1 files changed, 122 insertions, 0 deletions
diff --git a/sys/plio/plsaveim.x b/sys/plio/plsaveim.x
new file mode 100644
index 00000000..8e1b4b54
--- /dev/null
+++ b/sys/plio/plsaveim.x
@@ -0,0 +1,122 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<syserr.h>
+include	<imhdr.h>
+include	<imset.h>
+include	<mach.h>
+include	<plset.h>
+include	<plio.h>
+
+# PL_SAVEIM -- Save a mask in a conventional image, i.e., convert a mask to
+# an image.
+
+procedure pl_saveim (pl, imname, title, flags)
+
+pointer	pl			#I mask descriptor
+char	imname[ARB]		#I image name or section
+char	title[ARB]		#I mask "title" string
+int	flags			#I bitflags
+
+bool	sampling
+pointer	im, px, im_pl, bp
+int	npix, naxes, depth, maxdim, mode, i, locstr, locmem
+long	v_in[PL_MAXDIM], v_out[PL_MAXDIM], vn[PL_MAXDIM]
+long	vs_l[PL_MAXDIM], vs_p[PL_MAXDIM]
+long	ve_l[PL_MAXDIM], ve_p[PL_MAXDIM]
+
+pointer	immap()
+long	clktime()
+int	impnli(), imaccess(), imstati(), strlen()
+errchk	immap, syserrs, impnli
+
+begin
+	# Open the new output image.
+	mode = NEW_IMAGE
+	if (and (flags, PL_UPDATE) != 0)
+	    if (imaccess (imname, 0) == YES)
+		mode = READ_WRITE
+
+	im = immap (imname, mode, 0)
+
+	# Reload the image header from the "title" string, if any.
+	if (strlen(title) > 0) {
+	    call zlocva (title, locstr)
+	    call zlocva (Memc, locmem)
+	    bp = locstr - locmem + 1
+	    call im_pmldhdr (im, bp)
+	}
+
+	# Initialize a new image to the size of the mask.  If updating an
+	# existing image the sizes must match.
+
+	call pl_gsize (pl, naxes, vn, depth)
+	maxdim = min (IM_MAXDIM, PL_MAXDIM)
+	npix = vn[1]
+
+	if (mode == NEW_IMAGE) {
+	    IM_NDIM(im) = naxes
+	    IM_PIXTYPE(im) = TY_SHORT
+	    if (PL_MAXVAL(pl) > MAX_SHORT)
+		IM_PIXTYPE(im) = TY_INT
+	    call amovl (vn, IM_LEN(im,1), maxdim)
+	} else {
+	    if (naxes != IM_NDIM(im)) {
+		call imunmap (im)
+		call syserrs (SYS_IMPLSIZE, imname)
+	    }
+	    do i = 1, naxes
+		if (vn[i] != IM_LEN(im,i)) {
+		    call imunmap (im)
+		    call syserrs (SYS_IMPLSIZE, imname)
+		}
+	}
+
+	# If the image is already a mask internally, check whether any
+	# subsampling, axis flipping, or axis mapping is in effect.
+	# If so we can't use PLIO to copy the mask section.
+
+	im_pl = imstati (im, IM_PLDES)
+	sampling = false
+
+	if (im_pl != NULL) {
+	    call amovkl (long(1), vs_l, maxdim)
+	    call amovl (IM_LEN(im,1), ve_l, maxdim)
+	    call imaplv (im, vs_l, vs_p, maxdim)
+	    call imaplv (im, ve_l, ve_p, maxdim)
+
+	    do i = 1, maxdim {
+		vn[i] = ve_l[i] - vs_l[i] + 1
+		if (vn[i] != ve_p[i] - vs_p[i] + 1) {
+		    sampling = true
+		    break
+		}
+	    }
+	}
+
+	# If the source image is already a mask internally and no axis
+	# geometry is in effect in the image section (if any), then we can
+	# use a PLIO rasterop to efficiently copy the mask subsection.
+
+	if (im_pl != NULL && !sampling) {
+	    # Copy a mask subsection (or entire image if no section).
+	    call pl_rop (pl, vs_l, im_pl, vs_p, vn, PIX_SRC)
+	    call pl_compress (im_pl)
+
+	} else {
+	    # Copy image pixels.  Initialize the vector loop indices.
+	    call amovkl (long(1), v_in, maxdim)
+	    call amovkl (long(1), v_out, maxdim)
+
+	    # Copy the image.
+	    while (impnli (im, px, v_out) != EOF) {
+		call pl_glpi (pl, v_in, Memi[px], 0, npix, PIX_SRC)
+		call amovl (v_out, v_in, maxdim)
+	    }
+	}
+
+	IM_MIN(im) = 0
+	IM_MAX(im) = PL_MAXVAL(pl)
+	IM_LIMTIME(im) = clktime(0)
+
+	call imunmap (im)
+end