Public Class ImageRenderingTaskExample
    ' Gets the specified rectangle of image in specified scale.
    Public Shared Function GetScaledImageRect(image As Vintasoft.Imaging.VintasoftImage, rect As System.Drawing.Rectangle, scale As Single) As Vintasoft.Imaging.VintasoftImage
        ' create image renderer
        Using renderer As New Vintasoft.Imaging.ImageRendering.ImageRenderer(image)
            ' create rendering task
            Dim task As Vintasoft.Imaging.ImageRendering.ImageRenderingTask = Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateImageRegion(rect, scale)
            ' execute rendering
            Return renderer.ExecuteRendering(task)
        End Using
    End Function

    ' Gets an Jpeg2000 image using progressive decoding.
    Public Shared Function GetJpeg2000ImageUsingProgressiveLoading(jp2Filename As String) As Vintasoft.Imaging.VintasoftImage
        ' create image
        Using image As New Vintasoft.Imaging.VintasoftImage(jp2Filename)
            ' create image renderer
            Using renderer As New Vintasoft.Imaging.ImageRendering.ImageRenderer(image)
                ' create rendering task
                Dim task As Vintasoft.Imaging.ImageRendering.ImageRenderingTask = Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateScaledImage(1)

                ' set settings of rendering task
                task.DestImagePixelFormat = Vintasoft.Imaging.PixelFormat.Bgra32
                task.RenderingQuality = Vintasoft.Imaging.ImageRenderingQuality.High
                task.NeedGenerateIntermediateImage = True
                task.IsProgressiveDecodingEnabled = True
                task.ProgressiveDecodingMode = Vintasoft.Imaging.ImageRendering.ProgressiveDecodingMode.Replacement
                task.ProgressiveDecodingRenderingQuality = Vintasoft.Imaging.ImageRenderingQuality.High
                task.ProgressiveDecodingDepth = 2
                task.ProgressiveDecodingScaleFactor = 6
                task.MaxThreads = 2
                task.DecodingSteps = task.MaxThreads * 8

                ' use IntermediateImageReady event: image part or progressive layer is loaded
                AddHandler task.IntermediateImageReady, New System.EventHandler(Of Vintasoft.Imaging.ImageRendering.IntermediateImageReadyEventArgs)(AddressOf task_IntermediateImageReady)

                ' execute rendering
                Return renderer.ExecuteRendering(task)
            End Using
        End Using
    End Function

    ' Image part or progressive layer is loaded:
    ' show the e.ChangedRect rectangle of the e.Image on your viewer.
    Private Shared Sub task_IntermediateImageReady(sender As Object, e As Vintasoft.Imaging.ImageRendering.IntermediateImageReadyEventArgs)
        '...
    End Sub
End Class

public class ImageRenderingTaskExample
{
    // Gets the specified rectangle of image in specified scale.
    public static Vintasoft.Imaging.VintasoftImage GetScaledImageRect(
        Vintasoft.Imaging.VintasoftImage image, System.Drawing.Rectangle rect, float scale)
    {
        // create image renderer
        using (Vintasoft.Imaging.ImageRendering.ImageRenderer renderer =
            new Vintasoft.Imaging.ImageRendering.ImageRenderer(image))
        {
            // create rendering task
            Vintasoft.Imaging.ImageRendering.ImageRenderingTask task =
                Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateImageRegion(rect, scale);
            // execute rendering
            return renderer.ExecuteRendering(task);
        }
    }

    // Gets an Jpeg2000 image using progressive decoding.
    public static Vintasoft.Imaging.VintasoftImage GetJpeg2000ImageUsingProgressiveLoading(string jp2Filename)
    {
        // create image
        using (Vintasoft.Imaging.VintasoftImage image = new Vintasoft.Imaging.VintasoftImage(jp2Filename))
        // create image renderer
        using (Vintasoft.Imaging.ImageRendering.ImageRenderer renderer =
            new Vintasoft.Imaging.ImageRendering.ImageRenderer(image))
        {
            // create rendering task
            Vintasoft.Imaging.ImageRendering.ImageRenderingTask task =
                Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateScaledImage(1);

            // set settings of rendering task
            task.DestImagePixelFormat = Vintasoft.Imaging.PixelFormat.Bgra32;
            task.RenderingQuality = Vintasoft.Imaging.ImageRenderingQuality.High;
            task.NeedGenerateIntermediateImage = true;
            task.IsProgressiveDecodingEnabled = true;
            task.ProgressiveDecodingMode = Vintasoft.Imaging.ImageRendering.ProgressiveDecodingMode.Replacement;
            task.ProgressiveDecodingRenderingQuality = Vintasoft.Imaging.ImageRenderingQuality.High;
            task.ProgressiveDecodingDepth = 2;
            task.ProgressiveDecodingScaleFactor = 6;
            task.MaxThreads = 2;
            task.DecodingSteps = task.MaxThreads * 8;

            // use IntermediateImageReady event: image part or progressive layer is loaded
            task.IntermediateImageReady +=
                new System.EventHandler<Vintasoft.Imaging.ImageRendering.IntermediateImageReadyEventArgs>(task_IntermediateImageReady);

            // execute rendering
            return renderer.ExecuteRendering(task);
        }
    }

    // Image part or progressive layer is loaded:
    // show the e.ChangedRect rectangle of the e.Image on your viewer.
    private static void task_IntermediateImageReady(object sender, Vintasoft.Imaging.ImageRendering.IntermediateImageReadyEventArgs e)
    {
        //...
    }
}