[WIP] Building blocks for shape reuse

Cargo.toml

@@ -38,6 +38,7 @@ temp-env = "0.3.3"
 [workspace]
 
 members = [
+    "shape-brokkr",
     "fontdrasil",
     "fontbe",
     "fontir",

shape-brokkr/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "shape-brokkr"
+version = "0.0.1"
+edition = "2021"
+license = "MIT/Apache-2.0"
+description = "A simple representation of a path, meant for use in fonts. Tools to find reusable parts in sets of shapes."
+repository = "https://github.com/googlefonts/fontmake-rs"
+readme = "README.md"
+categories = ["text-processing", "parsing", "graphics"]
+
+[features]
+
+[dependencies]
+thiserror = "1.0.37"
+
+kurbo = "0.9.0"
+ordered-float = "3.4.0"
+serde = {version = "1.0", features = ["derive"] }
+
+log = "0.4"
+env_logger = "0.9.0"
+
+[dev-dependencies]
+diff = "0.1.12"
+ansi_term = "0.12.1"
+tempfile = "3.3.0"

shape-brokkr/src/error.rs

@@ -0,0 +1,10 @@
+use kurbo::BezPath;
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum Error {
+    #[error("{1} {0:?}")]
+    InvalidPath(BezPath, String),
+    #[error("No curve contains significant movement")]
+    NoSignificantActivity,
+}

shape-brokkr/src/lib.rs

@@ -0,0 +1,7 @@
+//! Library to aid in identifying reusable shapes.
+//!
+//! Derived from <https://github.com/googlefonts/nanoemoji>'s implementation
+//! of shape reuse.
+mod error;
+pub use error::Error;
+pub mod reuse;