2d.state.saverestore.globalCompositeOperation.worker.js

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.worker.html - WPT Dashboard Interop Dashboard

// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.

// OffscreenCanvas test in a worker:2d.state.saverestore.globalCompositeOperation

// Description:save()/restore() works for globalCompositeOperation

// Note:

importScripts("/resources/testharness.js");

importScripts("/html/canvas/resources/canvas-tests.js");

var t = async_test("save()/restore() works for globalCompositeOperation");

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');

  // Test that restore() undoes any modifications

  var old = ctx.globalCompositeOperation;

  ctx.save();

  ctx.globalCompositeOperation = "copy";

  ctx.restore();

  _assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");

  // Also test that save() doesn't modify the values

  ctx.globalCompositeOperation = "copy";

  old = ctx.globalCompositeOperation;

      // we're not interested in failures caused by get(set(x)) != x (e.g.

      // from rounding), so compare against 'old' instead of against "copy"

  ctx.save();

  _assertSame(ctx.globalCompositeOperation, old, "ctx.globalCompositeOperation", "old");

  ctx.restore();

  t.done();

});

done();