| // DO NOT EDIT! This test has been generated by tools/gentest.py. |
| // OffscreenCanvas test in a worker:2d.composite.uncovered.image.destination-atop |
| // Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged. |
| // Note: |
| |
| importScripts("/resources/testharness.js"); |
| importScripts("/2dcontext/resources/canvas-tests.js"); |
| |
| var t = async_test("drawImage() draws pixels not covered by the source object 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 offscreenCanvas = new OffscreenCanvas(100, 50); |
| var ctx = offscreenCanvas.getContext('2d'); |
| |
| |
| ctx.fillStyle = 'rgba(0, 255, 255, 0.5)'; |
| ctx.fillRect(0, 0, 100, 50); |
| ctx.globalCompositeOperation = 'destination-atop'; |
| var promise = new Promise(function(resolve, reject) { |
| var xhr = new XMLHttpRequest(); |
| xhr.open("GET", '/images/yellow.png'); |
| xhr.responseType = 'blob'; |
| xhr.send(); |
| xhr.onload = function() { |
| resolve(xhr.response); |
| }; |
| }); |
| promise.then(function(response) { |
| createImageBitmap(response).then(bitmap => { |
| ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10); |
| _assertPixelApprox(offscreenCanvas, 15,15, 0,0,0,0, "15,15", "0,0,0,0", 5); |
| _assertPixelApprox(offscreenCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5); |
| }, t_fail); |
| }).then(t_pass, t_fail); |
| |
| }); |
| done(); |