| <pre id="console"></pre> |
| <script> |
| function log(message) |
| { |
| document.getElementById("console").appendChild(document.createTextNode(message + "\n")); |
| } |
| |
| if (!window.testRunner) |
| log("This test requires WebKitTestRunner or DumpRenderTree."); |
| |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| |
| var canvas = document.createElement("canvas"); |
| canvas.width = 8; |
| canvas.height = 8; |
| |
| var context = canvas.getContext("2d"); |
| var cssContext = document.getCSSCanvasContext("2d", "test", 8, 8); |
| |
| if (context.webkitBackingStorePixelRatio !== 1) |
| log("FAIL: expected webkitBackingStorePixelRatio of 1, was " + context.webkitBackingStorePixelRatio + "."); |
| |
| testRunner.setBackingScaleFactor(2, function() { |
| var testCanvas = document.createElement("canvas"); |
| var testContext = testCanvas.getContext("2d"); |
| |
| if (testContext.webkitBackingStorePixelRatio === 2) { |
| log("Testing webkitBackingStorePixelRatio after resize"); |
| |
| function assertPixelRatio(context, expected) |
| { |
| if (context.webkitBackingStorePixelRatio === expected) |
| log("PASS: webkitBackingStorePixelRatio is " + expected + "."); |
| else |
| log("FAIL: webkitBackingStorePixelRatio is " + context.webkitBackingStorePixelRatio + ", expected " + expected + "."); |
| } |
| |
| assertPixelRatio(context, 1); |
| |
| canvas.width = 8; |
| canvas.height = 8; |
| |
| assertPixelRatio(context, 2); |
| |
| assertPixelRatio(cssContext, 1); |
| |
| cssContext = document.getCSSCanvasContext("2d", "test", 8, 8); |
| |
| assertPixelRatio(cssContext, 2); |
| } else |
| log("High-DPI canvas is not enabled."); |
| |
| testRunner.notifyDone(); |
| }); |
| </script> |