Optimize a PDF in C# and Java

using System; 

 

using pdftron; 

using pdftron.Common; 

using pdftron.SDF; 

using pdftron.PDF; 

 

namespace OptimizerTest 

{ 

   class Class1 

   { 

      static Class1() { } 

 

      static void Main(string[] args) 

      { 

         PDFNet.Initialize(PDFTronLicense.Key); 

 

         string input_path = @"file path to input pdf file"; 

         string output_path = @"file path to output pdf file"; 

 

         try 

         { 

            using (PDFDoc doc = new PDFDoc(input_path)) 

            { 

               doc.InitSecurityHandler(); 

 

               Optimizer.ImageSettings image_settings = new Optimizer.ImageSettings(); 

 

               // low quality jpeg compression 

               image_settings.SetCompressionMode(Optimizer.ImageSettings.CompressionMode.e_jpeg); 

               image_settings.SetQuality(1); 

         	image_settings.SetDownsampleMode(Optimizer.ImageSettings.DownsampleMode.e_default); 

               // Set the output dpi to be standard screen resolution 

               image_settings.SetImageDPI(144, 96); 

 

               // this option will recompress images not compressed with 

               // jpeg compression and use the result if the new image 

               // is smaller. 

               image_settings.ForceRecompression(true); 

 

               // this option is not commonly used since it can  

               // potentially lead to larger files.  It should be enabled 

               // only if the output compression specified should be applied 

               // to every image of a given type regardless of the output image size 

               //image_settings.ForceChanges(true); 

 

               // use the same settings for both color and grayscale images 

               Optimizer.OptimizerSettings opt_settings = new Optimizer.OptimizerSettings(); 

               opt_settings.SetColorImageSettings(image_settings); 

               opt_settings.SetGrayscaleImageSettings(image_settings); 

 

               //monochrome image settings and default settings for color and grayscale images. 

               Optimizer.MonoImageSettings mono_image_settings = new Optimizer.MonoImageSettings(); 

 

               mono_image_settings.SetCompressionMode(Optimizer.MonoImageSettings.CompressionMode.e_jbig2); 

               mono_image_settings.ForceRecompression(true); 

               mono_image_settings.SetDownsampleMode(Optimizer.MonoImageSettings.DownsampleMode.e_default); 

 

               opt_settings.SetMonoImageSettings(mono_image_settings); 

 

               Optimizer.Optimize(doc, opt_settings); 

 

               doc.Save(output_path, SDFDoc.SaveOptions.e_linearized); 

            } 

         } 

         catch (PDFNetException e) 

         { 

            Console.WriteLine(e.Message); 

         } 

 

         PDFNet.Terminate(); 

      } 

   } 

} 

import com.pdftron.pdf.*; 

import com.pdftron.sdf.SDFDoc; 

 

public class OptimizerTest { 

  

  public static void main(String[] args) { 

    String input_path = "file path to input pdf file"; 

    String output_path = "file path to output pdf file"; 

 

    PDFNet.initialize(PDFTronLicense.Key()); 

 

    try (PDFDoc doc = new PDFDoc(input_path + input_filename)) { 

      doc.initSecurityHandler(); 

 

      Optimizer.ImageSettings image_settings = new Optimizer.ImageSettings(); 

 

      // low quality jpeg compression 

      image_settings.setCompressionMode(Optimizer.ImageSettings.e_jpeg); 

      image_settings.setQuality(1); 

      image_settings.SetDownsampleMode(Optimizer.ImageSettings.DownsampleMode.e_default); 

      // Set the output dpi to be standard screen resolution 

      image_settings.setImageDPI(144, 96); 

 

      // this option will recompress images not compressed with 

      // jpeg compression and use the result if the new image 

      // is smaller. 

      image_settings.forceRecompression(true); 

 

      // this option is not commonly used since it can 

      // potentially lead to larger files. It should be enabled 

      // only if the output compression specified should be applied 

      // to every image of a given type regardless of the output image size 

      //image_settings.forceChanges(true); 

 

      Optimizer.OptimizerSettings opt_settings = new Optimizer.OptimizerSettings(); 

      opt_settings.setColorImageSettings(image_settings); 

      opt_settings.setGrayscaleImageSettings(image_settings); 

 

      Optimizer.MonoImageSettings mono_image_settings = new Optimizer.MonoImageSettings(); 

      mono_image_settings.SetCompressionMode(Optimizer.MonoImageSettings.CompressionMode.e_jbig2); 

      mono_image_settings.ForceRecompression(true); 

      mono_image_settings.SetDownsampleMode(Optimizer.MonoImageSettings.DownsampleMode.e_default); 

 

      Optimizer.optimize(doc, opt_settings); 

 

      doc.save(output_path + input_filename3, SDFDoc.SaveMode.LINEARIZED, null); 

    } catch (Exception e) { 

      e.printStackTrace(); 

      return; 

    } 

 

    PDFNet.terminate(); 

  } 

}