App2 Field

Summary

Constant which represents the APP2 marker.

Syntax

Objective-C

C++/CLI

Java

Python

public static readonly int App2

extern const NSInteger LTRasterMarkerMetadataApp2

public transient static final int APP2

public: 
static readonly int App2

App2 (RasterMarkerMetadata)

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
 
 
public void RasterMarkerMetadataExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_markers.tif"); 
 
   // Load the image 
   RasterImage image = codecs.Load(srcFileName); 
   codecs.Save(image, destFileName, RasterImageFormat.ExifJpeg, 24); 
 
   image.Dispose(); 
 
   // write a marker to the file 
   RasterMarkerMetadata markerWrite = new RasterMarkerMetadata(); 
   byte[] data = new byte[100]; 
   for (int i = 0; i < data.Length; i++) 
      data[i] = (byte)(i + 1); 
   markerWrite.Id = RasterMarkerMetadata.App2; 
   markerWrite.SetData(data); 
 
   Console.WriteLine("Writing the marker"); 
   codecs.WriteMarker(destFileName, 1, markerWrite); 
 
   // read the markers from the file and check for ours 
   IList<RasterMarkerMetadata> markers = codecs.ReadMarkers(destFileName); 
   RasterMarkerMetadata markerRead = null; 
   for (int i = 0; i < markers.Count && markerRead == null; i++) 
   { 
      if (markers[i].Id == markerWrite.Id) 
         markerRead = markers[i]; 
   } 
 
   Assert.IsTrue(markerRead.Id == markerWrite.Id); 
   byte[] dataRead = markerRead.GetData(); 
   byte[] dataWrite = markerWrite.GetData(); 
   Assert.IsTrue(dataRead.Length == dataWrite.Length); 
   for (int i = 0; i < dataRead.Length; i++) 
      Assert.IsTrue(dataRead[i] == dataWrite[i]); 
 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
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.*; 
 
 
public void rasterMarkerMetadataExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.setThrowExceptionsOnInvalidImages(true); 
 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
   String destFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1_markers.tif"); 
   ILeadStream leadStream = LeadStreamFactory.create(destFileName); 
 
   // Load the image 
   RasterImage image = codecs.load(srcFileName); 
   codecs.save(image, destFileName, RasterImageFormat.EXIF_JPEG, 24); 
 
   image.dispose(); 
 
   // write a marker to the file 
   RasterMarkerMetadata markerWrite = new RasterMarkerMetadata(); 
   byte[] data = new byte[100]; 
   for (int i = 0; i < data.length; i++) 
      data[i] = (byte) (i + 1); 
   markerWrite.setId(RasterMarkerMetadata.APP2); 
   markerWrite.setData(data); 
 
   System.out.println("Writing the marker"); 
   codecs.writeMarker(leadStream, 1, markerWrite); 
 
   // read the markers from the file and check for ours 
   RasterCollection<RasterMarkerMetadata> markers = codecs.readMarkers(leadStream); 
   RasterMarkerMetadata markerRead = null; 
   for (int i = 0; i < markers.size() && markerRead == null; i++) { 
      if (markers.get(i).getId() == markerWrite.getId()) 
         markerRead = markers.get(i); 
   } 
 
   assertTrue(markerRead.getId() == markerWrite.getId()); 
   byte[] dataRead = markerRead.getData(); 
   byte[] dataWrite = markerWrite.getData(); 
   assertTrue(dataRead.length == dataWrite.length); 
   for (int i = 0; i < dataRead.length; i++) { 
      assertTrue(dataRead[i] == dataWrite[i]); 
   } 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

RasterMarkerMetadata Class

RasterMarkerMetadata Members

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Help Version 23.0.2024.5.22

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