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//! Fill [crate::widget::canvas::Geometry] with a certain style.
use crate::gradient::Gradient;
use crate::layer::mesh;
use iced_native::Color;
use crate::widget::canvas::frame::Transform;
/// The style used to fill geometry.
#[derive(Debug, Clone)]
pub struct Fill<'a> {
/// The color or gradient of the fill.
///
/// By default, it is set to [`FillStyle::Solid`] `BLACK`.
pub style: Style<'a>,
/// The fill rule defines how to determine what is inside and what is
/// outside of a shape.
///
/// See the [SVG specification][1] for more details.
///
/// By default, it is set to `NonZero`.
///
/// [1]: https://www.w3.org/TR/SVG/painting.html#FillRuleProperty
pub rule: FillRule,
}
impl<'a> Default for Fill<'a> {
fn default() -> Fill<'a> {
Fill {
style: Style::Solid(Color::BLACK),
rule: FillRule::NonZero,
}
}
}
impl<'a> From<Color> for Fill<'a> {
fn from(color: Color) -> Fill<'a> {
Fill {
style: Style::Solid(color),
..Fill::default()
}
}
}
/// The color or gradient of a [`Fill`].
#[derive(Debug, Clone)]
pub enum Style<'a> {
/// A solid color
Solid(Color),
/// A color gradient
Gradient(&'a Gradient),
}
impl<'a> Style<'a> {
/// Converts a fill's [Style] to a [mesh::Style] for use in the renderer's shader.
pub(crate) fn as_mesh_style(&self, transform: &Transform) -> mesh::Style {
match self {
Style::Solid(color) => {
mesh::Style::Solid(*color)
},
Style::Gradient(gradient) => {
mesh::Style::Gradient((*gradient).clone().transform(transform))
}
}
}
}
/// The fill rule defines how to determine what is inside and what is outside of
/// a shape.
///
/// See the [SVG specification][1].
///
/// [1]: https://www.w3.org/TR/SVG/painting.html#FillRuleProperty
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[allow(missing_docs)]
pub enum FillRule {
NonZero,
EvenOdd,
}
impl From<FillRule> for lyon::tessellation::FillRule {
fn from(rule: FillRule) -> lyon::tessellation::FillRule {
match rule {
FillRule::NonZero => lyon::tessellation::FillRule::NonZero,
FillRule::EvenOdd => lyon::tessellation::FillRule::EvenOdd,
}
}
}
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