Struct RoundedRectMask 

pub struct RoundedRectMask { /* private fields */ }

Rounded-rectangle mask with deterministic integer edge coverage.

The rectangle uses the same half-open geometry as RectMask: pixels are tested against x..x + width and y..y + height. radius is clamped to half of the effective width and height. Edge coverage is evaluated with a fixed 4x4 integer subpixel grid so the result is deterministic across targets and does not require floating point.

Implementations

impl RoundedRectMask

pub const fn new(rect: Rect, radius: u8) -> Self

Create a rounded-rectangle mask over rect.

pub const fn rect(&self) -> Rect

Return the rectangle covered by this mask before radius clipping.

pub const fn radius(&self) -> u8

Return the requested corner radius in pixels.

Trait Implementations

impl AlphaMask for RoundedRectMask

fn row(&self, x: i32, y: i32, coverage: &mut [u8])

Write one row of alpha coverage into coverage.

fn alpha_at(&self, x: i32, y: i32) -> u8

Return coverage for a single pixel.

impl Clone for RoundedRectMask

fn clone(&self) -> RoundedRectMask

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RoundedRectMask

impl Debug for RoundedRectMask

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

Formats the value using the given formatter.

impl Eq for RoundedRectMask

impl PartialEq for RoundedRectMask

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RoundedRectMask