7539acdd95583256cafc53075adec5ea9401e0ea
[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, pix_inc, row_inc, red, green, blue, alpha, runlen, 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         switch (targa_header.image_type & ~8)
390         {
391         case 2:
392                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
393                 {
394                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
395                         PrintTargaHeader(&targa_header);
396                         return NULL;
397                 }
398                 break;
399         case 3:
400                 // set up a palette to make the loader easier
401                 for (x = 0;x < 256;x++)
402                 {
403                         palette[x*4+2] = x;
404                         palette[x*4+1] = x;
405                         palette[x*4+0] = x;
406                         palette[x*4+3] = 255;
407                 }
408                 // fall through to colormap case
409         case 1:
410                 if (targa_header.pixel_size != 8)
411                 {
412                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
413                         PrintTargaHeader(&targa_header);
414                         return NULL;
415                 }
416                 break;
417         default:
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         x = 0;
457         y = 0;
458         red = green = blue = alpha = 255;
459         pix_inc = 1;
460         if ((targa_header.image_type & ~8) == 2)
461                 pix_inc = targa_header.pixel_size / 8;
462         switch (targa_header.image_type)
463         {
464         case 1: // colormapped, uncompressed
465         case 3: // greyscale, uncompressed
466                 if (fin + image_width * image_height * pix_inc > enddata)
467                         break;
468                 for (y = 0;y < image_height;y++, pixbuf += row_inc)
469                 {
470                         for (x = 0;x < image_width;x++)
471                         {
472                                 p = palette + *fin++ * 4;
473                                 *pixbuf++ = p[0];
474                                 *pixbuf++ = p[1];
475                                 *pixbuf++ = p[2];
476                                 *pixbuf++ = p[3];
477                         }
478                 }
479                 break;
480         case 2:
481                 // BGR or BGRA, uncompressed
482                 if (fin + image_width * image_height * pix_inc > enddata)
483                         break;
484                 if (targa_header.pixel_size == 32 && alphabits)
485                 {
486                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
487                         {
488                                 for (x = 0;x < image_width;x++, fin += pix_inc)
489                                 {
490                                         *pixbuf++ = fin[2];
491                                         *pixbuf++ = fin[1];
492                                         *pixbuf++ = fin[0];
493                                         *pixbuf++ = fin[3];
494                                 }
495                         }
496                 }
497                 else
498                 {
499                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
500                         {
501                                 for (x = 0;x < image_width;x++, fin += pix_inc)
502                                 {
503                                         *pixbuf++ = fin[2];
504                                         *pixbuf++ = fin[1];
505                                         *pixbuf++ = fin[0];
506                                         *pixbuf++ = 255;
507                                 }
508                         }
509                 }
510                 break;
511         case 9: // colormapped, RLE
512         case 11: // greyscale, RLE
513                 for (y = 0;y < image_height;y++, pixbuf += row_inc)
514                 {
515                         for (x = 0;x < image_width;)
516                         {
517                                 if (fin >= enddata)
518                                         break; // error - truncated file
519                                 runlen = *fin++;
520                                 if (runlen & 0x80)
521                                 {
522                                         // RLE - all pixels the same color
523                                         runlen += 1 - 0x80;
524                                         if (fin + pix_inc > enddata)
525                                                 break; // error - truncated file
526                                         if (x + runlen > image_width)
527                                                 break; // error - line exceeds width
528                                         p = palette + *fin++ * 4;
529                                         red = p[0];
530                                         green = p[1];
531                                         blue = p[2];
532                                         alpha = p[3];
533                                         for (;runlen--;x++)
534                                         {
535                                                 *pixbuf++ = red;
536                                                 *pixbuf++ = green;
537                                                 *pixbuf++ = blue;
538                                                 *pixbuf++ = alpha;
539                                         }
540                                 }
541                                 else
542                                 {
543                                         // uncompressed - all pixels different color
544                                         runlen++;
545                                         if (fin + pix_inc * runlen > enddata)
546                                                 break; // error - truncated file
547                                         if (x + runlen > image_width)
548                                                 break; // error - line exceeds width
549                                         for (;runlen--;x++)
550                                         {
551                                                 p = palette + *fin++ * 4;
552                                                 *pixbuf++ = p[0];
553                                                 *pixbuf++ = p[1];
554                                                 *pixbuf++ = p[2];
555                                                 *pixbuf++ = p[3];
556                                         }
557                                 }
558                         }
559                 }
560                 break;
561         case 10:
562                 // BGR or BGRA, RLE
563                 if (targa_header.pixel_size == 32 && alphabits)
564                 {
565                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
566                         {
567                                 for (x = 0;x < image_width;)
568                                 {
569                                         if (fin >= enddata)
570                                                 break; // error - truncated file
571                                         runlen = *fin++;
572                                         if (runlen & 0x80)
573                                         {
574                                                 // RLE - all pixels the same color
575                                                 runlen += 1 - 0x80;
576                                                 if (fin + pix_inc > enddata)
577                                                         break; // error - truncated file
578                                                 if (x + runlen > image_width)
579                                                         break; // error - line exceeds width
580                                                 red = fin[2];
581                                                 green = fin[1];
582                                                 blue = fin[0];
583                                                 alpha = fin[3];
584                                                 fin += pix_inc;
585                                                 for (;runlen--;x++)
586                                                 {
587                                                         *pixbuf++ = red;
588                                                         *pixbuf++ = green;
589                                                         *pixbuf++ = blue;
590                                                         *pixbuf++ = alpha;
591                                                 }
592                                         }
593                                         else
594                                         {
595                                                 // uncompressed - all pixels different color
596                                                 runlen++;
597                                                 if (fin + pix_inc * runlen > enddata)
598                                                         break; // error - truncated file
599                                                 if (x + runlen > image_width)
600                                                         break; // error - line exceeds width
601                                                 for (;runlen--;x++, fin += pix_inc)
602                                                 {
603                                                         *pixbuf++ = fin[2];
604                                                         *pixbuf++ = fin[1];
605                                                         *pixbuf++ = fin[0];
606                                                         *pixbuf++ = fin[3];
607                                                 }
608                                         }
609                                 }
610                         }
611                 }
612                 else
613                 {
614                         for (y = 0;y < image_height;y++, pixbuf += row_inc)
615                         {
616                                 for (x = 0;x < image_width;)
617                                 {
618                                         if (fin >= enddata)
619                                                 break; // error - truncated file
620                                         runlen = *fin++;
621                                         if (runlen & 0x80)
622                                         {
623                                                 // RLE - all pixels the same color
624                                                 runlen += 1 - 0x80;
625                                                 if (fin + pix_inc > enddata)
626                                                         break; // error - truncated file
627                                                 if (x + runlen > image_width)
628                                                         break; // error - line exceeds width
629                                                 red = fin[2];
630                                                 green = fin[1];
631                                                 blue = fin[0];
632                                                 alpha = 255;
633                                                 fin += pix_inc;
634                                                 for (;runlen--;x++)
635                                                 {
636                                                         *pixbuf++ = red;
637                                                         *pixbuf++ = green;
638                                                         *pixbuf++ = blue;
639                                                         *pixbuf++ = alpha;
640                                                 }
641                                         }
642                                         else
643                                         {
644                                                 // uncompressed - all pixels different color
645                                                 runlen++;
646                                                 if (fin + pix_inc * runlen > enddata)
647                                                         break; // error - truncated file
648                                                 if (x + runlen > image_width)
649                                                         break; // error - line exceeds width
650                                                 for (;runlen--;x++, fin += pix_inc)
651                                                 {
652                                                         *pixbuf++ = fin[2];
653                                                         *pixbuf++ = fin[1];
654                                                         *pixbuf++ = fin[0];
655                                                         *pixbuf++ = 255;
656                                                 }
657                                         }
658                                 }
659                         }
660                 }
661                 break;
662         default:
663                 // unknown image_type
664                 break;
665         }
666
667         return image_rgba;
668 }
669
670 /*
671 ============
672 LoadLMP
673 ============
674 */
675 unsigned char *LoadLMP (const unsigned char *f, int filesize, int matchwidth, int matchheight, qboolean loadAs8Bit)
676 {
677         unsigned char *image_buffer;
678
679         if (filesize < 9)
680         {
681                 Con_Print("LoadLMP: invalid LMP file\n");
682                 return NULL;
683         }
684
685         // parse the very complicated header *chuckle*
686         image_width = BuffLittleLong(f);
687         image_height = BuffLittleLong(f + 4);
688         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
689         {
690                 Con_Printf("LoadLMP: invalid size %ix%i\n", image_width, image_height);
691                 return NULL;
692         }
693         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
694                 return NULL;
695
696         if (filesize < (8 + image_width * image_height))
697         {
698                 Con_Print("LoadLMP: invalid LMP file\n");
699                 return NULL;
700         }
701
702         if (loadAs8Bit)
703         {
704                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height);
705                 memcpy(image_buffer, f + 8, image_width * image_height);
706         }
707         else
708         {
709                 image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
710                 Image_Copy8bitRGBA(f + 8, image_buffer, image_width * image_height, palette_transparent);
711         }
712         return image_buffer;
713 }
714
715
716 typedef struct q2wal_s
717 {
718         char            name[32];
719         unsigned        width, height;
720         unsigned        offsets[MIPLEVELS];             // four mip maps stored
721         char            animname[32];                   // next frame in animation chain
722         int                     flags;
723         int                     contents;
724         int                     value;
725 } q2wal_t;
726
727 unsigned char *LoadWAL (const unsigned char *f, int filesize, int matchwidth, int matchheight)
728 {
729         unsigned char *image_rgba;
730         const q2wal_t *inwal = (const q2wal_t *)f;
731
732         if (filesize < (int) sizeof(q2wal_t))
733         {
734                 Con_Print("LoadWAL: invalid WAL file\n");
735                 return NULL;
736         }
737
738         image_width = LittleLong(inwal->width);
739         image_height = LittleLong(inwal->height);
740         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
741         {
742                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
743                 return NULL;
744         }
745         if ((matchwidth && image_width != matchwidth) || (matchheight && image_height != matchheight))
746                 return NULL;
747
748         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
749         {
750                 Con_Print("LoadWAL: invalid WAL file\n");
751                 return NULL;
752         }
753
754         image_rgba = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
755         if (!image_rgba)
756         {
757                 Con_Printf("LoadLMP: not enough memory for %i by %i image\n", image_width, image_height);
758                 return NULL;
759         }
760         Image_Copy8bitRGBA(f + LittleLong(inwal->offsets[0]), image_rgba, image_width * image_height, palette_complete);
761         return image_rgba;
762 }
763
764
765 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
766 {
767         const char *ext;
768
769         if (size_out == 0)
770                 return;
771
772         ext = FS_FileExtension(in);
773         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
774                 FS_StripExtension(in, out, size_out);
775         else
776                 strlcpy(out, in, size_out);
777 }
778
779 typedef struct imageformat_s
780 {
781         const char *formatstring;
782         unsigned char *(*loadfunc)(const unsigned char *f, int filesize, int matchwidth, int matchheight);
783 }
784 imageformat_t;
785
786 // GAME_TENEBRAE only
787 imageformat_t imageformats_tenebrae[] =
788 {
789         {"override/%s.tga", LoadTGA},
790         {"override/%s.png", PNG_LoadImage},
791         {"override/%s.jpg", JPEG_LoadImage},
792         {"override/%s.pcx", LoadPCX},
793         {NULL, NULL}
794 };
795
796 imageformat_t imageformats_nopath[] =
797 {
798         {"override/%s.tga", LoadTGA},
799         {"override/%s.png", PNG_LoadImage},
800         {"override/%s.jpg", JPEG_LoadImage},
801         {"textures/%s.tga", LoadTGA},
802         {"textures/%s.png", PNG_LoadImage},
803         {"textures/%s.jpg", JPEG_LoadImage},
804         {"%s.tga", LoadTGA},
805         {"%s.png", PNG_LoadImage},
806         {"%s.jpg", JPEG_LoadImage},
807         {"%s.pcx", LoadPCX},
808         {NULL, NULL}
809 };
810
811 imageformat_t imageformats_textures[] =
812 {
813         {"%s.tga", LoadTGA},
814         {"%s.png", PNG_LoadImage},
815         {"%s.jpg", JPEG_LoadImage},
816         {"%s.pcx", LoadPCX},
817         {"%s.wal", LoadWAL},
818         {NULL, NULL}
819 };
820
821 imageformat_t imageformats_gfx[] =
822 {
823         {"%s.tga", LoadTGA},
824         {"%s.png", PNG_LoadImage},
825         {"%s.jpg", JPEG_LoadImage},
826         {"%s.pcx", LoadPCX},
827         {NULL, NULL}
828 };
829
830 imageformat_t imageformats_other[] =
831 {
832         {"%s.tga", LoadTGA},
833         {"%s.png", PNG_LoadImage},
834         {"%s.jpg", JPEG_LoadImage},
835         {"%s.pcx", LoadPCX},
836         {NULL, NULL}
837 };
838
839 unsigned char *loadimagepixels (const char *filename, qboolean complain, int matchwidth, int matchheight)
840 {
841         fs_offset_t filesize;
842         imageformat_t *firstformat, *format;
843         unsigned char *f, *data = NULL;
844         char basename[MAX_QPATH], name[MAX_QPATH], *c;
845         if (developer_memorydebug.integer)
846                 Mem_CheckSentinelsGlobal();
847         if (developer_texturelogging.integer)
848                 Log_Printf("textures.log", "%s\n", filename);
849         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
850         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
851         for (c = basename;*c;c++)
852                 if (*c == '*')
853                         *c = '#';
854         name[0] = 0;
855         if (strchr(basename, '/'))
856         {
857                 int i;
858                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
859                         name[i] = basename[i];
860                 name[i] = 0;
861         }
862         if (gamemode == GAME_TENEBRAE)
863                 firstformat = imageformats_tenebrae;
864         else if (!strcasecmp(name, "textures"))
865                 firstformat = imageformats_textures;
866         else if (!strcasecmp(name, "gfx"))
867                 firstformat = imageformats_gfx;
868         else if (!strchr(basename, '/'))
869                 firstformat = imageformats_nopath;
870         else
871                 firstformat = imageformats_other;
872         // now try all the formats in the selected list
873         for (format = firstformat;format->formatstring;format++)
874         {
875                 sprintf (name, format->formatstring, basename);
876                 f = FS_LoadFile(name, tempmempool, true, &filesize);
877                 if (f)
878                 {
879                         data = format->loadfunc(f, filesize, matchwidth, matchheight);
880                         Mem_Free(f);
881                         if (data)
882                         {
883                                 if (developer.integer >= 10)
884                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
885                                 if (developer_memorydebug.integer)
886                                         Mem_CheckSentinelsGlobal();
887                                 return data;
888                         }
889                         else
890                         {
891                                 if (developer.integer >= 1)
892                                         Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
893                         }
894                 }
895         }
896         if (complain)
897         {
898                 Con_Printf("Couldn't load %s using ", filename);
899                 for (format = firstformat;format->formatstring;format++)
900                 {
901                         sprintf (name, format->formatstring, basename);
902                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
903                 }
904         }
905         if (developer_memorydebug.integer)
906                 Mem_CheckSentinelsGlobal();
907         return NULL;
908 }
909
910 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, int matchwidth, int matchheight, qboolean complain, int flags)
911 {
912         unsigned char *data;
913         rtexture_t *rt;
914         if (!(data = loadimagepixels (filename, complain, matchwidth, matchheight)))
915                 return 0;
916         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_RGBA, flags, NULL);
917         Mem_Free(data);
918         return rt;
919 }
920
921 int fixtransparentpixels(unsigned char *data, int w, int h)
922 {
923         int const FIXTRANS_NEEDED = 1;
924         int const FIXTRANS_HAS_L = 2;
925         int const FIXTRANS_HAS_R = 4;
926         int const FIXTRANS_HAS_U = 8;
927         int const FIXTRANS_HAS_D = 16;
928         int const FIXTRANS_FIXED = 32;
929         unsigned char *fixMask = Mem_Alloc(tempmempool, w * h);
930         int fixPixels = 0;
931         int changedPixels = 0;
932         int x, y;
933
934 #define FIXTRANS_PIXEL (y*w+x)
935 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
936 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
937 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
938 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
939
940         memset(fixMask, 0, w * h);
941         for(y = 0; y < h; ++y)
942                 for(x = 0; x < w; ++x)
943                 {
944                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
945                         {
946                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
947                                 ++fixPixels;
948                         }
949                         else
950                         {
951                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
952                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
953                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
954                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
955                         }
956                 }
957         if(fixPixels == w * h)
958                 return 0; // sorry, can't do anything about this
959         while(fixPixels)
960         {
961                 for(y = 0; y < h; ++y)
962                         for(x = 0; x < w; ++x)
963                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
964                                 {
965                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
966                                         unsigned char r, g, b, a, r0, g0, b0;
967                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
968                                         {
969                                                 r = data[FIXTRANS_PIXEL_U * 4 + 0];
970                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
971                                                 b = data[FIXTRANS_PIXEL_U * 4 + 2];
972                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
973                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
974                                         }
975                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
976                                         {
977                                                 r = data[FIXTRANS_PIXEL_D * 4 + 0];
978                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
979                                                 b = data[FIXTRANS_PIXEL_D * 4 + 2];
980                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
981                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
982                                         }
983                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
984                                         {
985                                                 r = data[FIXTRANS_PIXEL_L * 4 + 0];
986                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
987                                                 b = data[FIXTRANS_PIXEL_L * 4 + 2];
988                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
989                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
990                                         }
991                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
992                                         {
993                                                 r = data[FIXTRANS_PIXEL_R * 4 + 0];
994                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
995                                                 b = data[FIXTRANS_PIXEL_R * 4 + 2];
996                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
997                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
998                                         }
999                                         if(!cnt)
1000                                                 continue;
1001                                         r0 = data[FIXTRANS_PIXEL * 4 + 0];
1002                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
1003                                         b0 = data[FIXTRANS_PIXEL * 4 + 2];
1004                                         if(sumA)
1005                                         {
1006                                                 // there is a surrounding non-alpha pixel
1007                                                 r = (sumRA + sumA / 2) / sumA;
1008                                                 g = (sumGA + sumA / 2) / sumA;
1009                                                 b = (sumBA + sumA / 2) / sumA;
1010                                         }
1011                                         else
1012                                         {
1013                                                 // need to use a "regular" average
1014                                                 r = (sumR + cnt / 2) / cnt;
1015                                                 g = (sumG + cnt / 2) / cnt;
1016                                                 b = (sumB + cnt / 2) / cnt;
1017                                         }
1018                                         if(r != r0 || g != g0 || b != b0)
1019                                                 ++changedPixels;
1020                                         data[FIXTRANS_PIXEL * 4 + 0] = r;
1021                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
1022                                         data[FIXTRANS_PIXEL * 4 + 2] = b;
1023                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
1024                                 }
1025                 for(y = 0; y < h; ++y)
1026                         for(x = 0; x < w; ++x)
1027                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
1028                                 {
1029                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
1030                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
1031                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
1032                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
1033                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
1034                                         --fixPixels;
1035                                 }
1036         }
1037         return changedPixels;
1038 }
1039
1040 void Image_FixTransparentPixels_f(void)
1041 {
1042         const char *filename, *filename_pattern;
1043         fssearch_t *search;
1044         int i, n;
1045         char outfilename[MAX_QPATH], buf[MAX_QPATH];
1046         unsigned char *data;
1047         if(Cmd_Argc() != 2)
1048         {
1049                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
1050                 return;
1051         }
1052         filename_pattern = Cmd_Argv(1);
1053         search = FS_Search(filename_pattern, true, true);
1054         if(!search)
1055                 return;
1056         for(i = 0; i < search->numfilenames; ++i)
1057         {
1058                 filename = search->filenames[i];
1059                 Con_Printf("Processing %s... ", filename);
1060                 Image_StripImageExtension(filename, buf, sizeof(buf));
1061                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1062                 if(!(data = loadimagepixels(filename, true, 0, 0)))
1063                         return;
1064                 if((n = fixtransparentpixels(data, image_width, image_height)))
1065                 {
1066                         Image_WriteTGARGBA(outfilename, image_width, image_height, data);
1067                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1068                 }
1069                 else
1070                         Con_Printf("unchanged.\n");
1071                 Mem_Free(data);
1072         }
1073 }
1074
1075 qboolean Image_WriteTGARGB_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
1076 {
1077         qboolean ret;
1078         unsigned char *out;
1079         const unsigned char *in, *end;
1080
1081         memset (buffer, 0, 18);
1082         buffer[2] = 2;          // uncompressed type
1083         buffer[12] = (width >> 0) & 0xFF;
1084         buffer[13] = (width >> 8) & 0xFF;
1085         buffer[14] = (height >> 0) & 0xFF;
1086         buffer[15] = (height >> 8) & 0xFF;
1087         buffer[16] = 24;        // pixel size
1088
1089         // swap rgb to bgr
1090         in = data;
1091         out = buffer + 18;
1092         end = in + width*height*3;
1093         for (;in < end;in += 3)
1094         {
1095                 *out++ = in[2];
1096                 *out++ = in[1];
1097                 *out++ = in[0];
1098         }
1099         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
1100
1101         return ret;
1102 }
1103
1104 void Image_WriteTGARGBA (const char *filename, int width, int height, const unsigned char *data)
1105 {
1106         int y;
1107         unsigned char *buffer, *out;
1108         const unsigned char *in, *end;
1109
1110         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1111
1112         memset (buffer, 0, 18);
1113         buffer[2] = 2;          // uncompressed type
1114         buffer[12] = (width >> 0) & 0xFF;
1115         buffer[13] = (width >> 8) & 0xFF;
1116         buffer[14] = (height >> 0) & 0xFF;
1117         buffer[15] = (height >> 8) & 0xFF;
1118
1119         for (y = 3;y < width*height*4;y += 4)
1120                 if (data[y] < 255)
1121                         break;
1122
1123         if (y < width*height*4)
1124         {
1125                 // save the alpha channel
1126                 buffer[16] = 32;        // pixel size
1127                 buffer[17] = 8; // 8 bits of alpha
1128
1129                 // swap rgba to bgra and flip upside down
1130                 out = buffer + 18;
1131                 for (y = height - 1;y >= 0;y--)
1132                 {
1133                         in = data + y * width * 4;
1134                         end = in + width * 4;
1135                         for (;in < end;in += 4)
1136                         {
1137                                 *out++ = in[2];
1138                                 *out++ = in[1];
1139                                 *out++ = in[0];
1140                                 *out++ = in[3];
1141                         }
1142                 }
1143                 FS_WriteFile (filename, buffer, width*height*4 + 18 );
1144         }
1145         else
1146         {
1147                 // save only the color channels
1148                 buffer[16] = 24;        // pixel size
1149                 buffer[17] = 0; // 8 bits of alpha
1150
1151                 // swap rgba to bgr and flip upside down
1152                 out = buffer + 18;
1153                 for (y = height - 1;y >= 0;y--)
1154                 {
1155                         in = data + y * width * 4;
1156                         end = in + width * 4;
1157                         for (;in < end;in += 4)
1158                         {
1159                                 *out++ = in[2];
1160                                 *out++ = in[1];
1161                                 *out++ = in[0];
1162                         }
1163                 }
1164                 FS_WriteFile (filename, buffer, width*height*3 + 18 );
1165         }
1166
1167         Mem_Free(buffer);
1168 }
1169
1170 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1171 {
1172         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1173         fstep = (int) (inwidth*65536.0f/outwidth);
1174         endx = (inwidth-1);
1175         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1176         {
1177                 xi = f >> 16;
1178                 if (xi != oldx)
1179                 {
1180                         in += (xi - oldx) * 4;
1181                         oldx = xi;
1182                 }
1183                 if (xi < endx)
1184                 {
1185                         lerp = f & 0xFFFF;
1186                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1187                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1188                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1189                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1190                 }
1191                 else // last pixel of the line has no pixel to lerp to
1192                 {
1193                         *out++ = in[0];
1194                         *out++ = in[1];
1195                         *out++ = in[2];
1196                         *out++ = in[3];
1197                 }
1198         }
1199 }
1200
1201 static void Image_Resample24LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1202 {
1203         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1204         fstep = (int) (inwidth*65536.0f/outwidth);
1205         endx = (inwidth-1);
1206         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1207         {
1208                 xi = f >> 16;
1209                 if (xi != oldx)
1210                 {
1211                         in += (xi - oldx) * 3;
1212                         oldx = xi;
1213                 }
1214                 if (xi < endx)
1215                 {
1216                         lerp = f & 0xFFFF;
1217                         *out++ = (unsigned char) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
1218                         *out++ = (unsigned char) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
1219                         *out++ = (unsigned char) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
1220                 }
1221                 else // last pixel of the line has no pixel to lerp to
1222                 {
1223                         *out++ = in[0];
1224                         *out++ = in[1];
1225                         *out++ = in[2];
1226                 }
1227         }
1228 }
1229
1230 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1231 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1232 {
1233         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1234         unsigned char *out;
1235         const unsigned char *inrow;
1236         unsigned char *resamplerow1;
1237         unsigned char *resamplerow2;
1238         out = (unsigned char *)outdata;
1239         fstep = (int) (inheight*65536.0f/outheight);
1240
1241         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1242         resamplerow2 = resamplerow1 + outwidth*4;
1243
1244         inrow = (const unsigned char *)indata;
1245         oldy = 0;
1246         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1247         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1248         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1249         {
1250                 yi = f >> 16;
1251                 if (yi < endy)
1252                 {
1253                         lerp = f & 0xFFFF;
1254                         if (yi != oldy)
1255                         {
1256                                 inrow = (unsigned char *)indata + inwidth4*yi;
1257                                 if (yi == oldy+1)
1258                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1259                                 else
1260                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1261                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1262                                 oldy = yi;
1263                         }
1264                         j = outwidth - 4;
1265                         while(j >= 0)
1266                         {
1267                                 LERPBYTE( 0);
1268                                 LERPBYTE( 1);
1269                                 LERPBYTE( 2);
1270                                 LERPBYTE( 3);
1271                                 LERPBYTE( 4);
1272                                 LERPBYTE( 5);
1273                                 LERPBYTE( 6);
1274                                 LERPBYTE( 7);
1275                                 LERPBYTE( 8);
1276                                 LERPBYTE( 9);
1277                                 LERPBYTE(10);
1278                                 LERPBYTE(11);
1279                                 LERPBYTE(12);
1280                                 LERPBYTE(13);
1281                                 LERPBYTE(14);
1282                                 LERPBYTE(15);
1283                                 out += 16;
1284                                 resamplerow1 += 16;
1285                                 resamplerow2 += 16;
1286                                 j -= 4;
1287                         }
1288                         if (j & 2)
1289                         {
1290                                 LERPBYTE( 0);
1291                                 LERPBYTE( 1);
1292                                 LERPBYTE( 2);
1293                                 LERPBYTE( 3);
1294                                 LERPBYTE( 4);
1295                                 LERPBYTE( 5);
1296                                 LERPBYTE( 6);
1297                                 LERPBYTE( 7);
1298                                 out += 8;
1299                                 resamplerow1 += 8;
1300                                 resamplerow2 += 8;
1301                         }
1302                         if (j & 1)
1303                         {
1304                                 LERPBYTE( 0);
1305                                 LERPBYTE( 1);
1306                                 LERPBYTE( 2);
1307                                 LERPBYTE( 3);
1308                                 out += 4;
1309                                 resamplerow1 += 4;
1310                                 resamplerow2 += 4;
1311                         }
1312                         resamplerow1 -= outwidth4;
1313                         resamplerow2 -= outwidth4;
1314                 }
1315                 else
1316                 {
1317                         if (yi != oldy)
1318                         {
1319                                 inrow = (unsigned char *)indata + inwidth4*yi;
1320                                 if (yi == oldy+1)
1321                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1322                                 else
1323                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1324                                 oldy = yi;
1325                         }
1326                         memcpy(out, resamplerow1, outwidth4);
1327                 }
1328         }
1329
1330         Mem_Free(resamplerow1);
1331         resamplerow1 = NULL;
1332         resamplerow2 = NULL;
1333 }
1334
1335 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1336 {
1337         int i, j;
1338         unsigned frac, fracstep;
1339         // relies on int being 4 bytes
1340         int *inrow, *out;
1341         out = (int *)outdata;
1342
1343         fracstep = inwidth*0x10000/outwidth;
1344         for (i = 0;i < outheight;i++)
1345         {
1346                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1347                 frac = fracstep >> 1;
1348                 j = outwidth - 4;
1349                 while (j >= 0)
1350                 {
1351                         out[0] = inrow[frac >> 16];frac += fracstep;
1352                         out[1] = inrow[frac >> 16];frac += fracstep;
1353                         out[2] = inrow[frac >> 16];frac += fracstep;
1354                         out[3] = inrow[frac >> 16];frac += fracstep;
1355                         out += 4;
1356                         j -= 4;
1357                 }
1358                 if (j & 2)
1359                 {
1360                         out[0] = inrow[frac >> 16];frac += fracstep;
1361                         out[1] = inrow[frac >> 16];frac += fracstep;
1362                         out += 2;
1363                 }
1364                 if (j & 1)
1365                 {
1366                         out[0] = inrow[frac >> 16];frac += fracstep;
1367                         out += 1;
1368                 }
1369         }
1370 }
1371
1372 void Image_Resample24Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1373 {
1374         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
1375         unsigned char *out;
1376         const unsigned char *inrow;
1377         unsigned char *resamplerow1;
1378         unsigned char *resamplerow2;
1379         out = (unsigned char *)outdata;
1380         fstep = (int) (inheight*65536.0f/outheight);
1381
1382         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*3*2);
1383         resamplerow2 = resamplerow1 + outwidth*3;
1384
1385         inrow = (const unsigned char *)indata;
1386         oldy = 0;
1387         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1388         Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1389         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1390         {
1391                 yi = f >> 16;
1392                 if (yi < endy)
1393                 {
1394                         lerp = f & 0xFFFF;
1395                         if (yi != oldy)
1396                         {
1397                                 inrow = (unsigned char *)indata + inwidth3*yi;
1398                                 if (yi == oldy+1)
1399                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1400                                 else
1401                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1402                                 Image_Resample24LerpLine (inrow + inwidth3, resamplerow2, inwidth, outwidth);
1403                                 oldy = yi;
1404                         }
1405                         j = outwidth - 4;
1406                         while(j >= 0)
1407                         {
1408                                 LERPBYTE( 0);
1409                                 LERPBYTE( 1);
1410                                 LERPBYTE( 2);
1411                                 LERPBYTE( 3);
1412                                 LERPBYTE( 4);
1413                                 LERPBYTE( 5);
1414                                 LERPBYTE( 6);
1415                                 LERPBYTE( 7);
1416                                 LERPBYTE( 8);
1417                                 LERPBYTE( 9);
1418                                 LERPBYTE(10);
1419                                 LERPBYTE(11);
1420                                 out += 12;
1421                                 resamplerow1 += 12;
1422                                 resamplerow2 += 12;
1423                                 j -= 4;
1424                         }
1425                         if (j & 2)
1426                         {
1427                                 LERPBYTE( 0);
1428                                 LERPBYTE( 1);
1429                                 LERPBYTE( 2);
1430                                 LERPBYTE( 3);
1431                                 LERPBYTE( 4);
1432                                 LERPBYTE( 5);
1433                                 out += 6;
1434                                 resamplerow1 += 6;
1435                                 resamplerow2 += 6;
1436                         }
1437                         if (j & 1)
1438                         {
1439                                 LERPBYTE( 0);
1440                                 LERPBYTE( 1);
1441                                 LERPBYTE( 2);
1442                                 out += 3;
1443                                 resamplerow1 += 3;
1444                                 resamplerow2 += 3;
1445                         }
1446                         resamplerow1 -= outwidth3;
1447                         resamplerow2 -= outwidth3;
1448                 }
1449                 else
1450                 {
1451                         if (yi != oldy)
1452                         {
1453                                 inrow = (unsigned char *)indata + inwidth3*yi;
1454                                 if (yi == oldy+1)
1455                                         memcpy(resamplerow1, resamplerow2, outwidth3);
1456                                 else
1457                                         Image_Resample24LerpLine (inrow, resamplerow1, inwidth, outwidth);
1458                                 oldy = yi;
1459                         }
1460                         memcpy(out, resamplerow1, outwidth3);
1461                 }
1462         }
1463         Mem_Free(resamplerow1);
1464         resamplerow1 = NULL;
1465         resamplerow2 = NULL;
1466 }
1467
1468 void Image_Resample24Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1469 {
1470         int i, j, f, inwidth3 = inwidth * 3;
1471         unsigned frac, fracstep;
1472         unsigned char *inrow, *out;
1473         out = (unsigned char *)outdata;
1474
1475         fracstep = inwidth*0x10000/outwidth;
1476         for (i = 0;i < outheight;i++)
1477         {
1478                 inrow = (unsigned char *)indata + inwidth3*(i*inheight/outheight);
1479                 frac = fracstep >> 1;
1480                 j = outwidth - 4;
1481                 while (j >= 0)
1482                 {
1483                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1484                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1485                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1486                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1487                         j -= 4;
1488                 }
1489                 if (j & 2)
1490                 {
1491                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1492                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1493                         out += 2;
1494                 }
1495                 if (j & 1)
1496                 {
1497                         f = (frac >> 16)*3;*out++ = inrow[f+0];*out++ = inrow[f+1];*out++ = inrow[f+2];frac += fracstep;
1498                         out += 1;
1499                 }
1500         }
1501 }
1502
1503 /*
1504 ================
1505 Image_Resample
1506 ================
1507 */
1508 void Image_Resample (const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int bytesperpixel, int quality)
1509 {
1510         if (indepth != 1 || outdepth != 1)
1511         {
1512                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1513                 return;
1514         }
1515         if (bytesperpixel == 4)
1516         {
1517                 if (quality)
1518                         Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1519                 else
1520                         Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1521         }
1522         else if (bytesperpixel == 3)
1523         {
1524                 if (quality)
1525                         Image_Resample24Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1526                 else
1527                         Image_Resample24Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1528         }
1529         else
1530                 Con_Printf ("Image_Resample: unsupported bytesperpixel %i\n", bytesperpixel);
1531 }
1532
1533 // in can be the same as out
1534 void Image_MipReduce(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth, int bytesperpixel)
1535 {
1536         const unsigned char *inrow;
1537         int x, y, nextrow;
1538         if (*depth != 1 || destdepth != 1)
1539         {
1540                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1541                 if (*width > destwidth)
1542                         *width >>= 1;
1543                 if (*height > destheight)
1544                         *height >>= 1;
1545                 if (*depth > destdepth)
1546                         *depth >>= 1;
1547                 return;
1548         }
1549         // note: if given odd width/height this discards the last row/column of
1550         // pixels, rather than doing a proper box-filter scale down
1551         inrow = in;
1552         nextrow = *width * bytesperpixel;
1553         if (*width > destwidth)
1554         {
1555                 *width >>= 1;
1556                 if (*height > destheight)
1557                 {
1558                         // reduce both
1559                         *height >>= 1;
1560                         if (bytesperpixel == 4)
1561                         {
1562                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1563                                 {
1564                                         for (in = inrow, x = 0;x < *width;x++)
1565                                         {
1566                                                 out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1567                                                 out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1568                                                 out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1569                                                 out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1570                                                 out += 4;
1571                                                 in += 8;
1572                                         }
1573                                 }
1574                         }
1575                         else if (bytesperpixel == 3)
1576                         {
1577                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1578                                 {
1579                                         for (in = inrow, x = 0;x < *width;x++)
1580                                         {
1581                                                 out[0] = (unsigned char) ((in[0] + in[3] + in[nextrow  ] + in[nextrow+3]) >> 2);
1582                                                 out[1] = (unsigned char) ((in[1] + in[4] + in[nextrow+1] + in[nextrow+4]) >> 2);
1583                                                 out[2] = (unsigned char) ((in[2] + in[5] + in[nextrow+2] + in[nextrow+5]) >> 2);
1584                                                 out += 3;
1585                                                 in += 6;
1586                                         }
1587                                 }
1588                         }
1589                         else
1590                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1591                 }
1592                 else
1593                 {
1594                         // reduce width
1595                         if (bytesperpixel == 4)
1596                         {
1597                                 for (y = 0;y < *height;y++, inrow += nextrow)
1598                                 {
1599                                         for (in = inrow, x = 0;x < *width;x++)
1600                                         {
1601                                                 out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1602                                                 out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1603                                                 out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1604                                                 out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1605                                                 out += 4;
1606                                                 in += 8;
1607                                         }
1608                                 }
1609                         }
1610                         else if (bytesperpixel == 3)
1611                         {
1612                                 for (y = 0;y < *height;y++, inrow += nextrow)
1613                                 {
1614                                         for (in = inrow, x = 0;x < *width;x++)
1615                                         {
1616                                                 out[0] = (unsigned char) ((in[0] + in[3]) >> 1);
1617                                                 out[1] = (unsigned char) ((in[1] + in[4]) >> 1);
1618                                                 out[2] = (unsigned char) ((in[2] + in[5]) >> 1);
1619                                                 out += 3;
1620                                                 in += 6;
1621                                         }
1622                                 }
1623                         }
1624                         else
1625                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1626                 }
1627         }
1628         else
1629         {
1630                 if (*height > destheight)
1631                 {
1632                         // reduce height
1633                         *height >>= 1;
1634                         if (bytesperpixel == 4)
1635                         {
1636                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1637                                 {
1638                                         for (in = inrow, x = 0;x < *width;x++)
1639                                         {
1640                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1641                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1642                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1643                                                 out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1644                                                 out += 4;
1645                                                 in += 4;
1646                                         }
1647                                 }
1648                         }
1649                         else if (bytesperpixel == 3)
1650                         {
1651                                 for (y = 0;y < *height;y++, inrow += nextrow * 2)
1652                                 {
1653                                         for (in = inrow, x = 0;x < *width;x++)
1654                                         {
1655                                                 out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1656                                                 out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1657                                                 out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1658                                                 out += 3;
1659                                                 in += 3;
1660                                         }
1661                                 }
1662                         }
1663                         else
1664                                 Con_Printf ("Image_MipReduce: unsupported bytesperpixel %i\n", bytesperpixel);
1665                 }
1666                 else
1667                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1668         }
1669 }
1670
1671 void Image_HeightmapToNormalmap(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1672 {
1673         int x, y, x1, x2, y1, y2;
1674         const unsigned char *b, *row[3];
1675         int p[5];
1676         unsigned char *out;
1677         float iwidth, iheight, ibumpscale, n[3];
1678         iwidth = 1.0f / width;
1679         iheight = 1.0f / height;
1680         ibumpscale = (255.0f * 6.0f) / bumpscale;
1681         out = outpixels;
1682         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1683         {
1684                 y2 = y + 1;if (y2 >= height) y2 = 0;
1685                 row[0] = inpixels + (y1 * width) * 4;
1686                 row[1] = inpixels + (y  * width) * 4;
1687                 row[2] = inpixels + (y2 * width) * 4;
1688                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1689                 {
1690                         x2 = x + 1;if (x2 >= width) x2 = 0;
1691                         // left, right
1692                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1693                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1694                         // above, below
1695                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1696                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1697                         // center
1698                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1699                         // calculate a normal from the slopes
1700                         n[0] = p[0] - p[1];
1701                         n[1] = p[3] - p[2];
1702                         n[2] = ibumpscale;
1703                         VectorNormalize(n);
1704                         // turn it into a dot3 rgb vector texture
1705                         out[0] = (int)(128.0f + n[0] * 127.0f);
1706                         out[1] = (int)(128.0f + n[1] * 127.0f);
1707                         out[2] = (int)(128.0f + n[2] * 127.0f);
1708                         out[3] = (p[4]) / 3;
1709                         out += 4;
1710                 }
1711         }
1712 }