`IImage` represents a base interface for raster and vector images. `IBitmap` now implements this interface and `DrawingContext` accepts this interface in `DrawImage`.
The interface defines a `Draw` method which introduces a level of indirection for drawing the image through the image itself.
Renamed `IDrawingContextImpl.DrawImage` to `DrawBitmap` as this only handles drawing bitmap images. `Bitmap` now calls this method directly on the platform implementation.
We're potentially creating a new immutable version of the opacity mask each time the `VisualNode` is updated. Need to implement comparison between mutable and immutable brushes.
Previously we were creating a new render layer for all controls with `Opacity != 1`. This was causing the `Calendar` page in ControlCatalog to render _really_ slowly. Instead, only create a new render layer when `Opacity` is being animated.
Also don't even render controls where `Opacity == 0`.
`VisualBrush`es need to get delegated back to the renderer for
rendering, so added an `IVisualBrushRenderer` interface which is
implemented by the renderers, and pass this when creating drawing
contexts. Only currently implemented/tested for D2D and
`ImmediateRenderer`.
Layers are now calculated by SceneBuilder and stored in Scene. This
means we are no longer accessing `visual.Opacity` from the render thread
(and `VerifyAccess` calls have been placed in AvaloniaObject.GetValue
and friends to ensure this cannot happen). ControlCatalog is now
rendering mostly fine.
Giuseppe Lippolis
Steven Kirk
Nikita Tsukanov
Benedikt Schroeder
Dariusz Komosinski
Jeremy Koritzinsky
Steven Kirk
Steven Kirk