| <!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/gpu_tests/pixel_test_pages.py. This will ensure |
| that the baseline images are regenerated on the next run. |
| --> |
| |
| <html> |
| <head> |
| <title>OffscreenCanvas 2d commit flow on main thread: Four-color squares on white background.</title> |
| <style type="text/css"> |
| .nomargin { |
| margin: 0px auto; |
| } |
| </style> |
| </head> |
| <body onload="main()"> |
| <div style="position:relative; width:300px; height:300px; background-color:white"> |
| </div> |
| <div id="container" style="position:absolute; top:0px; left:0px"> |
| <canvas id="c" width="200" height="200" class="nomargin"></canvas> |
| </div> |
| <script> |
| var g_swapsBeforeAck = 15; |
| |
| function main() |
| { |
| drawLoop(); |
| } |
| |
| var g_animationFrameNumber = 0; |
| var canvas = document.getElementById("c"); |
| var offscreenCanvas = canvas.transferControlToOffscreen(); |
| var offscreen2d = offscreenCanvas.getContext("2d"); |
| offscreen2d.fillStyle = "red"; |
| offscreen2d.fillRect(0, 0, 200, 200); |
| |
| function drawLoop() |
| { |
| if (g_animationFrameNumber < 10) { |
| g_animationFrameNumber++; |
| // Purposely intersperse overdraw and non-overdraw commit cases to see |
| // if OffscreenCanvas commit() handles both cases well. |
| if (0 == g_animationFrameNumber % 2) { |
| // When promise is used, the next drawLoop() is called after the first |
| // frame is resolved; therefore there is no overdraw in this case. |
| offscreen2d.commit().then(drawLoop); |
| } else { |
| // When the next drawLoop() is invoked regardless the promise resolve |
| // status of the previous commit(), the frame committed in the next |
| // drawLoop() is very likely to be overdrawn. |
| offscreen2d.commit(); |
| drawLoop(); |
| } |
| } else { |
| offscreen2d.fillStyle = "red"; |
| offscreen2d.fillRect(0, 0, 100, 100); |
| offscreen2d.fillStyle = "green"; |
| offscreen2d.fillRect(100, 0, 100, 100); |
| offscreen2d.fillStyle = "blue"; |
| offscreen2d.fillRect(0, 100, 100, 100); |
| offscreen2d.fillStyle = "black"; |
| offscreen2d.fillRect(100, 100, 100, 100); |
| offscreen2d.commit(); |
| |
| // The following fill is never committed |
| offscreen2d.fillStyle = "blue"; |
| offscreen2d.fillRect(0, 0, 200, 200); |
| waitForFinish(); |
| } |
| } |
| |
| function waitForFinish() |
| { |
| if (g_swapsBeforeAck == 0) { |
| domAutomationController.setAutomationId(1); |
| domAutomationController.send("SUCCESS"); |
| } else { |
| g_swapsBeforeAck--; |
| document.getElementById('container').style.zIndex = g_swapsBeforeAck + 1; |
| window.requestAnimationFrame(waitForFinish); |
| } |
| } |
| </script> |
| </body> |
| </html> |
