1 files changed, 111 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/libs-imp-ghostscript.lua b/tex/context/base/mkiv/libs-imp-ghostscript.lua
new file mode 100644
index 000000000..b129a58c1
--- /dev/null
+++ b/tex/context/base/mkiv/libs-imp-ghostscript.lua
@@ -0,0 +1,111 @@
+if not modules then modules = { } end modules ['libs-imp-ghostscript'] = {
+    version   = 1.001,
+    comment   = "companion to luat-lib.mkxl",
+    author    = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
+    copyright = "PRAGMA ADE / ConTeXt Development Team",
+    license   = "see context related readme files",
+}
+
+local libname = "ghostscript"
+local libfile = "gsdll64" -- what on unix?
+
+local gslib = resolvers.libraries.validoptional(libname)
+
+if not gslib then return end
+
+local function okay()
+    if resolvers.libraries.optionalloaded(libname,libfile) then
+        okay = function() return true end
+    else
+        okay = function() return false end
+    end
+    return okay()
+end
+
+local insert = table.insert
+local formatters = string.formatters
+
+local ghostscript     = utilities.ghostscript or { }
+utilities.ghostscript = ghostscript
+
+local gs_execute = gslib.execute
+local nofruns    = 0
+local report     = logs.reporter(libname)
+
+function ghostscript.convert(specification)
+    if okay() then
+        --
+        nofruns = nofruns + 1
+        statistics.starttiming(ghostscript)
+        --
+        local inputname = specification.inputname
+        if not inputname or inputname == "" then
+            report("invalid run %s, no inputname specified",nofruns)
+            statistics.stoptiming(ghostscript)
+            return false
+        end
+        local outputname = specification.outputname
+        if not outputname or outputname == "" then
+            outputname = file.replacesuffix(inputname,"pdf")
+        end
+        --
+        if not lfs.isfile(inputname) then
+            report("invalid run %s, input file %a is not found",nofruns,inputname)
+            statistics.stoptiming(ghostscript)
+            return false
+        end
+        --
+        local device = specification.device
+        if not device or device == "" then
+            device = "pdfwrite"
+        end
+        --
+        local code = specification.code
+        if not code or code == "" then
+            code = ".setpdfwrite"
+        end
+        --
+        local options = specification.options or { }
+        --
+        insert(options,"-dNOPAUSE")
+        insert(options,"-dBATCH")
+        insert(options,"-dSAFER")
+        insert(options,formatters["-sDEVICE=%s"](device))
+        insert(options,formatters["-sOutputFile=%s"](outputname))
+        insert(options,"-c")
+        insert(options,code)
+        insert(options,"-f")
+        insert(options,inputname)
+        --
+        report("run %s, input file %a, outputfile %a",nofruns,inputname,outputname)
+        report("")
+        local done = gslib_execute(options)
+        report("")
+        --
+        statistics.stoptiming(ghostscript)
+        if done then
+            return outputname
+        else
+            report("run %s quit with errors",nofruns)
+            return false
+        end
+    end
+end
+
+function ghostscript.statistics(report)
+    local runtime = statistics.elapsedtime(ghostscript)
+    if report then
+        report("nofruns %s, runtime %s",nofruns,runtime)
+    else
+        return {
+            runtime = runtime,
+            nofruns = nofruns,
+        }
+    end
+end
+
+-- for i=1,100 do
+--     ghostscript.convert { inputname = "temp.eps" }
+--     ghostscript.convert { inputname = "t:/escrito/tiger.eps" }
+-- end
+-- ghostscript.statistics(true)