| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| .box { |
| position: absolute; |
| width: 100px; |
| height: 100px; |
| margin: 10px; |
| background-color: green; |
| } |
| |
| .test { |
| -webkit-mask-image: -webkit-canvas(viewport-mask); |
| -webkit-mask-position: 50% 50%; |
| } |
| |
| .composited { |
| -webkit-transform: translateZ(0); |
| } |
| |
| .indicator { |
| background-color: red; |
| } |
| |
| .outlined { |
| outline: 40px solid transparent; |
| } |
| </style> |
| <script> |
| if (window.testRunner) |
| testRunner.dumpAsText(true); |
| |
| function drawMask() |
| { |
| var canvasWidth = 100; |
| var canvasHeight = 100; |
| var ctx = document.getCSSCanvasContext('2d', 'viewport-mask', canvasWidth, canvasHeight) |
| ctx.fillStyle = "rgba(0, 0, 0, 1)"; |
| ctx.fillRect(0, 0, canvasWidth, canvasHeight); |
| } |
| |
| window.addEventListener('load', drawMask, false); |
| </script> |
| </head> |
| <body> |
| <!-- You should see two green boxes side by side, and no red. --> |
| <div class="indicator box" style="left: 10px;"></div> |
| <div class="indicator box" style="left: 120px;"></div> |
| |
| <div class="test box" style="left: 10px;"></div> |
| <div class="composited test box" style="left: 120px"></div> |
| |
| <div class="outlined"></div> |
| </body> |
| </html> |
