| 18 |
|
#else |
| 19 |
|
#include <signal.h> |
| 20 |
|
#endif |
| 21 |
+ |
#include <fcntl.h> |
| 22 |
|
|
| 23 |
|
#include "view.h" |
| 24 |
|
|
| 101 |
|
render(zfile, oldfile) /* render the scene */ |
| 102 |
|
char *zfile, *oldfile; |
| 103 |
|
{ |
| 104 |
+ |
extern long lseek(); |
| 105 |
|
COLOR *scanbar[MAXDIV+1]; /* scanline arrays of pixel values */ |
| 106 |
|
float *zbar[MAXDIV+1]; /* z values */ |
| 107 |
|
int ypos; /* current scanline */ |
| 108 |
< |
FILE *zfp; |
| 108 |
> |
int ystep; /* current y step size */ |
| 109 |
> |
int zfd; |
| 110 |
|
COLOR *colptr; |
| 111 |
|
float *zptr; |
| 112 |
|
register int i; |
| 123 |
|
} |
| 124 |
|
/* open z file */ |
| 125 |
|
if (zfile != NULL) { |
| 126 |
< |
if ((zfp = fopen(zfile, "a+")) == NULL) { |
| 126 |
> |
if ((zfd = open(zfile, O_WRONLY|O_CREAT, 0666)) == -1) { |
| 127 |
|
sprintf(errmsg, "cannot open z file \"%s\"", zfile); |
| 128 |
|
error(SYSTEM, errmsg); |
| 129 |
|
} |
| 133 |
|
goto memerr; |
| 134 |
|
} |
| 135 |
|
} else { |
| 136 |
< |
zfp = NULL; |
| 136 |
> |
zfd = -1; |
| 137 |
|
for (i = 0; i <= psample; i++) |
| 138 |
|
zbar[i] = NULL; |
| 139 |
|
} |
| 141 |
|
fputresolu(YMAJOR|YDECR, hresolu, vresolu, stdout); |
| 142 |
|
/* recover file and compute first */ |
| 143 |
|
i = salvage(oldfile); |
| 144 |
< |
if (zfp != NULL && fseek(zfp, (long)i*hresolu*sizeof(float), 0) == EOF) |
| 144 |
> |
if (zfd != -1 && lseek(zfd, (long)i*hresolu*sizeof(float), 0) == -1) |
| 145 |
|
error(SYSTEM, "z file seek error in render"); |
| 146 |
|
ypos = vresolu-1 - i; |
| 147 |
|
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
| 148 |
+ |
ystep = psample; |
| 149 |
|
/* compute scanlines */ |
| 150 |
< |
for (ypos -= psample; ypos >= 0; ypos -= psample) { |
| 151 |
< |
|
| 152 |
< |
pctdone = 100.0*(vresolu-ypos-psample)/vresolu; |
| 153 |
< |
|
| 154 |
< |
colptr = scanbar[psample]; /* move base to top */ |
| 155 |
< |
scanbar[psample] = scanbar[0]; |
| 150 |
> |
for (ypos -= ystep; ypos > -ystep; ypos -= ystep) { |
| 151 |
> |
/* record progress */ |
| 152 |
> |
pctdone = 100.0*(vresolu-1-ypos-ystep)/vresolu; |
| 153 |
> |
/* bottom adjust? */ |
| 154 |
> |
if (ypos < 0) { |
| 155 |
> |
ystep += ypos; |
| 156 |
> |
ypos = 0; |
| 157 |
> |
} |
| 158 |
> |
colptr = scanbar[ystep]; /* move base to top */ |
| 159 |
> |
scanbar[ystep] = scanbar[0]; |
| 160 |
|
scanbar[0] = colptr; |
| 161 |
< |
zptr = zbar[psample]; |
| 162 |
< |
zbar[psample] = zbar[0]; |
| 161 |
> |
zptr = zbar[ystep]; |
| 162 |
> |
zbar[ystep] = zbar[0]; |
| 163 |
|
zbar[0] = zptr; |
| 164 |
|
/* fill base line */ |
| 165 |
|
fillscanline(scanbar[0], zbar[0], hresolu, ypos, psample); |
| 166 |
|
/* fill bar */ |
| 167 |
< |
fillscanbar(scanbar, zbar, hresolu, ypos, psample); |
| 167 |
> |
fillscanbar(scanbar, zbar, hresolu, ypos, ystep); |
| 168 |
|
/* write it out */ |
| 169 |
< |
for (i = psample; i > 0; i--) { |
| 170 |
< |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),hresolu,zfp) != hresolu) |
| 169 |
> |
for (i = ystep; i > 0; i--) { |
| 170 |
> |
if (zfd != -1 && write(zfd, (char *)zbar[i], |
| 171 |
> |
hresolu*sizeof(float)) |
| 172 |
> |
< hresolu*sizeof(float)) |
| 173 |
|
goto writerr; |
| 174 |
< |
if (fwritescan(scanbar[i],hresolu,stdout) < 0) |
| 174 |
> |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
| 175 |
|
goto writerr; |
| 176 |
|
} |
| 167 |
– |
if (zfp != NULL && fflush(zfp) == EOF) |
| 168 |
– |
goto writerr; |
| 177 |
|
if (fflush(stdout) == EOF) |
| 178 |
|
goto writerr; |
| 179 |
|
} |
| 172 |
– |
/* compute residual */ |
| 173 |
– |
colptr = scanbar[psample]; |
| 174 |
– |
scanbar[psample] = scanbar[0]; |
| 175 |
– |
scanbar[0] = colptr; |
| 176 |
– |
zptr = zbar[psample]; |
| 177 |
– |
zbar[psample] = zbar[0]; |
| 178 |
– |
zbar[0] = zptr; |
| 179 |
– |
if (ypos > -psample) { |
| 180 |
– |
fillscanline(scanbar[-ypos], zbar[-ypos], hresolu, 0, psample); |
| 181 |
– |
fillscanbar(scanbar-ypos, zbar-ypos, hresolu, 0, psample+ypos); |
| 182 |
– |
} |
| 183 |
– |
for (i = psample; i+ypos >= 0; i--) { |
| 184 |
– |
if (zfp != NULL && fwrite(zbar[i],sizeof(float),hresolu,zfp) != hresolu) |
| 185 |
– |
goto writerr; |
| 186 |
– |
if (fwritescan(scanbar[i], hresolu, stdout) < 0) |
| 187 |
– |
goto writerr; |
| 188 |
– |
} |
| 180 |
|
/* clean up */ |
| 181 |
< |
if (zfp != NULL) { |
| 182 |
< |
if (fclose(zfp) == EOF) |
| 181 |
> |
if (zfd != -1) { |
| 182 |
> |
if (write(zfd, (char *)zbar[0], hresolu*sizeof(float)) |
| 183 |
> |
< hresolu*sizeof(float)) |
| 184 |
|
goto writerr; |
| 185 |
+ |
close(zfd); |
| 186 |
|
for (i = 0; i <= psample; i++) |
| 187 |
|
free((char *)zbar[i]); |
| 188 |
|
} |
| 189 |
+ |
fwritescan(scanbar[0], hresolu, stdout); |
| 190 |
|
if (fflush(stdout) == EOF) |
| 191 |
|
goto writerr; |
| 192 |
|
for (i = 0; i <= psample; i++) |
| 212 |
|
z = pixvalue(scanline[0], 0, y); |
| 213 |
|
if (zline) zline[0] = z; |
| 214 |
|
|
| 215 |
< |
for (i = xstep; i < xres; i += xstep) { |
| 216 |
< |
|
| 215 |
> |
for (i = xstep; i < xres-1+xstep; i += xstep) { |
| 216 |
> |
if (i >= xres) { |
| 217 |
> |
xstep += xres-1-i; |
| 218 |
> |
i = xres-1; |
| 219 |
> |
} |
| 220 |
|
z = pixvalue(scanline[i], i, y); |
| 221 |
|
if (zline) zline[i] = z; |
| 222 |
|
|
| 223 |
|
b = fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
| 224 |
|
i-xstep, y, xstep, 0, b/2); |
| 228 |
– |
} |
| 229 |
– |
if (i-xstep < xres-1) { |
| 230 |
– |
z = pixvalue(scanline[xres-1], xres-1, y); |
| 231 |
– |
if (zline) zline[xres-1] = z; |
| 232 |
– |
fillsample(scanline+i-xstep, zline ? zline+i-xstep : NULL, |
| 233 |
– |
i-xstep, y, xres-1-(i-xstep), 0, b/2); |
| 225 |
|
} |
| 226 |
|
} |
| 227 |
|
|
