1 files changed, 50 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/lpdf-vfc.lua b/tex/context/base/mkiv/lpdf-vfc.lua
new file mode 100644
index 000000000..5c1937ab9
--- /dev/null
+++ b/tex/context/base/mkiv/lpdf-vfc.lua
@@ -0,0 +1,50 @@
+if not modules then modules = { } end modules ['lpdf-vfc'] = {
+    version   = 1.001,
+    comment   = "companion to lpdf-ini.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files"
+}
+
+local setmetatableindex = table.setmetatableindex
+local formatters = string.formatters
+
+local bp  = number.dimenfactors.bp
+local r   = 16384 * bp
+local f_1 = formatters["%.6F w 0 %.6F %.6F %.6F re f"]
+local f_2 = formatters["[] 0 d 0 J %.6F w %.6F %.6F %.6F %.6F re S"]
+
+local vfspecials = backends.pdf.tables.vfspecials
+
+vfspecials.backgrounds = setmetatableindex(function(t,h)
+    local h = h * bp
+    local v = setmetatableindex(function(t,d)
+        local d = d * bp
+        local v = setmetatableindex(function(t,w)
+            local v = { "pdf", "origin", f_1(r,-d,w*bp,h+d) }
+            t[w] = v
+            return v
+        end)
+        t[d] = v
+        return v
+    end)
+    t[h] = v
+    return v
+end)
+
+vfspecials.outlines = setmetatableindex(function(t,h)
+    local h = h * bp
+    local v = setmetatableindex(function(t,d)
+        local d = d * bp
+        local v = setmetatableindex(function(t,w)
+            -- the frame goes through the boundingbox
+            local v = { "pdf", "origin", f_2(r,r/2,-d+r/2,w*bp-r,h+d-r) }
+            t[w] = v
+            return v
+        end)
+        t[d] = v
+        return v
+    end)
+    t[h] = v
+    return v
+end)