2d.composite.globalAlpha.canvascopy.html (1308B)
1 <!DOCTYPE html> 2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> 3 <meta charset="UTF-8"> 4 <title>Canvas test: 2d.composite.globalAlpha.canvascopy</title> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <script src="/html/canvas/resources/canvas-tests.js"></script> 8 <link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css"> 9 <body class="show_output"> 10 11 <h1>2d.composite.globalAlpha.canvascopy</h1> 12 <p class="desc"></p> 13 14 15 <p class="output">Actual output:</p> 16 <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas> 17 <p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt=""> 18 <ul id="d"></ul> 19 <script> 20 var t = async_test(""); 21 _addTest(function(canvas, ctx) { 22 23 var canvas2 = document.createElement('canvas'); 24 canvas2.width = 100; 25 canvas2.height = 50; 26 var ctx2 = canvas2.getContext('2d'); 27 ctx2.fillStyle = '#0f0'; 28 ctx2.fillRect(0, 0, 100, 50); 29 30 ctx.fillStyle = '#f00'; 31 ctx.fillRect(0, 0, 100, 50); 32 33 ctx.globalCompositeOperation = 'copy' 34 ctx.globalAlpha = 0.51; 35 ctx.drawImage(canvas2, 0, 0); 36 _assertPixelApprox(canvas, 50,25, 0,255,0,130, 2); 37 38 }); 39 </script>