| <style> |
| .container { |
| position: relative; |
| width: 400px; |
| height: 400px; |
| background-color: #ff0000; |
| } |
| .composited { |
| position: absolute; |
| top: 0; |
| left: 0; |
| width: 100%; |
| height: 100%; |
| background-repeat: no-repeat; |
| z-index: 0; |
| } |
| body { |
| opacity: 0; |
| background: rgba(0, 0, 0, 0); |
| } |
| body.background-loaded { |
| opacity: 1; |
| } |
| </style> |
| <body> |
| <div class="container"> |
| <div class="composited"></div> |
| </div> |
| <script> |
| if (window.testRunner) { |
| internals.clearMemoryCache(); |
| internals.settings.setLargeImageAsyncDecodingEnabled(true); |
| testRunner.waitUntilDone(); |
| } |
| |
| var image = new Image(); |
| image.onload = function() { |
| // Force very long async image decoding for this image. |
| if (window.internals) |
| internals.setImageFrameDecodingDuration(image, 5000); |
| |
| // Change the background of the element. |
| let element = document.querySelector(".composited"); |
| element.style.backgroundImage = 'url(' + image.src + ')'; |
| |
| // Show the body element and end the test. |
| document.body.classList.add("background-loaded"); |
| testRunner.notifyDone(); |
| }; |
| image.src = "resources/green-400x400.png"; |
| </script> |
| </body> |
