Struct CullCtx 

pub struct CullCtx { /* private fields */ }

Culling configuration for Runtime::paint_region.

ENABLED is the default for paint, paint_if_dirty, and the platform. DISABLED forces a full CPU pass; RenderList still clips fully off-screen items at push time, so the visible output is unchanged.

Implementations

impl CullCtx

pub const DISABLED: Self

Culling disabled – walk and paint the full tree.

pub const ENABLED: Self

Culling enabled with an 8 px margin (safe for BoxStyle shadows).

pub const fn new() -> Self

pub const fn disabled() -> Self

pub fn with_margin(self, margin: f32) -> Self

pub fn is_enabled(self) -> bool

pub fn margin(self) -> f32

pub fn intersects(self, rect: Rect, clip: Option<Rect>) -> bool

Does rect (expanded by the margin) intersect clip?

• Culling disabled → true.
• clip = None (no clip on the path) → true.
• Empty clip → false (nothing is visible).

pub fn fully_clipped( self, rect: Rect, clip: Option<Rect>, clip_self: bool, ) -> bool

Is the whole subtree invisible?

Unlike !intersects, this also requires the element to clip itself (clip_self), so its children are clipped to the parent rect too. Without clip_self, children may overflow (e.g. overflow: Visible) and must not be skipped.

Trait Implementations

impl Clone for CullCtx

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CullCtx

impl Debug for CullCtx

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

Formats the value using the given formatter.

impl Default for CullCtx

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for CullCtx

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CullCtx