Commit 2cb842ae authored by Kenichi Handa's avatar Kenichi Handa
Browse files

New file. Mule related code extracted from

ps-print.el.  Require ps-print, provide ps-mule.
(ps-multibyte-buffer): Add autoload cookie.
(ps-mule-prepare-ascii-font): New fun.
(ps-mule-set-ascii-font): New fun.
(ps-mule-skip-same-charset): Fun deleted.
(ps-mule-plot-string): Set ps-mule-current-charset.
(ps-mule-initialize): Add autload cookie.  Don't set
ps-mule-font-info-database here.
(ps-mule-begin-job): Renamed from ps-mule-begin.  Update
ps-mule-font-info-database and ps-control-or-escape-regexp.
(ps-mule-begin-page): New fun.

Doc fix. Require ps-print only when compiled.
(ps-mule-prologue-generated): New fun.
(ps-mule-plot-string): Add autoload cookie.
(ps-mule-begin-job): Call ps-mule-prologue-generated.

Programming uniformization and little code improvement.
(ps-mule-prepare-font): Programming uniformization.
(ps-mule-find-wrappoint, ps-mule-plot-rule-cmpchar)
(ps-mule-string-encoding, ps-mule-begin-job): Little code improvement.

Always require ps-print.  Move some function
definitions for Emacs 20.2 and the earlier to ps-print.el.
(ps-mule-find-wrappoint): Make it work also with Emacs 20.2.

(ps-mule-begin-job): Delete nil and unknown from a
list of character sets found by find-charset-region.
parent 9c423e6b
;;; ps-mule.el --- Provide multi-byte character facility to ps-print.
;; Copyright (C) 1998 Free Software Foundation, Inc.
;; Author: Vinicius Jose Latorre <vinicius@cpqd.com.br>
;; Author: Kenichi Handa <handa@etl.go.jp> (multi-byte characters)
;; Maintainer: Kenichi Handa <handa@etl.go.jp> (multi-byte characters)
;; Maintainer: Vinicius Jose Latorre <vinicius@cpqd.com.br>
;; Keywords: print, PostScript, multibyte, mule
;; Time-stamp: <98/12/15 14:04:50 handa>
;; 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:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; About ps-mule
;; -------------
;;
;; This package is used for ps-print to print multi-byte buffer.
;;
;; See also ps-print.el.
;;
;;
;; Printing Multi-byte Buffer
;; --------------------------
;;
;; The variable `ps-multibyte-buffer' specifies the ps-print multi-byte buffer
;; handling.
;;
;; Valid values for `ps-multibyte-buffer' are:
;;
;; nil This is the value to use when you are printing
;; buffer with only ASCII and Latin characters.
;;
;; `non-latin-printer' This is the value to use when you have a japanese
;; or korean PostScript printer and want to print
;; buffer with ASCII, Latin-1, Japanese (JISX0208 and
;; JISX0201-Kana) and Korean characters. At present,
;; it was not tested the Korean characters printing.
;; If you have a korean PostScript printer, please,
;; test it.
;;
;; `bdf-font' This is the value to use when you want to print
;; buffer with BDF fonts. BDF fonts include both latin
;; and non-latin fonts. BDF (Bitmap Distribution
;; Format) is a format used for distributing X's font
;; source file. BDF fonts are included in
;; `intlfonts-1.1' which is a collection of X11 fonts
;; for all characters supported by Emacs. In order to
;; use this value, be sure to have installed
;; `intlfonts-1.1' and set the variable
;; `bdf-directory-list' appropriately (see ps-bdf.el
;; for documentation of this variable).
;;
;; `bdf-font-except-latin' This is like `bdf-font' except that it is used
;; PostScript default fonts to print ASCII and Latin-1
;; characters. This is convenient when you want or
;; need to use both latin and non-latin characters on
;; the same buffer. See `ps-font-family',
;; `ps-header-font-family' and `ps-font-info-database'.
;;
;; Any other value is treated as nil.
;;
;; The default is nil.
;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Code:
(eval-and-compile (require 'ps-print))
;;;###autoload
(defcustom ps-multibyte-buffer nil
"*Specifies the multi-byte buffer handling.
Valid values are:
nil This is the value to use when you are printing
buffer with only ASCII and Latin characters.
`non-latin-printer' This is the value to use when you have a japanese
or korean PostScript printer and want to print
buffer with ASCII, Latin-1, Japanese (JISX0208 and
JISX0201-Kana) and Korean characters. At present,
it was not tested the Korean characters printing.
If you have a korean PostScript printer, please,
test it.
`bdf-font' This is the value to use when you want to print
buffer with BDF fonts. BDF fonts include both latin
and non-latin fonts. BDF (Bitmap Distribution
Format) is a format used for distributing X's font
source file. BDF fonts are included in
`intlfonts-1.1' which is a collection of X11 fonts
for all characters supported by Emacs. In order to
use this value, be sure to have installed
`intlfonts-1.1' and set the variable
`bdf-directory-list' appropriately (see ps-bdf.el for
documentation of this variable).
`bdf-font-except-latin' This is like `bdf-font' except that it is used
PostScript default fonts to print ASCII and Latin-1
characters. This is convenient when you want or
need to use both latin and non-latin characters on
the same buffer. See `ps-font-family',
`ps-header-font-family' and `ps-font-info-database'.
Any other value is treated as nil."
:type '(choice (const non-latin-printer) (const bdf-font)
(const bdf-font-except-latin) (other :tag "nil" nil))
:group 'ps-print-font)
;; For Emacs 20.2 and the earlier version.
(eval-and-compile
(if (not (string< mule-version "4.0"))
(progn
(defalias 'ps-mule-next-point '1+)
(defalias 'ps-mule-chars-in-string 'length)
(defalias 'ps-mule-string-char 'aref)
(defsubst ps-mule-next-index (str i) (1+ i)))
(defun ps-mule-next-point (arg)
(save-excursion (goto-char arg) (forward-char 1) (point)))
(defun ps-mule-chars-in-string (string)
(/ (length string)
(charset-bytes (char-charset (string-to-char string)))))
(defun ps-mule-string-char (string idx)
(string-to-char (substring string idx)))
(defun ps-mule-next-index (string i)
(+ i (charset-bytes (char-charset (string-to-char string))))))
)
(defvar ps-mule-font-info-database
nil
"Alist of charsets with the corresponding font information.
Each element has the form:
(CHARSET (FONT-TYPE FONT-SRC FONT-NAME ENCODING BYTES) ...)
Where
CHARSET is a charset (symbol) for this font family,
FONT-TYPE is a font type: normal, bold, italic, or bold-italic.
FONT-SRC is a font source: builtin, ps-bdf, vflib, or nil.
If FONT-SRC is builtin, FONT-NAME is a buitin PostScript font name.
If FONT-SRC is bdf, FONT-NAME is a BDF font file name. To use this font,
the external library `ps-bdf' is required.
If FONT-SRC is vflib, FONT-NAME is the name of a font that VFlib knows.
To use this font, the external library `vflib' is required.
If FONT-SRC is nil, a proper ASCII font in the variable
`ps-font-info-database' is used. This is useful for Latin-1 characters.
ENCODING is a coding system to encode a string of characters of CHARSET into a
proper string matching an encoding of the specified font. ENCODING may be a
function that does this encoding. In this case, the function is called with
one argument, the string to encode, and it should return an encoded string.
BYTES specifies how many bytes each character has in the encoded byte
sequence; it should be 1 or 2.
All multi-byte characters are printed by fonts specified in this database
regardless of a font family of ASCII characters. The exception is Latin-1
characters which are printed by the same font as ASCII characters, thus obey
font family.
See also the variable `ps-font-info-database'.")
(defconst ps-mule-font-info-database-latin
'((latin-iso8859-1
(normal nil nil iso-latin-1)))
"Sample setting of `ps-mule-font-info-database' to use latin fonts.")
(defconst ps-mule-font-info-database-ps
'((katakana-jisx0201
(normal builtin "Ryumin-Light.Katakana" ps-mule-encode-7bit 1)
(bold builtin "GothicBBB-Medium.Katakana" ps-mule-encode-7bit 1)
(bold-italic builtin "GothicBBB-Medium.Katakana" ps-mule-encode-7bit 1))
(latin-jisx0201
(normat builtin "Ryumin-Light.Hankaku" ps-mule-encode-7bit 1)
(bold builtin "GothicBBB-Medium.Hankaku" ps-mule-encode-7bit 1))
(japanese-jisx0208
(normal builtin "Ryumin-Light-H" ps-mule-encode-7bit 2)
(bold builtin "GothicBBB-Medium-H" ps-mule-encode-7bit 2))
(korean-ksc5601
(normal builtin "Batang-Medium-KSC-H" ps-mule-encode-7bit 2)
(bold builtin " Gulim-Medium-KSC-H" ps-mule-encode-7bit 2))
)
"Sample setting of the `ps-mule-font-info-database' to use builtin PS font.
Currently, data for Japanese and Korean PostScript printers are listed.")
(defconst ps-mule-font-info-database-bdf
'((ascii
(normal bdf "etl24-latin1.bdf" nil 1)
(bold bdf "etl16b-latin1.bdf" iso-latin-1 1)
(italic bdf "etl16i-latin1.bdf" iso-latin-1 1)
(bold-italic bdf "etl16bi-latin1.bdf" iso-latin-1 1))
(latin-iso8859-1
(normal bdf "etl24-latin1.bdf" iso-latin-1 1)
(bold bdf "etl16b-latin1.bdf" iso-latin-1 1)
(italic bdf "etl16i-latin1.bdf" iso-latin-1 1)
(bold-italic bdf "etl16bi-latin1.bdf" iso-latin-1 1))
(latin-iso8859-2
(normal bdf "etl24-latin2.bdf" iso-latin-2 1))
(latin-iso8859-3
(normal bdf "etl24-latin3.bdf" iso-latin-3 1))
(latin-iso8859-4
(normal bdf "etl24-latin4.bdf" iso-latin-4 1))
(thai-tis620
(normal bdf "thai-24.bdf" thai-tis620 1))
(greek-iso8859-7
(normal bdf "etl24-greek.bdf" greek-iso-8bit 1))
;; (arabic-iso8859-6 nil) ; not yet available
(hebrew-iso8859-8
(normal bdf "etl24-hebrew.bdf" hebrew-iso-8bit 1))
(katakana-jisx0201
(normal bdf "12x24rk.bdf" ps-mule-encode-8bit 1))
(latin-jisx0201
(normal bdf "12x24rk.bdf" ps-mule-encode-7bit 1))
(cyrillic-iso8859-5
(normal bdf "etl24-cyrillic.bdf" cyrillic-iso-8bit 1))
(latin-iso8859-9
(normal bdf "etl24-latin5.bdf" iso-latin-5 1))
(japanese-jisx0208-1978
(normal bdf "jiskan24.bdf" ps-mule-encode-7bit 2))
(chinese-gb2312
(normal bdf "gb24st.bdf" ps-mule-encode-7bit 2))
(japanese-jisx0208
(normal bdf "jiskan24.bdf" ps-mule-encode-7bit 2))
(korean-ksc5601
(normal bdf "hanglm24.bdf" ps-mule-encode-7bit 2))
(japanese-jisx0212
(normal bdf "jisksp40.bdf" ps-mule-encode-7bit 2))
(chinese-cns11643-1
(normal bdf "cns-1-40.bdf" ps-mule-encode-7bit 2))
(chinese-cns11643-2
(normal bdf "cns-2-40.bdf" ps-mule-encode-7bit 2))
(chinese-big5-1
(normal bdf "taipei24.bdf" chinese-big5 2))
(chinese-big5-2
(normal bdf "taipei24.bdf" chinese-big5 2))
(chinese-sisheng
(normal bdf "etl24-sisheng.bdf" ps-mule-encode-8bit 1))
(ipa
(normal bdf "etl24-ipa.bdf" ps-mule-encode-8bit 1))
(vietnamese-viscii-lower
(normal bdf "etl24-viscii.bdf" vietnamese-viscii 1))
(vietnamese-viscii-upper
(normal bdf "etl24-viscii.bdf" vietnamese-viscii 1))
(arabic-digit
(normal bdf "etl24-arabic0.bdf" ps-mule-encode-7bit 1))
(arabic-1-column
(normal bdf "etl24-arabic1.bdf" ps-mule-encode-7bit 1))
;; (ascii-right-to-left nil) ; not yet available
(lao
(normal bdf "mule-lao-24.bdf" lao 1))
(arabic-2-column
(normal bdf "etl24-arabic2.bdf" ps-mule-encode-7bit 1))
(indian-is13194
(normal bdf "mule-iscii-24.bdf" ps-mule-encode-7bit 1))
(indian-1-column
(normal bdf "mule-indian-1col-24.bdf" ps-mule-encode-7bit 2))
(tibetan-1-column
(normal bdf "mule-tibmdx-1col-24.bdf" ps-mule-encode-7bit 2))
(ethiopic
(normal bdf "ethiomx24f-uni.bdf" ps-mule-encode-ethiopic 2))
(chinese-cns11643-3
(normal bdf "cns-3-40.bdf" ps-mule-encode-7bit 2))
(chinese-cns11643-4
(normal bdf "cns-4-40.bdf" ps-mule-encode-7bit 2))
(chinese-cns11643-5
(normal bdf "cns-5-40.bdf" ps-mule-encode-7bit 2))
(chinese-cns11643-6
(normal bdf "cns-6-40.bdf" ps-mule-encode-7bit 2))
(chinese-cns11643-7
(normal bdf "cns-7-40.bdf" ps-mule-encode-7bit 2))
(indian-2-column
(normal bdf "mule-indian-24.bdf" ps-mule-encode-7bit 2))
(tibetan
(normal bdf "mule-tibmdx-24.bdf" ps-mule-encode-7bit 2)))
"Sample setting of the `ps-mule-font-info-database' to use BDF fonts.
BDF (Bitmap Distribution Format) is a format used for distributing X's font
source file.
Current default value list for BDF fonts is included in `intlfonts-1.1' which is
a collection of X11 fonts for all characters supported by Emacs.
Using this list as default value to `ps-mule-font-info-database', all characters
including ASCII and Latin-1 are printed by BDF fonts.
See also `ps-mule-font-info-database-ps-bdf'.")
(defconst ps-mule-font-info-database-ps-bdf
(cons (car ps-mule-font-info-database-latin)
(cdr (cdr ps-mule-font-info-database-bdf)))
"Sample setting of the `ps-mule-font-info-database' to use BDF fonts.
Current default value list for BDF fonts is included in `intlfonts-1.1' which is
a collection of X11 fonts for all characters supported by Emacs.
Using this list as default value to `ps-mule-font-info-database', all characters
except ASCII and Latin-1 characters are printed by BDF fonts. ASCII and Latin-1
characters are printed by PostScript font specified by `ps-font-family' and
`ps-header-font-family'.
See also `ps-mule-font-info-database-bdf'.")
;; Two typical encoding functions for PostScript fonts.
(defun ps-mule-encode-7bit (string)
(ps-mule-encode-bit string 0))
(defun ps-mule-encode-8bit (string)
(ps-mule-encode-bit string 128))
(defun ps-mule-encode-bit (string delta)
(let* ((dim (charset-dimension (char-charset (string-to-char string))))
(len (* (ps-mule-chars-in-string string) dim))
(str (make-string len 0))
(i 0)
(j 0))
(if (= dim 1)
(while (< j len)
(aset str j
(+ (nth 1 (split-char (ps-mule-string-char string i))) delta))
(setq i (ps-mule-next-index string i)
j (1+ j)))
(while (< j len)
(let ((split (split-char (ps-mule-string-char string i))))
(aset str j (+ (nth 1 split) delta))
(aset str (1+ j) (+ (nth 2 split) delta))
(setq i (ps-mule-next-index string i)
j (+ j 2)))))
str))
;; Special encoding function for Ethiopic.
(define-ccl-program ccl-encode-ethio-unicode
`(1
((read r2)
(loop
(if (r2 == ,leading-code-private-22)
((read r0)
(if (r0 == ,(charset-id 'ethiopic))
((read r1 r2)
(r1 &= 127) (r2 &= 127)
(call ccl-encode-ethio-font)
(write r1)
(write-read-repeat r2))
((write r2 r0)
(repeat))))
(write-read-repeat r2))))))
(defun ps-mule-encode-ethiopic (string)
(ccl-execute-on-string (symbol-value 'ccl-encode-ethio-unicode)
(make-vector 9 nil)
string))
;; A charset which we are now processing.
(defvar ps-mule-current-charset nil)
(defun ps-mule-get-font-spec (charset font-type)
"Return FONT-SPEC for printing characters CHARSET with FONT-TYPE.
FONT-SPEC is a list that has the form:
(FONT-SRC FONT-NAME ENCODING BYTES)
FONT-SPEC is extracted from `ps-mule-font-info-database'.
See the documentation of `ps-mule-font-info-database' for the meaning of each
element of the list."
(let ((slot (cdr (assq charset ps-mule-font-info-database))))
(and slot
(cdr (or (assq font-type slot)
(and (eq font-type 'bold-italic)
(or (assq 'bold slot) (assq 'italic slot)))
(assq 'normal slot))))))
;; Functions to access each element of FONT-SPEC.
(defsubst ps-mule-font-spec-src (font-spec) (car font-spec))
(defsubst ps-mule-font-spec-name (font-spec) (nth 1 font-spec))
(defsubst ps-mule-font-spec-encoding (font-spec) (nth 2 font-spec))
(defsubst ps-mule-font-spec-bytes (font-spec) (nth 3 font-spec))
(defsubst ps-mule-printable-p (charset)
"Non-nil if characters in CHARSET is printable."
(ps-mule-get-font-spec charset 'normal))
(defconst ps-mule-external-libraries
'((builtin nil nil
nil nil nil)
(bdf ps-bdf nil
bdf-generate-prologue bdf-generate-font bdf-generate-glyphs)
(pcf nil nil
pcf-generate-prologue pcf-generate-font pcf-generate-glyphs)
(vflib nil nil
vflib-generate-prologue vflib-generate-font vflib-generate-glyphs))
"Alist of information of external libraries to support PostScript printing.
Each element has the form:
(FONT-SRC FEATURE INITIALIZED-P PROLOGUE-FUNC FONT-FUNC GLYPHS-FUNC)
FONT-SRC is the font source: builtin, bdf, pcf, or vflib.
FEATURE is the feature that provide a facility to handle FONT-SRC. Except for
`builtin' FONT-SRC, this feature is automatically `require'd before handling
FONT-SRC. Currently, we only have the feature `ps-bdf'.
INITIALIZED-P indicates if this library is initialized or not.
PROLOGUE-FUNC is a function to generate PostScript code which define several
PostScript procedures that will be called by FONT-FUNC and GLYPHS-FUNC. It is
called with no argument, and should return a list of strings.
FONT-FUNC is a function to generate PostScript code which define a new font. It
is called with one argument FONT-SPEC, and should return a list of strings.
GLYPHS-FUNC is a function to generate PostScript code which define glyphs of
characters. It is called with three arguments FONT-SPEC, CODE-LIST, and BYTES,
and should return a list of strings.")
(defun ps-mule-init-external-library (font-spec)
"Initialize external library specified by FONT-SPEC for PostScript printing.
See the documentation of `ps-mule-get-font-spec' for FONT-SPEC's meaning."
(let* ((font-src (ps-mule-font-spec-src font-spec))
(slot (assq font-src ps-mule-external-libraries)))
(or (not font-src)
(nth 2 slot)
(let ((func (nth 3 slot)))
(if func
(progn
(or (featurep (nth 1 slot)) (require (nth 1 slot)))
(ps-output-prologue (funcall func))))
(setcar (nthcdr 2 slot) t)))))
;; Cached glyph information of fonts, alist of:
;; (FONT-NAME ((FONT-TYPE-NUMBER . SCALED-FONT-NAME) ...)
;; cache CODE0 CODE1 ...)
(defvar ps-mule-font-cache nil)
(defun ps-mule-generate-font (font-spec charset)
"Generate PostScript codes to define a new font in FONT-SPEC for CHARSET."
(let* ((font-cache (assoc (ps-mule-font-spec-name font-spec)
ps-mule-font-cache))
(font-src (ps-mule-font-spec-src font-spec))
(font-name (ps-mule-font-spec-name font-spec))
(func (nth 4 (assq font-src ps-mule-external-libraries)))
(scaled-font-name
(if (eq charset 'ascii)
(format "f%d" ps-current-font)
(format "f%02x-%d"
(charset-id charset) ps-current-font))))
(and func (not font-cache)
(ps-output-prologue (funcall func charset font-spec)))
(ps-output-prologue
(list (format "/%s %f /%s Def%sFontMule\n"
scaled-font-name ps-font-size font-name
(if (eq ps-mule-current-charset 'ascii) "Ascii" ""))))
(if font-cache
(setcar (cdr font-cache)
(cons (cons ps-current-font scaled-font-name)
(nth 1 font-cache)))
(setq font-cache (list font-name
(list (cons ps-current-font scaled-font-name))
'cache)
ps-mule-font-cache (cons font-cache ps-mule-font-cache)))
font-cache))
(defun ps-mule-generate-glyphs (font-spec code-list)
"Generate PostScript codes which generate glyphs for CODE-LIST of FONT-SPEC."
(let* ((font-src (ps-mule-font-spec-src font-spec))
(func (nth 5 (assq font-src ps-mule-external-libraries))))
(and func
(ps-output-prologue
(funcall func font-spec code-list
(ps-mule-font-spec-bytes font-spec))))))
(defun ps-mule-prepare-font (font-spec string charset &optional no-setfont)
"Generate PostScript codes to print STRING of CHARSET by font FONT-SPEC.
The generated code is inserted on prologue part except the code that sets the
current font (using PostScript procedure `FM').
If optional arg NO-SETFONT is non-nil, don't generate the code for setting the
current font."
(let ((font-cache (assoc (ps-mule-font-spec-name font-spec)
ps-mule-font-cache)))
(or (and font-cache (assq ps-current-font (nth 1 font-cache)))
(setq font-cache (ps-mule-generate-font font-spec charset)))
(or no-setfont
(let ((new-font (cdr (assq ps-current-font (nth 1 font-cache)))))
(or (equal new-font ps-last-font)
(progn
(ps-output (format "/%s FM\n" new-font))
(setq ps-last-font new-font)))))
(if (nth 5 (assq (ps-mule-font-spec-src font-spec)
ps-mule-external-libraries))
;; We have to generate PostScript codes which define glyphs.
(let* ((cached-codes (nthcdr 2 font-cache))
(bytes (ps-mule-font-spec-bytes font-spec))
(len (length string))
(i 0)
newcodes code)
(while (< i len)
(setq code (if (= bytes 1)
(aref string i)
(+ (* (aref string i) 256) (aref string (1+ i)))))
(or (memq code cached-codes)
(progn
(setq newcodes (cons code newcodes))
(setcdr cached-codes (cons code (cdr cached-codes)))))
(setq i (+ i bytes)))
(and newcodes
(ps-mule-generate-glyphs font-spec newcodes))))))
;;;###autoload
(defun ps-mule-prepare-ascii-font (string)
"Setup special ASCII font for STRING.
STRING should contain only ASCII characters."
(let ((font-spec
(ps-mule-get-font-spec
'ascii
(car (nth ps-current-font (ps-font-alist 'ps-font-for-text))))))
(and font-spec
(ps-mule-prepare-font font-spec string 'ascii))))
;;;###autoload
(defun ps-mule-set-ascii-font ()
(unless (eq ps-mule-current-charset 'ascii)
(ps-set-font ps-current-font)
(setq ps-mule-current-charset 'ascii)))
;; List of charsets of multi-byte characters in a text being printed.
;; If the text doesn't contain any multi-byte characters (i.e. only ASCII),
;; the value is nil.
(defvar ps-mule-charset-list nil)
;; This is a PostScript code inserted in the header of generated PostScript.
(defconst ps-mule-prologue
"%%%% Start of Mule Section
%% Working dictionary for general use.
/MuleDict 10 dict def
%% Define already scaled font for non-ASCII character sets.
/DefFontMule { % fontname size basefont |- --
findfont exch scalefont definefont pop
} bind def
%% Define already scaled font for ASCII character sets.
/DefAsciiFontMule { % fontname size basefont |-
MuleDict begin
findfont dup /Encoding get /ISOLatin1Encoding exch def
exch scalefont reencodeFontISO
end
} def
%% Set the specified non-ASCII font to use. It doesn't install
%% Ascent, etc.
/FM { % fontname |- --
findfont setfont
} bind def
%% Show vacant box for characters which don't have appropriate font.
/SB { % count column |- --
SpaceWidth mul /w exch def
1 exch 1 exch { %for
pop
gsave
0 setlinewidth
0 Descent rmoveto w 0 rlineto
0 LineHeight rlineto w neg 0 rlineto closepath stroke
grestore
w 0 rmoveto
} for
} bind def
%% Flag to tell if we are now handling a composite character. This is
%% defined here because both composite character handler and bitmap font
%% handler require it.
/Cmpchar false def
%%%% End of Mule Section
"
"PostScript code for printing multi-byte characters.")
(defvar ps-mule-prologue-generated nil)
(defun ps-mule-prologue-generated ()
(unless ps-mule-prologue-generated
(ps-output-prologue ps-mule-prologue)
(setq ps-mule-prologue-generated t)))
(defun ps-mule-find-wrappoint (from to char-width)
"Find the longest sequence which is printable in the current line.
The search starts at FROM and goes until TO. It is assumed that all characters
between FROM and TO belong to a charset in `ps-mule-current-charset'.
CHAR-WIDTH is the average width of ASCII characters in the current font.
Returns the value:
(ENDPOS . RUN-WIDTH)
Where ENDPOS is the end position of the sequence and RUN-WIDTH is the width of
the sequence."
(if (eq ps-mule-current-charset 'composition)
;; We must draw one char by one.
(let ((run-width (* (char-width (char-after from)) char-width)))