1 files changed, 31 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.worker.js b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.worker.js
new file mode 100644
index 0000000000..ede4733a83
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.canvas.worker.js
@@ -0,0 +1,31 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.canvas
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/html/canvas/resources/canvas-tests.js");
+
+var t = async_test("");
+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');
+
+  var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+  var ctx2 = offscreenCanvas2.getContext('2d');
+  ctx2.fillStyle = '#f00';
+  ctx2.fillRect(0, 0, 100, 50);
+  ctx.fillStyle = '#0f0';
+  ctx.fillRect(0, 0, 100, 50);
+  // Avoiding any potential alpha = 0 optimisations.
+  ctx.globalAlpha = 0.01;
+  ctx.drawImage(offscreenCanvas2, 0, 0);
+  _assertPixelApprox(canvas, 50,25, 2,253,0,255, 2);
+  t.done();
+});
+done();