70 lines
2.5 KiB
OCaml
70 lines
2.5 KiB
OCaml
(***********************************************************************)
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(* *)
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(* MLTk, Tcl/Tk interface of OCaml *)
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(* *)
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(* Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis *)
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(* projet Cristal, INRIA Rocquencourt *)
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(* Jacques Garrigue, Kyoto University RIMS *)
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(* *)
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(* Copyright 2002 Institut National de Recherche en Informatique et *)
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(* en Automatique and Kyoto University. All rights reserved. *)
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(* This file is distributed under the terms of the GNU Library *)
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(* General Public License, with the special exception on linking *)
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(* described in file LICENSE found in the OCaml source tree. *)
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(* *)
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(***********************************************************************)
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(* Delayed global, a.k.a cache&carry *)
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let autodef f =
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let v = ref None in
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(function () ->
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match !v with
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None ->
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let x = f() in
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v := Some x;
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x
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| Some x -> x)
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open Camltk
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(* allows Data in options *)
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let create_photo options =
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let hasopt = ref None in
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(* Check options *)
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List.iter (function
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Data s ->
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begin match !hasopt with
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None -> hasopt := Some (Data s)
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| Some _ -> raise (Protocol.TkError "two data sources in options")
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end
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| File f ->
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begin match !hasopt with
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None -> hasopt := Some (File f)
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| Some _ -> raise (Protocol.TkError "two data sources in options")
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end
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| o -> ())
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options;
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match !hasopt with
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None -> raise (Protocol.TkError "no data source in options")
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| Some (Data s) ->
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begin
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let tmpfile = Filename.temp_file "img" "" in
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let oc = open_out_bin tmpfile in
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output_string oc s;
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close_out oc;
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let newopts =
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List.map (function
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| Data s -> File tmpfile
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| o -> o)
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options in
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try
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let i = Imagephoto.create newopts in
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(try Sys.remove tmpfile with Sys_error _ -> ());
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i
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with
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e ->
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(try Sys.remove tmpfile with Sys_error _ -> ());
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raise e
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end
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| Some (File s) -> Imagephoto.create options
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| _ -> assert false
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