| 20 |
|
#define vfork fork |
| 21 |
|
#endif |
| 22 |
|
|
| 23 |
< |
#define NSCANS 32 /* number of scanlines to buffer */ |
| 23 |
> |
#define NSCANS 64 /* number of scanlines to buffer */ |
| 24 |
|
|
| 25 |
|
int rt_pid = -1; /* process id for rtrace */ |
| 26 |
|
int fd_tort, fd_fromrt; /* pipe descriptors */ |
| 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 |
|
|
| 161 |
|
float *vb; |
| 162 |
|
{ |
| 163 |
|
float rt_buf[6*MAXPIX]; /* rtrace send/receive buffer */ |
| 164 |
< |
int npix_tort; /* number of pixels in buffer */ |
| 164 |
> |
register int n; /* number of pixels in buffer */ |
| 165 |
|
short buf_vh[MAXPIX]; /* pixel positions */ |
| 166 |
|
FVECT dir; |
| 167 |
|
register int vh; |
| 156 |
– |
register int i; |
| 168 |
|
|
| 169 |
+ |
#ifdef DEBUG |
| 170 |
|
if (verbose) |
| 171 |
|
fprintf(stderr, "%s: computing view span at %d...\n", |
| 172 |
|
progname, vv); |
| 173 |
< |
npix_tort = 0; |
| 173 |
> |
#endif |
| 174 |
> |
n = 0; |
| 175 |
|
for (vh = -hsize; vh <= hsize; vh++) { |
| 176 |
|
if (compdir(dir, vh, vv) < 0) { /* off viewable region */ |
| 177 |
|
vb[vh+hsize] = -1.0; |
| 182 |
|
if (rt_pid == -1) /* missing information */ |
| 183 |
|
continue; |
| 184 |
|
/* send to rtrace */ |
| 185 |
< |
if (npix_tort >= MAXPIX) { /* flush */ |
| 186 |
< |
rt_compute(rt_buf, npix_tort); |
| 187 |
< |
for (i = 0; i < npix_tort; i++) |
| 188 |
< |
vb[buf_vh[i]+hsize] = luminance(rt_buf+3*i); |
| 176 |
< |
npix_tort = 0; |
| 185 |
> |
if (n >= MAXPIX) { /* flush */ |
| 186 |
> |
rt_compute(rt_buf, n); |
| 187 |
> |
while (n-- > 0) |
| 188 |
> |
vb[buf_vh[n]+hsize] = luminance(rt_buf+3*n); |
| 189 |
|
} |
| 190 |
< |
rt_buf[6*npix_tort] = ourview.vp[0]; |
| 191 |
< |
rt_buf[6*npix_tort+1] = ourview.vp[1]; |
| 192 |
< |
rt_buf[6*npix_tort+2] = ourview.vp[2]; |
| 193 |
< |
rt_buf[6*npix_tort+3] = dir[0]; |
| 194 |
< |
rt_buf[6*npix_tort+4] = dir[1]; |
| 195 |
< |
rt_buf[6*npix_tort+5] = dir[2]; |
| 196 |
< |
buf_vh[npix_tort++] = vh; |
| 190 |
> |
rt_buf[6*n] = ourview.vp[0]; |
| 191 |
> |
rt_buf[6*n+1] = ourview.vp[1]; |
| 192 |
> |
rt_buf[6*n+2] = ourview.vp[2]; |
| 193 |
> |
rt_buf[6*n+3] = dir[0]; |
| 194 |
> |
rt_buf[6*n+4] = dir[1]; |
| 195 |
> |
rt_buf[6*n+5] = dir[2]; |
| 196 |
> |
buf_vh[n++] = vh; |
| 197 |
|
} |
| 198 |
< |
if (npix_tort > 0) { /* process pending buffer */ |
| 187 |
< |
rt_compute(rt_buf, npix_tort); |
| 188 |
< |
for (i = 0; i < npix_tort; i++) |
| 189 |
< |
vb[buf_vh[i]+hsize] = luminance(rt_buf+3*i); |
| 190 |
< |
} |
| 198 |
> |
#ifdef DEBUG |
| 199 |
|
if (verbose) |
| 200 |
|
pict_stats(); |
| 201 |
+ |
#endif |
| 202 |
+ |
if (n > 0) { /* process pending buffer */ |
| 203 |
+ |
rt_compute(rt_buf, n); |
| 204 |
+ |
while (n-- > 0) |
| 205 |
+ |
vb[buf_vh[n]+hsize] = luminance(rt_buf+3*n); |
| 206 |
+ |
} |
| 207 |
|
} |
| 208 |
|
|
| 209 |
|
|
| 213 |
|
{ |
| 214 |
|
static float nbuf[6] = {0.,0.,0.,0.,0.,0.}; |
| 215 |
|
|
| 216 |
+ |
#ifdef DEBUG |
| 217 |
|
if (verbose && np > 1) |
| 218 |
|
fprintf(stderr, "%s: sending %d samples to rtrace...\n", |
| 219 |
|
progname, np); |
| 220 |
+ |
#endif |
| 221 |
|
if (writebuf(fd_tort,(char *)pb,6*sizeof(float)*np) < 6*sizeof(float)*np |
| 222 |
|
|| writebuf(fd_tort,(char *)nbuf,sizeof(nbuf)) < sizeof(nbuf)) { |
| 223 |
|
fprintf(stderr, "%s: error writing to rtrace process\n", |
| 259 |
|
scanpos = (long *)malloc(pysiz*sizeof(long)); |
| 260 |
|
if (scanpos == NULL) |
| 261 |
|
memerr("scanline positions"); |
| 262 |
< |
for (i = 0; i < pysiz; i++) |
| 262 |
> |
for (i = pysiz-1; i >= 0; i--) |
| 263 |
|
scanpos[i] = -1L; |
| 264 |
+ |
curpos = pysiz-1; |
| 265 |
|
for (i = 0; i < NSCANS; i++) { |
| 266 |
|
scan[i].lused = -1; |
| 267 |
|
scan[i].y = -1; |
| 269 |
|
if (scan[i].sl == NULL) |
| 270 |
|
memerr("scanline buffers"); |
| 271 |
|
} |
| 255 |
– |
curpos = pysiz-1; |
| 272 |
|
} |
| 273 |
|
|
| 274 |
|
|
| 314 |
|
perror(progname); |
| 315 |
|
exit(1); |
| 316 |
|
} |
| 317 |
+ |
close(p0[0]); |
| 318 |
+ |
close(p1[1]); |
| 319 |
|
fd_tort = p0[1]; |
| 320 |
|
fd_fromrt = p1[0]; |
| 321 |
|
} |
