;;;;
;;;; source file of the GNU LilyPond music typesetter
;;;;
-;;;; (c) 2005 Jan Nieuwenhuizen <janneke@gnu.org>
+;;;; (c) 2005--2006 Jan Nieuwenhuizen <janneke@gnu.org>
(define-module (scm ps-to-png))
(ice-9 optargs)
(ice-9 regex)
(ice-9 rw)
- (srfi srfi-1))
+ (srfi srfi-1)
+ (srfi srfi-13)
+ (srfi srfi-14)
+ (lily)
+ )
;; gettext wrapper for guile < 1.7.2
(if (defined? 'gettext)
(define-public _ gettext)
(define-public (_ x) x))
+(define PLATFORM
+ (string->symbol
+ (string-downcase
+ (car (string-tokenize (vector-ref (uname) 0) char-set:letter)))))
+
(define (re-sub re sub string)
(regexp-substitute/global #f re string 'pre sub 'post))
+(define (search-executable names)
+ (define (helper path lst)
+ (if (null? (cdr lst))
+ (car lst)
+ (if (search-path path (car lst)) (car lst)
+ (helper path (cdr lst)))))
+
+ (let ((path (parse-path (getenv "PATH"))))
+ (helper path names)))
+
+(define (search-gs)
+ (search-executable '("gs-nox" "gs-8.15" "gs")))
+
(define (gulp-port port max-length)
(let ((str (make-string max-length)))
- (read-string!/partial str port)
+ (read-string!/partial str port 0 max-length)
str))
-(define (dir-listing dir-name)
- (define (dir-helper dir lst)
- (let ((e (readdir dir)))
- (if (eof-object? e) lst (dir-helper dir (cons e lst)))))
- (reverse (dir-helper (opendir dir-name) '())))
+(define (gulp-file nm len)
+
+ ;; string routines barf when strlen() != string-length,.
+ ;; which may happen as side effect of read-string!/partial.
+
+ ; (gulp-port (open-file nm "r") len))
+ (ly:gulp-file nm len))
-(define (dir-re dir re)
- (filter (lambda (x) (string-match re x)) (dir-listing dir)))
(define BOUNDING-BOX-RE
"^%%BoundingBox: (-?[0-9]+) (-?[0-9]+) (-?[0-9]+) (-?[0-9]+)")
~S\
-c showpage\
-c quit 2>~S"
- file-name bbox))
+ file-name bbox))
(status (system cmd))
- (s (gulp-port (open-file bbox "r") 10240))
+ (s (gulp-file d bbox 10240))
(m (string-match BOUNDING_BOX_RE s)))
- (display m)
- (newline)
+
(if m
(list->vector
(map (lambda (x) (string->number (car x))) (vector->list m)))
#f)))
+
+;; copy of ly:system. ly:* not available via lilypond-ps2png.scm
+(define (my-system be-verbose exit-on-error cmd)
+ (define status 0)
+ (if be-verbose
+ (begin
+ (format (current-error-port) (_ "Invoking `~a'...") cmd)
+ (newline (current-error-port))))
+
+
+ (set! status (system cmd))
+
+ (if (not (= status 0))
+ (begin
+ (format (current-error-port)
+ (format #f (_ "~a exited with status: ~S") "GS" status))
+ (if exit-on-error
+ (exit 1))))
+
+ status)
+
+(define (scale-down-image be-verbose factor file)
+ (let* ((status 0)
+ (percentage (* 100 (/ 1.0 factor)))
+ (old (string-append file ".old")))
+
+ (rename-file file old)
+ (my-system be-verbose
+ #t
+ (format #f "convert -scale \"~a%\" ~a ~a" percentage old file))
+ (delete-file old)
+ ))
+
+(define-public (ps-page-count ps-name)
+ (let*
+ ((byte-count 10240)
+ (header (gulp-file ps-name byte-count))
+ (first-null (string-index header #\nul))
+ (match (string-match "%%Pages: ([0-9]+)"
+ (if (number? first-null)
+ (substring header 0 first-null)
+ header))))
+
+ (if match
+ (string->number (match:substring match 1))
+ 0)))
+
(define-public (make-ps-images ps-name . rest)
(let-optional
rest ((resolution 90)
(paper-size "a4")
(rename-page-1? #f)
- (verbose? #f))
+ (verbose? #f)
+ (aa-factor 1)
+ )
+
(let* ((base (basename (re-sub "[.]e?ps" "" ps-name)))
- (header (gulp-port (open-file ps-name "r") 10240))
(png1 (string-append base ".png"))
(pngn (string-append base "-page%d.png"))
- (pngn-re (re-sub "%d" "[0-9]*" pngn))
- (multi-page? (and (string-match "\n%%Pages: " header)
- (not (string-match "\n%%Pages: 1\n" header))))
+ (page-count (ps-page-count ps-name))
+
+ (multi-page? (> page-count 1))
(output-file (if multi-page? pngn png1))
- ;;png16m is because Lily produces color nowadays.
- (cmd (if multi-page?
- (format #f "gs\
+ ;; png16m is because Lily produces color nowadays.
+ ;; can't use pngalpha device, since IE is broken.
+ ;;
+ (gs-variable-options
+ (if multi-page?
+ (format #f "-sPAPERSIZE=~a" paper-size)
+ "-dEPSCrop"))
+
+ (cmd (format #f "~a\
+ ~a\
+ ~a\
-dGraphicsAlphaBits=4\
- -dNOPAUSE\
-dTextAlphaBits=4\
- -sDEVICE=png16m\
- -sOutputFile='~a'\
- -sPAPERSIZE=~a\
- -q\
- -r~S\
- '~a'\
- -c showpage\
- -c quit" output-file paper-size resolution ps-name)
- (format #f "gs\
- -s\
- -dGraphicsAlphaBits=4\
- -dEPSCrop\
-dNOPAUSE\
- -dTextAlphaBits=4\
-sDEVICE=png16m\
- -sOutputFile='~a'\
- -q\
+ -sOutputFile=~S\
-r~S\
- '~a'\
- -c quit" output-file resolution ps-name)))
- (foo (for-each delete-file (append (dir-re "." png1)
- (dir-re "." pngn-re))))
- (bar (if verbose?
- (begin
- (format (current-error-port) (_ "Invoking `~a'...") cmd)
- (newline (current-error-port)))))
- (status (system cmd)))
- (if (not (= status 0))
+ ~S\
+ -c quit"
+ (search-gs)
+ (if verbose? "" "-q")
+ gs-variable-options
+ output-file
+ (* aa-factor resolution) ps-name))
+ (status 0)
+ (files '()))
+
+ ;; The wrapper on windows cannot handle `=' signs,
+ ;; gs has a workaround with #.
+ (if (eq? PLATFORM 'windows)
+ (begin
+ (set! cmd (re-sub "=" "#" cmd))
+ (set! cmd (re-sub "-dSAFER " "" cmd))))
+
+ (set! status (my-system verbose? #f cmd))
+
+ (set! files
+ (if multi-page?
+ (map
+ (lambda (n)
+ (format "~a-page~a.png" base (1+ n)))
+ (iota page-count))
+ (list (format "~a.png" base))))
+
+ (if (not (= 0 status))
(begin
- (map delete-file
- (append (dir-re "." png1) (dir-re "." pngn-re)))
- (format (current-error-port)
- (format #f (_ "~a exited with status: ~S") "GS" status))
+ (map delete-file files)
(exit 1)))
+
(if (and rename-page-1? multi-page?)
- (rename (re-sub "%d" "1" pngn) png1))
- (append (dir-re "." png1) (dir-re "." pngn-re)))))
+ (begin
+ (rename-file (re-sub "%d" "1" pngn) png1)
+ (set! files
+ (cons png1
+ (cdr files)))
+ ))
+
+ (if (not (= 1 aa-factor))
+ (for-each (lambda (f) (scale-down-image verbose? aa-factor f))
+ files))
+
+ files)))
projects / lilypond.git / blobdiff