1 ;;;; This file is part of LilyPond, the GNU music typesetter.
3 ;;;; Copyright (C) 2005--2015 Jan Nieuwenhuizen <janneke@gnu.org>
5 ;;;; LilyPond is free software: you can redistribute it and/or modify
6 ;;;; it under the terms of the GNU General Public License as published by
7 ;;;; the Free Software Foundation, either version 3 of the License, or
8 ;;;; (at your option) any later version.
10 ;;;; LilyPond is distributed in the hope that it will be useful,
11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ;;;; GNU General Public License for more details.
15 ;;;; You should have received a copy of the GNU General Public License
16 ;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
18 (define-module (scm ps-to-png))
30 ;; FIXME: use backend-library for duplicates and stubs; lilypond-ps2png.scm is no more
32 (define-public _ gettext)
34 (define (re-sub re sub string)
35 (regexp-substitute/global #f re string 'pre sub 'post))
37 (define-public (gulp-file file-name . max-size)
38 (ly:gulp-file file-name (if (pair? max-size) (car max-size))))
40 ;; copy of ly:system. ly:* not available via lilypond-ps2png.scm
41 (define (my-system be-verbose exit-on-error cmd)
43 (ly:debug (_ "Invoking `~a'...\n") cmd)
44 (set! status (system cmd))
45 (if (not (= status 0))
47 (ly:error (_ "~a exited with status: ~S") "GS" status)
48 (if exit-on-error (exit 1))))
51 (define (scale-down-image factor file)
52 (let* ((old (string-append file ".old"))
53 ;; Netpbm commands (pngtopnm, pnmscale, pnmtopng)
54 ;; outputs only standard output instead of a file.
55 ;; So we need pipe and redirection.
56 ;; However, ly:system can't handle them.
57 ;; Therefore, we use /bin/sh for handling them.
58 ;; FIXME: MinGW (except Cygwin) doesn't have /bin/sh.
64 "pngtopnm \"~a\" | pnmscale -reduce ~a | pnmtopng -compression 9 > \"~a\""
67 (rename-file file old)
71 (define-public (ps-page-count ps-name)
72 (let* ((byte-count 10240)
73 (header (gulp-file ps-name byte-count))
74 (first-null (string-index header #\nul))
75 (match (string-match "%%Pages: ([0-9]+)"
76 (if (number? first-null)
77 (substring header 0 first-null)
79 (if match (string->number (match:substring match 1)) 0)))
81 (define-public (make-ps-images base-name tmp-name is-eps . rest)
88 (be-verbose (ly:get-option 'verbose))
89 (pixmap-format 'png16m)
90 (anti-alias-factor 1))
92 (let* ((format-str (format #f "~a" pixmap-format))
94 ((string-contains format-str "png") "png")
95 ((string-contains format-str "jpg") "jpeg")
96 ((string-contains format-str "jpeg") "jpeg")
98 (ly:error "Unknown pixmap format ~a" pixmap-format))))
99 (png1 (format #f "~a.~a" base-name extension))
100 (pngn (format #f "~a-page%d.~a" base-name extension))
101 (page-count (ps-page-count tmp-name))
102 (multi-page? (> page-count 1))
104 ;; Escape `%' (except `page%d') for ghostscript
105 (base-name-gs (string-join
106 (string-split base-name #\%)
108 (png1-gs (format #f "~a.~a" base-name-gs extension))
109 (pngn-gs (format #f "~a-page%d.~a" base-name-gs extension))
110 (output-file (if multi-page? pngn-gs png1-gs))
112 (*unspecified* (if #f #f))
114 (remove (lambda (x) (eq? x *unspecified*))
117 (if (ly:get-option 'verbose) *unspecified* "-q")
118 (if (or (ly:get-option 'gs-load-fonts)
119 (ly:get-option 'gs-load-lily-fonts)
120 (eq? PLATFORM 'windows))
126 (ly:format "-dDEVICEWIDTHPOINTS=~$" page-width))
129 (ly:format "-dDEVICEHEIGHTPOINTS=~$" page-height))
130 "-dGraphicsAlphaBits=4"
134 (ly:format "-sDEVICE=~a" pixmap-format)
135 (string-append "-sOutputFile=" output-file)
136 (ly:format "-r~a" (* anti-alias-factor resolution))
137 (string-append "-f" tmp-name))))
146 (format #f "~a-page~a.png" base-name (1+ n)))
148 (list (format #f "~a.png" base-name))))
150 (if (and rename-page-1 multi-page?)
152 (rename-file (re-sub "%d" "1" pngn) png1)
158 (if (not (= 1 anti-alias-factor))
160 (lambda (f) (scale-down-image anti-alias-factor f)) files))