Add window resizing

window.ts

@@ -8,9 +8,9 @@ import { COLOR, palette } from "./colors.ts";
 
 export const gameWindow = createWindow({
 	title: "Faux",
-	width: 1024,
-	height: 1024,
-	resizable: false,
+	width: 512,
+	height: 512,
+	resizable: true,
 	glVersion: [3, 2],
 	gles: true,
 });
@@ -92,16 +92,20 @@ if (status[0] === gl.FALSE) {
 
 gl.ClearColor(0.0, 0.0, 0.0, 1.0);
 
-addEventListener("resize", (event) => {
-	gl.Viewport(0, 0, event.width, event.height);
-});
-
 const pixelsPerRow = 128;
 
 const top = 1;
 const left = -1;
 const cell = 2/pixelsPerRow;
 
+const getHalfAsInt = (n: number) => Number(parseInt(Math.floor(n/2).toString()));
+
+addEventListener("resize", (event) => {
+	const {width, height} = event;
+	const min = Math.min(width, height);
+	gl.Viewport(getHalfAsInt(width-min), getHalfAsInt(height-min), min, min);
+});
+
 const px = (x: number, y: number) => {
 	// deno-fmt-ignore
 	return [