GetRegionClipSegments Method

RasterImageExamples.prototype.GetRegionClipSegmentsExample = function()
{
   Tools.SetLicense ( ) ;
   with ( Leadtools ) { 
      with ( Leadtools.Codecs ) {
         var codecs = new RasterCodecs();

         var srcFileName = "Assets\\Image1.cmp";
         var destFileName = "Image1_GetRegionClipSegments1.bmp";
         var image = null;

         // Load the image
         return Tools.AppInstallFolder().getFileAsync(srcFileName).then ( function ( loadFile ) {
            return codecs.loadAsync(LeadStreamFactory.create(loadFile));})
         .then ( function (img) {
            image = img;
            // Add a region to the image
            var rc = LeadRectHelper.create(image.width / 3, image.height / 3, image.width / 3, image.height / 3);
            image.addEllipseToRegion(null, rc, RasterRegionCombineMode.set);

            // Set the pixels inside the region to black

            // Get the maximum number of elements in a row,
            // so we know how big the array of segments should be
            var maxClipSegments = image.calculateRegionMaximumClipSegments();

            // Get the region bounds, so we know which is the first row
            var rgnBounds = image.getRegionBounds(null);

            // Allocate an array large enough to store the maximum number of segments.
            var segmentBuffer = new Array(maxClipSegments);

            // Loop through the region rows
            for (var y = rgnBounds.y; y < rgnBounds.height + rgnBounds.y; y++)
            {
               // Get the segments for the row
               image.getRegionClipSegments(y, segmentBuffer, 0);

               // Do something with the pixels
               for (var i = 0; i < maxClipSegments / 2; i++)
               {
                  for (var j = segmentBuffer[i]; j < segmentBuffer[i + 1]; j++)
                  {
                     var clr = image.getPixelColor(y, j);
                     clr = RasterColorHelper.create(clr.r / 2, clr.g / 2, clr.b / 2);
                     image.setPixelColor(y, j, clr);
                  }
               }
            }

            // Save the image back to file
            return Tools.AppLocalFolder().createFileAsync(destFileName);})
         .then ( function ( saveFile)  {
            var saveStream = LeadStreamFactory.create(saveFile);
            return codecs.saveAsync(image, saveStream, RasterImageFormat.bmp, 24); })
         .then ( function ( ) {

            image.close();
            codecs.close();
         })
      }
   }
}