GPU ascii rendering

src/renderer/Canvas.ts

@@ -0,0 +1,14 @@
+export function createBackgroundFillData(width: number, height: number, r: number, g: number, b: number, a: number): Uint8ClampedArray {
+  const data = new Uint8ClampedArray(width * height * 4);
+  let offset = 0;
+  for (let i = 0; i < height; i++) {
+    for (let j = 0; j < width; j++) {
+      data[offset] = r;
+      data[offset + 1] = g;
+      data[offset + 2] = b;
+      data[offset + 3] = a;
+      offset += 4;
+    }
+  }
+  return data;
+}