Import wpt@5915964199b07226bf6d8fbb177a63b1f272907a

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/pixel-manipulation/2d.imageData.create1.initial.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.create1.initial
+// Description:createImageData(imgdata) returns transparent black data of the right size
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("createImageData(imgdata) returns transparent black data of the right size");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+ctx.fillStyle = '#0f0';
+ctx.fillRect(0, 0, 100, 50);
+var imgdata1 = ctx.getImageData(0, 0, 10, 20);
+var imgdata2 = ctx.createImageData(imgdata1);
+_assertSame(imgdata2.data.length, imgdata1.data.length, "imgdata2.data.length", "imgdata1.data.length");
+_assertSame(imgdata2.width, imgdata1.width, "imgdata2.width", "imgdata1.width");
+_assertSame(imgdata2.height, imgdata1.height, "imgdata2.height", "imgdata1.height");
+var isTransparentBlack = true;
+for (var i = 0; i < imgdata2.data.length; ++i)
+    if (imgdata2.data[i] !== 0)
+        isTransparentBlack = false;
+_assert(isTransparentBlack, "isTransparentBlack");
+
+t.done();
+
+});
+done();