Re: [2dcontext-tests] Upstream 2d.gradient.interpolate.colouralpha from WebKit (#3458)

We could have used a larger tolerance, but this uses more accurate math instead. The values used were just not very accurate, this caused a problem for Blink as well back in the day (see https://bugs.webkit.org/show_bug.cgi?id=77550). WebKit on Sierra now uses a more accurate backend for gradients, so we're updating this test to use more accurate values which pass, per my testing, on Firefox, Chrome, Safari on Sierra and previous OSs.

View on GitHub: https://github.com/w3c/web-platform-tests/pull/3458#issuecomment-239435783

Received on Friday, 12 August 2016 12:41:48 UTC