private static void DrawMarqueeToolRectangular(this CanvasDrawingSession drawingSession, ICanvasResourceCreator resourceCreator, TransformerRect transformerRect, Rect sourceRectangle, MarqueeCompositeMode compositeMode = MarqueeCompositeMode.New)
{
switch (compositeMode)
{
case MarqueeCompositeMode.New:
{
drawingSession.Clear(Windows.UI.Colors.Transparent);
Rect rect = transformerRect.ToRect();
drawingSession.FillRectangle(rect, Windows.UI.Colors.DodgerBlue);
}
break;
case MarqueeCompositeMode.Add:
{
Rect rect = transformerRect.ToRect();
drawingSession.FillRectangle(rect, Windows.UI.Colors.DodgerBlue);
}
break;
case MarqueeCompositeMode.Subtract:
{
CanvasCommandList canvasCommandList = CanvasDrawingSessionExtensions.GetMarqueeToolRectangular(drawingSession, resourceCreator, transformerRect);
CanvasComposite canvasComposite = CanvasComposite.DestinationOut;
drawingSession.DrawImage(canvasCommandList, 0, 0, sourceRectangle, 1, CanvasImageInterpolation.Linear, canvasComposite);
}
break;
case MarqueeCompositeMode.Intersect:
{
CanvasCommandList canvasCommandList = CanvasDrawingSessionExtensions.GetMarqueeToolRectangular(drawingSession, resourceCreator, transformerRect);
CanvasComposite canvasComposite = CanvasComposite.DestinationIn;
drawingSession.DrawImage(canvasCommandList, 0, 0, sourceRectangle, 1, CanvasImageInterpolation.Linear, canvasComposite);
}
break;
case MarqueeCompositeMode.Xor:
{
CanvasCommandList canvasCommandList = CanvasDrawingSessionExtensions.GetMarqueeToolRectangular(drawingSession, resourceCreator, transformerRect);
CanvasComposite canvasComposite = CanvasComposite.Xor;
drawingSession.DrawImage(canvasCommandList, 0, 0, sourceRectangle, 1, CanvasImageInterpolation.Linear, canvasComposite);
}
break;
}
}
private static CanvasCommandList GetMarqueeToolRectangular(CanvasDrawingSession drawingSession, ICanvasResourceCreator resourceCreator, TransformerRect transformerRect)
{
CanvasCommandList canvasCommandList = new CanvasCommandList(resourceCreator);
using (CanvasDrawingSession ds = canvasCommandList.CreateDrawingSession())
{
Rect rect = transformerRect.ToRect();
ds.FillRectangle(rect, Windows.UI.Colors.DodgerBlue);
}
return(canvasCommandList);
}