UnPremultiplyEffectInvalidateSourceRectangle Method |
Namespace: Microsoft.Graphics.Canvas.Effects
public void InvalidateSourceRectangle( ICanvasResourceCreatorWithDpi resourceCreator, uint sourceIndex, Rect invalidRectangle )
When CacheOutput is enabled, this method can be used to invalidate the cache.
It is also used to populate a list of invalid regions which are propagated through the effect graph, mapped from source to output coordinate systems, and can then be queried by GetInvalidRectangles(ICanvasResourceCreatorWithDpi).