Struct CompositeGroupDesc 

#[non_exhaustive]
pub struct CompositeGroupDesc {
    pub bounds: Rect,
    pub mode: BlendMode,
    pub quality: EffectQuality,
    pub opacity: f32,
}

Descriptor for an isolated compositing group (ADR 0247).

The group is rendered into an offscreen intermediate and then composited back onto the parent target using the requested mode. bounds is a computation bound (not an implicit clip).

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

bounds: Rect

Computation bounds (not an implicit clip), see ADR 0247.

mode: BlendMode

quality: EffectQuality

opacity: f32

Group-level opacity multiplier applied when the group is composited back to its parent.

This enables CSS-like isolated opacity semantics (e.g. saveLayerAlpha): overlapping children inside the group blend with each other normally, then the final group result is multiplied by this opacity.

Default: 1.0.

Implementations

impl CompositeGroupDesc

pub const fn new(bounds: Rect, mode: BlendMode, quality: EffectQuality) -> Self

pub fn with_opacity(self, opacity: f32) -> Self

Trait Implementations

impl Clone for CompositeGroupDesc

fn clone(&self) -> CompositeGroupDesc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompositeGroupDesc

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

Formats the value using the given formatter.

impl PartialEq for CompositeGroupDesc

fn eq(&self, other: &CompositeGroupDesc) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for CompositeGroupDesc

impl StructuralPartialEq for CompositeGroupDesc