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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
# IE_GDATA -- Get image data with boundary checking.
pointer procedure ie_gdata (im, x1, x2, y1, y2)
pointer im # IMIO pointer
int x1, x2, y1, y2 # Subraster limits (input and output)
int i, nc, nl
pointer imgs2r()
errchk imgs2r
begin
nc = IM_LEN(im,1)
nl = IM_LEN(im,2)
if (IS_INDEFI (x1))
x1 = 1
if (IS_INDEFI (x2))
x2 = nc
if (IS_INDEFI (y1))
y1 = 1
if (IS_INDEFI (y2))
y2 = nl
i = max (x1, x2)
x1 = min (x1, x2)
x2 = i
i = max (y1, y2)
y1 = min (y1, y2)
y2 = i
if (x2 < 1 || x1 > nc || y2 < 1 || y1 > nl)
call error (1, "Pixels out of bounds")
x1 = max (1, x1)
x2 = min (nc, x2)
y1 = max (1, y1)
y2 = min (nl, y2)
return (imgs2r (im, x1, x2, y1, y2))
end
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