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1 | 1 | # Redmine - project management software |
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2 | 2 | # Copyright (C) 2006-2012 Jean-Philippe Lang |
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3 | 3 | # |
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4 | 4 | # This program is free software; you can redistribute it and/or |
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5 | 5 | # modify it under the terms of the GNU General Public License |
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6 | 6 | # as published by the Free Software Foundation; either version 2 |
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7 | 7 | # of the License, or (at your option) any later version. |
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8 | 8 | # |
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9 | 9 | # This program is distributed in the hope that it will be useful, |
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10 | 10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | 11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | 12 | # GNU General Public License for more details. |
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13 | 13 | # |
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14 | 14 | # You should have received a copy of the GNU General Public License |
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15 | 15 | # along with this program; if not, write to the Free Software |
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16 | 16 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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17 | 17 | |
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18 | 18 | require 'fileutils' |
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19 | 19 | |
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20 | 20 | module Redmine |
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21 | 21 | module Thumbnail |
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22 | 22 | extend Redmine::Utils::Shell |
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23 | 23 | |
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24 | 24 | CONVERT_BIN = (Redmine::Configuration['imagemagick_convert_command'] || 'convert').freeze |
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25 | 25 | |
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26 | 26 | # Generates a thumbnail for the source image to target |
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27 | 27 | def self.generate(source, target, size) |
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28 | 28 | return nil unless convert_available? |
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29 | 29 | unless File.exists?(target) |
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30 | 30 | directory = File.dirname(target) |
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31 | 31 | unless File.exists?(directory) |
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32 | 32 | FileUtils.mkdir_p directory |
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33 | 33 | end |
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34 | 34 | size_option = "#{size}x#{size}>" |
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35 | 35 | cmd = "#{shell_quote CONVERT_BIN} #{shell_quote source} -thumbnail #{shell_quote size_option} #{shell_quote target}" |
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36 | 36 | unless system(cmd) |
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37 | 37 | logger.error("Creating thumbnail failed (#{$?}):\nCommand: #{cmd}") |
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38 | 38 | return nil |
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39 | 39 | end |
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40 | 40 | end |
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41 | 41 | target |
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42 | 42 | end |
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43 | 43 | |
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44 | 44 | def self.convert_available? |
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45 | 45 | return @convert_available if defined?(@convert_available) |
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46 | logger.warn("testing for convert...") | |
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47 | 46 | @convert_available = system("#{shell_quote CONVERT_BIN} -version") rescue false |
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48 | 47 | logger.warn("Imagemagick's convert binary (#{CONVERT_BIN}) not available") unless @convert_available |
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49 | 48 | @convert_available |
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50 | 49 | end |
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51 | 50 | |
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52 | 51 | def self.logger |
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53 | 52 | Rails.logger |
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54 | 53 | end |
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55 | 54 | end |
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56 | 55 | end |
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