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root/radiance/ray/src/px/pfilt.c
Revision: 2.19
Committed: Wed Oct 2 16:56:16 1996 UTC (27 years, 6 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.18: +4 -4 lines
Log Message:
made output pixel positioning more precise

File Contents

# Content
1 /* Copyright (c) 1996 Regents of the University of California */
2
3 #ifndef lint
4 static char SCCSid[] = "$SunId$ LBL";
5 #endif
6
7 /*
8 * pfilt.c - program to post-process picture file.
9 *
10 * 9/26/85
11 * 6/23/93 Added additional buffers for value spreading
12 */
13
14 #include "standard.h"
15
16 #include <signal.h>
17
18 #include "color.h"
19
20 #include "view.h"
21
22 #include "resolu.h"
23
24 #include "paths.h"
25
26 extern float *matchlamp();
27
28 #define FEQ(a,b) ((a) >= .98*(b) && (a) <= 1.02*(b))
29
30 double CHECKRAD = 1.5; /* radius to check for filtering */
31
32 #define THRESHRAD 5.0 /* maximum sample spread in output */
33
34 COLOR exposure = WHTCOLOR; /* exposure for the frame */
35
36 double rad = 0.0; /* output pixel radius for filtering */
37
38 double thresh = 0.0; /* maximum contribution for subpixel */
39
40 int nrows = 0; /* number of rows for output */
41 int ncols = 0; /* number of columns for output */
42
43 double x_c = 1.0; /* ratio of output x size to input */
44 double y_r = 1.0; /* ratio of output y size to input */
45
46 int singlepass = 0; /* true means skip first pass */
47
48 int avghot = 0; /* true means average in bright spots */
49
50 double hotlvl = 100.0; /* level considered "hot" */
51
52 int npts = 0; /* (half) number of points for stars */
53
54 double spread = 1e-4; /* spread for star points */
55
56 char *tfname = NULL;
57
58 char template[] = TEMPLATE;
59
60 char *lampdat = "lamp.tab"; /* lamp data file */
61
62 int order; /* scanline ordering of input */
63 int xres, yres; /* resolution of input */
64 double inpaspect = 1.0; /* pixel aspect ratio of input */
65 int correctaspect = 0; /* aspect ratio correction? */
66
67 int wrongformat = 0;
68
69 VIEW ourview = STDVIEW;
70 int gotview = 0;
71 int wrapfilt = 0; /* wrap filter horizontally? */
72
73 int estatus = 0; /* exit status (for non-fatal errors) */
74
75 int xrad; /* x search radius */
76 int yrad; /* y search radius */
77 int xbrad; /* x box size */
78 int ybrad; /* y box size */
79
80 int barsize; /* size of input scan bar */
81 COLOR **scanin; /* input scan bar */
82 COLOR *scanout; /* output scan line */
83 COLOR **scoutbar; /* output scan bar (if thresh > 0) */
84 float **greybar; /* grey-averaged input values */
85 int obarsize = 0; /* size of output scan bar */
86 int orad = 0; /* output window radius */
87
88 char *progname;
89
90
91 main(argc, argv)
92 int argc;
93 char **argv;
94 {
95 extern long ftell();
96 extern int quit(), headline();
97 FILE *fin;
98 float *lampcolor;
99 char *lamptype = NULL;
100 long fpos;
101 double outaspect = 0.0;
102 double d;
103 int i, j;
104 #ifdef MSDOS
105 extern int _fmode;
106 _fmode = O_BINARY;
107 setmode(fileno(stdin), O_BINARY);
108 setmode(fileno(stdout), O_BINARY);
109 #endif
110 if (signal(SIGINT, quit) == SIG_IGN)
111 signal(SIGINT, SIG_IGN);
112 if (signal(SIGHUP, quit) == SIG_IGN)
113 signal(SIGHUP, SIG_IGN);
114 signal(SIGTERM, quit);
115 signal(SIGPIPE, quit);
116 #ifdef SIGXCPU
117 signal(SIGXCPU, quit);
118 signal(SIGXFSZ, quit);
119 #endif
120
121 progname = argv[0] = fixargv0(argv[0]);
122
123 for (i = 1; i < argc; i++)
124 if (argv[i][0] == '-')
125 switch (argv[i][1]) {
126 case 'x':
127 i++;
128 if (argv[i][0] == '/') {
129 x_c = 1.0/atof(argv[i]+1);
130 ncols = 0;
131 } else
132 ncols = atoi(argv[i]);
133 break;
134 case 'y':
135 i++;
136 if (argv[i][0] == '/') {
137 y_r = 1.0/atof(argv[i]+1);
138 nrows = 0;
139 } else
140 nrows = atoi(argv[i]);
141 break;
142 case 'c':
143 correctaspect = !correctaspect;
144 break;
145 case 'p':
146 i++;
147 outaspect = atof(argv[i]);
148 break;
149 case 'e':
150 if (argv[i+1][0] == '+' || argv[i+1][0] == '-')
151 d = pow(2.0, atof(argv[i+1]));
152 else
153 d = atof(argv[i+1]);
154 if (d < 1e-20 || d > 1e20) {
155 fprintf(stderr,
156 "%s: exposure out of range\n",
157 argv[0]);
158 quit(1);
159 }
160 switch (argv[i][2]) {
161 case '\0':
162 scalecolor(exposure, d);
163 break;
164 case 'r':
165 colval(exposure,RED) *= d;
166 break;
167 case 'g':
168 colval(exposure,GRN) *= d;
169 break;
170 case 'b':
171 colval(exposure,BLU) *= d;
172 break;
173 default:
174 goto badopt;
175 }
176 i++;
177 break;
178 case 'f':
179 lampdat = argv[++i];
180 break;
181 case 't':
182 lamptype = argv[++i];
183 break;
184 case '1':
185 singlepass = 1;
186 break;
187 case '2':
188 singlepass = 0;
189 break;
190 case 'n':
191 npts = atoi(argv[++i]) / 2;
192 break;
193 case 's':
194 spread = atof(argv[++i]);
195 break;
196 case 'a':
197 avghot = !avghot;
198 break;
199 case 'h':
200 hotlvl = atof(argv[++i]);
201 break;
202 case 'r':
203 rad = atof(argv[++i]);
204 break;
205 case 'm':
206 thresh = atof(argv[++i]);
207 if (rad <= FTINY)
208 rad = 1.0;
209 break;
210 case 'b':
211 rad = thresh = 0.0;
212 break;
213 default:;
214 badopt:
215 fprintf(stderr, "%s: unknown option: %s\n",
216 progname, argv[i]);
217 quit(1);
218 break;
219 }
220 else
221 break;
222 /* get lamp data (if necessary) */
223 if (lamptype != NULL) {
224 if (loadlamps(lampdat) < 0)
225 quit(1);
226 if ((lampcolor = matchlamp(lamptype)) == NULL) {
227 fprintf(stderr, "%s: unknown lamp type\n", lamptype);
228 quit(1);
229 }
230 for (j = 0; j < 3; j++)
231 if (lampcolor[j] > 1e-4)
232 colval(exposure,j) /= lampcolor[j];
233 freelamps();
234 }
235 /* open input file */
236 if (i == argc) {
237 if (singlepass)
238 fin = stdin;
239 else {
240 tfname = mktemp(template);
241 if ((fin = fopen(tfname, "w+")) == NULL) {
242 fprintf(stderr, "%s: can't create ", progname);
243 fprintf(stderr, "temp file \"%s\"\n", tfname);
244 quit(1);
245 }
246 copyfile(stdin, fin);
247 if (fseek(fin, 0L, 0) == -1) {
248 fprintf(stderr, "%s: seek fail\n", progname);
249 quit(1);
250 }
251 }
252 } else if (i == argc-1) {
253 if ((fin = fopen(argv[i], "r")) == NULL) {
254 fprintf(stderr, "%s: can't open file \"%s\"\n",
255 progname, argv[i]);
256 quit(1);
257 }
258 } else {
259 fprintf(stderr, "%s: bad # file arguments\n", progname);
260 quit(1);
261 }
262 /* get header */
263 getheader(fin, headline, NULL);
264 if (wrongformat) {
265 fprintf(stderr, "%s: input must be a Radiance picture\n",
266 progname);
267 quit(1);
268 }
269 /* add new header info. */
270 printargs(i, argv, stdout);
271 /* get picture size */
272 if ((order = fgetresolu(&xres, &yres, fin)) < 0) {
273 fprintf(stderr, "%s: bad picture size\n", progname);
274 quit(1);
275 }
276 if (!(order & YMAJOR))
277 inpaspect = 1.0/inpaspect;
278 /* wrap around for cylindrical view? */
279 wrapfilt = gotview && ourview.type == VT_CYL &&
280 ourview.horiz >= 360.-FTINY && order & YMAJOR;
281 /* compute output resolution */
282 if (ncols <= 0)
283 ncols = x_c*xres + .5;
284 if (nrows <= 0)
285 nrows = y_r*yres + .5;
286 if (outaspect > .01) {
287 d = inpaspect * yres/xres / outaspect;
288 if (d * ncols > nrows)
289 ncols = nrows / d;
290 else
291 nrows = ncols * d;
292 }
293 x_c = (double)ncols/xres;
294 y_r = (double)nrows/yres;
295
296 if (singlepass) { /* skip exposure, etc. */
297 pass1default();
298 pass2(fin);
299 quit(0);
300 }
301
302 fpos = ftell(fin); /* save input file position */
303
304 pass1(fin);
305
306 if (fseek(fin, fpos, 0) == -1) {
307 fprintf(stderr, "%s: seek fail\n", progname);
308 quit(1);
309 }
310 pass2(fin);
311
312 quit(estatus);
313 }
314
315
316 double
317 rgb_bright(clr)
318 COLOR clr;
319 {
320 return(bright(clr));
321 }
322
323
324 double
325 xyz_bright(clr)
326 COLOR clr;
327 {
328 return(clr[CIEY]);
329 }
330
331
332 double (*ourbright)() = rgb_bright;
333
334
335 headline(s) /* process line from header */
336 char *s;
337 {
338 char fmt[32];
339
340 fputs(s, stdout); /* copy to output */
341 if (isaspect(s)) /* get aspect ratio */
342 inpaspect *= aspectval(s);
343 else if (isexpos(s)) /* get exposure */
344 hotlvl *= exposval(s);
345 else if (formatval(fmt, s)) { /* get format */
346 wrongformat = 0;
347 if (!strcmp(COLRFMT, fmt))
348 ourbright = rgb_bright;
349 else if (!strcmp(CIEFMT, fmt))
350 ourbright = xyz_bright;
351 else
352 wrongformat = !globmatch(PICFMT, fmt);
353 } else if (isview(s) && sscanview(&ourview, s) > 0)
354 gotview++;
355 }
356
357
358 copyfile(in, out) /* copy a file */
359 register FILE *in, *out;
360 {
361 register int c;
362
363 while ((c = getc(in)) != EOF)
364 putc(c, out);
365
366 if (ferror(out)) {
367 fprintf(stderr, "%s: write error in copyfile\n", progname);
368 quit(1);
369 }
370 }
371
372
373 pass1(in) /* first pass of picture file */
374 FILE *in;
375 {
376 int i;
377 COLOR *scan;
378
379 pass1init();
380
381 scan = (COLOR *)malloc(xres*sizeof(COLOR));
382 if (scan == NULL) {
383 fprintf(stderr, "%s: out of memory\n", progname);
384 quit(1);
385 }
386 for (i = 0; i < yres; i++) {
387 if (freadscan(scan, xres, in) < 0) {
388 nrows = (long)nrows * i / yres; /* adjust frame */
389 if (nrows <= 0) {
390 fprintf(stderr, "%s: empty frame\n", progname);
391 quit(1);
392 }
393 fprintf(stderr, "%s: warning - partial frame (%d%%)\n",
394 progname, (int)(100L*i/yres));
395 yres = i;
396 y_r = (double)nrows/yres;
397 estatus++;
398 break;
399 }
400 pass1scan(scan, i);
401 }
402 free((char *)scan);
403 }
404
405
406 pass2(in) /* last pass on file, write to stdout */
407 FILE *in;
408 {
409 int yread;
410 int ycent, xcent;
411 int r, c;
412
413 pass2init();
414 scan2init();
415 yread = 0;
416 for (r = 0; r < nrows; r++) {
417 ycent = (r+.5)*yres/nrows;
418 while (yread <= ycent+yrad) {
419 if (yread < yres) {
420 if (freadscan(scanin[yread%barsize],
421 xres, in) < 0) {
422 fprintf(stderr,
423 "%s: truncated input (y=%d)\n",
424 progname, yres-1-yread);
425 quit(1);
426 }
427 pass2scan(scanin[yread%barsize], yread);
428 }
429 yread++;
430 }
431 if (obarsize > 0)
432 scan2sync(r);
433 for (c = 0; c < ncols; c++) {
434 xcent = (c+.5)*xres/ncols;
435 if (thresh > FTINY)
436 dothresh(xcent, ycent, c, r);
437 else if (rad > FTINY)
438 dogauss(scanout[c], xcent, ycent, c, r);
439 else
440 dobox(scanout[c], xcent, ycent, c, r);
441 }
442 if (scanout != NULL && fwritescan(scanout, ncols, stdout) < 0) {
443 fprintf(stderr, "%s: write error in pass2\n", progname);
444 quit(1);
445 }
446 }
447 /* skip leftover input */
448 while (yread < yres) {
449 if (freadscan(scanin[0], xres, in) < 0)
450 break;
451 yread++;
452 }
453 scan2flush(); /* flush output */
454 }
455
456
457 scan2init() /* prepare scanline arrays */
458 {
459 COLOR ctmp;
460 double d;
461 register int i;
462
463 xbrad = xres/ncols/2 + 1;
464 ybrad = yres/nrows/2 + 1;
465 if (rad > FTINY) {
466 if (nrows >= yres && ncols >= xres)
467 rad *= (y_r + x_c)/2.0;
468
469 if (thresh > FTINY) {
470 orad = CHECKRAD*THRESHRAD*rad + 1;
471 xrad = orad/x_c + xbrad;
472 yrad = orad/y_r + ybrad;
473 obarsize = 2*orad + 1;
474 } else {
475 xrad = CHECKRAD*rad/x_c + 1;
476 yrad = CHECKRAD*rad/y_r + 1;
477 }
478 initmask(); /* initialize filter table */
479 } else {
480 xrad = xbrad;
481 yrad = ybrad;
482 }
483 barsize = 2*yrad + 1;
484 scanin = (COLOR **)malloc(barsize*sizeof(COLOR *));
485 if (scanin == NULL)
486 goto memerr;
487 for (i = 0; i < barsize; i++) {
488 scanin[i] = (COLOR *)malloc(xres*sizeof(COLOR));
489 if (scanin[i] == NULL)
490 goto memerr;
491 }
492 if (obarsize > 0) {
493 scoutbar = (COLOR **)malloc(obarsize*sizeof(COLOR *));
494 greybar = (float **)malloc(obarsize*sizeof(float *));
495 if (scoutbar == NULL | greybar == NULL)
496 goto memerr;
497 for (i = 0; i < obarsize; i++) {
498 scoutbar[i] = (COLOR *)malloc(ncols*sizeof(COLOR));
499 greybar[i] = (float *)malloc(ncols*sizeof(float));
500 if (scoutbar[i] == NULL | greybar[i] == NULL)
501 goto memerr;
502 }
503 } else {
504 scanout = (COLOR *)malloc(ncols*sizeof(COLOR));
505 if (scanout == NULL)
506 goto memerr;
507 }
508 /* record pixel aspect ratio */
509 if (!correctaspect) {
510 d = order & YMAJOR ? x_c/y_r : y_r/x_c ;
511 if (!FEQ(d,1.0))
512 fputaspect(d, stdout);
513 }
514 /* record exposure */
515 d = (*ourbright)(exposure);
516 if (!FEQ(d,1.0))
517 fputexpos(d, stdout);
518 /* record color correction */
519 copycolor(ctmp, exposure);
520 scalecolor(ctmp, 1.0/d);
521 if (!FEQ(colval(ctmp,RED),colval(ctmp,GRN)) ||
522 !FEQ(colval(ctmp,GRN),colval(ctmp,BLU)))
523 fputcolcor(ctmp, stdout);
524 printf("\n");
525 /* write out resolution */
526 fputresolu(order, ncols, nrows, stdout);
527 return;
528 memerr:
529 fprintf(stderr, "%s: out of memory\n", progname);
530 quit(1);
531 }
532
533
534 scan2sync(r) /* synchronize grey averages and output scan */
535 int r;
536 {
537 static int nextrow = 0;
538 COLOR ctmp;
539 int ybot;
540 register int c;
541 /* average input scanlines */
542 while (nextrow <= r+orad && nextrow < nrows) {
543 ybot = (nextrow+.5)*yres/nrows;
544 for (c = 0; c < ncols; c++) {
545 dobox(ctmp, (int)((c+.5)*xres/ncols),ybot, c,nextrow);
546 greybar[nextrow%obarsize][c] = (*ourbright)(ctmp);
547 }
548 /* and zero output scanline */
549 bzero((char *)scoutbar[nextrow%obarsize], ncols*sizeof(COLOR));
550 nextrow++;
551 }
552 /* point to top scanline for output */
553 if (r-orad >= 0)
554 scanout = scoutbar[(r-orad)%obarsize];
555 else
556 scanout = NULL;
557 }
558
559
560 scan2flush() /* flush output buffer */
561 {
562 register int r;
563
564 for (r = nrows-orad; r < nrows; r++)
565 if (fwritescan(scoutbar[r%obarsize], ncols, stdout) < 0)
566 break;
567 if (fflush(stdout) < 0) {
568 fprintf(stderr, "%s: write error at end of pass2\n", progname);
569 quit(1);
570 }
571 }
572
573
574 quit(code) /* remove temporary file and exit */
575 int code;
576 {
577 if (tfname != NULL)
578 unlink(tfname);
579 exit(code);
580 }