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| Current File : //usr/share/m17n/TELU-OTF.flt |
;; TELU-OTF.flt -- Font Layout Table for Telugu OpenType fonts
;; Copyright (C) 2004, 2007, 2008, 2010 AIST (H15PRO112)
;; See the end for copying conditions.
(font layouter telu-otf nil
(version "1.6.0")
(font (nil nil unicode-bmp :otf=telu)))
;;; <li> TELU-OTF.flt
;;;
;;; For Telugu OpenType fonts to draw the Telugu script.
(category
(0x0C00 0x0C7F ?X) ; generic
(0x0C01 0x0C03 ?A) ; SIGN CANDRABINDU .. VISARGA
(0x0C05 0x0C14 ?V) ; LETTER A .. AU
(0x0C15 0x0C39 ?C) ; LETTER KA .. HA
(0x0C3E 0x0C42 ?u) ; VOWEL SIGN AA .. II
(0x0C43 0x0C44 ?p) ; VOWEL SIGN U .. VOCALIC RR
(0x0C46 0x0C47 ?u) ; VOWEL SIGN E .. EE
(0x0C4A 0x0C4C ?u) ; VOWEL SIGN O .. AU
(0x0C4D ?H) ; SIGN VIRAMA
(0x0C55 ?u) ; LENGTH MARK
(0x0C56 ?b) ; AI LENGTH MARK
(0x0C58 0x0C59 ?C) ; LETTER TSA .. DZA
(0x0C60 0x0C61 ?V) ; LETTER VOCALIC RR .. VOCALIC LL
(0x0C62 0x0C63 ?b) ; VOWEL SIGN VOCALIC L .. VOCALIC LL
(0x200C ?N) ; ZWNJ
(0x200D ?J) ; ZWJ
(0x25CC ?X) ; DOTTED CIRCLE
(blwf ?B)
)
;; Stage 0
;; Preprocessing
(generator
(0
(cond
;; Decompose two-part vowel signs.
((0x0C48)
0x0C46 0x0C56)
("." =))
*))
;; Stage 1
;; Syllable identification
(generator
(0
(cond
;; Consonant-based syllables
;;1 23 4
("(C((J?H|HJ?)C)*)(H[NJ]?|u?b?p?A?)"
< |
(cond
(".+HJ$" :otf=telu=nukt,akhn+)
("(.+)(H)N?$" (1 :otf=telu=nukt,akhn+) (2 =) 0x200C)
(".+" :otf=telu=nukt,akhn+))
| >)
;; Syllables with an independent vowel
;;1 2 3
("(V)(J?HC)?(u?b?p?A?)"
< | (1 =) (2 :otf=telu=blwf+) (3 = *) | >)
;; Two-part vowel signs
((0x0C46 0x0C56)
(cond
((font-facility 0x25CC) < 0x25CC = = >)
(".+" [ 0x0C48 ])))
;; Combining marks are displayed with a DOTTED CIRCLE.
("[HubpA]"
(cond
((font-facility 0x25CC) < 0x25CC = >)
("." [ = ])))
;; Isolated blwf is displayed with a DOTTED CIRCLE in the
;; next stage.
("(J)(H)(C)"
< | (1 =) (3 =) (2 = ) | >)
("." =))
*))
;; Stage 2
;; Reorder halant for blwf
(generator
(0
(cond
;; Isolated blwf
(" J(CH) "
(cond
((font-facility 0x25CC) < 0x25CC (1 :otf=telu=blwf+) >)
(" J(CH) " [ (1 :otf=telu=blwf+) ])))
;; Syllables with an overt halant
(" ([^ ]+)(HN) "
| (1 reorder *) (2 = =) |)
;; Ordinary syllables
(" ([^ubpA ]+)(u?b?p?A?) "
| (1 reorder *) (2 = *) |)
("." =))
*)
(reorder
(cond
("J?(H)(C)"
(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
(" ([^ ]+)(HN) "
|
(1 (cond ("(.H)J?(.*)" (1 :otf=telu=half+) (2 lang-forms *))
(".+" lang-forms *)))
(2 = =) |)
;; Other syllables
(" ([^ubpA ]*)(u?b?p?A?) "
|
(1 (cond ("(.H)J?(.*)" (1 :otf=telu=half+) (2 lang-forms *))
(".+" lang-forms *)))
(2 = *) |)
("." =))
*)
(lang-forms
(cond
("(.H)J" (1 :otf=telu=half+))
(".H" :otf=telu=blwf,half+)
("." =)))
)
;; Stage 4
;; Move subscript glyphs
(generator
(0
(cond
(" ([^B ]*[^BJ])J?(B*)(ub?|b)([^ ]*) "
| (1 = *) (3 = *) (2 = *) (4 = *) |)
("." =))
*))
;; Stage 5
;; Presentation forms
(generator
(0
(cond
(" ([^ ]+) "
| (1 :otf=telu=pres,abvs,blws,psts,haln+) |)
("." =))
*))
;; Stage 6
;; Remove ZWNJ/ZWJ
(generator
(0
(cond
("[NJ]")
("." =))
*))
;; Stage 7
;; GPOS processing
(generator
(0
(cond
(" ([^ ]+) "
(1 :otf=telu=+abvm,blwm,dist))
("." =))
*))
;; Copyright (C) 2004, 2007, 2008, 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: