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;; KNDA-OTF.flt -- Font Layout Table for Kannada OpenType fonts
;; Copyright (C) 2004, 2007, 2010 AIST (H15PRO112)
;; See the end for copying conditions.
(font layouter knda-otf nil
(version "1.6.0")
(font (nil nil unicode-bmp :otf=knda)))
;;; <li> KNDA-OTF.flt
;;;
;;; For Kannada OpenType fonts to draw the Kannada script.
(category
;; b: before subscript matras
;; a: after subscript matras
(0x0C80 0x0CFF ?X) ; generic
(0x0C82 0x0C83 ?A) ; SIGN ANUSVARA .. VISARGA
(0x0C85 0x0C94 ?V) ; LETTER A .. LETTER AU
(0x0C95 0x0CB9 ?C) ; LETTER KA .. LETTER HA
(0x0CB0 ?R) ; LETTER RA
(0x0CBC ?n) ; SIGN NUKTA
(0x0CBE 0x0CBF ?b) ; VOWEL SIGN AA .. I
(0x0CC1 0x0CC2 ?b) ; VOWEL SIGN U .. UU
(0x0CC3 0x0CC4 ?a) ; VOWEL SIGN VOCALIC R .. VOCALIC RR
(0x0CC6 ?b) ; VOWEL SIGN E
(0x0CCC ?b) ; VOWEL SIGN AU
(0x0CCD ?H) ; SIGN VIRAMA
(0x0CD5 0x0CD6 ?a) ; LENGTH MARK .. AI LENGTH MARK
(0x0CDE ?C) ; LETTER FA (LLLA)
(0x0CE0 0x0CE1 ?V) ; LETTER VOCALIC RR .. VOCALIC LL
(0x0CE2 0x0CE3 ?b) ; VOWEL SIGN VOCALIC L .. VOCALIC LL
(0x200C ?N) ; ZWNJ
(0x200D ?J) ; ZWJ
(0x25CC ?X) ; DOTTED CIRCLE
(blwf ?B)
(rphf ?r)
)
;; Stage 0
;; Preprocessing
(generator
(0
(cond
;; Decompose multi-part vowel signs.
((0x0CC0)
0x0CBF 0x0CD5)
((0x0CC7)
0x0CC6 0x0CD5)
((0x0CC8)
0x0CC6 0x0CD6)
((0x0CCA)
0x0CC6 0x0CC2)
((0x0CCB)
0x0CC6 0x0CC2 0x0CD5)
("." =))
*))
;; Stage 1
;; Syllable identification
(generator
(0
(cond
;; Syllables with an independent vowel
("(RH)?(Vn?)((J?H[CR])?b?b?a?A?)"
< | (1 = =) (2 :otf=knda=nukt+) (3 = *) | >)
;; Consonant-based syllables
;;1 23 4
("([CR]n?((J?H|HJ?)[CR]n?)*)(H[NJ]?|b?b?a?n?A?)"
< |
(cond
(".+HJ$" :otf=knda=nukt,akhn+)
("(.+)(H)N?$" (1 :otf=knda=nukt,akhn+) (2 =) 0x200C)
(".+" :otf=knda=nukt,akhn+))
| >)
;; Multi-part vowel signs
((0x0CBF 0x0CD5)
(cond
((font-facility 0x25CC) < 0x25CC = = >)
(".+" [ 0x0CC0 ])))
((0x0CC6 0x0CD5)
(cond
((font-facility 0x25CC) < 0x25CC = = >)
(".+" [ 0x0CC7 ])))
((0x0CC6 0x0CD6)
(cond
((font-facility 0x25CC) < 0x25CC = = >)
(".+" [ 0x0CC8 ])))
((0x0CC6 0x0CC2 0x0CD5)
(cond
((font-facility 0x25CC) < 0x25CC = = = >)
(".+" [ 0x0CCB ])))
((0x0CC6 0x0CC2)
(cond
((font-facility 0x25CC) < 0x25CC = = >)
(".+" [ 0x0CCA ])))
;; Combining marks are displayed with a DOTTED CIRCLE.
("[nHbaA]"
(cond
((font-facility 0x25CC) < 0x25CC = >)
("." [ = ])))
;; Isolated blwf is displayed with a DOTTED CIRCLE in the
;; next stage.
("(J)(H)([CR])"
< | (1 =) (3 =) (2 =) | >)
("." =))
*))
;; Stage 2
;; Reorder halant for blwf
(generator
(0
(cond
;; Isolated blwf
(" J([CR]H) "
(cond
((font-facility 0x25CC) < 0x25CC (1 :otf=knda=blwf+) >)
(" J([CR]H) " [ (1 :otf=knda=blwf+) ])))
;; Syllables with an overt halant
(" (RHJ?)?([^ ]+)(HN) "
| (1 = *) (2 reorder *) (3 = =) |)
;; Ordinary syllables
(" (RHJ?)?([^baA ]+)(b?b?n?a?n?A?) "
| (1 = *) (2 reorder *) (3 = *) |)
("." =))
*)
(reorder
(cond
("J?(H)([CR])" (2 =) (1 =))
("." =)))
)
;; Stage 3
;; Language forms
;; Although all consonants have a blow form and none has a half form,
;; we have to prevent the first consonant from forming the below form.
(generator
(0
(cond
;; Overt halant forms
(" (RHJ?)?([^ ]+)(HN) "
|
(1 (cond ("RHJ" = =)
("RH" :otf=knda=rphf+)))
(2 (cond ("(.H)J?(.*)" (1 :otf=knda=half+) (2 lang-forms *))
(".+" lang-forms *)))
(3 = =) |)
;; Other syllables
(" (RHJ?)?([^baA ]*)(b?b?n?a?n?A?) "
|
(1 (cond ("RHJ" = =)
("RH" :otf=knda=rphf+)))
(2 (cond ("(.H)J?(.*)" (1 :otf=knda=half+) (2 lang-forms *))
(".+" lang-forms *)))
(3 = *) |)
("." =))
*)
(lang-forms
(cond
("(.H)J" (1 :otf=knda=half+))
(".H" :otf=knda=blwf,half+)
("." =)))
)
;; Stage 4
;; Final reordering #1 (Move before-subscript matras)
(generator
(0
(cond
(" ([^B ]*[^BJ])J?(B*)(bb?n?)([^ ]*) "
| (1 = *) (3 = *) (2 = *) (4 = *) |)
("." =))
*))
;; Stage 5
;; Final reordering #2 (Move reph after the first halant)
(generator
(0
(cond
;; Syllables with a reph and an explicit halant
;; 1 2 3
(" (r)([^H ]+HJ?)([^ ]*) "
| (2 = *) (1 =) (3 = *) |)
;; A reph without explicit halant
;; 1 2 3
(" (r)([^A ]+)(A)? "
| (2 = *) (1 =) (3 =) |)
("." =))
*))
;; Stage 6
;; Nukta for matra and presentation forms
(generator
(0
(cond
(" ([^ ]+) "
| (1 :otf=knda=nukt,pres,abvs,blws,psts,haln+) |)
("." =))
*))
;; Stage 7
;; Remove ZWNJ/ZWJ
(generator
(0
(cond
("[NJ]")
("." =))
*))
;; Stage 8
;; GPOS processing
(generator
(0
(cond
(" ([^ ]+) "
(1 :otf=knda=+abvm,blwm,dist))
("." =))
*))
;; Copyright (C) 2004, 2007, 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: