Mem_AllocPool flags and parent parameters added, now there can be multiple temporary...
[divverent/darkplaces.git] / image.c
1
2 #include "quakedef.h"
3 #include "image.h"
4 #include "jpeg.h"
5 #include "r_shadow.h"
6
7 int             image_width;
8 int             image_height;
9
10 #if 1
11 // written by LordHavoc in a readable way, optimized by Vic, further optimized by LordHavoc (the non-special index case), readable version preserved below this
12 void Image_CopyMux(qbyte *outpixels, const qbyte *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
13 {
14         int index, c, x, y;
15         const qbyte *in, *line;
16         int row_inc = (inputflipy ? -inputwidth : inputwidth) * numinputcomponents, col_inc = (inputflipx ? -1 : 1) * numinputcomponents;
17         int row_ofs = (inputflipy ? (inputheight - 1) * inputwidth * numinputcomponents : 0), col_ofs = (inputflipx ? (inputwidth - 1) * numinputcomponents : 0);
18
19         for (c = 0; c < numoutputcomponents; c++)
20                 if (outputinputcomponentindices[c] & 0x80000000)
21                         break;
22         if (c < numoutputcomponents)
23         {
24                 // special indices used
25                 if (inputflipdiagonal)
26                 {
27                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
28                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
29                                         for (c = 0; c < numoutputcomponents; c++)
30                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
31                 }
32                 else
33                 {
34                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
35                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
36                                         for (c = 0; c < numoutputcomponents; c++)
37                                                 outpixels[c] = ((index = outputinputcomponentindices[c]) & 0x80000000) ? index : in[index];
38                 }
39         }
40         else
41         {
42                 // special indices not used
43                 if (inputflipdiagonal)
44                 {
45                         for (x = 0, line = inpixels + col_ofs; x < inputwidth; x++, line += col_inc)
46                                 for (y = 0, in = line + row_ofs; y < inputheight; y++, in += row_inc, outpixels += numinputcomponents)
47                                         for (c = 0; c < numoutputcomponents; c++)
48                                                 outpixels[c] = in[outputinputcomponentindices[c]];
49                 }
50                 else
51                 {
52                         for (y = 0, line = inpixels + row_ofs; y < inputheight; y++, line += row_inc)
53                                 for (x = 0, in = line + col_ofs; x < inputwidth; x++, in += col_inc, outpixels += numinputcomponents)
54                                         for (c = 0; c < numoutputcomponents; c++)
55                                                 outpixels[c] = in[outputinputcomponentindices[c]];
56                 }
57         }
58 }
59 #else
60 // intentionally readable version
61 void Image_CopyMux(qbyte *outpixels, const qbyte *inpixels, int inputwidth, int inputheight, qboolean inputflipx, qboolean inputflipy, qboolean inputflipdiagonal, int numoutputcomponents, int numinputcomponents, int *outputinputcomponentindices)
62 {
63         int index, c, x, y;
64         const qbyte *in, *inrow, *incolumn;
65         if (inputflipdiagonal)
66         {
67                 for (x = 0;x < inputwidth;x++)
68                 {
69                         for (y = 0;y < inputheight;y++)
70                         {
71                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
72                                 for (c = 0;c < numoutputcomponents;c++)
73                                 {
74                                         index = outputinputcomponentindices[c];
75                                         if (index & 0x80000000)
76                                                 *outpixels++ = index;
77                                         else
78                                                 *outpixels++ = in[index];
79                                 }
80                         }
81                 }
82         }
83         else
84         {
85                 for (y = 0;y < inputheight;y++)
86                 {
87                         for (x = 0;x < inputwidth;x++)
88                         {
89                                 in = inpixels + ((inputflipy ? inputheight - 1 - y : y) * inputwidth + (inputflipx ? inputwidth - 1 - x : x)) * numinputcomponents;
90                                 for (c = 0;c < numoutputcomponents;c++)
91                                 {
92                                         index = outputinputcomponentindices[c];
93                                         if (index & 0x80000000)
94                                                 *outpixels++ = index;
95                                         else
96                                                 *outpixels++ = in[index];
97                                 }
98                         }
99                 }
100         }
101 }
102 #endif
103
104 void Image_GammaRemapRGB(const qbyte *in, qbyte *out, int pixels, const qbyte *gammar, const qbyte *gammag, const qbyte *gammab)
105 {
106         while (pixels--)
107         {
108                 out[0] = gammar[in[0]];
109                 out[1] = gammag[in[1]];
110                 out[2] = gammab[in[2]];
111                 in += 3;
112                 out += 3;
113         }
114 }
115
116 // note: pal must be 32bit color
117 void Image_Copy8bitRGBA(const qbyte *in, qbyte *out, int pixels, const unsigned int *pal)
118 {
119         int *iout = (void *)out;
120         while (pixels >= 8)
121         {
122                 iout[0] = pal[in[0]];
123                 iout[1] = pal[in[1]];
124                 iout[2] = pal[in[2]];
125                 iout[3] = pal[in[3]];
126                 iout[4] = pal[in[4]];
127                 iout[5] = pal[in[5]];
128                 iout[6] = pal[in[6]];
129                 iout[7] = pal[in[7]];
130                 in += 8;
131                 iout += 8;
132                 pixels -= 8;
133         }
134         if (pixels & 4)
135         {
136                 iout[0] = pal[in[0]];
137                 iout[1] = pal[in[1]];
138                 iout[2] = pal[in[2]];
139                 iout[3] = pal[in[3]];
140                 in += 4;
141                 iout += 4;
142         }
143         if (pixels & 2)
144         {
145                 iout[0] = pal[in[0]];
146                 iout[1] = pal[in[1]];
147                 in += 2;
148                 iout += 2;
149         }
150         if (pixels & 1)
151                 iout[0] = pal[in[0]];
152 }
153
154 /*
155 =================================================================
156
157   PCX Loading
158
159 =================================================================
160 */
161
162 typedef struct
163 {
164     char        manufacturer;
165     char        version;
166     char        encoding;
167     char        bits_per_pixel;
168     unsigned short      xmin,ymin,xmax,ymax;
169     unsigned short      hres,vres;
170     unsigned char       palette[48];
171     char        reserved;
172     char        color_planes;
173     unsigned short      bytes_per_line;
174     unsigned short      palette_type;
175     char        filler[58];
176 } pcx_t;
177
178 /*
179 ============
180 LoadPCX
181 ============
182 */
183 qbyte* LoadPCX (qbyte *f, int matchwidth, int matchheight)
184 {
185         pcx_t pcx;
186         qbyte *a, *b, *image_rgba, *pbuf;
187         const qbyte *palette, *fin, *enddata;
188         int x, y, x2, dataByte;
189
190         if (fs_filesize < (int)sizeof(pcx) + 768)
191         {
192                 Con_Print("Bad pcx file\n");
193                 return NULL;
194         }
195
196         fin = f;
197
198         memcpy(&pcx, fin, sizeof(pcx));
199         fin += sizeof(pcx);
200
201         // LordHavoc: big-endian support ported from QF newtree
202         pcx.xmax = LittleShort (pcx.xmax);
203         pcx.xmin = LittleShort (pcx.xmin);
204         pcx.ymax = LittleShort (pcx.ymax);
205         pcx.ymin = LittleShort (pcx.ymin);
206         pcx.hres = LittleShort (pcx.hres);
207         pcx.vres = LittleShort (pcx.vres);
208         pcx.bytes_per_line = LittleShort (pcx.bytes_per_line);
209         pcx.palette_type = LittleShort (pcx.palette_type);
210
211         image_width = pcx.xmax + 1 - pcx.xmin;
212         image_height = pcx.ymax + 1 - pcx.ymin;
213         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)
214         {
215                 Con_Print("Bad pcx file\n");
216                 return NULL;
217         }
218         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
219                 return NULL;
220
221         palette = f + fs_filesize - 768;
222
223         image_rgba = Mem_Alloc(tempmempool, image_width*image_height*4);
224         if (!image_rgba)
225         {
226                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
227                 return NULL;
228         }
229         pbuf = image_rgba + image_width*image_height*3;
230         enddata = palette;
231
232         for (y = 0;y < image_height && fin < enddata;y++)
233         {
234                 a = pbuf + y * image_width;
235                 for (x = 0;x < image_width && fin < enddata;)
236                 {
237                         dataByte = *fin++;
238                         if(dataByte >= 0xC0)
239                         {
240                                 if (fin >= enddata)
241                                         break;
242                                 x2 = x + (dataByte & 0x3F);
243                                 dataByte = *fin++;
244                                 if (x2 > image_width)
245                                         x2 = image_width; // technically an error
246                                 while(x < x2)
247                                         a[x++] = dataByte;
248                         }
249                         else
250                                 a[x++] = dataByte;
251                 }
252                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
253                 while(x < image_width)
254                         a[x++] = 0;
255         }
256
257         a = image_rgba;
258         b = pbuf;
259
260         for(x = 0;x < image_width*image_height;x++)
261         {
262                 y = *b++ * 3;
263                 *a++ = palette[y];
264                 *a++ = palette[y+1];
265                 *a++ = palette[y+2];
266                 *a++ = 255;
267         }
268
269         return image_rgba;
270 }
271
272 /*
273 =========================================================
274
275 TARGA LOADING
276
277 =========================================================
278 */
279
280 typedef struct _TargaHeader
281 {
282         unsigned char   id_length, colormap_type, image_type;
283         unsigned short  colormap_index, colormap_length;
284         unsigned char   colormap_size;
285         unsigned short  x_origin, y_origin, width, height;
286         unsigned char   pixel_size, attributes;
287 }
288 TargaHeader;
289
290 void PrintTargaHeader(TargaHeader *t)
291 {
292         Con_Print("TargaHeader:\n");
293         Con_Printf("uint8 id_length = %i;\n", t->id_length);
294         Con_Printf("uint8 colormap_type = %i;\n", t->colormap_type);
295         Con_Printf("uint8 image_type = %i;\n", t->image_type);
296         Con_Printf("uint16 colormap_index = %i;\n", t->colormap_index);
297         Con_Printf("uint16 colormap_length = %i;\n", t->colormap_length);
298         Con_Printf("uint8 colormap_size = %i;\n", t->colormap_size);
299         Con_Printf("uint16 x_origin = %i;\n", t->x_origin);
300         Con_Printf("uint16 y_origin = %i;\n", t->y_origin);
301         Con_Printf("uint16 width = %i;\n", t->width);
302         Con_Printf("uint16 height = %i;\n", t->height);
303         Con_Printf("uint8 pixel_size = %i;\n", t->pixel_size);
304         Con_Printf("uint8 attributes = %i;\n", t->attributes);
305 }
306
307 /*
308 =============
309 LoadTGA
310 =============
311 */
312 qbyte *LoadTGA (qbyte *f, int matchwidth, int matchheight)
313 {
314         int x, y, row_inc, compressed, readpixelcount, red, green, blue, alpha, runlen, pindex;
315         qbyte *pixbuf, *image_rgba;
316         qbyte *fin, *enddata;
317         TargaHeader targa_header;
318         unsigned char palette[256*4], *p;
319
320         if (fs_filesize < 19)
321                 return NULL;
322
323         enddata = f + fs_filesize;
324
325         targa_header.id_length = f[0];
326         targa_header.colormap_type = f[1];
327         targa_header.image_type = f[2];
328
329         targa_header.colormap_index = f[3] + f[4] * 256;
330         targa_header.colormap_length = f[5] + f[6] * 256;
331         targa_header.colormap_size = f[7];
332         targa_header.x_origin = f[8] + f[9] * 256;
333         targa_header.y_origin = f[10] + f[11] * 256;
334         targa_header.width = image_width = f[12] + f[13] * 256;
335         targa_header.height = image_height = f[14] + f[15] * 256;
336         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
337         {
338                 Con_Print("LoadTGA: invalid size\n");
339                 PrintTargaHeader(&targa_header);
340                 return NULL;
341         }
342         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
343                 return NULL;
344         targa_header.pixel_size = f[16];
345         targa_header.attributes = f[17];
346
347         fin = f + 18;
348         if (targa_header.id_length != 0)
349                 fin += targa_header.id_length;  // skip TARGA image comment
350         if (targa_header.image_type == 2 || targa_header.image_type == 10)
351         {
352                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
353                 {
354                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
355                         PrintTargaHeader(&targa_header);
356                         return NULL;
357                 }
358         }
359         else if (targa_header.image_type == 1 || targa_header.image_type == 9)
360         {
361                 if (targa_header.pixel_size != 8)
362                 {
363                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
364                         PrintTargaHeader(&targa_header);
365                         return NULL;
366                 }
367                 if (targa_header.colormap_length > 256)
368                 {
369                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
370                         PrintTargaHeader(&targa_header);
371                         return NULL;
372                 }
373                 if (targa_header.colormap_index)
374                 {
375                         Con_Print("LoadTGA: colormap_index not supported\n");
376                         PrintTargaHeader(&targa_header);
377                         return NULL;
378                 }
379                 if (targa_header.colormap_size == 24)
380                 {
381                         for (x = 0;x < targa_header.colormap_length;x++)
382                         {
383                                 palette[x*4+2] = *fin++;
384                                 palette[x*4+1] = *fin++;
385                                 palette[x*4+0] = *fin++;
386                                 palette[x*4+3] = 255;
387                         }
388                 }
389                 else if (targa_header.colormap_size == 32)
390                 {
391                         for (x = 0;x < targa_header.colormap_length;x++)
392                         {
393                                 palette[x*4+2] = *fin++;
394                                 palette[x*4+1] = *fin++;
395                                 palette[x*4+0] = *fin++;
396                                 palette[x*4+3] = *fin++;
397                         }
398                 }
399                 else
400                 {
401                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
402                         PrintTargaHeader(&targa_header);
403                         return NULL;
404                 }
405         }
406         else if (targa_header.image_type == 3 || targa_header.image_type == 11)
407         {
408                 if (targa_header.pixel_size != 8)
409                 {
410                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
411                         PrintTargaHeader(&targa_header);
412                         return NULL;
413                 }
414         }
415         else
416         {
417                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
418                 PrintTargaHeader(&targa_header);
419                 return NULL;
420         }
421
422         if (targa_header.attributes & 0x10)
423         {
424                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
425                 return NULL;
426         }
427
428         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
429         if (!image_rgba)
430         {
431                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
432                 return NULL;
433         }
434
435         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
436         if ((targa_header.attributes & 0x20) == 0)
437         {
438                 pixbuf = image_rgba + (image_height - 1)*image_width*4;
439                 row_inc = -image_width*4*2;
440         }
441         else
442         {
443                 pixbuf = image_rgba;
444                 row_inc = 0;
445         }
446
447         compressed = targa_header.image_type == 9 || targa_header.image_type == 10 || targa_header.image_type == 11;
448         x = 0;
449         y = 0;
450         red = green = blue = alpha = 255;
451         while (y < image_height)
452         {
453                 // decoder is mostly the same whether it's compressed or not
454                 readpixelcount = 1000000;
455                 runlen = 1000000;
456                 if (compressed && fin < enddata)
457                 {
458                         runlen = *fin++;
459                         // high bit indicates this is an RLE compressed run
460                         if (runlen & 0x80)
461                                 readpixelcount = 1;
462                         runlen = 1 + (runlen & 0x7f);
463                 }
464
465                 while((runlen--) && y < image_height)
466                 {
467                         if (readpixelcount > 0)
468                         {
469                                 readpixelcount--;
470                                 red = green = blue = alpha = 255;
471                                 if (fin < enddata)
472                                 {
473                                         switch(targa_header.image_type)
474                                         {
475                                         case 1:
476                                         case 9:
477                                                 // colormapped
478                                                 pindex = *fin++;
479                                                 if (pindex >= targa_header.colormap_length)
480                                                         pindex = 0; // error
481                                                 p = palette + pindex * 4;
482                                                 red = p[0];
483                                                 green = p[1];
484                                                 blue = p[2];
485                                                 alpha = p[3];
486                                                 break;
487                                         case 2:
488                                         case 10:
489                                                 // BGR or BGRA
490                                                 blue = *fin++;
491                                                 if (fin < enddata)
492                                                         green = *fin++;
493                                                 if (fin < enddata)
494                                                         red = *fin++;
495                                                 if (targa_header.pixel_size == 32 && fin < enddata)
496                                                         alpha = *fin++;
497                                                 break;
498                                         case 3:
499                                         case 11:
500                                                 // greyscale
501                                                 red = green = blue = *fin++;
502                                                 break;
503                                         }
504                                 }
505                         }
506                         *pixbuf++ = red;
507                         *pixbuf++ = green;
508                         *pixbuf++ = blue;
509                         *pixbuf++ = alpha;
510                         x++;
511                         if (x == image_width)
512                         {
513                                 // end of line, advance to next
514                                 x = 0;
515                                 y++;
516                                 pixbuf += row_inc;
517                         }
518                 }
519         }
520
521         return image_rgba;
522 }
523
524 /*
525 ============
526 LoadLMP
527 ============
528 */
529 qbyte *LoadLMP (qbyte *f, int matchwidth, int matchheight)
530 {
531         qbyte *image_rgba;
532
533         if (fs_filesize < 9)
534         {
535                 Con_Print("LoadLMP: invalid LMP file\n");
536                 return NULL;
537         }
538
539         // parse the very complicated header *chuckle*
540         image_width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
541         image_height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
542         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
543         {
544                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
545                 return NULL;
546         }
547         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
548                 return NULL;
549
550         if (fs_filesize < 8 + image_width * image_height)
551         {
552                 Con_Print("LoadLMP: invalid LMP file\n");
553                 return NULL;
554         }
555
556         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
557         if (!image_rgba)
558         {
559                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
560                 return NULL;
561         }
562         Image_Copy8bitRGBA(f + 8, image_rgba, image_width * image_height, palette_complete);
563         return image_rgba;
564 }
565
566 typedef struct
567 {
568         char            name[32];
569         unsigned        width, height;
570         unsigned        offsets[MIPLEVELS];             // four mip maps stored
571         char            animname[32];                   // next frame in animation chain
572         int                     flags;
573         int                     contents;
574         int                     value;
575 } q2wal_t;
576
577 qbyte *LoadWAL (qbyte *f, int matchwidth, int matchheight)
578 {
579         qbyte *image_rgba;
580         const q2wal_t *inwal = (const void *)f;
581
582         if (fs_filesize < (int) sizeof(q2wal_t))
583         {
584                 Con_Print("LoadWAL: invalid WAL file\n");
585                 return NULL;
586         }
587
588         image_width = LittleLong(inwal->width);
589         image_height = LittleLong(inwal->height);
590         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
591         {
592                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
593                 return NULL;
594         }
595         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
596                 return NULL;
597
598         if ((int) fs_filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
599         {
600                 Con_Print("LoadWAL: invalid WAL file\n");
601                 return NULL;
602         }
603
604         image_rgba = Mem_Alloc(tempmempool, image_width * image_height * 4);
605         if (!image_rgba)
606         {
607                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
608                 return NULL;
609         }
610         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
611         return image_rgba;
612 }
613
614
615
616 /*
617 ============
618 LoadLMP
619 ============
620 */
621 qbyte *LoadLMPAs8Bit (qbyte *f, int matchwidth, int matchheight)
622 {
623         qbyte *image_8bit;
624
625         if (fs_filesize < 9)
626         {
627                 Con_Print("LoadLMPAs8Bit: invalid LMP file\n");
628                 return NULL;
629         }
630
631         // parse the very complicated header *chuckle*
632         image_width = f[0] + f[1] * 256 + f[2] * 65536 + f[3] * 16777216;
633         image_height = f[4] + f[5] * 256 + f[6] * 65536 + f[7] * 16777216;
634         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
635         {
636                 Con_Printf("LoadLMPAs8Bit: invalid size %ix%i\n", image_width, image_height);
637                 return NULL;
638         }
639         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
640                 return NULL;
641
642         if (fs_filesize < 8 + image_width * image_height)
643         {
644                 Con_Print("LoadLMPAs8Bit: invalid LMP file\n");
645                 return NULL;
646         }
647
648         image_8bit = Mem_Alloc(tempmempool, image_width * image_height);
649         if (!image_8bit)
650         {
651                 Con_Printf("LoadLMPAs8Bit: not enough memory for %i by %i image\n", image_width, image_height);
652                 return NULL;
653         }
654         memcpy(image_8bit, f + 8, image_width * image_height);
655         return image_8bit;
656 }
657
658 void Image_StripImageExtension (const char *in, char *out)
659 {
660         const char *end, *temp;
661         end = in + strlen(in);
662         if ((end - in) >= 4)
663         {
664                 temp = end - 4;
665                 if (strcmp(temp, ".tga") == 0
666                  || strcmp(temp, ".pcx") == 0
667                  || strcmp(temp, ".lmp") == 0
668                  || strcmp(temp, ".png") == 0
669                  || strcmp(temp, ".jpg") == 0)
670                         end = temp;
671                 while (in < end)
672                         *out++ = *in++;
673                 *out++ = 0;
674         }
675         else
676                 strcpy(out, in);
677 }
678
679 struct
680 {
681         const char *formatstring;
682         qbyte *(*loadfunc)(qbyte *f, int matchwidth, int matchheight);
683 }
684 imageformats[] =
685 {
686         {"override/%s.tga", LoadTGA},
687         {"override/%s.jpg", JPEG_LoadImage},
688         {"textures/%s.tga", LoadTGA},
689         {"textures/%s.jpg", JPEG_LoadImage},
690         {"textures/%s.pcx", LoadPCX},
691         {"textures/%s.wal", LoadWAL},
692         {"%s.tga", LoadTGA},
693         {"%s.jpg", JPEG_LoadImage},
694         {"%s.pcx", LoadPCX},
695         {"%s.lmp", LoadLMP},
696         {NULL, NULL}
697 };
698
699 qbyte *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
700 {
701         int i;
702         qbyte *f, *data = NULL;
703         char basename[MAX_QPATH], name[MAX_QPATH], *c;
704         if (developer_memorydebug.integer)
705                 Mem_CheckSentinelsGlobal();
706         Image_StripImageExtension(filename, basename); // strip filename extensions to allow replacement by other types
707         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
708         for (c = basename;*c;c++)
709                 if (*c == '*')
710                         *c = '#';
711         for (i = 0;imageformats[i].formatstring;i++)
712         {
713                 sprintf (name, imageformats[i].formatstring, basename);
714                 f = FS_LoadFile(name, tempmempool, true);
715                 if (f)
716                 {
717                         data = imageformats[i].loadfunc(f, matchwidth, matchheight);
718                         Mem_Free(f);
719                         if (data)
720                         {
721                                 Con_DPrintf("loaded image %s (%dx%d)\n", name, image_width, image_height);
722                                 if (developer_memorydebug.integer)
723                                         Mem_CheckSentinelsGlobal();
724                                 return data;
725                         }
726                 }
727         }
728         if (complain)
729         {
730                 Con_Printf("Couldn't load %s using ", filename);
731                 for (i = 0;imageformats[i].formatstring;i++)
732                 {
733                         sprintf (name, imageformats[i].formatstring, basename);
734                         Con_Printf(i == 0 ? "\"%s\"" : (imageformats[i+1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), imageformats[i].formatstring);
735                 }
736         }
737         if (developer_memorydebug.integer)
738                 Mem_CheckSentinelsGlobal();
739         return NULL;
740 }
741
742 int image_makemask (const qbyte *in, qbyte *out, int size)
743 {
744         int i, count;
745         count = 0;
746         for (i = 0;i < size;i++)
747         {
748                 out[0] = out[1] = out[2] = 255;
749                 out[3] = in[3];
750                 if (in[3] != 255)
751                         count++;
752                 in += 4;
753                 out += 4;
754         }
755         return count;
756 }
757
758 qbyte* loadimagepixelsmask (const char *filename, qboolean complain, int matchwidth, int matchheight)
759 {
760         qbyte *in, *data;
761         in = data = loadimagepixels(filename, complain, matchwidth, matchheight);
762         if (!data)
763                 return NULL;
764         if (image_makemask(data, data, image_width * image_height))
765                 return data; // some transparency
766         else
767         {
768                 Mem_Free(data);
769                 return NULL; // all opaque
770         }
771 }
772
773 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
774 {
775         qbyte *data;
776         rtexture_t *rt;
777         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
778                 return 0;
779         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
780         Mem_Free(data);
781         return rt;
782 }
783
784 rtexture_t *loadtextureimagemask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
785 {
786         qbyte *data;
787         rtexture_t *rt;
788         if (!(data = loadimagepixelsmask (filename, complain, matchwidth, matchheight)))
789                 return 0;
790         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
791         Mem_Free(data);
792         return rt;
793 }
794
795 rtexture_t *image_masktex;
796 rtexture_t *image_nmaptex;
797 rtexture_t *loadtextureimagewithmask (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
798 {
799         qbyte *data;
800         rtexture_t *rt;
801         image_masktex = NULL;
802         image_nmaptex = NULL;
803         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
804                 return 0;
805
806         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
807
808         if (flags & TEXF_ALPHA && image_makemask(data, data, image_width * image_height))
809                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
810
811         Mem_Free(data);
812         return rt;
813 }
814
815 rtexture_t *loadtextureimagewithmaskandnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
816 {
817         qbyte *data, *data2;
818         rtexture_t *rt;
819         image_masktex = NULL;
820         image_nmaptex = NULL;
821         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
822                 return 0;
823
824         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
825
826         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
827
828         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
829         image_nmaptex = R_LoadTexture2D(pool, va("%s_nmap", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
830
831         if (flags & TEXF_ALPHA && image_makemask(data, data2, image_width * image_height))
832                 image_masktex = R_LoadTexture2D(pool, va("%s_mask", filename), image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
833
834         Mem_Free(data2);
835
836         Mem_Free(data);
837         return rt;
838 }
839
840 rtexture_t *loadtextureimagebumpasnmap (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags, float bumpscale)
841 {
842         qbyte *data, *data2;
843         rtexture_t *rt;
844         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
845                 return 0;
846         data2 = Mem_Alloc(tempmempool, image_width * image_height * 4);
847
848         Image_HeightmapToNormalmap(data, data2, image_width, image_height, (flags & TEXF_CLAMP) != 0, bumpscale);
849         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data2, TEXTYPE_RGBA, flags, NULL);
850
851         Mem_Free(data2);
852         Mem_Free(data);
853         return rt;
854 }
855
856 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const qbyte *data, qbyte *buffer)
857 {
858         qboolean ret;
859         qbyte *out;
860         const qbyte *in, *end;
861
862         memset (buffer, 0, 18);
863         buffer[2] = 2;          // uncompressed type
864         buffer[12] = (width >> 0) & 0xFF;
865         buffer[13] = (width >> 8) & 0xFF;
866         buffer[14] = (height >> 0) & 0xFF;
867         buffer[15] = (height >> 8) & 0xFF;
868         buffer[16] = 24;        // pixel size
869
870         // swap rgb to bgr
871         in = data;
872         out = buffer + 18;
873         end = in + width*height*3;
874         for (;in < end;in += 3)
875         {
876                 *out++ = in[2];
877                 *out++ = in[1];
878                 *out++ = in[0];
879         }
880         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
881
882         return ret;
883 }
884
885 void Image_WriteTGARGB (const char *filename, int width, int height, const qbyte *data)
886 {
887         int y;
888         qbyte *buffer, *out;
889         const qbyte *in, *end;
890
891         buffer = Mem_Alloc(tempmempool, width*height*3 + 18);
892
893         memset (buffer, 0, 18);
894         buffer[2] = 2;          // uncompressed type
895         buffer[12] = (width >> 0) & 0xFF;
896         buffer[13] = (width >> 8) & 0xFF;
897         buffer[14] = (height >> 0) & 0xFF;
898         buffer[15] = (height >> 8) & 0xFF;
899         buffer[16] = 24;        // pixel size
900
901         // swap rgb to bgr and flip upside down
902         out = buffer + 18;
903         for (y = height - 1;y >= 0;y--)
904         {
905                 in = data + y * width * 3;
906                 end = in + width * 3;
907                 for (;in < end;in += 3)
908                 {
909                         *out++ = in[2];
910                         *out++ = in[1];
911                         *out++ = in[0];
912                 }
913         }
914         FS_WriteFile (filename, buffer, width*height*3 + 18 );
915
916         Mem_Free(buffer);
917 }
918
919 void Image_WriteTGARGBA (const char *filename, int width, int height, const qbyte *data)
920 {
921         int y;
922         qbyte *buffer, *out;
923         const qbyte *in, *end;
924
925         buffer = Mem_Alloc(tempmempool, width*height*4 + 18);
926
927         memset (buffer, 0, 18);
928         buffer[2] = 2;          // uncompressed type
929         buffer[12] = (width >> 0) & 0xFF;
930         buffer[13] = (width >> 8) & 0xFF;
931         buffer[14] = (height >> 0) & 0xFF;
932         buffer[15] = (height >> 8) & 0xFF;
933         buffer[16] = 32;        // pixel size
934
935         // swap rgba to bgra and flip upside down
936         out = buffer + 18;
937         for (y = height - 1;y >= 0;y--)
938         {
939                 in = data + y * width * 4;
940                 end = in + width * 4;
941                 for (;in < end;in += 4)
942                 {
943                         *out++ = in[2];
944                         *out++ = in[1];
945                         *out++ = in[0];
946                         *out++ = in[3];
947                 }
948         }
949         FS_WriteFile (filename, buffer, width*height*4 + 18 );
950
951         Mem_Free(buffer);
952 }
953
954 qboolean Image_CheckAlpha(const qbyte *data, int size, qboolean rgba)
955 {
956         const qbyte *end;
957         if (rgba)
958         {
959                 // check alpha bytes
960                 for (end = data + size * 4, data += 3;data < end;data += 4)
961                         if (*data < 255)
962                                 return 1;
963         }
964         else
965         {
966                 // color 255 is transparent
967                 for (end = data + size;data < end;data++)
968                         if (*data == 255)
969                                 return 1;
970         }
971         return 0;
972 }
973
974 static void Image_Resample32LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
975 {
976         int             j, xi, oldx = 0, f, fstep, endx, lerp;
977         fstep = (int) (inwidth*65536.0f/outwidth);
978         endx = (inwidth-1);
979         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
980         {
981                 xi = f >> 16;
982                 if (xi != oldx)
983                 {
984                         in += (xi - oldx) * 4;
985                         oldx = xi;
986                 }
987                 if (xi < endx)
988                 {
989                         lerp = f & 0xFFFF;
990                         *out++ = (qbyte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
991                         *out++ = (qbyte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
992                         *out++ = (qbyte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
993                         *out++ = (qbyte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
994                 }
995                 else // last pixel of the line has no pixel to lerp to
996                 {
997                         *out++ = in[0];
998                         *out++ = in[1];
999                         *out++ = in[2];
1000                         *out++ = in[3];
1001                 }
1002         }
1003 }
1004
1005 static void Image_Resample24LerpLine (const qbyte *in, qbyte *out, int inwidth, int outwidth)
1006 {
1007         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1008         fstep = (int) (inwidth*65536.0f/outwidth);
1009         endx = (inwidth-1);
1010         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1011         {
1012                 xi = f >> 16;
1013                 if (xi != oldx)
1014                 {
1015                         in += (xi - oldx) * 3;
1016                         oldx = xi;
1017                 }
1018                 if (xi < endx)
1019                 {
1020                         lerp = f & 0xFFFF;
1021                         *out++ = (qbyte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1022                         *out++ = (qbyte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1023                         *out++ = (qbyte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1024                 }
1025                 else // last pixel of the line has no pixel to lerp to
1026                 {
1027                         *out++ = in[0];
1028                         *out++ = in[1];
1029                         *out++ = in[2];
1030                 }
1031         }
1032 }
1033
1034 int resamplerowsize = 0;
1035 qbyte *resamplerow1 = NULL;
1036 qbyte *resamplerow2 = NULL;
1037 mempool_t *resamplemempool = NULL;
1038
1039 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (qbyte) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1040 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1041 {
1042         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1043         qbyte *out;
1044         const qbyte *inrow;
1045         out = outdata;
1046         fstep = (int) (inheight*65536.0f/outheight);
1047
1048         inrow = indata;
1049         oldy = 0;
1050         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1051         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1052         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1053         {
1054                 yi = f >> 16;
1055                 if (yi < endy)
1056                 {
1057                         lerp = f & 0xFFFF;
1058                         if (yi != oldy)
1059                         {
1060                                 inrow = (qbyte *)indata + inwidth4*yi;
1061                                 if (yi == oldy+1)
1062                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1063                                 else
1064                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1065                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1066                                 oldy = yi;
1067                         }
1068                         j = outwidth - 4;
1069                         while(j >= 0)
1070                         {
1071                                 LERPBYTE( 0);
1072                                 LERPBYTE( 1);
1073                                 LERPBYTE( 2);
1074                                 LERPBYTE( 3);
1075                                 LERPBYTE( 4);
1076                                 LERPBYTE( 5);
1077                                 LERPBYTE( 6);
1078                                 LERPBYTE( 7);
1079                                 LERPBYTE( 8);
1080                                 LERPBYTE( 9);
1081                                 LERPBYTE(10);
1082                                 LERPBYTE(11);
1083                                 LERPBYTE(12);
1084                                 LERPBYTE(13);
1085                                 LERPBYTE(14);
1086                                 LERPBYTE(15);
1087                                 out += 16;
1088                                 resamplerow1 += 16;
1089                                 resamplerow2 += 16;
1090                                 j -= 4;
1091                         }
1092                         if (j & 2)
1093                         {
1094                                 LERPBYTE( 0);
1095                                 LERPBYTE( 1);
1096                                 LERPBYTE( 2);
1097                                 LERPBYTE( 3);
1098                                 LERPBYTE( 4);
1099                                 LERPBYTE( 5);
1100                                 LERPBYTE( 6);
1101                                 LERPBYTE( 7);
1102                                 out += 8;
1103                                 resamplerow1 += 8;
1104                                 resamplerow2 += 8;
1105                         }
1106                         if (j & 1)
1107                         {
1108                                 LERPBYTE( 0);
1109                                 LERPBYTE( 1);
1110                                 LERPBYTE( 2);
1111                                 LERPBYTE( 3);
1112                                 out += 4;
1113                                 resamplerow1 += 4;
1114                                 resamplerow2 += 4;
1115                         }
1116                         resamplerow1 -= outwidth4;
1117                         resamplerow2 -= outwidth4;
1118                 }
1119                 else
1120                 {
1121                         if (yi != oldy)
1122                         {
1123                                 inrow = (qbyte *)indata + inwidth4*yi;
1124                                 if (yi == oldy+1)
1125                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1126                                 else
1127                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1128                                 oldy = yi;
1129                         }
1130                         memcpy(out, resamplerow1, outwidth4);
1131                 }
1132         }
1133 }
1134
1135 void Image_Resample32Nearest(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1136 {
1137         int i, j;
1138         unsigned frac, fracstep;
1139         // relies on int being 4 bytes
1140         int *inrow, *out;
1141         out = outdata;
1142
1143         fracstep = inwidth*0x10000/outwidth;
1144         for (i = 0;i < outheight;i++)
1145         {
1146                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1147                 frac = fracstep >> 1;
1148                 j = outwidth - 4;
1149                 while (j >= 0)
1150                 {
1151                         out[0] = inrow[frac >> 16];frac += fracstep;
1152                         out[1] = inrow[frac >> 16];frac += fracstep;
1153                         out[2] = inrow[frac >> 16];frac += fracstep;
1154                         out[3] = inrow[frac >> 16];frac += fracstep;
1155                         out += 4;
1156                         j -= 4;
1157                 }
1158                 if (j & 2)
1159                 {
1160                         out[0] = inrow[frac >> 16];frac += fracstep;
1161                         out[1] = inrow[frac >> 16];frac += fracstep;
1162                         out += 2;
1163                 }
1164                 if (j & 1)
1165                 {
1166                         out[0] = inrow[frac >> 16];frac += fracstep;
1167                         out += 1;
1168                 }
1169         }
1170 }
1171
1172 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1173 {
1174         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1175         qbyte *out;
1176         const qbyte *inrow;
1177         out = outdata;
1178         fstep = (int) (inheight*65536.0f/outheight);
1179
1180         inrow = indata;
1181         oldy = 0;
1182         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1183         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1184         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1185         {
1186                 yi = f >> 16;
1187                 if (yi < endy)
1188                 {
1189                         lerp = f & 0xFFFF;
1190                         if (yi != oldy)
1191                         {
1192                                 inrow = (qbyte *)indata + inwidth3*yi;
1193                                 if (yi == oldy+1)
1194                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1195                                 else
1196                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1197                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1198                                 oldy = yi;
1199                         }
1200                         j = outwidth - 4;
1201                         while(j >= 0)
1202                         {
1203                                 LERPBYTE( 0);
1204                                 LERPBYTE( 1);
1205                                 LERPBYTE( 2);
1206                                 LERPBYTE( 3);
1207                                 LERPBYTE( 4);
1208                                 LERPBYTE( 5);
1209                                 LERPBYTE( 6);
1210                                 LERPBYTE( 7);
1211                                 LERPBYTE( 8);
1212                                 LERPBYTE( 9);
1213                                 LERPBYTE(10);
1214                                 LERPBYTE(11);
1215                                 out += 12;
1216                                 resamplerow1 += 12;
1217                                 resamplerow2 += 12;
1218                                 j -= 4;
1219                         }
1220                         if (j & 2)
1221                         {
1222                                 LERPBYTE( 0);
1223                                 LERPBYTE( 1);
1224                                 LERPBYTE( 2);
1225                                 LERPBYTE( 3);
1226                                 LERPBYTE( 4);
1227                                 LERPBYTE( 5);
1228                                 out += 6;
1229                                 resamplerow1 += 6;
1230                                 resamplerow2 += 6;
1231                         }
1232                         if (j & 1)
1233                         {
1234                                 LERPBYTE( 0);
1235                                 LERPBYTE( 1);
1236                                 LERPBYTE( 2);
1237                                 out += 3;
1238                                 resamplerow1 += 3;
1239                                 resamplerow2 += 3;
1240                         }
1241                         resamplerow1 -= outwidth3;
1242                         resamplerow2 -= outwidth3;
1243                 }
1244                 else
1245                 {
1246                         if (yi != oldy)
1247                         {
1248                                 inrow = (qbyte *)indata + inwidth3*yi;
1249                                 if (yi == oldy+1)
1250                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1251                                 else
1252                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1253                                 oldy = yi;
1254                         }
1255                         memcpy(out, resamplerow1, outwidth3);
1256                 }
1257         }
1258 }
1259
1260 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1261 {
1262         int i, j, f, inwidth3 = inwidth * 3;
1263         unsigned frac, fracstep;
1264         qbyte *inrow, *out;
1265         out = outdata;
1266
1267         fracstep = inwidth*0x10000/outwidth;
1268         for (i = 0;i < outheight;i++)
1269         {
1270                 inrow = (qbyte *)indata + inwidth3*(i*inheight/outheight);
1271                 frac = fracstep >> 1;
1272                 j = outwidth - 4;
1273                 while (j >= 0)
1274                 {
1275                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1276                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1277                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1278                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1279                         j -= 4;
1280                 }
1281                 if (j & 2)
1282                 {
1283                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1284                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1285                         out += 2;
1286                 }
1287                 if (j & 1)
1288                 {
1289                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1290                         out += 1;
1291                 }
1292         }
1293 }
1294
1295 /*
1296 ================
1297 Image_Resample
1298 ================
1299 */
1300 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1301 {
1302         if (indepth != 1 || outdepth != 1)
1303                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1304         if (resamplerowsize < outwidth*4)
1305         {
1306                 if (resamplerow1)
1307                         Mem_Free(resamplerow1);
1308                 resamplerowsize = outwidth*4;
1309                 if (!resamplemempool)
1310                         resamplemempool = Mem_AllocPool("Image Scaling Buffer", 0, NULL);
1311                 resamplerow1 = Mem_Alloc(resamplemempool, resamplerowsize*2);
1312                 resamplerow2 = resamplerow1 + resamplerowsize;
1313         }
1314         if (bytesperpixel == 4)
1315         {
1316                 if (quality)
1317                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1318                 else
1319                         Image_Resample32Nearest(indata, inwidth, inheight, outdata, outwidth, outheight);
1320         }
1321         else if (bytesperpixel == 3)
1322         {
1323                 if (quality)
1324                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1325                 else
1326                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1327         }
1328         else
1329                 Sys_Error("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1330 }
1331
1332 // in can be the same as out
1333 void Image_MipReduce(const qbyte *in, qbyte *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1334 {
1335         int x, y, nextrow;
1336         if (*depth != 1 || destdepth != 1)
1337                 Sys_Error("Image_Resample: 3D resampling not supported\n");
1338         nextrow = *width * bytesperpixel;
1339         if (*width > destwidth)
1340         {
1341                 *width >>= 1;
1342                 if (*height > destheight)
1343                 {
1344                         // reduce both
1345                         *height >>= 1;
1346                         if (bytesperpixel == 4)
1347                         {
1348                                 for (y = 0;y < *height;y++)
1349                                 {
1350                                         for (x = 0;x < *width;x++)
1351                                         {
1352                                                 out[0] = (qbyte) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1353                                                 out[1] = (qbyte) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1354                                                 out[2] = (qbyte) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1355                                                 out[3] = (qbyte) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1356                                                 out += 4;
1357                                                 in += 8;
1358                                         }
1359                                         in += nextrow; // skip a line
1360                                 }
1361                         }
1362                         else if (bytesperpixel == 3)
1363                         {
1364                                 for (y = 0;y < *height;y++)
1365                                 {
1366                                         for (x = 0;x < *width;x++)
1367                                         {
1368                                                 out[0] = (qbyte) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1369                                                 out[1] = (qbyte) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1370                                                 out[2] = (qbyte) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1371                                                 out += 3;
1372                                                 in += 6;
1373                                         }
1374                                         in += nextrow; // skip a line
1375                                 }
1376                         }
1377                         else
1378                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1379                 }
1380                 else
1381                 {
1382                         // reduce width
1383                         if (bytesperpixel == 4)
1384                         {
1385                                 for (y = 0;y < *height;y++)
1386                                 {
1387                                         for (x = 0;x < *width;x++)
1388                                         {
1389                                                 out[0] = (qbyte) ((in[0] + in[4]) >> 1);
1390                                                 out[1] = (qbyte) ((in[1] + in[5]) >> 1);
1391                                                 out[2] = (qbyte) ((in[2] + in[6]) >> 1);
1392                                                 out[3] = (qbyte) ((in[3] + in[7]) >> 1);
1393                                                 out += 4;
1394                                                 in += 8;
1395                                         }
1396                                 }
1397                         }
1398                         else if (bytesperpixel == 3)
1399                         {
1400                                 for (y = 0;y < *height;y++)
1401                                 {
1402                                         for (x = 0;x < *width;x++)
1403                                         {
1404                                                 out[0] = (qbyte) ((in[0] + in[3]) >> 1);
1405                                                 out[1] = (qbyte) ((in[1] + in[4]) >> 1);
1406                                                 out[2] = (qbyte) ((in[2] + in[5]) >> 1);
1407                                                 out += 3;
1408                                                 in += 6;
1409                                         }
1410                                 }
1411                         }
1412                         else
1413                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1414                 }
1415         }
1416         else
1417         {
1418                 if (*height > destheight)
1419                 {
1420                         // reduce height
1421                         *height >>= 1;
1422                         if (bytesperpixel == 4)
1423                         {
1424                                 for (y = 0;y < *height;y++)
1425                                 {
1426                                         for (x = 0;x < *width;x++)
1427                                         {
1428                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1429                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1430                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1431                                                 out[3] = (qbyte) ((in[3] + in[nextrow+3]) >> 1);
1432                                                 out += 4;
1433                                                 in += 4;
1434                                         }
1435                                         in += nextrow; // skip a line
1436                                 }
1437                         }
1438                         else if (bytesperpixel == 3)
1439                         {
1440                                 for (y = 0;y < *height;y++)
1441                                 {
1442                                         for (x = 0;x < *width;x++)
1443                                         {
1444                                                 out[0] = (qbyte) ((in[0] + in[nextrow  ]) >> 1);
1445                                                 out[1] = (qbyte) ((in[1] + in[nextrow+1]) >> 1);
1446                                                 out[2] = (qbyte) ((in[2] + in[nextrow+2]) >> 1);
1447                                                 out += 3;
1448                                                 in += 3;
1449                                         }
1450                                         in += nextrow; // skip a line
1451                                 }
1452                         }
1453                         else
1454                                 Sys_Error("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1455                 }
1456                 else
1457                         Sys_Error("Image_MipReduce: desired size already achieved\n");
1458         }
1459 }
1460
1461 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1462 {
1463         int x, y;
1464         const unsigned char *p0, *p1, *p2;
1465         unsigned char *out;
1466         float iwidth, iheight, ibumpscale, n[3];
1467         iwidth = 1.0f / width;
1468         iheight = 1.0f / height;
1469         ibumpscale = (255.0f * 3.0f) / bumpscale;
1470         out = outpixels;
1471         for (y = 0;y < height;y++)
1472         {
1473                 for (x = 0;x < width;x++)
1474                 {
1475                         p0 = inpixels + (y * width + x) * 4;
1476                         if (x == width - 1)
1477                         {
1478                                 if (clamp)
1479                                         p1 = inpixels + (y * width + x) * 4;
1480                                 else
1481                                         p1 = inpixels + (y * width) * 4;
1482                         }
1483                         else
1484                                 p1 = inpixels + (y * width + x + 1) * 4;
1485                         if (y == height - 1)
1486                         {
1487                                 if (clamp)
1488                                         p2 = inpixels + (y * width + x) * 4;
1489                                 else
1490                                         p2 = inpixels + x * 4;
1491                         }
1492                         else
1493                                 p2 = inpixels + ((y + 1) * width + x) * 4;
1494                         /*
1495                         dv[0][0] = iwidth;
1496                         dv[0][1] = 0;
1497                         dv[0][2] = ((p0[0] + p0[1] + p0[2]) * ibumpscale) - ((p1[0] + p1[1] + p1[2]) * ibumpscale);
1498                         dv[1][0] = 0;
1499                         dv[1][1] = iheight;
1500                         dv[1][2] = ((p2[0] + p2[1] + p2[2]) * ibumpscale) - ((p0[0] + p0[1] + p0[2]) * ibumpscale);
1501                         n[0] = dv[0][1]*dv[1][2]-dv[0][2]*dv[1][1];
1502                         n[1] = dv[0][2]*dv[1][0]-dv[0][0]*dv[1][2];
1503                         n[2] = dv[0][0]*dv[1][1]-dv[0][1]*dv[1][0];
1504                         */
1505                         n[0] = ((p0[0] + p0[1] + p0[2]) - (p1[0] + p1[1] + p1[2]));
1506                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p0[0] + p0[1] + p0[2]));
1507                         n[2] = ibumpscale;
1508                         VectorNormalize(n);
1509                         /*
1510                         // this should work for the bottom right triangle if anyone wants
1511                         // code for that for some reason
1512                         n[0] = ((p3[0] + p3[1] + p3[2]) - (p1[0] + p1[1] + p1[2]));
1513                         n[1] = ((p2[0] + p2[1] + p2[2]) - (p3[0] + p3[1] + p3[2]));
1514                         n[2] = ibumpscale;
1515                         VectorNormalize(n);
1516                         */
1517                         out[0] = 128.0f + n[0] * 127.0f;
1518                         out[1] = 128.0f + n[1] * 127.0f;
1519                         out[2] = 128.0f + n[2] * 127.0f;
1520                         out[3] = 255;
1521                         out += 4;
1522                 }
1523         }
1524 }
1525
1526 int image_loadskin(imageskin_t *s, char *shadername)
1527 {
1528         int j;
1529         qbyte *bumppixels;
1530         int bumppixels_width, bumppixels_height;
1531         char name[MAX_QPATH];
1532         Image_StripImageExtension(shadername, name);
1533         memset(s, 0, sizeof(*s));
1534         s->basepixels = loadimagepixels(name, false, 0, 0);
1535         if (s->basepixels == NULL)
1536                 return false;
1537         s->basepixels_width = image_width;
1538         s->basepixels_height = image_height;
1539
1540         bumppixels = NULL;bumppixels_width = 0;bumppixels_height = 0;
1541         if (Image_CheckAlpha(s->basepixels, s->basepixels_width * s->basepixels_height, true))
1542         {
1543                 s->maskpixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1544                 s->maskpixels_width = s->basepixels_width;
1545                 s->maskpixels_height = s->basepixels_height;
1546                 memcpy(s->maskpixels, s->basepixels, s->maskpixels_width * s->maskpixels_height * 4);
1547                 for (j = 0;j < s->basepixels_width * s->basepixels_height * 4;j += 4)
1548                 {
1549                         s->maskpixels[j+0] = 255;
1550                         s->maskpixels[j+1] = 255;
1551                         s->maskpixels[j+2] = 255;
1552                 }
1553         }
1554
1555         // _luma is supported for tenebrae compatibility
1556         // (I think it's a very stupid name, but oh well)
1557         if ((s->glowpixels = loadimagepixels(va("%s_glow", name), false, 0, 0)) != NULL
1558          || (s->glowpixels = loadimagepixels(va("%s_luma", name), false, 0, 0)) != NULL)
1559         {
1560                 s->glowpixels_width = image_width;
1561                 s->glowpixels_height = image_height;
1562         }
1563         // _norm is the name used by tenebrae
1564         // (I don't like the name much)
1565         if ((s->nmappixels = loadimagepixels(va("%s_norm", name), false, 0, 0)) != NULL)
1566         {
1567                 s->nmappixels_width = image_width;
1568                 s->nmappixels_height = image_height;
1569         }
1570         else if ((bumppixels = loadimagepixels(va("%s_bump", name), false, 0, 0)) != NULL)
1571         {
1572                 bumppixels_width = image_width;
1573                 bumppixels_height = image_height;
1574         }
1575         if ((s->glosspixels = loadimagepixels(va("%s_gloss", name), false, 0, 0)) != NULL)
1576         {
1577                 s->glosspixels_width = image_width;
1578                 s->glosspixels_height = image_height;
1579         }
1580         if ((s->pantspixels = loadimagepixels(va("%s_pants", name), false, 0, 0)) != NULL)
1581         {
1582                 s->pantspixels_width = image_width;
1583                 s->pantspixels_height = image_height;
1584         }
1585         if ((s->shirtpixels = loadimagepixels(va("%s_shirt", name), false, 0, 0)) != NULL)
1586         {
1587                 s->shirtpixels_width = image_width;
1588                 s->shirtpixels_height = image_height;
1589         }
1590
1591         if (s->nmappixels == NULL)
1592         {
1593                 if (bumppixels != NULL)
1594                 {
1595                         if (r_shadow_bumpscale_bumpmap.value > 0)
1596                         {
1597                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, bumppixels_width * bumppixels_height * 4);
1598                                 s->nmappixels_width = bumppixels_width;
1599                                 s->nmappixels_height = bumppixels_height;
1600                                 Image_HeightmapToNormalmap(bumppixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_bumpmap.value);
1601                         }
1602                 }
1603                 else
1604                 {
1605                         if (r_shadow_bumpscale_basetexture.value > 0)
1606                         {
1607                                 s->nmappixels = Mem_Alloc(loadmodel->mempool, s->basepixels_width * s->basepixels_height * 4);
1608                                 s->nmappixels_width = s->basepixels_width;
1609                                 s->nmappixels_height = s->basepixels_height;
1610                                 Image_HeightmapToNormalmap(s->basepixels, s->nmappixels, s->nmappixels_width, s->nmappixels_height, false, r_shadow_bumpscale_basetexture.value);
1611                         }
1612                 }
1613         }
1614         if (bumppixels != NULL)
1615                 Mem_Free(bumppixels);
1616         return true;
1617 }
1618
1619 void image_freeskin(imageskin_t *s)
1620 {
1621         if (s->basepixels)
1622                 Mem_Free(s->basepixels);
1623         if (s->maskpixels)
1624                 Mem_Free(s->maskpixels);
1625         if (s->nmappixels)
1626                 Mem_Free(s->nmappixels);
1627         if (s->glowpixels)
1628                 Mem_Free(s->glowpixels);
1629         if (s->glosspixels)
1630                 Mem_Free(s->glosspixels);
1631         if (s->pantspixels)
1632                 Mem_Free(s->pantspixels);
1633         if (s->shirtpixels)
1634                 Mem_Free(s->shirtpixels);
1635         memset(s, 0, sizeof(*s));
1636 }
1637