Struct LayerVisual 

pub struct LayerVisual(/* private fields */);

A container visual whose children are composed into one offscreen layer, which is then drawn with the opacity of the visual and its shadow (WinUI Microsoft.UI.Composition.LayerVisual).

The shadow of a layer visual follows the alpha of the composed children where the drawing context can draw a drop shadow of a layer (the Skia and Vello backends); elsewhere it is the box shadow of the rectangle of the visual, as the shadow of a sprite visual.

The effect (an effect brush) is applied to the composed children: they are the first source parameter of its graph, and the rest of the graph is drawn around them (a blur pushes the blur effect of the drawing context around the layer, a composite draws its other sources under and over it).

Like a sprite visual, a layer visual does not clip to its bounds when it is created (clip_to_bounds is false).

Implementations

impl LayerVisual

pub fn from_visual(visual: &Rc<CompositionVisual>) -> Option<LayerVisual>

The handle of visual as a layer visual, if it is one.

pub fn visual(&self) -> &Rc<CompositionVisual>

The visual as a composition visual.

pub fn shadow(&self) -> Option<Rc<DropShadow>>

The shadow of the composed layer.

pub fn set_shadow(&self, value: Option<Rc<DropShadow>>)

pub fn effect(&self) -> Option<CompositionEffectBrush>

Effect: the effect brush applied to the composed children, which are the first source parameter of its graph. (The upstream effect of every visual, an image effect, is visual().effect().)

pub fn set_effect(&self, value: Option<CompositionEffectBrush>)

Trait Implementations

impl Clone for LayerVisual

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Deref for LayerVisual

type Target = Rc<CompositionVisual>

The resulting type after dereferencing.

fn deref(&self) -> &Rc<CompositionVisual>

Dereferences the value.