Import wpt@3c8896ae408c8fd594979da7c99970029e7856a7

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/drawing-images-to-the-canvas/2d.drawImage.negativedest.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.drawImage.negativedest
+// Description:Negative destination width/height represents the correct rectangle
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("Negative destination width/height represents the correct rectangle");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+var promise = new Promise(function(resolve, reject) {
+    var xhr = new XMLHttpRequest();
+    xhr.open("GET", '/images/ggrr-256x256.png');
+    xhr.responseType = 'blob';
+    xhr.send();
+    xhr.onload = function() {
+        resolve(xhr.response);
+    };
+});
+promise.then(function(response) {
+    ctx.drawImage(response, 100, 78, 50, 50, 0, 50, 50, -50);
+    ctx.drawImage(response, 100, 128, 50, -50, 100, 50, -50, -50);
+    _assertPixelApprox(offscreenCanvas, 1,1, 0,255,0,255, "1,1", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 1,48, 0,255,0,255, "1,48", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 98,1, 0,255,0,255, "98,1", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 98,48, 0,255,0,255, "98,48", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 48,1, 0,255,0,255, "48,1", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 48,48, 0,255,0,255, "48,48", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 51,1, 0,255,0,255, "51,1", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 51,48, 0,255,0,255, "51,48", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 25,25, 0,255,0,255, "25,25", "0,255,0,255", 2);
+    _assertPixelApprox(offscreenCanvas, 75,25, 0,255,0,255, "75,25", "0,255,0,255", 2);
+});
+
+t.done();
+
+});
+done();