| <!DOCTYPE html> |
| <title>Canvas test: 2d.clearRect.negative</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.clearRect.html">clearRect</a>.negative</h1> |
| <p class="desc">clearRect of negative sizes works</p> |
| |
| <div class="refs">Spec references: |
| <ul> |
| <li><a href="../annotated-spec/canvas.html#testrefs.2d.clearRect">2d.clearRect</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/clear-100x50.png" class="output expected" id="expected" alt=""> |
| <ul id="d"></ul> |
| <script> |
| _addTest(function(canvas, ctx) { |
| |
| ctx.fillStyle = '#f00'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.clearRect(0, 0, 50, 25); |
| ctx.clearRect(100, 0, -50, 25); |
| ctx.clearRect(0, 50, 50, -25); |
| ctx.clearRect(100, 50, -50, -25); |
| _assertPixel(canvas, 25,12, 0,0,0,0, "25,12", "0,0,0,0"); |
| _assertPixel(canvas, 75,12, 0,0,0,0, "75,12", "0,0,0,0"); |
| _assertPixel(canvas, 25,37, 0,0,0,0, "25,37", "0,0,0,0"); |
| _assertPixel(canvas, 75,37, 0,0,0,0, "75,37", "0,0,0,0"); |
| |
| |
| }); |
| </script> |
| |
