| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| canvas { |
| width: 100px; |
| height: 100px; |
| background-color: red; |
| } |
| </style> |
| </head> |
| <body> |
| <canvas id="canvas1"></canvas> |
| <canvas id="canvas2"></canvas> |
| <script> |
| if (window.testRunner) |
| window.testRunner.dumpAsText(); |
| |
| var iOSPlatform = navigator.userAgent.search(/\biPhone OS\b/) != -1; |
| var OSXYosemiteOrOlder = navigator.userAgent.search(/\bMac OS X 10_(8|9|10)(_[0-9]+)?\b/) != -1; |
| var MAX_WIDTH = iOSPlatform ? Math.pow(2, 12) : (OSXYosemiteOrOlder ? Math.pow(2, 13) : Math.pow(2, 14)); |
| var MAX_HEIGHT = MAX_WIDTH; |
| |
| function fillCanvas(id, width, height) { |
| var canvas = document.getElementById(id); |
| canvas.width = width; |
| canvas.height = height; |
| |
| var ctx = canvas.getContext("2d"); |
| |
| ctx.fillStyle = "lime"; |
| ctx.fillRect(0, 0, width, height); |
| } |
| |
| fillCanvas("canvas1", MAX_WIDTH, MAX_HEIGHT); |
| fillCanvas("canvas2", MAX_WIDTH + 1, MAX_HEIGHT); |
| </script> |
| </body> |
| </html> |
