2 Copyright (c) 2012 Cameron Adams. All rights reserved.
3 Copyright (c) 2012 Code Aurora Forum. All rights reserved.
4 Copyright (C) 2013 Google Inc. All rights reserved.
6 Redistribution and use in source and binary forms, with or without
7 modification, are permitted provided that the following conditions are
9 * Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11 * Redistributions in binary form must reproduce the above
12 copyright notice, this list of conditions and the following disclaimer
13 in the documentation and/or other materials provided with the
15 * Neither the name of Code Aurora Forum Inc., Google Inc. nor the
16 names of its contributors may be used to endorse or promote products
17 derived from this software without specific prior written permission.
19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 This test is based on code written by Cameron Adams and imported from
32 http://themaninblue.com/experiment/AnimationBenchmark/html
37 <title>Benchmark - Balls Animation using CSS Animations</title>
58 <script src="../resources/runner.js"></script>
59 <script src="resources/framerate.js"></script>
62 var stageHeight = 600;
63 var maxParticles = 2500;
65 var maxVelocity = 500;
66 var particleRadius = 6;
67 var colors = ["#cc0000", "#ffcc00", "#aaff00", "#0099cc", "#194c99", "#661999"];
68 var animationDuration = 10;
72 window.onload = function () {
73 PerfTestRunner.prepareToMeasureValuesAsync({
74 description: "Measure performance of CSS Animations animating 'left' and 'top'.",
79 generateStyleElement();
81 // Create the particles
82 for (var i = 0; i < maxParticles; i++) {
83 var particle = new Particle(i);
85 particles.push(particle);
88 startTrackingFrameRate();
91 function generateStyleElement() {
92 var allParticleKeyframes = '';
93 for (var i = 0; i < maxParticles; i++)
94 allParticleKeyframes += generateParticleKeyframes(i);
95 document.querySelector('#keyframes').innerHTML = allParticleKeyframes;
98 function generateParticleKeyframes(index) {
99 var keyframes = '@-webkit-keyframes ' + animationNameForIndex(index) + '{\n';
101 var angle = Math.PI * 2 * PerfTestRunner.random();
102 var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
103 var x = stageWidth / 2 - particleRadius;
104 var y = stageHeight / 2 - particleRadius;
105 var dx = Math.cos(angle) * velocity;
106 var dy = Math.sin(angle) * velocity;
108 function detectCollision(lineX, normalX, lineY, normalY) {
111 if (dx * normalX < 0)
112 dtx = (lineX - x) / dx;
113 if (dy * normalY < 0)
114 dty = (lineY - y) / dy;
115 var dt = Math.min(dtx, dty);
116 var hitX = (dtx < dty);
119 x: hitX ? lineX : x + (dx * dt),
120 y: hitX ? y + (dy * dt) : lineY,
127 keyframes += generateKeyframe(0, x, y);
128 while (t < animationDuration) {
129 var collisionA = detectCollision(0, 1, 0, 1);
130 var collisionB = detectCollision(stageWidth, -1, stageHeight, -1);
131 var collision = collisionA.dt < collisionB.dt ? collisionA : collisionB;
132 if (t + collision.dt > animationDuration) {
133 var dt = animationDuration - t;
134 t = animationDuration;
144 keyframes += generateKeyframe(t, x, y);
151 function generateKeyframe(t, x, y) {
152 return (100 * t / animationDuration) + '% { left: ' + x + 'px; top: ' + y + 'px; }\n';
155 function animationNameForIndex(index) {
156 return 'animation-' + index;
159 function Particle(index)
161 // Create visual element for the particle.
162 var domNode = document.createElement('span');
163 document.body.appendChild(domNode);
165 // Set colour of element.
166 domNode.style.backgroundColor = colors[Math.floor(Math.random() * colors.length)];
167 domNode.style.webkitAnimationTimingFunction = 'linear';
168 domNode.style.webkitAnimationIterationCount = 'infinite';
169 domNode.style.webkitAnimationDirection = 'alternate';
170 domNode.style.webkitAnimationDuration = animationDuration + 's';
173 domNode.style.webkitAnimationName = animationNameForIndex(index);
178 document.body.removeChild(domNode);
182 this.destroy = destroy;
185 function onCompletedRun() {
187 stopTrackingFrameRate();
189 for (var i = 0; i < particles.length; i++)
190 particles[i].destroy();
194 <style id="keyframes"></style>