-;; MLYM-OTF.flt -- Font Layout Table for Malayalam OpenType font
-;; Copyright (C) 2003, 2004, 2005, 2007
-;; 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.
+;; 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.
-;; 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.
+(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.
-(font layouter mlym-otf nil
- (font (nil nil unicode-bmp :otf=mlym=haln)))
+;; 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
-;; The first stage is to extract a syllable and re-order characters.
(category
- ;; C: consonant (except for BPR)
- ;; B: consonant that is the subject of "blws" feature
- ;; P: consonant that is the subject of "pstf" feature
- ;; R: consonant RA
- ;; H: HALANT (VIRAMA)
- ;; m: MATRA (Mpre)
- ;; p: MATRA (Mpost)
- ;; t: MATRA (two-part: Mpre+Mpost)
- ;; A: vowel modifier (post) (ANUSVARA and VISARGA)
- ;; V: independent vowel
- ;; N: ZWNJ (ZERO WIDTH NON-JOINER)
- ;; J: ZWJ (ZERO WIDTH JOINER)
- ;; E: else (all other independnt characters)
- (0x0D00 0x0D7F ?E) ; else
- (0x0D02 0x0D03 ?A) ; ANUSVARA & VISARGA
- (0x0D05 0x0D14 ?V) ; independent vowel
- (0x0D15 0x0D39 ?C) ; consonant
-
- ;; Accorind to www.microsoft.com/typography/otfntdev/indicot/appen.htm,
- ;; these must be classified into 'B' category, but at least, it
- ;; doesn't work with this font
- ;; http://www.supersoftweb.com/THOOLIUC.TTF
- ;;(0x0D1F ?B) ; TTA
- ;;(0x0D23 ?B) ; NNA
- ;;(0x0D26 ?B) ; DA
- (0x0D2F ?P) ; YA
- (0x0D30 ?R) ; RA
- (0x0D32 ?B) ; LA
- (0x0D35 ?P) ; VA
- (0x0D3E 0x0D43 ?p) ; dependent vowel (Mpost)
- (0x0D46 0x0D48 ?m) ; dependent vowel (Mpre)
- (0x0D4A 0x0D4C ?t) ; dependent vowel (two-part)
- (0x0D4D ?H) ; VIRAMA (HALANT)
- (0x0D57 ?p) ; dependent vowel (Mpost)
- (0x0D60 ?V) ; VOCALIC RR
- (0x0D61 ?V) ; VOCALIC LL
+ (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
- (0x0D7D ?x) ; marker inserted before base-C
- (0x0D7E ?y) ; marker inserted after base-C
- (0x0D7F ?z) ; marker inserted before last Ra
+ (0x25CC ?X) ; DOTTED CIRCLE
+
+ (pstf ?r)
)
-;; The 1st stage is to extract a syllable while moving a Halant
-;; following Cbase to the tail and partitioning two-part matras into
-;; parts.
+;; Stage 0
+;; Preprocessing
(generator
(0
(cond
- ;; If [CR]H is followed by ZWNJ/ZWJ, move ZWNJ/ZWJ) to the head so
- ;; that the later stages find it quickly.
- ("([CBPR]H)([NJ])"
- < | (2 =) (1 = =) | >)
-
- ;; A syllable starting with a consonant and ending with a vowel
- ;; and/or a vowel modifier.
- ("(([CBPR]H)*[CBPR])([pmt]A?|A)"
- < | (1 move-halant) (3 partition = =) | >)
-
- ;; A syllable starting with a consonant and ending without a vowel
- ;; nor a vowel modifier.
- ("(([CBPR]H)*[CBPR])(H)?"
- < | (1 move-halant) (3 =) | >)
-
- ;; A syllable starting with an independent vowel.
- ("(VA?)"
- < | (1 = *) | >)
-
- ;; Other independent character.
+ ;; 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 = *) |)
+
("." =))
*)
- ;; Move Halant to the tail if necessary. Insert 0x0D7D before Cbase,
- ;; 0x0D7E after Cbase, 0x0D7F before the tailing RH (if any). They
- ;; work as markers in the following stages.
- (move-halant
+ (reorder
(cond
- ;; In the first two cases, we don't have to move Halant.
- ("[BPR]$" ; Single consonant.
- 0x0D7D 0x0D7E =)
- ("(([CBPR]H)*)(C)$" ; Cbase is at tail.
- (1 = *) 0x0D7D (3 =) 0x0D7E)
- ;; In the following cases, we must move Halant to the tail.
- ("(([CBPR]H)*)([C])H(([BR]H)*)(R)$" ; Cbase is at head or middle.
- (1 = *) 0x0D7D (3 =) 0x0D7E (4 = *) 0x0D7F 0x0D30 0x0D4D)
- ("(([CBPR]H)*)([C])H(([BR]H)*[BP])$" ; Cbase is at head or middle.
- (1 = *) 0x0D7D (3 =) 0x0D7E (4 = *) 0x0D4D)
- ("(RH)?(.)H(.*)$" ; No Cbase, move the first
- ; Halant to the tail.
- (1 = *) 0x0D7D (2 = ) 0x0D7E (3 = *) 0x0D4D)))
-
- ;; Partition two-part matras into parts.
- (partition
+ ;; pref after pstf
+ ("(.|.+([^PJ]|JP))((J?HP)*J?HR)$"
+ (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)*)$"
+ (1 reorder-B *) (3 reorder-any *))))
+
+ (reorder-B
(cond
- ((0x0D4A) 0x0D46 0x0D3E)
- ((0x0D4B) 0x0D47 0x0D3E)
- ;; Unicode suggests this partitioning:
- ((0x0D4C) 0x0D46 0x0D57)
- ;; but it is questionable. Perhaps, this substitution is better.
- ;; ((0x0D4C) 0x0D57)
- )))
-
-;; The 2nd stage is to apply GSUB for prebase part.
+ ("J?(H)(B)"
+ (2 =) (1 =))
+ ("." =)))
+
+ (reorder-any
+ ("J?(H)(.)"
+ (2 =) (1 =)))
+ )
+
+;; Stage 3
+;; Language forms and matra reordering
(generator
(0
(cond
- ;; Originally [CBPR]H is followed by ZWNJ. Apply no feature (just
- ;; cmap).
- (" N([^ ]*) "
- (1 otf:mlym=+))
-
- ;; Originally [CBPR]H is followed by ZWJ. Apply only GSUB haln
- ;; feature.
- (" J([^ ]*) "
- (1 otf:mlym=haln+))
-
- ;; Syllable starting with a consonant should match this pattern.
- (" ([^ y]*)y([^ z]*)(z..)?([^ ]*) "
- |
- (1 otf:mlym=~blwf,~pstf,~blws,~psts,*+) ; Prebase part.
- 0x0D7E ; Preserve this marker.
- (2 = *) ; Postbase part.
- (3 = *) ; Optional tailing RH.
- (4 = *) ; Optional Mpost.
- |)
-
- ;; A syllable starting with an independent vowel.
- (" ([^ ]*) "
- (1 otf:mlym+))
-
- ;; Any other independent character. Apply no feature (just cmap).
- ("."
- [ otf:mlym=+ ] ))
- *))
+ ;; Overt halant forms
+ (" ([^ ]+)(HN) "
+ | (1 blwf-pstf) (2 = =) |)
+
+ ;; Other syllables
+ ;; 1 2 3
+ (" ([^mpA ]+)(m)?(p?A?) "
+ | (2 =) (1 blwf-pstf) (3 = *) |)
+
+ ("." =))
+ *)
-;; The 3rd stage is to move Mpre (if any) and tailing RH (if any)
-;; forward to just before the base consonant.
+ (blwf-pstf
+ (cond
+ ;;1 23 4
+ ("(.|.+BH|.+[^H])((PH)*)(RH)$"
+ (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
- (" ([^x]*)(.)xy([^ zm]*)(z(..))?(m)?([^ ]*) "
- | (1 = *) (4 (5 otf:mlym=pstf+)) (6 =) 0x0D7D (2 =) (3 = *) (7 = *) |)
- (" ([^x]*)x(.)y([^ zm]*)(z(..))?(m)?([^ ]*) "
- | (1 = *) (4 (5 otf:mlym=pstf+)) (6 =) 0x0D7D (2 =) (3 = *) (7 = *) |)
- (" xy([^ m]*)(m)?([^ ]*) "
- | (2 =) 0x0D7D (1 = *) (3 = *) |)
- ("[NJ]")
- ("."
- = ))
+ ;; 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 = *) |)
+
+ ("." =))
*))
-;; The 4th stage is to apply GSUB to postbase part.
+;; Stage 5
+;; Remove ZWNJ/ZWJ
(generator
(0
(cond
- (" ([^x]*)x(.H) "
- | (1 = *) (2 otf:mlym=haln) |)
- (" ([^x]*)x([^ ]*) "
- | (1 = *) (2 otf:mlym=~akhn,~haln,blwf,pstf,vatu,*+) |)
+ ("[NJ]")
+
("." =))
*))
-
-
-;; The 5th (last) stage is to apply GPOS features.
+;; Stage 6
+;; GPOS processing
(generator
(0
(cond
- (" ([^ ]*) " (1 otf:mlym=))
+ (" ([^ ]+) "
+ (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:
projects / m17n / m17n-db.git / blobdiff