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use lyon::tessellation::FillOptions;
/// Nodes that support fill tessellation.
///
/// This trait allows the `Drawing` context to automatically provide an implementation of the
/// following builder methods for all primitives that provide some fill tessellation options.
pub trait SetFill: Sized {
/// Provide a mutable reference to the `FillOptions` field.
fn fill_options_mut(&mut self) -> &mut FillOptions;
/// Specify the whole set of fill tessellation options.
fn fill_opts(mut self, opts: FillOptions) -> Self {
*self.fill_options_mut() = opts;
self
}
/// Maximum allowed distance to the path when building an approximation.
fn fill_tolerance(mut self, tolerance: f32) -> Self {
self.fill_options_mut().tolerance = tolerance;
self
}
/// Specify the rule used to determine what is inside and what is outside of the shape.
///
/// Currently, only the `EvenOdd` rule is implemented.
fn fill_rule(mut self, rule: lyon::tessellation::FillRule) -> Self {
self.fill_options_mut().fill_rule = rule;
self
}
/// Whether to perform a vertical or horizontal traversal of the geometry.
///
/// Default value: `Vertical`.
fn fill_sweep_orientation(mut self, orientation: lyon::tessellation::Orientation) -> Self {
self.fill_options_mut().sweep_orientation = orientation;
self
}
/// A fast path to avoid some expensive operations if the path is known to not have any
/// self-intersections.
///
/// Do not set this to `false` if the path may have intersecting edges else the tessellator may
/// panic or produce incorrect results. In doubt, do not change the default value.
///
/// Default value: `true`.
fn handle_intersections(mut self, handle: bool) -> Self {
self.fill_options_mut().handle_intersections = handle;
self
}
}
impl SetFill for Option<FillOptions> {
fn fill_options_mut(&mut self) -> &mut FillOptions {
self.get_or_insert_with(Default::default)
}
}