Struct webrender_api::GradientBuilder

pub struct GradientBuilder {
    stops: Vec<GradientStop>,
}

Construct a gradient to be used in display lists.

Each gradient needs at least two stops.

Fields

stops: Vec<GradientStop>

Implementations

impl GradientBuilder

pub fn new() -> Self

Create a new gradient builder.

pub fn with_stops(stops: Vec<GradientStop>) -> GradientBuilder

Create a gradient builder with a list of stops.

pub fn push(&mut self, stop: GradientStop)

Push an additional stop for the gradient.

pub fn stops(&self) -> &[GradientStop]

Get a reference to the list of stops.

pub fn into_stops(self) -> Vec<GradientStop>

Return the gradient stops vector.

pub fn gradient( &mut self, start_point: LayoutPoint, end_point: LayoutPoint, extend_mode: ExtendMode ) -> Gradient

Produce a linear gradient, normalize the stops.

pub fn radial_gradient( &mut self, center: LayoutPoint, radius: LayoutSize, extend_mode: ExtendMode ) -> RadialGradient

Produce a radial gradient, normalize the stops.

Will replace the gradient with a single color if the radius negative.

pub fn conic_gradient( &mut self, center: LayoutPoint, angle: f32, extend_mode: ExtendMode ) -> ConicGradient

Produce a conic gradient, normalize the stops.

fn normalize(&mut self, extend_mode: ExtendMode) -> (f32, f32)

Gradients can be defined with stops outside the range of [0, 1] when this happens the gradient needs to be normalized by adjusting the gradient stops and gradient line into an equivalent gradient with stops in the range [0, 1]. this is done by moving the beginning of the gradient line to where stop[0] and the end of the gradient line to stop[n-1]. this function adjusts the stops in place, and returns the amount to adjust the gradient line start and stop.