display all sprites for testing

src/app.ts

@@ -1,13 +1,25 @@
+import {fetchPalette, Palette} from "./sprite";
+
 export class App {
     private canvas: HTMLCanvasElement;
+    private readonly context: CanvasRenderingContext2D;
     private lastTime: DOMHighResTimeStamp = 0;
     private isRunning: boolean = false;
 
+    private palette?: Palette;
+
     public constructor(canvas: HTMLCanvasElement) {
         this.canvas = canvas;
-        this.updateSize(window.innerWidth, window.innerHeight);
+        const context = canvas.getContext("2d");
+        if (context === null) {
+            throw new Error("Failed to get 2D context");
+        }
+        context.imageSmoothingEnabled = false; // pixelart
+        this.context = context;
 
-        document.onresize = () => this.updateSize(window.innerWidth, window.innerHeight);
+        this.updateSize(window.innerWidth, window.innerHeight);
+        window.onresize = () => this.updateSize(window.innerWidth, window.innerHeight);
+        fetchPalette("").then(p => this.palette = p);
     }
 
     public run() {
@@ -20,7 +32,16 @@ export class App {
     }
 
     private draw(time: DOMHighResTimeStamp) {
-        // TODO: actually draw stuff
+        this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
+        if (this.palette) {
+            let x = 0;
+            for (let s of this.palette.sprites) {
+                for (let y = 0; y < 4; y++) {
+                    s.draw(this.context, y * 128, x, y);
+                }
+                x += 128;
+            }
+        }
 
         this.lastTime = time;
         if (this.isRunning) {