56 lines
2.0 KiB
Ruby
56 lines
2.0 KiB
Ruby
# Redmine - project management software
|
|
# Copyright (C) 2006-2013 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'
|
|
|
|
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)
|
|
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
|