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December 14, 2015 23:59
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Canvas (KineticJS) + Shape Caching
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| <!DOCTYPE html> | |
| <html> | |
| <meta charset="utf-8"> | |
| <style> | |
| canvas { | |
| border: 1px dashed gray; | |
| } | |
| #results, #container { | |
| display: inline-block; | |
| margin: 15px; | |
| } | |
| p { | |
| margin: 15px; | |
| } | |
| td { | |
| border: 1px solid #bbb; | |
| } | |
| .header { | |
| font-weight: bold; | |
| } | |
| </style> | |
| <body> | |
| <p id="user-agent"></p> | |
| <div id="container"></div> | |
| <table id="results"> | |
| <tr class="header"> | |
| <td>Circles</td> | |
| <td>FPS</td> | |
| <td>repaint [ms]</td> | |
| </tr> | |
| </table> | |
| <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> | |
| <script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.3.3.min.js"></script> | |
| <script> | |
| /* global requestAnimationFrame, $, Kinetic */ | |
| window.requestAnimationFrame = (function() { | |
| return window.requestAnimationFrame || | |
| window.webkitRequestAnimationFrame || | |
| window.mozRequestAnimationFrame || | |
| window.oRequestAnimationFrame || | |
| window.msRequestAnimationFrame || | |
| function(/* function FrameRequestCallback */ callback, /* DOMElement Element */ element) { | |
| return window.setTimeout(callback, 1000/60); | |
| }; | |
| })(); | |
| var tests = [25, 50, 150, 250, 500, 750]; | |
| function updateResults(count, time, steps) { | |
| var repaint = time / steps, | |
| $tr = $("<tr>"); | |
| $tr.append("<td>" + count + "</td><td>" + (1000/repaint).toFixed(2) + "</td><td>" + repaint.toFixed(2) + "</td>"); | |
| $("#results").append($tr); | |
| } | |
| function test() { | |
| var count, | |
| maxX = 500, | |
| maxY = 400, | |
| maxSteps = 150, | |
| radius = 15, | |
| steps = 0, | |
| circles = [], | |
| cdata = [], | |
| stage, | |
| layer, | |
| startTime, | |
| circle; | |
| if (tests.length > 0) { | |
| $("#container").empty(); | |
| count = tests.shift(); | |
| } else { | |
| return; | |
| } | |
| stage = new Kinetic.Stage({ | |
| container: 'container', | |
| width: maxX, | |
| height: maxY | |
| }); | |
| layer = new Kinetic.Layer(); | |
| circle = new Kinetic.Circle({ | |
| x: radius + 2, | |
| y: radius + 2, | |
| radius: radius, | |
| fill: 'red', | |
| stroke: 'black', | |
| strokeWidth: 2 | |
| }).toImage({ | |
| width: radius * 2 + 4, | |
| height: radius * 2 + 4, | |
| callback: function (img) { | |
| var i; | |
| for (i = 0; i < count; i++) { | |
| cdata.push({ | |
| x: maxX * Math.random(), | |
| y: maxY * Math.random(), | |
| vx: Math.random(), | |
| vy: Math.random() | |
| }); | |
| circle = new Kinetic.Image({ | |
| image: img, | |
| offset: radius, | |
| x: cdata[i].x, | |
| y: cdata[i].y | |
| }); | |
| circles.push(circle); | |
| layer.add(circle); | |
| } | |
| // Add the layer to the stage. | |
| stage.add(layer); | |
| // Start animation. | |
| startTime = new Date().getTime(); | |
| requestAnimationFrame(step); | |
| function step() { | |
| var c, i, len, time; | |
| for (i = 0, len = count; i < len; i++) { | |
| c = cdata[i]; | |
| if (c.x >= maxX || c.x <= 0) c.vx *= -1; | |
| if (c.y >= maxY || c.y <= 0) c.vy *= -1; | |
| c.x += c.vx; | |
| c.y += c.vy; | |
| circles[i].setX(c.x); | |
| circles[i].setY(c.y); | |
| } | |
| layer.draw(); | |
| if (steps < maxSteps) { | |
| steps++; | |
| requestAnimationFrame(step); | |
| } else { | |
| time = new Date().getTime() - startTime; | |
| updateResults(count, time, maxSteps); | |
| test(); | |
| } | |
| } | |
| } | |
| }); | |
| } | |
| $(function () { | |
| $("#user-agent").text(navigator.userAgent); | |
| test(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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