1678909-1.html (424B)
1 <!DOCTYPE html> 2 <head><meta charset="utf-8"></head> 3 <body> 4 <canvas id="canvas" width="200" height="200"></canvas> 5 <script> 6 let canvas = document.getElementById('canvas'); 7 let ctx = canvas.getContext('2d'); 8 let arr = new Uint8ClampedArray(Array(40000).fill(200)); 9 createImageBitmap(new ImageData(arr, 100)).then(img => { 10 for (let i=0; i<100; i+=50) 11 ctx.drawImage(img, i, i); 12 }); 13 </script> 14 </body>