1 |
/* Copyright (c) 1992 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* ra_t8.c - program to convert between RADIANCE and |
9 |
* Targa 8-bit color-mapped images. |
10 |
* |
11 |
* 8/22/88 Adapted from ra_pr.c |
12 |
*/ |
13 |
|
14 |
#include <stdio.h> |
15 |
|
16 |
#include "color.h" |
17 |
|
18 |
#include "resolu.h" |
19 |
|
20 |
#include "targa.h" |
21 |
|
22 |
#ifdef MSDOS |
23 |
#include <fcntl.h> |
24 |
#endif |
25 |
|
26 |
#include <math.h> |
27 |
|
28 |
#ifndef BSD |
29 |
#define bcopy(s,d,n) (void)memcpy(d,s,n) |
30 |
extern char *memcpy(); |
31 |
#endif |
32 |
|
33 |
#define goodpic(h) (my_imType(h) && my_mapType(h)) |
34 |
#define my_imType(h) (((h)->dataType==IM_CMAP || (h)->dataType==IM_CCMAP) \ |
35 |
&& (h)->dataBits==8 && (h)->imType==0) |
36 |
#define my_mapType(h) ((h)->mapType==CM_HASMAP && \ |
37 |
((h)->CMapBits==24 || (h)->CMapBits==32)) |
38 |
|
39 |
#define taralloc(h) (BYTE *)emalloc((h)->x*(h)->y) |
40 |
|
41 |
extern BYTE clrtab[][3]; |
42 |
|
43 |
extern char *ecalloc(), *emalloc(); |
44 |
|
45 |
extern long ftell(); |
46 |
|
47 |
double gamv = 2.2; /* gamv correction */ |
48 |
|
49 |
int bradj = 0; /* brightness adjustment */ |
50 |
|
51 |
char *progname; |
52 |
|
53 |
char errmsg[128]; |
54 |
|
55 |
COLR *inl; |
56 |
|
57 |
BYTE *tarData; |
58 |
|
59 |
int xmax, ymax; |
60 |
|
61 |
|
62 |
main(argc, argv) |
63 |
int argc; |
64 |
char *argv[]; |
65 |
{ |
66 |
struct hdStruct head; |
67 |
int dither = 1; |
68 |
int reverse = 0; |
69 |
int ncolors = 256; |
70 |
int greyscale = 0; |
71 |
int i; |
72 |
#ifdef MSDOS |
73 |
extern int _fmode; |
74 |
_fmode = O_BINARY; |
75 |
setmode(fileno(stdin), O_BINARY); |
76 |
setmode(fileno(stdout), O_BINARY); |
77 |
#endif |
78 |
progname = argv[0]; |
79 |
|
80 |
for (i = 1; i < argc; i++) |
81 |
if (argv[i][0] == '-') |
82 |
switch (argv[i][1]) { |
83 |
case 'd': |
84 |
dither = !dither; |
85 |
break; |
86 |
case 'g': |
87 |
gamv = atof(argv[++i]); |
88 |
break; |
89 |
case 'r': |
90 |
reverse = !reverse; |
91 |
break; |
92 |
case 'b': |
93 |
greyscale = 1; |
94 |
break; |
95 |
case 'e': |
96 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
97 |
goto userr; |
98 |
bradj = atoi(argv[++i]); |
99 |
break; |
100 |
case 'c': |
101 |
ncolors = atoi(argv[++i]); |
102 |
break; |
103 |
default: |
104 |
goto userr; |
105 |
} |
106 |
else |
107 |
break; |
108 |
|
109 |
if (i < argc-2) |
110 |
goto userr; |
111 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
112 |
sprintf(errmsg, "cannot open input \"%s\"", argv[i]); |
113 |
quiterr(errmsg); |
114 |
} |
115 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
116 |
sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]); |
117 |
quiterr(errmsg); |
118 |
} |
119 |
if (reverse) { |
120 |
/* get header */ |
121 |
if (getthead(&head, NULL, stdin) < 0) |
122 |
quiterr("bad targa file"); |
123 |
if (!goodpic(&head)) |
124 |
quiterr("incompatible format"); |
125 |
xmax = head.x; |
126 |
ymax = head.y; |
127 |
/* put header */ |
128 |
printargs(i, argv, stdout); |
129 |
fputformat(COLRFMT, stdout); |
130 |
putchar('\n'); |
131 |
fprtresolu(xmax, ymax, stdout); |
132 |
/* convert file */ |
133 |
tg2ra(&head); |
134 |
} else { |
135 |
if (getrhead(&head, stdin) < 0) |
136 |
quiterr("bad Radiance input"); |
137 |
/* write header */ |
138 |
putthead(&head, NULL, stdout); |
139 |
/* convert file */ |
140 |
if (greyscale) |
141 |
getgrey(ncolors); |
142 |
else |
143 |
getmapped(ncolors, dither); |
144 |
/* write data */ |
145 |
writetarga(&head, tarData, stdout); |
146 |
} |
147 |
quiterr(NULL); |
148 |
userr: |
149 |
fprintf(stderr, |
150 |
"Usage: %s [-d][-c ncolors][-b][-g gamv][-e +/-stops] input [output]\n", |
151 |
progname); |
152 |
fprintf(stderr, " Or: %s -r [-g gamv][-e +/-stops] [input [output]]\n", |
153 |
progname); |
154 |
exit(1); |
155 |
} |
156 |
|
157 |
|
158 |
int |
159 |
getint2(fp) /* get a 2-byte positive integer */ |
160 |
register FILE *fp; |
161 |
{ |
162 |
register int b1, b2; |
163 |
|
164 |
if ((b1 = getc(fp)) == EOF || (b2 = getc(fp)) == EOF) |
165 |
quiterr("read error"); |
166 |
|
167 |
return(b1 | b2<<8); |
168 |
} |
169 |
|
170 |
|
171 |
putint2(i, fp) /* put a 2-byte positive integer */ |
172 |
register int i; |
173 |
register FILE *fp; |
174 |
{ |
175 |
putc(i&0xff, fp); |
176 |
putc(i>>8&0xff, fp); |
177 |
} |
178 |
|
179 |
|
180 |
quiterr(err) /* print message and exit */ |
181 |
char *err; |
182 |
{ |
183 |
if (err != NULL) { |
184 |
fprintf(stderr, "%s: %s\n", progname, err); |
185 |
exit(1); |
186 |
} |
187 |
exit(0); |
188 |
} |
189 |
|
190 |
|
191 |
eputs(s) |
192 |
char *s; |
193 |
{ |
194 |
fputs(s, stderr); |
195 |
} |
196 |
|
197 |
|
198 |
quit(code) |
199 |
int code; |
200 |
{ |
201 |
exit(code); |
202 |
} |
203 |
|
204 |
|
205 |
getthead(hp, ip, fp) /* read header from input */ |
206 |
struct hdStruct *hp; |
207 |
char *ip; |
208 |
register FILE *fp; |
209 |
{ |
210 |
int nidbytes; |
211 |
|
212 |
if ((nidbytes = getc(fp)) == EOF) |
213 |
return(-1); |
214 |
hp->mapType = getc(fp); |
215 |
hp->dataType = getc(fp); |
216 |
hp->mapOrig = getint2(fp); |
217 |
hp->mapLength = getint2(fp); |
218 |
hp->CMapBits = getc(fp); |
219 |
hp->XOffset = getint2(fp); |
220 |
hp->YOffset = getint2(fp); |
221 |
hp->x = getint2(fp); |
222 |
hp->y = getint2(fp); |
223 |
hp->dataBits = getc(fp); |
224 |
hp->imType = getc(fp); |
225 |
|
226 |
if (ip != NULL) |
227 |
if (nidbytes) |
228 |
fread((char *)ip, nidbytes, 1, fp); |
229 |
else |
230 |
*ip = '\0'; |
231 |
else if (nidbytes) |
232 |
fseek(fp, (long)nidbytes, 1); |
233 |
|
234 |
return(feof(fp) || ferror(fp) ? -1 : 0); |
235 |
} |
236 |
|
237 |
|
238 |
putthead(hp, ip, fp) /* write header to output */ |
239 |
struct hdStruct *hp; |
240 |
char *ip; |
241 |
register FILE *fp; |
242 |
{ |
243 |
if (ip != NULL) |
244 |
putc(strlen(ip), fp); |
245 |
else |
246 |
putc(0, fp); |
247 |
putc(hp->mapType, fp); |
248 |
putc(hp->dataType, fp); |
249 |
putint2(hp->mapOrig, fp); |
250 |
putint2(hp->mapLength, fp); |
251 |
putc(hp->CMapBits, fp); |
252 |
putint2(hp->XOffset, fp); |
253 |
putint2(hp->YOffset, fp); |
254 |
putint2(hp->x, fp); |
255 |
putint2(hp->y, fp); |
256 |
putc(hp->dataBits, fp); |
257 |
putc(hp->imType, fp); |
258 |
|
259 |
if (ip != NULL) |
260 |
fputs(ip, fp); |
261 |
|
262 |
return(ferror(fp) ? -1 : 0); |
263 |
} |
264 |
|
265 |
|
266 |
getrhead(h, fp) /* load RADIANCE input file header */ |
267 |
register struct hdStruct *h; |
268 |
FILE *fp; |
269 |
{ |
270 |
/* get header info. */ |
271 |
if (checkheader(fp, COLRFMT, NULL) < 0 || |
272 |
fgetresolu(&xmax, &ymax, fp) < 0) |
273 |
return(-1); |
274 |
/* assign header */ |
275 |
h->textSize = 0; |
276 |
h->mapType = CM_HASMAP; |
277 |
h->dataType = IM_CMAP; |
278 |
h->mapOrig = 0; |
279 |
h->mapLength = 256; |
280 |
h->CMapBits = 24; |
281 |
h->XOffset = 0; |
282 |
h->YOffset = 0; |
283 |
h->x = xmax; |
284 |
h->y = ymax; |
285 |
h->dataBits = 8; |
286 |
h->imType = 0; |
287 |
/* allocate scanline */ |
288 |
inl = (COLR *)emalloc(xmax*sizeof(COLR)); |
289 |
/* allocate targa data */ |
290 |
tarData = taralloc(h); |
291 |
|
292 |
return(0); |
293 |
} |
294 |
|
295 |
|
296 |
tg2ra(hp) /* targa file to RADIANCE file */ |
297 |
struct hdStruct *hp; |
298 |
{ |
299 |
union { |
300 |
BYTE c3[256][3]; |
301 |
BYTE c4[256][4]; |
302 |
} map; |
303 |
COLR ctab[256]; |
304 |
COLR *scanline; |
305 |
register int i, j; |
306 |
|
307 |
/* get color table */ |
308 |
if ((hp->CMapBits==24 ? fread((char *)(map.c3+hp->mapOrig), |
309 |
3*hp->mapLength,1,stdin) : |
310 |
fread((char *)(map.c4+hp->mapOrig), |
311 |
4*hp->mapLength,1,stdin)) != 1) |
312 |
quiterr("error reading color table"); |
313 |
/* convert table */ |
314 |
for (i = hp->mapOrig; i < hp->mapOrig+hp->mapLength; i++) |
315 |
if (hp->CMapBits == 24) |
316 |
setcolr(ctab[i], |
317 |
pow((map.c3[i][2]+.5)/256.,gamv), |
318 |
pow((map.c3[i][1]+.5)/256.,gamv), |
319 |
pow((map.c3[i][0]+.5)/256.,gamv)); |
320 |
else |
321 |
setcolr(ctab[i], |
322 |
pow((map.c4[i][3]+.5)/256.,gamv), |
323 |
pow((map.c4[i][2]+.5)/256.,gamv), |
324 |
pow((map.c4[i][1]+.5)/256.,gamv)); |
325 |
if (bradj) |
326 |
shiftcolrs(ctab, 256, bradj); |
327 |
/* allocate targa data */ |
328 |
tarData = taralloc(hp); |
329 |
/* get data */ |
330 |
readtarga(hp, tarData, stdin); |
331 |
/* allocate input scanline */ |
332 |
scanline = (COLR *)emalloc(xmax*sizeof(COLR)); |
333 |
/* convert file */ |
334 |
for (i = ymax-1; i >= 0; i--) { |
335 |
for (j = 0; j < xmax; j++) |
336 |
copycolr(scanline[j], ctab[tarData[i*xmax+j]]); |
337 |
if (fwritecolrs(scanline, xmax, stdout) < 0) |
338 |
quiterr("error writing RADIANCE file"); |
339 |
} |
340 |
free((char *)scanline); |
341 |
free((char *)tarData); |
342 |
} |
343 |
|
344 |
|
345 |
getmapped(nc, dith) /* read in and quantize image */ |
346 |
int nc; /* number of colors to use */ |
347 |
int dith; /* use dithering? */ |
348 |
{ |
349 |
long fpos; |
350 |
register int y; |
351 |
|
352 |
setcolrgam(gamv); |
353 |
fpos = ftell(stdin); |
354 |
new_histo(); /* build histogram */ |
355 |
for (y = ymax-1; y >= 0; y--) { |
356 |
if (freadcolrs(inl, xmax, stdin) < 0) |
357 |
quiterr("error reading Radiance input"); |
358 |
if (bradj) |
359 |
shiftcolrs(inl, xmax, bradj); |
360 |
colrs_gambs(inl, xmax); |
361 |
cnt_colrs(inl, xmax); |
362 |
} |
363 |
if (fseek(stdin, fpos, 0) == EOF) |
364 |
quiterr("Radiance input must be from a file"); |
365 |
new_clrtab(nc); /* map colors */ |
366 |
for (y = ymax-1; y >= 0; y--) { |
367 |
if (freadcolrs(inl, xmax, stdin) < 0) |
368 |
quiterr("error reading Radiance input"); |
369 |
if (bradj) |
370 |
shiftcolrs(inl, xmax, bradj); |
371 |
colrs_gambs(inl, xmax); |
372 |
if (dith) |
373 |
dith_colrs(tarData+y*xmax, inl, xmax); |
374 |
else |
375 |
map_colrs(tarData+y*xmax, inl, xmax); |
376 |
} |
377 |
} |
378 |
|
379 |
|
380 |
getgrey(nc) /* read in and convert to greyscale image */ |
381 |
int nc; /* number of colors to use */ |
382 |
{ |
383 |
int y; |
384 |
register BYTE *dp; |
385 |
register int x; |
386 |
|
387 |
setcolrgam(gamv); |
388 |
dp = tarData+xmax*ymax;; |
389 |
for (y = ymax-1; y >= 0; y--) { |
390 |
if (freadcolrs(inl, xmax, stdin) < 0) |
391 |
quiterr("error reading Radiance input"); |
392 |
if (bradj) |
393 |
shiftcolrs(inl, xmax, bradj); |
394 |
x = xmax; |
395 |
while (x--) |
396 |
inl[x][GRN] = normbright(inl[x]); |
397 |
colrs_gambs(inl, xmax); |
398 |
x = xmax; |
399 |
if (nc < 256) |
400 |
while (x--) |
401 |
*--dp = ((long)inl[x][GRN]*nc+nc/2)>>8; |
402 |
else |
403 |
while (x--) |
404 |
*--dp = inl[x][GRN]; |
405 |
} |
406 |
for (x = 0; x < nc; x++) |
407 |
clrtab[x][RED] = clrtab[x][GRN] = |
408 |
clrtab[x][BLU] = ((long)x*256+128)/nc; |
409 |
} |
410 |
|
411 |
|
412 |
writetarga(h, d, fp) /* write out targa data */ |
413 |
struct hdStruct *h; |
414 |
BYTE *d; |
415 |
FILE *fp; |
416 |
{ |
417 |
register int i, j; |
418 |
|
419 |
for (i = 0; i < h->mapLength; i++) /* write color map */ |
420 |
for (j = 2; j >= 0; j--) |
421 |
putc(clrtab[i][j], fp); |
422 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
423 |
if (fwrite((char *)d,h->x*sizeof(BYTE),h->y,fp) != h->y) |
424 |
quiterr("error writing targa file"); |
425 |
return; |
426 |
} |
427 |
quiterr("unsupported output type"); |
428 |
} |
429 |
|
430 |
|
431 |
readtarga(h, data, fp) /* read in targa data */ |
432 |
struct hdStruct *h; |
433 |
BYTE *data; |
434 |
FILE *fp; |
435 |
{ |
436 |
register int cnt, c; |
437 |
register BYTE *dp; |
438 |
|
439 |
if (h->dataType == IM_CMAP) { /* uncompressed */ |
440 |
if (fread((char *)data,h->x*sizeof(BYTE),h->y,fp) != h->y) |
441 |
goto readerr; |
442 |
return; |
443 |
} |
444 |
for (dp = data; dp < data+h->x*h->y; ) { |
445 |
if ((c = getc(fp)) == EOF) |
446 |
goto readerr; |
447 |
cnt = (c & 0x7f) + 1; |
448 |
if (c & 0x80) { /* repeated pixel */ |
449 |
if ((c = getc(fp)) == EOF) |
450 |
goto readerr; |
451 |
while (cnt--) |
452 |
*dp++ = c; |
453 |
} else /* non-repeating pixels */ |
454 |
while (cnt--) { |
455 |
if ((c = getc(fp)) == EOF) |
456 |
goto readerr; |
457 |
*dp++ = c; |
458 |
} |
459 |
} |
460 |
return; |
461 |
readerr: |
462 |
quiterr("error reading targa file"); |
463 |
} |