2d.imageData.get.order.alpha.worker.js (872B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.imageData.get.order.alpha 3 // Description:getImageData() returns A in the fourth component 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 var t = async_test("getImageData() returns A in the fourth component"); 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 ctx.fillStyle = 'rgba(0, 0, 0, 0.5)'; 20 ctx.fillRect(0, 0, 100, 50); 21 var imgdata = ctx.getImageData(0, 0, 10, 10); 22 _assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200"); 23 _assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100"); 24 t.done(); 25 }); 26 done();