tools/perf/page_sets/tough_animation_cases/balls_javascript_css.html

   1 <!--
   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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  17 derived from this software without specific prior written permission.
  18
  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
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  23 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  25 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  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.
  30
  31 This test is based on code written by Cameron Adams and imported from
  32   http://themaninblue.com/experiment/AnimationBenchmark/html
  33 -->
  34
  35 <!doctype html>
  36 <head>
  37 <title>Benchmark - Balls Animation using CSS and requestAnimationFrame</title>
  38 <style>
  39 html {
  40     height: 100%;
  41 }
  42
  43 body {
  44     width: 100%;
  45     height: 100%;
  46     overflow: hidden;
  47     margin: 0;
  48     padding: 0;
  49 }
  50
  51 span {
  52     position: absolute;
  53     width: 12px;
  54     height: 12px;
  55     border-radius: 6px;
  56 }
  57 </style>
  58 <script src="resources/perf_test_helper.js"></script>
  59 <script>
  60 var measurementReady = false;
  61 var stageWidth = 600;
  62 var stageHeight = 600;
  63 var maxParticles = 2500;
  64 var minVelocity = 50;
  65 var maxVelocity = 500;
  66 var particleRadius = 6;
  67 var colors = ["#cc0000", "#ffcc00", "#aaff00", "#0099cc", "#194c99", "#661999"];
  68
  69 var testRunning = true;
  70 var particles = [];
  71 var prevTime;
  72
  73 window.onload = function () {
  74     // Create the particles
  75     for (var i = 0; i < maxParticles; i++)
  76         particles.push(new Particle());
  77
  78     // Start the animation
  79     prevTime = performance.now();
  80     animate();
  81     measurementReady = true;
  82 }
  83
  84 function animate()
  85 {
  86     var currTime = performance.now();
  87     var timeDelta = currTime - prevTime;
  88
  89     // Draw each particle
  90     for (var particle in particles)
  91         particles[particle].draw(timeDelta);
  92
  93     prevTime = currTime;
  94
  95     if (testRunning)
  96         requestAnimationFrame(animate);
  97 }
  98
  99 function Particle()
 100 {
 101     var angle = Math.PI * 2 * PerfTestHelper.random();
 102     var velocity = minVelocity + ((maxVelocity - minVelocity) * PerfTestHelper.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;
 107
 108     // Create visual element for the particle
 109     var domNode = document.createElement('span');
 110     document.body.appendChild(domNode);
 111
 112     // Set initial position to middle of screen
 113     domNode.style.left = x + "px";
 114     domNode.style.top = y + "px";
 115
 116     // Set colour of element
 117     domNode.style.backgroundColor = colors[Math.floor(PerfTestHelper.random() * colors.length)];
 118
 119     function destroy()
 120     {
 121         document.body.removeChild(domNode);
 122     }
 123
 124     function draw(timeDelta)
 125     {
 126         var timeDeltaSeconds = timeDelta / 1000;
 127         var testX = x + (dx * timeDeltaSeconds);
 128         var testY = y + (dy * timeDeltaSeconds);
 129
 130         if (testX < 0 || testX > stageWidth) {
 131             dx = -dx;
 132             x += dx;
 133         } else {
 134             x = testX;
 135         }
 136         if (testY < 0 || testY > stageHeight) {
 137             dy = -dy;
 138             y += dy;
 139         } else {
 140             y = testY;
 141         }
 142
 143         domNode.style.left = x + "px";
 144         domNode.style.top = y + "px";
 145     }
 146
 147     this.draw = draw;
 148     this.destroy = destroy;
 149 }
 150 </script>
 151 </head>
 152 </html>