Compiled wasm interface.

rustwasm/wasm-bindgen#111

rendering/src/raytracer/external.rs

@@ -5,7 +5,7 @@ use crate::raytracer::Image;
 use ndarray::arr1;
 use std::time::Instant;
 
-type Frame = Image;
+pub type Frame = Image;
 
 #[no_mangle]
 pub extern "C" fn get_frame() -> Box<Frame> {

rendering_wasm/src/lib.rs

@@ -1,6 +1,6 @@
 extern crate rendering;
 
-//use rendering::raytracer::external::{get_frame, Frame};
+use rendering::raytracer::external::get_frame;
 use wasm_bindgen::prelude::*;
 
 mod utils;
@@ -21,7 +21,44 @@ pub fn greet() {
     alert("Hello, {{project-name}}!");
 }
 
-//#[wasm_bindgen]
-//pub fn render() -> Box<Frame> {
-//    get_frame()
-//}
+#[wasm_bindgen]
+pub fn render() -> ByteStream {
+    let frame = get_frame();
+    ByteStream::new(&frame.data, frame.width, frame.height)
+}
+
+#[wasm_bindgen]
+pub struct ByteStream {
+    data: *const u8,
+    width: u32,
+    height: u32,
+    size: usize,
+}
+
+#[wasm_bindgen]
+impl ByteStream {
+    pub fn new(bytes: &[u8], width: u32, height: u32) -> ByteStream {
+        ByteStream {
+            data: bytes.as_ptr(),
+            size: bytes.len(),
+            width,
+            height,
+        }
+    }
+
+    pub fn data(&self) -> *const u8 {
+        self.data
+    }
+
+    pub fn size(&self) -> usize {
+        self.size
+    }
+
+    pub fn width(&self) -> u32 {
+        self.width
+    }
+
+    pub fn height(&self) -> u32 {
+        self.height
+    }
+}