Top Level Namespace

Defined Under Namespace

Classes: Tiler

Instance Method Summary collapse

Instance Method Details

#main ⇒ Object

Runs this as a script



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# File 'lib/imagetiler.rb', line 134

def main

	OptionParser.accept(Range, /(\d+)\.\.(\d+)/) do |range,start,finish|
		Range.new(start.to_i,finish.to_i)
	end

	OptionParser.accept(Magick::Pixel,/(\d+),(\d+),(\d+),(\d+)/) do |pixel, r,g,b,a|
		Magick::Pixel.new(r.to_f,g.to_f,b.to_f,a.to_f)
	end

	options = {}

	opts = OptionParser.new do |opts|
		opts.banner = "Image Tiler for Google Maps\nUsage: tile_image.rb [options] IMAGE_FILE \nExample: tile_image.rb -o ./tiles -z 11..12 -p 602,768,11,78,112,1.91827348 ./input_files/map.jpg"
		opts.separator "" 
		opts.on("-o","--output OUTPUT_DIR","Directory where the tiles will be created") do |dir| 
			options[:output_dir] = dir
		end
		opts.on("-f","--format FORMAT","Image format in which to get the file (gif, jpeg, png...). Is jpg by default") do |format|
			options[:format] = format
		end
		opts.on("-z","--zoom_levels ZOOM_RANGE",Range,"Range of zoom values at which the tiles must be generated. Is 0..4 by default") do |range|
			options[:zoom_levels] = range
		end
		opts.on("-b","--background COLOR",Magick::Pixel,"Background color components. Is fully transparent par default") do |bg|
			options[:bg_color] = bg
		end
		opts.on("-p","--prefix PREFIX","Prefix to file output. Is 'tile' by default") do |prefix|
			options[:prefix] = prefix
		end
		opts.on_tail("-h", "--help", "Show this message") do
			puts opts
			exit
		end
	end

	opts.parse!(ARGV)

	#test the presence of all the options and exit with an error message
	error = []
	error << "No output directory defined (-o,--output)" if options[:output_dir].nil?
	error << "No input files defined" if ARGV.empty?

	unless error.empty?
		puts error * "\n" + "\n\n"
		puts opts
		exit
	end

	t = Tiler.new
	t.make_tiles(ARGV[0], options) # ignore all input files but first

end