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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
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 static 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 static 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)floor(Image_LinearFloatFromsRGB(i) * 255.0f + 0.5f);
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)floor(bound(0.0f, Image_sRGBFloatFromLinear_Lightmap(i), 1.0f) * 255.0f + 0.5f);
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         char vabuf[1024];
920         //if (developer_memorydebug.integer)
921         //      Mem_CheckSentinelsGlobal();
922         if (developer_texturelogging.integer)
923                 Log_Printf("textures.log", "%s\n", filename);
924         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
925         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
926         for (c = basename;*c;c++)
927                 if (*c == '*')
928                         *c = '#';
929         name[0] = 0;
930         if (strchr(basename, '/'))
931         {
932                 int i;
933                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
934                         name[i] = basename[i];
935                 name[i] = 0;
936         }
937         if (gamemode == GAME_TENEBRAE)
938                 firstformat = imageformats_tenebrae;
939         else if (gamemode == GAME_DELUXEQUAKE)
940                 firstformat = imageformats_dq;
941         else if (!strcasecmp(name, "textures"))
942                 firstformat = imageformats_textures;
943         else if (!strcasecmp(name, "gfx"))
944                 firstformat = imageformats_gfx;
945         else if (!strchr(basename, '/'))
946                 firstformat = imageformats_nopath;
947         else
948                 firstformat = imageformats_other;
949         // now try all the formats in the selected list
950         for (format = firstformat;format->formatstring;format++)
951         {
952                 dpsnprintf (name, sizeof(name), format->formatstring, basename);
953                 f = FS_LoadFile(name, tempmempool, true, &filesize);
954                 if (f)
955                 {
956                         int mymiplevel = miplevel ? *miplevel : 0;
957                         data = format->loadfunc(f, (int)filesize, &mymiplevel);
958                         Mem_Free(f);
959                         if (data)
960                         {
961                                 if(format->loadfunc == JPEG_LoadImage_BGRA) // jpeg can't do alpha, so let's simulate it by loading another jpeg
962                                 {
963                                         dpsnprintf (name2, sizeof(name2), format->formatstring, va(vabuf, sizeof(vabuf), "%s_alpha", basename));
964                                         f = FS_LoadFile(name2, tempmempool, true, &filesize);
965                                         if(f)
966                                         {
967                                                 int mymiplevel2 = miplevel ? *miplevel : 0;
968                                                 data2 = format->loadfunc(f, (int)filesize, &mymiplevel2);
969                                                 if(data2 && mymiplevel == mymiplevel2)
970                                                         Image_CopyAlphaFromBlueBGRA(data, data2, image_width, image_height);
971                                                 else
972                                                         Con_Printf("loadimagepixelsrgba: corrupt or invalid alpha image %s_alpha\n", basename);
973                                                 if(data2)
974                                                         Mem_Free(data2);
975                                                 Mem_Free(f);
976                                         }
977                                 }
978                                 if (developer_loading.integer)
979                                         Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
980                                 if(miplevel)
981                                         *miplevel = mymiplevel;
982                                 //if (developer_memorydebug.integer)
983                                 //      Mem_CheckSentinelsGlobal();
984                                 if(allowFixtrans && r_fixtrans_auto.integer)
985                                 {
986                                         int n = fixtransparentpixels(data, image_width, image_height);
987                                         if(n)
988                                         {
989                                                 Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
990                                                 if(r_fixtrans_auto.integer >= 2)
991                                                 {
992                                                         char outfilename[MAX_QPATH], buf[MAX_QPATH];
993                                                         Image_StripImageExtension(name, buf, sizeof(buf));
994                                                         dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
995                                                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
996                                                         Con_Printf("- %s written.\n", outfilename);
997                                                 }
998                                         }
999                                 }
1000                                 if (convertsRGB)
1001                                         Image_MakeLinearColorsFromsRGB(data, data, image_width * image_height);
1002                                 return data;
1003                         }
1004                         else
1005                                 Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
1006                 }
1007         }
1008         if (complain)
1009         {
1010                 Con_Printf("Couldn't load %s using ", filename);
1011                 for (format = firstformat;format->formatstring;format++)
1012                 {
1013                         dpsnprintf (name, sizeof(name), format->formatstring, basename);
1014                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
1015                 }
1016         }
1017
1018         // texture loading can take a while, so make sure we're sending keepalives
1019         CL_KeepaliveMessage(false);
1020
1021         //if (developer_memorydebug.integer)
1022         //      Mem_CheckSentinelsGlobal();
1023         return NULL;
1024 }
1025
1026 extern cvar_t gl_picmip;
1027 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans, qboolean sRGB)
1028 {
1029         unsigned char *data;
1030         rtexture_t *rt;
1031         int miplevel = R_PicmipForFlags(flags);
1032         if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans, false, &miplevel)))
1033                 return 0;
1034         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, sRGB ? TEXTYPE_SRGB_BGRA : TEXTYPE_BGRA, flags, miplevel, NULL);
1035         Mem_Free(data);
1036         return rt;
1037 }
1038
1039 int fixtransparentpixels(unsigned char *data, int w, int h)
1040 {
1041         int const FIXTRANS_NEEDED = 1;
1042         int const FIXTRANS_HAS_L = 2;
1043         int const FIXTRANS_HAS_R = 4;
1044         int const FIXTRANS_HAS_U = 8;
1045         int const FIXTRANS_HAS_D = 16;
1046         int const FIXTRANS_FIXED = 32;
1047         unsigned char *fixMask = (unsigned char *) Mem_Alloc(tempmempool, w * h);
1048         int fixPixels = 0;
1049         int changedPixels = 0;
1050         int x, y;
1051
1052 #define FIXTRANS_PIXEL (y*w+x)
1053 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
1054 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
1055 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
1056 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
1057
1058         memset(fixMask, 0, w * h);
1059         for(y = 0; y < h; ++y)
1060                 for(x = 0; x < w; ++x)
1061                 {
1062                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
1063                         {
1064                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
1065                                 ++fixPixels;
1066                         }
1067                         else
1068                         {
1069                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1070                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1071                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1072                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1073                         }
1074                 }
1075         if(fixPixels == w * h)
1076                 return 0; // sorry, can't do anything about this
1077         while(fixPixels)
1078         {
1079                 for(y = 0; y < h; ++y)
1080                         for(x = 0; x < w; ++x)
1081                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
1082                                 {
1083                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
1084                                         unsigned char r, g, b, a, r0, g0, b0;
1085                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
1086                                         {
1087                                                 r = data[FIXTRANS_PIXEL_U * 4 + 2];
1088                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
1089                                                 b = data[FIXTRANS_PIXEL_U * 4 + 0];
1090                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
1091                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1092                                         }
1093                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
1094                                         {
1095                                                 r = data[FIXTRANS_PIXEL_D * 4 + 2];
1096                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
1097                                                 b = data[FIXTRANS_PIXEL_D * 4 + 0];
1098                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
1099                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1100                                         }
1101                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
1102                                         {
1103                                                 r = data[FIXTRANS_PIXEL_L * 4 + 2];
1104                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
1105                                                 b = data[FIXTRANS_PIXEL_L * 4 + 0];
1106                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
1107                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1108                                         }
1109                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
1110                                         {
1111                                                 r = data[FIXTRANS_PIXEL_R * 4 + 2];
1112                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
1113                                                 b = data[FIXTRANS_PIXEL_R * 4 + 0];
1114                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
1115                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1116                                         }
1117                                         if(!cnt)
1118                                                 continue;
1119                                         r0 = data[FIXTRANS_PIXEL * 4 + 2];
1120                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
1121                                         b0 = data[FIXTRANS_PIXEL * 4 + 0];
1122                                         if(sumA)
1123                                         {
1124                                                 // there is a surrounding non-alpha pixel
1125                                                 r = (sumRA + sumA / 2) / sumA;
1126                                                 g = (sumGA + sumA / 2) / sumA;
1127                                                 b = (sumBA + sumA / 2) / sumA;
1128                                         }
1129                                         else
1130                                         {
1131                                                 // need to use a "regular" average
1132                                                 r = (sumR + cnt / 2) / cnt;
1133                                                 g = (sumG + cnt / 2) / cnt;
1134                                                 b = (sumB + cnt / 2) / cnt;
1135                                         }
1136                                         if(r != r0 || g != g0 || b != b0)
1137                                                 ++changedPixels;
1138                                         data[FIXTRANS_PIXEL * 4 + 2] = r;
1139                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
1140                                         data[FIXTRANS_PIXEL * 4 + 0] = b;
1141                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
1142                                 }
1143                 for(y = 0; y < h; ++y)
1144                         for(x = 0; x < w; ++x)
1145                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
1146                                 {
1147                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
1148                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1149                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1150                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1151                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1152                                         --fixPixels;
1153                                 }
1154         }
1155         return changedPixels;
1156 }
1157
1158 void Image_FixTransparentPixels_f(void)
1159 {
1160         const char *filename, *filename_pattern;
1161         fssearch_t *search;
1162         int i, n;
1163         char outfilename[MAX_QPATH], buf[MAX_QPATH];
1164         unsigned char *data;
1165         if(Cmd_Argc() != 2)
1166         {
1167                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
1168                 return;
1169         }
1170         filename_pattern = Cmd_Argv(1);
1171         search = FS_Search(filename_pattern, true, true);
1172         if(!search)
1173                 return;
1174         for(i = 0; i < search->numfilenames; ++i)
1175         {
1176                 filename = search->filenames[i];
1177                 Con_Printf("Processing %s... ", filename);
1178                 Image_StripImageExtension(filename, buf, sizeof(buf));
1179                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1180                 if(!(data = loadimagepixelsbgra(filename, true, false, false, NULL)))
1181                         return;
1182                 if((n = fixtransparentpixels(data, image_width, image_height)))
1183                 {
1184                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1185                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1186                 }
1187                 else
1188                         Con_Printf("unchanged.\n");
1189                 Mem_Free(data);
1190         }
1191         FS_FreeSearch(search);
1192 }
1193
1194 qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data)
1195 {
1196         qboolean ret;
1197         unsigned char buffer[18];
1198         const void *buffers[2];
1199         fs_offset_t sizes[2];
1200
1201         memset (buffer, 0, 18);
1202         buffer[2] = 2;          // uncompressed type
1203         buffer[12] = (width >> 0) & 0xFF;
1204         buffer[13] = (width >> 8) & 0xFF;
1205         buffer[14] = (height >> 0) & 0xFF;
1206         buffer[15] = (height >> 8) & 0xFF;
1207         buffer[16] = 24;        // pixel size
1208
1209         buffers[0] = buffer;
1210         sizes[0] = 18;
1211         buffers[1] = data;
1212         sizes[1] = width*height*3;
1213         ret = FS_WriteFileInBlocks(filename, buffers, sizes, 2);
1214
1215         return ret;
1216 }
1217
1218 qboolean Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
1219 {
1220         int y;
1221         unsigned char *buffer, *out;
1222         const unsigned char *in, *end;
1223         qboolean ret;
1224
1225         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1226
1227         memset (buffer, 0, 18);
1228         buffer[2] = 2;          // uncompressed type
1229         buffer[12] = (width >> 0) & 0xFF;
1230         buffer[13] = (width >> 8) & 0xFF;
1231         buffer[14] = (height >> 0) & 0xFF;
1232         buffer[15] = (height >> 8) & 0xFF;
1233
1234         for (y = 3;y < width*height*4;y += 4)
1235                 if (data[y] < 255)
1236                         break;
1237
1238         if (y < width*height*4)
1239         {
1240                 // save the alpha channel
1241                 buffer[16] = 32;        // pixel size
1242                 buffer[17] = 8; // 8 bits of alpha
1243
1244                 // flip upside down
1245                 out = buffer + 18;
1246                 for (y = height - 1;y >= 0;y--)
1247                 {
1248                         memcpy(out, data + y * width * 4, width * 4);
1249                         out += width*4;
1250                 }
1251         }
1252         else
1253         {
1254                 // save only the color channels
1255                 buffer[16] = 24;        // pixel size
1256                 buffer[17] = 0; // 8 bits of alpha
1257
1258                 // truncate bgra to bgr and flip upside down
1259                 out = buffer + 18;
1260                 for (y = height - 1;y >= 0;y--)
1261                 {
1262                         in = data + y * width * 4;
1263                         end = in + width * 4;
1264                         for (;in < end;in += 4)
1265                         {
1266                                 *out++ = in[0];
1267                                 *out++ = in[1];
1268                                 *out++ = in[2];
1269                         }
1270                 }
1271         }
1272         ret = FS_WriteFile (filename, buffer, out - buffer);
1273
1274         Mem_Free(buffer);
1275
1276         return ret;
1277 }
1278
1279 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1280 {
1281         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1282         fstep = (int) (inwidth*65536.0f/outwidth);
1283         endx = (inwidth-1);
1284         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1285         {
1286                 xi = f >> 16;
1287                 if (xi != oldx)
1288                 {
1289                         in += (xi - oldx) * 4;
1290                         oldx = xi;
1291                 }
1292                 if (xi < endx)
1293                 {
1294                         lerp = f & 0xFFFF;
1295                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1296                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1297                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1298                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1299                 }
1300                 else // last pixel of the line has no pixel to lerp to
1301                 {
1302                         *out++ = in[0];
1303                         *out++ = in[1];
1304                         *out++ = in[2];
1305                         *out++ = in[3];
1306                 }
1307         }
1308 }
1309
1310 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1311 static void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1312 {
1313         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1314         unsigned char *out;
1315         const unsigned char *inrow;
1316         unsigned char *resamplerow1;
1317         unsigned char *resamplerow2;
1318         out = (unsigned char *)outdata;
1319         fstep = (int) (inheight*65536.0f/outheight);
1320
1321         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1322         resamplerow2 = resamplerow1 + outwidth*4;
1323
1324         inrow = (const unsigned char *)indata;
1325         oldy = 0;
1326         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1327         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1328         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1329         {
1330                 yi = f >> 16;
1331                 if (yi < endy)
1332                 {
1333                         lerp = f & 0xFFFF;
1334                         if (yi != oldy)
1335                         {
1336                                 inrow = (unsigned char *)indata + inwidth4*yi;
1337                                 if (yi == oldy+1)
1338                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1339                                 else
1340                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1341                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1342                                 oldy = yi;
1343                         }
1344                         j = outwidth - 4;
1345                         while(j >= 0)
1346                         {
1347                                 LERPBYTE( 0);
1348                                 LERPBYTE( 1);
1349                                 LERPBYTE( 2);
1350                                 LERPBYTE( 3);
1351                                 LERPBYTE( 4);
1352                                 LERPBYTE( 5);
1353                                 LERPBYTE( 6);
1354                                 LERPBYTE( 7);
1355                                 LERPBYTE( 8);
1356                                 LERPBYTE( 9);
1357                                 LERPBYTE(10);
1358                                 LERPBYTE(11);
1359                                 LERPBYTE(12);
1360                                 LERPBYTE(13);
1361                                 LERPBYTE(14);
1362                                 LERPBYTE(15);
1363                                 out += 16;
1364                                 resamplerow1 += 16;
1365                                 resamplerow2 += 16;
1366                                 j -= 4;
1367                         }
1368                         if (j & 2)
1369                         {
1370                                 LERPBYTE( 0);
1371                                 LERPBYTE( 1);
1372                                 LERPBYTE( 2);
1373                                 LERPBYTE( 3);
1374                                 LERPBYTE( 4);
1375                                 LERPBYTE( 5);
1376                                 LERPBYTE( 6);
1377                                 LERPBYTE( 7);
1378                                 out += 8;
1379                                 resamplerow1 += 8;
1380                                 resamplerow2 += 8;
1381                         }
1382                         if (j & 1)
1383                         {
1384                                 LERPBYTE( 0);
1385                                 LERPBYTE( 1);
1386                                 LERPBYTE( 2);
1387                                 LERPBYTE( 3);
1388                                 out += 4;
1389                                 resamplerow1 += 4;
1390                                 resamplerow2 += 4;
1391                         }
1392                         resamplerow1 -= outwidth4;
1393                         resamplerow2 -= outwidth4;
1394                 }
1395                 else
1396                 {
1397                         if (yi != oldy)
1398                         {
1399                                 inrow = (unsigned char *)indata + inwidth4*yi;
1400                                 if (yi == oldy+1)
1401                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1402                                 else
1403                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1404                                 oldy = yi;
1405                         }
1406                         memcpy(out, resamplerow1, outwidth4);
1407                 }
1408         }
1409
1410         Mem_Free(resamplerow1);
1411         resamplerow1 = NULL;
1412         resamplerow2 = NULL;
1413 }
1414
1415 static void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1416 {
1417         int i, j;
1418         unsigned frac, fracstep;
1419         // relies on int being 4 bytes
1420         int *inrow, *out;
1421         out = (int *)outdata;
1422
1423         fracstep = inwidth*0x10000/outwidth;
1424         for (i = 0;i < outheight;i++)
1425         {
1426                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1427                 frac = fracstep >> 1;
1428                 j = outwidth - 4;
1429                 while (j >= 0)
1430                 {
1431                         out[0] = inrow[frac >> 16];frac += fracstep;
1432                         out[1] = inrow[frac >> 16];frac += fracstep;
1433                         out[2] = inrow[frac >> 16];frac += fracstep;
1434                         out[3] = inrow[frac >> 16];frac += fracstep;
1435                         out += 4;
1436                         j -= 4;
1437                 }
1438                 if (j & 2)
1439                 {
1440                         out[0] = inrow[frac >> 16];frac += fracstep;
1441                         out[1] = inrow[frac >> 16];frac += fracstep;
1442                         out += 2;
1443                 }
1444                 if (j & 1)
1445                 {
1446                         out[0] = inrow[frac >> 16];frac += fracstep;
1447                         out += 1;
1448                 }
1449         }
1450 }
1451
1452 /*
1453 ================
1454 Image_Resample
1455 ================
1456 */
1457 void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
1458 {
1459         if (indepth != 1 || outdepth != 1)
1460         {
1461                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1462                 return;
1463         }
1464         if (quality)
1465                 Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1466         else
1467                 Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1468 }
1469
1470 // in can be the same as out
1471 void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
1472 {
1473         const unsigned char *inrow;
1474         int x, y, nextrow;
1475         if (*depth != 1 || destdepth != 1)
1476         {
1477                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1478                 if (*width > destwidth)
1479                         *width >>= 1;
1480                 if (*height > destheight)
1481                         *height >>= 1;
1482                 if (*depth > destdepth)
1483                         *depth >>= 1;
1484                 return;
1485         }
1486         // note: if given odd width/height this discards the last row/column of
1487         // pixels, rather than doing a proper box-filter scale down
1488         inrow = in;
1489         nextrow = *width * 4;
1490         if (*width > destwidth)
1491         {
1492                 *width >>= 1;
1493                 if (*height > destheight)
1494                 {
1495                         // reduce both
1496                         *height >>= 1;
1497                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1498                         {
1499                                 for (in = inrow, x = 0;x < *width;x++)
1500                                 {
1501                                         out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1502                                         out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1503                                         out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1504                                         out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1505                                         out += 4;
1506                                         in += 8;
1507                                 }
1508                         }
1509                 }
1510                 else
1511                 {
1512                         // reduce width
1513                         for (y = 0;y < *height;y++, inrow += nextrow)
1514                         {
1515                                 for (in = inrow, x = 0;x < *width;x++)
1516                                 {
1517                                         out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1518                                         out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1519                                         out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1520                                         out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1521                                         out += 4;
1522                                         in += 8;
1523                                 }
1524                         }
1525                 }
1526         }
1527         else
1528         {
1529                 if (*height > destheight)
1530                 {
1531                         // reduce height
1532                         *height >>= 1;
1533                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1534                         {
1535                                 for (in = inrow, x = 0;x < *width;x++)
1536                                 {
1537                                         out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1538                                         out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1539                                         out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1540                                         out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1541                                         out += 4;
1542                                         in += 4;
1543                                 }
1544                         }
1545                 }
1546                 else
1547                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1548         }
1549 }
1550
1551 void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1552 {
1553         int x, y, x1, x2, y1, y2;
1554         const unsigned char *b, *row[3];
1555         int p[5];
1556         unsigned char *out;
1557         float ibumpscale, n[3];
1558         ibumpscale = (255.0f * 6.0f) / bumpscale;
1559         out = outpixels;
1560         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1561         {
1562                 y2 = y + 1;if (y2 >= height) y2 = 0;
1563                 row[0] = inpixels + (y1 * width) * 4;
1564                 row[1] = inpixels + (y  * width) * 4;
1565                 row[2] = inpixels + (y2 * width) * 4;
1566                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1567                 {
1568                         x2 = x + 1;if (x2 >= width) x2 = 0;
1569                         // left, right
1570                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1571                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1572                         // above, below
1573                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1574                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1575                         // center
1576                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1577                         // calculate a normal from the slopes
1578                         n[0] = p[0] - p[1];
1579                         n[1] = p[3] - p[2];
1580                         n[2] = ibumpscale;
1581                         VectorNormalize(n);
1582                         // turn it into a dot3 rgb vector texture
1583                         out[2] = (int)(128.0f + n[0] * 127.0f);
1584                         out[1] = (int)(128.0f + n[1] * 127.0f);
1585                         out[0] = (int)(128.0f + n[2] * 127.0f);
1586                         out[3] = (p[4]) / 3;
1587                         out += 4;
1588                 }
1589         }
1590 }