| <!doctype html> |
| <html> |
| <head> |
| <title>Test ClearRect works properly if it doesn't clear the full canvas.</title> |
| </head> |
| <body> |
| <canvas id="c" width=100 height=100></canvas> |
| <script> |
| |
| var c2 = document.getElementById("c"); |
| var offscreen_canvas = c2.transferControlToOffscreen(); |
| var ctx_o = offscreen_canvas.getContext('2d'); |
| |
| // Since it checks if content retaining |mode_| changes from frame to frame, |
| // multiple calls to rAF are used to assure the creation of new frame. |
| ctx_o.fillRect(50, 50, 50, 50); |
| ctx_o.clearRect(0, 0, 100, 90); |
| window.requestAnimationFrame(dt => { |
| ctx_o.fillRect(0, 0, 15, 15); |
| // Two RAF, back to back, just after notifyDone may be needed sometimes due to our test |
| // infrastructure. Never add more than two to fix a flaky test. |
| window.requestAnimationFrame(dt => { |
| window.requestAnimationFrame(dt => { |
| testRunner.notifyDone(); |
| }); |
| }); |
| }); |
| |
| if (window.testRunner) { |
| testRunner.waitUntilDone(); |
| } |
| |
| </script> |
| </body> |
| </html> |
