public CanvasLayer(UGContext context, float alpha, UGRect clipRect) : this(context, 2)
{
_context.Native.PushOpacity(alpha);
var geometry = new RectangleGeometry(clipRect.ToWPFRect());
_context.Native.PushClip(geometry);
}
protected sealed override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
var matrix = PresentationSource.FromVisual(this).CompositionTarget.TransformToDevice;
var scale = (float)matrix.M11;
using (var ugContext = new UGContext(this, drawingContext, RenderSize, scale))
{
DrawOverride(ugContext);
}
}
private CanvasLayer(UGContext context, int count)
{
_context = context;
_count = count;
}
public CanvasLayer(UGContext context, UGRect clipRect) : this(context, 1)
{
var geometry = new RectangleGeometry(clipRect.ToWPFRect());
_context.Native.PushClip(geometry);
}
public CanvasLayer(UGContext context, float alpha) : this(context, 1)
{
_context.Native.PushOpacity(alpha);
}
public CanvasLayer(UGContext context) : this(context, 0)
{
}