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- ;; KHMR-OTF.flt -- Font Layout Table for Khmer OpenType fonts
- ;; Copyright (C) 2005, 2007 AIST (H15PRO112)
- ;; See the end for copying conditions.
-
- (font layouter khmr-otf nil
- (font (nil nil unicode-bmp :otf=khmr=pres)))
-
- ;;; <li> KHMR-OTF.flt
- ;;;
- ;;; For Khmer OpenType fonts to draw Khmer.
- ;;; A Font is available from
- ;;; <http://www.khmeros.info/drupal/?q=en/download/fonts>.
-
- (category
- (0x1780 0x17FF ?E) ; E: else
- (0x19E0 0x19FF ?E)
- (0x1780 0x17B3 ?C) ; C: consonant & independent vowel
- (0x179A ?R) ; R: RO
- (0x17B6 ?p) ; p: vowel sign (post)
- (0x17B7 0x17BA ?a) ; a: vowel sign (above)
- (0x17BB 0x17BD ?b) ; b: vowel sign (below)
- (0x17BE ?A) ; A: vowel sign (two-part, above)
- (0x17BF 0x17C0 ?P) ; P: vowel sign (two-part, post)
- (0x17C1 0x17C3 ?m) ; m: vowel sign (pre)
- (0x17C4 0x17C5 ?P)
- (0x17C6 ?s) ; s: sign (above)
- (0x17C7 0x17C8 ?S) ; S: sign (post)
- (0x17C9 0x17CA ?c) ; c: consonant shifter
- (0x17CB 0x17D1 ?s)
- (0x17CC ?r) ; r: ROBAT
- (0x17D2 ?H) ; H: COENG
- (0x17D3 ?s)
- (0x17DD ?s)
- (0x200C ?N) ; N: ZERO WIDTH NON-JOINER
- (0x200D ?J) ; J: ZERO WIDTH JOINER
- )
-
- ;; Generic syllable pattern is as follows.
- ;; [CR](r|N?c)?(HCr?)*(HR)?(HCr?)*[NJ]?(m|b|a|A|p|P)?s*S?(H[CR])?
-
- ;; Step 0.
- ;; Move m to the beginning.
- ;; Split A and P.
- ;; Exchange the order of pP and s.
- ;; Move HR before the base.
-
- (generator
- (0
- (cond
-
- ;; pre vowel sign
- ;;1 2 3 4 5 67 8 9 10
- ("([CR](r|N?c)?(HCr?)*)(HR(r)?)?((HCr?)*[NJ]?)(m)(s*S?(H[CR])?)"
- < | (8 =) (4 = =) (1 = *) (5 =) (6 = *) (9 = *) | > )
-
- ;; two-part above vowel sign
- ;;1 2 3 4 5 67 8
- ("([CR](r|N?c)?(HCr?)*)(HR(r)?)?((HCr?)*[NJ]?As*S?(H[CR])?)"
- < | 0x17C1 (4 = =) (1 = *) (5 =) (6 = *) | > )
-
- ;; post vowel sign
- ;;1 2 3 4 5 67 8 9 10 11
- ("([CR](r|N?c)?(HCr?)*)(HR(r)?)?((HCr?)*[NJ]?)(p)(s*)(S?(H[CR])?)"
- < | (4 = =) (1 = *) (5 =) (6 = *) (9 = *) (8 =) (10 = *) | > )
-
- ;; two-part post vowel sign
- ;;1 2 3 4 5 67 8 9 10 11
- ("([CR](r|N?c)?(HCr?)*)(HR(r)?)?((HCr?)*[NJ]?)(P)(s*)(S?(H[CR])?)"
- < | 0x17C1 (4 = =) (1 = *) (5 =) (6 = *) (9 = *) (8 =) (10 = *) | > )
-
- ;; other vowel signs or no vowel sign
- ;;1 2 3 4 5 67 8
- ("([CR](r|N?c)?(HCr?)*)(HR(r)?)?((HCr?)*[NJ]?[b|a]?s*S?(H[CR])?)"
- < | (4 = =) (1 = *) (5 =) (6 = *) | > )
-
- ("." =))
- *))
-
- ;; Now a syllable looks like below.
- ;; m?(HR)?[CR](r|N?c)?(HCr?)*[NJ]?(b|a|A)?s*(p|P)?S?(H[CR])?
-
- ;; Step 1.
- ;; Set the form of consonant shifter.
-
- (generator
- (0
- (cond
- ;; shifter + above vowel sign without ZWNJ
- ;; Shifter take blwf. HR takes pref. HC's take blwf or pstf.
- ;; 1 2 3 4 5 6 7 8
- (" (m)?(HR)?([CR]c(HCr?)*(N|J)?(a|A))(s*S?)(H[CR])? "
- |
- (1 =)
- (2 otf:khmr=pref+)
- (3 otf:khmr=blwf,abvf,pstf+)
- (7 = *)
- (8 otf:khmr=blwf,pstf+)
- | )
-
- ;; shifter + ZWNJ + above vowel sign, or, shifter without above vowel sign
- ;; Shifter stays above. HR takes pref. HC's take blwf or pstf.
- ;; 1 2 3 45 6 7 8 9 10 11
- (" (m)?(HR)?([CR]N?c)((HCr?)*)([NJ]?[ba]?)(A)?(s*p?)(P)?(S)?(H[CR])? "
- |
- (1 =)
- (2 otf:khmr=pref+)
- (3 = *)
- (4 otf:khmr=blwf,pstf+)
- (6 = *)
- (7 otf:khmr=abvf+)
- (8 = *)
- (9 otf:khmr=pstf+)
- (10 =)
- (11 otf:khmr=blwf,pstf+)
- | )
-
- ;; no shifter
- ;; 1 2 3 45 6 7 8 9 10 11
- (" (m)?(HR)?([CR]r?)((HCr?)*)([NJ]?[ba]?)(A)?(s*p?)(P)?(S)?(H[CR])? "
- |
- (1 =)
- (2 otf:khmr=pref+)
- (3 = *)
- (4 otf:khmr=blwf,pstf+)
- (6 = *)
- (7 otf:khmr=abvf+)
- (8 = *)
- (9 otf:khmr=pstf+)
- (10 =)
- (11 otf:khmr=blwf,pstf+)
- | )
-
- ("." =))
- *))
-
- ;; Now a syllable looks like below. ~ characters are OTF feature applied.
- ;; m?(HR)?[CR](r|c)?(HCr?)*[NJ]?(b|a|A)?s*(p|P)?S?(H[CR])?
- ;; ~~ ~~ ~ ~~~~ ~ ~ ~~~~~
-
- ;; Step 2.
- ;; Concatenate adjacent Khmer syllables.
- ;; Remove J. Retain N to prevent ligature.
-
- (generator
- (0
- (cond
- (" ")
- ("J")
- ("." =))
- *))
-
- ;; Step 3.
- ;; Apply other OTF features.
-
- (generator
- (0
- (cond
- (" ([^ ]*) "
- (1 otf:khmr=pres,blws,abvs,psts,clig))
- ("."
- [ = ]))
- *))
-
- ;; Step 4.
- ;; Remove N to clean up.
- (generator
- (0
- (cond
- ("N")
- ("." =))
- *))
-
- ;; Copyright (C) 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.
-
- ;; 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:
-