1 ;; KNDA-OTF.flt -- Font Layout Table for Kannada OpenType fonts
2 ;; Copyright (C) 2004, 2007
3 ;; National Institute of Advanced Industrial Science and Technology (AIST)
4 ;; Registration Number H15PRO112
6 ;; This file is part of the m17n database; a sub-part of the m17n
9 ;; The m17n library is free software; you can redistribute it and/or
10 ;; modify it under the terms of the GNU Lesser General Public License
11 ;; as published by the Free Software Foundation; either version 2.1 of
12 ;; the License, or (at your option) any later version.
14 ;; The m17n library is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 ;; Lesser General Public License for more details.
19 ;; You should have received a copy of the GNU Lesser General Public
20 ;; License along with the m17n library; if not, write to the Free
21 ;; Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 ;; Boston, MA 02110-1301, USA.
26 ;;; For Kannada OpenType fonts to draw Kannada.
27 ;;; Designed for Kedage-n.ttf <http://brahmi.sourceforge.net/downloads.html>
29 (font layouter knda-otf nil
30 (font (nil nil unicode-bmp :otf=knda=rphf)))
33 ;; C: general consonant
39 ;; t: MATRA (two-part)
40 ;; T: MATRA (three-part)
41 ;; a: vowel modifier (post)
42 ;; V: independent vowel
43 ;; N: ZWNJ (ZERO WIDTH NON-JOINER)
44 ;; J: ZWJ (ZERO WIDTH JOINER)
50 (0x0965 ?E) ; DOUBLE DANDA
51 (0x0C80 0x0CFF ?E) ; ELSE
52 (0x0C82 0x0C83 ?a) ; SIGN ANUSVARA, VISARGA
53 (0x0C85 0x0C94 ?V) ; LETTER A .. LETTER AU
54 (0x0C95 0x0CB9 ?C) ; LETTER KA .. LETTER HA
55 (0x0CB0 ?R) ; LETTER RA
56 (0x0CBC ?n) ; SIGN NUKTA
57 (0x0CBE ?p) ; VOWEL SIGN AA (post)
58 (0x0CBF ?u) ; VOWEL SIGN I (above)
59 (0x0CC0 ?t) ; VOWEL SIGN II (two-part)
60 (0x0CC1 0x0CC4 ?p) ; VOWEL SIGN U, UU, R, RR (post)
61 (0x0CC6 ?u) ; VOWEL SIGN E (above)
62 (0x0CC7 0x0CCA ?t) ; VOWEL SIGN EE, AI, O (two-part)
63 (0x0CCB ?T) ; VOWEL SIGN OO (three-part)
64 (0x0CCC ?u) ; VOWEL SIGN AU (above)
65 (0x0CCD ?H) ; SIGN VIRAMA (HALANT)
66 (0x0CD5 0x0CD6 ?l) ; LENGTH MARK (length post)
67 (0x0CDE ?C) ; LETTER FA (LLLA)
68 (0x0CE0 0x0CE1 ?V) ; LETTER VOCALIC RR, LL
69 (0x0CE2 0x0CE3 ?b) ; VOWEL SIGN VOCALIC L, LL
70 (0x0CFD ?Z) ; internal use
71 (0x0CFE ?Y) ; internal use
72 (0x0CFF ?X) ; internal use
75 ;; Step 1 : Syllable identification and Halant movement.
79 ;; A syllable containing a three-part vowel sign.
80 ("([CR]J?n?(H[CR]n?)*)(T)(a)?"
81 < | (1 move-base-Halant) (3 0x0CC6 0x0CC2 0x0CD5) (4 =) | >)
83 ;; A syllable containing a two-part vowel sign.
84 ("([CR]J?n?(H[CR]n?)*)(t)(a)?"
85 < | (1 move-base-Halant) (3 two-part) (4 =) | >)
87 ;; A syllable ending with vowel signs and/or a vowel modifier.
88 ("([CR]J?n?(H[CR]n?)*)([ubpl]+a?|a)"
89 < | (1 move-base-Halant) (3 = *) | >)
91 ;; Forced Halant form.
92 ("(([CR]n?H)*)([CR]n?H)N"
93 < | (1 move-base-Halant) | >
94 < | (3 move-base-Halant) | >)
97 ("(([CR]n?H)*)([CR]n?H)J"
98 < | (1 move-base-Halant) >
99 < | (3 otf:knda=blwf) | >)
101 ;; A syllable without a vowel sign nor a vowel modifier.
102 ("[CR]J?n?(H[CR]n?)*H?"
103 < | move-base-Halant | >)
105 ;; A syllable starting with an independent vowel.
112 ;; Move Halant on the base consonant to the tail if the syllable ends
114 ;; A leading 0x0CFF means Halant movement.
115 ;; A leading 0x0CFE means a syllable ending with a Halant.
116 ;; A leading 0x0CFD means Halant & Reph movements.
122 0x0CFD (2 = *) (1 = =))
123 ("(RH)([CR]n?)(H)(.*)"
124 0x0CFD (2 = *) (4 = *) (3 =) (1 = =))
126 0x0CFF (1 =) (3 = *) (2 =))
128 0x0CFF (1 = *) (3 = *) (2 =))
132 ;; Divide a two-part Matra into elements.
135 ((0x0CC0) 0x0CBF 0x0CD5)
136 ((0x0CC7) 0x0CC6 0x0CD5)
137 ((0x0CC8) 0x0CC6 0x0CD6)
138 ((0x0CCA) 0x0CC6 0x0CC2)))
141 ;; Step 2 : Move Matra if applicable.
142 ;; The base consonant in a Halant-ending syllable is changed into Halant form.
147 (" Z([CR]n?)([CRnH]*)(RH)(u)?(b)?(p)?(l*)(a)? "
148 | (1 = *) (4 =) (5 =) (6 =) (2 = *) (7 = *) (3 otf:knda=rphf) (8 =) |)
150 (" X([CR]n?)([CRnH]*)(u)?(b)?(p)?(l*)(a)? "
151 | (1 = *) (3 =) (4 =) (5 =) (2 = *) (6 = *) (7 =) |)
152 (" Y([CR]n?H)([^ ]*) "
153 ;; Kedage-n.ttf lacks the haln feature, so "otf:knda=haln" does not work.
154 | (1 otf:knda=~rphf,~blwf,*) (2 = *) |)
158 ;; Step 3 : Drive OTF tables.
163 (1 otf:knda=~rphf,*))