Add WASM bindings and web project structure

packages/cli/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "cli"
 version = "0.1.0"
-authors = ["Keavon Chambers <keavon@keavon.com>"]
+authors = ["Keavon Chambers <graphite@keavon.com>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

packages/render-engine/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "render-engine"
 version = "0.1.0"
-authors = ["Keavon Chambers <keavon@keavon.com>"]
+authors = ["Keavon Chambers <graphite@keavon.com>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

packages/wasm-bindings/.gitignore

@@ -0,0 +1 @@
+pkg/

packages/wasm-bindings/Cargo.toml

@@ -1,9 +1,36 @@
 [package]
 name = "wasm-bindings"
 version = "0.1.0"
-authors = ["Keavon Chambers <keavon@keavon.com>"]
+authors = ["Keavon Chambers <graphite@keavon.com>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["console_error_panic_hook"]
+
 [dependencies]
+wasm-bindgen = "0.2.7"
+
+# The `console_error_panic_hook` crate provides better debugging of panics by
+# logging them with `console.error`. This is great for development, but requires
+# all the `std::fmt` and `std::panicking` infrastructure, so isn't great for
+# code size when deploying.
+console_error_panic_hook = { version = "0.1.6", optional = true }
+
+# `wee_alloc` is a tiny allocator for wasm that is only ~1K in code size
+# compared to the default allocator's ~10K. It is slower than the default
+# allocator, however.
+#
+# Unfortunately, `wee_alloc` requires nightly Rust when targeting wasm for now.
+wee_alloc = { version = "0.4.5", optional = true }
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.13"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"

packages/wasm-bindings/src/lib.rs

@@ -1,7 +1,18 @@
-#[cfg(test)]
-mod tests {
-	#[test]
-	fn it_works() {
-		assert_eq!(2 + 2, 4);
-	}
+mod utils;
+
+use wasm_bindgen::prelude::*;
+
+// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global allocator.
+#[cfg(feature = "wee_alloc")]
+#[global_allocator]
+static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+
+#[wasm_bindgen]
+extern "C" {
+	fn alert(s: &str);
+}
+
+#[wasm_bindgen]
+pub fn greet() {
+	alert("Hello, Graphite!");
 }

packages/wasm-bindings/src/utils.rs

@@ -0,0 +1,10 @@
+pub fn set_panic_hook() {
+	// When the `console_error_panic_hook` feature is enabled, we can call the
+	// `set_panic_hook` function at least once during initialization, and then
+	// we will get better error messages if our code ever panics.
+	//
+	// For more details see
+	// https://github.com/rustwasm/console_error_panic_hook#readme
+	#[cfg(feature = "console_error_panic_hook")]
+	console_error_panic_hook::set_once();
+}