| // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. |
| // OffscreenCanvas test in a worker:2d.composite.uncovered.nocontext.destination-atop |
| // Description:drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged. |
| // Note: |
| |
| importScripts("/resources/testharness.js"); |
| importScripts("/html/canvas/resources/canvas-tests.js"); |
| |
| var t = async_test("drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged."); |
| var t_pass = t.done.bind(t); |
| var t_fail = t.step_func(function(reason) { |
| throw reason; |
| }); |
| t.step(function() { |
| |
| var canvas = new OffscreenCanvas(100, 50); |
| var ctx = canvas.getContext('2d'); |
| |
| |
| ctx.fillStyle = 'rgba(0, 255, 255, 0.5)'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.globalCompositeOperation = 'destination-atop'; |
| var offscreenCanvas2 = new OffscreenCanvas(100, 50); |
| ctx.drawImage(offscreenCanvas2, 0, 0); |
| _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5); |
| t.done(); |
| |
| }); |
| done(); |