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include <error.h>
include <imhdr.h>
include <pkg/gtools.h>
include <smw.h>
# GETIMAGE -- Read new image pixels.
procedure getimage (image, nline, nband, nap, wave_scl, w0, wpc, units,
im, mw, sh, gt)
char image[ARB]
int nline, nband, nap
bool wave_scl
double w0, wpc
real a, b
char units[ARB]
pointer sp, imsect, im, mw, sh, gt
int da, n, sec[3,3], clgeti()
real gt_getr()
double shdr_lw()
pointer immap(), smw_openim()
errchk immap, shdr_open, shdr_system, un_changer
begin
call smark (sp)
call salloc (imsect, SZ_FNAME, TY_CHAR)
# Map the image if necessary. Don't allow image sections but
# determine requested spectrum from any explicit specification.
da = 0
if (im == NULL) {
call imgsection (image, Memc[imsect], SZ_FNAME)
call imgimage (image, image, SZ_FNAME)
im = immap (image, READ_ONLY, 0)
mw = smw_openim (im)
n = IM_NDIM(im)
if (Memc[imsect] != EOS) {
call amovki (1, sec[1,1], n)
call amovi (IM_LEN(im,1), sec[1,2], n)
call amovki (1, sec[1,3], n)
call id_section (Memc[imsect], sec[1,1], sec[1,2], sec[1,3], n)
switch (SMW_FORMAT(mw)) {
case SMW_ND:
if (n == 1)
da = 1
if (n == 2) {
if (abs (sec[1,2]-sec[1,1]) == 0) {
nline = sec[1,1]
da = 2
} else if (abs (sec[2,2]-sec[2,1]) == 0) {
nline = sec[2,1]
da = 1
}
} else {
if (abs (sec[1,2]-sec[1,1]) == 0) {
nline = sec[1,1]
if (abs (sec[2,2]-sec[2,1]) == 0) {
nband = sec[2,1]
if (abs (sec[3,2]-sec[3,1]) > 0)
da = 3
} else if (abs (sec[3,2]-sec[3,1]) == 0) {
nband = sec[3,1]
da = 2
}
} else if (abs (sec[2,2]-sec[2,1]) == 0) {
nline = sec[2,1]
if (abs (sec[3,2]-sec[3,1]) == 0) {
nband = sec[3,1]
da = 1
}
}
}
if (da > 0) {
call smw_daxis (mw, im, da, INDEFI, INDEFI)
call smw_saxis (mw, NULL, im)
}
default:
da = 1
if (n > 1 && abs (sec[2,2]-sec[2,1]) == 0)
nline = sec[2,1]
if (n > 2 && abs (sec[3,2]-sec[3,1]) == 0)
nband = sec[3,1]
}
}
}
# Get header info.
switch (SMW_FORMAT(mw)) {
case SMW_ND:
nap = INDEFI
n = SMW_LLEN(mw,2)
if (n > 1) {
if (nline == 0)
nline = max (1, min (n, clgeti ("line")))
} else
nline = 0
n = SMW_LLEN(mw,3)
if (n > 1) {
if (nband == 0)
nband = max (1, min (n, clgeti ("band")))
} else
nband = 0
default:
n = SMW_NSPEC(mw)
if (n > 1) {
if (nline == 0) {
nline = clgeti ("line")
nap = nline
}
} else {
nline = 0
nap = INDEFI
}
n = SMW_NBANDS(mw)
if (n > 1) {
if (nband == 0)
nband = max (1, min (n, clgeti ("band")))
} else
nband = 0
}
call shdr_open (im, mw, nline, nband, nap, SHDATA, sh)
nap = AP(sh)
nline = LINDEX(sh,1)
if (DC(sh) == DCNO && !IS_INDEFD(w0))
call usercoord (sh, 'l', 1D0, w0, 2D0, w0+wpc)
# Cancel wavelength coordinates if not desired or set units.
if (!wave_scl)
call shdr_system (sh, "physical")
else {
iferr (call shdr_units (sh, units))
;
}
if (da > 0) {
a = gt_getr (gt, GTXMIN)
b = gt_getr (gt, GTXMAX)
if (IS_INDEF(a) && IS_INDEF(b)) {
if (!wave_scl) {
call gt_setr (gt, GTXMIN, real(sec[da,1]))
call gt_setr (gt, GTXMAX, real(sec[da,2]))
} else {
a = shdr_lw (sh, double(sec[da,1]))
b = shdr_lw (sh, double(sec[da,2]))
call gt_setr (gt, GTXMIN, a)
call gt_setr (gt, GTXMAX, b)
}
}
}
# Make a title.
call mktitle (sh, gt)
call sfree (sp)
end
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