2d.canvas.host.initial.reset.same.html (1018B)
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.canvas.host.initial.reset.same</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.canvas.host.initial.reset.same</h1> 10 <p class="desc">Setting size (not changing the value) resets canvas to transparent black</p> 11 12 13 <script> 14 var t = async_test("Setting size (not changing the value) resets canvas to transparent black"); 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 canvas.width = 100; 25 ctx.fillStyle = '#f00'; 26 ctx.fillRect(0, 0, 50, 50); 27 _assertPixel(canvas, 20,20, 255,0,0,255); 28 canvas.width = 100; 29 _assertPixel(canvas, 20,20, 0,0,0,0); 30 t.done(); 31 32 }); 33 </script>