WPF render performance with BitmapSource

Question

I\'ve created a WPF control (inheriting from FrameworkElement) that displays a tiled graphic that can be panned. Each tile is 256x256 pixels at 24bpp. I\'ve overridden OnRender.

Answer 1

Also try these;

/* ivis is declared in XAML  */

iVis.Stretch = Stretch.None;
RenderOptions.SetBitmapScalingMode(iVis, BitmapScalingMode.NearestNeighbor);
RenderOptions.SetEdgeMode(iVis, EdgeMode.Aliased);
VisualBitmapScalingMode = BitmapScalingMode.NearestNeighbor;
iVis.Source = **** your bitmap source ****

I was having some trouble with performance when using a huge amount of "A" channel color's, waiting until after the image had rendered to scale it worked much better for me.

Also, as you said your using a tiled graphic?

You would usually use a TileBrush to simply set as the Brush on your FrameworkElement. If you are animating them or adding new ones dynamically, you could generate your brushes then apply them to your object as you go manually too, be sure to Freeze them if you can. Also, VisualBitmapScalingMode is a property of any Visual.