Offset Property

Summary

Gets the offset in bytes from the beginning of the file at which the image data begins.

Syntax

C++/CLI

Python

public long Offset { get; }

public: 
property int64 Offset { 
   int64 get(); 
}

Offset # get and  (CodecsLoadImageEventArgs)

Property Value

The offset in bytes to the start of the image data. The default value is 0.

Remarks

This is only valid if OffsetValid is true.

This is the same value passed to the Load methods that takes a offset parameter

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
private void Codecs_LoadImage(object sender, CodecsLoadImageEventArgs e) 
{ 
   e.Cancel = true; 
 
   // get all properties for the CodecsLoadImageEventArgs class. 
   Debug.WriteLine("File name is: {0}", e.FileName); 
   Debug.WriteLine("The Image width and height is: {0},{1}", e.Image.Width, e.Image.Height); 
   Debug.WriteLine("The Length of the buffer is: {0}", e.Buffer.Length); 
   Debug.WriteLine("The current row in the first line of the buffer is: {0}", e.Row); 
   Debug.WriteLine("The number of lines in the buffer is: {0}", e.Lines); 
 
   if (e.OffsetValid) 
   { 
      Debug.WriteLine("Offset count is : {0}", e.OffsetCount); 
      Debug.WriteLine("Offset value is : {0}", e.Offset); 
   } 
 
   if (e.TileValid) 
   { 
      LeadRect rect = e.Tile; 
      Debug.WriteLine("Tile Dimension ({0},{1},{2},{3)}", rect.X, rect.Y, rect.Width, rect.Height); 
   } 
 
   Debug.WriteLine("Image p number: {0}", e.ImagePage); 
   Debug.WriteLine("First page number: {0}", e.FirstPage); 
   Debug.WriteLine("Current page number: {0}", e.Page); 
   Debug.WriteLine("Last page number: {0}", e.LastPage); 
   Debug.WriteLine("Page percent: {0}%", e.PagePercent); 
   Debug.WriteLine("Total percent: {0}%", e.TotalPercent); 
   Debug.WriteLine("Flags = {0}", e.Flags); 
 
   System.IO.Stream loadStream = e.Stream; 
   CodecsImageInfo info = e.Info; 
   e.Cancel = false; 
} 
 
 
public void LoadImageExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   codecs.LoadImage += new EventHandler<CodecsLoadImageEventArgs>(Codecs_LoadImage); 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")); 
   codecs.LoadImage -= new EventHandler<CodecsLoadImageEventArgs>(Codecs_LoadImage); 
 
   // Clean up 
   codecs.Dispose(); 
   image.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.*; 
import java.net.*; 
import java.nio.file.Paths; 
import java.util.*; 
import java.time.Instant; 
import java.time.Duration; 
 
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.codecs.RasterCodecs.FeedCallbackThunk; 
import leadtools.drawing.internal.*; 
import leadtools.imageprocessing.*; 
import leadtools.imageprocessing.color.ChangeIntensityCommand; 
import leadtools.svg.*; 
 
 
CodecsLoadImageListener codecsLoadImage = new CodecsLoadImageListener() { 
 
   @Override 
   public void onLoadImage(CodecsLoadImageEvent e) { 
      e.setCancel(true); 
 
      // get all properties for the CodecsLoadImageEventArgs class. 
      System.out.println("File name is: " + e.getFileName()); 
      System.out 
            .println("The Image width and height is: " + e.getImage().getWidth() + "," + e.getImage().getHeight()); 
      System.out.println("The Length of the buffer is: " + e.getBuffer().getLength()); 
      System.out.println("The current row in the first line of the buffer is: " + e.getRow()); 
      System.out.println("The number of lines in the buffer is: " + e.getLines()); 
 
      if (e.getTileValid()) { 
         LeadRect rect = e.getTile(); 
         System.out.println("Tile Dimension (" + rect.getX() + "," + rect.getY() + "," + rect.getWidth() + "," 
               + rect.getHeight() + ")"); 
      } 
 
      System.out.println("Image p number: " + e.getImagePage()); 
      System.out.println("First page number: " + e.getFirstPage()); 
      System.out.println("Current page number: " + e.getPage()); 
      System.out.println("Last page number: " + e.getLastPage()); 
      System.out.println("Page percent: " + e.getPagePercent()); 
      System.out.println("Total percent: " + e.getTotalPercent()); 
      System.out.println("Flags = " + e.getFlags()); 
 
      e.getStream(); 
      e.getInfo(); 
      e.setCancel(false); 
   } 
}; 
 
public void loadImageExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.addLoadImageListener(codecsLoadImage); 
   RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp")); 
   codecs.removeLoadImageListener(codecsLoadImage); 
 
   // Clean up 
   codecs.dispose(); 
   image.dispose(); 
}

Requirements

Target Platforms

Reference

CodecsLoadImageEventArgs Class

CodecsLoadImageEventArgs Members

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Help Version 23.0.2024.2.29

Leadtools.Codecs Assembly

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