| <!DOCTYPE html> |
| <title>Canvas test: 2d.composite.globalAlpha.canvas</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.composite.html">composite</a>.<a href="index.2d.composite.globalAlpha.html">globalAlpha</a>.canvas</h1> |
| <p class="desc"></p> |
| |
| <div class="refs">Spec references: |
| <ul> |
| <li><a href="../annotated-spec/canvas.html#testrefs.2d.composite.globalAlpha.image">2d.composite.globalAlpha.image</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> |
| <p class="output expectedtext">Expected output:<p><img src="../resources/green-100x50.png" class="output expected" id="expected" alt=""> |
| <ul id="d"></ul> |
| <script> |
| _addTest(function(canvas, ctx) { |
| |
| var canvas2 = document.createElement('canvas'); |
| canvas2.width = 100; |
| canvas2.height = 50; |
| var ctx2 = canvas2.getContext('2d'); |
| ctx2.fillStyle = '#f00'; |
| ctx2.fillRect(0, 0, 100, 50); |
| |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations |
| ctx.drawImage(canvas2, 0, 0); |
| _assertPixelApprox(canvas, 50,25, 2,253,0,255, "50,25", "2,253,0,255", 2); |
| |
| |
| }); |
| </script> |
| |
