21e809ed8360ddd11a0c24f05261e578ef09c106
[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                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
758                                 if (developer_memorydebug.integer)
759                                         Mem_CheckSentinelsGlobal();
760                                 return data;
761                         }
762                 }
763         }
764         if (complain)
765         {
766                 Con_Printf("Couldn't load %s using ", filename);
767                 for (format = firstformat;format->formatstring;format++)
768                 {
769                         sprintf (name, format->formatstring, basename);
770                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
771                 }
772         }
773         if (developer_memorydebug.integer)
774                 Mem_CheckSentinelsGlobal();
775         return NULL;
776 }
777
778 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
779 {
780         unsigned char *data;
781         rtexture_t *rt;
782         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
783                 return 0;
784         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
785         Mem_Free(data);
786         return rt;
787 }
788
789 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
790 {
791         qboolean ret;
792         unsigned char *out;
793         const unsigned char *in, *end;
794
795         memset (buffer, 0, 18);
796         buffer[2] = 2;          // uncompressed type
797         buffer[12] = (width >> 0) & 0xFF;
798         buffer[13] = (width >> 8) & 0xFF;
799         buffer[14] = (height >> 0) & 0xFF;
800         buffer[15] = (height >> 8) & 0xFF;
801         buffer[16] = 24;        // pixel size
802
803         // swap rgb to bgr
804         in = data;
805         out = buffer + 18;
806         end = in + width*height*3;
807         for (;in < end;in += 3)
808         {
809                 *out++ = in[2];
810                 *out++ = in[1];
811                 *out++ = in[0];
812         }
813         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
814
815         return ret;
816 }
817
818 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
819 {
820         int y;
821         unsigned char *buffer, *out;
822         const unsigned char *in, *end;
823
824         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
825
826         memset (buffer, 0, 18);
827         buffer[2] = 2;          // uncompressed type
828         buffer[12] = (width >> 0) & 0xFF;
829         buffer[13] = (width >> 8) & 0xFF;
830         buffer[14] = (height >> 0) & 0xFF;
831         buffer[15] = (height >> 8) & 0xFF;
832         buffer[16] = 32;        // pixel size
833         buffer[17] = 8; // 8 bits of alpha
834
835         // swap rgba to bgra and flip upside down
836         out = buffer + 18;
837         for (y = height - 1;y >= 0;y--)
838         {
839                 in = data + y * width * 4;
840                 end = in + width * 4;
841                 for (;in < end;in += 4)
842                 {
843                         *out++ = in[2];
844                         *out++ = in[1];
845                         *out++ = in[0];
846                         *out++ = in[3];
847                 }
848         }
849         FS_WriteFile (filename, buffer, width*height*4 + 18 );
850
851         Mem_Free(buffer);
852 }
853
854 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
855 {
856         int             j, xi, oldx = 0, f, fstep, endx, lerp;
857         fstep = (int) (inwidth*65536.0f/outwidth);
858         endx = (inwidth-1);
859         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
860         {
861                 xi = f >> 16;
862                 if (xi != oldx)
863                 {
864                         in += (xi - oldx) * 4;
865                         oldx = xi;
866                 }
867                 if (xi < endx)
868                 {
869                         lerp = f & 0xFFFF;
870                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
871                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
872                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
873                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
874                 }
875                 else // last pixel of the line has no pixel to lerp to
876                 {
877                         *out++ = in[0];
878                         *out++ = in[1];
879                         *out++ = in[2];
880                         *out++ = in[3];
881                 }
882         }
883 }
884
885 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
886 {
887         int             j, xi, oldx = 0, f, fstep, endx, lerp;
888         fstep = (int) (inwidth*65536.0f/outwidth);
889         endx = (inwidth-1);
890         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
891         {
892                 xi = f >> 16;
893                 if (xi != oldx)
894                 {
895                         in += (xi - oldx) * 3;
896                         oldx = xi;
897                 }
898                 if (xi < endx)
899                 {
900                         lerp = f & 0xFFFF;
901                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
902                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
903                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
904                 }
905                 else // last pixel of the line has no pixel to lerp to
906                 {
907                         *out++ = in[0];
908                         *out++ = in[1];
909                         *out++ = in[2];
910                 }
911         }
912 }
913
914 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
915 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
916 {
917         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
918         unsigned char *out;
919         const unsigned char *inrow;
920         unsigned char *resamplerow1;
921         unsigned char *resamplerow2;
922         out = (unsigned char *)outdata;
923         fstep = (int) (inheight*65536.0f/outheight);
924
925         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
926         resamplerow2 = resamplerow1 + outwidth*4;
927
928         inrow = (const unsigned char *)indata;
929         oldy = 0;
930         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
931         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
932         for (i = 0, f = 0;i < outheight;i++,f += fstep)
933         {
934                 yi = f >> 16;
935                 if (yi < endy)
936                 {
937                         lerp = f & 0xFFFF;
938                         if (yi != oldy)
939                         {
940                                 inrow = (unsigned char *)indata + inwidth4*yi;
941                                 if (yi == oldy+1)
942                                         memcpy(resamplerow1, resamplerow2, outwidth4);
943                                 else
944                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
945                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
946                                 oldy = yi;
947                         }
948                         j = outwidth - 4;
949                         while(j >= 0)
950                         {
951                                 LERPBYTE( 0);
952                                 LERPBYTE( 1);
953                                 LERPBYTE( 2);
954                                 LERPBYTE( 3);
955                                 LERPBYTE( 4);
956                                 LERPBYTE( 5);
957                                 LERPBYTE( 6);
958                                 LERPBYTE( 7);
959                                 LERPBYTE( 8);
960                                 LERPBYTE( 9);
961                                 LERPBYTE(10);
962                                 LERPBYTE(11);
963                                 LERPBYTE(12);
964                                 LERPBYTE(13);
965                                 LERPBYTE(14);
966                                 LERPBYTE(15);
967                                 out += 16;
968                                 resamplerow1 += 16;
969                                 resamplerow2 += 16;
970                                 j -= 4;
971                         }
972                         if (j & 2)
973                         {
974                                 LERPBYTE( 0);
975                                 LERPBYTE( 1);
976                                 LERPBYTE( 2);
977                                 LERPBYTE( 3);
978                                 LERPBYTE( 4);
979                                 LERPBYTE( 5);
980                                 LERPBYTE( 6);
981                                 LERPBYTE( 7);
982                                 out += 8;
983                                 resamplerow1 += 8;
984                                 resamplerow2 += 8;
985                         }
986                         if (j & 1)
987                         {
988                                 LERPBYTE( 0);
989                                 LERPBYTE( 1);
990                                 LERPBYTE( 2);
991                                 LERPBYTE( 3);
992                                 out += 4;
993                                 resamplerow1 += 4;
994                                 resamplerow2 += 4;
995                         }
996                         resamplerow1 -= outwidth4;
997                         resamplerow2 -= outwidth4;
998                 }
999                 else
1000                 {
1001                         if (yi != oldy)
1002                         {
1003                                 inrow = (unsigned char *)indata + inwidth4*yi;
1004                                 if (yi == oldy+1)
1005                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1006                                 else
1007                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1008                                 oldy = yi;
1009                         }
1010                         memcpy(out, resamplerow1, outwidth4);
1011                 }
1012         }
1013
1014         Mem_Free(resamplerow1);
1015         resamplerow1 = NULL;
1016         resamplerow2 = NULL;
1017 }
1018
1019 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1020 {
1021         int i, j;
1022         unsigned frac, fracstep;
1023         // relies on int being 4 bytes
1024         int *inrow, *out;
1025         out = (int *)outdata;
1026
1027         fracstep = inwidth*0x10000/outwidth;
1028         for (i = 0;i < outheight;i++)
1029         {
1030                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1031                 frac = fracstep >> 1;
1032                 j = outwidth - 4;
1033                 while (j >= 0)
1034                 {
1035                         out[0] = inrow[frac >> 16];frac += fracstep;
1036                         out[1] = inrow[frac >> 16];frac += fracstep;
1037                         out[2] = inrow[frac >> 16];frac += fracstep;
1038                         out[3] = inrow[frac >> 16];frac += fracstep;
1039                         out += 4;
1040                         j -= 4;
1041                 }
1042                 if (j & 2)
1043                 {
1044                         out[0] = inrow[frac >> 16];frac += fracstep;
1045                         out[1] = inrow[frac >> 16];frac += fracstep;
1046                         out += 2;
1047                 }
1048                 if (j & 1)
1049                 {
1050                         out[0] = inrow[frac >> 16];frac += fracstep;
1051                         out += 1;
1052                 }
1053         }
1054 }
1055
1056 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1057 {
1058         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1059         unsigned char *out;
1060         const unsigned char *inrow;
1061         unsigned char *resamplerow1;
1062         unsigned char *resamplerow2;
1063         out = (unsigned char *)outdata;
1064         fstep = (int) (inheight*65536.0f/outheight);
1065
1066         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1067         resamplerow2 = resamplerow1 + outwidth*3;
1068
1069         inrow = (const unsigned char *)indata;
1070         oldy = 0;
1071         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1072         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1073         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1074         {
1075                 yi = f >> 16;
1076                 if (yi < endy)
1077                 {
1078                         lerp = f & 0xFFFF;
1079                         if (yi != oldy)
1080                         {
1081                                 inrow = (unsigned char *)indata + inwidth3*yi;
1082                                 if (yi == oldy+1)
1083                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1084                                 else
1085                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1086                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1087                                 oldy = yi;
1088                         }
1089                         j = outwidth - 4;
1090                         while(j >= 0)
1091                         {
1092                                 LERPBYTE( 0);
1093                                 LERPBYTE( 1);
1094                                 LERPBYTE( 2);
1095                                 LERPBYTE( 3);
1096                                 LERPBYTE( 4);
1097                                 LERPBYTE( 5);
1098                                 LERPBYTE( 6);
1099                                 LERPBYTE( 7);
1100                                 LERPBYTE( 8);
1101                                 LERPBYTE( 9);
1102                                 LERPBYTE(10);
1103                                 LERPBYTE(11);
1104                                 out += 12;
1105                                 resamplerow1 += 12;
1106                                 resamplerow2 += 12;
1107                                 j -= 4;
1108                         }
1109                         if (j & 2)
1110                         {
1111                                 LERPBYTE( 0);
1112                                 LERPBYTE( 1);
1113                                 LERPBYTE( 2);
1114                                 LERPBYTE( 3);
1115                                 LERPBYTE( 4);
1116                                 LERPBYTE( 5);
1117                                 out += 6;
1118                                 resamplerow1 += 6;
1119                                 resamplerow2 += 6;
1120                         }
1121                         if (j & 1)
1122                         {
1123                                 LERPBYTE( 0);
1124                                 LERPBYTE( 1);
1125                                 LERPBYTE( 2);
1126                                 out += 3;
1127                                 resamplerow1 += 3;
1128                                 resamplerow2 += 3;
1129                         }
1130                         resamplerow1 -= outwidth3;
1131                         resamplerow2 -= outwidth3;
1132                 }
1133                 else
1134                 {
1135                         if (yi != oldy)
1136                         {
1137                                 inrow = (unsigned char *)indata + inwidth3*yi;
1138                                 if (yi == oldy+1)
1139                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1140                                 else
1141                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1142                                 oldy = yi;
1143                         }
1144                         memcpy(out, resamplerow1, outwidth3);
1145                 }
1146         }
1147         Mem_Free(resamplerow1);
1148         resamplerow1 = NULL;
1149         resamplerow2 = NULL;
1150 }
1151
1152 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1153 {
1154         int i, j, f, inwidth3 = inwidth * 3;
1155         unsigned frac, fracstep;
1156         unsigned char *inrow, *out;
1157         out = (unsigned char *)outdata;
1158
1159         fracstep = inwidth*0x10000/outwidth;
1160         for (i = 0;i < outheight;i++)
1161         {
1162                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1163                 frac = fracstep >> 1;
1164                 j = outwidth - 4;
1165                 while (j >= 0)
1166                 {
1167                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
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                         j -= 4;
1172                 }
1173                 if (j & 2)
1174                 {
1175                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1176                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1177                         out += 2;
1178                 }
1179                 if (j & 1)
1180                 {
1181                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1182                         out += 1;
1183                 }
1184         }
1185 }
1186
1187 /*
1188 ================
1189 Image_Resample
1190 ================
1191 */
1192 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1193 {
1194         if (indepth != 1 || outdepth != 1)
1195         {
1196                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1197                 return;
1198         }
1199         if (bytesperpixel == 4)
1200         {
1201                 if (quality)
1202                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1203                 else
1204                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1205         }
1206         else if (bytesperpixel == 3)
1207         {
1208                 if (quality)
1209                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1210                 else
1211                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1212         }
1213         else
1214                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1215 }
1216
1217 // in can be the same as out
1218 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1219 {
1220         int x, y, nextrow;
1221         if (*depth != 1 || destdepth != 1)
1222         {
1223                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1224                 return;
1225         }
1226         nextrow = *width * bytesperpixel;
1227         if (*width > destwidth)
1228         {
1229                 *width >>= 1;
1230                 if (*height > destheight)
1231                 {
1232                         // reduce both
1233                         *height >>= 1;
1234                         if (bytesperpixel == 4)
1235                         {
1236                                 for (y = 0;y < *height;y++)
1237                                 {
1238                                         for (x = 0;x < *width;x++)
1239                                         {
1240                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1241                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1242                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1243                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1244                                                 out += 4;
1245                                                 in += 8;
1246                                         }
1247                                         in += nextrow; // skip a line
1248                                 }
1249                         }
1250                         else if (bytesperpixel == 3)
1251                         {
1252                                 for (y = 0;y < *height;y++)
1253                                 {
1254                                         for (x = 0;x < *width;x++)
1255                                         {
1256                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1257                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1258                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1259                                                 out += 3;
1260                                                 in += 6;
1261                                         }
1262                                         in += nextrow; // skip a line
1263                                 }
1264                         }
1265                         else
1266                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1267                 }
1268                 else
1269                 {
1270                         // reduce width
1271                         if (bytesperpixel == 4)
1272                         {
1273                                 for (y = 0;y < *height;y++)
1274                                 {
1275                                         for (x = 0;x < *width;x++)
1276                                         {
1277                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1278                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1279                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1280                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1281                                                 out += 4;
1282                                                 in += 8;
1283                                         }
1284                                 }
1285                         }
1286                         else if (bytesperpixel == 3)
1287                         {
1288                                 for (y = 0;y < *height;y++)
1289                                 {
1290                                         for (x = 0;x < *width;x++)
1291                                         {
1292                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1293                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1294                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1295                                                 out += 3;
1296                                                 in += 6;
1297                                         }
1298                                 }
1299                         }
1300                         else
1301                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1302                 }
1303         }
1304         else
1305         {
1306                 if (*height > destheight)
1307                 {
1308                         // reduce height
1309                         *height >>= 1;
1310                         if (bytesperpixel == 4)
1311                         {
1312                                 for (y = 0;y < *height;y++)
1313                                 {
1314                                         for (x = 0;x < *width;x++)
1315                                         {
1316                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1317                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1318                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1319                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1320                                                 out += 4;
1321                                                 in += 4;
1322                                         }
1323                                         in += nextrow; // skip a line
1324                                 }
1325                         }
1326                         else if (bytesperpixel == 3)
1327                         {
1328                                 for (y = 0;y < *height;y++)
1329                                 {
1330                                         for (x = 0;x < *width;x++)
1331                                         {
1332                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1333                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1334                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1335                                                 out += 3;
1336                                                 in += 3;
1337                                         }
1338                                         in += nextrow; // skip a line
1339                                 }
1340                         }
1341                         else
1342                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1343                 }
1344                 else
1345                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1346         }
1347 }
1348
1349 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1350 {
1351         int x, y;
1352         const unsigned char *p0, *p1, *p2;
1353         unsigned char *out;
1354         float iwidth, iheight, ibumpscale, n[3];
1355         iwidth = 1.0f / width;
1356         iheight = 1.0f / height;
1357         ibumpscale = (255.0f * 3.0f) / bumpscale;
1358         out = outpixels;
1359         for (y = 0;y < height;y++)
1360         {
1361                 for (x = 0;x < width;x++)
1362                 {
1363                         p0 = inpixels + (y * width + x) * 4;
1364                         if (x == width - 1)
1365                         {
1366                                 if (clamp)
1367                                         p1 = inpixels + (y * width + x) * 4;
1368                                 else
1369                                         p1 = inpixels + (y * width) * 4;
1370                         }
1371                         else
1372                                 p1 = inpixels + (y * width + x + 1) * 4;
1373                         if (y == height - 1)
1374                         {
1375                                 if (clamp)
1376                                         p2 = inpixels + (y * width + x) * 4;
1377                                 else
1378                                         p2 = inpixels + x * 4;
1379                         }
1380                         else
1381                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1382                         /*
1383                         dv[0][0] = iwidth;
1384                         dv[0][1] = 0;
1385                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1386                         dv[1][0] = 0;
1387                         dv[1][1] = iheight;
1388                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1389                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1390                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1391                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1392                         */
1393                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1394                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1395                         n[2] = ibumpscale;
1396                         VectorNormalize(n);
1397                         /*
1398                         // this should work for the bottom right triangle if anyone wants
1399                         // code for that for some reason
1400                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1401                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1402                         n[2] = ibumpscale;
1403                         VectorNormalize(n);
1404                         */
1405                         out[0] = 128.0f + n[0] * 127.0f;
1406                         out[1] = 128.0f + n[1] * 127.0f;
1407                         out[2] = 128.0f + n[2] * 127.0f;
1408                         out[3] = (p0[0] + p0[1] + p0[2]) / 3;
1409                         out += 4;
1410                 }
1411         }
1412 }
1413
1414 int image_loadskin(imageskin_t *s, const char *shadername)
1415 {
1416         int j;
1417         unsigned char *bumppixels;
1418         int bumppixels_width, bumppixels_height;
1419         char name[MAX_QPATH];
1420         strlcpy(name, shadername, sizeof(name));
1421         Image_StripImageExtension(name, name);
1422         memset(s, 0, sizeof(*s));
1423         s->basepixels = loadimagepixels(name, false, 0, 0);
1424         if (s->basepixels == NULL)
1425                 return false;
1426         s->basepixels_width = image_width;
1427         s->basepixels_height = image_height;
1428
1429         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1430         for (j = 3;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1431                 if (s->basepixels[j] < 255)
1432                         break;
1433         if (j < s->basepixels_width * s->basepixels_height * 4)
1434         {
1435                 // has transparent pixels
1436                 s->maskpixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1437                 s->maskpixels_width = s->basepixels_width;
1438                 s->maskpixels_height = s->basepixels_height;
1439                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1440                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1441                 {
1442                         s->maskpixels[j+0] = 255;
1443                         s->maskpixels[j+1] = 255;
1444                         s->maskpixels[j+2] = 255;
1445                 }
1446         }
1447
1448         // _luma is supported for tenebrae compatibility
1449         // (I think it's a very stupid name, but oh well)
1450         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1451          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1452         {
1453                 s->glowpixels_width = image_width;
1454                 s->glowpixels_height = image_height;
1455         }
1456         // _norm is the name used by tenebrae
1457         // (I don't like the name much)
1458         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1459         {
1460                 s->nmappixels_width = image_width;
1461                 s->nmappixels_height = image_height;
1462         }
1463         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1464         {
1465                 bumppixels_width = image_width;
1466                 bumppixels_height = image_height;
1467         }
1468         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1469         {
1470                 s->glosspixels_width = image_width;
1471                 s->glosspixels_height = image_height;
1472         }
1473         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1474         {
1475                 s->pantspixels_width = image_width;
1476                 s->pantspixels_height = image_height;
1477         }
1478         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1479         {
1480                 s->shirtpixels_width = image_width;
1481                 s->shirtpixels_height = image_height;
1482         }
1483
1484         if (s->nmappixels == NULL)
1485         {
1486                 if (bumppixels != NULL)
1487                 {
1488                         if (r_shadow_bumpscale_bumpmap.value > 0)
1489                         {
1490                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1491                                 s->nmappixels_width = bumppixels_width;
1492                                 s->nmappixels_height = bumppixels_height;
1493                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1494                         }
1495                 }
1496                 else
1497                 {
1498                         if (r_shadow_bumpscale_basetexture.value > 0)
1499                         {
1500                                 s->nmappixels = (unsigned char *)Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1501                                 s->nmappixels_width = s->basepixels_width;
1502                                 s->nmappixels_height = s->basepixels_height;
1503                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1504                         }
1505                 }
1506         }
1507         if (bumppixels != NULL)
1508                 Mem_Free(bumppixels);
1509         return true;
1510 }
1511
1512 void image_freeskin(imageskin_t *s)
1513 {
1514         if (s->basepixels)
1515                 Mem_Free(s->basepixels);
1516         if (s->maskpixels)
1517                 Mem_Free(s->maskpixels);
1518         if (s->nmappixels)
1519                 Mem_Free(s->nmappixels);
1520         if (s->glowpixels)
1521                 Mem_Free(s->glowpixels);
1522         if (s->glosspixels)
1523                 Mem_Free(s->glosspixels);
1524         if (s->pantspixels)
1525                 Mem_Free(s->pantspixels);
1526         if (s->shirtpixels)
1527                 Mem_Free(s->shirtpixels);
1528         memset(s, 0, sizeof(*s));
1529 }
1530