| <!DOCTYPE html> |
| <title>Canvas test: 2d.imageData.get.order.alpha</title> |
| <meta name="author" content="Philip Taylor"> |
| <script src="../common/canvas-tests.js"></script> |
| <link rel="stylesheet" href="../common/canvas-tests.css"> |
| <body class="show_output"> |
| |
| <h1><a href="index.2d.html">2d</a>.<a href="index.2d.imageData.html">imageData</a>.<a href="index.2d.imageData.get.html">get</a>.<a href="index.2d.imageData.get.order.html">order</a>.alpha</h1> |
| <p class="desc">getImageData() returns A in the fourth component</p> |
| |
| <div class="refs">Spec references: |
| <ul> |
| <li><a href="../annotated-spec/canvas.html#testrefs.2d.pixelarray.order">2d.pixelarray.order</a> |
| </ul> |
| </div> |
| |
| <p class="output">Actual output:</p> |
| <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> |
| |
| <ul id="d"></ul> |
| <script> |
| _addTest(function(canvas, ctx) { |
| |
| ctx.fillStyle = 'rgba(0, 0, 0, 0.5)'; |
| ctx.fillRect(0, 0, 100, 50); |
| var imgdata = ctx.getImageData(0, 0, 10, 10); |
| _assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200"); |
| _assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100"); |
| |
| |
| }); |
| </script> |
| |
