CodecsRedirectOpenEventArgs Class

Summary

Information for the RasterCodecs.RedirectOpen event.

Syntax

C++/CLI

Java

Python

public class CodecsRedirectOpenEventArgs : EventArgs

public class CodecsRedirectOpenEvent extends LeadEvent

public ref class CodecsRedirectOpenEventArgs : public System.EventArgs

class CodecsRedirectOpenEventArgs(EventArgs):

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
       
// Redirect Read event example 
FileStream myStream; 
 
// Redirect Open event example 
private void Codecs_Open(object sender, CodecsRedirectOpenEventArgs e) 
{ 
   myStream = new FileStream(e.FileName, e.Mode); 
   Console.WriteLine("Access: {0}, Share: {1}", e.Access, e.Share); 
   e.Success = true; 
} 
 
// Redirect Seek event example 
private void Codecs_Seek(object sender, CodecsRedirectSeekEventArgs e) 
{ 
   myStream.Seek(e.Offset, e.Origin); 
   e.Offset = myStream.Position; 
} 
 
// Redirect Read event example 
private void Codecs_Read(object sender, CodecsRedirectReadEventArgs e) 
{ 
   byte[] byteBuffer = new byte[e.Count]; 
   myStream.Read(byteBuffer, 0, e.Count); 
   Marshal.Copy(byteBuffer, 0, e.Buffer, e.Count); 
   e.Read = e.Count; 
   Debug.WriteLine("The number of bytes that read request should copy to the buffer is : {0}", e.Count); 
   Debug.WriteLine("The actual number of bytes that this read request has copied to Buffer is : {0}", e.Read); 
} 
 
// Redirect Write event example 
private void Codecs_Write(object sender, CodecsRedirectWriteEventArgs e) 
{ 
   byte[] byteBuffer = new byte[e.Count]; 
   Marshal.Copy(e.Buffer, byteBuffer, 0, e.Count); 
   myStream.Write(byteBuffer, 0, e.Count); 
   e.Written = e.Count; 
 
   Debug.WriteLine("The number of bytes that write request should copy from the buffer is : {0}", e.Count); 
   Debug.WriteLine("The actual number of bytes that this write request has copied from Buffer is : {0}", e.Written); 
} 
 
// Redirect Close event example 
private void Codecs_Close(object sender, CodecsRedirectCloseEventArgs e) 
{ 
   myStream.Close(); 
} 
 
 
public void StartRedirectingExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   codecs.RedirectOpen += new EventHandler<CodecsRedirectOpenEventArgs>(Codecs_Open); 
   codecs.RedirectSeek += new EventHandler<CodecsRedirectSeekEventArgs>(Codecs_Seek); 
   codecs.RedirectRead += new EventHandler<CodecsRedirectReadEventArgs>(Codecs_Read); 
   codecs.RedirectWrite += new EventHandler<CodecsRedirectWriteEventArgs>(Codecs_Write); 
   codecs.RedirectClose += new EventHandler<CodecsRedirectCloseEventArgs>(Codecs_Close); 
 
   string srcFilename = Path.Combine(LEAD_VARS.ImagesDir, "test_image1.cmp"); 
 
   codecs.StartRedirecting(); 
   RasterImage image = codecs.Load(srcFilename); 
   myStream.Close(); 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Image1_redirect.jpg"), RasterImageFormat.Jpeg, image.BitsPerPixel); 
   codecs.StopRedirecting(); 
 
   // Clean up 
   myStream.Dispose(); 
   image.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

CodecsRedirectOpenEventArgs Members

Leadtools.Codecs Namespace

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Help Version 22.0.2023.5.5

Leadtools.Codecs Assembly

Introduction

Getting Started

Namespaces

Leadtools.Codecs Namespace

Assemblies