🎉 Improve frame rendering

render-wasm/src/main.rs

@@ -2,6 +2,7 @@ pub mod render;
 pub mod shapes;
 pub mod state;
 pub mod utils;
+pub mod view;
 
 use skia_safe as skia;
 
@@ -43,9 +44,9 @@ pub unsafe extern "C" fn resize_surface(width: i32, height: i32) {
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn draw_all_shapes(zoom: f32, pan_x: f32, pan_y: f32) {
+pub unsafe extern "C" fn render() {
     let state = unsafe { STATE.as_mut() }.expect("got an invalid state pointer");
-    state.draw_all_shapes(zoom, pan_x, pan_y);
+    state.draw_all_shapes(state.view.zoom, state.view.x, state.view.y);
 }
 
 #[no_mangle]
@@ -54,6 +55,14 @@ pub extern "C" fn reset_canvas() {
     state.render_state().reset_canvas();
 }
 
+#[no_mangle]
+pub extern "C" fn set_view(zoom: f32, x: f32, y: f32) {
+    let state = unsafe { STATE.as_mut() }.expect("got an invalid state pointer");
+    state.view.x = x;
+    state.view.y = y;
+    state.view.zoom = zoom;
+}
+
 #[no_mangle]
 pub extern "C" fn use_shape(a: u32, b: u32, c: u32, d: u32) {
     let state = unsafe { STATE.as_mut() }.expect("got an invalid state pointer");

render-wasm/src/state.rs

@@ -3,6 +3,7 @@ use uuid::Uuid;
 
 use crate::render::RenderState;
 use crate::shapes::Shape;
+use crate::view::View;
 
 /// This struct holds the state of the Rust application between JS calls.
 ///
@@ -14,6 +15,7 @@ pub(crate) struct State<'a> {
     pub current_id: Option<Uuid>,
     pub current_shape: Option<&'a mut Shape>,
     pub shapes: HashMap<Uuid, Shape>,
+    pub view: View,
 }
 
 impl<'a> State<'a> {
@@ -23,6 +25,11 @@ impl<'a> State<'a> {
             current_id: None,
             current_shape: None,
             shapes: HashMap::with_capacity(capacity),
+            view: View {
+                x: 0.,
+                y: 0.,
+                zoom: 1.,
+            }
         }
     }
 

render-wasm/src/view.rs

@@ -0,0 +1,6 @@
+pub(crate) struct View
+{
+  pub x: f32,
+  pub y: f32,
+  pub zoom: f32,
+}