101 lines
2.3 KiB
Ruby
101 lines
2.3 KiB
Ruby
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require 'singleton'
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class Filter
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include Singleton
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@config = {}
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@cleanup = []
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attr_accessor :config, :cleanup
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def initialize
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@config = {}
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@cleanup = []
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end
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def cleanup
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@cleanup.each do |f|
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if File.exists? f; File.unlink(f); end
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end
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end
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def recalc_pixels
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if @config['print']
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if !@config['dpi']; raise "DPI not defined"; end
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if (@config['dpi'].to_i.to_s) != @config['dpi'].to_s; raise "DPI not integer"; end
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if @config['width_inches'] && (@config['width_inches'].to_f != 0)
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@config['width'] = (@config['width_inches'].to_f * @config['dpi'].to_f).to_i
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else
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@config.delete('width')
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end
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if @config['height_inches'] && (@config['height_inches'].to_f != 0)
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@config['height'] = (@config['height_inches'].to_f * @config['dpi'].to_f).to_i
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else
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@config.delete('height')
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end
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if (!@config['width'] && !@config['height'])
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raise "No dimensions defined!"
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end
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end
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end
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#
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# Set the config
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#
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def config=(c)
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@config = c
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recalc_pixels
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end
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#
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# Build a temporary PNG from an SVG file
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#
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def inkscape(input, target)
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params = []
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width = @config['width']
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height = @config['height']
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inkscape_target = target
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if @config['rotate']
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case @config['rotate']
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when 90, -90
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t = width; width = height; height = t
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inkscape_target = target + "-pre.png"
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end
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end
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if width && (width.to_i != 0); params << "-w #{width} "; end
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if height && (height.to_i != 0); params << "-h #{height} "; end
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system("inkscape -e \"#{inkscape_target}\" -y 1.0 #{params.join(" ")} \"#{input}\"")
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if @config['rotate']
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command = [
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"\"#{inkscape_target}\"",
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"-rotate #{@config['rotate']}",
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"\"#{target}\""
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]
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convert(command)
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File.unlink(inkscape_target)
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end
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end
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def convert(command, verbose = false)
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system("convert " + (verbose ? "-verbose " : "" ) + [ command ].flatten.join(" "))
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end
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#
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# Get the dimensions of a file
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#
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def get_dimensions(input)
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dimensions = nil
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IO.popen("identify -format '%w,%h' \"#{input}\"") do |fh|
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dimensions = fh.readlines.first.split(",").collect { |d| d.to_i }
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end
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dimensions
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end
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end
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