| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| canvas { |
| width: 200px; |
| height: 200px; |
| filter: drop-shadow(0px 0px 4px black) drop-shadow(0px 0px 4px black); |
| } |
| </style> |
| <script src="../../resources/ui-helper.js"></script> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| |
| addEventListener("load", async () => { |
| let context = document.querySelector("canvas").getContext("2d"); |
| |
| context.lineWidth = 5; |
| context.moveTo(150, 150); |
| context.lineTo(250, 250); |
| context.moveTo(250, 150); |
| context.lineTo(150, 250); |
| context.strokeStyle = "red"; |
| context.stroke(); |
| |
| await UIHelper.renderingUpdate(); |
| context.clearRect(0, 0, 400, 400); |
| |
| await UIHelper.renderingUpdate(); |
| |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }); |
| </script> |
| </head> |
| <body> |
| <canvas width="400" height="400"></canvas> |
| <p>The above canvas should be completely blank shortly after page load.</p> |
| </body> |
| </html> |
