Struct BackdropFilter 

pub struct BackdropFilter {
    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,
}

A filter applied to the content already painted behind bounds, composited into a rounded rectangle. A blur gives the frosted-glass effect.

Produced by crate::Window::paint_backdrop_filter. It is only emitted when its filter chain is not empty, since identity filters are dropped at paint time.

Fields

order: DrawOrder

The draw order. Scene::insert_primitive assigns it.

bounds: Bounds<ScaledPixels>

The rectangle that receives the filtered backdrop, in scaled pixels.

content_mask: ContentMask<ScaledPixels>

The region that clips this filter.

corner_radii: Corners<ScaledPixels>

The corner radii of BackdropFilter::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 backdrop, in scene (device-pixel) space. Identity filters are dropped at paint time, so a BackdropFilter is only emitted when this is non-empty.

Inline capacity is 4: a SmallVec<[ScaledFilter; 4]> is the same size as capacity 1 here (the heap repr already occupies that space), so chains up to 4 filters avoid allocating at no extra struct size.

opacity: f32

The element opacity, multiplied into the composited result.

Implementations

impl BackdropFilter

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 BackdropFilter

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 BackdropFilter

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

Formats the value using the given formatter.

impl Default for BackdropFilter

fn default() -> Self

Returns the “default value” for a type.

impl From<BackdropFilter> for Primitive

fn from(filter: BackdropFilter) -> Self

Converts to this type from the input type.