * h;
  15         for(i = 0; i < n; ++i)
  16                 outpixels[4*i+3] = inpixels[4*i]; // blue channel
  17 }
  18
  19 #if 1
  20 // written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
  21 void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  22 {
  23         int index, c, x, y;
  24         const unsigned char *in, *line;
  25         int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
  26         int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);
  27
  28         for (c = 0; c < numoutputcomponents; c++)
  29                 if (outputinputcomponentindices[c] & 0x80000000)
  30                         break;
  31         if (c < numoutputcomponents)
  32         {
  33                 // special indices used
  34                 if (inputflipdiagonal)
  35                 {
  36                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  37                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numoutputcomponents)
  38                                         for (c = 0; c < numoutputcomponents; c++)
  39                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  40                 }
  41                 else
  42                 {
  43                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  44                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numoutputcomponents)
  45                                         for (c = 0; c < numoutputcomponents; c++)
  46                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
  47                 }
  48         }
  49         else
  50         {
  51                 // special indices not used
  52                 if (inputflipdiagonal)
  53                 {
  54                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
  55                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numoutputcomponents)
  56                                         for (c = 0; c < numoutputcomponents; c++)
  57                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  58                 }
  59                 else
  60                 {
  61                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
  62                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numoutputcomponents)
  63                                         for (c = 0; c < numoutputcomponents; c++)
  64                                                 outpixels[c] = in[outputinputcomponentindices[c]];
  65                 }
  66         }
  67 }
  68 #else
  69 // intentionally readable version
  70 void Image_CopyMux(unsigned char *outpixels, const unsigned char *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
  71 {
  72         int index, c, x, y;
  73         const unsigned char *in, *inrow, *incolumn;
  74         if (inputflipdiagonal)
  75         {
  76                 for (x = 0;x < inputwidth;x++)
  77                 {
  78                         for (y = 0;y < inputheight;y++)
  79                         {
  80                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  81                                 for (c = 0;c < numoutputcomponents;c++)
  82                                 {
  83                                         index = outputinputcomponentindices[c];
  84                                         if (index & 0x80000000)
  85                                                 *outpixels++ = index;
  86                                         else
  87                                                 *outpixels++ = in[index];
  88                                 }
  89                         }
  90                 }
  91         }
  92         else
  93         {
  94                 for (y = 0;y < inputheight;y++)
  95                 {
  96                         for (x = 0;x < inputwidth;x++)
  97                         {
  98                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
  99                                 for (c = 0;c < numoutputcomponents;c++)
 100                                 {
 101                                         index = outputinputcomponentindices[c];
 102                                         if (index & 0x80000000)
 103                                                 *outpixels++ = index;
 104                                         else
 105                                                 *outpixels++ = in[index];
 106                                 }
 107                         }
 108                 }
 109         }
 110 }
 111 #endif
 112
 113 void Image_GammaRemapRGB(const unsigned char *in, unsigned char *out, int pixels, const unsigned char *gammar, const unsigned char *gammag, const unsigned char *gammab)
 114 {
 115         while (pixels--)
 116         {
 117                 out[0] = gammar[in[0]];
 118                 out[1] = gammag[in[1]];
 119                 out[2] = gammab[in[2]];
 120                 in += 3;
 121                 out += 3;
 122         }
 123 }
 124
 125 // note: pal must be 32bit color
 126 void Image_Copy8bitBGRA(const unsigned char *in, unsigned char *out, int pixels, const unsigned int *pal)
 127 {
 128         int *iout = (int *)out;
 129         while (pixels >= 8)
 130         {
 131                 iout[0] = pal[in[0]];
 132                 iout[1] = pal[in[1]];
 133                 iout[2] = pal[in[2]];
 134                 iout[3] = pal[in[3]];
 135                 iout[4] = pal[in[4]];
 136                 iout[5] = pal[in[5]];
 137                 iout[6] = pal[in[6]];
 138                 iout[7] = pal[in[7]];
 139                 in += 8;
 140                 iout += 8;
 141                 pixels -= 8;
 142         }
 143         if (pixels & 4)
 144         {
 145                 iout[0] = pal[in[0]];
 146                 iout[1] = pal[in[1]];
 147                 iout[2] = pal[in[2]];
 148                 iout[3] = pal[in[3]];
 149                 in += 4;
 150                 iout += 4;
 151         }
 152         if (pixels & 2)
 153         {
 154                 iout[0] = pal[in[0]];
 155                 iout[1] = pal[in[1]];
 156                 in += 2;
 157                 iout += 2;
 158         }
 159         if (pixels & 1)
 160                 iout[0] = pal[in[0]];
 161 }
 162
 163 /*
 164 =================================================================
 165
 166   PCX Loading
 167
 168 =================================================================
 169 */
 170
 171 typedef struct pcx_s
 172 {
 173     char        manufacturer;
 174     char        version;
 175     char        encoding;
 176     char        bits_per_pixel;
 177     unsigned short      xmin,ymin,xmax,ymax;
 178     unsigned short      hres,vres;
 179     unsigned char       palette[48];
 180     char        reserved;
 181     char        color_planes;
 182     unsigned short      bytes_per_line;
 183     unsigned short      palette_type;
 184     char        filler[58];
 185 } pcx_t;
 186
 187 /*
 188 ============
 189 LoadPCX
 190 ============
 191 */
 192 static unsigned char* LoadPCX_BGRA (const unsigned char *f, int filesize, int *miplevel)
 193 {
 194         pcx_t pcx;
 195         unsigned char *a, *b, *image_buffer, *pbuf;
 196         const unsigned char *palette, *fin, *enddata;
 197         int x, y, x2, dataByte;
 198
 199         if (filesize < (int)sizeof(pcx) + 768)
 200         {
 201                 Con_Print("Bad pcx file\n");
 202                 return NULL;
 203         }
 204
 205         fin = f;
 206
 207         memcpy(&pcx, fin, sizeof(pcx));
 208         fin += sizeof(pcx);
 209
 210         // LordHavoc: big-endian support ported from QF newtree
 211         pcx.xmax = LittleShort (pcx.xmax);
 212         pcx.xmin = LittleShort (pcx.xmin);
 213         pcx.ymax = LittleShort (pcx.ymax);
 214         pcx.ymin = LittleShort (pcx.ymin);
 215         pcx.hres = LittleShort (pcx.hres);
 216         pcx.vres = LittleShort (pcx.vres);
 217         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 218         pcx.palette_type = LittleShort (pcx.palette_type);
 219
 220         image_width = pcx.xmax + 1 - pcx.xmin;
 221         image_height = pcx.ymax + 1 - pcx.ymin;
 222         if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
 223         {
 224                 Con_Print("Bad pcx file\n");
 225                 return NULL;
 226         }
 227
 228         palette = f + filesize - 768;
 229
 230         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
 231         if (!image_buffer)
 232         {
 233                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
 234                 return NULL;
 235         }
 236         pbuf = image_buffer + image_width*image_height*3;
 237         enddata = palette;
 238
 239         for (y = 0;y < image_height && fin < enddata;y++)
 240         {
 241                 a = pbuf + y * image_width;
 242                 for (x = 0;x < image_width && fin < enddata;)
 243                 {
 244                         dataByte = *fin++;
 245                         if(dataByte >= 0xC0)
 246                         {
 247                                 if (fin >= enddata)
 248                                         break;
 249                                 x2 = x + (dataByte & 0x3F);
 250                                 dataByte = *fin++;
 251                                 if (x2 > image_width)
 252                                         x2 = image_width; // technically an error
 253                                 while(x < x2)
 254                                         a[x++] = dataByte;
 255                         }
 256                         else
 257                                 a[x++] = dataByte;
 258                 }
 259                 while(x < image_width)
 260                         a[x++] = 0;
 261         }
 262
 263         a = image_buffer;
 264         b = pbuf;
 265
 266         for(x = 0;x < image_width*image_height;x++)
 267         {
 268                 y = *b++ * 3;
 269                 *a++ = palette[y+2];
 270                 *a++ = palette[y+1];
 271                 *a++ = palette[y];
 272                 *a++ = 255;
 273         }
 274
 275         return image_buffer;
 276 }
 277
 278 /*
 279 ============
 280 LoadPCX
 281 ============
 282 */
 283 qboolean LoadPCX_QWSkin(const unsigned char *f, int filesize, unsigned char *pixels, int outwidth, int outheight)
 284 {
 285         pcx_t pcx;
 286         unsigned char *a;
 287         const unsigned char *fin, *enddata;
 288         int x, y, x2, dataByte, pcxwidth, pcxheight;
 289
 290         if (filesize < (int)sizeof(pcx) + 768)
 291                 return false;
 292
 293         image_width = outwidth;
 294         image_height = outheight;
 295         fin = f;
 296
 297         memcpy(&pcx, fin, sizeof(pcx));
 298         fin += sizeof(pcx);
 299
 300         // LordHavoc: big-endian support ported from QF newtree
 301         pcx.xmax = LittleShort (pcx.xmax);
 302         pcx.xmin = LittleShort (pcx.xmin);
 303         pcx.ymax = LittleShort (pcx.ymax);
 304         pcx.ymin = LittleShort (pcx.ymin);
 305         pcx.hres = LittleShort (pcx.hres);
 306         pcx.vres = LittleShort (pcx.vres);
 307         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
 308         pcx.palette_type = LittleShort (pcx.palette_type);
 309
 310         pcxwidth = pcx.xmax + 1 - pcx.xmin;
 311         pcxheight = pcx.ymax + 1 - pcx.ymin;
 312         if (pcx.manufacturer != 0x0a || pcx.version != 5 || pcx.encoding != 1 || pcx.bits_per_pixel != 8 || pcxwidth > 4096 || pcxheight > 4096 || pcxwidth <= 0 || pcxheight <= 0)
 313                 return false;
 314
 315         enddata = f + filesize - 768;
 316
 317         for (y = 0;y < outheight && fin < enddata;y++)
 318         {
 319                 a = pixels + y * outwidth;
 320                 // pad the output with blank lines if needed
 321                 if (y >= pcxheight)
 322                 {
 323                         memset(a, 0, outwidth);
 324                         continue;
 325                 }
 326                 for (x = 0;x < pcxwidth;)
 327                 {
 328                         if (fin >= enddata)
 329                                 return false;
 330                         dataByte = *fin++;
 331                         if(dataByte >= 0xC0)
 332                         {
 333                                 x2 = x + (dataByte & 0x3F);
 334                                 if (fin >= enddata)
 335                                         return false;
 336                                 if (x2 > pcxwidth)
 337                                         return false;
 338                                 dataByte = *fin++;
 339                                 for (;x < x2;x++)
 340                                         if (x < outwidth)
 341                                                 a[x] = dataByte;
 342                         }
 343                         else
 344                         {
 345                                 if (x < outwidth) // truncate to destination width
 346                                         a[x] = dataByte;
 347                                 x++;
 348                         }
 349                 }
 350                 while(x < outwidth)
 351                         a[x++] = 0;
 352         }
 353
 354         return true;
 355 }
 356
 357 /*
 358 ============
 359 LoadPCX
 360 ============
 361 */
 362 qboolean LoadPCX_PaletteOnly(const unsigned char *f, int filesize, unsigned char *palette768b)
 363 {
 364         if (filesize < 768)
 365                 return false;
 366         memcpy(palette768b, f + filesize - 768, 768);
 367         return true;
 368 }
 369
 370 /*
 371 =========================================================
 372
 373 TARGA LOADING
 374
 375 =========================================================
 376 */
 377
 378 typedef struct _TargaHeader
 379 {
 380         unsigned char   id_length, colormap_type, image_type;
 381         unsigned short  colormap_index, colormap_length;
 382         unsigned char   colormap_size;
 383         unsigned short  x_origin, y_origin, width, height;
 384         unsigned char   pixel_size, attributes;
 385 }
 386 TargaHeader;
 387
 388 static void PrintTargaHeader(TargaHeader *t)
 389 {
 390         Con_Printf("TargaHeader:\nuint8 id_length = %i;\nuint8 colormap_type = %i;\nuint8 image_type = %i;\nuint16 colormap_index = %i;\nuint16 colormap_length = %i;\nuint8 colormap_size = %i;\nuint16 x_origin = %i;\nuint16 y_origin = %i;\nuint16 width = %i;\nuint16 height = %i;\nuint8 pixel_size = %i;\nuint8 attributes = %i;\n", t->id_length, t->colormap_type, t->image_type, t->colormap_index, t->colormap_length, t->colormap_size, t->x_origin, t->y_origin, t->width, t->height, t->pixel_size, t->attributes);
 391 }
 392
 393 /*
 394 =============
 395 LoadTGA
 396 =============
 397 */
 398 unsigned char *LoadTGA_BGRA (const unsigned char *f, int filesize, int *miplevel)
 399 {
 400         int x, y, pix_inc, row_inci, runlen, alphabits;
 401         unsigned char *image_buffer;
 402         unsigned int *pixbufi;
 403         const unsigned char *fin, *enddata;
 404         TargaHeader targa_header;
 405         unsigned int palettei[256];
 406         union
 407         {
 408                 unsigned int i;
 409                 unsigned char b[4];
 410         }
 411         bgra;
 412
 413         if (filesize < 19)
 414                 return NULL;
 415
 416         enddata = f + filesize;
 417
 418         targa_header.id_length = f[0];
 419         targa_header.colormap_type = f[1];
 420         targa_header.image_type = f[2];
 421
 422         targa_header.colormap_index = f[3] + f[4] * 256;
 423         targa_header.colormap_length = f[5] + f[6] * 256;
 424         targa_header.colormap_size = f[7];
 425         targa_header.x_origin = f[8] + f[9] * 256;
 426         targa_header.y_origin = f[10] + f[11] * 256;
 427         targa_header.width = image_width = f[12] + f[13] * 256;
 428         targa_header.height = image_height = f[14] + f[15] * 256;
 429         targa_header.pixel_size = f[16];
 430         targa_header.attributes = f[17];
 431
 432         if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
 433         {
 434                 Con_Print("LoadTGA: invalid size\n");
 435                 PrintTargaHeader(&targa_header);
 436                 return NULL;
 437         }
 438
 439         memset(palettei, 0, sizeof(palettei));
 440
 441         // advance to end of header
 442         fin = f + 18;
 443
 444         // skip TARGA image comment (usually 0 bytes)
 445         fin += targa_header.id_length;
 446
 447         // read/skip the colormap if present (note: according to the TARGA spec it
 448         // can be present even on truecolor or greyscale images, just not used by
 449         // the image data)
 450         if (targa_header.colormap_type)
 451         {
 452                 if (targa_header.colormap_length > 256)
 453                 {
 454                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
 455                         PrintTargaHeader(&targa_header);
 456                         return NULL;
 457                 }
 458                 if (targa_header.colormap_index)
 459                 {
 460                         Con_Print("LoadTGA: colormap_index not supported\n");
 461                         PrintTargaHeader(&targa_header);
 462                         return NULL;
 463                 }
 464                 if (targa_header.colormap_size == 24)
 465                 {
 466                         for (x = 0;x < targa_header.colormap_length;x++)
 467                         {
 468                                 bgra.b[0] = *fin++;
 469                                 bgra.b[1] = *fin++;
 470                                 bgra.b[2] = *fin++;
 471                                 bgra.b[3] = 255;
 472                                 palettei[x] = bgra.i;
 473                         }
 474                 }
 475                 else if (targa_header.colormap_size == 32)
 476                 {
 477                         memcpy(palettei, fin, targa_header.colormap_length*4);
 478                         fin += targa_header.colormap_length * 4;
 479                 }
 480                 else
 481                 {
 482                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
 483                         PrintTargaHeader(&targa_header);
 484                         return NULL;
 485                 }
 486         }
 487
 488         // check our pixel_size restrictions according to image_type
 489         switch (targa_header.image_type & ~8)
 490         {
 491         case 2:
 492                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
 493                 {
 494                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
 495                         PrintTargaHeader(&targa_header);
 496                         return NULL;
 497                 }
 498                 break;
 499         case 3:
 500                 // set up a palette to make the loader easier
 501                 for (x = 0;x < 256;x++)
 502                 {
 503                         bgra.b[0] = bgra.b[1] = bgra.b[2] = x;
 504                         bgra.b[3] = 255;
 505                         palettei[x] = bgra.i;
 506                 }
 507                 // fall through to colormap case
 508         case 1:
 509                 if (targa_header.pixel_size != 8)
 510                 {
 511                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
 512                         PrintTargaHeader(&targa_header);
 513                         return NULL;
 514                 }
 515                 break;
 516         default:
 517                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
 518                 PrintTargaHeader(&targa_header);
 519                 return NULL;
 520         }
 521
 522         if (targa_header.attributes & 0x10)
 523         {
 524                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
 525                 return NULL;
 526         }
 527
 528         // number of attribute bits per pixel, we only support 0 or 8
 529         alphabits = targa_header.attributes & 0x0F;
 530         if (alphabits != 8 && alphabits != 0)
 531         {
 532                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
 533                 return NULL;
 534         }
 535
 536         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 537         if (!image_buffer)
 538         {
 539                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
 540                 return NULL;
 541         }
 542
 543         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
 544         if ((targa_header.attributes & 0x20) == 0)
 545         {
 546                 pixbufi = (unsigned int*)image_buffer + (image_height - 1)*image_width;
 547                 row_inci = -image_width*2;
 548         }
 549         else
 550         {
 551                 pixbufi = (unsigned int*)image_buffer;
 552                 row_inci = 0;
 553         }
 554
 555         pix_inc = 1;
 556         if ((targa_header.image_type & ~8) == 2)
 557                 pix_inc = (targa_header.pixel_size + 7) / 8;
 558         switch (targa_header.image_type)
 559         {
 560         case 1: // colormapped, uncompressed
 561         case 3: // greyscale, uncompressed
 562                 if (fin + image_width * image_height * pix_inc > enddata)
 563                         break;
 564                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
 565                         for (x = 0;x < image_width;x++)
 566                                 *pixbufi++ = palettei[*fin++];
 567                 break;
 568         case 2:
 569                 // BGR or BGRA, uncompressed
 570                 if (fin + image_width * image_height * pix_inc > enddata)
 571                         break;
 572                 if (targa_header.pixel_size == 32 && alphabits)
 573                 {
 574                         for (y = 0;y < image_height;y++)
 575                                 memcpy(pixbufi + y * (image_width + row_inci), fin + y * image_width * pix_inc, image_width*4);
 576                 }
 577                 else
 578                 {
 579                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 580                         {
 581                                 for (x = 0;x < image_width;x++, fin += pix_inc)
 582                                 {
 583                                         bgra.b[0] = fin[0];
 584                                         bgra.b[1] = fin[1];
 585                                         bgra.b[2] = fin[2];
 586                                         bgra.b[3] = 255;
 587                                         *pixbufi++ = bgra.i;
 588                                 }
 589                         }
 590                 }
 591                 break;
 592         case 9: // colormapped, RLE
 593         case 11: // greyscale, RLE
 594                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
 595                 {
 596                         for (x = 0;x < image_width;)
 597                         {
 598                                 if (fin >= enddata)
 599                                         break; // error - truncated file
 600                                 runlen = *fin++;
 601                                 if (runlen & 0x80)
 602                                 {
 603                                         // RLE - all pixels the same color
 604                                         runlen += 1 - 0x80;
 605                                         if (fin + pix_inc > enddata)
 606                                                 break; // error - truncated file
 607                                         if (x + runlen > image_width)
 608                                                 break; // error - line exceeds width
 609                                         bgra.i = palettei[*fin++];
 610                                         for (;runlen--;x++)
 611                                                 *pixbufi++ = bgra.i;
 612                                 }
 613                                 else
 614                                 {
 615                                         // uncompressed - all pixels different color
 616                                         runlen++;
 617                                         if (fin + pix_inc * runlen > enddata)
 618                                                 break; // error - truncated file
 619                                         if (x + runlen > image_width)
 620                                                 break; // error - line exceeds width
 621                                         for (;runlen--;x++)
 622                                                 *pixbufi++ = palettei[*fin++];
 623                                 }
 624                         }
 625
 626                         if (x != image_width)
 627                         {
 628                                 // pixbufi is useless now
 629                                 Con_Printf("LoadTGA: corrupt file\n");
 630                                 break;
 631                         }
 632                 }
 633                 break;
 634         case 10:
 635                 // BGR or BGRA, RLE
 636                 if (targa_header.pixel_size == 32 && alphabits)
 637                 {
 638                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 639                         {
 640                                 for (x = 0;x < image_width;)
 641                                 {
 642                                         if (fin >= enddata)
 643                                                 break; // error - truncated file
 644                                         runlen = *fin++;
 645                                         if (runlen & 0x80)
 646                                         {
 647                                                 // RLE - all pixels the same color
 648                                                 runlen += 1 - 0x80;
 649                                                 if (fin + pix_inc > enddata)
 650                                                         break; // error - truncated file
 651                                                 if (x + runlen > image_width)
 652                                                         break; // error - line exceeds width
 653                                                 bgra.b[0] = fin[0];
 654                                                 bgra.b[1] = fin[1];
 655                                                 bgra.b[2] = fin[2];
 656                                                 bgra.b[3] = fin[3];
 657                                                 fin += pix_inc;
 658                                                 for (;runlen--;x++)
 659                                                         *pixbufi++ = bgra.i;
 660                                         }
 661                                         else
 662                                         {
 663                                                 // uncompressed - all pixels different color
 664                                                 runlen++;
 665                                                 if (fin + pix_inc * runlen > enddata)
 666                                                         break; // error - truncated file
 667                                                 if (x + runlen > image_width)
 668                                                         break; // error - line exceeds width
 669                                                 for (;runlen--;x++)
 670                                                 {
 671                                                         bgra.b[0] = fin[0];
 672                                                         bgra.b[1] = fin[1];
 673                                                         bgra.b[2] = fin[2];
 674                                                         bgra.b[3] = fin[3];
 675                                                         fin += pix_inc;
 676                                                         *pixbufi++ = bgra.i;
 677                                                 }
 678                                         }
 679                                 }
 680
 681                                 if (x != image_width)
 682                                 {
 683                                         // pixbufi is useless now
 684                                         Con_Printf("LoadTGA: corrupt file\n");
 685                                         break;
 686                                 }
 687                         }
 688                 }
 689                 else
 690                 {
 691                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
 692                         {
 693                                 for (x = 0;x < image_width;)
 694                                 {
 695                                         if (fin >= enddata)
 696                                                 break; // error - truncated file
 697                                         runlen = *fin++;
 698                                         if (runlen & 0x80)
 699                                         {
 700                                                 // RLE - all pixels the same color
 701                                                 runlen += 1 - 0x80;
 702                                                 if (fin + pix_inc > enddata)
 703                                                         break; // error - truncated file
 704                                                 if (x + runlen > image_width)
 705                                                         break; // error - line exceeds width
 706                                                 bgra.b[0] = fin[0];
 707                                                 bgra.b[1] = fin[1];
 708                                                 bgra.b[2] = fin[2];
 709                                                 bgra.b[3] = 255;
 710                                                 fin += pix_inc;
 711                                                 for (;runlen--;x++)
 712                                                         *pixbufi++ = bgra.i;
 713                                         }
 714                                         else
 715                                         {
 716                                                 // uncompressed - all pixels different color
 717                                                 runlen++;
 718                                                 if (fin + pix_inc * runlen > enddata)
 719                                                         break; // error - truncated file
 720                                                 if (x + runlen > image_width)
 721                                                         break; // error - line exceeds width
 722                                                 for (;runlen--;x++)
 723                                                 {
 724                                                         bgra.b[0] = fin[0];
 725                                                         bgra.b[1] = fin[1];
 726                                                         bgra.b[2] = fin[2];
 727                                                         bgra.b[3] = 255;
 728                                                         fin += pix_inc;
 729                                                         *pixbufi++ = bgra.i;
 730                                                 }
 731                                         }
 732                                 }
 733
 734                                 if (x != image_width)
 735                                 {
 736                                         // pixbufi is useless now
 737                                         Con_Printf("LoadTGA: corrupt file\n");
 738                                         break;
 739                                 }
 740                         }
 741                 }
 742                 break;
 743         default:
 744                 // unknown image_type
 745                 break;
 746         }
 747
 748         return image_buffer;
 749 }
 750
 751 typedef struct q2wal_s
 752 {
 753         char            name[32];
 754         unsigned        width, height;
 755         unsigned        offsets[MIPLEVELS];             // four mip maps stored
 756         char            animname[32];                   // next frame in animation chain
 757         int                     flags;
 758         int                     contents;
 759         int                     value;
 760 } q2wal_t;
 761
 762 static unsigned char *LoadWAL_BGRA (const unsigned char *f, int filesize, int *miplevel)
 763 {
 764         unsigned char *image_buffer;
 765         const q2wal_t *inwal = (const q2wal_t *)f;
 766
 767         if (filesize < (int) sizeof(q2wal_t))
 768         {
 769                 Con_Print("LoadWAL: invalid WAL file\n");
 770                 return NULL;
 771         }
 772
 773         image_width = LittleLong(inwal->width);
 774         image_height = LittleLong(inwal->height);
 775         if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
 776         {
 777                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
 778                 return NULL;
 779         }
 780
 781         if (filesize < (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
 782         {
 783                 Con_Print("LoadWAL: invalid WAL file\n");
 784                 return NULL;
 785         }
 786
 787         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
 788         if (!image_buffer)
 789         {
 790                 Con_Printf("LoadWAL: not enough memory for %i by %i image\n", image_width, image_height);
 791                 return NULL;
 792         }
 793         Image_Copy8bitBGRA(f + LittleLong(inwal->offsets[0]), image_buffer, image_width * image_height, q2palette_bgra_complete);
 794         return image_buffer;
 795 }
 796
 797 qboolean LoadWAL_GetMetadata(const unsigned char *f, int filesize, int *retwidth, int *retheight, int *retflags, int *retvalue, int *retcontents, char *retanimname32c)
 798 {
 799         const q2wal_t *inwal = (const q2wal_t *)f;
 800
 801         if (filesize < (int) sizeof(q2wal_t))
 802         {
 803                 Con_Print("LoadWAL: invalid WAL file\n");
 804                 *retwidth = 16;
 805                 *retheight = 16;
 806                 *retflags = 0;
 807                 *retvalue = 0;
 808                 *retcontents = 0;
 809                 memset(retanimname32c, 0, 32);
 810                 return false;
 811         }
 812
 813         *retwidth = LittleLong(inwal->width);
 814         *retheight = LittleLong(inwal->height);
 815         *retflags = LittleLong(inwal->flags);
 816         *retvalue = LittleLong(inwal->value);
 817         *retcontents = LittleLong(inwal->contents);
 818         memcpy(retanimname32c, inwal->animname, 32);
 819         retanimname32c[31] = 0;
 820         return true;
 821 }
 822
 823
 824 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
 825 {
 826         const char *ext;
 827
 828         if (size_out == 0)
 829                 return;
 830
 831         ext = FS_FileExtension(in);
 832         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg") || !strcmp(ext, "wal")))
 833                 FS_StripExtension(in, out, size_out);
 834         else
 835                 strlcpy(out, in, size_out);
 836 }
 837
 838 static unsigned char image_linearfromsrgb[256];
 839 static unsigned char image_srgbfromlinear_lightmap[256];
 840
 841 void Image_MakeLinearColorsFromsRGB(unsigned char *pout, const unsigned char *pin, int numpixels)
 842 {
 843         int i;
 844         // this math from http://www.opengl.org/registry/specs/EXT/texture_sRGB.txt
 845         if (!image_linearfromsrgb[255])
 846                 for (i = 0;i < 256;i++)
 847                         image_linearfromsrgb[i] = (unsigned char)floor(Image_LinearFloatFromsRGB(i) * 255.0f + 0.5f);
 848         for (i = 0;i < numpixels;i++)
 849         {
 850                 pout[i*4+0] = image_linearfromsrgb[pin[i*4+0]];
 851                 pout[i*4+1] = image_linearfromsrgb[pin[i*4+1]];
 852                 pout[i*4+2] = image_linearfromsrgb[pin[i*4+2]];
 853                 pout[i*4+3] = pin[i*4+3];
 854         }
 855 }
 856
 857 void Image_MakesRGBColorsFromLinear_Lightmap(unsigned char *pout, const unsigned char *pin, int numpixels)
 858 {
 859         int i;
 860         // this math from http://www.opengl.org/registry/specs/EXT/texture_sRGB.txt
 861         if (!image_srgbfromlinear_lightmap[255])
 862                 for (i = 0;i < 256;i++)
 863                         image_srgbfromlinear_lightmap[i] = (unsigned char)floor(bound(0.0f, Image_sRGBFloatFromLinear_Lightmap(i), 1.0f) * 255.0f + 0.5f);
 864         for (i = 0;i < numpixels;i++)
 865         {
 866                 pout[i*4+0] = image_srgbfromlinear_lightmap[pin[i*4+0]];
 867                 pout[i*4+1] = image_srgbfromlinear_lightmap[pin[i*4+1]];
 868                 pout[i*4+2] = image_srgbfromlinear_lightmap[pin[i*4+2]];
 869                 pout[i*4+3] = pin[i*4+3];
 870         }
 871 }
 872
 873 typedef struct imageformat_s
 874 {
 875         const char *formatstring;
 876         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int *miplevel);
 877 }
 878 imageformat_t;
 879
 880 // GAME_TENEBRAE only
 881 imageformat_t imageformats_tenebrae[] =
 882 {
 883         {"override/%s.tga", LoadTGA_BGRA},
 884         {"override/%s.png", PNG_LoadImage_BGRA},
 885         {"override/%s.jpg", JPEG_LoadImage_BGRA},
 886         {"override/%s.pcx", LoadPCX_BGRA},
 887         {"%s.tga", LoadTGA_BGRA},
 888         {"%s.png", PNG_LoadImage_BGRA},
 889         {"%s.jpg", JPEG_LoadImage_BGRA},
 890         {"%s.pcx", LoadPCX_BGRA},
 891         {NULL, NULL}
 892 };
 893
 894 imageformat_t imageformats_nopath[] =
 895 {
 896         {"override/%s.tga", LoadTGA_BGRA},
 897         {"override/%s.png", PNG_LoadImage_BGRA},
 898         {"override/%s.jpg", JPEG_LoadImage_BGRA},
 899         {"textures/%s.tga", LoadTGA_BGRA},
 900         {"textures/%s.png", PNG_LoadImage_BGRA},
 901         {"textures/%s.jpg", JPEG_LoadImage_BGRA},
 902         {"%s.tga", LoadTGA_BGRA},
 903         {"%s.png", PNG_LoadImage_BGRA},
 904         {"%s.jpg", JPEG_LoadImage_BGRA},
 905         {"%s.pcx", LoadPCX_BGRA},
 906         {NULL, NULL}
 907 };
 908
 909 // GAME_DELUXEQUAKE only
 910 // VorteX: the point why i use such messy texture paths is
 911 // that GtkRadiant can't detect normal/gloss textures
 912 // and exclude them from texture browser
 913 // so i just use additional folder to store this textures
 914 imageformat_t imageformats_dq[] =
 915 {
 916         {"%s.tga", LoadTGA_BGRA},
 917         {"%s.jpg", JPEG_LoadImage_BGRA},
 918         {"texturemaps/%s.tga", LoadTGA_BGRA},
 919         {"texturemaps/%s.jpg", JPEG_LoadImage_BGRA},
 920         {NULL, NULL}
 921 };
 922
 923 imageformat_t imageformats_textures[] =
 924 {
 925         {"%s.tga", LoadTGA_BGRA},
 926         {"%s.png", PNG_LoadImage_BGRA},
 927         {"%s.jpg", JPEG_LoadImage_BGRA},
 928         {"%s.pcx", LoadPCX_BGRA},
 929         {"%s.wal", LoadWAL_BGRA},
 930         {NULL, NULL}
 931 };
 932
 933 imageformat_t imageformats_gfx[] =
 934 {
 935         {"%s.tga", LoadTGA_BGRA},
 936         {"%s.png", PNG_LoadImage_BGRA},
 937         {"%s.jpg", JPEG_LoadImage_BGRA},
 938         {"%s.pcx", LoadPCX_BGRA},
 939         {NULL, NULL}
 940 };
 941
 942 imageformat_t imageformats_other[] =
 943 {
 944         {"%s.tga", LoadTGA_BGRA},
 945         {"%s.png", PNG_LoadImage_BGRA},
 946         {"%s.jpg", JPEG_LoadImage_BGRA},
 947         {"%s.pcx", LoadPCX_BGRA},
 948         {NULL, NULL}
 949 };
 950
 951 int fixtransparentpixels(unsigned char *data, int w, int h);
 952 unsigned char *loadimagepixelsbgra (const char *filename, qboolean complain, qboolean allowFixtrans, qboolean convertsRGB, int *miplevel)
 953 {
 954         fs_offset_t filesize;
 955         imageformat_t *firstformat, *format;
 956         unsigned char *f, *data = NULL, *data2 = NULL;
 957         char basename[MAX_QPATH], name[MAX_QPATH], name2[MAX_QPATH], *c;
 958         char vabuf[1024];
 959         //if (developer_memorydebug.integer)
 960         //      Mem_CheckSentinelsGlobal();
 961         if (developer_texturelogging.integer)
 962                 Log_Printf("textures.log", "%s\n", filename);
 963         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
 964         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
 965         for (c = basename;*c;c++)
 966                 if (*c == '*')
 967                         *c = '#';
 968         name[0] = 0;
 969         if (strchr(basename, '/'))
 970         {
 971                 int i;
 972                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
 973                         name[i] = basename[i];
 974                 name[i] = 0;
 975         }
 976         if (gamemode == GAME_TENEBRAE)
 977                 firstformat = imageformats_tenebrae;
 978         else if (gamemode == GAME_DELUXEQUAKE)
 979                 firstformat = imageformats_dq;
 980         else if (!strcasecmp(name, "textures"))
 981                 firstformat = imageformats_textures;
 982         else if (!strcasecmp(name, "gfx"))
 983                 firstformat = imageformats_gfx;
 984         else if (!strchr(basename, '/'))
 985                 firstformat = imageformats_nopath;
 986         else
 987                 firstformat = imageformats_other;
 988         // now try all the formats in the selected list
 989         for (format = firstformat;format->formatstring;format++)
 990         {
 991                 dpsnprintf (name, sizeof(name), format->formatstring, basename);
 992                 f = FS_LoadFile(name, tempmempool, true, &filesize);
 993                 if (f)
 994                 {
 995                         int mymiplevel = miplevel ? *miplevel : 0;
 996                         image_width = 0;
 997                         image_height = 0;
 998                         data = format->loadfunc(f, (int)filesize, &mymiplevel);
 999                         Mem_Free(f);
1000                         if (data)
1001                         {
1002                                 if(format->loadfunc == JPEG_LoadImage_BGRA) // jpeg can't do alpha, so let's simulate it by loading another jpeg
1003                                 {
1004                                         dpsnprintf (name2, sizeof(name2), format->formatstring, va(vabuf, sizeof(vabuf), "%s_alpha", basename));
1005                                         f = FS_LoadFile(name2, tempmempool, true, &filesize);
1006                                         if(f)
1007                                         {
1008                                                 int mymiplevel2 = miplevel ? *miplevel : 0;
1009                                                 int image_width_save = image_width;
1010                                                 int image_height_save = image_height;
1011                                                 data2 = format->loadfunc(f, (int)filesize, &mymiplevel2);
1012                                                 if(data2 && mymiplevel == mymiplevel2 && image_width == image_width_save && image_height == image_height_save)
1013                                                         Image_CopyAlphaFromBlueBGRA(data, data2, image_width, image_height);
1014                                                 else
1015                                                         Con_Printf("loadimagepixelsrgba: corrupt or invalid alpha image %s_alpha\n", basename);
1016                                                 image_width = image_width_save;
1017                                                 image_height = image_height_save;
1018                                                 if(data2)
1019                                                         Mem_Free(data2);
1020                                                 Mem_Free(f);
1021                                         }
1022                                 }
1023                                 if (developer_loading.integer)
1024                                         Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
1025                                 if(miplevel)
1026                                         *miplevel = mymiplevel;
1027                                 //if (developer_memorydebug.integer)
1028                                 //      Mem_CheckSentinelsGlobal();
1029                                 if(allowFixtrans && r_fixtrans_auto.integer)
1030                                 {
1031                                         int n = fixtransparentpixels(data, image_width, image_height);
1032                                         if(n)
1033                                         {
1034                                                 Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
1035                                                 if(r_fixtrans_auto.integer >= 2)
1036                                                 {
1037                                                         char outfilename[MAX_QPATH], buf[MAX_QPATH];
1038                                                         Image_StripImageExtension(name, buf, sizeof(buf));
1039                                                         dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1040                                                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1041                                                         Con_Printf("- %s written.\n", outfilename);
1042                                                 }
1043                                         }
1044                                 }
1045                                 if (convertsRGB)
1046                                         Image_MakeLinearColorsFromsRGB(data, data, image_width * image_height);
1047                                 return data;
1048                         }
1049                         else
1050                                 Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
1051                 }
1052         }
1053         if (complain)
1054         {
1055                 Con_Printf("Couldn't load %s using ", filename);
1056                 for (format = firstformat;format->formatstring;format++)
1057                 {
1058                         dpsnprintf (name, sizeof(name), format->formatstring, basename);
1059                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
1060                 }
1061         }
1062
1063         // texture loading can take a while, so make sure we're sending keepalives
1064         CL_KeepaliveMessage(false);
1065
1066         //if (developer_memorydebug.integer)
1067         //      Mem_CheckSentinelsGlobal();
1068         return NULL;
1069 }
1070
1071 extern cvar_t gl_picmip;
1072 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans, qboolean sRGB)
1073 {
1074         unsigned char *data;
1075         rtexture_t *rt;
1076         int miplevel = R_PicmipForFlags(flags);
1077         if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans, false, &miplevel)))
1078                 return 0;
1079         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, sRGB ? TEXTYPE_SRGB_BGRA : TEXTYPE_BGRA, flags, miplevel, NULL);
1080         Mem_Free(data);
1081         return rt;
1082 }
1083
1084 int fixtransparentpixels(unsigned char *data, int w, int h)
1085 {
1086         int const FIXTRANS_NEEDED = 1;
1087         int const FIXTRANS_HAS_L = 2;
1088         int const FIXTRANS_HAS_R = 4;
1089         int const FIXTRANS_HAS_U = 8;
1090         int const FIXTRANS_HAS_D = 16;
1091         int const FIXTRANS_FIXED = 32;
1092         unsigned char *fixMask = (unsigned char *) Mem_Alloc(tempmempool, w * h);
1093         int fixPixels = 0;
1094         int changedPixels = 0;
1095         int x, y;
1096
1097 #define FIXTRANS_PIXEL (y*w+x)
1098 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
1099 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
1100 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
1101 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
1102
1103         memset(fixMask, 0, w * h);
1104         for(y = 0; y < h; ++y)
1105                 for(x = 0; x < w; ++x)
1106                 {
1107                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
1108                         {
1109                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
1110                                 ++fixPixels;
1111                         }
1112                         else
1113                         {
1114                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1115                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1116                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1117                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1118                         }
1119                 }
1120         if(fixPixels == w * h)
1121                 return 0; // sorry, can't do anything about this
1122         while(fixPixels)
1123         {
1124                 for(y = 0; y < h; ++y)
1125                         for(x = 0; x < w; ++x)
1126                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
1127                                 {
1128                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
1129                                         unsigned char r, g, b, a, r0, g0, b0;
1130                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
1131                                         {
1132                                                 r = data[FIXTRANS_PIXEL_U * 4 + 2];
1133                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
1134                                                 b = data[FIXTRANS_PIXEL_U * 4 + 0];
1135                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
1136                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1137                                         }
1138                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
1139                                         {
1140                                                 r = data[FIXTRANS_PIXEL_D * 4 + 2];
1141                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
1142                                                 b = data[FIXTRANS_PIXEL_D * 4 + 0];
1143                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
1144                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1145                                         }
1146                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
1147                                         {
1148                                                 r = data[FIXTRANS_PIXEL_L * 4 + 2];
1149                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
1150                                                 b = data[FIXTRANS_PIXEL_L * 4 + 0];
1151                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
1152                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1153                                         }
1154                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
1155                                         {
1156                                                 r = data[FIXTRANS_PIXEL_R * 4 + 2];
1157                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
1158                                                 b = data[FIXTRANS_PIXEL_R * 4 + 0];
1159                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
1160                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1161                                         }
1162                                         if(!cnt)
1163                                                 continue;
1164                                         r0 = data[FIXTRANS_PIXEL * 4 + 2];
1165                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
1166                                         b0 = data[FIXTRANS_PIXEL * 4 + 0];
1167                                         if(sumA)
1168                                         {
1169                                                 // there is a surrounding non-alpha pixel
1170                                                 r = (sumRA + sumA / 2) / sumA;
1171                                                 g = (sumGA + sumA / 2) / sumA;
1172                                                 b = (sumBA + sumA / 2) / sumA;
1173                                         }
1174                                         else
1175                                         {
1176                                                 // need to use a "regular" average
1177                                                 r = (sumR + cnt / 2) / cnt;
1178                                                 g = (sumG + cnt / 2) / cnt;
1179                                                 b = (sumB + cnt / 2) / cnt;
1180                                         }
1181                                         if(r != r0 || g != g0 || b != b0)
1182                                                 ++changedPixels;
1183                                         data[FIXTRANS_PIXEL * 4 + 2] = r;
1184                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
1185                                         data[FIXTRANS_PIXEL * 4 + 0] = b;
1186                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
1187                                 }
1188                 for(y = 0; y < h; ++y)
1189                         for(x = 0; x < w; ++x)
1190                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
1191                                 {
1192                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
1193                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1194                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1195                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1196                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1197                                         --fixPixels;
1198                                 }
1199         }
1200         return changedPixels;
1201 }
1202
1203 void Image_FixTransparentPixels_f(void)
1204 {
1205         const char *filename, *filename_pattern;
1206         fssearch_t *search;
1207         int i, n;
1208         char outfilename[MAX_QPATH], buf[MAX_QPATH];
1209         unsigned char *data;
1210         if(Cmd_Argc() != 2)
1211         {
1212                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
1213                 return;
1214         }
1215         filename_pattern = Cmd_Argv(1);
1216         search = FS_Search(filename_pattern, true, true);
1217         if(!search)
1218                 return;
1219         for(i = 0; i < search->numfilenames; ++i)
1220         {
1221                 filename = search->filenames[i];
1222                 Con_Printf("Processing %s... ", filename);
1223                 Image_StripImageExtension(filename, buf, sizeof(buf));
1224                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1225                 if(!(data = loadimagepixelsbgra(filename, true, false, false, NULL)))
1226                         return;
1227                 if((n = fixtransparentpixels(data, image_width, image_height)))
1228                 {
1229                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1230                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1231                 }
1232                 else
1233                         Con_Printf("unchanged.\n");
1234                 Mem_Free(data);
1235         }
1236         FS_FreeSearch(search);
1237 }
1238
1239 qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data)
1240 {
1241         qboolean ret;
1242         unsigned char buffer[18];
1243         const void *buffers[2];
1244         fs_offset_t sizes[2];
1245
1246         memset (buffer, 0, 18);
1247         buffer[2] = 2;          // uncompressed type
1248         buffer[12] = (width >> 0) & 0xFF;
1249         buffer[13] = (width >> 8) & 0xFF;
1250         buffer[14] = (height >> 0) & 0xFF;
1251         buffer[15] = (height >> 8) & 0xFF;
1252         buffer[16] = 24;        // pixel size
1253
1254         buffers[0] = buffer;
1255         sizes[0] = 18;
1256         buffers[1] = data;
1257         sizes[1] = width*height*3;
1258         ret = FS_WriteFileInBlocks(filename, buffers, sizes, 2);
1259
1260         return ret;
1261 }
1262
1263 qboolean Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
1264 {
1265         int y;
1266         unsigned char *buffer, *out;
1267         const unsigned char *in, *end;
1268         qboolean ret;
1269
1270         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1271
1272         memset (buffer, 0, 18);
1273         buffer[2] = 2;          // uncompressed type
1274         buffer[12] = (width >> 0) & 0xFF;
1275         buffer[13] = (width >> 8) & 0xFF;
1276         buffer[14] = (height >> 0) & 0xFF;
1277         buffer[15] = (height >> 8) & 0xFF;
1278
1279         for (y = 3;y < width*height*4;y += 4)
1280                 if (data[y] < 255)
1281                         break;
1282
1283         if (y < width*height*4)
1284         {
1285                 // save the alpha channel
1286                 buffer[16] = 32;        // pixel size
1287                 buffer[17] = 8; // 8 bits of alpha
1288
1289                 // flip upside down
1290                 out = buffer + 18;
1291                 for (y = height - 1;y >= 0;y--)
1292                 {
1293                         memcpy(out, data + y * width * 4, width * 4);
1294                         out += width*4;
1295                 }
1296         }
1297         else
1298         {
1299                 // save only the color channels
1300                 buffer[16] = 24;        // pixel size
1301                 buffer[17] = 0; // 8 bits of alpha
1302
1303                 // truncate bgra to bgr and flip upside down
1304                 out = buffer + 18;
1305                 for (y = height - 1;y >= 0;y--)
1306                 {
1307                         in = data + y * width * 4;
1308                         end = in + width * 4;
1309                         for (;in < end;in += 4)
1310                         {
1311                                 *out++ = in[0];
1312                                 *out++ = in[1];
1313                                 *out++ = in[2];
1314                         }
1315                 }
1316         }
1317         ret = FS_WriteFile (filename, buffer, out - buffer);
1318
1319         Mem_Free(buffer);
1320
1321         return ret;
1322 }
1323
1324 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1325 {
1326         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1327         fstep = (int) (inwidth*65536.0f/outwidth);
1328         endx = (inwidth-1);
1329         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1330         {
1331                 xi = f >> 16;
1332                 if (xi != oldx)
1333                 {
1334                         in += (xi - oldx) * 4;
1335                         oldx = xi;
1336                 }
1337                 if (xi < endx)
1338                 {
1339                         lerp = f & 0xFFFF;
1340                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1341                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1342                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1343                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1344                 }
1345                 else // last pixel of the line has no pixel to lerp to
1346                 {
1347                         *out++ = in[0];
1348                         *out++ = in[1];
1349                         *out++ = in[2];
1350                         *out++ = in[3];
1351                 }
1352         }
1353 }
1354
1355 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1356 static void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1357 {
1358         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1359         unsigned char *out;
1360         const unsigned char *inrow;
1361         unsigned char *resamplerow1;
1362         unsigned char *resamplerow2;
1363         out = (unsigned char *)outdata;
1364         fstep = (int) (inheight*65536.0f/outheight);
1365
1366         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1367         resamplerow2 = resamplerow1 + outwidth*4;
1368
1369         inrow = (const unsigned char *)indata;
1370         oldy = 0;
1371         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1372         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1373         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1374         {
1375                 yi = f >> 16;
1376                 if (yi < endy)
1377                 {
1378                         lerp = f & 0xFFFF;
1379                         if (yi != oldy)
1380                         {
1381                                 inrow = (unsigned char *)indata + inwidth4*yi;
1382                                 if (yi == oldy+1)
1383                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1384                                 else
1385                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1386                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1387                                 oldy = yi;
1388                         }
1389                         j = outwidth - 4;
1390                         while(j >= 0)
1391                         {
1392                                 LERPBYTE( 0);
1393                                 LERPBYTE( 1);
1394                                 LERPBYTE( 2);
1395                                 LERPBYTE( 3);
1396                                 LERPBYTE( 4);
1397                                 LERPBYTE( 5);
1398                                 LERPBYTE( 6);
1399                                 LERPBYTE( 7);
1400                                 LERPBYTE( 8);
1401                                 LERPBYTE( 9);
1402                                 LERPBYTE(10);
1403                                 LERPBYTE(11);
1404                                 LERPBYTE(12);
1405                                 LERPBYTE(13);
1406                                 LERPBYTE(14);
1407                                 LERPBYTE(15);
1408                                 out += 16;
1409                                 resamplerow1 += 16;
1410                                 resamplerow2 += 16;
1411                                 j -= 4;
1412                         }
1413                         if (j & 2)
1414                         {
1415                                 LERPBYTE( 0);
1416                                 LERPBYTE( 1);
1417                                 LERPBYTE( 2);
1418                                 LERPBYTE( 3);
1419                                 LERPBYTE( 4);
1420                                 LERPBYTE( 5);
1421                                 LERPBYTE( 6);
1422                                 LERPBYTE( 7);
1423                                 out += 8;
1424                                 resamplerow1 += 8;
1425                                 resamplerow2 += 8;
1426                         }
1427                         if (j & 1)
1428                         {
1429                                 LERPBYTE( 0);
1430                                 LERPBYTE( 1);
1431                                 LERPBYTE( 2);
1432                                 LERPBYTE( 3);
1433                                 out += 4;
1434                                 resamplerow1 += 4;
1435                                 resamplerow2 += 4;
1436                         }
1437                         resamplerow1 -= outwidth4;
1438                         resamplerow2 -= outwidth4;
1439                 }
1440                 else
1441                 {
1442                         if (yi != oldy)
1443                         {
1444                                 inrow = (unsigned char *)indata + inwidth4*yi;
1445                                 if (yi == oldy+1)
1446                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1447                                 else
1448                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1449                                 oldy = yi;
1450                         }
1451                         memcpy(out, resamplerow1, outwidth4);
1452                 }
1453         }
1454
1455         Mem_Free(resamplerow1);
1456         resamplerow1 = NULL;
1457         resamplerow2 = NULL;
1458 }
1459
1460 static void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1461 {
1462         int i, j;
1463         unsigned frac, fracstep;
1464         // relies on int being 4 bytes
1465         int *inrow, *out;
1466         out = (int *)outdata;
1467
1468         fracstep = inwidth*0x10000/outwidth;
1469         for (i = 0;i < outheight;i++)
1470         {
1471                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1472                 frac = fracstep >> 1;
1473                 j = outwidth - 4;
1474                 while (j >= 0)
1475                 {
1476                         out[0] = inrow[frac >> 16];frac += fracstep;
1477                         out[1] = inrow[frac >> 16];frac += fracstep;
1478                         out[2] = inrow[frac >> 16];frac += fracstep;
1479                         out[3] = inrow[frac >> 16];frac += fracstep;
1480                         out += 4;
1481                         j -= 4;
1482                 }
1483                 if (j & 2)
1484                 {
1485                         out[0] = inrow[frac >> 16];frac += fracstep;
1486                         out[1] = inrow[frac >> 16];frac += fracstep;
1487                         out += 2;
1488                 }
1489                 if (j & 1)
1490                 {
1491                         out[0] = inrow[frac >> 16];frac += fracstep;
1492                         out += 1;
1493                 }
1494         }
1495 }
1496
1497 /*
1498 ================
1499 Image_Resample
1500 ================
1501 */
1502 void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
1503 {
1504         if (indepth != 1 || outdepth != 1)
1505         {
1506                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1507                 return;
1508         }
1509         if (quality)
1510                 Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1511         else
1512                 Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1513 }
1514
1515 // in can be the same as out
1516 void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
1517 {
1518         const unsigned char *inrow;
1519         int x, y, nextrow;
1520         if (*depth != 1 || destdepth != 1)
1521         {
1522                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1523                 if (*width > destwidth)
1524                         *width >>= 1;
1525                 if (*height > destheight)
1526                         *height >>= 1;
1527                 if (*depth > destdepth)
1528                         *depth >>= 1;
1529                 return;
1530         }
1531         // note: if given odd width/height this discards the last row/column of
1532         // pixels, rather than doing a proper box-filter scale down
1533         inrow = in;
1534         nextrow = *width * 4;
1535         if (*width > destwidth)
1536         {
1537                 *width >>= 1;
1538                 if (*height > destheight)
1539                 {
1540                         // reduce both
1541                         *height >>= 1;
1542                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1543                         {
1544                                 for (in = inrow, x = 0;x < *width;x++)
1545                                 {
1546                                         out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1547                                         out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1548                                         out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1549                                         out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1550                                         out += 4;
1551                                         in += 8;
1552                                 }
1553                         }
1554                 }
1555                 else
1556                 {
1557                         // reduce width
1558                         for (y = 0;y < *height;y++, inrow += nextrow)
1559                         {
1560                                 for (in = inrow, x = 0;x < *width;x++)
1561                                 {
1562                                         out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1563                                         out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1564                                         out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1565                                         out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1566                                         out += 4;
1567                                         in += 8;
1568                                 }
1569                         }
1570                 }
1571         }
1572         else
1573         {
1574                 if (*height > destheight)
1575                 {
1576                         // reduce height
1577                         *height >>= 1;
1578                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1579                         {
1580                                 for (in = inrow, x = 0;x < *width;x++)
1581                                 {
1582                                         out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1583                                         out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1584                                         out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1585                                         out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1586                                         out += 4;
1587                                         in += 4;
1588                                 }
1589                         }
1590                 }
1591                 else
1592                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1593         }
1594 }
1595
1596 void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1597 {
1598         int x, y, x1, x2, y1, y2;
1599         const unsigned char *b, *row[3];
1600         int p[5];
1601         unsigned char *out;
1602         float ibumpscale, n[3];
1603         ibumpscale = (255.0f * 6.0f) / bumpscale;
1604         out = outpixels;
1605         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1606         {
1607                 y2 = y + 1;if (y2 >= height) y2 = 0;
1608                 row[0] = inpixels + (y1 * width) * 4;
1609                 row[1] = inpixels + (y  * width) * 4;
1610                 row[2] = inpixels + (y2 * width) * 4;
1611                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1612                 {
1613                         x2 = x + 1;if (x2 >= width) x2 = 0;
1614                         // left, right
1615                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1616                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1617                         // above, below
1618                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1619                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1620                         // center
1621                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1622                         // calculate a normal from the slopes
1623                         n[0] = p[0] - p[1];
1624                         n[1] = p[3] - p[2];
1625                         n[2] = ibumpscale;
1626                         VectorNormalize(n);
1627                         // turn it into a dot3 rgb vector texture
1628                         out[2] = (int)(128.0f + n[0] * 127.0f);
1629                         out[1] = (int)(128.0f + n[1] * 127.0f);
1630                         out[0] = (int)(128.0f + n[2] * 127.0f);
1631                         out[3] = (p[4]) / 3;
1632                         out += 4;
1633                 }
1634         }
1635 }