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 |
* program to convert between RADIANCE and Poskanzer Pixmaps |
9 |
*/ |
10 |
|
11 |
#include <stdio.h> |
12 |
|
13 |
#ifdef MSDOS |
14 |
#include <fcntl.h> |
15 |
#endif |
16 |
|
17 |
#include <math.h> |
18 |
|
19 |
#include <ctype.h> |
20 |
|
21 |
#include "color.h" |
22 |
|
23 |
#include "resolu.h" |
24 |
|
25 |
|
26 |
extern char *malloc(); |
27 |
|
28 |
int agryscan(), bgryscan(), aclrscan(), bclrscan(); |
29 |
int agryscan2(), bgryscan2(), aclrscan2(), bclrscan2(); |
30 |
int normval(); |
31 |
unsigned int scanint(), intv(), getby2(); |
32 |
|
33 |
#define fltv(i) (((i)+.5)/(maxval+1.)) |
34 |
|
35 |
int bradj = 0; /* brightness adjustment */ |
36 |
|
37 |
double gamcor = 2.2; /* gamma correction value */ |
38 |
|
39 |
int maxval = 255; /* maximum primary value */ |
40 |
|
41 |
char *progname; |
42 |
|
43 |
int xmax, ymax; |
44 |
|
45 |
|
46 |
main(argc, argv) |
47 |
int argc; |
48 |
char *argv[]; |
49 |
{ |
50 |
char inpbuf[2]; |
51 |
int gryflag = 0; |
52 |
int binflag = 1; |
53 |
int reverse = 0; |
54 |
int ptype; |
55 |
int i; |
56 |
|
57 |
progname = argv[0]; |
58 |
|
59 |
for (i = 1; i < argc; i++) |
60 |
if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
62 |
case 's': |
63 |
maxval = atoi(argv[++i]) & 0xffff; |
64 |
break; |
65 |
case 'b': |
66 |
gryflag = 1; |
67 |
break; |
68 |
case 'g': |
69 |
gamcor = atof(argv[++i]); |
70 |
break; |
71 |
case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
73 |
goto userr; |
74 |
bradj = atoi(argv[++i]); |
75 |
break; |
76 |
case 'a': |
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binflag = 0; |
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break; |
79 |
case 'r': |
80 |
reverse = !reverse; |
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break; |
82 |
default: |
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goto userr; |
84 |
} |
85 |
else |
86 |
break; |
87 |
|
88 |
if (i < argc-2) |
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goto userr; |
90 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
91 |
fprintf(stderr, "%s: can't open input \"%s\"\n", |
92 |
progname, argv[i]); |
93 |
exit(1); |
94 |
} |
95 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
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fprintf(stderr, "%s: can't open output \"%s\"\n", |
97 |
progname, argv[i+1]); |
98 |
exit(1); |
99 |
} |
100 |
if (maxval < 256) |
101 |
setcolrgam(gamcor); |
102 |
if (reverse) { |
103 |
/* get header */ |
104 |
if (read(fileno(stdin), inpbuf, 2) != 2 || inpbuf[0] != 'P') |
105 |
quiterr("input not a Poskanzer Pixmap"); |
106 |
ptype = inpbuf[1]; |
107 |
#ifdef MSDOS |
108 |
if (ptype > 4) |
109 |
setmode(fileno(stdin), O_BINARY); |
110 |
setmode(fileno(stdout), O_BINARY); |
111 |
#endif |
112 |
xmax = scanint(stdin); |
113 |
ymax = scanint(stdin); |
114 |
maxval = scanint(stdin); |
115 |
/* put header */ |
116 |
newheader("RADIANCE", stdout); |
117 |
printargs(i, argv, stdout); |
118 |
fputformat(COLRFMT, stdout); |
119 |
putchar('\n'); |
120 |
fprtresolu(xmax, ymax, stdout); |
121 |
/* convert file */ |
122 |
if (maxval >= 256) |
123 |
switch (ptype) { |
124 |
case '2': |
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ppm2ra2(agryscan2); |
126 |
break; |
127 |
case '5': |
128 |
ppm2ra2(bgryscan2); |
129 |
break; |
130 |
case '3': |
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ppm2ra2(aclrscan2); |
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break; |
133 |
case '6': |
134 |
ppm2ra2(bclrscan2); |
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break; |
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default: |
137 |
quiterr("unsupported Pixmap type"); |
138 |
} |
139 |
else |
140 |
switch (ptype) { |
141 |
case '2': |
142 |
ppm2ra(agryscan); |
143 |
break; |
144 |
case '5': |
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ppm2ra(bgryscan); |
146 |
break; |
147 |
case '3': |
148 |
ppm2ra(aclrscan); |
149 |
break; |
150 |
case '6': |
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ppm2ra(bclrscan); |
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break; |
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default: |
154 |
quiterr("unsupported Pixmap type"); |
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} |
156 |
} else { |
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#ifdef MSDOS |
158 |
setmode(fileno(stdin), O_BINARY); |
159 |
if (binflag) |
160 |
setmode(fileno(stdout), O_BINARY); |
161 |
#endif |
162 |
/* get header info. */ |
163 |
if (checkheader(stdin, COLRFMT, NULL) < 0 || |
164 |
fgetresolu(&xmax, &ymax, stdin) < 0) |
165 |
quiterr("bad picture format"); |
166 |
/* write PPM header */ |
167 |
printf("P%1d\n%d %d\n%u\n", (gryflag?2:3)+(binflag?3:0), |
168 |
xmax, ymax, maxval); |
169 |
/* convert file */ |
170 |
if (maxval >= 256) |
171 |
ra2ppm2(binflag, gryflag); |
172 |
else |
173 |
ra2ppm(binflag, gryflag); |
174 |
} |
175 |
exit(0); |
176 |
userr: |
177 |
fprintf(stderr, |
178 |
"Usage: %s [-r][-a][-b][-s maxv][-g gamma][-e +/-stops] [input [output]]\n", |
179 |
progname); |
180 |
exit(1); |
181 |
} |
182 |
|
183 |
|
184 |
quiterr(err) /* print message and exit */ |
185 |
char *err; |
186 |
{ |
187 |
if (err != NULL) { |
188 |
fprintf(stderr, "%s: %s\n", progname, err); |
189 |
exit(1); |
190 |
} |
191 |
exit(0); |
192 |
} |
193 |
|
194 |
|
195 |
ppm2ra(getscan) /* convert 1-byte Pixmap to Radiance picture */ |
196 |
int (*getscan)(); |
197 |
{ |
198 |
COLR *scanout; |
199 |
int y; |
200 |
/* allocate scanline */ |
201 |
scanout = (COLR *)malloc(xmax*sizeof(COLR)); |
202 |
if (scanout == NULL) |
203 |
quiterr("out of memory in ppm2ra"); |
204 |
/* convert image */ |
205 |
for (y = ymax-1; y >= 0; y--) { |
206 |
if ((*getscan)(scanout, xmax, stdin) < 0) |
207 |
quiterr("error reading Pixmap"); |
208 |
gambs_colrs(scanout, xmax); |
209 |
if (bradj) |
210 |
shiftcolrs(scanout, xmax, bradj); |
211 |
if (fwritecolrs(scanout, xmax, stdout) < 0) |
212 |
quiterr("error writing Radiance picture"); |
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} |
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/* free scanline */ |
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free((char *)scanout); |
216 |
} |
217 |
|
218 |
|
219 |
ra2ppm(binary, grey) /* convert Radiance picture to Pixmap */ |
220 |
int binary, grey; |
221 |
{ |
222 |
COLR *scanin; |
223 |
register int x; |
224 |
int y; |
225 |
/* allocate scanline */ |
226 |
scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
227 |
if (scanin == NULL) |
228 |
quiterr("out of memory in ra2ppm"); |
229 |
/* convert image */ |
230 |
for (y = ymax-1; y >= 0; y--) { |
231 |
if (freadcolrs(scanin, xmax, stdin) < 0) |
232 |
quiterr("error reading Radiance picture"); |
233 |
if (bradj) |
234 |
shiftcolrs(scanin, xmax, bradj); |
235 |
for (x = grey?xmax:0; x--; ) |
236 |
scanin[x][GRN] = normbright(scanin[x]); |
237 |
colrs_gambs(scanin, xmax); |
238 |
if (grey) |
239 |
if (binary) |
240 |
for (x = 0; x < xmax; x++) |
241 |
putc(scanin[x][GRN], stdout); |
242 |
else |
243 |
for (x = 0; x < xmax; x++) |
244 |
printf("%d\n", scanin[x][GRN]); |
245 |
else |
246 |
if (binary) |
247 |
for (x = 0; x < xmax; x++) { |
248 |
putc(scanin[x][RED], stdout); |
249 |
putc(scanin[x][GRN], stdout); |
250 |
putc(scanin[x][BLU], stdout); |
251 |
} |
252 |
else |
253 |
for (x = 0; x < xmax; x++) |
254 |
printf("%d %d %d\n", scanin[x][RED], |
255 |
scanin[x][GRN], |
256 |
scanin[x][BLU]); |
257 |
if (ferror(stdout)) |
258 |
quiterr("error writing Pixmap"); |
259 |
} |
260 |
/* free scanline */ |
261 |
free((char *)scanin); |
262 |
} |
263 |
|
264 |
|
265 |
ppm2ra2(getscan) /* convert 2-byte Pixmap to Radiance picture */ |
266 |
int (*getscan)(); |
267 |
{ |
268 |
COLOR *scanout; |
269 |
double mult; |
270 |
int y; |
271 |
register int x; |
272 |
/* allocate scanline */ |
273 |
scanout = (COLOR *)malloc(xmax*sizeof(COLOR)); |
274 |
if (scanout == NULL) |
275 |
quiterr("out of memory in ppm2ra2"); |
276 |
if (bradj) |
277 |
mult = pow(2., (double)bradj); |
278 |
/* convert image */ |
279 |
for (y = ymax-1; y >= 0; y--) { |
280 |
if ((*getscan)(scanout, xmax, stdin) < 0) |
281 |
quiterr("error reading Pixmap"); |
282 |
for (x = gamcor>1.01|gamcor<0.99?xmax:0; x--; ) { |
283 |
colval(scanout[x],RED) = |
284 |
pow(colval(scanout[x],RED), gamcor); |
285 |
colval(scanout[x],GRN) = |
286 |
pow(colval(scanout[x],GRN), gamcor); |
287 |
colval(scanout[x],BLU) = |
288 |
pow(colval(scanout[x],BLU), gamcor); |
289 |
} |
290 |
for (x = bradj?xmax:0; x--; ) |
291 |
scalecolor(scanout[x], mult); |
292 |
if (fwritescan(scanout, xmax, stdout) < 0) |
293 |
quiterr("error writing Radiance picture"); |
294 |
} |
295 |
/* free scanline */ |
296 |
free((char *)scanout); |
297 |
} |
298 |
|
299 |
|
300 |
ra2ppm2(binary, grey) /* convert Radiance picture to Pixmap (2-byte) */ |
301 |
int binary, grey; |
302 |
{ |
303 |
COLOR *scanin; |
304 |
double mult, d; |
305 |
register int x; |
306 |
int y; |
307 |
/* allocate scanline */ |
308 |
scanin = (COLOR *)malloc(xmax*sizeof(COLOR)); |
309 |
if (scanin == NULL) |
310 |
quiterr("out of memory in ra2ppm2"); |
311 |
if (bradj) |
312 |
mult = pow(2., (double)bradj); |
313 |
/* convert image */ |
314 |
for (y = ymax-1; y >= 0; y--) { |
315 |
if (freadscan(scanin, xmax, stdin) < 0) |
316 |
quiterr("error reading Radiance picture"); |
317 |
for (x = bradj?xmax:0; x--; ) |
318 |
scalecolor(scanin[x], mult); |
319 |
for (x = grey?xmax:0; x--; ) |
320 |
colval(scanin[x],GRN) = bright(scanin[x]); |
321 |
d = 1./gamcor; |
322 |
for (x = d>1.01|d<0.99?xmax:0; x--; ) { |
323 |
colval(scanin[x],GRN) = pow(colval(scanin[x],GRN), d); |
324 |
if (!grey) { |
325 |
colval(scanin[x],RED) = |
326 |
pow(colval(scanin[x],RED), d); |
327 |
colval(scanin[x],BLU) = |
328 |
pow(colval(scanin[x],BLU), d); |
329 |
} |
330 |
} |
331 |
if (grey) |
332 |
if (binary) |
333 |
for (x = 0; x < xmax; x++) |
334 |
putby2(intv(colval(scanin[x],GRN)), |
335 |
stdout); |
336 |
else |
337 |
for (x = 0; x < xmax; x++) |
338 |
printf("%u\n", |
339 |
intv(colval(scanin[x],GRN))); |
340 |
else |
341 |
if (binary) |
342 |
for (x = 0; x < xmax; x++) { |
343 |
putby2(intv(colval(scanin[x],RED)), |
344 |
stdout); |
345 |
putby2(intv(colval(scanin[x],GRN)), |
346 |
stdout); |
347 |
putby2(intv(colval(scanin[x],BLU)), |
348 |
stdout); |
349 |
} |
350 |
else |
351 |
for (x = 0; x < xmax; x++) |
352 |
printf("%u %u %u\n", |
353 |
intv(colval(scanin[x],RED)), |
354 |
intv(colval(scanin[x],GRN)), |
355 |
intv(colval(scanin[x],BLU))); |
356 |
if (ferror(stdout)) |
357 |
quiterr("error writing Pixmap"); |
358 |
} |
359 |
/* free scanline */ |
360 |
free((char *)scanin); |
361 |
} |
362 |
|
363 |
|
364 |
agryscan(scan, len, fp) /* get an ASCII greyscale scanline */ |
365 |
register COLR *scan; |
366 |
register int len; |
367 |
FILE *fp; |
368 |
{ |
369 |
while (len-- > 0) { |
370 |
scan[0][RED] = |
371 |
scan[0][GRN] = |
372 |
scan[0][BLU] = normval(scanint(fp)); |
373 |
scan++; |
374 |
} |
375 |
return(0); |
376 |
} |
377 |
|
378 |
|
379 |
bgryscan(scan, len, fp) /* get a binary greyscale scanline */ |
380 |
register COLR *scan; |
381 |
int len; |
382 |
register FILE *fp; |
383 |
{ |
384 |
register int c; |
385 |
|
386 |
while (len-- > 0) { |
387 |
if ((c = getc(fp)) == EOF) |
388 |
return(-1); |
389 |
if (maxval != 255) |
390 |
c = normval(c); |
391 |
scan[0][RED] = |
392 |
scan[0][GRN] = |
393 |
scan[0][BLU] = c; |
394 |
scan++; |
395 |
} |
396 |
return(0); |
397 |
} |
398 |
|
399 |
|
400 |
aclrscan(scan, len, fp) /* get an ASCII color scanline */ |
401 |
register COLR *scan; |
402 |
register int len; |
403 |
FILE *fp; |
404 |
{ |
405 |
while (len-- > 0) { |
406 |
scan[0][RED] = normval(scanint(fp)); |
407 |
scan[0][GRN] = normval(scanint(fp)); |
408 |
scan[0][BLU] = normval(scanint(fp)); |
409 |
scan++; |
410 |
} |
411 |
return(0); |
412 |
} |
413 |
|
414 |
|
415 |
bclrscan(scan, len, fp) /* get a binary color scanline */ |
416 |
register COLR *scan; |
417 |
int len; |
418 |
register FILE *fp; |
419 |
{ |
420 |
int r, g, b; |
421 |
|
422 |
while (len-- > 0) { |
423 |
r = getc(fp); |
424 |
g = getc(fp); |
425 |
if ((b = getc(fp)) == EOF) |
426 |
return(-1); |
427 |
if (maxval == 255) { |
428 |
scan[0][RED] = r; |
429 |
scan[0][GRN] = g; |
430 |
scan[0][BLU] = b; |
431 |
} else { |
432 |
scan[0][RED] = normval(r); |
433 |
scan[0][GRN] = normval(g); |
434 |
scan[0][BLU] = normval(b); |
435 |
} |
436 |
scan++; |
437 |
} |
438 |
return(0); |
439 |
} |
440 |
|
441 |
|
442 |
agryscan2(scan, len, fp) /* get an ASCII greyscale scanline */ |
443 |
register COLOR *scan; |
444 |
register int len; |
445 |
FILE *fp; |
446 |
{ |
447 |
while (len-- > 0) { |
448 |
colval(scan[0],RED) = |
449 |
colval(scan[0],GRN) = |
450 |
colval(scan[0],BLU) = fltv(scanint(fp)); |
451 |
scan++; |
452 |
} |
453 |
return(0); |
454 |
} |
455 |
|
456 |
|
457 |
bgryscan2(scan, len, fp) /* get a binary greyscale scanline */ |
458 |
register COLOR *scan; |
459 |
int len; |
460 |
register FILE *fp; |
461 |
{ |
462 |
register int c; |
463 |
|
464 |
while (len-- > 0) { |
465 |
if ((c = getby2(fp)) == EOF) |
466 |
return(-1); |
467 |
colval(scan[0],RED) = |
468 |
colval(scan[0],GRN) = |
469 |
colval(scan[0],BLU) = fltv(c); |
470 |
scan++; |
471 |
} |
472 |
return(0); |
473 |
} |
474 |
|
475 |
|
476 |
aclrscan2(scan, len, fp) /* get an ASCII color scanline */ |
477 |
register COLOR *scan; |
478 |
register int len; |
479 |
FILE *fp; |
480 |
{ |
481 |
while (len-- > 0) { |
482 |
colval(scan[0],RED) = fltv(scanint(fp)); |
483 |
colval(scan[0],GRN) = fltv(scanint(fp)); |
484 |
colval(scan[0],BLU) = fltv(scanint(fp)); |
485 |
scan++; |
486 |
} |
487 |
return(0); |
488 |
} |
489 |
|
490 |
|
491 |
bclrscan2(scan, len, fp) /* get a binary color scanline */ |
492 |
register COLOR *scan; |
493 |
int len; |
494 |
register FILE *fp; |
495 |
{ |
496 |
int r, g, b; |
497 |
|
498 |
while (len-- > 0) { |
499 |
r = getby2(fp); |
500 |
g = getby2(fp); |
501 |
if ((b = getby2(fp)) == EOF) |
502 |
return(-1); |
503 |
scan[0][RED] = fltv(r); |
504 |
scan[0][GRN] = fltv(g); |
505 |
scan[0][BLU] = fltv(b); |
506 |
scan++; |
507 |
} |
508 |
return(0); |
509 |
} |
510 |
|
511 |
|
512 |
unsigned int |
513 |
scanint(fp) /* scan the next positive integer value */ |
514 |
register FILE *fp; |
515 |
{ |
516 |
register int c; |
517 |
register unsigned int i; |
518 |
tryagain: |
519 |
while (isspace(c = getc(fp))) |
520 |
; |
521 |
if (c == EOF) |
522 |
quiterr("unexpected end of file"); |
523 |
if (c == '#') { /* comment */ |
524 |
while ((c = getc(fp)) != EOF && c != '\n') |
525 |
; |
526 |
goto tryagain; |
527 |
} |
528 |
/* should be integer */ |
529 |
i = 0; |
530 |
do { |
531 |
if (!isdigit(c)) |
532 |
quiterr("error reading integer"); |
533 |
i = 10*i + c - '0'; |
534 |
c = getc(fp); |
535 |
} while (c != EOF && !isspace(c)); |
536 |
return(i); |
537 |
} |
538 |
|
539 |
|
540 |
int |
541 |
normval(v) /* normalize a value to [0,255] */ |
542 |
register unsigned int v; |
543 |
{ |
544 |
if (v >= maxval) |
545 |
return(255); |
546 |
if (maxval == 255) |
547 |
return(v); |
548 |
return(v*255L/maxval); |
549 |
} |
550 |
|
551 |
|
552 |
unsigned int |
553 |
getby2(fp) /* return 2-byte quantity from fp */ |
554 |
register FILE *fp; |
555 |
{ |
556 |
register int lowerb, upperb; |
557 |
|
558 |
lowerb = getc(fp); |
559 |
upperb = getc(fp); |
560 |
if (upperb == EOF) |
561 |
return(EOF); |
562 |
return(upperb<<8 | lowerb); |
563 |
} |
564 |
|
565 |
|
566 |
putby2(w, fp) /* put 2-byte quantity to fp */ |
567 |
register unsigned int w; |
568 |
register FILE *fp; |
569 |
{ |
570 |
putc(w & 0xff, fp); |
571 |
putc(w>>8 & 0xff, fp); |
572 |
if (ferror(fp)) { |
573 |
fprintf(stderr, "%s: write error on PPM output\n", progname); |
574 |
exit(1); |
575 |
} |
576 |
} |
577 |
|
578 |
|
579 |
unsigned int |
580 |
intv(v) /* return integer quantity for v */ |
581 |
register double v; |
582 |
{ |
583 |
if (v >= 0.99999) |
584 |
return(maxval); |
585 |
if (v <= 0.) |
586 |
return(0); |
587 |
return((int)(v*(maxval+1))); |
588 |
} |