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1 files changed, 58 insertions, 0 deletions

diff --git a/pkg/plot/t_prow.x b/pkg/plot/t_prow.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<gset.h>
+include	<mach.h>
+include	<imhdr.h>
+include	<mwset.h>
+
+# T_PROW -- Plot an image row.
+
+procedure t_prow ()
+
+pointer	image, wcslab, fmt
+pointer	im, mw, ct, sp, x_vec, y_vec
+int	row, ncols, nlines
+real	zmin, zmax
+int	clgeti()
+pointer	immap(), mw_openim(), mw_sctran()
+
+begin
+	call smark (sp)
+	call salloc (image, SZ_FNAME, TY_CHAR)
+	call salloc (wcslab, SZ_LINE, TY_CHAR)
+	call salloc (fmt, SZ_LINE, TY_CHAR)
+
+	# Open image
+	call clgstr ("image", Memc[image], SZ_FNAME)
+	im = immap (Memc[image], READ_ONLY, 0)
+	call clgstr ("wcs", Memc[wcslab], SZ_LINE)
+	mw = mw_openim (im)
+	call mw_seti (mw, MW_USEAXMAP, NO)
+	ct = mw_sctran (mw, "logical", Memc[wcslab], 0)
+
+	ncols  = IM_LEN(im,1)
+	nlines = IM_LEN(im,2)
+
+	row = clgeti ("row")
+	if (row < 1 || row > nlines) {
+	    call imunmap (im)
+	    call error (2, "line index references outside image")
+	}
+
+	# Get the requested row from the image.
+	call malloc (x_vec, ncols, TY_REAL)
+	call malloc (y_vec, ncols, TY_REAL)
+	call plt_grows (im, mw, ct, row, row, Memr[x_vec], Memr[y_vec],
+	    zmin, zmax, Memc[wcslab], Memc[fmt], SZ_LINE)
+
+	# Now draw the vector to the screen.
+	call pr_draw_vector (Memc[image], Memr[x_vec], Memr[y_vec], ncols,
+	    zmin, zmax, row, row, Memc[wcslab], Memc[fmt], false)
+       
+        # Free resources.
+	call mfree (x_vec, TY_REAL)
+	call mfree (y_vec, TY_REAL)
+
+	call imunmap (im)
+	call sfree (sp)
+end