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root/radiance/ray/src/hd/rhcopy.c
Revision: 3.18
Committed: Mon Jul 21 22:30:18 2003 UTC (20 years, 8 months ago) by schorsch
Content type: text/plain
Branch: MAIN
Changes since 3.17: +2 -2 lines
Log Message:
Eliminated copystruct() macro, which is unnecessary in ANSI.
Reduced ambiguity warnings for nested if/if/else clauses.

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: rhcopy.c,v 3.17 2003/06/26 00:58:10 schorsch Exp $";
3 #endif
4 /*
5 * Copy data into a holodeck file
6 */
7
8 #include "holo.h"
9 #include "view.h"
10
11 #ifndef BKBSIZE
12 #define BKBSIZE 256 /* beam clump size (kilobytes) */
13 #endif
14
15 int checkdepth = 1; /* check depth (!-d option)? */
16 int checkrepeats = 0; /* check for repeats (-u option)? */
17 int frompicz; /* input from pictures & depth-buffers? */
18 int noutsects; /* number of output sections */
19 char obstr, unobstr; /* flag pointer values */
20
21 char *progname; /* global argv[0] */
22
23
24 main(argc, argv)
25 int argc;
26 char *argv[];
27 {
28 int i;
29
30 progname = argv[0];
31 frompicz = -1;
32 for (i = 2; i < argc && argv[i][0] == '-'; i++)
33 switch (argv[i][1]) {
34 case 'u':
35 checkrepeats = 1;
36 break;
37 case 'd':
38 checkdepth = 0;
39 break;
40 case 'h':
41 frompicz = 0;
42 break;
43 case 'p':
44 frompicz = 1;
45 break;
46 default:
47 goto userr;
48 }
49 if (i >= argc || frompicz < 0)
50 goto userr;
51 if (frompicz && (argc-i)%2)
52 goto userr;
53 noutsects = openholo(argv[1], 1);
54 if (frompicz) {
55 for ( ; i < argc; i += 2)
56 addpicz(argv[i], argv[i+1]);
57 } else {
58 if (BKBSIZE*1024*1.5 > hdcachesize)
59 hdcachesize = BKBSIZE*1024*1.5;
60 for ( ; i < argc; i++)
61 addholo(argv[i]);
62 }
63 quit(0);
64 userr:
65 fprintf(stderr, "Usage: %s output.hdk [-u][-d] -h inp1.hdk ..\n",
66 progname);
67 fprintf(stderr, " Or: %s output.hdk [-u][-d] -p inp1.pic inp1.zbf ..\n",
68 progname);
69 exit(1);
70 }
71
72
73 #define H_BADF 01
74 #define H_OBST 02
75 #define H_OBSF 04
76
77 int
78 holheadline(s, hf) /* check holodeck header line */
79 register char *s;
80 int *hf;
81 {
82 char fmt[32];
83
84 if (formatval(fmt, s)) {
85 if (strcmp(fmt, HOLOFMT))
86 *hf |= H_BADF;
87 else
88 *hf &= ~H_BADF;
89 return(0);
90 }
91 if (!strncmp(s, "OBSTRUCTIONS=", 13)) {
92 s += 13;
93 while (*s == ' ') s++;
94 if (*s == 't' | *s == 'T')
95 *hf |= H_OBST;
96 else if (*s == 'f' | *s == 'F')
97 *hf |= H_OBSF;
98 else
99 error(WARNING, "bad OBSTRUCTIONS value in holodeck");
100 return(0);
101 }
102 return(0);
103 }
104
105 int
106 openholo(fname, append) /* open existing holodeck file for i/o */
107 char *fname;
108 int append;
109 {
110 FILE *fp;
111 int fd;
112 int hflags = 0;
113 long nextloc;
114 int n;
115 /* open holodeck file */
116 if ((fp = fopen(fname, append ? "r+" : "r")) == NULL) {
117 sprintf(errmsg, "cannot open \"%s\" for %s", fname,
118 append ? "appending" : "reading");
119 error(SYSTEM, errmsg);
120 }
121 /* check header and magic number */
122 if (getheader(fp, holheadline, (char *)&hflags) < 0 ||
123 hflags&H_BADF || getw(fp) != HOLOMAGIC) {
124 sprintf(errmsg, "file \"%s\" not in holodeck format", fname);
125 error(USER, errmsg);
126 }
127 fd = dup(fileno(fp)); /* dup file handle */
128 nextloc = ftell(fp); /* get stdio position */
129 fclose(fp); /* done with stdio */
130 for (n = 0; nextloc > 0L; n++) { /* initialize each section */
131 lseek(fd, (off_t)nextloc, 0);
132 read(fd, (char *)&nextloc, sizeof(nextloc));
133 hdinit(fd, NULL)->priv = hflags&H_OBST ? &obstr :
134 hflags&H_OBSF ? &unobstr : (char *)NULL;
135 }
136 return(n);
137 }
138
139 #undef H_BADF
140 #undef H_OBST
141 #undef H_OBSF
142
143
144 addray(ro, rd, d, cv) /* add a ray to our output holodeck */
145 FVECT ro, rd;
146 double d;
147 COLR cv;
148 {
149 int sn, bi, n;
150 register HOLO *hp;
151 GCOORD gc[2];
152 BYTE rr[2][2];
153 BEAM *bp;
154 double d0, d1;
155 unsigned dc;
156 register RAYVAL *rv;
157 /* check each output section */
158 for (sn = noutsects; sn--; ) {
159 hp = hdlist[sn];
160 d0 = hdinter(gc, rr, &d1, hp, ro, rd);
161 if (d <= d0 || d1 < -0.001)
162 continue; /* missed section */
163 if (checkdepth) { /* check depth */
164 if (hp->priv == &obstr && d0 < -0.001)
165 continue; /* ray starts too late */
166 if (hp->priv == &unobstr && d < 0.999*d1)
167 continue; /* ray ends too soon */
168 }
169 dc = hdcode(hp, d-d0);
170 bi = hdbindex(hp, gc); /* check for duplicates */
171 if (checkrepeats && (bp = hdgetbeam(hp, bi)) != NULL) {
172 for (n = bp->nrm, rv = hdbray(bp); n--; rv++)
173 if ((hp->priv != NULL || rv->d == dc) &&
174 rv->r[0][0] == rr[0][0] &&
175 rv->r[0][1] == rr[0][1] &&
176 rv->r[1][0] == rr[1][0] &&
177 rv->r[1][1] == rr[1][1])
178 break;
179 if (n >= 0)
180 continue; /* found a matching ray */
181 }
182 rv = hdnewrays(hp, bi, 1);
183 rv->d = dc;
184 rv->r[0][0] = rr[0][0]; rv->r[0][1] = rr[0][1];
185 rv->r[1][0] = rr[1][0]; rv->r[1][1] = rr[1][1];
186 copycolr(rv->v, cv);
187 }
188 }
189
190
191 static BEAMI *beamdir;
192
193 static int
194 bpcmp(b1p, b2p) /* compare beam positions on disk */
195 int *b1p, *b2p;
196 {
197 register off_t pdif = beamdir[*b1p].fo - beamdir[*b2p].fo;
198
199 if (pdif > 0L) return(1);
200 if (pdif < 0L) return(-1);
201 return(0);
202 }
203
204 static int
205 addclump(hp, bq, nb) /* transfer the given clump and free */
206 HOLO *hp;
207 int *bq, nb;
208 {
209 GCOORD gc[2];
210 FVECT ro, rd;
211 double d;
212 int i;
213 register int k;
214 register BEAM *bp;
215 /* sort based on file position */
216 beamdir = hp->bi;
217 qsort((char *)bq, nb, sizeof(*bq), bpcmp);
218 /* transfer each beam */
219 for (i = 0; i < nb; i++) {
220 bp = hdgetbeam(hp, bq[i]);
221 hdbcoord(gc, hp, bq[i]);
222 /* add each ray to output */
223 for (k = bp->nrm; k--; ) {
224 d = hdray(ro, rd, hp, gc, hdbray(bp)[k].r);
225 if (hp->priv == &unobstr)
226 VSUM(ro, ro, rd, d);
227 else
228 d = 0.;
229 d = hddepth(hp, hdbray(bp)[k].d) - d;
230 addray(ro, rd, d, hdbray(bp)[k].v);
231 }
232 hdfreebeam(hp, bq[i]); /* free the beam */
233 }
234 return(0);
235 }
236
237 addholo(hdf) /* add a holodeck file */
238 char *hdf;
239 {
240 int fd;
241 /* open the holodeck for reading */
242 openholo(hdf, 0);
243 fd = hdlist[noutsects]->fd; /* remember the file handle */
244 while (hdlist[noutsects] != NULL) { /* load each section */
245 /* clump the beams */
246 clumpbeams(hdlist[noutsects], 0, BKBSIZE*1024, addclump);
247 hddone(hdlist[noutsects]); /* free the section */
248 }
249 close(fd); /* close input file */
250 hdflush(NULL); /* flush output */
251 }
252
253
254 struct phead {
255 VIEW vw;
256 double expos;
257 short gotview;
258 short badfmt;
259 short altprims;
260 };
261
262
263 int
264 picheadline(s, ph) /* process picture header line */
265 char *s;
266 struct phead *ph;
267 {
268 char fmt[32];
269
270 if (formatval(fmt, s)) {
271 ph->badfmt = strcmp(fmt, COLRFMT);
272 return(0);
273 }
274 if (isprims(s)) {
275 ph->altprims++; /* don't want to deal with this */
276 return(0);
277 }
278 if (isexpos(s)) {
279 ph->expos *= exposval(s);
280 return(0);
281 }
282 if (isview(s)) {
283 ph->gotview += sscanview(&ph->vw, s);
284 return(0);
285 }
286 return(0);
287 }
288
289
290 addpicz(pcf, zbf) /* add a picture + depth-buffer */
291 char *pcf, *zbf;
292 {
293 FILE *pfp;
294 int zfd;
295 COLR *cscn;
296 float *zscn;
297 struct phead phd;
298 int eshft;
299 double emult;
300 RESOLU prs;
301 RREAL vl[2];
302 FVECT ro, rd;
303 double aftd;
304 COLOR ctmp;
305 int j;
306 register int i;
307 /* open files */
308 if ((pfp = fopen(pcf, "r")) == NULL) {
309 sprintf(errmsg, "cannot open picture file \"%s\"", pcf);
310 error(SYSTEM, pcf);
311 }
312 if ((zfd = open(zbf, O_RDONLY)) < 0) {
313 sprintf(errmsg, "cannot open depth file \"%s\"", zbf);
314 error(SYSTEM, pcf);
315 }
316 /* load picture header */
317 phd.vw = stdview;
318 phd.expos = 1.0;
319 phd.badfmt = phd.gotview = phd.altprims = 0;
320 if (getheader(pfp, picheadline, (char *)&phd) < 0 ||
321 phd.badfmt || !fgetsresolu(&prs, pfp)) {
322 sprintf(errmsg, "bad format for picture file \"%s\"", pcf);
323 error(USER, errmsg);
324 }
325 if (!phd.gotview || setview(&phd.vw) != NULL) {
326 sprintf(errmsg, "missing/illegal view in picture \"%s\"",
327 pcf);
328 error(USER, errmsg);
329 }
330 if (phd.altprims) {
331 sprintf(errmsg, "ignoring primary values in picture \"%s\"",
332 pcf);
333 error(WARNING, errmsg);
334 }
335 /* figure out what to do about exposure */
336 if (phd.expos < 0.99 | phd.expos > 1.01) {
337 emult = -log(phd.expos)/log(2.);
338 eshft = emult >= 0. ? emult+.5 : emult-.5;
339 emult -= (double)eshft;
340 if (emult <= 0.01 & emult >= -0.01)
341 emult = -1.;
342 else {
343 emult = 1./phd.expos;
344 eshft = 0;
345 }
346 } else {
347 emult = -1.;
348 eshft = 0;
349 }
350 /* allocate buffers */
351 cscn = (COLR *)malloc(scanlen(&prs)*sizeof(COLR));
352 zscn = (float *)malloc(scanlen(&prs)*sizeof(float));
353 if (cscn == NULL | zscn == NULL)
354 error(SYSTEM, "out of memory in addpicz");
355 /* read and process each scanline */
356 for (j = 0; j < numscans(&prs); j++) {
357 i = scanlen(&prs); /* read colrs */
358 if (freadcolrs(cscn, i, pfp) < 0) {
359 sprintf(errmsg, "error reading picture \"%s\"", pcf);
360 error(USER, errmsg);
361 }
362 if (eshft) /* shift exposure */
363 shiftcolrs(cscn, i, eshft);
364 i *= sizeof(float); /* read depth */
365 if (read(zfd, (char *)zscn, i) != i) {
366 sprintf(errmsg, "error reading depth file \"%s\"", zbf);
367 error(USER, errmsg);
368 }
369 for (i = scanlen(&prs); i--; ) { /* do each pixel */
370 pix2loc(vl, &prs, i, j);
371 aftd = viewray(ro, rd, &phd.vw, vl[0], vl[1]);
372 if (aftd < -FTINY)
373 continue; /* off view */
374 if (aftd > FTINY && zscn[i] > aftd)
375 continue; /* aft clipped */
376 if (emult > 0.) { /* whatta pain */
377 colr_color(ctmp, cscn[i]);
378 scalecolor(ctmp, emult);
379 setcolr(cscn[i], colval(ctmp,RED),
380 colval(ctmp,GRN), colval(ctmp,BLU));
381 }
382 addray(ro, rd, (double)zscn[i], cscn[i]);
383 }
384 }
385 /* write output and free beams */
386 hdflush(NULL);
387 /* clean up */
388 free((void *)cscn);
389 free((void *)zscn);
390 fclose(pfp);
391 close(zfd);
392 }
393
394
395 void
396 eputs(s) /* put error message to stderr */
397 register char *s;
398 {
399 static int midline = 0;
400
401 if (!*s)
402 return;
403 if (!midline++) { /* prepend line with program name */
404 fputs(progname, stderr);
405 fputs(": ", stderr);
406 }
407 fputs(s, stderr);
408 if (s[strlen(s)-1] == '\n') {
409 fflush(stderr);
410 midline = 0;
411 }
412 }
413
414
415 void
416 quit(code) /* exit the program gracefully */
417 int code;
418 {
419 hdsync(NULL, 1); /* write out any buffered data */
420 exit(code);
421 }