| <!DOCTYPE html> |
| <title>Canvas test: 2d.imageData.put.unchanged</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.put.html">put</a>.unchanged</h1> |
| <p class="desc">putImageData(getImageData(...), ...) has no effect</p> |
| |
| <div class="refs">Spec references: |
| <ul> |
| <li><a href="../annotated-spec/canvas.html#testrefs.2d.imageData.unchanged">2d.imageData.unchanged</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) { |
| |
| var i = 0; |
| for (var y = 0; y < 16; ++y) { |
| for (var x = 0; x < 16; ++x, ++i) { |
| ctx.fillStyle = 'rgba(' + i + ',' + (Math.floor(i*1.5) % 256) + ',' + (Math.floor(i*23.3) % 256) + ',' + (i/256) + ')'; |
| ctx.fillRect(x, y, 1, 1); |
| } |
| } |
| var imgdata1 = ctx.getImageData(0.1, 0.2, 15.8, 15.9); |
| var olddata = []; |
| for (var i = 0; i < imgdata1.data.length; ++i) |
| olddata[i] = imgdata1.data[i]; |
| |
| ctx.putImageData(imgdata1, 0.1, 0.2); |
| |
| var imgdata2 = ctx.getImageData(0.1, 0.2, 15.8, 15.9); |
| for (var i = 0; i < imgdata2.data.length; ++i) { |
| _assertSame(olddata[i], imgdata2.data[i], "olddata[\""+(i)+"\"]", "imgdata2.data[\""+(i)+"\"]"); |
| } |
| |
| |
| }); |
| </script> |
| |
