diff options
Diffstat (limited to 'testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html')
-rw-r--r-- | testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html new file mode 100644 index 0000000000..c064a41cbd --- /dev/null +++ b/testing/web-platform/tests/html/canvas/offscreen/compositing/2d.composite.globalAlpha.range.html @@ -0,0 +1,39 @@ +<!DOCTYPE html> +<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> +<title>OffscreenCanvas test: 2d.composite.globalAlpha.range</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="/html/canvas/resources/canvas-tests.js"></script> + +<h1>2d.composite.globalAlpha.range</h1> +<p class="desc"></p> + + +<script> +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'); + + ctx.globalAlpha = 0.5; + // This may not set it to exactly 0.5 if it is rounded/quantised, so + // remember for future comparisons. + var a = ctx.globalAlpha; + _assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a"); + ctx.globalAlpha = 1.1; + _assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a"); + ctx.globalAlpha = -0.1; + _assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a"); + ctx.globalAlpha = 0; + _assertSame(ctx.globalAlpha, 0, "ctx.globalAlpha", "0"); + ctx.globalAlpha = 1; + _assertSame(ctx.globalAlpha, 1, "ctx.globalAlpha", "1"); + t.done(); + +}); +</script> |