SvgDocument Constructor

Summary

This constructor is required by System.Runtime.Serialization.ISerializable

Syntax

Objective-C

C++/CLI

Python

protected SvgDocument( 
   SerializationInfo info, 
   StreamingContext context 
)

- (nullable instancetype)initWithStream:(LTLeadStream *)stream options:(nullable LTSvgLoadOptions *)options error:(NSError **)error;

protected: 
SvgDocument(  
   SerializationInfo^ info, 
   StreamingContext context 
)

__init__(self,info,context) # Overloaded constructor

Parameters

info
The data needed to serialize or deserialize an object.

context
The source and destination of a given serialized stream.

Remarks

The SvgDocument class supports standard .NET serialization. Serialization of a SvgDocument is the process of converting the state of a Leadtools.RasterImage object into a form that can be persisted or transported. The complement of serialization is deserialization, which converts a stream into an Leadtools.RasterImage object. Together, these processes allow the image data to be easily stored and transferred.

When you serialize a SvgDocument object, all the data inside the object is saved. The SvgDocument can be reconstructed back to its original state from the stream.

Example

This example will show how to serialize and deserialize a SVG document.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Drawing; 
using Leadtools.Forms.DocumentWriters; 
using Leadtools.Svg; 
 
using Leadtools.Document.Writer; 
 
public void SvgDocumentSerializationExample() 
{ 
   SvgDocument document = null; 
 
   // Load a page from a document file as SVG 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Leadtools.pdf"); 
 
   using (var codecs = new RasterCodecs()) 
   { 
      // Set 300 as the default value for loading document files 
      codecs.Options.RasterizeDocument.Load.Resolution = 300; 
 
      document = codecs.LoadSvg(srcFileName, 1, null) as SvgDocument; 
   } 
 
   // Prepare it 
   if (!document.IsFlat) 
      document.Flat(null); 
   if (!document.Bounds.IsValid) 
      document.CalculateBounds(false); 
 
   // Show its properties 
   Console.WriteLine("Before serialization"); 
   Console.WriteLine("Bounds: " + document.Bounds.Bounds); 
   Console.WriteLine("Resolution: " + document.Bounds.Resolution); 
 
   // Serialize (save) it to a stream 
   var stream = new MemoryStream(); 
   var formatter = new BinaryFormatter(); 
   formatter.Serialize(stream, document); 
   stream.Position = 0; 
 
   // Get rid of the document 
   document.Dispose(); 
 
   // Now de-serailize (load) it back from the stream and show its properties 
   document = formatter.Deserialize(stream) as SvgDocument; 
   Console.WriteLine("After de-serialization"); 
   Console.WriteLine("Bounds: " + document.Bounds.Bounds); 
   Console.WriteLine("Resolution: " + document.Bounds.Resolution); 
 
   document.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.ByteArrayInputStream; 
import java.io.ByteArrayOutputStream; 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.ObjectInputStream; 
import java.io.ObjectOutputStream; 
import java.io.PrintStream; 
import java.nio.file.FileVisitOption; 
import java.nio.file.Files; 
import java.nio.file.Path; 
import java.nio.file.Paths; 
import java.util.stream.Stream; 
 
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.document.writer.*; 
import leadtools.svg.*; 
 
 
public void svgDocumentSerializationExample() { 
   String LEAD_VARS_ImagesDir = "C:\\LEADTOOLS23\\Resources\\Images"; 
   // Load a page from a document file as SVG 
   String srcFileName = combine(LEAD_VARS_ImagesDir, "Leadtools.pdf"); 
 
   RasterCodecs codecs = new RasterCodecs(); 
   // Set 300 as the default value for loading document files 
   codecs.getOptions().getRasterizeDocument().getLoad().setResolution(300); 
   SvgDocument document = (SvgDocument) codecs.loadSvg(srcFileName, 1, null); 
 
   // Prepare it 
   if (!document.isFlat()) 
      document.flat(null); 
   if (!document.getBounds().isValid()) 
      document.calculateBounds(false); 
 
   // Show its properties 
   System.out.println("Before serialization"); 
   System.out.printf("Bounds: %s%nResolution: %s%n%n", document.getBounds().getBounds(), 
         document.getBounds().getResolution()); 
 
   // Serialize (save) it to a stream 
   byte[] serializedObject = null; 
   try (ByteArrayOutputStream outStream = new ByteArrayOutputStream(); 
         ObjectOutputStream objectOutputStream = new ObjectOutputStream(outStream)) { 
 
      objectOutputStream.writeObject(document); 
      objectOutputStream.flush(); 
 
      serializedObject = outStream.toByteArray(); 
   } catch (Exception e) { 
      e.printStackTrace(); 
   } 
 
   // Dispose of the document 
   document.dispose(); 
 
   // Deserialize the object from the byte array 
   SvgDocument deserializedDocument = null; 
   try (ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(serializedObject); 
         ObjectInputStream objectInputStream = new ObjectInputStream(byteArrayInputStream)) { 
 
      deserializedDocument = (SvgDocument) objectInputStream.readObject(); 
   } catch (Exception e) { 
      e.printStackTrace(); 
   } 
 
   // Display the properties of the deserialized object 
   System.out.println("After de-serialization"); 
   System.out.println("Bounds: " + deserializedDocument.getBounds().getBounds()); 
   System.out.println("Resolution: " + deserializedDocument.getBounds().getResolution()); 
   assertTrue(deserializedDocument.getBounds().getBounds() != null); 
 
   // Dispose of the deserialized document 
   deserializedDocument.dispose(); 
}

Requirements

Target Platforms

Reference

SvgDocument Class

SvgDocument Members

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Help Version 23.0.2024.2.29

Leadtools.Svg Assembly

Introduction

Getting Started

Namespaces

Leadtools.Svg Namespace

Assemblies