Initial commit

1 files changed, 45 insertions, 0 deletions

diff --git a/pkg/images/tv/imexamine/iegdata.x b/pkg/images/tv/imexamine/iegdata.x
new file mode 100644
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+++ b/pkg/images/tv/imexamine/iegdata.x
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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