1 files changed, 84 insertions, 0 deletions
diff --git a/tex/context/base/mlib-ctx.lua b/tex/context/base/mlib-ctx.lua
new file mode 100644
index 000000000..cc5682e6f
--- /dev/null
+++ b/tex/context/base/mlib-ctx.lua
@@ -0,0 +1,84 @@
+if not modules then modules = { } end modules ['mlib-ctx'] = {
+    version   = 1.001,
+    comment   = "companion to mlib-ctx.mkiv",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files",
+}
+
+-- todo
+
+local format, join = string.format, table.concat
+local sprint = tex.sprint
+
+local starttiming, stoptiming = statistics.starttiming, statistics.stoptiming
+
+metapost = metapost or {}
+metapost.defaultformat = "metafun"
+
+function metapost.graphic(instance,mpsformat,str,initializations,preamble,askedfig)
+    local mpx = metapost.format(instance,mpsformat or metapost.defaultformat)
+    metapost.graphic_base_pass(mpx,str,initializations,preamble,askedfig)
+end
+
+function metapost.getclippath(instance,mpsformat,data,initializations,preamble)
+    local mpx = metapost.format(instance,mpsformat or metapost.defaultformat)
+    if mpx and data then
+        starttiming(metapost)
+        starttiming(metapost.exectime)
+        local result = mpx:execute(format("%s;beginfig(1);%s;%s;endfig;",preamble or "",initializations or "",data))
+        stoptiming(metapost.exectime)
+        if result.status > 0 then
+            logs.report("metafun", "%s: %s", result.status, result.error or result.term or result.log)
+            result = nil
+        else
+            result = metapost.filterclippath(result)
+        end
+        stoptiming(metapost)
+        return result
+    end
+end
+
+function metapost.filterclippath(result)
+    if result then
+        local figures = result.fig
+        if figures and #figures > 0 then
+            local figure = figures[1]
+            local objects = figure:objects()
+            if objects then
+                local lastclippath
+                for o=1,#objects do
+                    local object = objects[o]
+                    if object.type == "start_clip" then
+                        lastclippath = object.path
+                    end
+                end
+                return lastclippath
+            end
+        end
+    end
+end
+
+function metapost.theclippath(...)
+    local result = metapost.getclippath(...)
+    if result then -- we could just print the table
+        result = join(metapost.flushnormalpath(result),"\n")
+        sprint(result)
+    end
+end
+
+statistics.register("metapost processing time", function()
+    local n =  metapost.n
+    if n > 0 then
+        local e, t = metapost.externals.n, statistics.elapsedtime
+        local str = format("%s seconds, loading: %s seconds, execution: %s seconds, n: %s",
+            t(metapost), t(mplib), t(metapost.exectime), n)
+        if e > 0 then
+            return format("%s, external: %s seconds (%s calls)", str, t(metapost.externals), e)
+        else
+            return str
+        end
+    else
+        return nil
+    end
+end)