Struct FilterBoundary 

pub struct FilterBoundary {
    pub order: DrawOrder,
    pub bounds: Bounds<ScaledPixels>,
    pub content_mask: ContentMask<ScaledPixels>,
    pub corner_radii: Corners<ScaledPixels>,
    pub corner_smoothing: f32,
    pub filters: SmallVec<[ScaledFilter; 4]>,
    pub opacity: f32,
    pub is_start: bool,
}

The start or end marker of a content-filter or opacity isolation group.

The primitives between a matched pair are drawn into an offscreen target, filtered as one layer, and composited back into bounds. Deeper groups allocate additional isolation targets.

Produced by crate::Window::with_filter_layer, which inserts a start marker, paints its contents, and inserts the end marker.

Fields

order: DrawOrder

The draw order. Scene::insert_primitive assigns it.

bounds: Bounds<ScaledPixels>

The rectangle that the filtered group is composited into, in scaled pixels.

content_mask: ContentMask<ScaledPixels>

The region that clips this group.

corner_radii: Corners<ScaledPixels>

The corner radii of FilterBoundary::bounds, in scaled pixels.

corner_smoothing: f32

How smooth the corners are, from 0.0 for circular arcs to 1.0.

filters: SmallVec<[ScaledFilter; 4]>

The filter chain applied to the isolated group, in scene (device-pixel) space. Identity filters are dropped at paint time. An empty chain represents an opacity-only group. Inline capacity 4 (same struct size as 1 here — see BackdropFilter::filters).

opacity: f32

Opacity applied once when compositing the completed group into its parent.

is_start: bool

true for the start marker, which opens the group. false for the end marker, which closes it.

Implementations

impl FilterBoundary

pub fn max_blur_radius(&self) -> f32

Returns the largest Gaussian blur radius in this filter chain, in device pixels.

Trait Implementations

impl Clone for FilterBoundary

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FilterBoundary

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<FilterBoundary> for Primitive

fn from(boundary: FilterBoundary) -> Self

Converts to this type from the input type.