mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-27 07:37:33 +00:00
443 lines
16 KiB
EmacsLisp
443 lines
16 KiB
EmacsLisp
;;; ps-bdf.el --- BDF font file handler for ps-print.
|
|
|
|
;; Copyright (C) 1998, 1999 Electrotechnical Laboratory, JAPAN.
|
|
;; Licensed to the Free Software Foundation.
|
|
|
|
;; Keywords: wp, BDF, font, PostScript
|
|
;; Maintainer: Kenichi Handa <handa@etl.go.jp>
|
|
;; Time-stamp: <99/02/27 11:14:07 kenichi>
|
|
|
|
;; 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:
|
|
|
|
;; Functions for getting bitmap information from X's BDF font file are
|
|
;; provided.
|
|
|
|
;;; Code:
|
|
|
|
(eval-when-compile (require 'ps-mule))
|
|
|
|
;;;###autoload
|
|
(defvar bdf-directory-list
|
|
(if (eq system-type 'ms-dos)
|
|
(list (expand-file-name "fonts/bdf" installation-directory))
|
|
'("/usr/local/share/emacs/fonts/bdf"))
|
|
"*List of directories to search for `BDF' font files.
|
|
The default value is '(\"/usr/local/share/emacs/fonts/bdf\").")
|
|
|
|
;; MS-DOS users like to move the binary around after it's built, but
|
|
;; the value above is computed at loadup time.
|
|
(and (eq system-type 'ms-dos)
|
|
(setq bdf-directory-list
|
|
(list (expand-file-name "fonts/bdf" installation-directory))))
|
|
|
|
(defun bdf-expand-file-name (bdfname)
|
|
"Return an abosolute path name of a `BDF' font file BDFNAME.
|
|
It searches directories listed in the variable `bdf-directory-list'
|
|
for BDFNAME."
|
|
(if (file-name-absolute-p bdfname)
|
|
(and (file-readable-p bdfname)
|
|
bdfname)
|
|
(let ((dir-list bdf-directory-list)
|
|
dir)
|
|
(while (and dir-list
|
|
(progn
|
|
(setq dir (expand-file-name bdfname (car dir-list)))
|
|
(not (file-readable-p dir))))
|
|
(setq dir nil
|
|
dir-list (cdr dir-list)))
|
|
dir)))
|
|
|
|
(defsubst bdf-file-mod-time (filename)
|
|
"Return modification time of FILENAME.
|
|
The value is a list of two integers, the first integer has high-order
|
|
16 bits, the second has low 16 bits."
|
|
(nth 5 (file-attributes filename)))
|
|
|
|
(defun bdf-file-newer-than-time (filename mod-time)
|
|
"Return non-nil if and only if FILENAME is newer than MOD-TIME.
|
|
MOD-TIME is a modification time as a list of two integers, the first
|
|
integer has high-order 16 bits, the second has low 16 bits."
|
|
(let ((file-name (bdf-expand-file-name filename)))
|
|
(and file-name
|
|
(let* ((new-mod-time (bdf-file-mod-time file-name))
|
|
(new-time (car new-mod-time))
|
|
(time (car mod-time)))
|
|
(or (> new-time time)
|
|
(and (= new-time time)
|
|
(> (nth 1 new-mod-time) (nth 1 mod-time))))))))
|
|
|
|
(defun bdf-find-file (bdfname)
|
|
"Return a buffer visiting a bdf file BDFNAME.
|
|
If BDFNAME is not an absolute path, directories listed in
|
|
`bdf-directory-list' is searched.
|
|
If BDFNAME doesn't exist, return nil."
|
|
(let ((file-name (bdf-expand-file-name bdfname)))
|
|
(and file-name
|
|
(let ((buf (generate-new-buffer " *bdf-work*"))
|
|
(coding-system-for-read 'no-conversion))
|
|
(save-excursion
|
|
(set-buffer buf)
|
|
(insert-file-contents file-name)
|
|
buf)))))
|
|
|
|
(defvar bdf-cache-file (convert-standard-filename "~/.bdfcache.el")
|
|
"Name of cache file which contains information of `BDF' font files.")
|
|
|
|
(defvar bdf-cache nil
|
|
"Cached information of `BDF' font files. It is a list of FONT-INFO.
|
|
FONT-INFO is a list of the following format:
|
|
(BDFFILE ABSOLUTE-PATH MOD-TIME SIZE FONT-BOUNDING-BOX
|
|
RELATIVE-COMPOSE BASELINE-OFFSET CODE-RANGE MAXLEN OFFSET-VECTOR)
|
|
See the documentation of the function `bdf-read-font-info' for more detail.")
|
|
|
|
(defun bdf-read-cache ()
|
|
"Return a cached information about `BDF' font files from a cache file.
|
|
The variable `bdf-cache-file' holds the cache file name.
|
|
If the cache file is not readable, this return nil."
|
|
(setq bdf-cache nil)
|
|
(condition-case nil
|
|
(and (file-readable-p bdf-cache-file)
|
|
(progn
|
|
(load-file bdf-cache-file)
|
|
(if (listp bdf-cache)
|
|
bdf-cache
|
|
(setq bdf-cache nil))))
|
|
(error nil)))
|
|
|
|
(defun bdf-write-cache ()
|
|
"Write out cached information of `BDF' font file to a file.
|
|
The variable `bdf-cache-file' holds the cache file name.
|
|
The file is written if and only if the file alreay exists and writable."
|
|
(and bdf-cache
|
|
(file-exists-p bdf-cache-file)
|
|
(file-writable-p bdf-cache-file)
|
|
(write-region (format "(setq bdf-cache '%S)\n" bdf-cache)
|
|
nil bdf-cache-file)))
|
|
|
|
(defun bdf-set-cache (font-info)
|
|
"Cache FONT-INFO as information about one `BDF' font file.
|
|
FONT-INFO is a list of the following format:
|
|
(BDFFILE ABSOLUTE-PATH MOD-TIME SIZE FONT-BOUNDING-BOX
|
|
RELATIVE-COMPOSE BASELINE-OFFSET CODE-RANGE MAXLEN OFFSET-VECTOR)
|
|
See the documentation of the function `bdf-read-font-info' for more detail."
|
|
(let ((slot (assoc (car font-info) bdf-cache)))
|
|
(if slot
|
|
(setcdr slot (cdr font-info))
|
|
(setq bdf-cache (cons font-info bdf-cache)))))
|
|
|
|
(defun bdf-initialize ()
|
|
"Initialize `bdf' library."
|
|
(and (bdf-read-cache)
|
|
(add-hook 'kill-emacs-hook 'bdf-write-cache)))
|
|
|
|
(defun bdf-compact-code (code code-range)
|
|
(if (or (< code (aref code-range 4))
|
|
(> code (aref code-range 5)))
|
|
(setq code (aref code-range 6)))
|
|
(+ (* (- (lsh code -8) (aref code-range 0))
|
|
(1+ (- (aref code-range 3) (aref code-range 2))))
|
|
(- (logand code 255) (aref code-range 2))))
|
|
|
|
(defun bdf-expand-code (code code-range)
|
|
(let ((code0-range (1+ (- (aref code-range 3) (aref code-range 2)))))
|
|
(+ (* (+ (/ code code0-range) (aref code-range 0)) 256)
|
|
(+ (% code code0-range) (aref code-range 2)))))
|
|
|
|
(defun bdf-search-and-read (match limit)
|
|
(goto-char (point-min))
|
|
(and (search-forward match limit t)
|
|
(progn
|
|
(goto-char (match-end 0))
|
|
(read (current-buffer)))))
|
|
|
|
(defun bdf-read-font-info (bdfname)
|
|
"Read `BDF' font file BDFNAME and return information (FONT-INFO) of the file.
|
|
FONT-INFO is a list of the following format:
|
|
(BDFFILE ABSOLUTE-PATH MOD-TIME FONT-BOUNDING-BOX
|
|
RELATIVE-COMPOSE BASELINE-OFFSET CODE-RANGE MAXLEN OFFSET-VECTOR)
|
|
|
|
BDFFILE is a name of a font file (excluding directory part).
|
|
|
|
ABSOLUTE-PATH is an absolute path of the font file.
|
|
|
|
MOD-TIME is last modification time as a list of two integers, the
|
|
first integer has high-order 16 bits, the second has low 16 bits.
|
|
|
|
SIZE is a size of the font. This value is got from SIZE record of the
|
|
font.
|
|
|
|
FONT-BOUNDING-BOX is the font bounding box as a list of four integers,
|
|
BBX-WIDTH, BBX-HEIGHT, BBX-XOFF, and BBX-YOFF.
|
|
|
|
RELATIVE-COMPOSE is an integer value of the font's property
|
|
`_MULE_RELATIVE_COMPOSE'. If the font doesn't have this property, the
|
|
value is 0.
|
|
|
|
BASELINE-OFFSET is an integer value of the font's property
|
|
`_MULE_BASELINE_OFFSET'. If the font doesn't have this property, the
|
|
value is 0.
|
|
|
|
CODE-RANGE is a vector of minimum 1st byte, maximum 1st byte, minimum
|
|
2nd byte, maximum 2nd byte, minimum code, maximum code, and default
|
|
code. For 1-byte fonts, the first two elements are 0.
|
|
|
|
MAXLEN is a maximum bytes of one glyph informaion in the font file.
|
|
|
|
OFFSET-VECTOR is a vector of a file position which starts bitmap data
|
|
of the glyph in the font file.
|
|
|
|
Nth element of OFFSET-VECTOR is a file position for the glyph of code
|
|
CODE, where N and CODE are in the following relation:
|
|
(bdf-compact-code CODE) => N, (bdf-expand-code N) => CODE"
|
|
(let* ((absolute-path (bdf-expand-file-name bdfname))
|
|
(buf (and absolute-path (bdf-find-file absolute-path)))
|
|
(maxlen 0)
|
|
(relative-compose 'false)
|
|
(baseline-offset 0)
|
|
size
|
|
font-bounding-box
|
|
default-char
|
|
code-range
|
|
offset-vector)
|
|
(if buf
|
|
(message "Reading %s..." bdfname)
|
|
(error "BDF file %s doesn't exist" bdfname))
|
|
(unwind-protect
|
|
(save-excursion
|
|
(set-buffer buf)
|
|
(goto-char (point-min))
|
|
(search-forward "\nFONTBOUNDINGBOX")
|
|
(setq font-bounding-box
|
|
(vector (read (current-buffer)) (read (current-buffer))
|
|
(read (current-buffer)) (read (current-buffer))))
|
|
;; The following kludgy code is to avoid bugs of fonts
|
|
;; jiskan16.bdf and jiskan24.bdf distributed with X.
|
|
;; They contain wrong FONTBOUNDINGBOX.
|
|
(and (> (aref font-bounding-box 3) 0)
|
|
(string-match "jiskan\\(16\\|24\\)" bdfname)
|
|
(aset font-bounding-box 3
|
|
(- (aref font-bounding-box 3))))
|
|
|
|
(goto-char (point-min))
|
|
(search-forward "\nSIZE ")
|
|
(setq size (read (current-buffer)))
|
|
;; The following kludgy code is t avoid bugs of several
|
|
;; fonts which have wrong SIZE record.
|
|
(and (<= size (/ (aref font-bounding-box 1) 2))
|
|
(setq size (aref font-bounding-box 1)))
|
|
|
|
(setq default-char (bdf-search-and-read "\nDEFAULT_CHAR" nil))
|
|
|
|
(search-forward "\nSTARTCHAR")
|
|
(forward-line -1)
|
|
(let ((limit (point)))
|
|
(setq relative-compose
|
|
(or (bdf-search-and-read "\n_MULE_RELATIVE_COMPOSE" limit)
|
|
'false)
|
|
baseline-offset
|
|
(or (bdf-search-and-read "\n_MULE_BASELINE_OFFSET" limit)
|
|
0)))
|
|
|
|
(let ((min-code0 256) (min-code1 256) (min-code 65536)
|
|
(max-code0 0) (max-code1 0) (max-code 0)
|
|
glyph glyph-list code0 code1 code bbx offset)
|
|
|
|
(while (search-forward "\nSTARTCHAR" nil t)
|
|
(setq offset (line-beginning-position))
|
|
(search-forward "\nENCODING")
|
|
(setq code (read (current-buffer))
|
|
code0 (lsh code -8)
|
|
code1 (logand code 255)
|
|
min-code (min min-code code)
|
|
max-code (max max-code code)
|
|
min-code0 (min min-code0 code0)
|
|
max-code0 (max max-code0 code0)
|
|
min-code1 (min min-code1 code1)
|
|
max-code1 (max max-code1 code1))
|
|
(search-forward "ENDCHAR")
|
|
(setq maxlen (max maxlen (- (point) offset))
|
|
glyph-list (cons (cons code offset) glyph-list)))
|
|
|
|
(setq code-range
|
|
(vector min-code0 max-code0 min-code1 max-code1
|
|
min-code max-code (or default-char min-code))
|
|
offset-vector
|
|
(make-vector (1+ (bdf-compact-code max-code code-range))
|
|
nil))
|
|
|
|
(while glyph-list
|
|
(setq glyph (car glyph-list)
|
|
glyph-list (cdr glyph-list))
|
|
(aset offset-vector
|
|
(bdf-compact-code (car glyph) code-range)
|
|
(cdr glyph)))))
|
|
|
|
(kill-buffer buf))
|
|
(message "Reading %s...done" bdfname)
|
|
(list bdfname absolute-path (bdf-file-mod-time absolute-path)
|
|
size font-bounding-box relative-compose baseline-offset
|
|
code-range maxlen offset-vector)))
|
|
|
|
(defsubst bdf-info-absolute-path (font-info) (nth 1 font-info))
|
|
(defsubst bdf-info-mod-time (font-info) (nth 2 font-info))
|
|
(defsubst bdf-info-size (font-info) (nth 3 font-info))
|
|
(defsubst bdf-info-font-bounding-box (font-info) (nth 4 font-info))
|
|
(defsubst bdf-info-relative-compose (font-info) (nth 5 font-info))
|
|
(defsubst bdf-info-baseline-offset (font-info) (nth 6 font-info))
|
|
(defsubst bdf-info-code-range (font-info) (nth 7 font-info))
|
|
(defsubst bdf-info-maxlen (font-info) (nth 8 font-info))
|
|
(defsubst bdf-info-offset-vector (font-info) (nth 9 font-info))
|
|
|
|
(defun bdf-get-font-info (bdfname)
|
|
"Return information about `BDF' font file BDFNAME.
|
|
The value FONT-INFO is a list of the following format:
|
|
(BDFFILE ABSOLUTE-PATH MOD-TIME SIZE FONT-BOUNDING-BOX
|
|
RELATIVE-COMPOSE BASELINE-OFFSET CODE-RANGE MAXLEN OFFSET-VECTOR)
|
|
See the documentation of the function `bdf-read-font-info' for more detail."
|
|
(or bdf-cache
|
|
(bdf-read-cache))
|
|
(let ((font-info (assoc bdfname bdf-cache)))
|
|
(if (or (not font-info)
|
|
(not (file-readable-p (bdf-info-absolute-path font-info)))
|
|
(bdf-file-newer-than-time bdfname (bdf-info-mod-time font-info)))
|
|
(progn
|
|
(setq font-info (bdf-read-font-info bdfname))
|
|
(bdf-set-cache font-info)))
|
|
font-info))
|
|
|
|
(defun bdf-find-font-info (bdfnames)
|
|
"Return information about `BDF' font file with alternative names BDFNAMES.
|
|
|
|
If BDFNAMES is a list of file names, this function finds the first file
|
|
in the list which exists and is readable, then calls `bdf-get-font-info'
|
|
on that file name."
|
|
(let ((fnlist bdfnames)
|
|
(fname bdfnames))
|
|
(if (consp fnlist)
|
|
(while (and fnlist
|
|
(progn
|
|
(setq fname (car fnlist))
|
|
(null (bdf-expand-file-name fname))))
|
|
(setq fname nil
|
|
fnlist (cdr fnlist))))
|
|
(bdf-get-font-info (or fname (car bdfnames)))))
|
|
|
|
(defun bdf-read-bitmap (bdfname offset maxlen)
|
|
"Read `BDF' font file BDFNAME to get bitmap data at file poistion OFFSET.
|
|
BDFNAME is an abosolute path name of the font file.
|
|
MAXLEN specifies how many bytes we should read at least.
|
|
The value is a list of DWIDTH, BBX, and BITMAP-STRING.
|
|
DWIDTH is a pixel width of a glyph.
|
|
BBX is a bounding box of the glyph.
|
|
BITMAP-STRING is a string representing bits by hexadecimal digits."
|
|
(let ((coding-system-for-read 'no-conversion)
|
|
dwidth bbx height yoff bitmap-string)
|
|
(condition-case nil
|
|
(with-temp-buffer
|
|
(insert-file-contents bdfname nil offset (+ offset maxlen))
|
|
(goto-char (point-min))
|
|
(search-forward "\nDWIDTH")
|
|
(setq dwidth (read (current-buffer)))
|
|
(goto-char (point-min))
|
|
(search-forward "\nBBX")
|
|
(setq bbx (vector (read (current-buffer)) (read (current-buffer))
|
|
(read (current-buffer)) (read (current-buffer)))
|
|
height (aref bbx 1) yoff (aref bbx 3))
|
|
(search-forward "\nBITMAP")
|
|
(forward-line 1)
|
|
(delete-region (point-min) (point))
|
|
(and (looking-at "\\(0+\n\\)+")
|
|
(progn
|
|
(setq height (- height (count-lines (point) (match-end 0))))
|
|
(delete-region (point) (match-end 0))))
|
|
(or (looking-at "ENDCHAR")
|
|
(progn
|
|
(search-forward "ENDCHAR" nil 'move)
|
|
(forward-line -1)
|
|
(while (looking-at "0+$")
|
|
(setq yoff (1+ yoff)
|
|
height (1- height))
|
|
(forward-line -1))
|
|
(forward-line 1)))
|
|
(aset bbx 1 height)
|
|
(aset bbx 3 yoff)
|
|
(delete-region (point) (point-max))
|
|
(goto-char (point-min))
|
|
(while (not (eobp))
|
|
(end-of-line)
|
|
(delete-char 1))
|
|
(setq bitmap-string (buffer-string)))
|
|
(error nil))
|
|
(list dwidth bbx bitmap-string)))
|
|
|
|
(defun bdf-get-bitmaps (bdfname codes)
|
|
"Return bitmap information of glyphs of CODES in `BDF' font file BDFNAME.
|
|
CODES is a list of encoding number of glyphs in the file.
|
|
The value is a list of CODE, DWIDTH, BBX, and BITMAP-STRING.
|
|
DWIDTH is a pixel width of a glyph.
|
|
BBX is a bounding box of the glyph.
|
|
BITMAP-STRING is a string representing bits by hexadecimal digits."
|
|
(let* ((font-info (bdf-find-font-info bdfname))
|
|
(absolute-path (bdf-info-absolute-path font-info))
|
|
(font-bounding-box (bdf-info-font-bounding-box font-info))
|
|
(maxlen (bdf-info-maxlen font-info))
|
|
(code-range (bdf-info-code-range font-info))
|
|
(offset-vector (bdf-info-offset-vector font-info)))
|
|
(mapcar '(lambda (x)
|
|
(cons x (bdf-read-bitmap
|
|
absolute-path
|
|
(aref offset-vector (bdf-compact-code x code-range))
|
|
maxlen)))
|
|
codes)))
|
|
|
|
;;; Interface to ps-print.el
|
|
|
|
;; Called from ps-mule-init-external-library.
|
|
(defun bdf-generate-prologue ()
|
|
(or bdf-cache
|
|
(bdf-initialize))
|
|
(ps-mule-generate-bitmap-prologue))
|
|
|
|
;; Called from ps-mule-generate-font.
|
|
(defun bdf-generate-font (charset font-spec)
|
|
(let* ((font-name (ps-mule-font-spec-name font-spec))
|
|
(font-info (bdf-find-font-info font-name))
|
|
(font-name (if (consp font-name) (car font-name) font-name)))
|
|
(ps-mule-generate-bitmap-font font-name
|
|
(ps-mule-font-spec-bytes font-spec)
|
|
(charset-width charset)
|
|
(bdf-info-size font-info)
|
|
(bdf-info-relative-compose font-info)
|
|
(bdf-info-baseline-offset font-info)
|
|
(bdf-info-font-bounding-box font-info))))
|
|
|
|
;; Called from ps-mule-generate-glyphs.
|
|
(defun bdf-generate-glyphs (font-spec code-list bytes)
|
|
(let ((font-name (ps-mule-font-spec-name font-spec)))
|
|
(mapcar '(lambda (x)
|
|
(apply 'ps-mule-generate-bitmap-glyph
|
|
(if (consp font-name) (car font-name) font-name)
|
|
x))
|
|
(bdf-get-bitmaps font-name code-list))))
|
|
|
|
(provide 'ps-bdf)
|
|
|
|
;;; ps-bdf.el ends here
|