2d.clearRect.globalalpha.html (906B)
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.clearRect.globalalpha</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.clearRect.globalalpha</h1> 10 <p class="desc">clearRect is not affected by globalAlpha</p> 11 12 13 <script> 14 var t = async_test("clearRect is not affected by globalAlpha"); 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 = '#f00'; 25 ctx.fillRect(0, 0, 100, 50); 26 ctx.globalAlpha = 0.1; 27 ctx.clearRect(0, 0, 100, 50); 28 _assertPixel(canvas, 50,25, 0,0,0,0); 29 t.done(); 30 31 }); 32 </script>