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Rendering bitmap is Blurry in WPF


New Member

I am trying to convert some vector based objects into a raster bitmap.
I manage to do that, but the result is blurry, meaning, edges are blurry instead of jagged.
I assume an anti-aliasing algorithm is applied, but I do not want to be applied...

here is my simplified code in which I draw a circle and make a raster out of it to an Image Control:

DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawEllipse(Brushes.Red, new Pen(Brushes.Red, 1), new Point(50, 50), 50, 50);

RenderTargetBitmap bmp = new RenderTargetBitmap(180, 180, 96, 96, PixelFormats.Pbgra32);

RenderOptions.SetEdgeMode(_image, EdgeMode.Aliased);
_image.Source = bmp;
Here is an image to make it clearer.
What I want is the jagged edged circle...
ImageShack - Image Hosting :: 98299814ew8.png

Does anyone have any idea why this happens???

My Computer