SaveImage Event

RasterCodecsExamples.prototype.SaveImageExample = function ( )
{
   Tools.SetLicense ( ) ;
   with ( Leadtools ) { with ( Leadtools.Codecs ) { 
      var codecs = new RasterCodecs();
      //required to fire events in JS
      Leadtools.RasterSupport.initialize();
      codecs.eventsDispatchMode = Leadtools.LeadEventsDispatchMode.useCoreDispatcher;

      var image ;
      var srcFileName = "Assets\\Image1.cmp";
      var destFileName = "Image1_SaveImage.cmp";

      // Load the source file (make sure to load as 24 bits/pixel)
      return Tools.AppInstallFolder().getFileAsync(srcFileName).then ( function ( loadFile ) {
         return codecs.loadAsync(LeadStreamFactory.create(loadFile), 24, CodecsLoadByteOrder.bgr, 1, 1)})
         .then ( function ( img ) {
            image = img ;

            // Instruct RasterCodecs to generate the saved scanlines data for us to manipulate
            codecs.options.save.retrieveDataFromImage = true;

            // Add a handler to the SaveImage event
            codecs.addEventListener ( "saveimage", codecs_SaveImage1);

            // Save the image
            return Tools.AppLocalFolder().createFileAsync(destFileName)}).then ( function ( saveFile ) {
               return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.cmp, 24)})
         .then ( function ( ) {
            codecs.removeEventListener ("saveimage", codecs_SaveImage1);

            image.close();
            // Clean up
            codecs.close();
         });
   }
   }
}


function codecs_SaveImage1(e) {
   // This example works with images saved as 24-bit per pixel only
   console.assert(e.image.bitsPerPixel == 24, "e.image.bitsPerPixel == 24");

   if (e.row == 0) {
      // Show information about the image being saved
      console.info("Saving an image with ", e.image.bitsPerPixel, " bpp.");
      console.info("Page: ", e.page, " of ", e.lastPage - e.firstPage + 1);
      console.info("Page percent: ", e.pagePercent, "%, Total percent: ", e.totalPercent, "%");
   }

   console.info("Row: ", e.row, ", Lines ", e.lines);

   // Get the scanlines from the image
   var scanlineLength = e.image.bytesPerLine;
   var scanline = new Array(scanlineLength);

   // Loop through all the scanlines in the data
   for (var y = 0; y < e.lines; y++) {
      // Get this row
      e.buffer.getData(y * scanlineLength, scanline, 0, scanlineLength);

      // We got the data, now double the intensity
      // Remember, this is 24-bits/pixel
      for (var x = 0; x < scanlineLength; x++) {
         scanline[x] *= 2;
      }

      // Copy it back to the event buffer
      e.buffer.setData(y * scanlineLength, scanline, 0, scanlineLength);
   }
}