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include <imhdr.h>
include <imset.h>
# SET_OUTPUT -- Setup the output image.
# The output image is a NEW_COPY of the input image.
# The user may select a pixel datatype with higher precision though not
# lower.
procedure set_output (in, out, output)
pointer in # Input IMIO pointer to copy
pointer out # Output IMIO pointer
char output[SZ_FNAME] # Output image name
int i, clscan(), nscan()
char type[1]
pointer immap()
errchk immap
begin
out = immap (output, NEW_COPY, in)
IM_PIXTYPE(out) = TY_REAL
if (clscan ("pixeltype") != EOF) {
call gargwrd (type, 1)
if (nscan() == 1) {
i = IM_PIXTYPE(in)
IM_PIXTYPE(out) = i
switch (type[1]) {
case 's':
if (i == TY_USHORT)
IM_PIXTYPE(out) = TY_SHORT
case 'u':
if (i == TY_SHORT)
IM_PIXTYPE(out) = TY_USHORT
case 'i':
if (i == TY_SHORT || i == TY_USHORT)
IM_PIXTYPE(out) = TY_INT
case 'l':
if (i == TY_SHORT || i == TY_USHORT || i == TY_INT)
IM_PIXTYPE(out) = TY_LONG
case 'r':
if (i != TY_DOUBLE)
IM_PIXTYPE(out) = TY_REAL
case 'd':
IM_PIXTYPE(out) = TY_DOUBLE
default:
call imunmap (out)
call error (0, "Unknown pixel type")
}
}
}
end
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