Struct RadialGradient 

pub struct RadialGradient {
    pub center: (f32, f32),
    pub radius: f32,
    pub stops: Vec<GradientStop>,
}

A radial gradient defined by a centre point, a radius, and colour stops.

The gradient transitions from stops[0] at the centre to stops[-1] at the edge of the circle. Beyond the radius the last stop colour is used.

Fields

center: (f32, f32)

Centre of the gradient circle (logical pixels).

radius: f32

Radius of the gradient circle (logical pixels).

stops: Vec<GradientStop>

Colour stops, sorted by ascending offset (0.0 = centre, 1.0 = edge).

Implementations

impl RadialGradient

pub fn two_stop( center: (f32, f32), radius: f32, inner: Color, outer: Color, ) -> Self

Construct a two-stop radial gradient from inner at the centre to outer at the edge.

pub fn new(center: (f32, f32), radius: f32, stops: Vec<GradientStop>) -> Self

Construct from arbitrary stops; they are sorted by offset internally.

pub fn color_at(&self, px: f32, py: f32) -> Color

Sample the gradient colour at pixel (px, py).

The normalised position t is the Euclidean distance from center divided by radius, clamped to [0, 1].

pub fn sample(&self, t: f32) -> Color

Sample the gradient at normalised position t in [0, 1].

pub fn fill_rect( &self, fb: &mut Framebuffer, clip: &ClipRect, x: f32, y: f32, w: f32, h: f32, )

Fill the rectangle [x, x+w) × [y, y+h) of fb with this radial gradient, clipped to clip.

Trait Implementations

impl Clone for RadialGradient

fn clone(&self) -> RadialGradient

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RadialGradient

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

Formats the value using the given formatter.