71 lines
1.6 KiB
Ruby
71 lines
1.6 KiB
Ruby
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module PrintHandling
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#
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# calculate the page size in PPI
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#
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def calculate_page_size
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ok = false
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if @config['dpi']
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if @config['page_size']
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case @config['page_size'].downcase
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when "letter", "letter_portrait"
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page_width = 8.5; page_height = 11; ok = true
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when "letter_landscape"
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page_width = 11; page_height = 8.5; ok = true
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when "half_letter_landscape"
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page_width = 5.5; page_height = 8.5; ok = true
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end
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else
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if @config['page_width_inches'] && @config['page_height_inches']
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page_width = @config['page_width_inches']
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page_height = @config['page_height_inches']
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ok = true
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end
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end
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if ok
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page_width *= @config['dpi'].to_i
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page_height *= @config['dpi'].to_i
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end
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end
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if !ok
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page_width = @config['page_width']
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page_height = @config['page_height']
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end
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[ page_width, page_height ]
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end
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#
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# align the provided image on a white page
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#
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def build_for_print(input, output, side = "none")
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page_width, page_height = calculate_page_size
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command = [
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"-density #{config['dpi']}",
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"-size #{page_width.to_i}x#{page_height.to_i}",
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"xc:white"
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]
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case side
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when "none"
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command << "-gravity Center"
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when "left"
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command << "-gravity East"
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when "right"
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command << "-gravity West"
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end
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command << "-draw 'image Over 0,0 0,0 \"#{input}\"'"
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if output[0,1] == "|"
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command << output[1..-1]
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else
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command << "\"#{output}\""
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end
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convert(command)
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end
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end
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