Offset Property (original) (raw)
Summary
Gets or sets the byte offset relative to Origin.
Syntax
public long Offset { get; set; } public long getOffset()
public void setOffset(long value)
public:
property int64 Offset {
int64 get();
void set ( int64 );
}
Property Value
The byte offset relative to Origin this seek operation should move. After the seek operation is done. This property should updated with the new offset value. The default value is 0.
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";
}
Leadtools.Codecs Assembly
CompactFile(Stream,Stream,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(Stream,Stream,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method
CompactFile(string,string,int,int,bool,int,int,bool,int,CodecsSavePageMode,bool,bool) Method
CompactFile(string,string,int,int,bool,long,int,bool,long,CodecsSavePageMode,bool,bool,bool) Method