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 |
142 |
|
|
143 |
|
if (compdir(dir, vh, vv) < 0) |
144 |
|
return(-1.0); |
145 |
+ |
npixinvw++; |
146 |
|
if ((res = pict_val(dir)) >= 0.0) |
147 |
|
return(res); |
148 |
< |
if (rt_pid == -1) |
148 |
> |
if (rt_pid == -1) { |
149 |
> |
npixmiss++; |
150 |
|
return(-1.0); |
151 |
+ |
} |
152 |
|
rt_buf[0] = ourview.vp[0]; |
153 |
|
rt_buf[1] = ourview.vp[1]; |
154 |
|
rt_buf[2] = ourview.vp[2]; |
170 |
|
FVECT dir; |
171 |
|
register int vh; |
172 |
|
|
173 |
+ |
#ifdef DEBUG |
174 |
|
if (verbose) |
175 |
|
fprintf(stderr, "%s: computing view span at %d...\n", |
176 |
|
progname, vv); |
177 |
+ |
#endif |
178 |
|
n = 0; |
179 |
|
for (vh = -hsize; vh <= hsize; vh++) { |
180 |
|
if (compdir(dir, vh, vv) < 0) { /* off viewable region */ |
181 |
|
vb[vh+hsize] = -1.0; |
182 |
|
continue; |
183 |
|
} |
184 |
+ |
npixinvw++; |
185 |
|
if ((vb[vh+hsize] = pict_val(dir)) >= 0.0) |
186 |
|
continue; |
187 |
< |
if (rt_pid == -1) /* missing information */ |
187 |
> |
if (rt_pid == -1) { /* missing information */ |
188 |
> |
npixmiss++; |
189 |
|
continue; |
190 |
+ |
} |
191 |
|
/* send to rtrace */ |
192 |
|
if (n >= MAXPIX) { /* flush */ |
193 |
|
rt_compute(rt_buf, n); |
202 |
|
rt_buf[6*n+5] = dir[2]; |
203 |
|
buf_vh[n++] = vh; |
204 |
|
} |
205 |
+ |
#ifdef DEBUG |
206 |
|
if (verbose) |
207 |
|
pict_stats(); |
208 |
+ |
#endif |
209 |
|
if (n > 0) { /* process pending buffer */ |
210 |
|
rt_compute(rt_buf, n); |
211 |
|
while (n-- > 0) |
220 |
|
{ |
221 |
|
static float nbuf[6] = {0.,0.,0.,0.,0.,0.}; |
222 |
|
|
223 |
+ |
#ifdef DEBUG |
224 |
|
if (verbose && np > 1) |
225 |
|
fprintf(stderr, "%s: sending %d samples to rtrace...\n", |
226 |
|
progname, np); |
227 |
+ |
#endif |
228 |
|
if (writebuf(fd_tort,(char *)pb,6*sizeof(float)*np) < 6*sizeof(float)*np |
229 |
|
|| writebuf(fd_tort,(char *)nbuf,sizeof(nbuf)) < sizeof(nbuf)) { |
230 |
|
fprintf(stderr, "%s: error writing to rtrace process\n", |
266 |
|
scanpos = (long *)malloc(pysiz*sizeof(long)); |
267 |
|
if (scanpos == NULL) |
268 |
|
memerr("scanline positions"); |
269 |
< |
for (i = 0; i < pysiz; i++) |
269 |
> |
for (i = pysiz-1; i >= 0; i--) |
270 |
|
scanpos[i] = -1L; |
271 |
+ |
curpos = pysiz-1; |
272 |
|
for (i = 0; i < NSCANS; i++) { |
273 |
|
scan[i].lused = -1; |
274 |
|
scan[i].y = -1; |
276 |
|
if (scan[i].sl == NULL) |
277 |
|
memerr("scanline buffers"); |
278 |
|
} |
253 |
– |
curpos = pysiz-1; |
279 |
|
} |
280 |
|
|
281 |
|
|