[RGSS] RPG_FileTest.exist?

module RPG_FileTest

  def self.exist?(filename)
    dir,ext = File.dirname(filename) + '/', File.extname(filename)
    base = File.basename(filename, ext)
    if ['.png','.jpg','.bmp'].include?(ext.downcase)
      cache = defined?(Cache) ? Cache : RPG::Cache
      (cache.load_bitmap(dir,base) && true) rescue false
    elsif ['.rxdata','.rvdata','.rvdata2','.rb','.txt'].include?(ext.downcase)
      (load_data(filename) && true) rescue false
    else
      File.exist?(filename)
    end
  end
end