blob: 9321c7bb304b25ef86492c52af50c41167f1eb82 (
plain)
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
|
# Redmine - project management software
# Copyright (C) 2006-2016 Jean-Philippe Lang
#
# This program 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
# of the License, or (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
require 'fileutils'
require 'mimemagic'
module Redmine
module Thumbnail
extend Redmine::Utils::Shell
CONVERT_BIN = (Redmine::Configuration['imagemagick_convert_command'] || 'convert').freeze
# Generates a thumbnail for the source image to target
def self.generate(source, target, size)
return nil unless convert_available?
unless File.exists?(target)
# Make sure we only invoke Imagemagick if this is actually an image
unless File.open(source) {|f| MimeMagic.by_magic(f).try(:image?)}
return nil
end
directory = File.dirname(target)
unless File.exists?(directory)
FileUtils.mkdir_p directory
end
size_option = "#{size}x#{size}>"
cmd = "#{shell_quote CONVERT_BIN} #{shell_quote source} -thumbnail #{shell_quote size_option} #{shell_quote target}"
unless system(cmd)
logger.error("Creating thumbnail failed (#{$?}):\nCommand: #{cmd}")
return nil
end
end
target
end
def self.convert_available?
return @convert_available if defined?(@convert_available)
@convert_available = system("#{shell_quote CONVERT_BIN} -version") rescue false
logger.warn("Imagemagick's convert binary (#{CONVERT_BIN}) not available") unless @convert_available
@convert_available
end
def self.logger
Rails.logger
end
end
end
|
