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Change a PDF Page's MediaBox in Ruby

Sample Ruby code for using PDFTron SDK to change a page's MediaBox using Rect class. Learn more about our PDF Editing & Manipulation Library.

Step 1: Get your free trial license key, or sign in

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Step 2: Add the code:

#---------------------------------------------------------------------------------------
# Copyright (c) 2001-2019 by PDFTron Systems Inc. All Rights Reserved.
# Consult LICENSE.txt regarding license information.
#---------------------------------------------------------------------------------------

require '../../../PDFNetC/Lib/PDFNetRuby'
include PDFNetRuby

$stdout.sync = true

	PDFNet.Initialize
	
	# Relative path to the folder containing the test files.
	input_path = "../../TestFiles/"
	output_path = "../../TestFiles/Output/"
	
	# Test  - Adjust the position of content within the page.
	puts "_______________________________________________"
	puts "Opening the input pdf..."
	
	input_doc = PDFDoc.new(input_path + "tiger.pdf")
	input_doc.InitSecurityHandler
	pg_itr1 = input_doc.GetPageIterator
	
	media_box = Rect.new(pg_itr1.Current.GetMediaBox)
	
	media_box.x1 -= 200	 # translate the page 200 units (1 uint = 1/72 inch)
	media_box.x2 -= 200
	
	media_box.Update
	
	input_doc.Save(output_path + "tiger_shift.pdf", 0)
	input_doc.Close
	
	puts "Done. Result saved in tiger_shift..."