| <!DOCTYPE html> |
| <meta name="viewport" content="width=device-width, user-scalable=no"> |
| <link rel="stylesheet" type="text/css" href="resources/tablet.css"> |
| <script src="resources/perf_test_helper.js"></script> |
| <style> |
| target { |
| position: absolute; |
| width: 0px; |
| height: 0px; |
| border: 5px solid green; |
| border-radius: 100%; |
| } |
| </style> |
| |
| <container id="container"></container> |
| |
| <script> |
| var N = PerfTestHelper.getN(1000); |
| var numKeyframes = 500; |
| var duration = 4000; |
| |
| function makeKeyframes(numKeyframes, width, height) { |
| var keyframes = '@keyframes anim {\n' |
| for (var i = 0; i < numKeyframes + 1; i++) { |
| var fraction = i / numKeyframes; |
| var t = fraction * 2 * Math.PI; |
| var x = Math.cos(t) - Math.pow(Math.cos(4 * t), 3); |
| x = ((x / 4 + 1 / 2) * width).toFixed(5); |
| var y = Math.pow(Math.sin(4 * t), 3) - Math.sin(2 * t); |
| y = ((y / 4 + 1 / 2) * height).toFixed(5); |
| keyframes += (fraction * 100) + '% { transform: translate(' + x + 'px, ' + y + 'px); }\n'; |
| } |
| return keyframes; |
| } |
| |
| var style = document.createElement('style'); |
| style.textContent = makeKeyframes(numKeyframes, 550, 800); |
| |
| for (var i = 0; i < N; i++) { |
| var target = document.createElement('target'); |
| target.style.animation = 'anim ' + duration + 'ms linear infinite ' + (-duration / 10 * i / N) + 'ms'; |
| container.appendChild(target); |
| } |
| |
| container.appendChild(style); |
| |
| PerfTestHelper.signalReady(); |
| </script> |
