static void
ra2ps(void) /* convert Radiance scanlines to 6-bit */
{
register COLR *scanin;
int y;
/* allocate scanline */
scanin = (COLR *)malloc(xmax*sizeof(COLR));
if (scanin == NULL)
quiterr("out of memory in ra2ps");
/* convert image */
for (y = ymax-1; y >= 0; y--) {
if (freadcolrs(scanin, xmax, stdin) < 0)
quiterr("error reading Radiance picture");
if (putprim == Cputprim || devgam != 1.) {
if (bradj) /* adjust exposure */
shiftcolrs(scanin, xmax, bradj);
colrs_gambs(scanin, xmax); /* gamma compression */
} else
normcolrs(scanin, xmax, bradj);
if (docolor) {
(*putprim)(scanin, RED);
(*putprim)(scanin, GRN);
(*putprim)(scanin, BLU);
} else
(*putprim)(scanin, GRY);
if (ferror(stdout))
quiterr("error writing PostScript file");
}
putchar('\n');
/* free scanline */
free((void *)scanin);
}
static void
getrow( /* get the specified row from our image */
int y
)
{
if (y == currow)
return;
if (y < currow) {
fseek(stdin, picstart, 0);
currow = -1;
}
do
if (freadcolrs(scanln, xmax, stdin) < 0) {
fprintf(stderr, "%s: error reading picture (y==%d)\n",
progname, ymax-1-y);
exit(1);
}
while (++currow < y);
if (bradj)
shiftcolrs(scanln, xmax, bradj);
colrs_gambs(scanln, xmax);
if (pixscan != NULL) {
if (samplefac)
neu_dith_colrs(pixscan, scanln, xmax);
else
dith_colrs(pixscan, scanln, xmax);
}
}
static void
ra2ppm( /* convert Radiance picture to 1-byte/sample Pixmap */
int binary,
int grey
)
{
COLR *scanin;
register int x;
int y;
/* allocate scanline */
scanin = (COLR *)malloc(xmax*sizeof(COLR));
if (scanin == NULL)
quiterr("out of memory in ra2ppm");
/* convert image */
for (y = ymax-1; y >= 0; y--) {
if (freadcolrs(scanin, xmax, stdin) < 0)
quiterr("error reading Radiance picture");
if (bradj)
shiftcolrs(scanin, xmax, bradj);
for (x = grey?xmax:0; x--; )
scanin[x][GRN] = normbright(scanin[x]);
colrs_gambs(scanin, xmax);
if (grey)
if (binary)
for (x = 0; x < xmax; x++)
putc(scanin[x][GRN], stdout);
else
for (x = 0; x < xmax; x++)
printf("%d\n", scanin[x][GRN]);
else
if (binary)
for (x = 0; x < xmax; x++) {
putc(scanin[x][RED], stdout);
putc(scanin[x][GRN], stdout);
putc(scanin[x][BLU], stdout);
}
else
for (x = 0; x < xmax; x++)
printf("%d %d %d\n", scanin[x][RED],
scanin[x][GRN],
scanin[x][BLU]);
if (ferror(stdout))
quiterr("error writing Pixmap");
}
/* free scanline */
free((void *)scanin);
}