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1 <!DOCTYPE html> | |
2 <html> | |
3 <head> | |
4 <style> | |
5 .box { | |
6 position: absolute; | |
7 width: 100px; | |
8 height: 100px; | |
9 margin: 10px; | |
10 background-color: green; | |
11 } | |
12 | |
13 .test { | |
14 -webkit-mask-image: -webkit-canvas(viewport-mask); | |
15 -webkit-mask-position: 50% 50%; | |
16 } | |
17 | |
18 .composited { | |
19 transform: translateZ(0); | |
20 } | |
21 | |
22 .indicator { | |
23 background-color: red; | |
24 } | |
25 | |
26 .outlined { | |
27 outline: 40px solid transparent; | |
28 } | |
29 </style> | |
30 <script> | |
31 if (window.testRunner) | |
32 testRunner.dumpAsTextWithPixelResults(); | |
33 | |
34 function drawMask() | |
35 { | |
36 var canvasWidth = 100; | |
37 var canvasHeight = 100; | |
38 var ctx = document.getCSSCanvasContext('2d', 'viewport-mask', canvasWidth,
canvasHeight) | |
39 ctx.fillStyle = "rgba(0, 0, 0, 1)"; | |
40 ctx.fillRect(0, 0, canvasWidth, canvasHeight); | |
41 } | |
42 | |
43 window.addEventListener('load', drawMask, false); | |
44 </script> | |
45 </head> | |
46 <body> | |
47 <!-- You should see two green boxes side by side, and no red. --> | |
48 <div class="indicator box" style="left: 10px;"></div> | |
49 <div class="indicator box" style="left: 120px;"></div> | |
50 | |
51 <div class="test box" style="left: 10px;"></div> | |
52 <div class="composited test box" style="left: 120px"></div> | |
53 | |
54 <div class="outlined"></div> | |
55 </body> | |
56 </html> | |
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