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[xonotic/darkplaces.git] / 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 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 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
360 TARGA LOADING
361
362 =========================================================
363 */
364
365 typedef struct _TargaHeader
366 {
367         unsigned char   id_length, colormap_type, image_type;
368         unsigned short  colormap_index, colormap_length;
369         unsigned char   colormap_size;
370         unsigned short  x_origin, y_origin, width, height;
371         unsigned char   pixel_size, attributes;
372 }
373 TargaHeader;
374
375 void PrintTargaHeader(TargaHeader *t)
376 {
377         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);
378 }
379
380 /*
381 =============
382 LoadTGA
383 =============
384 */
385 unsigned char *LoadTGA_BGRA (const unsigned char *f, int filesize, int *miplevel)
386 {
387         int x, y, pix_inc, row_inci, runlen, alphabits;
388         unsigned char *image_buffer;
389         unsigned int *pixbufi;
390         const unsigned char *fin, *enddata;
391         TargaHeader targa_header;
392         unsigned int palettei[256];
393         union
394         {
395                 unsigned int i;
396                 unsigned char b[4];
397         }
398         bgra;
399
400         if (filesize < 19)
401                 return NULL;
402
403         enddata = f + filesize;
404
405         targa_header.id_length = f[0];
406         targa_header.colormap_type = f[1];
407         targa_header.image_type = f[2];
408
409         targa_header.colormap_index = f[3] + f[4] * 256;
410         targa_header.colormap_length = f[5] + f[6] * 256;
411         targa_header.colormap_size = f[7];
412         targa_header.x_origin = f[8] + f[9] * 256;
413         targa_header.y_origin = f[10] + f[11] * 256;
414         targa_header.width = image_width = f[12] + f[13] * 256;
415         targa_header.height = image_height = f[14] + f[15] * 256;
416         targa_header.pixel_size = f[16];
417         targa_header.attributes = f[17];
418
419         if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
420         {
421                 Con_Print("LoadTGA: invalid size\n");
422                 PrintTargaHeader(&targa_header);
423                 return NULL;
424         }
425
426         // advance to end of header
427         fin = f + 18;
428
429         // skip TARGA image comment (usually 0 bytes)
430         fin += targa_header.id_length;
431
432         // read/skip the colormap if present (note: according to the TARGA spec it
433         // can be present even on truecolor or greyscale images, just not used by
434         // the image data)
435         if (targa_header.colormap_type)
436         {
437                 if (targa_header.colormap_length > 256)
438                 {
439                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
440                         PrintTargaHeader(&targa_header);
441                         return NULL;
442                 }
443                 if (targa_header.colormap_index)
444                 {
445                         Con_Print("LoadTGA: colormap_index not supported\n");
446                         PrintTargaHeader(&targa_header);
447                         return NULL;
448                 }
449                 if (targa_header.colormap_size == 24)
450                 {
451                         for (x = 0;x < targa_header.colormap_length;x++)
452                         {
453                                 bgra.b[0] = *fin++;
454                                 bgra.b[1] = *fin++;
455                                 bgra.b[2] = *fin++;
456                                 bgra.b[3] = 255;
457                                 palettei[x] = bgra.i;
458                         }
459                 }
460                 else if (targa_header.colormap_size == 32)
461                 {
462                         memcpy(palettei, fin, targa_header.colormap_length*4);
463                         fin += targa_header.colormap_length * 4;
464                 }
465                 else
466                 {
467                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
468                         PrintTargaHeader(&targa_header);
469                         return NULL;
470                 }
471         }
472
473         // check our pixel_size restrictions according to image_type
474         switch (targa_header.image_type & ~8)
475         {
476         case 2:
477                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
478                 {
479                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
480                         PrintTargaHeader(&targa_header);
481                         return NULL;
482                 }
483                 break;
484         case 3:
485                 // set up a palette to make the loader easier
486                 for (x = 0;x < 256;x++)
487                 {
488                         bgra.b[0] = bgra.b[1] = bgra.b[2] = x;
489                         bgra.b[3] = 255;
490                         palettei[x] = bgra.i;
491                 }
492                 // fall through to colormap case
493         case 1:
494                 if (targa_header.pixel_size != 8)
495                 {
496                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
497                         PrintTargaHeader(&targa_header);
498                         return NULL;
499                 }
500                 break;
501         default:
502                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
503                 PrintTargaHeader(&targa_header);
504                 return NULL;
505         }
506
507         if (targa_header.attributes & 0x10)
508         {
509                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
510                 return NULL;
511         }
512
513         // number of attribute bits per pixel, we only support 0 or 8
514         alphabits = targa_header.attributes & 0x0F;
515         if (alphabits != 8 && alphabits != 0)
516         {
517                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
518                 return NULL;
519         }
520
521         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
522         if (!image_buffer)
523         {
524                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
525                 return NULL;
526         }
527
528         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
529         if ((targa_header.attributes & 0x20) == 0)
530         {
531                 pixbufi = (unsigned int*)image_buffer + (image_height - 1)*image_width;
532                 row_inci = -image_width*2;
533         }
534         else
535         {
536                 pixbufi = (unsigned int*)image_buffer;
537                 row_inci = 0;
538         }
539
540         x = 0;
541         y = 0;
542         pix_inc = 1;
543         if ((targa_header.image_type & ~8) == 2)
544                 pix_inc = (targa_header.pixel_size + 7) / 8;
545         switch (targa_header.image_type)
546         {
547         case 1: // colormapped, uncompressed
548         case 3: // greyscale, uncompressed
549                 if (fin + image_width * image_height * pix_inc > enddata)
550                         break;
551                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
552                         for (x = 0;x < image_width;x++)
553                                 *pixbufi++ = palettei[*fin++];
554                 break;
555         case 2:
556                 // BGR or BGRA, uncompressed
557                 if (fin + image_width * image_height * pix_inc > enddata)
558                         break;
559                 if (targa_header.pixel_size == 32 && alphabits)
560                 {
561                         for (y = 0;y < image_height;y++)
562                                 memcpy(pixbufi + y * (image_width + row_inci), fin + y * image_width * pix_inc, image_width*4);
563                 }
564                 else
565                 {
566                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
567                         {
568                                 for (x = 0;x < image_width;x++, fin += pix_inc)
569                                 {
570                                         bgra.b[0] = fin[0];
571                                         bgra.b[1] = fin[1];
572                                         bgra.b[2] = fin[2];
573                                         bgra.b[3] = 255;
574                                         *pixbufi++ = bgra.i;
575                                 }
576                         }
577                 }
578                 break;
579         case 9: // colormapped, RLE
580         case 11: // greyscale, RLE
581                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
582                 {
583                         for (x = 0;x < image_width;)
584                         {
585                                 if (fin >= enddata)
586                                         break; // error - truncated file
587                                 runlen = *fin++;
588                                 if (runlen & 0x80)
589                                 {
590                                         // RLE - all pixels the same color
591                                         runlen += 1 - 0x80;
592                                         if (fin + pix_inc > enddata)
593                                                 break; // error - truncated file
594                                         if (x + runlen > image_width)
595                                                 break; // error - line exceeds width
596                                         bgra.i = palettei[*fin++];
597                                         for (;runlen--;x++)
598                                                 *pixbufi++ = bgra.i;
599                                 }
600                                 else
601                                 {
602                                         // uncompressed - all pixels different color
603                                         runlen++;
604                                         if (fin + pix_inc * runlen > enddata)
605                                                 break; // error - truncated file
606                                         if (x + runlen > image_width)
607                                                 break; // error - line exceeds width
608                                         for (;runlen--;x++)
609                                                 *pixbufi++ = palettei[*fin++];
610                                 }
611                         }
612
613                         if (x != image_width)
614                         {
615                                 // pixbufi is useless now
616                                 Con_Printf("LoadTGA: corrupt file\n");
617                                 break;
618                         }
619                 }
620                 break;
621         case 10:
622                 // BGR or BGRA, RLE
623                 if (targa_header.pixel_size == 32 && alphabits)
624                 {
625                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
626                         {
627                                 for (x = 0;x < image_width;)
628                                 {
629                                         if (fin >= enddata)
630                                                 break; // error - truncated file
631                                         runlen = *fin++;
632                                         if (runlen & 0x80)
633                                         {
634                                                 // RLE - all pixels the same color
635                                                 runlen += 1 - 0x80;
636                                                 if (fin + pix_inc > enddata)
637                                                         break; // error - truncated file
638                                                 if (x + runlen > image_width)
639                                                         break; // error - line exceeds width
640                                                 bgra.b[0] = fin[0];
641                                                 bgra.b[1] = fin[1];
642                                                 bgra.b[2] = fin[2];
643                                                 bgra.b[3] = fin[3];
644                                                 fin += pix_inc;
645                                                 for (;runlen--;x++)
646                                                         *pixbufi++ = bgra.i;
647                                         }
648                                         else
649                                         {
650                                                 // uncompressed - all pixels different color
651                                                 runlen++;
652                                                 if (fin + pix_inc * runlen > enddata)
653                                                         break; // error - truncated file
654                                                 if (x + runlen > image_width)
655                                                         break; // error - line exceeds width
656                                                 for (;runlen--;x++)
657                                                 {
658                                                         bgra.b[0] = fin[0];
659                                                         bgra.b[1] = fin[1];
660                                                         bgra.b[2] = fin[2];
661                                                         bgra.b[3] = fin[3];
662                                                         fin += pix_inc;
663                                                         *pixbufi++ = bgra.i;
664                                                 }
665                                         }
666                                 }
667
668                                 if (x != image_width)
669                                 {
670                                         // pixbufi is useless now
671                                         Con_Printf("LoadTGA: corrupt file\n");
672                                         break;
673                                 }
674                         }
675                 }
676                 else
677                 {
678                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
679                         {
680                                 for (x = 0;x < image_width;)
681                                 {
682                                         if (fin >= enddata)
683                                                 break; // error - truncated file
684                                         runlen = *fin++;
685                                         if (runlen & 0x80)
686                                         {
687                                                 // RLE - all pixels the same color
688                                                 runlen += 1 - 0x80;
689                                                 if (fin + pix_inc > enddata)
690                                                         break; // error - truncated file
691                                                 if (x + runlen > image_width)
692                                                         break; // error - line exceeds width
693                                                 bgra.b[0] = fin[0];
694                                                 bgra.b[1] = fin[1];
695                                                 bgra.b[2] = fin[2];
696                                                 bgra.b[3] = 255;
697                                                 fin += pix_inc;
698                                                 for (;runlen--;x++)
699                                                         *pixbufi++ = bgra.i;
700                                         }
701                                         else
702                                         {
703                                                 // uncompressed - all pixels different color
704                                                 runlen++;
705                                                 if (fin + pix_inc * runlen > enddata)
706                                                         break; // error - truncated file
707                                                 if (x + runlen > image_width)
708                                                         break; // error - line exceeds width
709                                                 for (;runlen--;x++)
710                                                 {
711                                                         bgra.b[0] = fin[0];
712                                                         bgra.b[1] = fin[1];
713                                                         bgra.b[2] = fin[2];
714                                                         bgra.b[3] = 255;
715                                                         fin += pix_inc;
716                                                         *pixbufi++ = bgra.i;
717                                                 }
718                                         }
719                                 }
720
721                                 if (x != image_width)
722                                 {
723                                         // pixbufi is useless now
724                                         Con_Printf("LoadTGA: corrupt file\n");
725                                         break;
726                                 }
727                         }
728                 }
729                 break;
730         default:
731                 // unknown image_type
732                 break;
733         }
734
735         return image_buffer;
736 }
737
738 typedef struct q2wal_s
739 {
740         char            name[32];
741         unsigned        width, height;
742         unsigned        offsets[MIPLEVELS];             // four mip maps stored
743         char            animname[32];                   // next frame in animation chain
744         int                     flags;
745         int                     contents;
746         int                     value;
747 } q2wal_t;
748
749 unsigned char *LoadWAL_BGRA (const unsigned char *f, int filesize, int *miplevel)
750 {
751         unsigned char *image_buffer;
752         const q2wal_t *inwal = (const q2wal_t *)f;
753
754         if (filesize < (int) sizeof(q2wal_t))
755         {
756                 Con_Print("LoadWAL: invalid WAL file\n");
757                 return NULL;
758         }
759
760         image_width = LittleLong(inwal->width);
761         image_height = LittleLong(inwal->height);
762         if (image_width > 32768 || image_height > 32768 || image_width <= 0 || image_height <= 0)
763         {
764                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
765                 return NULL;
766         }
767
768         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
769         {
770                 Con_Print("LoadWAL: invalid WAL file\n");
771                 return NULL;
772         }
773
774         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
775         if (!image_buffer)
776         {
777                 Con_Printf("LoadWAL: not enough memory for %i by %i image\n", image_width, image_height);
778                 return NULL;
779         }
780         Image_Copy8bitBGRA(f + LittleLong(inwal->offsets[0]), image_buffer, image_width * image_height, palette_bgra_complete);
781         return image_buffer;
782 }
783
784
785 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
786 {
787         const char *ext;
788
789         if (size_out == 0)
790                 return;
791
792         ext = FS_FileExtension(in);
793         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
794                 FS_StripExtension(in, out, size_out);
795         else
796                 strlcpy(out, in, size_out);
797 }
798
799 static unsigned char image_linearfromsrgb[256];
800 static unsigned char image_srgbfromlinear_lightmap[256];
801
802 void Image_MakeLinearColorsFromsRGB(unsigned char *pout, const unsigned char *pin, int numpixels)
803 {
804         int i;
805         // this math from http://www.opengl.org/registry/specs/EXT/texture_sRGB.txt
806         if (!image_linearfromsrgb[255])
807                 for (i = 0;i < 256;i++)
808                         image_linearfromsrgb[i] = (unsigned char)(Image_LinearFloatFromsRGB(i) * 256.0f);
809         for (i = 0;i < numpixels;i++)
810         {
811                 pout[i*4+0] = image_linearfromsrgb[pin[i*4+0]];
812                 pout[i*4+1] = image_linearfromsrgb[pin[i*4+1]];
813                 pout[i*4+2] = image_linearfromsrgb[pin[i*4+2]];
814                 pout[i*4+3] = pin[i*4+3];
815         }
816 }
817
818 void Image_MakesRGBColorsFromLinear_Lightmap(unsigned char *pout, const unsigned char *pin, int numpixels)
819 {
820         int i;
821         // this math from http://www.opengl.org/registry/specs/EXT/texture_sRGB.txt
822         if (!image_srgbfromlinear_lightmap[255])
823                 for (i = 0;i < 256;i++)
824                         image_srgbfromlinear_lightmap[i] = (unsigned char)bound(0, Image_sRGBFloatFromLinear(i*2) * 128.0f, 255);
825         for (i = 0;i < numpixels;i++)
826         {
827                 pout[i*4+0] = image_srgbfromlinear_lightmap[pin[i*4+0]];
828                 pout[i*4+1] = image_srgbfromlinear_lightmap[pin[i*4+1]];
829                 pout[i*4+2] = image_srgbfromlinear_lightmap[pin[i*4+2]];
830                 pout[i*4+3] = pin[i*4+3];
831         }
832 }
833
834 typedef struct imageformat_s
835 {
836         const char *formatstring;
837         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int *miplevel);
838 }
839 imageformat_t;
840
841 // GAME_TENEBRAE only
842 imageformat_t imageformats_tenebrae[] =
843 {
844         {"override/%s.tga", LoadTGA_BGRA},
845         {"override/%s.png", PNG_LoadImage_BGRA},
846         {"override/%s.jpg", JPEG_LoadImage_BGRA},
847         {"override/%s.pcx", LoadPCX_BGRA},
848         {"%s.tga", LoadTGA_BGRA},
849         {"%s.png", PNG_LoadImage_BGRA},
850         {"%s.jpg", JPEG_LoadImage_BGRA},
851         {"%s.pcx", LoadPCX_BGRA},
852         {NULL, NULL}
853 };
854
855 imageformat_t imageformats_nopath[] =
856 {
857         {"override/%s.tga", LoadTGA_BGRA},
858         {"override/%s.png", PNG_LoadImage_BGRA},
859         {"override/%s.jpg", JPEG_LoadImage_BGRA},
860         {"textures/%s.tga", LoadTGA_BGRA},
861         {"textures/%s.png", PNG_LoadImage_BGRA},
862         {"textures/%s.jpg", JPEG_LoadImage_BGRA},
863         {"%s.tga", LoadTGA_BGRA},
864         {"%s.png", PNG_LoadImage_BGRA},
865         {"%s.jpg", JPEG_LoadImage_BGRA},
866         {"%s.pcx", LoadPCX_BGRA},
867         {NULL, NULL}
868 };
869
870 // GAME_DELUXEQUAKE only
871 // VorteX: the point why i use such messy texture paths is
872 // that GtkRadiant can't detect normal/gloss textures
873 // and exclude them from texture browser
874 // so i just use additional folder to store this textures
875 imageformat_t imageformats_dq[] =
876 {
877         {"%s.tga", LoadTGA_BGRA},
878         {"%s.jpg", JPEG_LoadImage_BGRA},
879         {"texturemaps/%s.tga", LoadTGA_BGRA},
880         {"texturemaps/%s.jpg", JPEG_LoadImage_BGRA},
881         {NULL, NULL}
882 };
883
884 imageformat_t imageformats_textures[] =
885 {
886         {"%s.tga", LoadTGA_BGRA},
887         {"%s.png", PNG_LoadImage_BGRA},
888         {"%s.jpg", JPEG_LoadImage_BGRA},
889         {"%s.pcx", LoadPCX_BGRA},
890         {"%s.wal", LoadWAL_BGRA},
891         {NULL, NULL}
892 };
893
894 imageformat_t imageformats_gfx[] =
895 {
896         {"%s.tga", LoadTGA_BGRA},
897         {"%s.png", PNG_LoadImage_BGRA},
898         {"%s.jpg", JPEG_LoadImage_BGRA},
899         {"%s.pcx", LoadPCX_BGRA},
900         {NULL, NULL}
901 };
902
903 imageformat_t imageformats_other[] =
904 {
905         {"%s.tga", LoadTGA_BGRA},
906         {"%s.png", PNG_LoadImage_BGRA},
907         {"%s.jpg", JPEG_LoadImage_BGRA},
908         {"%s.pcx", LoadPCX_BGRA},
909         {NULL, NULL}
910 };
911
912 int fixtransparentpixels(unsigned char *data, int w, int h);
913 unsigned char *loadimagepixelsbgra (const char *filename, qboolean complain, qboolean allowFixtrans, qboolean convertsRGB, int *miplevel)
914 {
915         fs_offset_t filesize;
916         imageformat_t *firstformat, *format;
917         unsigned char *f, *data = NULL, *data2 = NULL;
918         char basename[MAX_QPATH], name[MAX_QPATH], name2[MAX_QPATH], *c;
919         //if (developer_memorydebug.integer)
920         //      Mem_CheckSentinelsGlobal();
921         if (developer_texturelogging.integer)
922                 Log_Printf("textures.log", "%s\n", filename);
923         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
924         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
925         for (c = basename;*c;c++)
926                 if (*c == '*')
927                         *c = '#';
928         name[0] = 0;
929         if (strchr(basename, '/'))
930         {
931                 int i;
932                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
933                         name[i] = basename[i];
934                 name[i] = 0;
935         }
936         if (gamemode == GAME_TENEBRAE)
937                 firstformat = imageformats_tenebrae;
938         else if (gamemode == GAME_DELUXEQUAKE)
939                 firstformat = imageformats_dq;
940         else if (!strcasecmp(name, "textures"))
941                 firstformat = imageformats_textures;
942         else if (!strcasecmp(name, "gfx"))
943                 firstformat = imageformats_gfx;
944         else if (!strchr(basename, '/'))
945                 firstformat = imageformats_nopath;
946         else
947                 firstformat = imageformats_other;
948         // now try all the formats in the selected list
949         for (format = firstformat;format->formatstring;format++)
950         {
951                 dpsnprintf (name, sizeof(name), format->formatstring, basename);
952                 f = FS_LoadFile(name, tempmempool, true, &filesize);
953                 if (f)
954                 {
955                         int mymiplevel = miplevel ? *miplevel : 0;
956                         data = format->loadfunc(f, (int)filesize, &mymiplevel);
957                         Mem_Free(f);
958                         if (data)
959                         {
960                                 if(format->loadfunc == JPEG_LoadImage_BGRA) // jpeg can't do alpha, so let's simulate it by loading another jpeg
961                                 {
962                                         dpsnprintf (name2, sizeof(name2), format->formatstring, va("%s_alpha", basename));
963                                         f = FS_LoadFile(name2, tempmempool, true, &filesize);
964                                         if(f)
965                                         {
966                                                 int mymiplevel2 = miplevel ? *miplevel : 0;
967                                                 data2 = format->loadfunc(f, (int)filesize, &mymiplevel2);
968                                                 if(mymiplevel != mymiplevel2)
969                                                         Host_Error("loadimagepixelsbgra: miplevels differ");
970                                                 Mem_Free(f);
971                                                 Image_CopyAlphaFromBlueBGRA(data, data2, image_width, image_height);
972                                                 Mem_Free(data2);
973                                         }
974                                 }
975                                 if (developer_loading.integer)
976                                         Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
977                                 if(miplevel)
978                                         *miplevel = mymiplevel;
979                                 //if (developer_memorydebug.integer)
980                                 //      Mem_CheckSentinelsGlobal();
981                                 if(allowFixtrans && r_fixtrans_auto.integer)
982                                 {
983                                         int n = fixtransparentpixels(data, image_width, image_height);
984                                         if(n)
985                                         {
986                                                 Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
987                                                 if(r_fixtrans_auto.integer >= 2)
988                                                 {
989                                                         char outfilename[MAX_QPATH], buf[MAX_QPATH];
990                                                         Image_StripImageExtension(name, buf, sizeof(buf));
991                                                         dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
992                                                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
993                                                         Con_Printf("- %s written.\n", outfilename);
994                                                 }
995                                         }
996                                 }
997                                 if (convertsRGB)
998                                         Image_MakeLinearColorsFromsRGB(data, data, image_width * image_height);
999                                 return data;
1000                         }
1001                         else
1002                                 Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
1003                 }
1004         }
1005         if (complain)
1006         {
1007                 Con_Printf("Couldn't load %s using ", filename);
1008                 for (format = firstformat;format->formatstring;format++)
1009                 {
1010                         dpsnprintf (name, sizeof(name), format->formatstring, basename);
1011                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
1012                 }
1013         }
1014
1015         // texture loading can take a while, so make sure we're sending keepalives
1016         CL_KeepaliveMessage(false);
1017
1018         //if (developer_memorydebug.integer)
1019         //      Mem_CheckSentinelsGlobal();
1020         return NULL;
1021 }
1022
1023 extern cvar_t gl_picmip;
1024 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans, qboolean sRGB)
1025 {
1026         unsigned char *data;
1027         rtexture_t *rt;
1028         int miplevel = R_PicmipForFlags(flags);
1029         if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans, false, &miplevel)))
1030                 return 0;
1031         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, sRGB ? TEXTYPE_SRGB_BGRA : TEXTYPE_BGRA, flags, miplevel, NULL);
1032         Mem_Free(data);
1033         return rt;
1034 }
1035
1036 int fixtransparentpixels(unsigned char *data, int w, int h)
1037 {
1038         int const FIXTRANS_NEEDED = 1;
1039         int const FIXTRANS_HAS_L = 2;
1040         int const FIXTRANS_HAS_R = 4;
1041         int const FIXTRANS_HAS_U = 8;
1042         int const FIXTRANS_HAS_D = 16;
1043         int const FIXTRANS_FIXED = 32;
1044         unsigned char *fixMask = (unsigned char *) Mem_Alloc(tempmempool, w * h);
1045         int fixPixels = 0;
1046         int changedPixels = 0;
1047         int x, y;
1048
1049 #define FIXTRANS_PIXEL (y*w+x)
1050 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
1051 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
1052 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
1053 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
1054
1055         memset(fixMask, 0, w * h);
1056         for(y = 0; y < h; ++y)
1057                 for(x = 0; x < w; ++x)
1058                 {
1059                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
1060                         {
1061                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
1062                                 ++fixPixels;
1063                         }
1064                         else
1065                         {
1066                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1067                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1068                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1069                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1070                         }
1071                 }
1072         if(fixPixels == w * h)
1073                 return 0; // sorry, can't do anything about this
1074         while(fixPixels)
1075         {
1076                 for(y = 0; y < h; ++y)
1077                         for(x = 0; x < w; ++x)
1078                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
1079                                 {
1080                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
1081                                         unsigned char r, g, b, a, r0, g0, b0;
1082                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
1083                                         {
1084                                                 r = data[FIXTRANS_PIXEL_U * 4 + 2];
1085                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
1086                                                 b = data[FIXTRANS_PIXEL_U * 4 + 0];
1087                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
1088                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1089                                         }
1090                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
1091                                         {
1092                                                 r = data[FIXTRANS_PIXEL_D * 4 + 2];
1093                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
1094                                                 b = data[FIXTRANS_PIXEL_D * 4 + 0];
1095                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
1096                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1097                                         }
1098                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
1099                                         {
1100                                                 r = data[FIXTRANS_PIXEL_L * 4 + 2];
1101                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
1102                                                 b = data[FIXTRANS_PIXEL_L * 4 + 0];
1103                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
1104                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1105                                         }
1106                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
1107                                         {
1108                                                 r = data[FIXTRANS_PIXEL_R * 4 + 2];
1109                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
1110                                                 b = data[FIXTRANS_PIXEL_R * 4 + 0];
1111                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
1112                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1113                                         }
1114                                         if(!cnt)
1115                                                 continue;
1116                                         r0 = data[FIXTRANS_PIXEL * 4 + 2];
1117                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
1118                                         b0 = data[FIXTRANS_PIXEL * 4 + 0];
1119                                         if(sumA)
1120                                         {
1121                                                 // there is a surrounding non-alpha pixel
1122                                                 r = (sumRA + sumA / 2) / sumA;
1123                                                 g = (sumGA + sumA / 2) / sumA;
1124                                                 b = (sumBA + sumA / 2) / sumA;
1125                                         }
1126                                         else
1127                                         {
1128                                                 // need to use a "regular" average
1129                                                 r = (sumR + cnt / 2) / cnt;
1130                                                 g = (sumG + cnt / 2) / cnt;
1131                                                 b = (sumB + cnt / 2) / cnt;
1132                                         }
1133                                         if(r != r0 || g != g0 || b != b0)
1134                                                 ++changedPixels;
1135                                         data[FIXTRANS_PIXEL * 4 + 2] = r;
1136                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
1137                                         data[FIXTRANS_PIXEL * 4 + 0] = b;
1138                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
1139                                 }
1140                 for(y = 0; y < h; ++y)
1141                         for(x = 0; x < w; ++x)
1142                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
1143                                 {
1144                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
1145                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1146                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1147                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1148                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1149                                         --fixPixels;
1150                                 }
1151         }
1152         return changedPixels;
1153 }
1154
1155 void Image_FixTransparentPixels_f(void)
1156 {
1157         const char *filename, *filename_pattern;
1158         fssearch_t *search;
1159         int i, n;
1160         char outfilename[MAX_QPATH], buf[MAX_QPATH];
1161         unsigned char *data;
1162         if(Cmd_Argc() != 2)
1163         {
1164                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
1165                 return;
1166         }
1167         filename_pattern = Cmd_Argv(1);
1168         search = FS_Search(filename_pattern, true, true);
1169         if(!search)
1170                 return;
1171         for(i = 0; i < search->numfilenames; ++i)
1172         {
1173                 filename = search->filenames[i];
1174                 Con_Printf("Processing %s... ", filename);
1175                 Image_StripImageExtension(filename, buf, sizeof(buf));
1176                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1177                 if(!(data = loadimagepixelsbgra(filename, true, false, false, NULL)))
1178                         return;
1179                 if((n = fixtransparentpixels(data, image_width, image_height)))
1180                 {
1181                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1182                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1183                 }
1184                 else
1185                         Con_Printf("unchanged.\n");
1186                 Mem_Free(data);
1187         }
1188         FS_FreeSearch(search);
1189 }
1190
1191 qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data)
1192 {
1193         qboolean ret;
1194         unsigned char buffer[18];
1195         const void *buffers[2];
1196         fs_offset_t sizes[2];
1197
1198         memset (buffer, 0, 18);
1199         buffer[2] = 2;          // uncompressed type
1200         buffer[12] = (width >> 0) & 0xFF;
1201         buffer[13] = (width >> 8) & 0xFF;
1202         buffer[14] = (height >> 0) & 0xFF;
1203         buffer[15] = (height >> 8) & 0xFF;
1204         buffer[16] = 24;        // pixel size
1205
1206         buffers[0] = buffer;
1207         sizes[0] = 18;
1208         buffers[1] = data;
1209         sizes[1] = width*height*3;
1210         ret = FS_WriteFileInBlocks(filename, buffers, sizes, 2);
1211
1212         return ret;
1213 }
1214
1215 qboolean Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
1216 {
1217         int y;
1218         unsigned char *buffer, *out;
1219         const unsigned char *in, *end;
1220         qboolean ret;
1221
1222         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1223
1224         memset (buffer, 0, 18);
1225         buffer[2] = 2;          // uncompressed type
1226         buffer[12] = (width >> 0) & 0xFF;
1227         buffer[13] = (width >> 8) & 0xFF;
1228         buffer[14] = (height >> 0) & 0xFF;
1229         buffer[15] = (height >> 8) & 0xFF;
1230
1231         for (y = 3;y < width*height*4;y += 4)
1232                 if (data[y] < 255)
1233                         break;
1234
1235         if (y < width*height*4)
1236         {
1237                 // save the alpha channel
1238                 buffer[16] = 32;        // pixel size
1239                 buffer[17] = 8; // 8 bits of alpha
1240
1241                 // flip upside down
1242                 out = buffer + 18;
1243                 for (y = height - 1;y >= 0;y--)
1244                 {
1245                         memcpy(out, data + y * width * 4, width * 4);
1246                         out += width*4;
1247                 }
1248         }
1249         else
1250         {
1251                 // save only the color channels
1252                 buffer[16] = 24;        // pixel size
1253                 buffer[17] = 0; // 8 bits of alpha
1254
1255                 // truncate bgra to bgr and flip upside down
1256                 out = buffer + 18;
1257                 for (y = height - 1;y >= 0;y--)
1258                 {
1259                         in = data + y * width * 4;
1260                         end = in + width * 4;
1261                         for (;in < end;in += 4)
1262                         {
1263                                 *out++ = in[0];
1264                                 *out++ = in[1];
1265                                 *out++ = in[2];
1266                         }
1267                 }
1268         }
1269         ret = FS_WriteFile (filename, buffer, out - buffer);
1270
1271         Mem_Free(buffer);
1272
1273         return ret;
1274 }
1275
1276 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1277 {
1278         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1279         fstep = (int) (inwidth*65536.0f/outwidth);
1280         endx = (inwidth-1);
1281         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1282         {
1283                 xi = f >> 16;
1284                 if (xi != oldx)
1285                 {
1286                         in += (xi - oldx) * 4;
1287                         oldx = xi;
1288                 }
1289                 if (xi < endx)
1290                 {
1291                         lerp = f & 0xFFFF;
1292                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1293                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1294                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1295                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1296                 }
1297                 else // last pixel of the line has no pixel to lerp to
1298                 {
1299                         *out++ = in[0];
1300                         *out++ = in[1];
1301                         *out++ = in[2];
1302                         *out++ = in[3];
1303                 }
1304         }
1305 }
1306
1307 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1308 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1309 {
1310         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1311         unsigned char *out;
1312         const unsigned char *inrow;
1313         unsigned char *resamplerow1;
1314         unsigned char *resamplerow2;
1315         out = (unsigned char *)outdata;
1316         fstep = (int) (inheight*65536.0f/outheight);
1317
1318         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1319         resamplerow2 = resamplerow1 + outwidth*4;
1320
1321         inrow = (const unsigned char *)indata;
1322         oldy = 0;
1323         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1324         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1325         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1326         {
1327                 yi = f >> 16;
1328                 if (yi < endy)
1329                 {
1330                         lerp = f & 0xFFFF;
1331                         if (yi != oldy)
1332                         {
1333                                 inrow = (unsigned char *)indata + inwidth4*yi;
1334                                 if (yi == oldy+1)
1335                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1336                                 else
1337                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1338                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1339                                 oldy = yi;
1340                         }
1341                         j = outwidth - 4;
1342                         while(j >= 0)
1343                         {
1344                                 LERPBYTE( 0);
1345                                 LERPBYTE( 1);
1346                                 LERPBYTE( 2);
1347                                 LERPBYTE( 3);
1348                                 LERPBYTE( 4);
1349                                 LERPBYTE( 5);
1350                                 LERPBYTE( 6);
1351                                 LERPBYTE( 7);
1352                                 LERPBYTE( 8);
1353                                 LERPBYTE( 9);
1354                                 LERPBYTE(10);
1355                                 LERPBYTE(11);
1356                                 LERPBYTE(12);
1357                                 LERPBYTE(13);
1358                                 LERPBYTE(14);
1359                                 LERPBYTE(15);
1360                                 out += 16;
1361                                 resamplerow1 += 16;
1362                                 resamplerow2 += 16;
1363                                 j -= 4;
1364                         }
1365                         if (j & 2)
1366                         {
1367                                 LERPBYTE( 0);
1368                                 LERPBYTE( 1);
1369                                 LERPBYTE( 2);
1370                                 LERPBYTE( 3);
1371                                 LERPBYTE( 4);
1372                                 LERPBYTE( 5);
1373                                 LERPBYTE( 6);
1374                                 LERPBYTE( 7);
1375                                 out += 8;
1376                                 resamplerow1 += 8;
1377                                 resamplerow2 += 8;
1378                         }
1379                         if (j & 1)
1380                         {
1381                                 LERPBYTE( 0);
1382                                 LERPBYTE( 1);
1383                                 LERPBYTE( 2);
1384                                 LERPBYTE( 3);
1385                                 out += 4;
1386                                 resamplerow1 += 4;
1387                                 resamplerow2 += 4;
1388                         }
1389                         resamplerow1 -= outwidth4;
1390                         resamplerow2 -= outwidth4;
1391                 }
1392                 else
1393                 {
1394                         if (yi != oldy)
1395                         {
1396                                 inrow = (unsigned char *)indata + inwidth4*yi;
1397                                 if (yi == oldy+1)
1398                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1399                                 else
1400                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1401                                 oldy = yi;
1402                         }
1403                         memcpy(out, resamplerow1, outwidth4);
1404                 }
1405         }
1406
1407         Mem_Free(resamplerow1);
1408         resamplerow1 = NULL;
1409         resamplerow2 = NULL;
1410 }
1411
1412 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1413 {
1414         int i, j;
1415         unsigned frac, fracstep;
1416         // relies on int being 4 bytes
1417         int *inrow, *out;
1418         out = (int *)outdata;
1419
1420         fracstep = inwidth*0x10000/outwidth;
1421         for (i = 0;i < outheight;i++)
1422         {
1423                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1424                 frac = fracstep >> 1;
1425                 j = outwidth - 4;
1426                 while (j >= 0)
1427                 {
1428                         out[0] = inrow[frac >> 16];frac += fracstep;
1429                         out[1] = inrow[frac >> 16];frac += fracstep;
1430                         out[2] = inrow[frac >> 16];frac += fracstep;
1431                         out[3] = inrow[frac >> 16];frac += fracstep;
1432                         out += 4;
1433                         j -= 4;
1434                 }
1435                 if (j & 2)
1436                 {
1437                         out[0] = inrow[frac >> 16];frac += fracstep;
1438                         out[1] = inrow[frac >> 16];frac += fracstep;
1439                         out += 2;
1440                 }
1441                 if (j & 1)
1442                 {
1443                         out[0] = inrow[frac >> 16];frac += fracstep;
1444                         out += 1;
1445                 }
1446         }
1447 }
1448
1449 /*
1450 ================
1451 Image_Resample
1452 ================
1453 */
1454 void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
1455 {
1456         if (indepth != 1 || outdepth != 1)
1457         {
1458                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1459                 return;
1460         }
1461         if (quality)
1462                 Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1463         else
1464                 Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1465 }
1466
1467 // in can be the same as out
1468 void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
1469 {
1470         const unsigned char *inrow;
1471         int x, y, nextrow;
1472         if (*depth != 1 || destdepth != 1)
1473         {
1474                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1475                 if (*width > destwidth)
1476                         *width >>= 1;
1477                 if (*height > destheight)
1478                         *height >>= 1;
1479                 if (*depth > destdepth)
1480                         *depth >>= 1;
1481                 return;
1482         }
1483         // note: if given odd width/height this discards the last row/column of
1484         // pixels, rather than doing a proper box-filter scale down
1485         inrow = in;
1486         nextrow = *width * 4;
1487         if (*width > destwidth)
1488         {
1489                 *width >>= 1;
1490                 if (*height > destheight)
1491                 {
1492                         // reduce both
1493                         *height >>= 1;
1494                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1495                         {
1496                                 for (in = inrow, x = 0;x < *width;x++)
1497                                 {
1498                                         out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1499                                         out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1500                                         out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1501                                         out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1502                                         out += 4;
1503                                         in += 8;
1504                                 }
1505                         }
1506                 }
1507                 else
1508                 {
1509                         // reduce width
1510                         for (y = 0;y < *height;y++, inrow += nextrow)
1511                         {
1512                                 for (in = inrow, x = 0;x < *width;x++)
1513                                 {
1514                                         out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1515                                         out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1516                                         out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1517                                         out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1518                                         out += 4;
1519                                         in += 8;
1520                                 }
1521                         }
1522                 }
1523         }
1524         else
1525         {
1526                 if (*height > destheight)
1527                 {
1528                         // reduce height
1529                         *height >>= 1;
1530                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1531                         {
1532                                 for (in = inrow, x = 0;x < *width;x++)
1533                                 {
1534                                         out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1535                                         out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1536                                         out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1537                                         out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1538                                         out += 4;
1539                                         in += 4;
1540                                 }
1541                         }
1542                 }
1543                 else
1544                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1545         }
1546 }
1547
1548 void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1549 {
1550         int x, y, x1, x2, y1, y2;
1551         const unsigned char *b, *row[3];
1552         int p[5];
1553         unsigned char *out;
1554         float ibumpscale, n[3];
1555         ibumpscale = (255.0f * 6.0f) / bumpscale;
1556         out = outpixels;
1557         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1558         {
1559                 y2 = y + 1;if (y2 >= height) y2 = 0;
1560                 row[0] = inpixels + (y1 * width) * 4;
1561                 row[1] = inpixels + (y  * width) * 4;
1562                 row[2] = inpixels + (y2 * width) * 4;
1563                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1564                 {
1565                         x2 = x + 1;if (x2 >= width) x2 = 0;
1566                         // left, right
1567                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1568                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1569                         // above, below
1570                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1571                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1572                         // center
1573                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1574                         // calculate a normal from the slopes
1575                         n[0] = p[0] - p[1];
1576                         n[1] = p[3] - p[2];
1577                         n[2] = ibumpscale;
1578                         VectorNormalize(n);
1579                         // turn it into a dot3 rgb vector texture
1580                         out[2] = (int)(128.0f + n[0] * 127.0f);
1581                         out[1] = (int)(128.0f + n[1] * 127.0f);
1582                         out[0] = (int)(128.0f + n[2] * 127.0f);
1583                         out[3] = (p[4]) / 3;
1584                         out += 4;
1585                 }
1586         }
1587 }