module Asposeimagingjava::ConvertingSpecificPortionOfDjvuPage
Public Class Methods
new()
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# File lib/asposeimagingjava/djvu/convertingspecificportionofdjvupage.rb, line 3 def initialize() data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/' # Load an existing image (of type bmp) in an instance of Image class image = Rjb::import('com.aspose.imaging.Image').load(data_dir + "demo.djvu") # Create an instance of PngOptions export_options = Rjb::import('com.aspose.imaging.imageoptions.PngOptions').new # Set ColorType to Grayscale export_options.setColorType(Rjb::import('com.aspose.imaging.fileformats.png.PngColorType').Grayscale) # Create an instance of Rectangle and specify the portion on DjVu page export_area = Rjb::import('com.aspose.imaging.Rectangle').new(20, 20, 500, 500) # Specify the DjVu page index export_page_index = 2 # Initialize an instance of DjvuMultiPageOptions # while passing index of DjVu page index and instance of Rectangle covering the area to be exported export_options.setMultiPageOptions(Rjb::import('com.aspose.imaging.imageoptions.DjvuMultiPageOptions').new(export_page_index, export_area)) # Save the result in PDF format image.save(data_dir + "SpecificPagePortion.png", export_options) # Display Status. puts "Converted specific page portion DjVu page to image successfully!" end