39 |
|
static long ncall = 0L; /* number of calls to getpictscan */ |
40 |
|
static long nread = 0L; /* number of scanlines read */ |
41 |
|
|
42 |
+ |
extern long ftell(); |
43 |
|
|
44 |
+ |
|
45 |
|
COLR * |
46 |
|
getpictscan(y) /* get picture scanline */ |
47 |
|
int y; |
48 |
|
{ |
47 |
– |
extern long ftell(); |
49 |
|
int minused; |
50 |
|
register int i; |
51 |
|
/* first check our buffers */ |
60 |
|
minused = i; |
61 |
|
} |
62 |
|
/* not there, read it in */ |
63 |
< |
if (scanpos[y] == -1) { /* need to search */ |
64 |
< |
while (curpos > y) { |
63 |
> |
if (scanpos[y] < 0) { /* need to search */ |
64 |
> |
for (i = y+1; i < curpos; i++) |
65 |
> |
if (scanpos[i] >= 0) { |
66 |
> |
if (fseek(pictfp, scanpos[i], 0) < 0) |
67 |
> |
goto seekerr; |
68 |
> |
curpos = i; |
69 |
> |
break; |
70 |
> |
} |
71 |
> |
while (curpos >= y) { |
72 |
|
scanpos[curpos] = ftell(pictfp); |
73 |
|
if (freadcolrs(scan[minused].sl, pxsiz, pictfp) < 0) |
74 |
|
goto readerr; |
75 |
+ |
nread++; |
76 |
|
curpos--; |
77 |
|
} |
78 |
< |
} else if (fseek(pictfp, scanpos[y], 0) < 0) { |
79 |
< |
fprintf(stderr, "%s: picture seek error\n", progname); |
80 |
< |
exit(1); |
78 |
> |
} else { |
79 |
> |
if (curpos != y && fseek(pictfp, scanpos[y], 0) < 0) |
80 |
> |
goto seekerr; |
81 |
> |
if (freadcolrs(scan[minused].sl, pxsiz, pictfp) < 0) |
82 |
> |
goto readerr; |
83 |
> |
nread++; |
84 |
> |
curpos = y-1; |
85 |
|
} |
73 |
– |
if (freadcolrs(scan[minused].sl, pxsiz, pictfp) < 0) |
74 |
– |
goto readerr; |
75 |
– |
nread++; |
76 |
– |
curpos = y-1; |
86 |
|
scan[minused].lused = ncall; |
87 |
|
scan[minused].y = y; |
88 |
|
return(scan[minused].sl); |
89 |
|
readerr: |
90 |
|
fprintf(stderr, "%s: picture read error\n", progname); |
91 |
|
exit(1); |
92 |
+ |
seekerr: |
93 |
+ |
fprintf(stderr, "%s: picture seek error\n", progname); |
94 |
+ |
exit(1); |
95 |
|
} |
96 |
|
|
97 |
|
|
98 |
+ |
#ifdef DEBUG |
99 |
|
pict_stats() /* print out picture read statistics */ |
100 |
|
{ |
101 |
|
static long lastcall = 0L; /* ncall at last report */ |
103 |
|
|
104 |
|
if (ncall == lastcall) |
105 |
|
return; |
106 |
< |
fprintf(stderr, "%s: %ld scanlines read, %ld reused\n", |
107 |
< |
progname, nread-lastread, |
95 |
< |
(ncall-lastcall)-(nread-lastread)); |
106 |
> |
fprintf(stderr, "%s: %ld scanlines read in %ld calls\n", |
107 |
> |
progname, nread-lastread, ncall-lastcall); |
108 |
|
lastcall = ncall; |
109 |
|
lastread = nread; |
110 |
|
} |
111 |
+ |
#endif |
112 |
|
|
113 |
|
|
114 |
|
double |
167 |
|
FVECT dir; |
168 |
|
register int vh; |
169 |
|
|
170 |
+ |
#ifdef DEBUG |
171 |
|
if (verbose) |
172 |
|
fprintf(stderr, "%s: computing view span at %d...\n", |
173 |
|
progname, vv); |
174 |
+ |
#endif |
175 |
|
n = 0; |
176 |
|
for (vh = -hsize; vh <= hsize; vh++) { |
177 |
|
if (compdir(dir, vh, vv) < 0) { /* off viewable region */ |
196 |
|
rt_buf[6*n+5] = dir[2]; |
197 |
|
buf_vh[n++] = vh; |
198 |
|
} |
199 |
+ |
#ifdef DEBUG |
200 |
|
if (verbose) |
201 |
|
pict_stats(); |
202 |
+ |
#endif |
203 |
|
if (n > 0) { /* process pending buffer */ |
204 |
|
rt_compute(rt_buf, n); |
205 |
|
while (n-- > 0) |
214 |
|
{ |
215 |
|
static float nbuf[6] = {0.,0.,0.,0.,0.,0.}; |
216 |
|
|
217 |
+ |
#ifdef DEBUG |
218 |
|
if (verbose && np > 1) |
219 |
|
fprintf(stderr, "%s: sending %d samples to rtrace...\n", |
220 |
|
progname, np); |
221 |
+ |
#endif |
222 |
|
if (writebuf(fd_tort,(char *)pb,6*sizeof(float)*np) < 6*sizeof(float)*np |
223 |
|
|| writebuf(fd_tort,(char *)nbuf,sizeof(nbuf)) < sizeof(nbuf)) { |
224 |
|
fprintf(stderr, "%s: error writing to rtrace process\n", |
260 |
|
scanpos = (long *)malloc(pysiz*sizeof(long)); |
261 |
|
if (scanpos == NULL) |
262 |
|
memerr("scanline positions"); |
263 |
< |
for (i = 0; i < pysiz; i++) |
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; |
270 |
|
if (scan[i].sl == NULL) |
271 |
|
memerr("scanline buffers"); |
272 |
|
} |
253 |
– |
curpos = pysiz-1; |
273 |
|
} |
274 |
|
|
275 |
|
|