module Asposeslidesjava
  module ConvertingToTiff
    def initialize()
        # Converting Presentation to TIFF with default size
        convert_with_default_size()

        # Converting Presentation to TIFF with custom size
        convert_with_custom_size()
    end

    def convert_with_default_size()
        data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/'
                
        # Instantiate a Presentation object that represents a PPTX file
        pres = Rjb::import('com.aspose.slides.Presentation').new(data_dir + "Aspose.pptx")

        # Saving the PPTX presentation to Tiff format
        save_format = Rjb::import('com.aspose.slides.SaveFormat')
        pres.save(data_dir + "Aspose.tiff", save_format.Tiff)

        puts "Document has been converted, please check the output file."
    end    

    def convert_with_custom_size()
        data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/'
                
        # Instantiate a Presentation object that represents a PPTX file
        pres = Rjb::import('com.aspose.slides.Presentation').new(data_dir + "Aspose.pptx")

        # Instantiate the TiffOptions class
        opts = Rjb::import('com.aspose.slides.TiffOptions').new

        # Setting compression type
        tiff_compression_types = Rjb::import('com.aspose.slides.TiffCompressionTypes')
        opts.setCompressionType (tiff_compression_types.Default)

        # Compression Types
        #Default - Specifies the default compression scheme (LZW).
        #None - Specifies no compression.
        #CCITT3
        #CCITT4
        #LZW
        #RLE

        # Depth – depends on the compression type and cannot be set manually.
        # Resolution unit – is always equal to “2” (dots per inch)

        #Setting image DPI
        opts.setDpiX(200)
        opts.setDpiY(100)

        # Set Image Size
        opts.setImageSize(Rjb::import('java.awt.Dimension').new(1728, 1078))

        # Save the presentation to TIFF with specified image size
        save_format = Rjb::import('com.aspose.slides.SaveFormat')
        pres.save(data_dir + "Aspose-Custom-Size.tiff", save_format.Tiff, opts)

        puts "Document has been converted, please check the output file."
    end   
  end
end