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#![doc(html_logo_url = "https://nical.github.io/lyon-doc/lyon-logo.svg")]
#![deny(bare_trait_objects)]
pub use lyon_geom as geom;
#[cfg(feature = "serialization")]
#[macro_use]
pub extern crate serde;
mod events;
mod path_state;
mod path;
pub mod commands;
pub mod polygon;
pub mod iterator;
pub mod builder;
pub use crate::path::*;
pub use crate::events::*;
pub use crate::path_state::*;
pub use crate::geom::ArcFlags;
pub use crate::geom::math as math;
use std::u32;
use std::fmt;
use math::Point;
#[derive(Copy, Clone, Debug, PartialEq)]
#[cfg_attr(feature = "serialization", derive(Serialize, Deserialize))]
pub enum FillRule {
EvenOdd,
NonZero,
}
impl FillRule {
#[inline]
pub fn is_in(&self, winding_number: i16) -> bool {
match *self {
FillRule::EvenOdd => { winding_number % 2 != 0 }
FillRule::NonZero => { winding_number != 0 }
}
}
#[inline]
pub fn is_out(&self, winding_number: i16) -> bool {
!self.is_in(winding_number)
}
}
#[derive(Copy, Clone, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "serialization", derive(Serialize, Deserialize))]
pub struct ControlPointId(pub u32);
impl ControlPointId {
pub const INVALID: Self = ControlPointId(u32::MAX);
pub fn offset(self) -> usize { self.0 as usize }
pub fn to_usize(self) -> usize { self.0 as usize }
pub fn from_usize(val: usize) -> Self { ControlPointId(val as u32) }
}
impl fmt::Debug for ControlPointId {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "#{}", self.0)
}
}
#[derive(Copy, Clone, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "serialization", derive(Serialize, Deserialize))]
pub struct EndpointId(pub u32);
impl EndpointId {
pub const INVALID: Self = EndpointId(u32::MAX);
pub fn offset(self) -> usize { self.0 as usize }
pub fn to_usize(self) -> usize { self.0 as usize }
pub fn from_usize(val: usize) -> Self { EndpointId(val as u32) }
}
impl fmt::Debug for EndpointId {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "#{}", self.0)
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
#[cfg_attr(feature = "serialization", derive(Serialize, Deserialize))]
pub struct EventId(
#[doc(hidden)]
pub u32
);
impl EventId {
pub const INVALID: Self = EventId(std::u32::MAX);
pub fn to_usize(&self) -> usize { self.0 as usize }
}
pub trait Position {
fn position(&self) -> Point;
}
impl<U> Position for crate::geom::euclid::Point2D<f32, U> {
fn position(&self) -> Point { self.to_untyped() }
}
impl<'l, T: Position> Position for &'l T {
fn position(&self) -> Point { (*self).position() }
}
impl Position for (f32, f32) {
fn position(&self) -> Point { Point::new(self.0, self.1) }
}
impl Position for [f32; 2] {
fn position(&self) -> Point { Point::new(self[0], self[1]) }
}
pub trait PositionStore {
fn get_endpoint(&self, id: EndpointId) -> Point;
fn get_control_point(&self, id: ControlPointId) -> Point;
}
impl<'l> PositionStore for (&'l [Point], &'l [Point]) {
fn get_endpoint(&self, id: EndpointId) -> Point {
self.0[id.to_usize()]
}
fn get_control_point(&self, id: ControlPointId) -> Point {
self.1[id.to_usize()]
}
}
pub trait AttributeStore {
fn get(&self, id: EndpointId) -> &[f32];
fn num_attributes(&self) -> usize;
}
impl AttributeStore for () {
fn num_attributes(&self) -> usize { 0 }
fn get(&self, _: EndpointId) -> &[f32] { &[] }
}
pub struct AttributeSlice<'l> {
data: &'l [f32],
stride: usize,
}
impl<'l> AttributeSlice<'l> {
pub fn new(data: &'l[f32], num_attributes: usize) -> Self {
AttributeSlice {
data,
stride: num_attributes,
}
}
}
impl<'l> AttributeStore for AttributeSlice<'l> {
fn get(&self, id: EndpointId) -> &[f32] {
let start = id.to_usize() * self.stride;
let end = start + self.stride;
&self.data[start..end]
}
fn num_attributes(&self) -> usize { self.stride }
}