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(***********************************************************************)
(* *)
(* Active-DVI *)
(* *)
(* Projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 2002 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU Lesser General Public License. *)
(* *)
(* Jun Furuse, Didier Rmy and Pierre Weis. *)
(* Contributions by Roberto Di Cosmo, Didier Le Botlan, *)
(* Xavier Leroy, and Alan Schmitt. *)
(* *)
(* Based on Mldvi by Alexandre Miquel. *)
(***********************************************************************)
(* $Id: adviUnits.mli,v 1.1 2009/01/23 16:28:48 maranget Exp $ *)
type units =
| PT (* point *)
| PC (* pica: 1 pc = 12 pt *)
| IN (* inch: 1 in = 72.27 pt *)
| BP (* big point 72 bp = 1 in *)
| CM (* centimeter: 2.54 cm = 1 in *)
| MM (* millimeter: 10 mm = 1 cm *)
| DD (* didot point: 1157 dd = 1238 pt *)
| CC (* cicero: 1 cc = 12 dd *)
| SP ;; (* scaled point: 65536 sp = 1 pt *)
(* source: D. Knuth, The TeXbook, Addison-Wesley (C) 1986 *)
val ratio : units -> units -> int * int ;;
(* [ratio u1 u2] returns a pair of integers [(n1, n2)]
whose meaning is: n1 u1 equals n2 u2.
For example, [ratio IN CM] returns (50, 127), since
50 inches = 127 centimeters, that is 1 in = 2.54 cm.
The returned fraction n1/n2 is always irreducible. *)
val from_to : units -> units -> (float -> float) ;;
(* [from_to u1 u2] returns a function for converting
dimensions from u1 units to u2 units. *)
|