''' <summary>
''' Draws an image, overlayed with path, using color blending on specified drawing engine.
''' </summary>
''' <param name="drawingEngine">Drawing engine.</param>
''' <param name="area">Area to draw objects in.</param>
Public Shared Sub ColorBlendingExample(drawingEngine As DrawingEngine, area As RectangleF)
    ' create graphics path
    Using path As IGraphicsPath = drawingEngine.DrawingFactory.CreateGraphicsPath()
        Dim pathPoints As PointF() = New PointF() {New PointF(area.X, area.Y + area.Height * 0.6F), New PointF(area.X + area.Width * 0.6F, area.Y), New PointF(area.X + area.Width, area.Y + area.Height * 0.8F)}

        ' add path elements
        path.AddLines(pathPoints)
        path.CloseFigure()

        ' path to image file for drawing
        ' this image is located in <install path>/VintaSoft/Imaging .NET/Images/
        Dim imagePath As String = "AutoContrast.jpg"

        ' set image destination rectangle
        Dim imageRect As New RectangleF(area.X + area.Width * 0.2F, area.Y + area.Height * 0.2F, area.Width * 0.6F, area.Height * 0.6F)
        ' create VintaSoft image and draw it
        Using image As New VintasoftImage(imagePath)
            drawingEngine.DrawImage(image, imageRect)
        End Using

        Dim drawingSurface As DrawingSurface = Nothing
        ' if drawing engine is raster engine
        If TypeOf drawingEngine Is RasterDrawingEngine Then
            ' get drawing surface from canvas
            drawingSurface = New ImageDrawingSurface(DirectCast(drawingEngine, RasterDrawingEngine).Canvas)
        End If

        ' if drawing surface created
        If drawingSurface IsNot Nothing Then
            ' create path blending
            Using blending As New GraphicsPathColorBlending(path, BlendingMode.Difference, Color.White)
                ' execute blending
                drawingEngine.BlendPath(drawingSurface, blending)
            End Using
        End If
    End Using
End Sub

/// <summary>
/// Draws an image, overlayed with path, using color blending on specified drawing engine.
/// </summary>
/// <param name="drawingEngine">Drawing engine.</param>
/// <param name="area">Area to draw objects in.</param>
public static void ColorBlendingExample(DrawingEngine drawingEngine, RectangleF area)
{
    // create graphics path
    using (IGraphicsPath path = drawingEngine.DrawingFactory.CreateGraphicsPath())
    {
        PointF[] pathPoints = new PointF[]
        {
            new PointF(area.X, area.Y + area.Height * 0.6f),
            new PointF(area.X + area.Width * 0.6f, area.Y),
            new PointF(area.X + area.Width, area.Y + area.Height * 0.8f),
        };

        // add path elements
        path.AddLines(pathPoints);
        path.CloseFigure();

        // path to image file for drawing
        // this image is located in <install path>/VintaSoft/Imaging .NET/Images/
        string imagePath = "AutoContrast.jpg";

        // set image destination rectangle
        RectangleF imageRect = new RectangleF(area.X + area.Width * 0.2f, area.Y + area.Height * 0.2f, area.Width * 0.6f, area.Height * 0.6f);
        // create VintaSoft image and draw it
        using (VintasoftImage image = new VintasoftImage(imagePath))
            drawingEngine.DrawImage(image, imageRect);

        DrawingSurface drawingSurface = null;
        // if drawing engine is raster engine
        if (drawingEngine is RasterDrawingEngine)
        {
            // get drawing surface from canvas
            drawingSurface = new ImageDrawingSurface(((RasterDrawingEngine)drawingEngine).Canvas);
        }

        // if drawing surface created
        if (drawingSurface != null)
        {
            // create path blending
            using (GraphicsPathColorBlending blending = new GraphicsPathColorBlending(path, BlendingMode.Difference, Color.White))
            {
                // execute blending
                drawingEngine.BlendPath(drawingSurface, blending);
            }
        }
    }
}