1 files changed, 40 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/lpdf-res.lua b/tex/context/base/mkiv/lpdf-res.lua
new file mode 100644
index 000000000..d13fc798e
--- /dev/null
+++ b/tex/context/base/mkiv/lpdf-res.lua
@@ -0,0 +1,40 @@
+if not modules then modules = { } end modules ['lpdf-res'] = {
+    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 codeinjections  = backends.codeinjections
+local implement       = interfaces.implement
+
+local nuts            = nodes.nuts
+local tonut           = nodes.tonut
+
+local setfield        = nuts.setfield
+local setlist         = nuts.setlist
+
+local new_hlist       = nuts.pool.hlist
+
+local saveboxresource = tex.saveboxresource
+local useboxresource  = tex.useboxresource
+local getboxresource  = tex.getboxresourcedimensions
+
+function codeinjections.registerboxresource(n)
+    return saveboxresource(n,nil,lpdf.collectedresources,true) -- direct
+end
+
+function codeinjections.restoreboxresource(index)
+    local hbox = new_hlist()
+    local list, wd, ht, dp = useboxresource(index)
+    setlist(hbox,tonut(list))
+    setfield(hbox,"width",  wd)
+    setfield(hbox,"height", ht)
+    setfield(hbox,"depth",  dp)
+    return hbox -- so we return a nut !
+end
+
+function codeinjections.boxresourcedimensions(index)
+    return getboxresource(index)
+end