Import wpt@5915964199b07226bf6d8fbb177a63b1f272907a

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/pixel-manipulation/2d.imageData.get.source.negative.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.imageData.get.source.negative
+// Description:getImageData() works with negative width and height, and returns top-to-bottom left-to-right
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("getImageData() works with negative width and height, and returns top-to-bottom left-to-right");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+ctx.fillStyle = '#000';
+ctx.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#fff';
+ctx.fillRect(20, 10, 60, 10);
+var imgdata1 = ctx.getImageData(85, 25, -10, -10);
+_assertSame(imgdata1.data[0], 255, "imgdata1.data[\""+(0)+"\"]", "255");
+_assertSame(imgdata1.data[1], 255, "imgdata1.data[\""+(1)+"\"]", "255");
+_assertSame(imgdata1.data[2], 255, "imgdata1.data[\""+(2)+"\"]", "255");
+_assertSame(imgdata1.data[3], 255, "imgdata1.data[\""+(3)+"\"]", "255");
+_assertSame(imgdata1.data[imgdata1.data.length-4+0], 0, "imgdata1.data[imgdata1.data.length-4+0]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+1], 0, "imgdata1.data[imgdata1.data.length-4+1]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+2], 0, "imgdata1.data[imgdata1.data.length-4+2]", "0");
+_assertSame(imgdata1.data[imgdata1.data.length-4+3], 255, "imgdata1.data[imgdata1.data.length-4+3]", "255");
+var imgdata2 = ctx.getImageData(0, 0, -1, -1);
+_assertSame(imgdata2.data[0], 0, "imgdata2.data[\""+(0)+"\"]", "0");
+_assertSame(imgdata2.data[1], 0, "imgdata2.data[\""+(1)+"\"]", "0");
+_assertSame(imgdata2.data[2], 0, "imgdata2.data[\""+(2)+"\"]", "0");
+_assertSame(imgdata2.data[3], 0, "imgdata2.data[\""+(3)+"\"]", "0");
+
+t.done();
+
+});
+done();