1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
;;; indian.el --- Indian languages support -*- coding: iso-2022-7bit; -*-
;; Copyright (C) 1999, 2001 Free Software Foundation, Inc.
;; Maintainer: KAWABATA, Taichi <kawabata@m17n.org>
;; Keywords: multilingual, i18n, Indian
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs 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 General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; This file defines in-is13194 coding system and relationship between
;; indian-glyph character-set and various CDAC fonts.
;;; Code:
(make-coding-system
'in-is13194 2 ?D
"8-bit encoding for ASCII (MSB=0) and IS13194-Devanagari (MSB=1)."
'(ascii indian-is13194 nil nil
nil ascii-eol)
`((safe-chars . ,(let ((table (make-char-table 'safe-chars nil)))
(set-char-table-range table 'indian-is13194 t)
(dotimes (i 127)
(aset table i t)
(aset table (decode-char 'ucs (+ #x900 i)) t))
table))
(post-read-conversion . in-is13194-post-read-conversion)
(pre-write-conversion . in-is13194-pre-write-conversion)))
(define-coding-system-alias 'devanagari 'in-is13194)
(defvar indian-font-foundry 'cdac
"Font foundry for Indian characters.
Currently supported foundries are `cdac' and `akruti'.")
(defvar indian-script-language-alist
"Alist of Indian scripts vs the corresponding language list and font foundry.
Each element has this form:
(SCRIPT LANGUAGE-LIST FONT-FOUNDRY)
SCRIPT is one of Indian script names.
LANGUAGE-LIST is a list of Indian langauge names SCRIPT is used for.
The list is in the priority order.
FONT-FOUNDRY is a font foundry representing a group of Indian
fonts. If the value is nil, the value of `indian-font-foundry'
is used."
'((devanagari (hindi sanskrit) nil)
(bengali (bengali assamese) nil)
(gurmukhi (punjabi) nil)
(gujarati (gujarati) nil)
(oriya (oriya) nil)
(tamil (tamil) nil)
(telugu (telugu) nil)
(kannada (kannada) nil)
(malayalam (malayalam) nil)))
(defconst indian-font-char-index-table
'( ; for which language(s)
;; CDAC fonts
(#x0000 . cdac:dv-ttsurekh) ; hindi, etc
(#x0100 . cdac:sd-ttsurekh) ; sanskrit
(#x0200 . cdac:bn-ttdurga) ; bengali
(#x0300 . cdac:tm-ttvalluvar) ; tamil
(#x0400 . cdac:tl-tthemalatha) ; telugu
(#x0500 . cdac:as-ttdurga) ; assamese
(#x0600 . cdac:or-ttsarala) ; oriya
(#x0700 . cdac:kn-ttuma) ; kannada
(#x0800 . cdac:ml-ttkarthika) ; malayalam
(#x0900 . cdac:gj-ttavantika) ; gujarati
(#x0A00 . cdac:pn-ttamar) ; punjabi
;; AKRUTI fonts
(#x0B00 . akruti:dev) ; hindi, etc
(#x0C00 . akruti:bng) ; bengali
(#x0D00 . akruti:pnj) ; punjabi
(#x0E00 . akruti:guj) ; gujarati
(#x0F00 . akruti:ori) ; oriya
(#x1000 . akruti:tml) ; tamil
(#x1100 . akruti:tlg) ; telugu
(#x1200 . akruti:knd) ; kannada
(#x1300 . akruti:mal) ; malayalam
)
"Aliat of indices of `indian-glyph' character vs Indian font identifiers.
Each element has this form: (INDEX . FONT-IDENTIFIER)
INDEX is an index number of the first character in the charset
`indian-glyph' assigned for glyphs in the font specified by
FONT-IDENTIFIER. Currently FONT-IDENTIFIERs are defined for CDAC
and AKRUTI font groups.")
(defun indian-font-char (index font-identifier)
"Return character of charset `indian-glyph' made from glyph index INDEX.
FONT-IDENTIFIER is an identifier of an Indian font listed in the
variable `indian-font-char-index-table'. It specifies which
font INDEX is for."
(if (or (< index 0) (> index 255))
(error "Invalid glyph index: %d" index))
(let ((start (car (rassq font-identifier indian-font-char-index-table))))
(if (not start)
(error "Unknown font identifier: %s" font-identifier))
(setq index (+ start index))
(make-char 'indian-glyph (+ (/ index 96) 32) (+ (% index 96) 32))))
;; Return a range of characters (cons of min and max character) of the
;; charset `indian-glyph' for displaying SCRIPT in LANGUAGE by a font
;; of FOUNDRY.
(defun indian-font-char-range (font-identifier)
(cons (indian-font-char 0 font-identifier)
(indian-font-char 255 font-identifier)))
(defvar indian-script-table
'[
devanagari
sanskrit
bengali
tamil
telugu
assamese
oriya
kannada
malayalam
gujarati
punjabi
]
"Vector of Indian script names.")
(let ((len (length indian-script-table))
(i 0))
(while (< i len)
(put (aref indian-script-table i) 'indian-glyph-code-offset (* 256 i))
(setq i (1+ i))))
(defvar indian-default-script 'devanagari
"Default script for Indian languages.
Each Indian language environment sets this value
to one of `indian-script-table' (which see).
The default value is `devanagari'.")
(define-ccl-program ccl-encode-indian-glyph-font
`(0
;; Shorten (r1 = (((((r1 - 32) * 96) + r2) - 32) % 256))
(r1 = ((((r1 * 96) + r2) - ,(+ (* 32 96) 32)) % 256))))
(setq font-ccl-encoder-alist
(cons (cons "-CDAC" 'ccl-encode-indian-glyph-font)
font-ccl-encoder-alist))
(setq font-ccl-encoder-alist
(cons (cons "-AKRUTI" 'ccl-encode-indian-glyph-font)
font-ccl-encoder-alist))
(provide 'indian)
;;; arch-tag: 83aa8fc7-7ee2-4364-a6e5-498f5e3b8c2f
;;; indian.el ends here
|
