First cut at stroke expansion

Cargo.toml

@@ -17,6 +17,9 @@ features = ["mint", "schemars", "serde"]
 default = ["std"]
 std = []
 
+[dependencies]
+smallvec = "1.10"
+
 [dependencies.arrayvec]
 version = "0.7.1"
 default-features = false

src/bezpath.rs

@@ -1250,6 +1250,17 @@ impl PathEl {
             PathEl::ClosePath => false,
         }
     }
+
+    /// Get the end point of the path element, if it exists.
+    pub fn end_point(&self) -> Option<Point> {
+        match self {
+            PathEl::MoveTo(p) => Some(*p),
+            PathEl::LineTo(p1) => Some(*p1),
+            PathEl::QuadTo(_, p2) => Some(*p2),
+            PathEl::CurveTo(_, _, p3) => Some(*p3),
+            _ => None,
+        }
+    }
 }
 
 /// Implements [`Shape`] for a slice of [`PathEl`], provided that the first element of the slice is

src/lib.rs

@@ -107,6 +107,7 @@ mod rounded_rect_radii;
 mod shape;
 pub mod simplify;
 mod size;
+mod stroke;
 #[cfg(feature = "std")]
 mod svg;
 mod translate_scale;
@@ -130,6 +131,7 @@ pub use crate::rounded_rect::*;
 pub use crate::rounded_rect_radii::*;
 pub use crate::shape::*;
 pub use crate::size::*;
+pub use crate::stroke::*;
 #[cfg(feature = "std")]
 pub use crate::svg::*;
 pub use crate::translate_scale::*;