54 lines
1.7 KiB
Ruby
54 lines
1.7 KiB
Ruby
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begin
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require 'rubygems'
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gem 'rmagick'
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require 'rvg/rvg'
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rescue Exception => e
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end
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module Blueprint
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# Uses ImageMagick and RMagick to generate grid.png file
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class GridBuilder
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begin
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include Magick
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rescue Exception => e
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end
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attr_reader :column_width, :gutter_width, :output_path, :able_to_generate
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# ==== Options
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# * <tt>options</tt>
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# * <tt>:column_width</tt> -- Width (in pixels) of current grid column
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# * <tt>:gutter_width</tt> -- Width (in pixels) of current grid gutter
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# * <tt>:output_path</tt> -- Output path of grid.png file
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def initialize(options={})
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@able_to_generate = Magick::Long_version rescue false
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return unless @able_to_generate
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@column_width = options[:column_width] || Blueprint::COLUMN_WIDTH
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@gutter_width = options[:gutter_width] || Blueprint::GUTTER_WIDTH
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@output_path = options[:output_path] || Blueprint::SOURCE_PATH
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end
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# generates (overwriting if necessary) grid.png image to be tiled in background
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def generate!
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return false unless self.able_to_generate
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total_width = self.column_width + self.gutter_width
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height = 18
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RVG::dpi = 100
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rvg = RVG.new((total_width.to_f/RVG::dpi).in, (height.to_f/RVG::dpi).in).viewbox(0, 0, total_width, height) do |canvas|
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canvas.background_fill = 'white'
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canvas.g do |column|
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column.rect(self.column_width, height).styles(:fill => "#e8effb")
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end
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canvas.g do |baseline|
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baseline.line(0, (height - 1), total_width, (height- 1)).styles(:fill => "#e9e9e9")
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end
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end
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FileUtils.mkdir self.output_path unless File.exists? self.output_path
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rvg.draw.write(File.join(self.output_path, "grid.png"))
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end
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end
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end
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