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;; MLYM-OTF.flt -- Font Layout Table for Malayalam OpenType fonts
;; Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010 AIST (H15PRO112)
;; See the end for copying conditions.
(font layouter mlym-otf nil
(version "1.6.0")
(font (nil nil unicode-bmp :otf=mlym)))
;;; <li> MLYM-OTF.flt
;;;
;;; For Malayalam OpenType fonts to draw the reformed Malayalam script.
;; AnjaliOldLipi.ttf, Dyuthi3.ttf, Meera_04.ttf, Rachana_04.ttf, suruma2.ttf
;; blwf: 0d32
;; pstf: 0d2f 0d30 0d35
;; RaghuMalayalamSans2.ttf
;; blwf: 0d32
;; pstf: 0d2f 0d30 0d35 0d41
;; lohit_ml.ttf
;; blwf: 0d32
;; pstf: 0d2f 0d30 0d31 0d35 0d41
;; Kalyani121.ttf
;; blwf: N/A
;; pstf: 0d2f 0d30 0d32 0d35 0d41
(category
(0x0D00 0x0D7F ?X) ; generic
(0x0D02 0x0D03 ?A) ; SIGN ANUSVARA .. VISARGA
(0x0D05 0x0D14 ?V) ; LETTER A .. AU
(0x0D15 0x0D39 ?C) ; LETTER KA .. HA
(0x0D2F ?P) ; LETTER YA
(0x0D30 ?R) ; LETTER RA
(0x0D32 ?B) ; LETTER LA
(0x0D35 ?P) ; LETTER VA
(0x0D3E 0x0D44 ?p) ; VOWEL SIGN AA .. VOCALIC RR
(0x0D46 0x0D48 ?m) ; VOWEL SIGN E .. AI
(0x0D4D ?H) ; SIGN VIRAMA
(0x0D57 ?p) ; AU LENGTH MARK
(0x0D60 0x0D61 ?V) ; LETTER VOCALIC RR .. VOCALIC LL
(0x0D62 0x0D63 ?b) ; VOWEL SIGN VOCALIC L .. LL
(0x200C ?N) ; ZWNJ
(0x200D ?J) ; ZWJ
(0x25CC ?X) ; DOTTED CIRCLE
(pstf ?r)
)
;; Stage 0
;; Preprocessing
(generator
(0
(cond
;; Decompose two-part vowel signs
((0x0D4A) 0x0D46 0x0D3E)
((0x0D4B) 0x0D47 0x0D3E)
((0x0D4C) 0x0D46 0x0D57)
("." =))
*))
;; Stage 1
;; Syllable identification
(generator
(0
(cond
;; Consonant-based syllables
;;1 23 4
("([CBPR]((J?H|HJ?)[CBPR])*)(H[NJ]?|m?p?A?)"
< |
(cond
(".+HJ$" :otf=mlym=nukt,akhn+)
("(.+)(H)N?$" (1 :otf=mlym=nukt,akhn+) (2 =) 0x200C)
(".+" :otf=mlym=nukt,akhn+))
| >)
;; Syllables with an independent vowel
("V(J?H[BPR])?m?p?A?"
< | = * | >)
;; Two-part vowel signs
((0x0D46 0x0D3E)
(cond
((font-facility 0x25CC) < = 0x25CC = >)
(".+" [ 0x0D4A ])))
((0x0D47 0x0D3E)
(cond
((font-facility 0x25CC) < = 0x25CC = >)
(".+" [ 0x0D4B ])))
((0x0D46 0x0D57)
(cond
((font-facility 0x25CC) < = 0x25CC = >)
(".+" [ 0x0D4C ])))
;; Combining marks are displayed with a DOTTED CIRCLE.
("m"
(cond
((font-facility 0x25CC) < = 0x25CC >)
("." [ = ])))
("[HbpA]"
(cond
((font-facility 0x25CC) < 0x25CC = >)
("." [ = ])))
;; Isolated blwf and pstf are displayed with a DOTTED CIRCLE in the
;; next stage.
("(J)(H)([BPR])"
< | (1 =) (3 =) (2 =) | >)
("." =))
*))
;; Stage 2
;; Reorder halant for blwf and pstf
(generator
(0
(cond
;; Isolated blwf and pstf
(" J([BP]H) "
(cond
((font-facility 0x25CC) < 0x25CC (1 :otf=mlym=blwf,pstf+) >)
(" J([BP]H) " [ (1 :otf=mlym=blwf,pstf+) ])))
;; Isolated pref
(" J(RH) "
(cond
((font-facility 0x25CC) < (1 :otf=mlym=pstf+) 0x25CC >)
(" J(RH) " [ (1 :otf=mlym=pstf+) ])))
;; Overt halnt forms
(" ([^ ]+)(HN) "
| (1 reorder) (2 = =) |)
;; Ordinary syllables
(" ([^mbpA ]+)(m?p?A?) "
| (1 reorder) (2 = *) |)
("." =))
*)
(reorder
(cond
;; pref after pstf
("(.|.+([^PJ]|JP))((J?HP)*J?HR)$"
(1 reorder-B *) (3 reorder-any *))
;; pref between blwf and pstf
("(.*[^J])(J?HR(J?HP)+)$"
(1 reorder-B *) (2 reorder-any *))
;; pref before blwf
("(.*[^J])(J?HR(J?HB)+(J?HP)*)$"
(1 reorder-B *) (2 reorder-any *))
;; no pref
("(.|.+([^PJ]|JP|HJ))((J?HP)*)$"
(1 reorder-B *) (3 reorder-any *))))
(reorder-B
(cond
("J?(H)(B)"
(2 =) (1 =))
("." =)))
(reorder-any
("J?(H)(.)"
(2 =) (1 =)))
)
;; Stage 3
;; Language forms and matra reordering
(generator
(0
(cond
;; Overt halant forms
(" ([^ ]+)(HN) "
| (1 blwf-pstf) (2 = =) |)
;; Other syllables
;; 1 2 3
(" ([^mpA ]+)(m)?(p?A?) "
| (2 =) (1 blwf-pstf) (3 = *) |)
("." =))
*)
(blwf-pstf
(cond
;;1 23 4
("(.|.+BH|.+[^H])((PH)*)(RH)$"
(4 :otf=mlym=pstf) (1 :otf=mlym=blwf+) (2 :otf=mlym=pstf+))
;;1 2 3
("(.*)(RH)((PH)+)$"
(2 :otf=mlym=pstf+) (1 :otf=mlym=blwf+) (3 :otf=mlym=pstf+))
;;1 2 34 5
("(.*)(RH)((BH)+)((PH)*)$"
(2 :otf=mlym=pstf+) (1 :otf=mlym=blwf+) (3 :otf=mlym=blwf+)
(5 :otf=mlym=pstf+))
;;1 2
("(.|.+BH|.+[^H])((PH)*)$"
(1 :otf=mlym=blwf+) (2 :otf=mlym=pstf+))))
)
;; Stage 4
;; Final reordering (Move pre-base matra and pref after the last halant)
(generator
(0
(cond
;; With a pref, one or more intermediate- and a final overt halant forms.
;; 1 2 3
(" (r)([^ ]+HJ?)([^H ]+HN) "
| (2 = *) (1 =) (3 = *) |)
;; With a pref and a final overt halant form. Don't move the pref.
(" r[^H ]+HN "
= *)
;; 1 2 3
(" (m?r?)([^ ]+HJ?)([^H ]+) "
| (2 = *) (1 = *) (3 = *) |)
("." =))
*))
;; Stage 5
;; Remove ZWNJ/ZWJ
(generator
(0
(cond
("[NJ]")
("." =))
*))
;; Stage 6
;; GPOS processing
(generator
(0
(cond
(" ([^ ]+) "
(1 :otf=mlym=+abvm,blwm,dist))
("." =))
*))
;; Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010
;; National Institute of Advanced Industrial Science and Technology (AIST)
;; Registration Number H15PRO112
;; This file is part of the m17n database; a sub-part of the m17n
;; library.
;; The m17n library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public License
;; as published by the Free Software Foundation; either version 2.1 of
;; the License, or (at your option) any later version.
;; The m17n library is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; Lesser General Public License for more details.
;; You should have received a copy of the GNU Lesser General Public
;; License along with the m17n library; if not, write to the Free
;; Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;; Local Variables:
;; mode: emacs-lisp
;; End: