| <!DOCTYPE html> |
| <title>Canvas test: 2d.transformation.setTransform.skewed</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.transformation.html">transformation</a>.<a href="index.2d.transformation.setTransform.html">setTransform</a>.skewed</h1> |
| <p class="desc"></p> |
| |
| <div class="refs">Spec references: |
| <ul> |
| <li><a href="../annotated-spec/canvas.html#testrefs.2d.transformation.setTransform">2d.transformation.setTransform</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) { |
| |
| // Create green with a red square ring inside it |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.fillStyle = '#f00'; |
| ctx.fillRect(20, 10, 60, 30); |
| ctx.fillStyle = '#0f0'; |
| ctx.fillRect(40, 20, 20, 10); |
| |
| // Draw a skewed shape to fill that gap, to make sure it is aligned correctly |
| ctx.setTransform(1,4, 2,3, 5,6); |
| // Post-transform coordinates: |
| // [[20,10],[80,10],[80,40],[20,40],[20,10],[40,20],[40,30],[60,30],[60,20],[40,20],[20,10]]; |
| // Hence pre-transform coordinates: |
| var pts=[[-7.4,11.2],[-43.4,59.2],[-31.4,53.2],[4.6,5.2],[-7.4,11.2], |
| [-15.4,25.2],[-11.4,23.2],[-23.4,39.2],[-27.4,41.2],[-15.4,25.2], |
| [-7.4,11.2]]; |
| ctx.beginPath(); |
| ctx.moveTo(pts[0][0], pts[0][1]); |
| for (var i = 0; i < pts.length; ++i) |
| ctx.lineTo(pts[i][0], pts[i][1]); |
| ctx.fill(); |
| _assertPixel(canvas, 21,11, 0,255,0,255, "21,11", "0,255,0,255"); |
| _assertPixel(canvas, 79,11, 0,255,0,255, "79,11", "0,255,0,255"); |
| _assertPixel(canvas, 21,39, 0,255,0,255, "21,39", "0,255,0,255"); |
| _assertPixel(canvas, 79,39, 0,255,0,255, "79,39", "0,255,0,255"); |
| _assertPixel(canvas, 39,19, 0,255,0,255, "39,19", "0,255,0,255"); |
| _assertPixel(canvas, 61,19, 0,255,0,255, "61,19", "0,255,0,255"); |
| _assertPixel(canvas, 39,31, 0,255,0,255, "39,31", "0,255,0,255"); |
| _assertPixel(canvas, 61,31, 0,255,0,255, "61,31", "0,255,0,255"); |
| |
| |
| }); |
| </script> |
| |
