| <!DOCTYPE HTML> |
| |
| <!-- READ BEFORE UPDATING: |
| If this test is updated make sure to increment the "revision" value of the |
| associated test in content/test/gpu/page_sets/pixel_tests.py. This will ensure |
| that the baseline images are regenerated on the next run. |
| --> |
| |
| <html> |
| <head> |
| <title>Low Latency Canvas 2D Test: Green box, over large red box, over black</title> |
| <style type="text/css"> |
| .nomargin { |
| margin: 0px auto; |
| } |
| </style> |
| <script> |
| let g_swapsBeforeAck = 15; |
| let g_canvas; |
| let g_c2d; |
| |
| function main() |
| { |
| g_canvas = document.getElementById("c"); |
| g_c2d = g_canvas.getContext("2d", {lowLatency: true}); |
| draw(); |
| } |
| |
| function draw() |
| { |
| g_c2d.clearRect(0, 0, g_canvas.width, g_canvas.height); |
| g_c2d.fillStyle = "red"; |
| g_c2d.fillRect(10, 10, 80, 80); |
| requestAnimationFrame(draw2); |
| } |
| |
| function draw2() |
| { |
| // Verify that incremental painting works. |
| g_c2d.fillStyle = "green"; |
| g_c2d.fillRect(20, 20, 60, 60); |
| waitForFinish(); |
| } |
| |
| function waitForFinish() |
| { |
| if (g_swapsBeforeAck == 0) { |
| domAutomationController.send("SUCCESS"); |
| } else { |
| g_swapsBeforeAck--; |
| window.requestAnimationFrame(waitForFinish); |
| } |
| } |
| </script> |
| </head> |
| <body onload="main()"> |
| <canvas id="c" width="100" height="100" class="nomargin" style="background-color:black"></canvas> |
| </body> |
| </html> |
