Get rendering working

src/lib.rs

@@ -0,0 +1,81 @@
+mod app;
+mod render;
+
+use wasm_bindgen::{Clamped, prelude::*};
+use web_sys::ImageData;
+
+// use render::Renderer;
+use render::buffer::ImgBuffer;
+use render::rand::Rnd;
+
+use crate::{app::App, render::Renderer};
+
+#[wasm_bindgen]
+extern "C" {
+    #[wasm_bindgen(js_namespace = console)]
+    pub fn log(s: &str);
+}
+
+#[macro_export]
+macro_rules! log {
+    ($($t:tt)*) => (log(&format_args!($($t)*).to_string()))
+}
+
+#[wasm_bindgen]
+pub fn init(canvas: &web_sys::HtmlCanvasElement, width: u32, height: u32) -> App {
+    let (cwidth, cheight, dist_x, dist_y) = render::calc_resolution(width, height);
+    canvas.set_width(cwidth);
+    canvas.set_height(cheight);
+
+    log!("WASM Successfully initialized!");
+
+    let mut renderer = Renderer {
+        ctx: canvas
+            .get_context("2d")
+            .unwrap()
+            .unwrap()
+            .dyn_into::<web_sys::CanvasRenderingContext2d>()
+            .unwrap(),
+        img: ImgBuffer::new(width, height),
+        rand: Rnd::new(9825782),
+
+        canvas_width: cwidth,
+        canvas_height: cheight,
+        actual_width: width,
+        actual_height: height,
+
+        distortion_x: dist_x,
+        distortion_y: dist_y,
+    };
+
+    renderer.resize(width, height);
+
+    App::new(renderer)
+}
+
+#[wasm_bindgen]
+pub fn resize(app: &mut App, width: u32, height: u32) {
+    app.resize(width, height);
+}
+
+#[wasm_bindgen]
+pub fn draw(app: &mut App) {
+    // app.renderer.img.randomize(&mut app.renderer.rand);
+    app.draw();
+}
+
+#[wasm_bindgen]
+pub fn click(app: &mut App, x: i32, y: i32) {
+    // ctx.img.randomize(&mut ctx.rand);
+    // draw::draw(ctx);
+
+    app.renderer.circle(x, y, 20, (255, 255, 255));
+
+    let data = ImageData::new_with_u8_clamped_array_and_sh(
+        Clamped(&app.renderer.img.data),
+        app.renderer.img.width(),
+        app.renderer.img.height(),
+    )
+    .unwrap();
+    app.renderer.ctx.put_image_data(&data, 0., 0.).unwrap();
+}