fix a mistake in the recent commit
[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_Copy8bitBGRA(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_BGRA (const unsigned char *f, int filesize)
185 {
186         pcx_t pcx;
187         unsigned char *a, *b, *image_buffer, *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
220         palette = f + filesize - 768;
221
222         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width*image_height*4);
223         if (!image_buffer)
224         {
225                 Con_Printf("LoadPCX: not enough memory for %i by %i image\n", image_width, image_height);
226                 return NULL;
227         }
228         pbuf = image_buffer + image_width*image_height*3;
229         enddata = palette;
230
231         for (y = 0;y < image_height && fin < enddata;y++)
232         {
233                 a = pbuf + y * image_width;
234                 for (x = 0;x < image_width && fin < enddata;)
235                 {
236                         dataByte = *fin++;
237                         if(dataByte >= 0xC0)
238                         {
239                                 if (fin >= enddata)
240                                         break;
241                                 x2 = x + (dataByte & 0x3F);
242                                 dataByte = *fin++;
243                                 if (x2 > image_width)
244                                         x2 = image_width; // technically an error
245                                 while(x < x2)
246                                         a[x++] = dataByte;
247                         }
248                         else
249                                 a[x++] = dataByte;
250                 }
251                 fin += pcx.bytes_per_line - image_width; // the number of bytes per line is always forced to an even number
252                 while(x < image_width)
253                         a[x++] = 0;
254         }
255
256         a = image_buffer;
257         b = pbuf;
258
259         for(x = 0;x < image_width*image_height;x++)
260         {
261                 y = *b++ * 3;
262                 *a++ = palette[y+2];
263                 *a++ = palette[y+1];
264                 *a++ = palette[y];
265                 *a++ = 255;
266         }
267
268         return image_buffer;
269 }
270
271 /*
272 =========================================================
273
274 TARGA LOADING
275
276 =========================================================
277 */
278
279 typedef struct _TargaHeader
280 {
281         unsigned char   id_length, colormap_type, image_type;
282         unsigned short  colormap_index, colormap_length;
283         unsigned char   colormap_size;
284         unsigned short  x_origin, y_origin, width, height;
285         unsigned char   pixel_size, attributes;
286 }
287 TargaHeader;
288
289 void PrintTargaHeader(TargaHeader *t)
290 {
291         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);
292 }
293
294 /*
295 =============
296 LoadTGA
297 =============
298 */
299 unsigned char *LoadTGA_BGRA (const unsigned char *f, int filesize)
300 {
301         int x, y, pix_inc, row_inci, runlen, alphabits;
302         unsigned char *image_buffer;
303         unsigned int *pixbufi;
304         const unsigned char *fin, *enddata;
305         TargaHeader targa_header;
306         unsigned int palettei[256];
307         union
308         {
309                 unsigned int i;
310                 unsigned char b[4];
311         }
312         bgra;
313
314         if (filesize < 19)
315                 return NULL;
316
317         enddata = f + filesize;
318
319         targa_header.id_length = f[0];
320         targa_header.colormap_type = f[1];
321         targa_header.image_type = f[2];
322
323         targa_header.colormap_index = f[3] + f[4] * 256;
324         targa_header.colormap_length = f[5] + f[6] * 256;
325         targa_header.colormap_size = f[7];
326         targa_header.x_origin = f[8] + f[9] * 256;
327         targa_header.y_origin = f[10] + f[11] * 256;
328         targa_header.width = image_width = f[12] + f[13] * 256;
329         targa_header.height = image_height = f[14] + f[15] * 256;
330         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
331         {
332                 Con_Print("LoadTGA: invalid size\n");
333                 PrintTargaHeader(&targa_header);
334                 return NULL;
335         }
336         targa_header.pixel_size = f[16];
337         targa_header.attributes = f[17];
338
339         // advance to end of header
340         fin = f + 18;
341
342         // skip TARGA image comment (usually 0 bytes)
343         fin += targa_header.id_length;
344
345         // read/skip the colormap if present (note: according to the TARGA spec it
346         // can be present even on truecolor or greyscale images, just not used by
347         // the image data)
348         if (targa_header.colormap_type)
349         {
350                 if (targa_header.colormap_length > 256)
351                 {
352                         Con_Print("LoadTGA: only up to 256 colormap_length supported\n");
353                         PrintTargaHeader(&targa_header);
354                         return NULL;
355                 }
356                 if (targa_header.colormap_index)
357                 {
358                         Con_Print("LoadTGA: colormap_index not supported\n");
359                         PrintTargaHeader(&targa_header);
360                         return NULL;
361                 }
362                 if (targa_header.colormap_size == 24)
363                 {
364                         for (x = 0;x < targa_header.colormap_length;x++)
365                         {
366                                 bgra.b[0] = *fin++;
367                                 bgra.b[1] = *fin++;
368                                 bgra.b[2] = *fin++;
369                                 bgra.b[3] = 255;
370                                 palettei[x] = bgra.i;
371                         }
372                 }
373                 else if (targa_header.colormap_size == 32)
374                 {
375                         memcpy(palettei, fin, targa_header.colormap_length*4);
376                         fin += targa_header.colormap_length * 4;
377                 }
378                 else
379                 {
380                         Con_Print("LoadTGA: Only 32 and 24 bit colormap_size supported\n");
381                         PrintTargaHeader(&targa_header);
382                         return NULL;
383                 }
384         }
385
386         // check our pixel_size restrictions according to image_type
387         switch (targa_header.image_type & ~8)
388         {
389         case 2:
390                 if (targa_header.pixel_size != 24 && targa_header.pixel_size != 32)
391                 {
392                         Con_Print("LoadTGA: only 24bit and 32bit pixel sizes supported for type 2 and type 10 images\n");
393                         PrintTargaHeader(&targa_header);
394                         return NULL;
395                 }
396                 break;
397         case 3:
398                 // set up a palette to make the loader easier
399                 for (x = 0;x < 256;x++)
400                 {
401                         bgra.b[0] = bgra.b[1] = bgra.b[2] = x;
402                         bgra.b[3] = 255;
403                         palettei[x] = bgra.i;
404                 }
405                 // fall through to colormap case
406         case 1:
407                 if (targa_header.pixel_size != 8)
408                 {
409                         Con_Print("LoadTGA: only 8bit pixel size for type 1, 3, 9, and 11 images supported\n");
410                         PrintTargaHeader(&targa_header);
411                         return NULL;
412                 }
413                 break;
414         default:
415                 Con_Printf("LoadTGA: Only type 1, 2, 3, 9, 10, and 11 targa RGB images supported, image_type = %i\n", targa_header.image_type);
416                 PrintTargaHeader(&targa_header);
417                 return NULL;
418         }
419
420         if (targa_header.attributes & 0x10)
421         {
422                 Con_Print("LoadTGA: origin must be in top left or bottom left, top right and bottom right are not supported\n");
423                 return NULL;
424         }
425
426         // number of attribute bits per pixel, we only support 0 or 8
427         alphabits = targa_header.attributes & 0x0F;
428         if (alphabits != 8 && alphabits != 0)
429         {
430                 Con_Print("LoadTGA: only 0 or 8 attribute (alpha) bits supported\n");
431                 return NULL;
432         }
433
434         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
435         if (!image_buffer)
436         {
437                 Con_Printf("LoadTGA: not enough memory for %i by %i image\n", image_width, image_height);
438                 return NULL;
439         }
440
441         // If bit 5 of attributes isn't set, the image has been stored from bottom to top
442         if ((targa_header.attributes & 0x20) == 0)
443         {
444                 pixbufi = (unsigned int*)image_buffer + (image_height - 1)*image_width;
445                 row_inci = -image_width*2;
446         }
447         else
448         {
449                 pixbufi = (unsigned int*)image_buffer;
450                 row_inci = 0;
451         }
452
453         x = 0;
454         y = 0;
455         pix_inc = 1;
456         if ((targa_header.image_type & ~8) == 2)
457                 pix_inc = (targa_header.pixel_size + 7) / 8;
458         switch (targa_header.image_type)
459         {
460         case 1: // colormapped, uncompressed
461         case 3: // greyscale, uncompressed
462                 if (fin + image_width * image_height * pix_inc > enddata)
463                         break;
464                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
465                         for (x = 0;x < image_width;x++)
466                                 *pixbufi++ = palettei[*fin++];
467                 break;
468         case 2:
469                 // BGR or BGRA, uncompressed
470                 if (fin + image_width * image_height * pix_inc > enddata)
471                         break;
472                 if (targa_header.pixel_size == 32 && alphabits)
473                 {
474                         for (y = 0;y < image_height;y++)
475                                 memcpy(pixbufi + y * (image_width + row_inci), fin + y * image_width * pix_inc, image_width*4);
476                 }
477                 else
478                 {
479                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
480                         {
481                                 for (x = 0;x < image_width;x++, fin += pix_inc)
482                                 {
483                                         bgra.b[0] = fin[0];
484                                         bgra.b[1] = fin[1];
485                                         bgra.b[2] = fin[2];
486                                         bgra.b[3] = 255;
487                                         *pixbufi++ = bgra.i;
488                                 }
489                         }
490                 }
491                 break;
492         case 9: // colormapped, RLE
493         case 11: // greyscale, RLE
494                 for (y = 0;y < image_height;y++, pixbufi += row_inci)
495                 {
496                         for (x = 0;x < image_width;)
497                         {
498                                 if (fin >= enddata)
499                                         break; // error - truncated file
500                                 runlen = *fin++;
501                                 if (runlen & 0x80)
502                                 {
503                                         // RLE - all pixels the same color
504                                         runlen += 1 - 0x80;
505                                         if (fin + pix_inc > enddata)
506                                                 break; // error - truncated file
507                                         if (x + runlen > image_width)
508                                                 break; // error - line exceeds width
509                                         bgra.i = palettei[*fin++];
510                                         for (;runlen--;x++)
511                                                 *pixbufi++ = bgra.i;
512                                 }
513                                 else
514                                 {
515                                         // uncompressed - all pixels different color
516                                         runlen++;
517                                         if (fin + pix_inc * runlen > enddata)
518                                                 break; // error - truncated file
519                                         if (x + runlen > image_width)
520                                                 break; // error - line exceeds width
521                                         for (;runlen--;x++)
522                                                 *pixbufi++ = palettei[*fin++];
523                                 }
524                         }
525                 }
526                 break;
527         case 10:
528                 // BGR or BGRA, RLE
529                 if (targa_header.pixel_size == 32 && alphabits)
530                 {
531                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
532                         {
533                                 for (x = 0;x < image_width;)
534                                 {
535                                         if (fin >= enddata)
536                                                 break; // error - truncated file
537                                         runlen = *fin++;
538                                         if (runlen & 0x80)
539                                         {
540                                                 // RLE - all pixels the same color
541                                                 runlen += 1 - 0x80;
542                                                 if (fin + pix_inc > enddata)
543                                                         break; // error - truncated file
544                                                 if (x + runlen > image_width)
545                                                         break; // error - line exceeds width
546                                                 bgra.b[0] = fin[0];
547                                                 bgra.b[1] = fin[1];
548                                                 bgra.b[2] = fin[2];
549                                                 bgra.b[3] = fin[3];
550                                                 fin += pix_inc;
551                                                 for (;runlen--;x++)
552                                                         *pixbufi++ = bgra.i;
553                                         }
554                                         else
555                                         {
556                                                 // uncompressed - all pixels different color
557                                                 runlen++;
558                                                 if (fin + pix_inc * runlen > enddata)
559                                                         break; // error - truncated file
560                                                 if (x + runlen > image_width)
561                                                         break; // error - line exceeds width
562                                                 for (;runlen--;x++)
563                                                 {
564                                                         bgra.b[0] = fin[0];
565                                                         bgra.b[1] = fin[1];
566                                                         bgra.b[2] = fin[2];
567                                                         bgra.b[3] = fin[3];
568                                                         fin += pix_inc;
569                                                         *pixbufi++ = bgra.i;
570                                                 }
571                                         }
572                                 }
573                         }
574                 }
575                 else
576                 {
577                         for (y = 0;y < image_height;y++, pixbufi += row_inci)
578                         {
579                                 for (x = 0;x < image_width;)
580                                 {
581                                         if (fin >= enddata)
582                                                 break; // error - truncated file
583                                         runlen = *fin++;
584                                         if (runlen & 0x80)
585                                         {
586                                                 // RLE - all pixels the same color
587                                                 runlen += 1 - 0x80;
588                                                 if (fin + pix_inc > enddata)
589                                                         break; // error - truncated file
590                                                 if (x + runlen > image_width)
591                                                         break; // error - line exceeds width
592                                                 bgra.b[0] = fin[0];
593                                                 bgra.b[1] = fin[1];
594                                                 bgra.b[2] = fin[2];
595                                                 bgra.b[3] = 255;
596                                                 fin += pix_inc;
597                                                 for (;runlen--;x++)
598                                                         *pixbufi++ = bgra.i;
599                                         }
600                                         else
601                                         {
602                                                 // uncompressed - all pixels different color
603                                                 runlen++;
604                                                 if (fin + pix_inc * runlen > enddata)
605                                                         break; // error - truncated file
606                                                 if (x + runlen > image_width)
607                                                         break; // error - line exceeds width
608                                                 for (;runlen--;x++)
609                                                 {
610                                                         bgra.b[0] = fin[0];
611                                                         bgra.b[1] = fin[1];
612                                                         bgra.b[2] = fin[2];
613                                                         bgra.b[3] = 255;
614                                                         fin += pix_inc;
615                                                         *pixbufi++ = bgra.i;
616                                                 }
617                                         }
618                                 }
619                         }
620                 }
621                 break;
622         default:
623                 // unknown image_type
624                 break;
625         }
626
627         return image_buffer;
628 }
629
630 typedef struct q2wal_s
631 {
632         char            name[32];
633         unsigned        width, height;
634         unsigned        offsets[MIPLEVELS];             // four mip maps stored
635         char            animname[32];                   // next frame in animation chain
636         int                     flags;
637         int                     contents;
638         int                     value;
639 } q2wal_t;
640
641 unsigned char *LoadWAL_BGRA (const unsigned char *f, int filesize)
642 {
643         unsigned char *image_buffer;
644         const q2wal_t *inwal = (const q2wal_t *)f;
645
646         if (filesize < (int) sizeof(q2wal_t))
647         {
648                 Con_Print("LoadWAL: invalid WAL file\n");
649                 return NULL;
650         }
651
652         image_width = LittleLong(inwal->width);
653         image_height = LittleLong(inwal->height);
654         if (image_width > 4096 || image_height > 4096 || image_width <= 0 || image_height <= 0)
655         {
656                 Con_Printf("LoadWAL: invalid size %ix%i\n", image_width, image_height);
657                 return NULL;
658         }
659
660         if (filesize < (int) sizeof(q2wal_t) + (int) LittleLong(inwal->offsets[0]) + image_width * image_height)
661         {
662                 Con_Print("LoadWAL: invalid WAL file\n");
663                 return NULL;
664         }
665
666         image_buffer = (unsigned char *)Mem_Alloc(tempmempool, image_width * image_height * 4);
667         if (!image_buffer)
668         {
669                 Con_Printf("LoadWAL: not enough memory for %i by %i image\n", image_width, image_height);
670                 return NULL;
671         }
672         Image_Copy8bitBGRA(f + LittleLong(inwal->offsets[0]), image_buffer, image_width * image_height, palette_bgra_complete);
673         return image_buffer;
674 }
675
676
677 void Image_StripImageExtension (const char *in, char *out, size_t size_out)
678 {
679         const char *ext;
680
681         if (size_out == 0)
682                 return;
683
684         ext = FS_FileExtension(in);
685         if (ext && (!strcmp(ext, "tga") || !strcmp(ext, "pcx") || !strcmp(ext, "lmp") || !strcmp(ext, "png") || !strcmp(ext, "jpg")))
686                 FS_StripExtension(in, out, size_out);
687         else
688                 strlcpy(out, in, size_out);
689 }
690
691 typedef struct imageformat_s
692 {
693         const char *formatstring;
694         unsigned char *(*loadfunc)(const unsigned char *f, int filesize);
695 }
696 imageformat_t;
697
698 // GAME_TENEBRAE only
699 imageformat_t imageformats_tenebrae[] =
700 {
701         {"override/%s.tga", LoadTGA_BGRA},
702         {"override/%s.png", PNG_LoadImage_BGRA},
703         {"override/%s.jpg", JPEG_LoadImage_BGRA},
704         {"override/%s.pcx", LoadPCX_BGRA},
705         {NULL, NULL}
706 };
707
708 imageformat_t imageformats_nopath[] =
709 {
710         {"override/%s.tga", LoadTGA_BGRA},
711         {"override/%s.png", PNG_LoadImage_BGRA},
712         {"override/%s.jpg", JPEG_LoadImage_BGRA},
713         {"textures/%s.tga", LoadTGA_BGRA},
714         {"textures/%s.png", PNG_LoadImage_BGRA},
715         {"textures/%s.jpg", JPEG_LoadImage_BGRA},
716         {"%s.tga", LoadTGA_BGRA},
717         {"%s.png", PNG_LoadImage_BGRA},
718         {"%s.jpg", JPEG_LoadImage_BGRA},
719         {"%s.pcx", LoadPCX_BGRA},
720         {NULL, NULL}
721 };
722
723 // GAME_DELUXEQUAKE only
724 // VorteX: the point why i use such messy texture paths is
725 // that GtkRadiant can't detect normal/gloss textures
726 // and exclude them from texture browser
727 // so i just use additional folder to store this textures
728 imageformat_t imageformats_dq[] =
729 {
730         {"%s.tga", LoadTGA_BGRA},
731         {"%s.jpg", JPEG_LoadImage_BGRA},
732         {"texturemaps/%s.tga", LoadTGA_BGRA},
733         {"texturemaps/%s.jpg", JPEG_LoadImage_BGRA},
734         {NULL, NULL}
735 };
736
737 imageformat_t imageformats_textures[] =
738 {
739         {"%s.tga", LoadTGA_BGRA},
740         {"%s.png", PNG_LoadImage_BGRA},
741         {"%s.jpg", JPEG_LoadImage_BGRA},
742         {"%s.pcx", LoadPCX_BGRA},
743         {"%s.wal", LoadWAL_BGRA},
744         {NULL, NULL}
745 };
746
747 imageformat_t imageformats_gfx[] =
748 {
749         {"%s.tga", LoadTGA_BGRA},
750         {"%s.png", PNG_LoadImage_BGRA},
751         {"%s.jpg", JPEG_LoadImage_BGRA},
752         {"%s.pcx", LoadPCX_BGRA},
753         {NULL, NULL}
754 };
755
756 imageformat_t imageformats_other[] =
757 {
758         {"%s.tga", LoadTGA_BGRA},
759         {"%s.png", PNG_LoadImage_BGRA},
760         {"%s.jpg", JPEG_LoadImage_BGRA},
761         {"%s.pcx", LoadPCX_BGRA},
762         {NULL, NULL}
763 };
764
765 int fixtransparentpixels(unsigned char *data, int w, int h);
766 unsigned char *loadimagepixelsbgra (const char *filename, qboolean complain, qboolean allowFixtrans)
767 {
768         fs_offset_t filesize;
769         imageformat_t *firstformat, *format;
770         unsigned char *f, *data = NULL;
771         char basename[MAX_QPATH], name[MAX_QPATH], *c;
772         if (developer_memorydebug.integer)
773                 Mem_CheckSentinelsGlobal();
774         if (developer_texturelogging.integer)
775                 Log_Printf("textures.log", "%s\n", filename);
776         Image_StripImageExtension(filename, basename, sizeof(basename)); // strip filename extensions to allow replacement by other types
777         // replace *'s with #, so commandline utils don't get confused when dealing with the external files
778         for (c = basename;*c;c++)
779                 if (*c == '*')
780                         *c = '#';
781         name[0] = 0;
782         if (strchr(basename, '/'))
783         {
784                 int i;
785                 for (i = 0;i < (int)sizeof(name)-1 && basename[i] != '/';i++)
786                         name[i] = basename[i];
787                 name[i] = 0;
788         }
789         if (gamemode == GAME_TENEBRAE)
790                 firstformat = imageformats_tenebrae;
791         else if (gamemode == GAME_DELUXEQUAKE)
792                 firstformat = imageformats_dq;
793         else if (!strcasecmp(name, "textures"))
794                 firstformat = imageformats_textures;
795         else if (!strcasecmp(name, "gfx"))
796                 firstformat = imageformats_gfx;
797         else if (!strchr(basename, '/'))
798                 firstformat = imageformats_nopath;
799         else
800                 firstformat = imageformats_other;
801         // now try all the formats in the selected list
802         for (format = firstformat;format->formatstring;format++)
803         {
804                 sprintf (name, format->formatstring, basename);
805                 f = FS_LoadFile(name, tempmempool, true, &filesize);
806                 if (f)
807                 {
808                         data = format->loadfunc(f, filesize);
809                         Mem_Free(f);
810                         if (data)
811                         {
812                                 if (developer.integer >= 10)
813                                         Con_Printf("loaded image %s (%dx%d)\n", name, image_width, image_height);
814                                 if (developer_memorydebug.integer)
815                                         Mem_CheckSentinelsGlobal();
816                                 if(allowFixtrans && r_fixtrans_auto.integer)
817                                 {
818                                         int n = fixtransparentpixels(data, image_width, image_height);
819                                         if(n)
820                                         {
821                                                 Con_Printf("- had to fix %s (%d pixels changed)\n", name, n);
822                                                 if(r_fixtrans_auto.integer >= 2)
823                                                 {
824                                                         char outfilename[MAX_QPATH], buf[MAX_QPATH];
825                                                         Image_StripImageExtension(name, buf, sizeof(buf));
826                                                         dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
827                                                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
828                                                         Con_Printf("- %s written.\n", outfilename);
829                                                 }
830                                         }
831                                 }
832                                 return data;
833                         }
834                         else
835                         {
836                                 if (developer.integer >= 1)
837                                         Con_DPrintf("Error loading image %s (file loaded but decode failed)\n", name);
838                         }
839                 }
840         }
841         if (complain)
842         {
843                 Con_Printf("Couldn't load %s using ", filename);
844                 for (format = firstformat;format->formatstring;format++)
845                 {
846                         sprintf (name, format->formatstring, basename);
847                         Con_Printf(format == firstformat ? "\"%s\"" : (format[1].formatstring ? ", \"%s\"" : " or \"%s\".\n"), format->formatstring);
848                 }
849         }
850         if (developer_memorydebug.integer)
851                 Mem_CheckSentinelsGlobal();
852         return NULL;
853 }
854
855 rtexture_t *loadtextureimage (rtexturepool_t *pool, const char *filename, qboolean complain, int flags, qboolean allowFixtrans)
856 {
857         unsigned char *data;
858         rtexture_t *rt;
859         if (!(data = loadimagepixelsbgra (filename, complain, allowFixtrans)))
860                 return 0;
861         rt = R_LoadTexture2D(pool, filename, image_width, image_height, data, TEXTYPE_BGRA, flags, NULL);
862         Mem_Free(data);
863         return rt;
864 }
865
866 int fixtransparentpixels(unsigned char *data, int w, int h)
867 {
868         int const FIXTRANS_NEEDED = 1;
869         int const FIXTRANS_HAS_L = 2;
870         int const FIXTRANS_HAS_R = 4;
871         int const FIXTRANS_HAS_U = 8;
872         int const FIXTRANS_HAS_D = 16;
873         int const FIXTRANS_FIXED = 32;
874         unsigned char *fixMask = Mem_Alloc(tempmempool, w * h);
875         int fixPixels = 0;
876         int changedPixels = 0;
877         int x, y;
878
879 #define FIXTRANS_PIXEL (y*w+x)
880 #define FIXTRANS_PIXEL_U (((y+h-1)%h)*w+x)
881 #define FIXTRANS_PIXEL_D (((y+1)%h)*w+x)
882 #define FIXTRANS_PIXEL_L (y*w+((x+w-1)%w))
883 #define FIXTRANS_PIXEL_R (y*w+((x+1)%w))
884
885         memset(fixMask, 0, w * h);
886         for(y = 0; y < h; ++y)
887                 for(x = 0; x < w; ++x)
888                 {
889                         if(data[FIXTRANS_PIXEL * 4 + 3] == 0)
890                         {
891                                 fixMask[FIXTRANS_PIXEL] |= FIXTRANS_NEEDED;
892                                 ++fixPixels;
893                         }
894                         else
895                         {
896                                 fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
897                                 fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
898                                 fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
899                                 fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
900                         }
901                 }
902         if(fixPixels == w * h)
903                 return 0; // sorry, can't do anything about this
904         while(fixPixels)
905         {
906                 for(y = 0; y < h; ++y)
907                         for(x = 0; x < w; ++x)
908                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_NEEDED)
909                                 {
910                                         unsigned int sumR = 0, sumG = 0, sumB = 0, sumA = 0, sumRA = 0, sumGA = 0, sumBA = 0, cnt = 0;
911                                         unsigned char r, g, b, a, r0, g0, b0;
912                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_U)
913                                         {
914                                                 r = data[FIXTRANS_PIXEL_U * 4 + 2];
915                                                 g = data[FIXTRANS_PIXEL_U * 4 + 1];
916                                                 b = data[FIXTRANS_PIXEL_U * 4 + 0];
917                                                 a = data[FIXTRANS_PIXEL_U * 4 + 3];
918                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
919                                         }
920                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_D)
921                                         {
922                                                 r = data[FIXTRANS_PIXEL_D * 4 + 2];
923                                                 g = data[FIXTRANS_PIXEL_D * 4 + 1];
924                                                 b = data[FIXTRANS_PIXEL_D * 4 + 0];
925                                                 a = data[FIXTRANS_PIXEL_D * 4 + 3];
926                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
927                                         }
928                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_L)
929                                         {
930                                                 r = data[FIXTRANS_PIXEL_L * 4 + 2];
931                                                 g = data[FIXTRANS_PIXEL_L * 4 + 1];
932                                                 b = data[FIXTRANS_PIXEL_L * 4 + 0];
933                                                 a = data[FIXTRANS_PIXEL_L * 4 + 3];
934                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
935                                         }
936                                         if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_HAS_R)
937                                         {
938                                                 r = data[FIXTRANS_PIXEL_R * 4 + 2];
939                                                 g = data[FIXTRANS_PIXEL_R * 4 + 1];
940                                                 b = data[FIXTRANS_PIXEL_R * 4 + 0];
941                                                 a = data[FIXTRANS_PIXEL_R * 4 + 3];
942                                                 sumR += r; sumG += g; sumB += b; sumA += a; sumRA += r*a; sumGA += g*a; sumBA += b*a; ++cnt;
943                                         }
944                                         if(!cnt)
945                                                 continue;
946                                         r0 = data[FIXTRANS_PIXEL * 4 + 2];
947                                         g0 = data[FIXTRANS_PIXEL * 4 + 1];
948                                         b0 = data[FIXTRANS_PIXEL * 4 + 0];
949                                         if(sumA)
950                                         {
951                                                 // there is a surrounding non-alpha pixel
952                                                 r = (sumRA + sumA / 2) / sumA;
953                                                 g = (sumGA + sumA / 2) / sumA;
954                                                 b = (sumBA + sumA / 2) / sumA;
955                                         }
956                                         else
957                                         {
958                                                 // need to use a "regular" average
959                                                 r = (sumR + cnt / 2) / cnt;
960                                                 g = (sumG + cnt / 2) / cnt;
961                                                 b = (sumB + cnt / 2) / cnt;
962                                         }
963                                         if(r != r0 || g != g0 || b != b0)
964                                                 ++changedPixels;
965                                         data[FIXTRANS_PIXEL * 4 + 2] = r;
966                                         data[FIXTRANS_PIXEL * 4 + 1] = g;
967                                         data[FIXTRANS_PIXEL * 4 + 0] = b;
968                                         fixMask[FIXTRANS_PIXEL] |= FIXTRANS_FIXED;
969                                 }
970                 for(y = 0; y < h; ++y)
971                         for(x = 0; x < w; ++x)
972                                 if(fixMask[FIXTRANS_PIXEL] & FIXTRANS_FIXED)
973                                 {
974                                         fixMask[FIXTRANS_PIXEL] &= ~(FIXTRANS_NEEDED | FIXTRANS_FIXED);
975                                         fixMask[FIXTRANS_PIXEL_D] |= FIXTRANS_HAS_U;
976                                         fixMask[FIXTRANS_PIXEL_U] |= FIXTRANS_HAS_D;
977                                         fixMask[FIXTRANS_PIXEL_R] |= FIXTRANS_HAS_L;
978                                         fixMask[FIXTRANS_PIXEL_L] |= FIXTRANS_HAS_R;
979                                         --fixPixels;
980                                 }
981         }
982         return changedPixels;
983 }
984
985 void Image_FixTransparentPixels_f(void)
986 {
987         const char *filename, *filename_pattern;
988         fssearch_t *search;
989         int i, n;
990         char outfilename[MAX_QPATH], buf[MAX_QPATH];
991         unsigned char *data;
992         if(Cmd_Argc() != 2)
993         {
994                 Con_Printf("Usage: %s imagefile\n", Cmd_Argv(0));
995                 return;
996         }
997         filename_pattern = Cmd_Argv(1);
998         search = FS_Search(filename_pattern, true, true);
999         if(!search)
1000                 return;
1001         for(i = 0; i < search->numfilenames; ++i)
1002         {
1003                 filename = search->filenames[i];
1004                 Con_Printf("Processing %s... ", filename);
1005                 Image_StripImageExtension(filename, buf, sizeof(buf));
1006                 dpsnprintf(outfilename, sizeof(outfilename), "fixtrans/%s.tga", buf);
1007                 if(!(data = loadimagepixelsbgra(filename, true, false)))
1008                         return;
1009                 if((n = fixtransparentpixels(data, image_width, image_height)))
1010                 {
1011                         Image_WriteTGABGRA(outfilename, image_width, image_height, data);
1012                         Con_Printf("%s written (%d pixels changed).\n", outfilename, n);
1013                 }
1014                 else
1015                         Con_Printf("unchanged.\n");
1016                 Mem_Free(data);
1017         }
1018 }
1019
1020 qboolean Image_WriteTGABGR_preflipped (const char *filename, int width, int height, const unsigned char *data, unsigned char *buffer)
1021 {
1022         qboolean ret;
1023
1024         memset (buffer, 0, 18);
1025         buffer[2] = 2;          // uncompressed type
1026         buffer[12] = (width >> 0) & 0xFF;
1027         buffer[13] = (width >> 8) & 0xFF;
1028         buffer[14] = (height >> 0) & 0xFF;
1029         buffer[15] = (height >> 8) & 0xFF;
1030         buffer[16] = 24;        // pixel size
1031
1032         // swap rgb to bgr
1033         memcpy(buffer + 18, data, width*height*3);
1034         ret = FS_WriteFile (filename, buffer, width*height*3 + 18 );
1035
1036         return ret;
1037 }
1038
1039 void Image_WriteTGABGRA (const char *filename, int width, int height, const unsigned char *data)
1040 {
1041         int y;
1042         unsigned char *buffer, *out;
1043         const unsigned char *in, *end;
1044
1045         buffer = (unsigned char *)Mem_Alloc(tempmempool, width*height*4 + 18);
1046
1047         memset (buffer, 0, 18);
1048         buffer[2] = 2;          // uncompressed type
1049         buffer[12] = (width >> 0) & 0xFF;
1050         buffer[13] = (width >> 8) & 0xFF;
1051         buffer[14] = (height >> 0) & 0xFF;
1052         buffer[15] = (height >> 8) & 0xFF;
1053
1054         for (y = 3;y < width*height*4;y += 4)
1055                 if (data[y] < 255)
1056                         break;
1057
1058         if (y < width*height*4)
1059         {
1060                 // save the alpha channel
1061                 buffer[16] = 32;        // pixel size
1062                 buffer[17] = 8; // 8 bits of alpha
1063
1064                 // flip upside down
1065                 out = buffer + 18;
1066                 for (y = height - 1;y >= 0;y--)
1067                 {
1068                         memcpy(out, data + y * width * 4, width * 4);
1069                         out += width*4;
1070                 }
1071         }
1072         else
1073         {
1074                 // save only the color channels
1075                 buffer[16] = 24;        // pixel size
1076                 buffer[17] = 0; // 8 bits of alpha
1077
1078                 // truncate bgra to bgr and flip upside down
1079                 out = buffer + 18;
1080                 for (y = height - 1;y >= 0;y--)
1081                 {
1082                         in = data + y * width * 4;
1083                         end = in + width * 4;
1084                         for (;in < end;in += 4)
1085                         {
1086                                 *out++ = in[0];
1087                                 *out++ = in[1];
1088                                 *out++ = in[2];
1089                         }
1090                 }
1091         }
1092         FS_WriteFile (filename, buffer, out - buffer);
1093
1094         Mem_Free(buffer);
1095 }
1096
1097 static void Image_Resample32LerpLine (const unsigned char *in, unsigned char *out, int inwidth, int outwidth)
1098 {
1099         int             j, xi, oldx = 0, f, fstep, endx, lerp;
1100         fstep = (int) (inwidth*65536.0f/outwidth);
1101         endx = (inwidth-1);
1102         for (j = 0,f = 0;j < outwidth;j++, f += fstep)
1103         {
1104                 xi = f >> 16;
1105                 if (xi != oldx)
1106                 {
1107                         in += (xi - oldx) * 4;
1108                         oldx = xi;
1109                 }
1110                 if (xi < endx)
1111                 {
1112                         lerp = f & 0xFFFF;
1113                         *out++ = (unsigned char) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
1114                         *out++ = (unsigned char) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
1115                         *out++ = (unsigned char) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
1116                         *out++ = (unsigned char) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
1117                 }
1118                 else // last pixel of the line has no pixel to lerp to
1119                 {
1120                         *out++ = in[0];
1121                         *out++ = in[1];
1122                         *out++ = in[2];
1123                         *out++ = in[3];
1124                 }
1125         }
1126 }
1127
1128 #define LERPBYTE(i) r = resamplerow1[i];out[i] = (unsigned char) ((((resamplerow2[i] - r) * lerp) >> 16) + r)
1129 void Image_Resample32Lerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1130 {
1131         int i, j, r, yi, oldy, f, fstep, lerp, endy = (inheight-1), inwidth4 = inwidth*4, outwidth4 = outwidth*4;
1132         unsigned char *out;
1133         const unsigned char *inrow;
1134         unsigned char *resamplerow1;
1135         unsigned char *resamplerow2;
1136         out = (unsigned char *)outdata;
1137         fstep = (int) (inheight*65536.0f/outheight);
1138
1139         resamplerow1 = (unsigned char *)Mem_Alloc(tempmempool, outwidth*4*2);
1140         resamplerow2 = resamplerow1 + outwidth*4;
1141
1142         inrow = (const unsigned char *)indata;
1143         oldy = 0;
1144         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1145         Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1146         for (i = 0, f = 0;i < outheight;i++,f += fstep)
1147         {
1148                 yi = f >> 16;
1149                 if (yi < endy)
1150                 {
1151                         lerp = f & 0xFFFF;
1152                         if (yi != oldy)
1153                         {
1154                                 inrow = (unsigned char *)indata + inwidth4*yi;
1155                                 if (yi == oldy+1)
1156                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1157                                 else
1158                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1159                                 Image_Resample32LerpLine (inrow + inwidth4, resamplerow2, inwidth, outwidth);
1160                                 oldy = yi;
1161                         }
1162                         j = outwidth - 4;
1163                         while(j >= 0)
1164                         {
1165                                 LERPBYTE( 0);
1166                                 LERPBYTE( 1);
1167                                 LERPBYTE( 2);
1168                                 LERPBYTE( 3);
1169                                 LERPBYTE( 4);
1170                                 LERPBYTE( 5);
1171                                 LERPBYTE( 6);
1172                                 LERPBYTE( 7);
1173                                 LERPBYTE( 8);
1174                                 LERPBYTE( 9);
1175                                 LERPBYTE(10);
1176                                 LERPBYTE(11);
1177                                 LERPBYTE(12);
1178                                 LERPBYTE(13);
1179                                 LERPBYTE(14);
1180                                 LERPBYTE(15);
1181                                 out += 16;
1182                                 resamplerow1 += 16;
1183                                 resamplerow2 += 16;
1184                                 j -= 4;
1185                         }
1186                         if (j & 2)
1187                         {
1188                                 LERPBYTE( 0);
1189                                 LERPBYTE( 1);
1190                                 LERPBYTE( 2);
1191                                 LERPBYTE( 3);
1192                                 LERPBYTE( 4);
1193                                 LERPBYTE( 5);
1194                                 LERPBYTE( 6);
1195                                 LERPBYTE( 7);
1196                                 out += 8;
1197                                 resamplerow1 += 8;
1198                                 resamplerow2 += 8;
1199                         }
1200                         if (j & 1)
1201                         {
1202                                 LERPBYTE( 0);
1203                                 LERPBYTE( 1);
1204                                 LERPBYTE( 2);
1205                                 LERPBYTE( 3);
1206                                 out += 4;
1207                                 resamplerow1 += 4;
1208                                 resamplerow2 += 4;
1209                         }
1210                         resamplerow1 -= outwidth4;
1211                         resamplerow2 -= outwidth4;
1212                 }
1213                 else
1214                 {
1215                         if (yi != oldy)
1216                         {
1217                                 inrow = (unsigned char *)indata + inwidth4*yi;
1218                                 if (yi == oldy+1)
1219                                         memcpy(resamplerow1, resamplerow2, outwidth4);
1220                                 else
1221                                         Image_Resample32LerpLine (inrow, resamplerow1, inwidth, outwidth);
1222                                 oldy = yi;
1223                         }
1224                         memcpy(out, resamplerow1, outwidth4);
1225                 }
1226         }
1227
1228         Mem_Free(resamplerow1);
1229         resamplerow1 = NULL;
1230         resamplerow2 = NULL;
1231 }
1232
1233 void Image_Resample32Nolerp(const void *indata, int inwidth, int inheight, void *outdata, int outwidth, int outheight)
1234 {
1235         int i, j;
1236         unsigned frac, fracstep;
1237         // relies on int being 4 bytes
1238         int *inrow, *out;
1239         out = (int *)outdata;
1240
1241         fracstep = inwidth*0x10000/outwidth;
1242         for (i = 0;i < outheight;i++)
1243         {
1244                 inrow = (int *)indata + inwidth*(i*inheight/outheight);
1245                 frac = fracstep >> 1;
1246                 j = outwidth - 4;
1247                 while (j >= 0)
1248                 {
1249                         out[0] = inrow[frac >> 16];frac += fracstep;
1250                         out[1] = inrow[frac >> 16];frac += fracstep;
1251                         out[2] = inrow[frac >> 16];frac += fracstep;
1252                         out[3] = inrow[frac >> 16];frac += fracstep;
1253                         out += 4;
1254                         j -= 4;
1255                 }
1256                 if (j & 2)
1257                 {
1258                         out[0] = inrow[frac >> 16];frac += fracstep;
1259                         out[1] = inrow[frac >> 16];frac += fracstep;
1260                         out += 2;
1261                 }
1262                 if (j & 1)
1263                 {
1264                         out[0] = inrow[frac >> 16];frac += fracstep;
1265                         out += 1;
1266                 }
1267         }
1268 }
1269
1270 /*
1271 ================
1272 Image_Resample
1273 ================
1274 */
1275 void Image_Resample32(const void *indata, int inwidth, int inheight, int indepth, void *outdata, int outwidth, int outheight, int outdepth, int quality)
1276 {
1277         if (indepth != 1 || outdepth != 1)
1278         {
1279                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1280                 return;
1281         }
1282         if (quality)
1283                 Image_Resample32Lerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1284         else
1285                 Image_Resample32Nolerp(indata, inwidth, inheight, outdata, outwidth, outheight);
1286 }
1287
1288 // in can be the same as out
1289 void Image_MipReduce32(const unsigned char *in, unsigned char *out, int *width, int *height, int *depth, int destwidth, int destheight, int destdepth)
1290 {
1291         const unsigned char *inrow;
1292         int x, y, nextrow;
1293         if (*depth != 1 || destdepth != 1)
1294         {
1295                 Con_Printf ("Image_Resample: 3D resampling not supported\n");
1296                 if (*width > destwidth)
1297                         *width >>= 1;
1298                 if (*height > destheight)
1299                         *height >>= 1;
1300                 if (*depth > destdepth)
1301                         *depth >>= 1;
1302                 return;
1303         }
1304         // note: if given odd width/height this discards the last row/column of
1305         // pixels, rather than doing a proper box-filter scale down
1306         inrow = in;
1307         nextrow = *width * 4;
1308         if (*width > destwidth)
1309         {
1310                 *width >>= 1;
1311                 if (*height > destheight)
1312                 {
1313                         // reduce both
1314                         *height >>= 1;
1315                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1316                         {
1317                                 for (in = inrow, x = 0;x < *width;x++)
1318                                 {
1319                                         out[0] = (unsigned char) ((in[0] + in[4] + in[nextrow  ] + in[nextrow+4]) >> 2);
1320                                         out[1] = (unsigned char) ((in[1] + in[5] + in[nextrow+1] + in[nextrow+5]) >> 2);
1321                                         out[2] = (unsigned char) ((in[2] + in[6] + in[nextrow+2] + in[nextrow+6]) >> 2);
1322                                         out[3] = (unsigned char) ((in[3] + in[7] + in[nextrow+3] + in[nextrow+7]) >> 2);
1323                                         out += 4;
1324                                         in += 8;
1325                                 }
1326                         }
1327                 }
1328                 else
1329                 {
1330                         // reduce width
1331                         for (y = 0;y < *height;y++, inrow += nextrow)
1332                         {
1333                                 for (in = inrow, x = 0;x < *width;x++)
1334                                 {
1335                                         out[0] = (unsigned char) ((in[0] + in[4]) >> 1);
1336                                         out[1] = (unsigned char) ((in[1] + in[5]) >> 1);
1337                                         out[2] = (unsigned char) ((in[2] + in[6]) >> 1);
1338                                         out[3] = (unsigned char) ((in[3] + in[7]) >> 1);
1339                                         out += 4;
1340                                         in += 8;
1341                                 }
1342                         }
1343                 }
1344         }
1345         else
1346         {
1347                 if (*height > destheight)
1348                 {
1349                         // reduce height
1350                         *height >>= 1;
1351                         for (y = 0;y < *height;y++, inrow += nextrow * 2)
1352                         {
1353                                 for (in = inrow, x = 0;x < *width;x++)
1354                                 {
1355                                         out[0] = (unsigned char) ((in[0] + in[nextrow  ]) >> 1);
1356                                         out[1] = (unsigned char) ((in[1] + in[nextrow+1]) >> 1);
1357                                         out[2] = (unsigned char) ((in[2] + in[nextrow+2]) >> 1);
1358                                         out[3] = (unsigned char) ((in[3] + in[nextrow+3]) >> 1);
1359                                         out += 4;
1360                                         in += 4;
1361                                 }
1362                         }
1363                 }
1364                 else
1365                         Con_Printf ("Image_MipReduce: desired size already achieved\n");
1366         }
1367 }
1368
1369 void Image_HeightmapToNormalmap_BGRA(const unsigned char *inpixels, unsigned char *outpixels, int width, int height, int clamp, float bumpscale)
1370 {
1371         int x, y, x1, x2, y1, y2;
1372         const unsigned char *b, *row[3];
1373         int p[5];
1374         unsigned char *out;
1375         float iwidth, iheight, ibumpscale, n[3];
1376         iwidth = 1.0f / width;
1377         iheight = 1.0f / height;
1378         ibumpscale = (255.0f * 6.0f) / bumpscale;
1379         out = outpixels;
1380         for (y = 0, y1 = height-1;y < height;y1 = y, y++)
1381         {
1382                 y2 = y + 1;if (y2 >= height) y2 = 0;
1383                 row[0] = inpixels + (y1 * width) * 4;
1384                 row[1] = inpixels + (y  * width) * 4;
1385                 row[2] = inpixels + (y2 * width) * 4;
1386                 for (x = 0, x1 = width-1;x < width;x1 = x, x++)
1387                 {
1388                         x2 = x + 1;if (x2 >= width) x2 = 0;
1389                         // left, right
1390                         b = row[1] + x1 * 4;p[0] = (b[0] + b[1] + b[2]);
1391                         b = row[1] + x2 * 4;p[1] = (b[0] + b[1] + b[2]);
1392                         // above, below
1393                         b = row[0] + x  * 4;p[2] = (b[0] + b[1] + b[2]);
1394                         b = row[2] + x  * 4;p[3] = (b[0] + b[1] + b[2]);
1395                         // center
1396                         b = row[1] + x  * 4;p[4] = (b[0] + b[1] + b[2]);
1397                         // calculate a normal from the slopes
1398                         n[0] = p[0] - p[1];
1399                         n[1] = p[3] - p[2];
1400                         n[2] = ibumpscale;
1401                         VectorNormalize(n);
1402                         // turn it into a dot3 rgb vector texture
1403                         out[2] = (int)(128.0f + n[0] * 127.0f);
1404                         out[1] = (int)(128.0f + n[1] * 127.0f);
1405                         out[0] = (int)(128.0f + n[2] * 127.0f);
1406                         out[3] = (p[4]) / 3;
1407                         out += 4;
1408                 }
1409         }
1410 }