changed several DPrint's and developer cvar checks to higher developer cvar levels...
[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 #if 1
12 // written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
13 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)
14 {
15         int index, c, x, y;
16         const unsigned char *in, *line;
17         int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
18         int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);
19
20         for (c = 0; c < numoutputcomponents; c++)
21                 if (outputinputcomponentindices[c] & 0x80000000)
22                         break;
23         if (c < numoutputcomponents)
24         {
25                 // special indices used
26                 if (inputflipdiagonal)
27                 {
28                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
29                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
30                                         for (c = 0; c < numoutputcomponents; c++)
31                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
32                 }
33                 else
34                 {
35                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
36                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
37                                         for (c = 0; c < numoutputcomponents; c++)
38                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
39                 }
40         }
41         else
42         {
43                 // special indices not used
44                 if (inputflipdiagonal)
45                 {
46                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
47                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
48                                         for (c = 0; c < numoutputcomponents; c++)
49                                                 outpixels[c] = in[outputinputcomponentindices[c]];
50                 }
51                 else
52                 {
53                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
54                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
55                                         for (c = 0; c < numoutputcomponents; c++)
56                                                 outpixels[c] = in[outputinputcomponentindices[c]];
57                 }
58         }
59 }
60 #else
61 // intentionally readable version
62 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)
63 {
64         int index, c, x, y;
65         const unsigned char *in, *inrow, *incolumn;
66         if (inputflipdiagonal)
67         {
68                 for (x = 0;x < inputwidth;x++)
69                 {
70                         for (y = 0;y < inputheight;y++)
71                         {
72                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
73                                 for (c = 0;c < numoutputcomponents;c++)
74                                 {
75                                         index = outputinputcomponentindices[c];
76                                         if (index & 0x80000000)
77                                                 *outpixels++ = index;
78                                         else
79                                                 *outpixels++ = in[index];
80                                 }
81                         }
82                 }
83         }
84         else
85         {
86                 for (y = 0;y < inputheight;y++)
87                 {
88                         for (x = 0;x < inputwidth;x++)
89                         {
90                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
91                                 for (c = 0;c < numoutputcomponents;c++)
92                                 {
93                                         index = outputinputcomponentindices[c];
94                                         if (index & 0x80000000)
95                                                 *outpixels++ = index;
96                                         else
97                                                 *outpixels++ = in[index];
98                                 }
99                         }
100                 }
101         }
102 }
103 #endif
104
105 void Image_GammaRemapRGB(const unsigned char *in, unsigned char *out, int pixels, const unsigned char *gammar, const unsigned char *gammag, const unsigned char *gammab)
106 {
107         while (pixels--)
108         {
109                 out[0] = gammar[in[0]];
110                 out[1] = gammag[in[1]];
111                 out[2] = gammab[in[2]];
112                 in += 3;
113                 out += 3;
114         }
115 }
116
117 // note: pal must be 32bit color
118 void Image_Copy8bitRGBA(const unsigned char *in, unsigned char *out, int pixels, const unsigned int *pal)
119 {
120         int *iout = (int *)out;
121         while (pixels >= 8)
122         {
123                 iout[0] = pal[in[0]];
124                 iout[1] = pal[in[1]];
125                 iout[2] = pal[in[2]];
126                 iout[3] = pal[in[3]];
127                 iout[4] = pal[in[4]];
128                 iout[5] = pal[in[5]];
129                 iout[6] = pal[in[6]];
130                 iout[7] = pal[in[7]];
131                 in += 8;
132                 iout += 8;
133                 pixels -= 8;
134         }
135         if (pixels & 4)
136         {
137                 iout[0] = pal[in[0]];
138                 iout[1] = pal[in[1]];
139                 iout[2] = pal[in[2]];
140                 iout[3] = pal[in[3]];
141                 in += 4;
142                 iout += 4;
143         }
144         if (pixels & 2)
145         {
146                 iout[0] = pal[in[0]];
147                 iout[1] = pal[in[1]];
148                 in += 2;
149                 iout += 2;
150         }
151         if (pixels & 1)
152                 iout[0] = pal[in[0]];
153 }
154
155 /*
156 =================================================================
157
158   PCX Loading
159
160 =================================================================
161 */
162
163 typedef struct pcx_s
164 {
165     char        manufacturer;
166     char        version;
167     char        encoding;
168     char        bits_per_pixel;
169     unsigned short      xmin,ymin,xmax,ymax;
170     unsigned short      hres,vres;
171     unsigned char       palette[48];
172     char        reserved;
173     char        color_planes;
174     unsigned short      bytes_per_line;
175     unsigned short      palette_type;
176     char        filler[58];
177 } pcx_t;
178
179 /*
180 ============
181 LoadPCX
182 ============
183 */
184 unsigned char* LoadPCX (const unsigned char *f, int filesize, int matchwidth, int matchheight)
185 {
186         pcx_t pcx;
187         unsigned char *a, *b, *image_rgba, *pbuf;
188         const unsigned char *palette, *fin, *enddata;
189         int x, y, x2, dataByte;
190
191         if (filesize < (int)sizeof(pcx) + 768)
192         {
193                 Con_Print("Bad pcx file\n");
194                 return NULL;
195         }
196
197         fin = f;
198
199         memcpy(&pcx, fin, sizeof(pcx));
200         fin += sizeof(pcx);
201
202         // LordHavoc: big-endian support ported from QF newtree
203         pcx.xmax = LittleShort (pcx.xmax);
204         pcx.xmin = LittleShort (pcx.xmin);
205         pcx.ymax = LittleShort (pcx.ymax);
206         pcx.ymin = LittleShort (pcx.ymin);
207         pcx.hres = LittleShort (pcx.hres);
208         pcx.vres = LittleShort (pcx.vres);
209         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
210         pcx.palette_type = LittleShort (pcx.palette_type);
211
212         image_width = pcx.xmax + 1 - pcx.xmin;
213         image_height = pcx.ymax + 1 - pcx.ymin;
214         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)
215         {
216                 Con_Print("Bad pcx file\n");
217                 return NULL;
218         }
219         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
220                 return NULL;
221
222         palette = f + filesize - 768;
223
224         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
225         if (!image_rgba)
226         {
227                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
228                 return NULL;
229         }
230         pbuf = image_rgba + image_width*image_height*3;
231         enddata = palette;
232
233         for (y = 0;y < image_height && fin < enddata;y++)
234         {
235                 a = pbuf + y * image_width;
236                 for (x = 0;x < image_width && fin < enddata;)
237                 {
238                         dataByte = *fin++;
239                         if(dataByte >= 0xC0)
240                         {
241                                 if (fin >= enddata)
242                                         break;
243                                 x2 = x + (dataByte & 0x3F);
244                                 dataByte = *fin++;
245                                 if (x2 > image_width)
246                                         x2 = image_width; // technically an error
247                                 while(x < x2)
248                                         a[x++] = dataByte;
249                         }
250                         else
251                                 a[x++] = dataByte;
252                 }
253                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
254                 while(x < image_width)
255                         a[x++] = 0;
256         }
257
258         a = image_rgba;
259         b = pbuf;
260
261         for(x = 0;x < image_width*image_height;x++)
262         {
263                 y = *b++ * 3;
264                 *a++ = palette[y];
265                 *a++ = palette[y+1];
266                 *a++ = palette[y+2];
267                 *a++ = 255;
268         }
269
270         return image_rgba;
271 }
272
273 /*
274 =========================================================
275
276 TARGA LOADING
277
278 =========================================================
279 */
280
281 typedef struct _TargaHeader
282 {
283         unsigned char   id_length, colormap_type, image_type;
284         unsigned short  colormap_index, colormap_length;
285         unsigned char   colormap_size;
286         unsigned short  x_origin, y_origin, width, height;
287         unsigned char   pixel_size, attributes;
288 }
289 TargaHeader;
290
291 void PrintTargaHeader(TargaHeader *t)
292 {
293         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);
294 }
295
296 /*
297 =============
298 LoadTGA
299 =============
300 */
301 unsigned char *LoadTGA (const unsigned char *f, int filesize, int matchwidth, int matchheight)
302 {
303         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex, alphabits;
304         unsigned char *pixbuf, *image_rgba;
305         const unsigned char *fin, *enddata;
306         unsigned char *p;
307         TargaHeader targa_header;
308         unsigned char palette[256*4];
309
310         if (filesize < 19)
311                 return NULL;
312
313         enddata = f + filesize;
314
315         targa_header.id_length = f[0];
316         targa_header.colormap_type = f[1];
317         targa_header.image_type = f[2];
318
319         targa_header.colormap_index = f[3] + f[4] * 256;
320         targa_header.colormap_length = f[5] + f[6] * 256;
321         targa_header.colormap_size = f[7];
322         targa_header.x_origin = f[8] + f[9] * 256;
323         targa_header.y_origin = f[10] + f[11] * 256;
324         targa_header.width = image_width = f[12] + f[13] * 256;
325         targa_header.height = image_height = f[14] + f[15] * 256;
326         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
327         {
328                 Con_Print("LoadTGA: invalid size\n");
329                 PrintTargaHeader(&targa_header);
330                 return NULL;
331         }
332         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
333                 return NULL;
334         targa_header.pixel_size = f[16];
335         targa_header.attributes = f[17];
336
337         // advance to end of header
338         fin = f + 18;
339
340         // skip TARGA image comment (usually 0 bytes)
341         fin += targa_header.id_length;
342
343         // read/skip the colormap if present (note: according to the TARGA spec it
344         // can be present even on truecolor or greyscale images, just not used by
345         // the image data)
346         if (targa_header.colormap_type)
347         {
348                 if (targa_header.colormap_length > 256)
349                 {
350                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
351                         PrintTargaHeader(&targa_header);
352                         return NULL;
353                 }
354                 if (targa_header.colormap_index)
355                 {
356                         Con_Print("LoadTGA: colormap_index not supported\n");
357                         PrintTargaHeader(&targa_header);
358                         return NULL;
359                 }
360                 if (targa_header.colormap_size == 24)
361                 {
362                         for (x = 0;x < targa_header.colormap_length;x++)
363                         {
364                                 palette[x*4+2] = *fin++;
365                                 palette[x*4+1] = *fin++;
366                                 palette[x*4+0] = *fin++;
367                                 palette[x*4+3] = 255;
368                         }
369                 }
370                 else if (targa_header.colormap_size == 32)
371                 {
372                         for (x = 0;x < targa_header.colormap_length;x++)
373                         {
374                                 palette[x*4+2] = *fin++;
375                                 palette[x*4+1] = *fin++;
376                                 palette[x*4+0] = *fin++;
377                                 palette[x*4+3] = *fin++;
378                         }
379                 }
380                 else
381                 {
382                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
383                         PrintTargaHeader(&targa_header);
384                         return NULL;
385                 }
386         }
387
388         // check our pixel_size restrictions according to image_type
389         if (targa_header.image_type == 2 || targa_header.image_type == 10)
390         {
391                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
392                 {
393                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
394                         PrintTargaHeader(&targa_header);
395                         return NULL;
396                 }
397         }
398         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
399         {
400                 if (targa_header.pixel_size != 8)
401                 {
402                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
403                         PrintTargaHeader(&targa_header);
404                         return NULL;
405                 }
406         }
407         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
408         {
409                 if (targa_header.pixel_size != 8)
410                 {
411                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
412                         PrintTargaHeader(&targa_header);
413                         return NULL;
414                 }
415         }
416         else
417         {
418                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
419                 PrintTargaHeader(&targa_header);
420                 return NULL;
421         }
422
423         if (targa_header.attributes & 0x10)
424         {
425                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
426                 return NULL;
427         }
428
429         // number of attribute bits per pixel, we only support 0 or 8
430         alphabits = targa_header.attributes & 0x0F;
431         if (alphabits != 8 && alphabits != 0)
432         {
433                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
434                 return NULL;
435         }
436
437         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
438         if (!image_rgba)
439         {
440                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
441                 return NULL;
442         }
443
444         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
445         if ((targa_header.attributes & 0x20) == 0)
446         {
447                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
448                 row_inc = -image_width*4*2;
449         }
450         else
451         {
452                 pixbuf = image_rgba;
453                 row_inc = 0;
454         }
455
456         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
457         x = 0;
458         y = 0;
459         red = green = blue = alpha = 255;
460         while (y < image_height)
461         {
462                 // decoder is mostly the same whether it's compressed or not
463                 readpixelcount = 1000000;
464                 runlen = 1000000;
465                 if (compressed && fin < enddata)
466                 {
467                         runlen = *fin++;
468                         // high bit indicates this is an RLE compressed run
469                         if (runlen & 0x80)
470                                 readpixelcount = 1;
471                         runlen = 1 + (runlen & 0x7f);
472                 }
473
474                 while((runlen--) && y < image_height)
475                 {
476                         if (readpixelcount > 0)
477                         {
478                                 readpixelcount--;
479                                 red = green = blue = alpha = 255;
480                                 if (fin < enddata)
481                                 {
482                                         switch(targa_header.image_type)
483                                         {
484                                         case 1:
485                                         case 9:
486                                                 // colormapped
487                                                 pindex = *fin++;
488                                                 if (pindex >= targa_header.colormap_length)
489                                                         pindex = 0; // error
490                                                 p = palette + pindex * 4;
491                                                 red = p[0];
492                                                 green = p[1];
493                                                 blue = p[2];
494                                                 alpha = p[3];
495                                                 break;
496                                         case 2:
497                                         case 10:
498                                                 // BGR or BGRA
499                                                 blue = *fin++;
500                                                 if (fin < enddata)
501                                                         green = *fin++;
502                                                 if (fin < enddata)
503                                                         red = *fin++;
504                                                 if (targa_header.pixel_size == 32 && fin < enddata)
505                                                         alpha = *fin++;
506                                                 break;
507                                         case 3:
508                                         case 11:
509                                                 // greyscale
510                                                 red = green = blue = *fin++;
511                                                 break;
512                                         }
513                                         if (!alphabits)
514                                                 alpha = 255;
515                                 }
516                         }
517                         *pixbuf++ = red;
518                         *pixbuf++ = green;
519                         *pixbuf++ = blue;
520                         *pixbuf++ = alpha;
521                         x++;
522                         if (x == image_width)
523                         {
524                                 // end of line, advance to next
525                                 x = 0;
526                                 y++;
527                                 pixbuf += row_inc;
528                         }
529                 }
530         }
531
532         return image_rgba;
533 }
534
535 /*
536 ============
537 LoadLMP
538 ============
539 */
540 unsigned char *LoadLMP (const unsigned char *f, int filesize, int matchwidth, int matchheight, qboolean loadAs8Bit)
541 {
542         unsigned char *image_buffer;
543
544         if (filesize < 9)
545         {
546                 Con_Print("LoadLMP: invalid LMP file\n");
547                 return NULL;
548         }
549
550         // parse the very complicated header *chuckle*
551         image_width = BuffLittleLong(f);
552         image_height = BuffLittleLong(f + 4);
553         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
554         {
555                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
556                 return NULL;
557         }
558         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
559                 return NULL;
560
561         if (filesize < (8 + image_width * image_height))
562         {
563                 Con_Print("LoadLMP: invalid LMP file\n");
564                 return NULL;
565         }
566
567         if (loadAs8Bit)
568         {
569                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height);
570                 memcpy(image_buffer, f + 8, image_width * image_height);
571         }
572         else
573         {
574                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
575                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_transparent);
576         }
577         return image_buffer;
578 }
579
580 static unsigned char *LoadLMPRGBA (const unsigned char *f, int filesize, int matchwidth, int matchheight)
581 {
582         return LoadLMP(f, filesize, matchwidth, matchheight, false);
583 }
584
585
586 typedef struct q2wal_s
587 {
588         char            name[32];
589         unsigned        width, height;
590         unsigned        offsets[MIPLEVELS];             // four mip maps stored
591         char            animname[32];                   // next frame in animation chain
592         int                     flags;
593         int                     contents;
594         int                     value;
595 } q2wal_t;
596
597 unsigned char *LoadWAL (const unsigned char *f, int filesize, int matchwidth, int matchheight)
598 {
599         unsigned char *image_rgba;
600         const q2wal_t *inwal = (const q2wal_t *)f;
601
602         if (filesize < (int) sizeof(q2wal_t))
603         {
604                 Con_Print("LoadWAL: invalid WAL file\n");
605                 return NULL;
606         }
607
608         image_width = LittleLong(inwal->width);
609         image_height = LittleLong(inwal->height);
610         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
611         {
612                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
613                 return NULL;
614         }
615         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
616                 return NULL;
617
618         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
619         {
620                 Con_Print("LoadWAL: invalid WAL file\n");
621                 return NULL;
622         }
623
624         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
625         if (!image_rgba)
626         {
627                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
628                 return NULL;
629         }
630         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
631         return image_rgba;
632 }
633
634
635 void Image_StripImageExtension (const char *in, char *out)
636 {
637         const char *end, *temp;
638         end = in + strlen(in);
639         if ((end - in) >= 4)
640         {
641                 temp = end - 4;
642                 if (strcmp(temp, ".tga") == 0
643                  || strcmp(temp, ".pcx") == 0
644                  || strcmp(temp, ".lmp") == 0
645                  || strcmp(temp, ".png") == 0
646                  || strcmp(temp, ".jpg") == 0)
647                         end = temp;
648                 while (in < end)
649                         *out++ = *in++;
650                 *out++ = 0;
651         }
652         else
653                 strcpy(out, in);
654 }
655
656 typedef struct imageformat_s
657 {
658         const char *formatstring;
659         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int matchwidth, int matchheight);
660 }
661 imageformat_t;
662
663 // GAME_TENEBRAE only
664 imageformat_t imageformats_tenebrae[] =
665 {
666         {"override/%s.tga", LoadTGA},
667         {"override/%s.png", PNG_LoadImage},
668         {"override/%s.jpg", JPEG_LoadImage},
669         {NULL, NULL}
670 };
671
672 imageformat_t imageformats_nopath[] =
673 {
674         {"textures/%s.tga", LoadTGA},
675         {"textures/%s.png", PNG_LoadImage},
676         {"textures/%s.jpg", JPEG_LoadImage},
677         {"%s.tga", LoadTGA},
678         {"%s.png", PNG_LoadImage},
679         {"%s.jpg", JPEG_LoadImage},
680         {NULL, NULL}
681 };
682
683 imageformat_t imageformats_textures[] =
684 {
685         {"%s.tga", LoadTGA},
686         {"%s.png", PNG_LoadImage},
687         {"%s.jpg", JPEG_LoadImage},
688         {"%s.pcx", LoadPCX},
689         {"%s.wal", LoadWAL},
690         {NULL, NULL}
691 };
692
693 imageformat_t imageformats_gfx[] =
694 {
695         {"%s.tga", LoadTGA},
696         {"%s.png", PNG_LoadImage},
697         {"%s.jpg", JPEG_LoadImage},
698         {"%s.pcx", LoadPCX},
699         {"%s.lmp", LoadLMPRGBA},
700         {NULL, NULL}
701 };
702
703 imageformat_t imageformats_other[] =
704 {
705         {"%s.tga", LoadTGA},
706         {"%s.png", PNG_LoadImage},
707         {"%s.jpg", JPEG_LoadImage},
708         {"%s.pcx", LoadPCX},
709         {NULL, NULL}
710 };
711
712 unsigned char *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
713 {
714         fs_offset_t filesize;
715         imageformat_t *firstformat, *format;
716         unsigned char *f, *data = NULL;
717         char basename[MAX_QPATH], name[MAX_QPATH], *c;
718         if (developer_memorydebug.integer)
719                 Mem_CheckSentinelsGlobal();
720         if (developer_texturelogging.integer)
721                 Log_Printf("textures.log", "%s\n", filename);
722         strlcpy(basename, filename, sizeof(basename));
723         Image_StripImageExtension(basename, basename); // strip filename extensions to allow replacement by other types
724         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
725         for (c = basename;*c;c++)
726                 if (*c == '*')
727                         *c = '#';
728         name[0] = 0;
729         if (strchr(basename, '/'))
730         {
731                 int i;
732                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
733                         name[i] = basename[i];
734                 name[i] = 0;
735         }
736         if (gamemode == GAME_TENEBRAE)
737                 firstformat = imageformats_tenebrae;
738         else if (!strcasecmp(name, "textures"))
739                 firstformat = imageformats_textures;
740         else if (!strcasecmp(name, "gfx"))
741                 firstformat = imageformats_gfx;
742         else if (!strchr(name, '/'))
743                 firstformat = imageformats_nopath;
744         else
745                 firstformat = imageformats_other;
746         // now try all the formats in the selected list
747         for (format = firstformat;format->formatstring;format++)
748         {
749                 sprintf (name, format->formatstring, basename);
750                 f = FS_LoadFile(name, tempmempool, true, &filesize);
751                 if (f)
752                 {
753                         data = format->loadfunc(f, filesize, matchwidth, matchheight);
754                         Mem_Free(f);
755                         if (data)
756                         {
757                                 if (developer.integer >= 10)
758                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
759                                 if (developer_memorydebug.integer)
760                                         Mem_CheckSentinelsGlobal();
761                                 return data;
762                         }
763                 }
764         }
765         if (complain)
766         {
767                 Con_Printf("Couldn't load %s using ", filename);
768                 for (format = firstformat;format->formatstring;format++)
769                 {
770                         sprintf (name, format->formatstring, basename);
771                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
772                 }
773         }
774         if (developer_memorydebug.integer)
775                 Mem_CheckSentinelsGlobal();
776         return NULL;
777 }
778
779 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
780 {
781         unsigned char *data;
782         rtexture_t *rt;
783         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
784                 return 0;
785         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
786         Mem_Free(data);
787         return rt;
788 }
789
790 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
791 {
792         qboolean ret;
793         unsigned char *out;
794         const unsigned char *in, *end;
795
796         memset (buffer, 0, 18);
797         buffer[2] = 2;          // uncompressed type
798         buffer[12] = (width >> 0) & 0xFF;
799         buffer[13] = (width >> 8) & 0xFF;
800         buffer[14] = (height >> 0) & 0xFF;
801         buffer[15] = (height >> 8) & 0xFF;
802         buffer[16] = 24;        // pixel size
803
804         // swap rgb to bgr
805         in = data;
806         out = buffer + 18;
807         end = in + width*height*3;
808         for (;in < end;in += 3)
809         {
810                 *out++ = in[2];
811                 *out++ = in[1];
812                 *out++ = in[0];
813         }
814         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
815
816         return ret;
817 }
818
819 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
820 {
821         int y;
822         unsigned char *buffer, *out;
823         const unsigned char *in, *end;
824
825         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
826
827         memset (buffer, 0, 18);
828         buffer[2] = 2;          // uncompressed type
829         buffer[12] = (width >> 0) & 0xFF;
830         buffer[13] = (width >> 8) & 0xFF;
831         buffer[14] = (height >> 0) & 0xFF;
832         buffer[15] = (height >> 8) & 0xFF;
833         buffer[16] = 32;        // pixel size
834         buffer[17] = 8; // 8 bits of alpha
835
836         // swap rgba to bgra and flip upside down
837         out = buffer + 18;
838         for (y = height - 1;y >= 0;y--)
839         {
840                 in = data + y * width * 4;
841                 end = in + width * 4;
842                 for (;in < end;in += 4)
843                 {
844                         *out++ = in[2];
845                         *out++ = in[1];
846                         *out++ = in[0];
847                         *out++ = in[3];
848                 }
849         }
850         FS_WriteFile (filename, buffer, width*height*4 + 18 );
851
852         Mem_Free(buffer);
853 }
854
855 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
856 {
857         int             j, xi, oldx = 0, f, fstep, endx, lerp;
858         fstep = (int) (inwidth*65536.0f/outwidth);
859         endx = (inwidth-1);
860         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
861         {
862                 xi = f >> 16;
863                 if (xi != oldx)
864                 {
865                         in += (xi - oldx) * 4;
866                         oldx = xi;
867                 }
868                 if (xi < endx)
869                 {
870                         lerp = f & 0xFFFF;
871                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
872                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
873                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
874                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
875                 }
876                 else // last pixel of the line has no pixel to lerp to
877                 {
878                         *out++ = in[0];
879                         *out++ = in[1];
880                         *out++ = in[2];
881                         *out++ = in[3];
882                 }
883         }
884 }
885
886 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
887 {
888         int             j, xi, oldx = 0, f, fstep, endx, lerp;
889         fstep = (int) (inwidth*65536.0f/outwidth);
890         endx = (inwidth-1);
891         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
892         {
893                 xi = f >> 16;
894                 if (xi != oldx)
895                 {
896                         in += (xi - oldx) * 3;
897                         oldx = xi;
898                 }
899                 if (xi < endx)
900                 {
901                         lerp = f & 0xFFFF;
902                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
903                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
904                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
905                 }
906                 else // last pixel of the line has no pixel to lerp to
907                 {
908                         *out++ = in[0];
909                         *out++ = in[1];
910                         *out++ = in[2];
911                 }
912         }
913 }
914
915 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
916 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
917 {
918         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
919         unsigned char *out;
920         const unsigned char *inrow;
921         unsigned char *resamplerow1;
922         unsigned char *resamplerow2;
923         out = (unsigned char *)outdata;
924         fstep = (int) (inheight*65536.0f/outheight);
925
926         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
927         resamplerow2 = resamplerow1 + outwidth*4;
928
929         inrow = (const unsigned char *)indata;
930         oldy = 0;
931         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
932         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
933         for (i = 0, f = 0;i < outheight;i++,f += fstep)
934         {
935                 yi = f >> 16;
936                 if (yi < endy)
937                 {
938                         lerp = f & 0xFFFF;
939                         if (yi != oldy)
940                         {
941                                 inrow = (unsigned char *)indata + inwidth4*yi;
942                                 if (yi == oldy+1)
943                                         memcpy(resamplerow1, resamplerow2, outwidth4);
944                                 else
945                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
946                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
947                                 oldy = yi;
948                         }
949                         j = outwidth - 4;
950                         while(j >= 0)
951                         {
952                                 LERPBYTE( 0);
953                                 LERPBYTE( 1);
954                                 LERPBYTE( 2);
955                                 LERPBYTE( 3);
956                                 LERPBYTE( 4);
957                                 LERPBYTE( 5);
958                                 LERPBYTE( 6);
959                                 LERPBYTE( 7);
960                                 LERPBYTE( 8);
961                                 LERPBYTE( 9);
962                                 LERPBYTE(10);
963                                 LERPBYTE(11);
964                                 LERPBYTE(12);
965                                 LERPBYTE(13);
966                                 LERPBYTE(14);
967                                 LERPBYTE(15);
968                                 out += 16;
969                                 resamplerow1 += 16;
970                                 resamplerow2 += 16;
971                                 j -= 4;
972                         }
973                         if (j & 2)
974                         {
975                                 LERPBYTE( 0);
976                                 LERPBYTE( 1);
977                                 LERPBYTE( 2);
978                                 LERPBYTE( 3);
979                                 LERPBYTE( 4);
980                                 LERPBYTE( 5);
981                                 LERPBYTE( 6);
982                                 LERPBYTE( 7);
983                                 out += 8;
984                                 resamplerow1 += 8;
985                                 resamplerow2 += 8;
986                         }
987                         if (j & 1)
988                         {
989                                 LERPBYTE( 0);
990                                 LERPBYTE( 1);
991                                 LERPBYTE( 2);
992                                 LERPBYTE( 3);
993                                 out += 4;
994                                 resamplerow1 += 4;
995                                 resamplerow2 += 4;
996                         }
997                         resamplerow1 -= outwidth4;
998                         resamplerow2 -= outwidth4;
999                 }
1000                 else
1001                 {
1002                         if (yi != oldy)
1003                         {
1004                                 inrow = (unsigned char *)indata + inwidth4*yi;
1005                                 if (yi == oldy+1)
1006                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1007                                 else
1008                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1009                                 oldy = yi;
1010                         }
1011                         memcpy(out, resamplerow1, outwidth4);
1012                 }
1013         }
1014
1015         Mem_Free(resamplerow1);
1016         resamplerow1 = NULL;
1017         resamplerow2 = NULL;
1018 }
1019
1020 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1021 {
1022         int i, j;
1023         unsigned frac, fracstep;
1024         // relies on int being 4 bytes
1025         int *inrow, *out;
1026         out = (int *)outdata;
1027
1028         fracstep = inwidth*0x10000/outwidth;
1029         for (i = 0;i < outheight;i++)
1030         {
1031                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1032                 frac = fracstep >> 1;
1033                 j = outwidth - 4;
1034                 while (j >= 0)
1035                 {
1036                         out[0] = inrow[frac >> 16];frac += fracstep;
1037                         out[1] = inrow[frac >> 16];frac += fracstep;
1038                         out[2] = inrow[frac >> 16];frac += fracstep;
1039                         out[3] = inrow[frac >> 16];frac += fracstep;
1040                         out += 4;
1041                         j -= 4;
1042                 }
1043                 if (j & 2)
1044                 {
1045                         out[0] = inrow[frac >> 16];frac += fracstep;
1046                         out[1] = inrow[frac >> 16];frac += fracstep;
1047                         out += 2;
1048                 }
1049                 if (j & 1)
1050                 {
1051                         out[0] = inrow[frac >> 16];frac += fracstep;
1052                         out += 1;
1053                 }
1054         }
1055 }
1056
1057 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1058 {
1059         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1060         unsigned char *out;
1061         const unsigned char *inrow;
1062         unsigned char *resamplerow1;
1063         unsigned char *resamplerow2;
1064         out = (unsigned char *)outdata;
1065         fstep = (int) (inheight*65536.0f/outheight);
1066
1067         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1068         resamplerow2 = resamplerow1 + outwidth*3;
1069
1070         inrow = (const unsigned char *)indata;
1071         oldy = 0;
1072         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1073         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1074         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1075         {
1076                 yi = f >> 16;
1077                 if (yi < endy)
1078                 {
1079                         lerp = f & 0xFFFF;
1080                         if (yi != oldy)
1081                         {
1082                                 inrow = (unsigned char *)indata + inwidth3*yi;
1083                                 if (yi == oldy+1)
1084                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1085                                 else
1086                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1087                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1088                                 oldy = yi;
1089                         }
1090                         j = outwidth - 4;
1091                         while(j >= 0)
1092                         {
1093                                 LERPBYTE( 0);
1094                                 LERPBYTE( 1);
1095                                 LERPBYTE( 2);
1096                                 LERPBYTE( 3);
1097                                 LERPBYTE( 4);
1098                                 LERPBYTE( 5);
1099                                 LERPBYTE( 6);
1100                                 LERPBYTE( 7);
1101                                 LERPBYTE( 8);
1102                                 LERPBYTE( 9);
1103                                 LERPBYTE(10);
1104                                 LERPBYTE(11);
1105                                 out += 12;
1106                                 resamplerow1 += 12;
1107                                 resamplerow2 += 12;
1108                                 j -= 4;
1109                         }
1110                         if (j & 2)
1111                         {
1112                                 LERPBYTE( 0);
1113                                 LERPBYTE( 1);
1114                                 LERPBYTE( 2);
1115                                 LERPBYTE( 3);
1116                                 LERPBYTE( 4);
1117                                 LERPBYTE( 5);
1118                                 out += 6;
1119                                 resamplerow1 += 6;
1120                                 resamplerow2 += 6;
1121                         }
1122                         if (j & 1)
1123                         {
1124                                 LERPBYTE( 0);
1125                                 LERPBYTE( 1);
1126                                 LERPBYTE( 2);
1127                                 out += 3;
1128                                 resamplerow1 += 3;
1129                                 resamplerow2 += 3;
1130                         }
1131                         resamplerow1 -= outwidth3;
1132                         resamplerow2 -= outwidth3;
1133                 }
1134                 else
1135                 {
1136                         if (yi != oldy)
1137                         {
1138                                 inrow = (unsigned char *)indata + inwidth3*yi;
1139                                 if (yi == oldy+1)
1140                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1141                                 else
1142                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1143                                 oldy = yi;
1144                         }
1145                         memcpy(out, resamplerow1, outwidth3);
1146                 }
1147         }
1148         Mem_Free(resamplerow1);
1149         resamplerow1 = NULL;
1150         resamplerow2 = NULL;
1151 }
1152
1153 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1154 {
1155         int i, j, f, inwidth3 = inwidth * 3;
1156         unsigned frac, fracstep;
1157         unsigned char *inrow, *out;
1158         out = (unsigned char *)outdata;
1159
1160         fracstep = inwidth*0x10000/outwidth;
1161         for (i = 0;i < outheight;i++)
1162         {
1163                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1164                 frac = fracstep >> 1;
1165                 j = outwidth - 4;
1166                 while (j >= 0)
1167                 {
1168                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1169                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1170                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1171                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1172                         j -= 4;
1173                 }
1174                 if (j & 2)
1175                 {
1176                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1177                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1178                         out += 2;
1179                 }
1180                 if (j & 1)
1181                 {
1182                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1183                         out += 1;
1184                 }
1185         }
1186 }
1187
1188 /*
1189 ================
1190 Image_Resample
1191 ================
1192 */
1193 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1194 {
1195         if (indepth != 1 || outdepth != 1)
1196         {
1197                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1198                 return;
1199         }
1200         if (bytesperpixel == 4)
1201         {
1202                 if (quality)
1203                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1204                 else
1205                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1206         }
1207         else if (bytesperpixel == 3)
1208         {
1209                 if (quality)
1210                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1211                 else
1212                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1213         }
1214         else
1215                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1216 }
1217
1218 // in can be the same as out
1219 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1220 {
1221         int x, y, nextrow;
1222         if (*depth != 1 || destdepth != 1)
1223         {
1224                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1225                 return;
1226         }
1227         nextrow = *width * bytesperpixel;
1228         if (*width > destwidth)
1229         {
1230                 *width >>= 1;
1231                 if (*height > destheight)
1232                 {
1233                         // reduce both
1234                         *height >>= 1;
1235                         if (bytesperpixel == 4)
1236                         {
1237                                 for (y = 0;y < *height;y++)
1238                                 {
1239                                         for (x = 0;x < *width;x++)
1240                                         {
1241                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1242                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1243                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1244                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1245                                                 out += 4;
1246                                                 in += 8;
1247                                         }
1248                                         in += nextrow; // skip a line
1249                                 }
1250                         }
1251                         else if (bytesperpixel == 3)
1252                         {
1253                                 for (y = 0;y < *height;y++)
1254                                 {
1255                                         for (x = 0;x < *width;x++)
1256                                         {
1257                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1258                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1259                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1260                                                 out += 3;
1261                                                 in += 6;
1262                                         }
1263                                         in += nextrow; // skip a line
1264                                 }
1265                         }
1266                         else
1267                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1268                 }
1269                 else
1270                 {
1271                         // reduce width
1272                         if (bytesperpixel == 4)
1273                         {
1274                                 for (y = 0;y < *height;y++)
1275                                 {
1276                                         for (x = 0;x < *width;x++)
1277                                         {
1278                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1279                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1280                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1281                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1282                                                 out += 4;
1283                                                 in += 8;
1284                                         }
1285                                 }
1286                         }
1287                         else if (bytesperpixel == 3)
1288                         {
1289                                 for (y = 0;y < *height;y++)
1290                                 {
1291                                         for (x = 0;x < *width;x++)
1292                                         {
1293                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1294                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1295                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1296                                                 out += 3;
1297                                                 in += 6;
1298                                         }
1299                                 }
1300                         }
1301                         else
1302                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1303                 }
1304         }
1305         else
1306         {
1307                 if (*height > destheight)
1308                 {
1309                         // reduce height
1310                         *height >>= 1;
1311                         if (bytesperpixel == 4)
1312                         {
1313                                 for (y = 0;y < *height;y++)
1314                                 {
1315                                         for (x = 0;x < *width;x++)
1316                                         {
1317                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1318                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1319                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1320                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1321                                                 out += 4;
1322                                                 in += 4;
1323                                         }
1324                                         in += nextrow; // skip a line
1325                                 }
1326                         }
1327                         else if (bytesperpixel == 3)
1328                         {
1329                                 for (y = 0;y < *height;y++)
1330                                 {
1331                                         for (x = 0;x < *width;x++)
1332                                         {
1333                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1334                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1335                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1336                                                 out += 3;
1337                                                 in += 3;
1338                                         }
1339                                         in += nextrow; // skip a line
1340                                 }
1341                         }
1342                         else
1343                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1344                 }
1345                 else
1346                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1347         }
1348 }
1349
1350 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1351 {
1352         int x, y;
1353         const unsigned char *p0, *p1, *p2;
1354         unsigned char *out;
1355         float iwidth, iheight, ibumpscale, n[3];
1356         iwidth = 1.0f / width;
1357         iheight = 1.0f / height;
1358         ibumpscale = (255.0f * 3.0f) / bumpscale;
1359         out = outpixels;
1360         for (y = 0;y < height;y++)
1361         {
1362                 for (x = 0;x < width;x++)
1363                 {
1364                         p0 = inpixels + (y * width + x) * 4;
1365                         if (x == width - 1)
1366                         {
1367                                 if (clamp)
1368                                         p1 = inpixels + (y * width + x) * 4;
1369                                 else
1370                                         p1 = inpixels + (y * width) * 4;
1371                         }
1372                         else
1373                                 p1 = inpixels + (y * width + x + 1) * 4;
1374                         if (y == height - 1)
1375                         {
1376                                 if (clamp)
1377                                         p2 = inpixels + (y * width + x) * 4;
1378                                 else
1379                                         p2 = inpixels + x * 4;
1380                         }
1381                         else
1382                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1383                         /*
1384                         dv[0][0] = iwidth;
1385                         dv[0][1] = 0;
1386                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1387                         dv[1][0] = 0;
1388                         dv[1][1] = iheight;
1389                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1390                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1391                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1392                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1393                         */
1394                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1395                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1396                         n[2] = ibumpscale;
1397                         VectorNormalize(n);
1398                         /*
1399                         // this should work for the bottom right triangle if anyone wants
1400                         // code for that for some reason
1401                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1402                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1403                         n[2] = ibumpscale;
1404                         VectorNormalize(n);
1405                         */
1406                         out[0] = 128.0f + n[0] * 127.0f;
1407                         out[1] = 128.0f + n[1] * 127.0f;
1408                         out[2] = 128.0f + n[2] * 127.0f;
1409                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1410                         out += 4;
1411                 }
1412         }
1413 }
1414
1415 int image_loadskin(imageskin_t *s, const char *shadername)
1416 {
1417         int j;
1418         unsigned char *bumppixels;
1419         int bumppixels_width, bumppixels_height;
1420         char name[MAX_QPATH];
1421         strlcpy(name, shadername, sizeof(name));
1422         Image_StripImageExtension(name, name);
1423         memset(s, 0, sizeof(*s));
1424         s->basepixels = loadimagepixels(name, false, 0, 0);
1425         if (s->basepixels == NULL)
1426                 return false;
1427         s->basepixels_width = image_width;
1428         s->basepixels_height = image_height;
1429
1430         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1431         for (j = 3;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1432                 if (s->basepixels[j] < 255)
1433                         break;
1434         if (j < s->basepixels_width * s->basepixels_height * 4)
1435         {
1436                 // has transparent pixels
1437                 s->maskpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1438                 s->maskpixels_width = s->basepixels_width;
1439                 s->maskpixels_height = s->basepixels_height;
1440                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1441                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1442                 {
1443                         s->maskpixels[j+0] = 255;
1444                         s->maskpixels[j+1] = 255;
1445                         s->maskpixels[j+2] = 255;
1446                 }
1447         }
1448
1449         // _luma is supported for tenebrae compatibility
1450         // (I think it's a very stupid name, but oh well)
1451         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1452          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1453         {
1454                 s->glowpixels_width = image_width;
1455                 s->glowpixels_height = image_height;
1456         }
1457         // _norm is the name used by tenebrae
1458         // (I don't like the name much)
1459         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1460         {
1461                 s->nmappixels_width = image_width;
1462                 s->nmappixels_height = image_height;
1463         }
1464         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1465         {
1466                 bumppixels_width = image_width;
1467                 bumppixels_height = image_height;
1468         }
1469         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1470         {
1471                 s->glosspixels_width = image_width;
1472                 s->glosspixels_height = image_height;
1473         }
1474         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1475         {
1476                 s->pantspixels_width = image_width;
1477                 s->pantspixels_height = image_height;
1478         }
1479         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1480         {
1481                 s->shirtpixels_width = image_width;
1482                 s->shirtpixels_height = image_height;
1483         }
1484
1485         if (s->nmappixels == NULL)
1486         {
1487                 if (bumppixels != NULL)
1488                 {
1489                         if (r_shadow_bumpscale_bumpmap.value > 0)
1490                         {
1491                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1492                                 s->nmappixels_width = bumppixels_width;
1493                                 s->nmappixels_height = bumppixels_height;
1494                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1495                         }
1496                 }
1497                 else
1498                 {
1499                         if (r_shadow_bumpscale_basetexture.value > 0)
1500                         {
1501                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1502                                 s->nmappixels_width = s->basepixels_width;
1503                                 s->nmappixels_height = s->basepixels_height;
1504                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1505                         }
1506                 }
1507         }
1508         if (bumppixels != NULL)
1509                 Mem_Free(bumppixels);
1510         return true;
1511 }
1512
1513 void image_freeskin(imageskin_t *s)
1514 {
1515         if (s->basepixels)
1516                 Mem_Free(s->basepixels);
1517         if (s->maskpixels)
1518                 Mem_Free(s->maskpixels);
1519         if (s->nmappixels)
1520                 Mem_Free(s->nmappixels);
1521         if (s->glowpixels)
1522                 Mem_Free(s->glowpixels);
1523         if (s->glosspixels)
1524                 Mem_Free(s->glosspixels);
1525         if (s->pantspixels)
1526                 Mem_Free(s->pantspixels);
1527         if (s->shirtpixels)
1528                 Mem_Free(s->shirtpixels);
1529         memset(s, 0, sizeof(*s));
1530 }
1531