2d.imageData.create1.initial.html (1464B)
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>OffscreenCanvas test: 2d.imageData.create1.initial</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 9 <h1>2d.imageData.create1.initial</h1> 10 <p class="desc">createImageData(imgdata) returns transparent black data of the right size</p> 11 12 13 <script> 14 var t = async_test("createImageData(imgdata) returns transparent black data of the right size"); 15 var t_pass = t.done.bind(t); 16 var t_fail = t.step_func(function(reason) { 17 throw reason; 18 }); 19 t.step(function() { 20 21 var canvas = new OffscreenCanvas(100, 50); 22 var ctx = canvas.getContext('2d'); 23 24 ctx.fillStyle = '#0f0'; 25 ctx.fillRect(0, 0, 100, 50); 26 var imgdata1 = ctx.getImageData(0, 0, 10, 20); 27 var imgdata2 = ctx.createImageData(imgdata1); 28 _assertSame(imgdata2.data.length, imgdata1.data.length, "imgdata2.data.length", "imgdata1.data.length"); 29 _assertSame(imgdata2.width, imgdata1.width, "imgdata2.width", "imgdata1.width"); 30 _assertSame(imgdata2.height, imgdata1.height, "imgdata2.height", "imgdata1.height"); 31 var isTransparentBlack = true; 32 for (var i = 0; i < imgdata2.data.length; ++i) 33 if (imgdata2.data[i] !== 0) 34 isTransparentBlack = false; 35 _assert(isTransparentBlack, "isTransparentBlack"); 36 t.done(); 37 38 }); 39 </script>