119 lines
2.8 KiB
Ruby
119 lines
2.8 KiB
Ruby
require File.dirname(__FILE__) + '/InputFilter.rb'
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class SVGToTempBitmap < InputFilter
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include PrintHandling
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#
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# select which build method to use based on the number of provided images.
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#
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def build(input)
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(input.instance_of? Array) ? multiple(input) : single(input)
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end
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#
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# process a single input file, possibly splitting it into two output files if it's a spread
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#
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def single(input)
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filename = Dir.pwd + '/' + @output_filename
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inkscape(input, filename)
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@cleanup << filename
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if @config['spread']
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targets = build_spread(filename)
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@cleanup.concat targets
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return targets
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end
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filename
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end
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def build_spread(filename)
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width, height = get_dimensions(filename)
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targets = []
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[ [ "left", 0 ], [ "right", width / 2 ] ].each do |side, offset|
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target = filename + "-#{side}.png"
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command = [
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"\"#{filename}\"",
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"-gravity Northwest",
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"-crop #{width/2}x#{height}+#{offset}+0",
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"+repage",
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"\"#{target}\""
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]
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convert(command)
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targets << target
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end
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targets
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end
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#
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# combine multiple input files onto a single page-sized canvas.
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# images are added left-to-right and top-to-bottom starting from the top-left of the page.
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# leave a grid square blank by passing the filename "/blank".
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#
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def multiple(files)
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if @config['spread']; raise "Spreads and grids combined do not make sense"; end
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width, height = @config['grid'].split("x").collect { |f| f.to_f }
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page_width, page_height = calculate_page_size
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grid_width = page_width / width
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grid_height = page_height / height
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joined_files = join_files(files, width)
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command = [
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"-size #{page_width}x#{page_height}",
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"xc:white"
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]
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command.concat generate_joined_files_command(joined_files, grid_width, grid_height)
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command << "\"#{@output_filename}\""
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convert(command)
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@cleanup.concat joined_files.collect { |file, x, y| file }
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@cleanup << @output_filename
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@output_filename
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end
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def join_files(files, width)
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joined_files = []
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files.each_index do |i|
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x = i % width
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y = (i / width).floor
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if files[i].split('/').last != "blank"
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tmp_file = @output_filename + "-#{i}.png"
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inkscape(Dir.pwd + '/' + files[i], tmp_file)
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joined_files << [ tmp_file, x, y ]
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end
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end
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joined_files
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end
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def generate_joined_files_command(files, grid_width, grid_height)
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command = []
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files.each do |file, x, y|
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image_width, image_height = get_dimensions(file)
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x_offset = (grid_width - image_width) / 2
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y_offset = (grid_height - image_height) / 2
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command << "\"#{file}\" -geometry +#{x * grid_width + x_offset}+#{y * grid_height + y_offset} -composite"
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end
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command
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end
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end
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