Struct BackdropOp 

pub struct BackdropOp {
    pub filter: Arc<Filter>,
    pub clip: BezPath,
    pub bounds: Rect,
    pub source: Rect,
}

One backdrop-filter layer: blur what is behind it, inside clip.

Every geometry here is device space. The planner is fed by a backend that has already applied the layer transform, because the whole point of the occupancy test below is comparing regions from different parts of the tree against each other, and they are only comparable once flattened.

Fields

filter: Arc<Filter>

The filter graph to run over the backdrop.

clip: BezPath

The shape the filtered backdrop is drawn through.

bounds: Rect

Device-space bounding box of clip. What the result covers.

source: Rect

What the filter has to read to produce bounds.

Wider than bounds by the filter’s expansion, roughly 3 standard deviations for a gaussian: a blurred pixel at the edge of the panel samples from outside it. This, not bounds, is what the occupancy test uses, because a fill landing just outside the panel still changes the pixels inside it.

Trait Implementations

impl Clone for BackdropOp

fn clone(&self) -> BackdropOp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackdropOp

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

Formats the value using the given formatter.