#!/usr/bin/ruby -w

require 'RMagick'

include Magick
include FileTest

size_h = 150
size_w = 300

class Image
	def quick_thumb( m_w, m_h)
		w, h = [self.columns, self.rows]
		n_w, n_h = if w <= h  
							[m_w, m_w*h/w]
					  else 
							[w/h*m_h, m_h]
					  end
		self.thumbnail( n_w, n_h )
	end
end

file = ARGV[0]
file = Dir[ARGV[0]+"/*"] if FileTest.directory?(ARGV[0])
file.each do |f| 
	img = ImageList.new( f )
	img.quick_thumb( size_w, size_h ).write( "thumb_"+f )
end

# __END__