UWP 구성 API : 둥근 모서리?

Question

Composition API를 사용하여 콘텐츠의 둥근 모서리를 만드는 방법을 찾는 데 어려움을 겪고 있습니다. 이것이 제가있는 곳입니다. 어떤 도움을 주시면 감사하겠습니다.

void CreateRoundedCorners(Vector2 cornerRadius, CompositionSurfaceBrush imageSourceBrush, SpriteVisual targetVisual)
{
    CompositionRoundedRectangleGeometry roundedRectangle = _compositor.CreateRoundedRectangleGeometry();
    roundedRectangle.Size = new Vector2(;
    roundedRectangle.CornerRadius = cornerRadius;

    CompositionSpriteShape spriteShape = _compositor.CreateSpriteShape(roundedRectangle);
    spriteShape.FillBrush = _compositor.CreateColorBrush(Colors.Black);
    spriteShape.CenterPoint = new Vector2(_imageSize.X / 2, _imageSize.Y / 2);

    ShapeVisual spriteShapeVisual = _compositor.CreateShapeVisual();
    spriteShapeVisual.Size = _imageSize;
    spriteShapeVisual.Shapes.Add(spriteShape);

    CompositionMaskBrush maskBrush = _compositor.CreateMaskBrush();
    maskBrush.Source = imageSourceBrush;
    maskBrush.Mask = null; // How do I get the rectangle shape in here?

    targetVisual.Brush = maskBrush;
}

Answer 1

해결책을 찾았습니다. CompositionVisualSurface를 만들고, ShapeVisual을 추가하고, 여기에서 Mask 소스로 사용할 CompositionSurfaceBrush를 만듭니다.

void CreateRoundedCorners(Vector2 cornerRadius, CompositionBrush imageSourceBrush, SpriteVisual targetVisual)
{
    CompositionRoundedRectangleGeometry roundedRectangle =_compositor.CreateRoundedRectangleGeometry();
    roundedRectangle.Size = _imageSize;
    roundedRectangle.CornerRadius = cornerRadius;

    CompositionSpriteShape spriteShape = _compositor.CreateSpriteShape(roundedRectangle);
    spriteShape.FillBrush = _compositor.CreateColorBrush(Colors.Black);
    spriteShape.CenterPoint = new Vector2(_imageSize.X / 2, _imageSize.Y / 2);

    ShapeVisual spriteShapeVisual = _compositor.CreateShapeVisual();
    spriteShapeVisual.BorderMode = CompositionBorderMode.Soft;
    spriteShapeVisual.Size = _imageSize;
    spriteShapeVisual.Shapes.Add(spriteShape);

    CompositionVisualSurface surface = _compositor.CreateVisualSurface();
    surface.SourceSize = _imageSize;
    surface.SourceVisual = spriteShapeVisual;

    CompositionMaskBrush maskBrush = _compositor.CreateMaskBrush();
    maskBrush.Source = imageSourceBrush;
    maskBrush.Mask = _compositor.CreateSurfaceBrush(surface);

    targetVisual.Brush = maskBrush;
}

편집 : 마스크는 셰이프에서도 얻을 수 있지만 이미 시각적 트리에있는 경우에만 가능합니다.

Windows.UI.Xaml.Shapes.Shape rect = new Rectangle();
CompositionBrush mask = rect.GetAlphaMask();

Answer 2

UWP 구성 API : 둥근 모서리?

요구 사항에 따라 SetElementChildVisual방법을 사용 CompositionRoundedRectangleGeometry하여 현재 페이지 에을 추가 할 수 있습니다 .

예를 들면 :

private void Page_Loaded(object sender, RoutedEventArgs e)
{
    var visual = ElementCompositionPreview.GetElementVisual(this);
    var compositor = visual.Compositor;
  
    CompositionRoundedRectangleGeometry roundedRectangle = compositor.CreateRoundedRectangleGeometry();
    roundedRectangle.Size = new Vector2(200, 200);
    roundedRectangle.CornerRadius = new Vector2(30,30);

    CompositionSpriteShape spriteShape = compositor.CreateSpriteShape(roundedRectangle);
    spriteShape.FillBrush = compositor.CreateColorBrush(Colors.Blue);
    spriteShape.CenterPoint = new Vector2(100, 100);

    ShapeVisual spriteShapeVisual = compositor.CreateShapeVisual();
    spriteShapeVisual.Size = new Vector2(200, 200); 
    
    spriteShapeVisual.Shapes.Clear();
    spriteShapeVisual.Shapes.Add(spriteShape);
  
    ElementCompositionPreview.SetElementChildVisual(this, spriteShapeVisual);
}