From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 sys/plio/plglr.gx | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 sys/plio/plglr.gx

(limited to 'sys/plio/plglr.gx')

diff --git a/sys/plio/plglr.gx b/sys/plio/plglr.gx
new file mode 100644
index 00000000..3a63346d
--- /dev/null
+++ b/sys/plio/plglr.gx
@@ -0,0 +1,44 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<plio.h>
+include	<plset.h>
+
+# PL_GLR -- Get a line segment as a range list, applying the given ROP to
+# combine the pixels with those of the output list.
+
+procedure pl_glr$t (pl, v, rl_dst, rl_depth, npix, rop)
+
+pointer	pl			#I mask descriptor
+long	v[PL_MAXDIM]		#I vector coords of line segment
+PIXEL	rl_dst[ARB]		#O output range list
+int	rl_depth		#I range list depth, bits
+int	npix			#I number of pixels desired
+int	rop			#I rasterop
+
+int	mr, nr
+pointer	sp, rl_out, rl_src, ll_src
+pointer	pl_access()
+int	pl_l2r$t()
+errchk	pl_access
+
+begin
+	ll_src = pl_access (pl,v)
+	if (!R_NEED_DST(rop))
+	    nr = pl_l2r$t (Mems[ll_src], v[1], rl_dst, npix)
+	else {
+	    call smark (sp)
+	    mr = min (RL_MAXLEN(pl), npix * 3)
+	    call salloc (rl_src, mr, TY_PIXEL)
+	    call salloc (rl_out, mr, TY_PIXEL)
+
+	    nr = pl_l2r$t (Mems[ll_src], v[1], Mem$t[rl_src], npix)
+	    call pl_rangerop$t (Mem$t[rl_src], 1, PL_MAXVAL(pl),
+			              rl_dst,  1, MV(rl_depth),
+				      Mem$t[rl_out], npix, rop)
+
+	     # Copy out the edited range list.
+	     call amov$t (Mem$t[rl_out], rl_dst, RL$T_LEN(rl_out))
+
+	    call sfree (sp)
+	}
+end
-- 
cgit