Merge branch 'master' into blub/cmd_unset
[divverent/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)
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 > 4096 || image_height > 4096 || 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)
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 > 4096 || image_height > 4096 || 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                 break;
614         case 10:
615                 // BGR or BGRA, RLE
616                 if (targa_header.pixel_size == 32 && alphabits)
617                 {
618                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
619                         {
620                                 for (x = 0;x < image_width;)
621                                 {
622                                         if (fin >= enddata)
623                                                 break; // error - truncated file
624                                         runlen = *fin++;
625                                         if (runlen & 0x80)
626                                         {
627                                                 // RLE - all pixels the same color
628                                                 runlen += 1 - 0x80;
629                                                 if (fin + pix_inc > enddata)
630                                                         break; // error - truncated file
631                                                 if (x + runlen > image_width)
632                                                         break; // error - line exceeds width
633                                                 bgra.b[0] = fin[0];
634                                                 bgra.b[1] = fin[1];
635                                                 bgra.b[2] = fin[2];
636                                                 bgra.b[3] = fin[3];
637                                                 fin += pix_inc;
638                                                 for (;runlen--;x++)
639                                                         *pixbufi++ = bgra.i;
640                                         }
641                                         else
642                                         {
643                                                 // uncompressed - all pixels different color
644                                                 runlen++;
645                                                 if (fin + pix_inc * runlen > enddata)
646                                                         break; // error - truncated file
647                                                 if (x + runlen > image_width)
648                                                         break; // error - line exceeds width
649                                                 for (;runlen--;x++)
650                                                 {
651                                                         bgra.b[0] = fin[0];
652                                                         bgra.b[1] = fin[1];
653                                                         bgra.b[2] = fin[2];
654                                                         bgra.b[3] = fin[3];
655                                                         fin += pix_inc;
656                                                         *pixbufi++ = bgra.i;
657                                                 }
658                                         }
659                                 }
660                         }
661                 }
662                 else
663                 {
664                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
665                         {
666                                 for (x = 0;x < image_width;)
667                                 {
668                                         if (fin >= enddata)
669                                                 break; // error - truncated file
670                                         runlen = *fin++;
671                                         if (runlen & 0x80)
672                                         {
673                                                 // RLE - all pixels the same color
674                                                 runlen += 1 - 0x80;
675                                                 if (fin + pix_inc > enddata)
676                                                         break; // error - truncated file
677                                                 if (x + runlen > image_width)
678                                                         break; // error - line exceeds width
679                                                 bgra.b[0] = fin[0];
680                                                 bgra.b[1] = fin[1];
681                                                 bgra.b[2] = fin[2];
682                                                 bgra.b[3] = 255;
683                                                 fin += pix_inc;
684                                                 for (;runlen--;x++)
685                                                         *pixbufi++ = bgra.i;
686                                         }
687                                         else
688                                         {
689                                                 // uncompressed - all pixels different color
690                                                 runlen++;
691                                                 if (fin + pix_inc * runlen > enddata)
692                                                         break; // error - truncated file
693                                                 if (x + runlen > image_width)
694                                                         break; // error - line exceeds width
695                                                 for (;runlen--;x++)
696                                                 {
697                                                         bgra.b[0] = fin[0];
698                                                         bgra.b[1] = fin[1];
699                                                         bgra.b[2] = fin[2];
700                                                         bgra.b[3] = 255;
701                                                         fin += pix_inc;
702                                                         *pixbufi++ = bgra.i;
703                                                 }
704                                         }
705                                 }
706                         }
707                 }
708                 break;
709         default:
710                 // unknown image_type
711                 break;
712         }
713
714         return image_buffer;
715 }
716
717 typedef struct q2wal_s
718 {
719         char            name[32];
720         unsigned        width, height;
721         unsigned        offsets[MIPLEVELS];             // four mip maps stored
722         char            animname[32];                   // next frame in animation chain
723         int                     flags;
724         int                     contents;
725         int                     value;
726 } q2wal_t;
727
728 unsigned char *LoadWAL_BGRA (const unsigned char *f, int filesize)
729 {
730         unsigned char *image_buffer;
731         const q2wal_t *inwal = (const q2wal_t *)f;
732
733         if (filesize < (int) sizeof(q2wal_t))
734         {
735                 Con_Print("LoadWAL: invalid WAL file\n");
736                 return NULL;
737         }
738
739         image_width = LittleLong(inwal->width);
740         image_height = LittleLong(inwal->height);
741         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
742         {
743                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
744                 return NULL;
745         }
746
747         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
748         {
749                 Con_Print("LoadWAL: invalid WAL file\n");
750                 return NULL;
751         }
752
753         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
754         if (!image_buffer)
755         {
756                 Con_Printf("LoadWAL: not enough memory for %i by %i image\n", image_width, image_height);
757                 return NULL;
758         }
759         Image_Copy8bitBGRA(f + LittleLong(inwal->offsets[0]), image_buffer, image_width * image_height, palette_bgra_complete);
760         return image_buffer;
761 }
762
763
764 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
765 {
766         const char *ext;
767
768         if (size_out == 0)
769                 return;
770
771         ext = FS_FileExtension(in);
772         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
773                 FS_StripExtension(in, out, size_out);
774         else
775                 strlcpy(out, in, size_out);
776 }
777
778 static unsigned char image_linearfromsrgb[256];
779
780 void Image_MakeLinearColorsFromsRGB(unsigned char *pout, const unsigned char *pin, int numpixels)
781 {
782         int i;
783         // this math from http://www.opengl.org/registry/specs/EXT/texture_sRGB.txt
784         if (!image_linearfromsrgb[255])
785                 for (i = 0;i < 256;i++)
786                         image_linearfromsrgb[i] = i < 11 ? (int)(i / 12.92f) : (int)(pow((i/256.0f + 0.055f)/1.0555f, 2.4)*256.0f);
787         for (i = 0;i < numpixels;i++)
788         {
789                 pout[i*4+0] = image_linearfromsrgb[pin[i*4+0]];
790                 pout[i*4+1] = image_linearfromsrgb[pin[i*4+1]];
791                 pout[i*4+2] = image_linearfromsrgb[pin[i*4+2]];
792                 pout[i*4+3] = pin[i*4+3];
793         }
794 }
795
796 typedef struct imageformat_s
797 {
798         const char *formatstring;
799         unsigned char *(*loadfunc)(const unsigned char *f, int filesize);
800 }
801 imageformat_t;
802
803 // GAME_TENEBRAE only
804 imageformat_t imageformats_tenebrae[] =
805 {
806         {"override/%s.tga", LoadTGA_BGRA},
807         {"override/%s.png", PNG_LoadImage_BGRA},
808         {"override/%s.jpg", JPEG_LoadImage_BGRA},
809         {"override/%s.pcx", LoadPCX_BGRA},
810         {"%s.tga", LoadTGA_BGRA},
811         {"%s.png", PNG_LoadImage_BGRA},
812         {"%s.jpg", JPEG_LoadImage_BGRA},
813         {"%s.pcx", LoadPCX_BGRA},
814         {NULL, NULL}
815 };
816
817 imageformat_t imageformats_nopath[] =
818 {
819         {"override/%s.tga", LoadTGA_BGRA},
820         {"override/%s.png", PNG_LoadImage_BGRA},
821         {"override/%s.jpg", JPEG_LoadImage_BGRA},
822         {"textures/%s.tga", LoadTGA_BGRA},
823         {"textures/%s.png", PNG_LoadImage_BGRA},
824         {"textures/%s.jpg", JPEG_LoadImage_BGRA},
825         {"%s.tga", LoadTGA_BGRA},
826         {"%s.png", PNG_LoadImage_BGRA},
827         {"%s.jpg", JPEG_LoadImage_BGRA},
828         {"%s.pcx", LoadPCX_BGRA},
829         {NULL, NULL}
830 };
831
832 // GAME_DELUXEQUAKE only
833 // VorteX: the point why i use such messy texture paths is
834 // that GtkRadiant can't detect normal/gloss textures
835 // and exclude them from texture browser
836 // so i just use additional folder to store this textures
837 imageformat_t imageformats_dq[] =
838 {
839         {"%s.tga", LoadTGA_BGRA},
840         {"%s.jpg", JPEG_LoadImage_BGRA},
841         {"texturemaps/%s.tga", LoadTGA_BGRA},
842         {"texturemaps/%s.jpg", JPEG_LoadImage_BGRA},
843         {NULL, NULL}
844 };
845
846 imageformat_t imageformats_textures[] =
847 {
848         {"%s.tga", LoadTGA_BGRA},
849         {"%s.png", PNG_LoadImage_BGRA},
850         {"%s.jpg", JPEG_LoadImage_BGRA},
851         {"%s.pcx", LoadPCX_BGRA},
852         {"%s.wal", LoadWAL_BGRA},
853         {NULL, NULL}
854 };
855
856 imageformat_t imageformats_gfx[] =
857 {
858         {"%s.tga", LoadTGA_BGRA},
859         {"%s.png", PNG_LoadImage_BGRA},
860         {"%s.jpg", JPEG_LoadImage_BGRA},
861         {"%s.pcx", LoadPCX_BGRA},
862         {NULL, NULL}
863 };
864
865 imageformat_t imageformats_other[] =
866 {
867         {"%s.tga", LoadTGA_BGRA},
868         {"%s.png", PNG_LoadImage_BGRA},
869         {"%s.jpg", JPEG_LoadImage_BGRA},
870         {"%s.pcx", LoadPCX_BGRA},
871         {NULL, NULL}
872 };
873
874 int fixtransparentpixels(unsigned char *data, int w, int h);
875 unsigned char *loadimagepixelsbgra (const char *filename, qboolean complain, qboolean allowFixtrans, qboolean convertsRGB)
876 {
877         fs_offset_t filesize;
878         imageformat_t *firstformat, *format;
879         unsigned char *f, *data = NULL, *data2 = NULL;
880         char basename[MAX_QPATH], name[MAX_QPATH], name2[MAX_QPATH], *c;
881         //if (developer_memorydebug.integer)
882         //      Mem_CheckSentinelsGlobal();
883         if (developer_texturelogging.integer)
884                 Log_Printf("textures.log", "%s\n", filename);
885         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
886         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
887         for (c = basename;*c;c++)
888                 if (*c == '*')
889                         *c = '#';
890         name[0] = 0;
891         if (strchr(basename, '/'))
892         {
893                 int i;
894                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
895                         name[i] = basename[i];
896                 name[i] = 0;
897         }
898         if (gamemode == GAME_TENEBRAE)
899                 firstformat = imageformats_tenebrae;
900         else if (gamemode == GAME_DELUXEQUAKE)
901                 firstformat = imageformats_dq;
902         else if (!strcasecmp(name, "textures"))
903                 firstformat = imageformats_textures;
904         else if (!strcasecmp(name, "gfx"))
905                 firstformat = imageformats_gfx;
906         else if (!strchr(basename, '/'))
907                 firstformat = imageformats_nopath;
908         else
909                 firstformat = imageformats_other;
910         // now try all the formats in the selected list
911         for (format = firstformat;format->formatstring;format++)
912         {
913                 dpsnprintf (name, sizeof(name), format->formatstring, basename);
914                 f = FS_LoadFile(name, tempmempool, true, &filesize);
915                 if (f)
916                 {
917                         data = format->loadfunc(f, (int)filesize);
918                         Mem_Free(f);
919                         if(format->loadfunc == JPEG_LoadImage_BGRA) // jpeg can't do alpha, so let's simulate it by loading another jpeg
920                         {
921                                 dpsnprintf (name2, sizeof(name2), format->formatstring, va("%s_alpha", basename));
922                                 f = FS_LoadFile(name2, tempmempool, true, &filesize);
923                                 if(f)
924                                 {
925                                         data2 = format->loadfunc(f, (int)filesize);
926                                         Mem_Free(f);
927                                         Image_CopyAlphaFromBlueBGRA(data, data2, image_width, image_height);
928                                         Mem_Free(data2);
929                                 }
930                         }
931                         if (data)
932                         {
933                                 if (developer_loading.integer)
934                                         Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
935                                 //if (developer_memorydebug.integer)
936                                 //      Mem_CheckSentinelsGlobal();
937                                 if(allowFixtrans && r_fixtrans_auto.integer)
938                                 {
939                                         int n = fixtransparentpixels(data, image_width, image_height);
940                                         if(n)
941                                         {
942                                                 Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
943                                                 if(r_fixtrans_auto.integer >= 2)
944                                                 {
945                                                         char outfilename[MAX_QPATH], buf[MAX_QPATH];
946                                                         Image_StripImageExtension(name, buf, sizeof(buf));
947                                                         dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
948                                                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
949                                                         Con_Printf("- %s written.\n", outfilename);
950                                                 }
951                                         }
952                                 }
953                                 if (convertsRGB)
954                                         Image_MakeLinearColorsFromsRGB(data, data, image_width * image_height);
955                                 return data;
956                         }
957                         else
958                                 Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
959                 }
960         }
961         if (complain)
962         {
963                 Con_Printf("Couldn't load %s using ", filename);
964                 for (format = firstformat;format->formatstring;format++)
965                 {
966                         dpsnprintf (name, sizeof(name), format->formatstring, basename);
967                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
968                 }
969         }
970
971         // texture loading can take a while, so make sure we're sending keepalives
972         CL_KeepaliveMessage(false);
973
974         //if (developer_memorydebug.integer)
975         //      Mem_CheckSentinelsGlobal();
976         return NULL;
977 }
978
979 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans, qboolean convertsRGB)
980 {
981         unsigned char *data;
982         rtexture_t *rt;
983         if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans, convertsRGB)))
984                 return 0;
985         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_BGRA, flags, NULL);
986         Mem_Free(data);
987         return rt;
988 }
989
990 int fixtransparentpixels(unsigned char *data, int w, int h)
991 {
992         int const FIXTRANS_NEEDED = 1;
993         int const FIXTRANS_HAS_L = 2;
994         int const FIXTRANS_HAS_R = 4;
995         int const FIXTRANS_HAS_U = 8;
996         int const FIXTRANS_HAS_D = 16;
997         int const FIXTRANS_FIXED = 32;
998         unsigned char *fixMask = (unsigned char *) Mem_Alloc(tempmempool, w * h);
999         int fixPixels = 0;
1000         int changedPixels = 0;
1001         int x, y;
1002
1003 #define FIXTRANS_PIXEL (y*w+x)
1004 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
1005 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
1006 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
1007 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
1008
1009         memset(fixMask, 0, w * h);
1010         for(y = 0; y < h; ++y)
1011                 for(x = 0; x < w; ++x)
1012                 {
1013                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
1014                         {
1015                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
1016                                 ++fixPixels;
1017                         }
1018                         else
1019                         {
1020                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1021                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1022                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1023                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1024                         }
1025                 }
1026         if(fixPixels == w * h)
1027                 return 0; // sorry, can't do anything about this
1028         while(fixPixels)
1029         {
1030                 for(y = 0; y < h; ++y)
1031                         for(x = 0; x < w; ++x)
1032                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
1033                                 {
1034                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
1035                                         unsigned char r, g, b, a, r0, g0, b0;
1036                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
1037                                         {
1038                                                 r = data[FIXTRANS_PIXEL_U * 4 + 2];
1039                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
1040                                                 b = data[FIXTRANS_PIXEL_U * 4 + 0];
1041                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
1042                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1043                                         }
1044                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
1045                                         {
1046                                                 r = data[FIXTRANS_PIXEL_D * 4 + 2];
1047                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
1048                                                 b = data[FIXTRANS_PIXEL_D * 4 + 0];
1049                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
1050                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1051                                         }
1052                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
1053                                         {
1054                                                 r = data[FIXTRANS_PIXEL_L * 4 + 2];
1055                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
1056                                                 b = data[FIXTRANS_PIXEL_L * 4 + 0];
1057                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
1058                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1059                                         }
1060                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
1061                                         {
1062                                                 r = data[FIXTRANS_PIXEL_R * 4 + 2];
1063                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
1064                                                 b = data[FIXTRANS_PIXEL_R * 4 + 0];
1065                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
1066                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
1067                                         }
1068                                         if(!cnt)
1069                                                 continue;
1070                                         r0 = data[FIXTRANS_PIXEL * 4 + 2];
1071                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
1072                                         b0 = data[FIXTRANS_PIXEL * 4 + 0];
1073                                         if(sumA)
1074                                         {
1075                                                 // there is a surrounding non-alpha pixel
1076                                                 r = (sumRA + sumA / 2) / sumA;
1077                                                 g = (sumGA + sumA / 2) / sumA;
1078                                                 b = (sumBA + sumA / 2) / sumA;
1079                                         }
1080                                         else
1081                                         {
1082                                                 // need to use a "regular" average
1083                                                 r = (sumR + cnt / 2) / cnt;
1084                                                 g = (sumG + cnt / 2) / cnt;
1085                                                 b = (sumB + cnt / 2) / cnt;
1086                                         }
1087                                         if(r != r0 || g != g0 || b != b0)
1088                                                 ++changedPixels;
1089                                         data[FIXTRANS_PIXEL * 4 + 2] = r;
1090                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
1091                                         data[FIXTRANS_PIXEL * 4 + 0] = b;
1092                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
1093                                 }
1094                 for(y = 0; y < h; ++y)
1095                         for(x = 0; x < w; ++x)
1096                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
1097                                 {
1098                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
1099                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1100                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1101                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1102                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1103                                         --fixPixels;
1104                                 }
1105         }
1106         return changedPixels;
1107 }
1108
1109 void Image_FixTransparentPixels_f(void)
1110 {
1111         const char *filename, *filename_pattern;
1112         fssearch_t *search;
1113         int i, n;
1114         char outfilename[MAX_QPATH], buf[MAX_QPATH];
1115         unsigned char *data;
1116         if(Cmd_Argc() != 2)
1117         {
1118                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
1119                 return;
1120         }
1121         filename_pattern = Cmd_Argv(1);
1122         search = FS_Search(filename_pattern, true, true);
1123         if(!search)
1124                 return;
1125         for(i = 0; i < search->numfilenames; ++i)
1126         {
1127                 filename = search->filenames[i];
1128                 Con_Printf("Processing %s... ", filename);
1129                 Image_StripImageExtension(filename, buf, sizeof(buf));
1130                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1131                 if(!(data = loadimagepixelsbgra(filename, true, false, false)))
1132                         return;
1133                 if((n = fixtransparentpixels(data, image_width, image_height)))
1134                 {
1135                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1136                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1137                 }
1138                 else
1139                         Con_Printf("unchanged.\n");
1140                 Mem_Free(data);
1141         }
1142         FS_FreeSearch(search);
1143 }
1144
1145 qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
1146 {
1147         qboolean ret;
1148
1149         memset (buffer, 0, 18);
1150         buffer[2] = 2;          // uncompressed type
1151         buffer[12] = (width >> 0) & 0xFF;
1152         buffer[13] = (width >> 8) & 0xFF;
1153         buffer[14] = (height >> 0) & 0xFF;
1154         buffer[15] = (height >> 8) & 0xFF;
1155         buffer[16] = 24;        // pixel size
1156
1157         // swap rgb to bgr
1158         memcpy(buffer + 18, data, width*height*3);
1159         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
1160
1161         return ret;
1162 }
1163
1164 void Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
1165 {
1166         int y;
1167         unsigned char *buffer, *out;
1168         const unsigned char *in, *end;
1169
1170         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1171
1172         memset (buffer, 0, 18);
1173         buffer[2] = 2;          // uncompressed type
1174         buffer[12] = (width >> 0) & 0xFF;
1175         buffer[13] = (width >> 8) & 0xFF;
1176         buffer[14] = (height >> 0) & 0xFF;
1177         buffer[15] = (height >> 8) & 0xFF;
1178
1179         for (y = 3;y < width*height*4;y += 4)
1180                 if (data[y] < 255)
1181                         break;
1182
1183         if (y < width*height*4)
1184         {
1185                 // save the alpha channel
1186                 buffer[16] = 32;        // pixel size
1187                 buffer[17] = 8; // 8 bits of alpha
1188
1189                 // flip upside down
1190                 out = buffer + 18;
1191                 for (y = height - 1;y >= 0;y--)
1192                 {
1193                         memcpy(out, data + y * width * 4, width * 4);
1194                         out += width*4;
1195                 }
1196         }
1197         else
1198         {
1199                 // save only the color channels
1200                 buffer[16] = 24;        // pixel size
1201                 buffer[17] = 0; // 8 bits of alpha
1202
1203                 // truncate bgra to bgr and flip upside down
1204                 out = buffer + 18;
1205                 for (y = height - 1;y >= 0;y--)
1206                 {
1207                         in = data + y * width * 4;
1208                         end = in + width * 4;
1209                         for (;in < end;in += 4)
1210                         {
1211                                 *out++ = in[0];
1212                                 *out++ = in[1];
1213                                 *out++ = in[2];
1214                         }
1215                 }
1216         }
1217         FS_WriteFile (filename, buffer, out - buffer);
1218
1219         Mem_Free(buffer);
1220 }
1221
1222 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1223 {
1224         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1225         fstep = (int) (inwidth*65536.0f/outwidth);
1226         endx = (inwidth-1);
1227         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1228         {
1229                 xi = f >> 16;
1230                 if (xi != oldx)
1231                 {
1232                         in += (xi - oldx) * 4;
1233                         oldx = xi;
1234                 }
1235                 if (xi < endx)
1236                 {
1237                         lerp = f & 0xFFFF;
1238                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1239                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1240                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1241                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1242                 }
1243                 else // last pixel of the line has no pixel to lerp to
1244                 {
1245                         *out++ = in[0];
1246                         *out++ = in[1];
1247                         *out++ = in[2];
1248                         *out++ = in[3];
1249                 }
1250         }
1251 }
1252
1253 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1254 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1255 {
1256         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1257         unsigned char *out;
1258         const unsigned char *inrow;
1259         unsigned char *resamplerow1;
1260         unsigned char *resamplerow2;
1261         out = (unsigned char *)outdata;
1262         fstep = (int) (inheight*65536.0f/outheight);
1263
1264         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1265         resamplerow2 = resamplerow1 + outwidth*4;
1266
1267         inrow = (const unsigned char *)indata;
1268         oldy = 0;
1269         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1270         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1271         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1272         {
1273                 yi = f >> 16;
1274                 if (yi < endy)
1275                 {
1276                         lerp = f & 0xFFFF;
1277                         if (yi != oldy)
1278                         {
1279                                 inrow = (unsigned char *)indata + inwidth4*yi;
1280                                 if (yi == oldy+1)
1281                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1282                                 else
1283                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1284                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1285                                 oldy = yi;
1286                         }
1287                         j = outwidth - 4;
1288                         while(j >= 0)
1289                         {
1290                                 LERPBYTE( 0);
1291                                 LERPBYTE( 1);
1292                                 LERPBYTE( 2);
1293                                 LERPBYTE( 3);
1294                                 LERPBYTE( 4);
1295                                 LERPBYTE( 5);
1296                                 LERPBYTE( 6);
1297                                 LERPBYTE( 7);
1298                                 LERPBYTE( 8);
1299                                 LERPBYTE( 9);
1300                                 LERPBYTE(10);
1301                                 LERPBYTE(11);
1302                                 LERPBYTE(12);
1303                                 LERPBYTE(13);
1304                                 LERPBYTE(14);
1305                                 LERPBYTE(15);
1306                                 out += 16;
1307                                 resamplerow1 += 16;
1308                                 resamplerow2 += 16;
1309                                 j -= 4;
1310                         }
1311                         if (j & 2)
1312                         {
1313                                 LERPBYTE( 0);
1314                                 LERPBYTE( 1);
1315                                 LERPBYTE( 2);
1316                                 LERPBYTE( 3);
1317                                 LERPBYTE( 4);
1318                                 LERPBYTE( 5);
1319                                 LERPBYTE( 6);
1320                                 LERPBYTE( 7);
1321                                 out += 8;
1322                                 resamplerow1 += 8;
1323                                 resamplerow2 += 8;
1324                         }
1325                         if (j & 1)
1326                         {
1327                                 LERPBYTE( 0);
1328                                 LERPBYTE( 1);
1329                                 LERPBYTE( 2);
1330                                 LERPBYTE( 3);
1331                                 out += 4;
1332                                 resamplerow1 += 4;
1333                                 resamplerow2 += 4;
1334                         }
1335                         resamplerow1 -= outwidth4;
1336                         resamplerow2 -= outwidth4;
1337                 }
1338                 else
1339                 {
1340                         if (yi != oldy)
1341                         {
1342                                 inrow = (unsigned char *)indata + inwidth4*yi;
1343                                 if (yi == oldy+1)
1344                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1345                                 else
1346                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1347                                 oldy = yi;
1348                         }
1349                         memcpy(out, resamplerow1, outwidth4);
1350                 }
1351         }
1352
1353         Mem_Free(resamplerow1);
1354         resamplerow1 = NULL;
1355         resamplerow2 = NULL;
1356 }
1357
1358 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1359 {
1360         int i, j;
1361         unsigned frac, fracstep;
1362         // relies on int being 4 bytes
1363         int *inrow, *out;
1364         out = (int *)outdata;
1365
1366         fracstep = inwidth*0x10000/outwidth;
1367         for (i = 0;i < outheight;i++)
1368         {
1369                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1370                 frac = fracstep >> 1;
1371                 j = outwidth - 4;
1372                 while (j >= 0)
1373                 {
1374                         out[0] = inrow[frac >> 16];frac += fracstep;
1375                         out[1] = inrow[frac >> 16];frac += fracstep;
1376                         out[2] = inrow[frac >> 16];frac += fracstep;
1377                         out[3] = inrow[frac >> 16];frac += fracstep;
1378                         out += 4;
1379                         j -= 4;
1380                 }
1381                 if (j & 2)
1382                 {
1383                         out[0] = inrow[frac >> 16];frac += fracstep;
1384                         out[1] = inrow[frac >> 16];frac += fracstep;
1385                         out += 2;
1386                 }
1387                 if (j & 1)
1388                 {
1389                         out[0] = inrow[frac >> 16];frac += fracstep;
1390                         out += 1;
1391                 }
1392         }
1393 }
1394
1395 /*
1396 ================
1397 Image_Resample
1398 ================
1399 */
1400 void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
1401 {
1402         if (indepth != 1 || outdepth != 1)
1403         {
1404                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1405                 return;
1406         }
1407         if (quality)
1408                 Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1409         else
1410                 Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1411 }
1412
1413 // in can be the same as out
1414 void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
1415 {
1416         const unsigned char *inrow;
1417         int x, y, nextrow;
1418         if (*depth != 1 || destdepth != 1)
1419         {
1420                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1421                 if (*width > destwidth)
1422                         *width >>= 1;
1423                 if (*height > destheight)
1424                         *height >>= 1;
1425                 if (*depth > destdepth)
1426                         *depth >>= 1;
1427                 return;
1428         }
1429         // note: if given odd width/height this discards the last row/column of
1430         // pixels, rather than doing a proper box-filter scale down
1431         inrow = in;
1432         nextrow = *width * 4;
1433         if (*width > destwidth)
1434         {
1435                 *width >>= 1;
1436                 if (*height > destheight)
1437                 {
1438                         // reduce both
1439                         *height >>= 1;
1440                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1441                         {
1442                                 for (in = inrow, x = 0;x < *width;x++)
1443                                 {
1444                                         out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1445                                         out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1446                                         out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1447                                         out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1448                                         out += 4;
1449                                         in += 8;
1450                                 }
1451                         }
1452                 }
1453                 else
1454                 {
1455                         // reduce width
1456                         for (y = 0;y < *height;y++, inrow += nextrow)
1457                         {
1458                                 for (in = inrow, x = 0;x < *width;x++)
1459                                 {
1460                                         out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1461                                         out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1462                                         out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1463                                         out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1464                                         out += 4;
1465                                         in += 8;
1466                                 }
1467                         }
1468                 }
1469         }
1470         else
1471         {
1472                 if (*height > destheight)
1473                 {
1474                         // reduce height
1475                         *height >>= 1;
1476                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1477                         {
1478                                 for (in = inrow, x = 0;x < *width;x++)
1479                                 {
1480                                         out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1481                                         out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1482                                         out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1483                                         out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1484                                         out += 4;
1485                                         in += 4;
1486                                 }
1487                         }
1488                 }
1489                 else
1490                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1491         }
1492 }
1493
1494 void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1495 {
1496         int x, y, x1, x2, y1, y2;
1497         const unsigned char *b, *row[3];
1498         int p[5];
1499         unsigned char *out;
1500         float ibumpscale, n[3];
1501         ibumpscale = (255.0f * 6.0f) / bumpscale;
1502         out = outpixels;
1503         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1504         {
1505                 y2 = y + 1;if (y2 >= height) y2 = 0;
1506                 row[0] = inpixels + (y1 * width) * 4;
1507                 row[1] = inpixels + (y  * width) * 4;
1508                 row[2] = inpixels + (y2 * width) * 4;
1509                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1510                 {
1511                         x2 = x + 1;if (x2 >= width) x2 = 0;
1512                         // left, right
1513                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1514                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1515                         // above, below
1516                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1517                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1518                         // center
1519                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1520                         // calculate a normal from the slopes
1521                         n[0] = p[0] - p[1];
1522                         n[1] = p[3] - p[2];
1523                         n[2] = ibumpscale;
1524                         VectorNormalize(n);
1525                         // turn it into a dot3 rgb vector texture
1526                         out[2] = (int)(128.0f + n[0] * 127.0f);
1527                         out[1] = (int)(128.0f + n[1] * 127.0f);
1528                         out[0] = (int)(128.0f + n[2] * 127.0f);
1529                         out[3] = (p[4]) / 3;
1530                         out += 4;
1531                 }
1532         }
1533 }