Struct ExternalBackdrop

pub struct ExternalBackdrop<'a> {
    pub image: &'a Image,
    pub scale: f32,
    pub blurred: bool,
    pub raw_image: Option<&'a Image>,
}

A backdrop image handed to BackgroundBlur layers that render into isolated buffers (e.g. KMS planes) and therefore can’t see the content behind them.

• image: composite of the planes below, a uniformly scaled copy of the whole scene (see scale).
• scale: the image’s resolution relative to the scene (1.0 = full res, 0.25 = quarter). The layer’s global region is sampled at this scale.
• blurred: the caller already blurred image. The consumer then seeds it directly and SKIPS its own blur pass — blurring within the layer’s clipped shape samples transparent pixels at the edge and leaves a faded rim that re-exposes the raw seed. Blurring the whole image once avoids that.
• raw_image: the unblurred composite of the planes below, at the same scale. A layer with blur_include_content set seeds THIS instead of the pre-blurred image and runs the real blur, so same-plane content painted earlier in the pass (e.g. a popup underneath this one) is blurred into the result — the pre-blurred image can’t include it. None (the default) leaves such layers on the pre-blurred fast path.

Fields

image: &'a Image

scale: f32

blurred: bool

raw_image: Option<&'a Image>

Trait Implementations

impl<'a> Clone for ExternalBackdrop<'a>

fn clone(&self) -> ExternalBackdrop<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Copy for ExternalBackdrop<'a>