Performance

1 files changed, 14 insertions, 0 deletions

diff --git a/worker.js b/worker.js
new file mode 100644
index 0000000..f89a699
--- /dev/null
+++ b/worker.js
@@ -0,0 +1,14 @@
+let canvas, screen;
+
+self.onmessage = (msg) => {
+  if (msg.data == "clear") {
+    screen.clearRect(0, 0, canvas.width, canvas.height);
+  } else if ("canvas" in msg.data) {
+    canvas = msg.data.canvas;
+    screen = canvas.getContext("2d");
+  } else {
+    [color, x, y, width, height] = msg.data;
+    screen.fillStyle = color;
+    screen.fillRect(x, y, width, height);
+  }
+};