Struct RadialPattern 

pub struct RadialPattern { /* private fields */ }

Gradient between two circles (centre c0, radius r0) and (c1, r1).

Implementations

impl RadialPattern

pub fn new( color0: [u8; 3], color1: [u8; 3], c0x: f64, c0y: f64, r0: f64, c1x: f64, c1y: f64, r1: f64, t0: f64, t1: f64, extend_start: bool, extend_end: bool, ) -> Self

Create a radial gradient.

• color0 / color1: RGB at inner / outer circle.
• (c0x, c0y, r0): inner circle centre and radius (≥ 0).
• (c1x, c1y, r1): outer circle centre and radius (≥ 0).
• t0, t1: parameter range mapping to color0 / color1. May be inverted (t0 > t1).
• extend_start / extend_end: extend colour beyond the gradient circles.

Trait Implementations

impl Pattern for RadialPattern

fn fill_span(&self, y: i32, x0: i32, x1: i32, out: &mut [u8])

Fill out with colour bytes for pixels x0..=x1 on scanline y.

fn is_static_color(&self) -> bool

Return true if this pattern yields the same colour at every coordinate. When true, fill_span will be called once and the result reused across the whole span (optimisation hint only — correctness is not affected).