20 |
|
#define vfork fork |
21 |
|
#endif |
22 |
|
|
23 |
< |
#define NSCANS 64 /* number of scanlines to buffer */ |
23 |
> |
#define MAXSBUF 524268 /* maximum total size of scanline buffer */ |
24 |
> |
#define HSIZE 317 /* size of scanline hash table */ |
25 |
> |
#define NRETIRE 16 /* number of scanlines to retire at once */ |
26 |
|
|
27 |
|
int rt_pid = -1; /* process id for rtrace */ |
28 |
|
int fd_tort, fd_fromrt; /* pipe descriptors */ |
30 |
|
FILE *pictfp = NULL; /* picture file pointer */ |
31 |
|
double exposure; /* picture exposure */ |
32 |
|
int pxsiz, pysiz; /* picture dimensions */ |
33 |
< |
int curpos; /* current scanline */ |
34 |
< |
long *scanpos; /* scanline positions */ |
35 |
< |
struct { |
36 |
< |
long lused; /* for LRU replacement */ |
33 |
> |
|
34 |
> |
static int curpos; /* current scanline */ |
35 |
> |
static long *scanpos; /* scanline positions */ |
36 |
> |
|
37 |
> |
typedef struct scan { |
38 |
|
int y; /* scanline position */ |
39 |
< |
COLR *sl; /* scanline contents */ |
40 |
< |
} scan[NSCANS]; /* buffered scanlines */ |
39 |
> |
long lused; /* for LRU replacement */ |
40 |
> |
struct scan *next; /* next in this hash or free list */ |
41 |
> |
/* followed by the scanline data */ |
42 |
> |
} SCAN; /* buffered scanline */ |
43 |
|
|
44 |
+ |
#define scandata(sl) ((COLR *)((sl)+1)) |
45 |
+ |
#define shash(y) ((y)%HSIZE) |
46 |
+ |
|
47 |
+ |
static SCAN *freelist; /* scanline free list */ |
48 |
+ |
static SCAN *hashtab[HSIZE]; /* scanline hash table */ |
49 |
+ |
|
50 |
|
static long ncall = 0L; /* number of calls to getpictscan */ |
51 |
|
static long nread = 0L; /* number of scanlines read */ |
52 |
|
|
53 |
+ |
static int wrongformat = 0; |
54 |
+ |
|
55 |
+ |
SCAN *scanretire(); |
56 |
+ |
|
57 |
|
extern long ftell(); |
58 |
|
|
59 |
|
|
60 |
+ |
SCAN * |
61 |
+ |
claimscan(y) /* claim scanline from buffers */ |
62 |
+ |
int y; |
63 |
+ |
{ |
64 |
+ |
int hi = shash(y); |
65 |
+ |
SCAN *slast; |
66 |
+ |
register SCAN *sl; |
67 |
+ |
|
68 |
+ |
for (sl = hashtab[hi]; sl != NULL; sl = sl->next) |
69 |
+ |
if (sl->y == y) /* active scanline */ |
70 |
+ |
return(sl); |
71 |
+ |
for (slast = NULL, sl = freelist; sl != NULL; slast = sl, sl = sl->next) |
72 |
+ |
if (sl->y == -1 || sl->y == y || sl->next == NULL) { |
73 |
+ |
if (slast == NULL) /* remove from free */ |
74 |
+ |
freelist = sl->next; |
75 |
+ |
else |
76 |
+ |
slast->next = sl->next; |
77 |
+ |
if (sl->y == y) { /* reclaim */ |
78 |
+ |
sl->next = hashtab[hi]; |
79 |
+ |
hashtab[hi] = sl; |
80 |
+ |
#ifdef DEBUG |
81 |
+ |
if (verbose) |
82 |
+ |
fprintf(stderr, |
83 |
+ |
"%s: scanline %d reclaimed\n", |
84 |
+ |
progname, y); |
85 |
+ |
#endif |
86 |
+ |
} |
87 |
+ |
return(sl); |
88 |
+ |
} |
89 |
+ |
return(scanretire()); /* need more free scanlines */ |
90 |
+ |
} |
91 |
+ |
|
92 |
+ |
|
93 |
|
COLR * |
94 |
|
getpictscan(y) /* get picture scanline */ |
95 |
|
int y; |
96 |
|
{ |
97 |
< |
int minused; |
97 |
> |
register SCAN *sl; |
98 |
|
register int i; |
99 |
|
/* first check our buffers */ |
100 |
< |
ncall++; |
101 |
< |
minused = 0; |
102 |
< |
for (i = 0; i < NSCANS; i++) { |
103 |
< |
if (scan[i].y == y) { |
104 |
< |
scan[i].lused = ncall; |
105 |
< |
return(scan[i].sl); |
106 |
< |
} |
59 |
< |
if (scan[i].lused < scan[minused].lused) |
60 |
< |
minused = i; |
61 |
< |
} |
62 |
< |
/* not there, read it in */ |
100 |
> |
sl = claimscan(y); |
101 |
> |
if (sl == NULL) |
102 |
> |
memerr("claimscan()"); |
103 |
> |
sl->lused = ncall++; |
104 |
> |
if (sl->y == y) /* scan hit */ |
105 |
> |
return(scandata(sl)); |
106 |
> |
/* else read in replacement */ |
107 |
|
if (scanpos[y] < 0) { /* need to search */ |
108 |
|
for (i = y+1; i < curpos; i++) |
109 |
|
if (scanpos[i] >= 0) { |
114 |
|
} |
115 |
|
while (curpos >= y) { |
116 |
|
scanpos[curpos] = ftell(pictfp); |
117 |
< |
if (freadcolrs(scan[minused].sl, pxsiz, pictfp) < 0) |
117 |
> |
if (freadcolrs(scandata(sl), pxsiz, pictfp) < 0) |
118 |
|
goto readerr; |
119 |
|
nread++; |
120 |
|
curpos--; |
122 |
|
} else { |
123 |
|
if (curpos != y && fseek(pictfp, scanpos[y], 0) < 0) |
124 |
|
goto seekerr; |
125 |
< |
if (freadcolrs(scan[minused].sl, pxsiz, pictfp) < 0) |
125 |
> |
if (freadcolrs(scandata(sl), pxsiz, pictfp) < 0) |
126 |
|
goto readerr; |
127 |
|
nread++; |
128 |
|
curpos = y-1; |
129 |
|
} |
130 |
< |
scan[minused].lused = ncall; |
131 |
< |
scan[minused].y = y; |
132 |
< |
return(scan[minused].sl); |
130 |
> |
sl->y = y; |
131 |
> |
i = shash(y); /* add to hash list */ |
132 |
> |
sl->next = hashtab[i]; |
133 |
> |
hashtab[i] = sl; |
134 |
> |
return(scandata(sl)); |
135 |
|
readerr: |
136 |
|
fprintf(stderr, "%s: picture read error\n", progname); |
137 |
|
exit(1); |
188 |
|
|
189 |
|
if (compdir(dir, vh, vv) < 0) |
190 |
|
return(-1.0); |
191 |
+ |
npixinvw++; |
192 |
|
if ((res = pict_val(dir)) >= 0.0) |
193 |
|
return(res); |
194 |
< |
if (rt_pid == -1) |
194 |
> |
if (rt_pid == -1) { |
195 |
> |
npixmiss++; |
196 |
|
return(-1.0); |
197 |
+ |
} |
198 |
|
rt_buf[0] = ourview.vp[0]; |
199 |
|
rt_buf[1] = ourview.vp[1]; |
200 |
|
rt_buf[2] = ourview.vp[2]; |
223 |
|
#endif |
224 |
|
n = 0; |
225 |
|
for (vh = -hsize; vh <= hsize; vh++) { |
226 |
< |
if (compdir(dir, vh, vv) < 0) { /* off viewable region */ |
226 |
> |
if (compdir(dir, vh, vv) < 0) { /* not in view */ |
227 |
|
vb[vh+hsize] = -1.0; |
228 |
|
continue; |
229 |
|
} |
230 |
+ |
npixinvw++; |
231 |
|
if ((vb[vh+hsize] = pict_val(dir)) >= 0.0) |
232 |
|
continue; |
233 |
< |
if (rt_pid == -1) /* missing information */ |
233 |
> |
if (rt_pid == -1) { /* missing information */ |
234 |
> |
npixmiss++; |
235 |
|
continue; |
236 |
+ |
} |
237 |
|
/* send to rtrace */ |
238 |
|
if (n >= MAXPIX) { /* flush */ |
239 |
|
rt_compute(rt_buf, n); |
289 |
|
getexpos(s) /* get exposure from header line */ |
290 |
|
char *s; |
291 |
|
{ |
292 |
+ |
char fmt[32]; |
293 |
+ |
|
294 |
|
if (isexpos(s)) |
295 |
|
exposure *= exposval(s); |
296 |
+ |
else if (isformat(s)) { |
297 |
+ |
formatval(fmt, s); |
298 |
+ |
wrongformat = strcmp(fmt, COLRFMT); |
299 |
+ |
} |
300 |
|
} |
301 |
|
|
302 |
|
|
303 |
|
open_pict(fn) /* open picture file */ |
304 |
|
char *fn; |
305 |
|
{ |
248 |
– |
register int i; |
249 |
– |
|
306 |
|
if ((pictfp = fopen(fn, "r")) == NULL) { |
307 |
|
fprintf("%s: cannot open\n", fn); |
308 |
|
exit(1); |
309 |
|
} |
310 |
|
exposure = 1.0; |
311 |
< |
getheader(pictfp, getexpos); |
312 |
< |
if (fgetresolu(&pxsiz, &pysiz, pictfp) != (YMAJOR|YDECR)) { |
313 |
< |
fprintf("%s: bad picture resolution\n", fn); |
311 |
> |
getheader(pictfp, getexpos, NULL); |
312 |
> |
if (wrongformat || |
313 |
> |
fgetresolu(&pxsiz, &pysiz, pictfp) != (YMAJOR|YDECR)) { |
314 |
> |
fprintf("%s: bad picture format\n", fn); |
315 |
|
exit(1); |
316 |
|
} |
317 |
< |
scanpos = (long *)malloc(pysiz*sizeof(long)); |
261 |
< |
if (scanpos == NULL) |
262 |
< |
memerr("scanline positions"); |
263 |
< |
for (i = pysiz-1; i >= 0; i--) |
264 |
< |
scanpos[i] = -1L; |
265 |
< |
curpos = pysiz-1; |
266 |
< |
for (i = 0; i < NSCANS; i++) { |
267 |
< |
scan[i].lused = -1; |
268 |
< |
scan[i].y = -1; |
269 |
< |
scan[i].sl = (COLR *)malloc(pxsiz*sizeof(COLR)); |
270 |
< |
if (scan[i].sl == NULL) |
271 |
< |
memerr("scanline buffers"); |
272 |
< |
} |
317 |
> |
initscans(); |
318 |
|
} |
319 |
|
|
320 |
|
|
321 |
|
close_pict() /* done with picture */ |
322 |
|
{ |
278 |
– |
register int i; |
279 |
– |
|
323 |
|
if (pictfp == NULL) |
324 |
|
return; |
325 |
|
fclose(pictfp); |
326 |
< |
free((char *)scanpos); |
284 |
< |
for (i = 0; i < NSCANS; i++) |
285 |
< |
free((char *)scan[i].sl); |
326 |
> |
donescans(); |
327 |
|
pictfp = NULL; |
328 |
|
} |
329 |
|
|
414 |
|
if (cc < 0) |
415 |
|
return(cc); |
416 |
|
return(siz-nrem); |
417 |
+ |
} |
418 |
+ |
|
419 |
+ |
|
420 |
+ |
SCAN * |
421 |
+ |
scanretire() /* retire old scanlines to free list */ |
422 |
+ |
{ |
423 |
+ |
SCAN *sold[NRETIRE]; |
424 |
+ |
int n; |
425 |
+ |
int h; |
426 |
+ |
register SCAN *sl; |
427 |
+ |
register int i; |
428 |
+ |
/* grab the NRETIRE oldest scanlines */ |
429 |
+ |
sold[n = 0] = NULL; |
430 |
+ |
for (h = 0; h < HSIZE; h++) |
431 |
+ |
for (sl = hashtab[h]; sl != NULL; sl = sl->next) { |
432 |
+ |
for (i = n; i && sold[i-1]->lused > sl->lused; i--) |
433 |
+ |
if (i < NRETIRE) |
434 |
+ |
sold[i] = sold[i-1]; |
435 |
+ |
if (i < NRETIRE) { |
436 |
+ |
sold[i] = sl; |
437 |
+ |
if (n < NRETIRE) /* grow list */ |
438 |
+ |
n++; |
439 |
+ |
} |
440 |
+ |
} |
441 |
+ |
/* put scanlines into free list */ |
442 |
+ |
for (i = 0; i < n; i++) { |
443 |
+ |
h = shash(sold[i]->y); |
444 |
+ |
sl = hashtab[h]; |
445 |
+ |
if (sl == sold[i]) |
446 |
+ |
hashtab[h] = sl->next; |
447 |
+ |
else { |
448 |
+ |
while (sl->next != sold[i]) /* IS in list */ |
449 |
+ |
sl = sl->next; |
450 |
+ |
sl->next = sold[i]->next; |
451 |
+ |
} |
452 |
+ |
if (i > 0) { /* save oldest as return value */ |
453 |
+ |
sold[i]->next = freelist; |
454 |
+ |
freelist = sold[i]; |
455 |
+ |
} |
456 |
+ |
} |
457 |
+ |
return(sold[0]); |
458 |
+ |
} |
459 |
+ |
|
460 |
+ |
|
461 |
+ |
static char *scan_buf; |
462 |
+ |
|
463 |
+ |
|
464 |
+ |
initscans() /* initialize scanline buffers */ |
465 |
+ |
{ |
466 |
+ |
int scansize; |
467 |
+ |
register SCAN *ptr; |
468 |
+ |
register int i; |
469 |
+ |
/* initialize positions */ |
470 |
+ |
scanpos = (long *)malloc(pysiz*sizeof(long)); |
471 |
+ |
if (scanpos == NULL) |
472 |
+ |
memerr("scanline positions"); |
473 |
+ |
for (i = pysiz-1; i >= 0; i--) |
474 |
+ |
scanpos[i] = -1L; |
475 |
+ |
curpos = pysiz-1; |
476 |
+ |
/* clear hash table */ |
477 |
+ |
for (i = 0; i < HSIZE; i++) |
478 |
+ |
hashtab[i] = NULL; |
479 |
+ |
/* allocate scanline buffers */ |
480 |
+ |
scansize = sizeof(SCAN) + pxsiz*sizeof(COLR); |
481 |
+ |
#ifdef ALIGN |
482 |
+ |
scansize = scansize+(sizeof(ALIGN)-1)) & ~(sizeof(ALIGN)-1); |
483 |
+ |
#endif |
484 |
+ |
i = MAXSBUF / scansize; /* compute number to allocate */ |
485 |
+ |
if (i > HSIZE) |
486 |
+ |
i = HSIZE; |
487 |
+ |
scan_buf = malloc(i*scansize); /* get in one big chunk */ |
488 |
+ |
if (scan_buf == NULL) |
489 |
+ |
memerr("scanline buffers"); |
490 |
+ |
ptr = (SCAN *)scan_buf; |
491 |
+ |
freelist = NULL; /* build our free list */ |
492 |
+ |
while (i-- > 0) { |
493 |
+ |
ptr->y = -1; |
494 |
+ |
ptr->lused = -1; |
495 |
+ |
ptr->next = freelist; |
496 |
+ |
freelist = ptr; |
497 |
+ |
ptr = (SCAN *)((char *)ptr + scansize); /* beware of C bugs */ |
498 |
+ |
} |
499 |
+ |
} |
500 |
+ |
|
501 |
+ |
|
502 |
+ |
donescans() /* free up scanlines */ |
503 |
+ |
{ |
504 |
+ |
free(scan_buf); |
505 |
+ |
free((char *)scanpos); |
506 |
|
} |