2d.imageData.create2.initial.worker.js (1166B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.imageData.create2.initial 3 // Description:createImageData(sw, sh) returns transparent black data of the right size 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 var t = async_test("createImageData(sw, sh) returns transparent black data of the right size"); 10 var t_pass = t.done.bind(t); 11 var t_fail = t.step_func(function(reason) { 12 throw reason; 13 }); 14 t.step(function() { 15 16 var canvas = new OffscreenCanvas(100, 50); 17 var ctx = canvas.getContext('2d'); 18 19 var imgdata = ctx.createImageData(10, 20); 20 _assertSame(imgdata.data.length, imgdata.width*imgdata.height*4, "imgdata.data.length", "imgdata.width*imgdata.height*4"); 21 _assert(imgdata.width < imgdata.height, "imgdata.width < imgdata.height"); 22 _assert(imgdata.width > 0, "imgdata.width > 0"); 23 var isTransparentBlack = true; 24 for (var i = 0; i < imgdata.data.length; ++i) 25 if (imgdata.data[i] !== 0) 26 isTransparentBlack = false; 27 _assert(isTransparentBlack, "isTransparentBlack"); 28 t.done(); 29 }); 30 done();