2d.imageData.put.unchanged.html (1541B)
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.imageData.put.unchanged</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.imageData.put.unchanged</h1> 12 <p class="desc">putImageData(getImageData(...), ...) has no effect</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 18 <ul id="d"></ul> 19 <script> 20 var t = async_test("putImageData(getImageData(...), ...) has no effect"); 21 _addTest(function(canvas, ctx) { 22 23 var i = 0; 24 for (var y = 0; y < 16; ++y) { 25 for (var x = 0; x < 16; ++x, ++i) { 26 ctx.fillStyle = 'rgba(' + i + ',' + (Math.floor(i*1.5) % 256) + ',' + (Math.floor(i*23.3) % 256) + ',' + (i/256) + ')'; 27 ctx.fillRect(x, y, 1, 1); 28 } 29 } 30 var imgdata1 = ctx.getImageData(0.1, 0.2, 15.8, 15.9); 31 var olddata = []; 32 for (var i = 0; i < imgdata1.data.length; ++i) 33 olddata[i] = imgdata1.data[i]; 34 35 ctx.putImageData(imgdata1, 0.1, 0.2); 36 37 var imgdata2 = ctx.getImageData(0.1, 0.2, 15.8, 15.9); 38 for (var i = 0; i < imgdata2.data.length; ++i) { 39 _assertSame(olddata[i], imgdata2.data[i], "olddata[\""+(i)+"\"]", "imgdata2.data[\""+(i)+"\"]"); 40 } 41 42 }); 43 </script>