Enum Brush

pub enum Brush<'a> {
    Solid {
        palette_index: u16,
        alpha: f32,
    },
    LinearGradient {
        p0: Point<f32>,
        p1: Point<f32>,
        color_stops: &'a [ColorStop],
        extend: Extend,
    },
    RadialGradient {
        c0: Point<f32>,
        r0: f32,
        c1: Point<f32>,
        r1: f32,
        color_stops: &'a [ColorStop],
        extend: Extend,
    },
    SweepGradient {
        c0: Point<f32>,
        start_angle: f32,
        end_angle: f32,
        color_stops: &'a [ColorStop],
        extend: Extend,
    },
}

A fill type of a COLRv1 glyph (solid fill or various gradient types).

The client receives the information about the fill type in the fill callback of the ColorPainter trait.

Variants

Solid

A solid fill with the color specified by palette_index. The respective color from the CPAL table then needs to be multiplied with alpha.

Fields

palette_index: u16

alpha: f32

LinearGradient

A linear gradient, normalized from the P0, P1 and P2 representation in the COLRv1 table to a linear gradient between two points p0 and p1. If there is only one color stop, the client should draw a solid fill with that color. The color_stops are normalized to the range from 0 to 1.

Fields

p0: Point<f32>

p1: Point<f32>

color_stops: &'a [ColorStop]

extend: Extend

RadialGradient

A radial gradient, with color stops normalized to the range of 0 to 1. Caution: This normalization can mean that negative radii occur. It is the client’s responsibility to truncate the color line at the 0 position, interpolating between r0 and r1 and compute an interpolated color at that position.

Fields

c0: Point<f32>

r0: f32

c1: Point<f32>

r1: f32

color_stops: &'a [ColorStop]

extend: Extend

SweepGradient

A sweep gradient, also called conical gradient. The color stops are normalized to the range from 0 to 1 and the returned angles are to be interpreted in clockwise direction (swapped from the meaning in the font file). The stop normalization may mean that the angles may be larger or smaller than the range of 0 to 360. Note that only the range from 0 to 360 degrees is to be drawn, see https://learn.microsoft.com/en-us/typography/opentype/spec/colr#sweep-gradients.

Fields

c0: Point<f32>

start_angle: f32

end_angle: f32

color_stops: &'a [ColorStop]

extend: Extend

Trait Implementations

impl<'a> Clone for Brush<'a>

fn clone(&self) -> Brush<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Brush<'a>

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

Formats the value using the given formatter.

impl<'a> PartialEq for Brush<'a>

fn eq(&self, other: &Brush<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> StructuralPartialEq for Brush<'a>