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Diffstat (limited to 'testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html')
-rw-r--r-- | testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html new file mode 100644 index 0000000000..1efb24aa9b --- /dev/null +++ b/testing/web-platform/tests/html/canvas/offscreen/the-canvas-state/2d.state.saverestore.globalCompositeOperation.html @@ -0,0 +1,41 @@ +<!DOCTYPE html> +<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> +<title>OffscreenCanvas test: 2d.state.saverestore.globalCompositeOperation</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="/html/canvas/resources/canvas-tests.js"></script> + +<h1>2d.state.saverestore.globalCompositeOperation</h1> +<p class="desc">save()/restore() works for globalCompositeOperation</p> + + +<script> +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(); + +}); +</script> |