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LowMemoryUsage Property

Summary
Gets or sets a value indicating whether to use less memory when creating a PDF file with JPEG or Fax compression.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public bool LowMemoryUsage { get; set; } 
@property (nonatomic, assign) BOOL lowMemoryUsage; 
public boolean getLowMemoryUsage() 
public void setLowMemoryUsage(boolean value) 
public: 
property bool LowMemoryUsage { 
   bool get(); 
   void set (    bool ); 
} 
LowMemoryUsage # get and set (CodecsPdfSaveOptions)

Property Value

Value Description
true To use less memory when creating a PDF file with JPEG or Fax compression.
false To not use less memory when creating a PDF file with JPEG or Fax compression. The default value is false.
Example
C#
Java
using Leadtools; 
using Leadtools.Codecs; 
 
using Leadtools.ImageProcessing.Core; 
using Leadtools.Pdf; 
 
public void CodecsPdfOptionsExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "PDFSegmentation.pdf"); 
   string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "PdfOptions.pdf"); 
   string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "PdfOptions.bmp"); 
   CodecsImageInfo info = codecs.GetInformation(srcFileName, true); 
 
   codecs.Options.Pdf.InitialPath = @"C:\MyApp\Bin"; 
 
   info = codecs.GetInformation(srcFileName, true); 
   Debug.WriteLine("Information for: {0}", srcFileName); 
   Debug.WriteLine(string.Format("Document: {0}", info.Document)); // CodecsDocumentImageInfo reference 
   Debug.WriteLine(string.Format("Document: {0}", info.Document.IsDocumentFile)); 
   Debug.WriteLine(string.Format("Document: {0}", info.Document.PageHeight)); 
   Debug.WriteLine(string.Format("Document: {0}", info.Document.PageWidth)); 
   Debug.WriteLine(string.Format("Document: {0}", info.Document.Unit)); 
   Debug.WriteLine(string.Format("Document: {0}", info.IsGray8Alpha)); 
   Debug.WriteLine(string.Format("Palette: {0}", info.GetPalette())); 
 
   // Check if the PDF engine is installed then get the load and save options of the PDF files. 
   if (codecs.Options.Pdf.IsEngineInstalled) 
   { 
      // Resulting image pixel depth. 
      // CodecsPdfOptions & CodecsPdfLoadOptions reference 
      codecs.Options.Pdf.Load.DisplayDepth = 24; 
      codecs.Options.Pdf.Load.GraphicsAlpha = 4; 
      codecs.Options.Pdf.Load.DisableCieColors = false; 
      codecs.Options.Pdf.Load.DisableCropping = false; 
      codecs.Options.Pdf.Load.EnableInterpolate = false; 
      codecs.Options.Pdf.Load.Password = ""; 
 
      // Type of font anti-aliasing to use. 
      codecs.Options.Pdf.Load.TextAlpha = 1; 
      codecs.Options.Pdf.Load.UseLibFonts = true; 
 
      // Horizontal,vertical  display resolution in dots per inch. 
      codecs.Options.RasterizeDocument.Load.XResolution = 150; 
      codecs.Options.RasterizeDocument.Load.YResolution = 150; 
 
      // CodecsRasterizeDocumentOptions & CodecsRasterizeDocumentLoadOptions reference 
      codecs.Options.RasterizeDocument.Load.BottomMargin = 0.1; 
      codecs.Options.RasterizeDocument.Load.LeftMargin = 0.1; 
      codecs.Options.RasterizeDocument.Load.PageHeight = 11; 
      codecs.Options.RasterizeDocument.Load.PageWidth = 8.5; 
      codecs.Options.RasterizeDocument.Load.Resolution = 150; 
      codecs.Options.RasterizeDocument.Load.RightMargin = 1.25; 
      codecs.Options.RasterizeDocument.Load.SizeMode = CodecsRasterizeDocumentSizeMode.None; // CodecsRasterizeDocumentSizeMode Enumeration reference 
      codecs.Options.RasterizeDocument.Load.TopMargin = 1.0; 
      codecs.Options.RasterizeDocument.Load.Unit = CodecsRasterizeDocumentUnit.Pixel; // CodecsRasterizeDocumentUnit Enumeration reference 
 
      using (RasterImage image = codecs.Load(srcFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1)) 
      { 
         // Set access rights for the user when he\she opens the file we create 
         // CodecsPdfSaveOptions reference 
         codecs.Options.Pdf.Save.AssembleDocument = true; 
         codecs.Options.Pdf.Save.ExtractText = true; 
         codecs.Options.Pdf.Save.ExtractTextGraphics = true; 
         codecs.Options.Pdf.Save.PrintDocument = false; 
         codecs.Options.Pdf.Save.FillForm = true; 
         codecs.Options.Pdf.Save.ModifyAnnotation = true; 
         codecs.Options.Pdf.Save.ModifyDocument = true; 
         codecs.Options.Pdf.Save.OwnerPassword = "LEAD Technologies"; 
         codecs.Options.Pdf.Save.PrintFaithful = false; 
         codecs.Options.Pdf.Save.TextEncoding = CodecsPdfTextEncoding.Hex; 
         codecs.Options.Pdf.Save.Use128BitEncryption = true; 
         codecs.Options.Pdf.Save.UserPassword = "LEAD"; 
 
         // Set the PDF version to be v1.4 
         codecs.Options.Pdf.Save.Version = CodecsRasterPdfVersion.V14; 
 
         // Save it as linearized (optimized for web view) 
         codecs.Options.Pdf.Save.Linearized = true; 
         codecs.Options.Pdf.Save.LowMemoryUsage = false; 
         codecs.Options.Pdf.Save.SavePdfA = false; 
         codecs.Options.Pdf.Save.SavePdfv13 = false; 
         codecs.Options.Pdf.Save.SavePdfv14 = false; 
         codecs.Options.Pdf.Save.SavePdfv15 = false; 
         codecs.Options.Pdf.Save.SavePdfv16 = false; 
         codecs.Options.Pdf.Save.SavePdfv17 = false; 
         codecs.Options.Pdf.Save.UseImageResolution = true; 
 
         // Save the image back as PDF 
         codecs.Save(image, destFileName1, RasterImageFormat.RasPdf, 24); 
      } 
 
      // And load it back before saving it as BMP 
      using (RasterImage image = codecs.Load(destFileName1)) 
      { 
         codecs.Save(image, destFileName2, RasterImageFormat.Bmp, image.BitsPerPixel); 
      } 
   } 
   else 
   { 
      Debug.WriteLine("PDF Engine is not found!"); 
   } 
 
   // Clean up 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
} 
 
import java.io.File; 
import java.io.IOException; 
import java.net.URI; 
import java.net.URISyntaxException; 
import java.nio.file.Paths; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.MinMaxBitsCommand; 
 
 
public void codecsPdfOptionsExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "PDFSegmentation.pdf"); 
   String destFileName1 = combine(LEAD_VARS_IMAGES_DIR, "PdfOptions.pdf"); 
   String destFileName2 = combine(LEAD_VARS_IMAGES_DIR, "PdfOptions.bmp"); 
   CodecsImageInfo info = codecs.getInformation(srcFileName, true); 
   codecs.getOptions().getPdf().setInitialPath("C:\\MyApp\\Bin"); 
   info = codecs.getInformation(srcFileName, true); 
   System.out.println("Information for: " + srcFileName); 
   System.out.println("Document: " + info.getDocument()); // CodecsDocumentImageInfo reference 
   System.out.println("Document: " + info.getDocument().isDocumentFile()); 
   System.out.println("Document: " + info.getDocument().getPageHeight()); 
   System.out.println("Document: " + info.getDocument().getPageWidth()); 
   System.out.println("Document: " + info.getDocument().getUnit()); 
   System.out.println("Document: " + info.isGray8Alpha()); 
   System.out.println("Palette: " + info.getPalette()); 
 
   // Check if the PDF engine is installed then get the load and save options of 
   // the PDF files. 
   if (codecs.getOptions().getPdf().getInitialPath() != null) { 
      // Resulting image pixel depth. 
      // CodecsPdfOptions & CodecsPdfLoadOptions reference 
      codecs.getOptions().getPdf().getLoad().setDisplayDepth(24); 
      codecs.getOptions().getPdf().getLoad().setGraphicsAlpha(4); 
      codecs.getOptions().getPdf().getLoad().setDisableCieColors(false); 
      codecs.getOptions().getPdf().getLoad().setDisableCropping(false); 
      codecs.getOptions().getPdf().getLoad().setEnableInterpolate(false); 
      codecs.getOptions().getPdf().getLoad().setPassword(""); 
 
      // Type of font anti-aliasing to use. 
      codecs.getOptions().getPdf().getLoad().setTextAlpha(1); 
      codecs.getOptions().getPdf().getLoad().setUseLibFonts(true); 
 
      // Horizontal,vertical display resolution in dots per inch. 
      codecs.getOptions().getRasterizeDocument().getLoad().setXResolution(150); 
      codecs.getOptions().getRasterizeDocument().getLoad().setYResolution(150); 
 
      // CodecsRasterizeDocumentOptions & CodecsRasterizeDocumentLoadOptions reference 
      codecs.getOptions().getRasterizeDocument().getLoad().setBottomMargin(0.1); 
      codecs.getOptions().getRasterizeDocument().getLoad().setLeftMargin(0.1); 
      codecs.getOptions().getRasterizeDocument().getLoad().setPageHeight(11); 
      codecs.getOptions().getRasterizeDocument().getLoad().setPageWidth(8.5); 
      codecs.getOptions().getRasterizeDocument().getLoad().setResolution(150); 
      codecs.getOptions().getRasterizeDocument().getLoad().setRightMargin(1.25); 
      codecs.getOptions().getRasterizeDocument().getLoad().setSizeMode(CodecsRasterizeDocumentSizeMode.NONE); // CodecsRasterizeDocumentSizeMode 
                                                                                                              // Enumeration 
                                                                                                              // reference 
      codecs.getOptions().getRasterizeDocument().getLoad().setTopMargin(1.0); 
      codecs.getOptions().getRasterizeDocument().getLoad().setUnit(CodecsRasterizeDocumentUnit.PIXEL); // CodecsRasterizeDocumentUnit 
                                                                                                       // Enumeration 
                                                                                                       // reference 
 
      RasterImage image = codecs.load(srcFileName, 0, CodecsLoadByteOrder.BGR_OR_GRAY, 1, 1); 
 
      // Set access rights for the user when he\she opens the file we create 
      // CodecsPdfSaveOptions reference 
      codecs.getOptions().getPdf().getSave().setAssembleDocument(true); 
      codecs.getOptions().getPdf().getSave().setExtractText(true); 
      codecs.getOptions().getPdf().getSave().setExtractTextGraphics(true); 
      codecs.getOptions().getPdf().getSave().setPrintDocument(false); 
      codecs.getOptions().getPdf().getSave().setFillForm(true); 
      codecs.getOptions().getPdf().getSave().setModifyAnnotation(true); 
      codecs.getOptions().getPdf().getSave().setModifyDocument(true); 
      codecs.getOptions().getPdf().getSave().setOwnerPassword("LEAD Technologies"); 
      codecs.getOptions().getPdf().getSave().setPrintFaithful(false); 
      codecs.getOptions().getPdf().getSave().setTextEncoding(CodecsPdfTextEncoding.HEX); 
      codecs.getOptions().getPdf().getSave().setUse128BitEncryption(true); 
      codecs.getOptions().getPdf().getSave().setUserPassword("LEAD"); 
 
      // Set the PDF version to be v1.4 
      codecs.getOptions().getPdf().getSave().setVersion(CodecsRasterPdfVersion.V14); 
 
      // Save it as linearized (optimized for web view) 
      codecs.getOptions().getPdf().getSave().setLinearized(true); 
      codecs.getOptions().getPdf().getSave().setLowMemoryUsage(false); 
      codecs.getOptions().getPdf().getSave().setSavePdfA(false); 
      codecs.getOptions().getPdf().getSave().setSavePdfv13(false); 
      codecs.getOptions().getPdf().getSave().setSavePdfv14(false); 
      codecs.getOptions().getPdf().getSave().setSavePdfv15(false); 
      codecs.getOptions().getPdf().getSave().setSavePdfv16(false); 
      codecs.getOptions().getPdf().getSave().setSavePdfv17(false); 
      codecs.getOptions().getPdf().getSave().setUseImageResolution(true); 
 
      // Save the image back as PDF 
      codecs.save(image, destFileName1, RasterImageFormat.PDF_LEAD_MRC, 24); 
      image = null; 
 
      // And load it back before saving it as BMP 
      image = codecs.load(destFileName1); 
      codecs.save(image, destFileName2, RasterImageFormat.BMP, image.getBitsPerPixel()); 
 
      assertTrue("File unsuccessfully saved to " + destFileName2, (new File(destFileName2)).exists()); 
      System.out.printf("File successfully saved to %s%n", destFileName2); 
 
      image = null; 
   } else 
      System.out.println("PDF Engine is not found!"); 
 
   // Clean up 
   codecs.dispose(); 
}
Requirements

Target Platforms

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