StopOverlay Method

Summary

Restores the previous overlay callback.

Syntax

Objective-C

C++/CLI

Java

Python

public void StopOverlay()

- (void)stopOverlay

public void stopOverlay()

public: 
void StopOverlay();

def StopOverlay(self):

Remarks

Call this method to restore the old overlay handling prior to calling StartOverlay

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
void PtokaOverlayExample(string ptokaFileName, string ptokaFilesPath) 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Set up the private variables used in the callback 
   myCodecs = codecs; 
   myPtokaFilesPath = ptokaFilesPath; 
 
   // Set the overlay callback 
   codecs.StartOverlay(CodecsOverlayCallback, CodecsOverlayCallbackMode.CallLoad); 
 
   // Load the PTOKA file 
   RasterImage image = codecs.Load(ptokaFileName); 
 
   // Stop the overlay by resetting the old callback. 
   codecs.StopOverlay(); 
 
   // Save the image as TIFF 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "PtokaOverlay.tif"); 
   codecs.Save(image, destFileName, RasterImageFormat.Tif, 1); 
   image.Dispose(); 
 
   // Clean up 
   codecs.Dispose(); 
} 
 
RasterCodecs myCodecs; 
string myPtokaFilesPath; 
 
void CodecsOverlayCallback(CodecsOverlayData data) 
{ 
   // Show overlay information 
   Debug.WriteLine("File: {0}", data.FileName); 
   Debug.WriteLine("Page Number: {0}", data.PageNumber); 
   Debug.WriteLine("Info: {0}", data.Info); 
 
   // Construct the overlay file name 
   string overlayFileName = Path.Combine(myPtokaFilesPath, data.FileName); 
 
   if (data.Info) 
   { 
      // Info, we only need to fill in the .InfoXXX members of the data 
      CodecsImageInfo imageInfo = myCodecs.GetInformation(overlayFileName, false); 
      data.InfoWidth = imageInfo.Width; 
      data.InfoHeight = imageInfo.Height; 
      data.InfoXResolution = imageInfo.XResolution; 
      data.InfoYResolution = imageInfo.YResolution; 
   } 
   else 
   { 
      // We need to load the overlay image into the .Image member 
      data.Image = myCodecs.Load(overlayFileName); 
   } 
} 
 
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.*; 
 
 
public void ptokaOverlayExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String ptokaFileName = combine(LEAD_VARS_IMAGES_DIR, "jbig.jbg"); 
   RasterCodecs codecs = new RasterCodecs(); 
 
   // Set up the private variables used in the callback 
   myCodecs = codecs; 
   myPtokaFilesPath = LEAD_VARS_IMAGES_DIR; 
 
   // Set the overlay callback 
   codecs.startOverlay(codecsOverlayCallback, CodecsOverlayCallbackMode.CALL_LOAD); 
 
   // Load the PTOKA file 
   RasterImage image = codecs.load(ptokaFileName); 
 
   // Stop the overlay by resetting the old callback. 
   codecs.stopOverlay(); 
 
   // Save the image as TIFF 
   String destFileName = combine(LEAD_VARS_IMAGES_DIR, "PtokaOverlay.tif"); 
   codecs.save(image, destFileName, RasterImageFormat.TIF, 1); 
   image.dispose(); 
 
   // Clean up 
   codecs.dispose(); 
} 
 
RasterCodecs myCodecs; 
String myPtokaFilesPath; 
CodecsOverlayListener codecsOverlayCallback = new CodecsOverlayListener() { 
 
   @Override 
   public void onOverlay(CodecsOverlayData data) { 
      // Show overlay information 
      System.out.println("File: " + data.getFileName()); 
      System.out.println("Page Number: " + data.getPageNumber()); 
      System.out.println("Info: " + data.getInfo()); 
 
      // Construct the overlay file name 
      String overlayFileName = combine(myPtokaFilesPath, data.getFileName()); 
 
      if (data.getInfo()) { 
         // Info, we only need to fill in the .InfoXXX members of the data 
         CodecsImageInfo imageInfo = myCodecs.getInformation(overlayFileName, false); 
         data.setInfoWidth(imageInfo.getWidth()); 
         data.setInfoHeight(imageInfo.getHeight()); 
         data.setInfoXResolution(imageInfo.getXResolution()); 
         data.setInfoYResolution(imageInfo.getYResolution()); 
      } else { 
         // We need to load the overlay image into the .Image member 
         data.setImage(myCodecs.load(overlayFileName)); 
      } 
   } 
 
};

Requirements

Target Platforms

Reference

RasterCodecs Class

RasterCodecs Members

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Help Version 23.0.2024.2.29

Leadtools.Codecs Assembly

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Leadtools.Codecs Namespace

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