Why ICanvas.Scale() does not scale?

[mgierlasinski]

Hi,

I see that general concept of scaling is to store scale factor in canvas state (and in ScalingScanvas) and later use it for drawing calculations. With that approach some native implementations looks a little bit odd.

For example NativeConcatenateTransform - if NativeCanvas is wrapped by ScalingCanvas, scale from AfflineTransform must be cut off before doing native Matrix concatenation so the scale is not applied 2 times - first with transform itself and then by drawing code like FillRectangle. But if you don't use ScalingCanvas, NativeConcatenateTransform will not scale canvas at all.

Why ICanvas.Scale() doesn't just call Scale() on native ICanvas implementation?