Enum MaskShader 

pub enum MaskShader {
    Linear {
        from: Point,
        to: Point,
        from_color: Color,
        to_color: Color,
    },
    Radial {
        center: Point,
        radius: f32,
        from_color: Color,
        to_color: Color,
    },
}

What a layer does at compositing, for painting a scene by hand. The colour a ShaderMask blends over its subtree, as a two-stop fade.

The geometry is absolute, in the same space as the primitives it covers — the same choice PathGradient makes, and for the same reason: a fade should be aimed at something real, and a scene primitive holding a fraction of a box no longer knows which box.

The widget is where fractions belong, and ShaderMask there does take them: it resolves a FractionalMask against its own box on the way into the scene.

Two stops rather than a list, which is what the gradients elsewhere in this framework offer; a mask needing more is a CustomPaint away.

Variants

Linear

A straight fade from from to to, clamped outside that span.

Fields

from: Point

Where from_color holds.

to: Point

Where to_color holds.

from_color: Color

The colour at from.

to_color: Color

The colour at to.

Radial

A fade outwards from center, reaching to_color at radius.

Fields

center: Point

The centre.

radius: f32

Where to_color holds, in pixels from the centre.

from_color: Color

The colour at the centre.

to_color: Color

The colour at radius and beyond.

Implementations

impl MaskShader

pub const fn code(self) -> u32

The shader rank for this kind.

pub fn scaled_xy(self, sx: f32, sy: f32) -> MaskShader

Scales the geometry per axis, as a DPI or paint scale does. A radius has no axis of its own and follows the average, like every other scalar length in a scene.

pub fn translated(self, dx: f32, dy: f32) -> MaskShader

Moves the geometry with the subtree it covers.

Trait Implementations

impl Clone for MaskShader

fn clone(&self) -> MaskShader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MaskShader

impl Debug for MaskShader

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

Formats the value using the given formatter.

impl PartialEq for MaskShader

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MaskShader