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.
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7 modification, are permitted provided that the following conditions are
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15 * Neither the name of Code Aurora Forum Inc., Google Inc. nor the
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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,
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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 HTML5 Canvas</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"];
71 var testRunning = true;
75 window.onload = function () {
76 PerfTestRunner.prepareToMeasureValuesAsync({
77 description: 'Measures performance of canvas animation.',
82 // Prepare the canvas.
83 canvas = document.querySelector('canvas');
84 canvas.width = stageWidth;
85 canvas.height = stageHeight;
86 context = canvas.getContext('2d');
88 // Create the particles
89 for (var i = 0; i < maxParticles; i++)
90 particles.push(new Particle());
92 // Start the animation
93 prevTime = PerfTestRunner.now();
95 startTrackingFrameRate();
100 var currTime = PerfTestRunner.now();
101 var timeDelta = currTime - prevTime;
103 context.clearRect(0, 0, stageWidth, stageHeight);
105 // Draw each particle
106 for (var particle in particles)
107 particles[particle].draw(timeDelta);
112 requestAnimationFrame(animate);
117 var angle = Math.PI * 2 * PerfTestRunner.random();
118 var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestRunner.random());
119 var x = stageWidth / 2 - particleRadius;
120 var y = stageHeight / 2 - particleRadius;
121 var dx = Math.cos(angle) * velocity;
122 var dy = Math.sin(angle) * velocity;
124 // Set colour of element
125 var color = colors[Math.floor(Math.random() * colors.length)];
127 function draw(timeDelta)
129 var timeDeltaSeconds = timeDelta / 1000;
130 var testX = x + (dx * timeDeltaSeconds);
131 var testY = y + (dy * timeDeltaSeconds);
133 if (testX < 0 || testX > stageWidth) {
139 if (testY < 0 || testY > stageHeight) {
146 context.fillStyle = color;
148 context.arc(x, y, particleRadius, 0, Math.PI * 2);
155 function onCompletedRun() {
157 stopTrackingFrameRate();
159 document.body.removeChild(canvas);