1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: ra_ps.c,v 2.24 2003/02/22 02:07:28 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Radiance picture to PostScript file translator -- one way! |
6 |
*/ |
7 |
|
8 |
#include <stdio.h> |
9 |
#include <math.h> |
10 |
#include <ctype.h> |
11 |
|
12 |
#include "platform.h" |
13 |
#include "color.h" |
14 |
|
15 |
#define UPPER(c) ((c)&~0x20) /* ASCII trick */ |
16 |
|
17 |
#define CODE6GAM 1.47 /* gamma for 6-bit codes */ |
18 |
#define DEFGGAM 1.0 /* greyscale device gamma */ |
19 |
#define DEFCGAM 1.8 /* color device gamma */ |
20 |
|
21 |
#define GRY -1 /* artificial index for grey */ |
22 |
|
23 |
#define DEFMARG 0.5 /* default margin (inches) */ |
24 |
#define DEFWIDTH 8.5 /* default page width */ |
25 |
#define DEFHEIGHT 11 /* default page height */ |
26 |
#define HMARGIN (hmarg*72) /* horizontal margin */ |
27 |
#define VMARGIN (vmarg*72) /* vertical margin */ |
28 |
#define PWIDTH (width*72-2*HMARGIN) /* width of device */ |
29 |
#define PHEIGHT (height*72-2*VMARGIN) /* height of device */ |
30 |
|
31 |
#define RUNCHR '*' /* character to start rle */ |
32 |
#define MINRUN 4 /* minimum run-length */ |
33 |
#define RSTRT '!' /* character for MINRUN */ |
34 |
#define MAXRUN (MINRUN+'~'-RSTRT) /* maximum run-length */ |
35 |
|
36 |
char code[] = /* 6-bit code lookup table */ |
37 |
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@+"; |
38 |
|
39 |
int wrongformat = 0; /* input in wrong format? */ |
40 |
double pixaspect = 1.0; /* pixel aspect ratio */ |
41 |
|
42 |
double devgam = 0.; /* device gamma response */ |
43 |
double hmarg = DEFMARG, |
44 |
vmarg = DEFMARG; /* horizontal and vertical margins */ |
45 |
double width = DEFWIDTH, |
46 |
height = DEFHEIGHT; /* default paper width and height */ |
47 |
double dpi = 0; /* print density (0 if unknown) */ |
48 |
int docolor = 1; /* produce color image? */ |
49 |
int bradj = 0; /* brightness adjustment */ |
50 |
int ncopies = 1; /* number of copies */ |
51 |
|
52 |
extern int Aputprim(), Bputprim(), Cputprim(); |
53 |
|
54 |
int (*putprim)() = Aputprim; /* function for writing scanline */ |
55 |
|
56 |
char *progname; |
57 |
|
58 |
int xmax, ymax; /* input image dimensions */ |
59 |
|
60 |
extern double unit2inch(); |
61 |
|
62 |
|
63 |
int |
64 |
headline(s) /* check header line */ |
65 |
char *s; |
66 |
{ |
67 |
char fmt[32]; |
68 |
|
69 |
if (isformat(s)) { |
70 |
formatval(fmt, s); |
71 |
wrongformat = strcmp(fmt, COLRFMT); |
72 |
} else if (isaspect(s)) |
73 |
pixaspect *= aspectval(s); |
74 |
return(0); |
75 |
} |
76 |
|
77 |
|
78 |
main(argc, argv) |
79 |
int argc; |
80 |
char *argv[]; |
81 |
{ |
82 |
int i; |
83 |
double d; |
84 |
|
85 |
progname = argv[0]; |
86 |
|
87 |
for (i = 1; i < argc; i++) |
88 |
if (argv[i][0] == '-') |
89 |
switch (argv[i][1]) { |
90 |
case 'b': /* produce b&w PostScript */ |
91 |
docolor = 0; |
92 |
break; |
93 |
case 'c': /* produce color PostScript */ |
94 |
docolor = 1; |
95 |
break; |
96 |
case 'A': /* standard ASCII encoding */ |
97 |
putprim = Aputprim; |
98 |
break; |
99 |
case 'B': /* standard binary encoding */ |
100 |
putprim = Bputprim; |
101 |
break; |
102 |
case 'C': /* compressed ASCII encoding */ |
103 |
putprim = Cputprim; |
104 |
break; |
105 |
case 'd': /* print density */ |
106 |
dpi = atof(argv[++i]); |
107 |
break; |
108 |
case 'g': /* device gamma adjustment */ |
109 |
devgam = atof(argv[++i]); |
110 |
break; |
111 |
case 'p': /* paper size */ |
112 |
parsepaper(argv[++i]); |
113 |
break; |
114 |
case 'm': /* margin */ |
115 |
d = atof(argv[i+1]); |
116 |
d *= unit2inch(argv[i+1]); |
117 |
switch (argv[i][2]) { |
118 |
case '\0': |
119 |
hmarg = vmarg = d; |
120 |
break; |
121 |
case 'h': |
122 |
hmarg = d; |
123 |
break; |
124 |
case 'v': |
125 |
vmarg = d; |
126 |
break; |
127 |
default: |
128 |
goto userr; |
129 |
} |
130 |
i++; |
131 |
break; |
132 |
case 'e': /* exposure adjustment */ |
133 |
if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
134 |
goto userr; |
135 |
bradj = atoi(argv[++i]); |
136 |
break; |
137 |
case 'n': /* number of copies */ |
138 |
ncopies = atoi(argv[++i]); |
139 |
break; |
140 |
default: |
141 |
goto userr; |
142 |
} |
143 |
else |
144 |
break; |
145 |
|
146 |
if (i < argc-2) |
147 |
goto userr; |
148 |
if (i <= argc-1 && freopen(argv[i], "r", stdin) == NULL) { |
149 |
fprintf(stderr, "%s: can't open input \"%s\"\n", |
150 |
progname, argv[i]); |
151 |
exit(1); |
152 |
} |
153 |
if (i == argc-2 && freopen(argv[i+1], "w", stdout) == NULL) { |
154 |
fprintf(stderr, "%s: can't open output \"%s\"\n", |
155 |
progname, argv[i+1]); |
156 |
exit(1); |
157 |
} |
158 |
SET_FILE_BINARY(stdin); |
159 |
/* get our header */ |
160 |
getheader(stdin, headline, NULL); |
161 |
if (wrongformat || fgetresolu(&xmax, &ymax, stdin) < 0) |
162 |
quiterr("bad picture format"); |
163 |
/* gamma compression */ |
164 |
if (devgam <= 0.05) |
165 |
devgam = docolor ? DEFCGAM : DEFGGAM; |
166 |
if (putprim == Cputprim) |
167 |
setcolrgam(CODE6GAM); |
168 |
else if (devgam != 1.) |
169 |
setcolrgam(devgam); |
170 |
/* write header */ |
171 |
PSheader(argc, argv); |
172 |
/* convert file */ |
173 |
ra2ps(); |
174 |
/* write trailer */ |
175 |
PStrailer(); |
176 |
exit(0); |
177 |
userr: |
178 |
fprintf(stderr, |
179 |
"Usage: %s [-b|c][-A|B|C][-e +/-stops][-p paper][-m[h|v] margin][-d dpi][-g gamma] [input [output]]\n", |
180 |
progname); |
181 |
exit(1); |
182 |
} |
183 |
|
184 |
|
185 |
double |
186 |
unit2inch(s) /* determine unit */ |
187 |
register char *s; |
188 |
{ |
189 |
static struct unit {char n; float f;} u[] = { |
190 |
'i', 1., |
191 |
'm', 1./25.4, |
192 |
'c', 1./2.54, |
193 |
'\0' }; |
194 |
register struct unit *up; |
195 |
|
196 |
while (*s && !isalpha(*s)) |
197 |
s++; |
198 |
for (up = u; up->n; up++) |
199 |
if (up->n == *s) |
200 |
return(up->f); |
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return(1.); |
202 |
} |
203 |
|
204 |
|
205 |
int |
206 |
matchid(name, id) /* see if name matches id (case insensitive) */ |
207 |
char *name; |
208 |
register char *id; |
209 |
{ |
210 |
register char *s = name; |
211 |
|
212 |
while (*s) { |
213 |
if (isalpha(*s)) { |
214 |
if (!isalpha(*id) || UPPER(*s) != UPPER(*id)) |
215 |
return(0); |
216 |
} else if (*s != *id) |
217 |
return(0); |
218 |
s++; id++; |
219 |
} |
220 |
return(!*id || s-name >= 3); /* substrings >= 3 chars OK */ |
221 |
} |
222 |
|
223 |
|
224 |
parsepaper(ps) /* determine paper size from name */ |
225 |
char *ps; |
226 |
{ |
227 |
static struct psize {char n[12]; float w,h;} p[] = { |
228 |
"envelope", 4.12, 9.5, |
229 |
"executive", 7.25, 10.5, |
230 |
"letter", 8.5, 11., |
231 |
"lettersmall", 7.68, 10.16, |
232 |
"legal", 8.5, 14., |
233 |
"monarch", 3.87, 7.5, |
234 |
"statement", 5.5, 8.5, |
235 |
"tabloid", 11., 17., |
236 |
"A3", 11.69, 16.54, |
237 |
"A4", 8.27, 11.69, |
238 |
"A4small", 7.47, 10.85, |
239 |
"A5", 6.00, 8.27, |
240 |
"A6", 4.13, 6.00, |
241 |
"B4", 10.12, 14.33, |
242 |
"B5", 7.17, 10.12, |
243 |
"C5", 6.38, 9.01, |
244 |
"C6", 4.49, 6.38, |
245 |
"DL", 4.33, 8.66, |
246 |
"hagaki", 3.94, 5.83, |
247 |
"" }; |
248 |
register struct psize *pp; |
249 |
register char *s = ps; |
250 |
double d; |
251 |
|
252 |
if (isdigit(*s)) { /* check for WWxHH specification */ |
253 |
width = atof(s); |
254 |
while (*s && !isalpha(*s)) |
255 |
s++; |
256 |
d = unit2inch(s); |
257 |
height = atof(++s); |
258 |
width *= d; |
259 |
height *= d; |
260 |
if (width >= 1. & height >= 1.) |
261 |
return; |
262 |
} else /* check for match to standard size */ |
263 |
for (pp = p; pp->n[0]; pp++) |
264 |
if (matchid(s, pp->n)) { |
265 |
width = pp->w; |
266 |
height = pp->h; |
267 |
return; |
268 |
} |
269 |
fprintf(stderr, "%s: unknown paper size \"%s\" -- known sizes:\n", |
270 |
progname, ps); |
271 |
fprintf(stderr, "_Name________Width_Height_(inches)\n"); |
272 |
for (pp = p; pp->n[0]; pp++) |
273 |
fprintf(stderr, "%-11s %5.2f %5.2f\n", pp->n, pp->w, pp->h); |
274 |
fprintf(stderr, "Or use WWxHH size specification\n"); |
275 |
exit(1); |
276 |
} |
277 |
|
278 |
|
279 |
quiterr(err) /* print message and exit */ |
280 |
char *err; |
281 |
{ |
282 |
if (err != NULL) { |
283 |
fprintf(stderr, "%s: %s\n", progname, err); |
284 |
exit(1); |
285 |
} |
286 |
exit(0); |
287 |
} |
288 |
|
289 |
|
290 |
PSheader(ac, av) /* print PostScript header */ |
291 |
int ac; |
292 |
char **av; |
293 |
{ |
294 |
char *rstr; |
295 |
int landscape, rotate, n; |
296 |
double pwidth, pheight; |
297 |
double iwidth, iheight; |
298 |
/* EPS comments */ |
299 |
puts("%!PS-Adobe-2.0 EPSF-2.0"); |
300 |
printf("%%%%Title: "); printargs(ac, av, stdout); |
301 |
printf("%%%%Creator: %s\n", progname); |
302 |
printf("%%%%Pages: %d\n", ncopies); |
303 |
if (landscape = xmax > pixaspect*ymax) |
304 |
puts("%%Orientation: Landscape"); |
305 |
else |
306 |
puts("%%Orientation: Portrait"); |
307 |
if (rotate = PWIDTH > PHEIGHT ^ landscape) { |
308 |
pwidth = PHEIGHT; |
309 |
pheight = PWIDTH; |
310 |
} else { |
311 |
pwidth = PWIDTH; |
312 |
pheight = PHEIGHT; |
313 |
} |
314 |
if (dpi > 100 && pixaspect >= 0.99 & pixaspect <= 1.01) |
315 |
if (pheight/pwidth > ymax/xmax) { |
316 |
n = pwidth*dpi/xmax; /* floor */ |
317 |
iwidth = n > 0 ? (double)(n*xmax)/dpi : pwidth; |
318 |
iheight = iwidth*ymax/xmax; |
319 |
} else { |
320 |
n = pheight*dpi/ymax; /* floor */ |
321 |
iheight = n > 0 ? (double)(n*ymax)/dpi : pheight; |
322 |
iwidth = iheight*xmax/ymax; |
323 |
} |
324 |
else |
325 |
if (pheight/pwidth > pixaspect*ymax/xmax) { |
326 |
iwidth = pwidth; |
327 |
iheight = iwidth*pixaspect*ymax/xmax; |
328 |
} else { |
329 |
iheight = pheight; |
330 |
iwidth = iheight*xmax/(pixaspect*ymax); |
331 |
} |
332 |
if (rotate) |
333 |
printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n", |
334 |
HMARGIN+(pheight-iheight)*.5, |
335 |
VMARGIN+(pwidth-iwidth)*.5, |
336 |
HMARGIN+(pheight-iheight)*.5+iheight, |
337 |
VMARGIN+(pwidth-iwidth)*.5+iwidth); |
338 |
else |
339 |
printf("%%%%BoundingBox: %.0f %.0f %.0f %.0f\n", |
340 |
HMARGIN+(pwidth-iwidth)*.5, |
341 |
VMARGIN+(pheight-iheight)*.5, |
342 |
HMARGIN+(pwidth-iwidth)*.5+iwidth, |
343 |
VMARGIN+(pheight-iheight)*.5+iheight); |
344 |
puts("%%EndComments"); |
345 |
puts("gsave save"); |
346 |
puts("17 dict begin"); |
347 |
/* define image reader */ |
348 |
if (docolor) { |
349 |
printf("/redline %d string def\n", xmax); |
350 |
printf("/grnline %d string def\n", xmax); |
351 |
printf("/bluline %d string def\n", xmax); |
352 |
} else |
353 |
printf("/gryline %d string def\n", xmax); |
354 |
/* use compressed encoding? */ |
355 |
if (putprim == Cputprim) |
356 |
PSprocdef("read6bitRLE"); |
357 |
/* set up transformation matrix */ |
358 |
printf("%f %f translate\n", HMARGIN, VMARGIN); |
359 |
if (rotate) { |
360 |
printf("%f 0 translate\n", PWIDTH); |
361 |
puts("90 rotate"); |
362 |
} |
363 |
printf("%f %f translate\n", (pwidth-iwidth)*.5, (pheight-iheight)*.5); |
364 |
printf("%f %f scale\n", iwidth, iheight); |
365 |
puts("%%EndProlog"); |
366 |
/* start image procedure */ |
367 |
printf("%d %d 8 [%d 0 0 %d 0 %d]\n", xmax, ymax, xmax, -ymax, ymax); |
368 |
if (putprim == Cputprim) { |
369 |
if (docolor) { |
370 |
puts("{redline read6bitRLE}"); |
371 |
puts("{grnline read6bitRLE}"); |
372 |
puts("{bluline read6bitRLE}"); |
373 |
puts("true 3 colorimage"); |
374 |
} else |
375 |
puts("{gryline read6bitRLE} image"); |
376 |
} else { |
377 |
rstr = putprim==Aputprim ? "readhexstring" : "readstring"; |
378 |
if (docolor) { |
379 |
printf("{currentfile redline %s pop}\n", rstr); |
380 |
printf("{currentfile grnline %s pop}\n", rstr); |
381 |
printf("{currentfile bluline %s pop}\n", rstr); |
382 |
puts("true 3 colorimage"); |
383 |
} else |
384 |
printf("{currentfile gryline %s pop} image\n", rstr); |
385 |
} |
386 |
} |
387 |
|
388 |
|
389 |
PStrailer() /* print PostScript trailer */ |
390 |
{ |
391 |
puts("%%Trailer"); |
392 |
if (ncopies > 1) |
393 |
printf("/#copies %d def\n", ncopies); |
394 |
puts("showpage"); |
395 |
puts("end"); |
396 |
puts("restore grestore"); |
397 |
puts("%%EOF"); |
398 |
} |
399 |
|
400 |
|
401 |
PSprocdef(nam) /* define PS procedure to read image */ |
402 |
char *nam; |
403 |
{ |
404 |
short itab[128]; |
405 |
register int i; |
406 |
/* assign code values */ |
407 |
for (i = 0; i < 128; i++) /* clear */ |
408 |
itab[i] = -1; |
409 |
for (i = 1; i < 63; i++) /* assign greys */ |
410 |
itab[code[i]] = 256.0*pow((i+.5)/64.0, CODE6GAM/devgam); |
411 |
itab[code[0]] = 0; /* black is black */ |
412 |
itab[code[63]] = 255; /* and white is white */ |
413 |
printf("/codetab ["); |
414 |
for (i = 0; i < 128; i++) { |
415 |
if (!(i & 0xf)) |
416 |
putchar('\n'); |
417 |
printf(" %3d", itab[i]); |
418 |
} |
419 |
printf("\n] def\n"); |
420 |
printf("/nrept 0 def\n"); |
421 |
printf("/readbyte { currentfile read not {stop} if } bind def\n"); |
422 |
printf("/decode { codetab exch get } bind def\n"); |
423 |
printf("/%s {\t%% scanbuffer\n", nam); |
424 |
printf("\t/scanline exch def\n"); |
425 |
printf("\t{ 0 1 %d { scanline exch\n", xmax-1); |
426 |
printf("\t\tnrept 0 le\n"); |
427 |
printf("\t\t\t{ { readbyte dup %d eq\n", RUNCHR); |
428 |
printf("\t\t\t\t\t{ pop /nrept readbyte %d sub def\n", RSTRT-MINRUN+1); |
429 |
printf("\t\t\t\t\t\t/reptv readbyte decode def\n"); |
430 |
printf("\t\t\t\t\t\treptv exit }\n"); |
431 |
printf("\t\t\t\t\t{ decode dup 0 lt {pop} {exit} ifelse }\n"); |
432 |
printf("\t\t\t\tifelse } loop }\n"); |
433 |
printf("\t\t\t{ /nrept nrept 1 sub def reptv }\n"); |
434 |
printf("\t\tifelse put\n"); |
435 |
printf("\t\t} for\n"); |
436 |
printf("\t} stopped {pop pop 0 string} {scanline} ifelse\n"); |
437 |
printf("} bind def\n"); |
438 |
} |
439 |
|
440 |
|
441 |
ra2ps() /* convert Radiance scanlines to 6-bit */ |
442 |
{ |
443 |
register COLR *scanin; |
444 |
int y; |
445 |
/* allocate scanline */ |
446 |
scanin = (COLR *)malloc(xmax*sizeof(COLR)); |
447 |
if (scanin == NULL) |
448 |
quiterr("out of memory in ra2ps"); |
449 |
/* convert image */ |
450 |
for (y = ymax-1; y >= 0; y--) { |
451 |
if (freadcolrs(scanin, xmax, stdin) < 0) |
452 |
quiterr("error reading Radiance picture"); |
453 |
if (putprim == Cputprim || devgam != 1.) { |
454 |
if (bradj) /* adjust exposure */ |
455 |
shiftcolrs(scanin, xmax, bradj); |
456 |
colrs_gambs(scanin, xmax); /* gamma compression */ |
457 |
} else |
458 |
normcolrs(scanin, xmax, bradj); |
459 |
if (docolor) { |
460 |
(*putprim)(scanin, RED); |
461 |
(*putprim)(scanin, GRN); |
462 |
(*putprim)(scanin, BLU); |
463 |
} else |
464 |
(*putprim)(scanin, GRY); |
465 |
if (ferror(stdout)) |
466 |
quiterr("error writing PostScript file"); |
467 |
} |
468 |
putchar('\n'); |
469 |
/* free scanline */ |
470 |
free((void *)scanin); |
471 |
} |
472 |
|
473 |
|
474 |
int |
475 |
Aputprim(scn, pri) /* put out hex ASCII primary from scanline */ |
476 |
COLR *scn; |
477 |
int pri; |
478 |
{ |
479 |
static char hexdigit[] = "0123456789ABCDEF"; |
480 |
static int col = 0; |
481 |
register int x, c; |
482 |
|
483 |
for (x = 0; x < xmax; x++) { |
484 |
if (pri == GRY) |
485 |
c = normbright(scn[x]); |
486 |
else |
487 |
c = scn[x][pri]; |
488 |
if (c > 255) c = 255; |
489 |
putchar(hexdigit[c>>4]); |
490 |
putchar(hexdigit[c&0xf]); |
491 |
if ((col += 2) >= 72) { |
492 |
putchar('\n'); |
493 |
col = 0; |
494 |
} |
495 |
} |
496 |
} |
497 |
|
498 |
|
499 |
int |
500 |
Bputprim(scn, pri) /* put out binary primary from scanline */ |
501 |
COLR *scn; |
502 |
int pri; |
503 |
{ |
504 |
register int x, c; |
505 |
|
506 |
for (x = 0; x < xmax; x++) { |
507 |
if (pri == GRY) |
508 |
c = normbright(scn[x]); |
509 |
else |
510 |
c = scn[x][pri]; |
511 |
if (c > 255) c = 255; |
512 |
putchar(c); |
513 |
} |
514 |
} |
515 |
|
516 |
|
517 |
int |
518 |
Cputprim(scn, pri) /* put out compressed primary from scanline */ |
519 |
COLR *scn; |
520 |
int pri; |
521 |
{ |
522 |
register int c; |
523 |
register int x; |
524 |
int lastc, cnt; |
525 |
|
526 |
lastc = -1; cnt = 0; |
527 |
for (x = 0; x < xmax; x++) { |
528 |
if (pri == GRY) |
529 |
c = normbright(scn[x]) + 2; |
530 |
else |
531 |
c = scn[x][pri] + 2; |
532 |
if (c > 255) c = 255; |
533 |
c = code[c>>2]; |
534 |
if (c == lastc && cnt < MAXRUN) |
535 |
cnt++; |
536 |
else { |
537 |
putrle(cnt, lastc); |
538 |
lastc = c; |
539 |
cnt = 1; |
540 |
} |
541 |
} |
542 |
putrle(cnt, lastc); |
543 |
} |
544 |
|
545 |
|
546 |
putrle(cnt, cod) /* put out cnt of cod */ |
547 |
register int cnt, cod; |
548 |
{ |
549 |
static int col = 0; |
550 |
|
551 |
if (cnt >= MINRUN) { |
552 |
col += 3; |
553 |
putchar(RUNCHR); |
554 |
putchar(RSTRT-MINRUN+cnt); |
555 |
putchar(cod); |
556 |
} else { |
557 |
col += cnt; |
558 |
while (cnt-- > 0) |
559 |
putchar(cod); |
560 |
} |
561 |
if (col >= 72) { |
562 |
putchar('\n'); |
563 |
col = 0; |
564 |
} |
565 |
} |