blob: 43541a555170ee2cde047968a19bbd97d40f465b (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <imhdr.h>
include "imfort.h"
# IMGL1R -- Get a line from an image of type short or real. Automatic
# datatype conversion from short to real is performed if necessary.
# It is illegal to reference out of bounds.
procedure imgl1r (im, buf, ier)
pointer im # image descriptor
real buf[ARB] # user data buffer
int ier
long offset
int nchars, npix
int bfread()
begin
npix = IM_LEN(im,1)
nchars = npix * IM_SZPIXEL(im)
# Compute offset into pixel file.
offset = IM_PIXOFF(im)
# Read one line of data.
if (nchars != bfread (IM_PIXFP(im), buf, nchars, offset)) {
ier = IE_RDPIX
call im_seterrim (ier, im)
return
}
# Swap bytes if necessary.
call imswap (im, buf, nchars)
# Convert the datatype if necessary.
if (IM_PIXTYPE(im) == TY_SHORT)
call achtsr (buf, buf, npix)
ier = OK
end
|
