2d.composite.uncovered.nocontext.copy.html (1454B)
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.uncovered.nocontext.copy</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.uncovered.nocontext.copy</h1> 12 <p class="desc">drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.</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="2d.composite.uncovered.nocontext.copy.png" class="output expected" id="expected" alt=""> 18 <ul id="d"></ul> 19 <script> 20 var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged."); 21 _addTest(function(canvas, ctx) { 22 23 ctx.fillStyle = 'rgba(0, 255, 255, 0.5)'; 24 ctx.fillRect(0, 0, 100, 50); 25 ctx.globalCompositeOperation = 'copy'; 26 const canvas2 = document.createElement('canvas'); 27 canvas2.width = canvas.width; 28 canvas2.height = canvas.height; 29 ctx.drawImage(canvas2, 0, 0); 30 _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5); 31 32 }); 33 </script>