Commit daa19c0a1f695105c864e5d00c49acff15cccbd9
2021-07-06T16:19:57
Fix alpha setting of WebGL contexts with SwANGLE on MacOS The emulation of the "alpha: false" setting was done with an RGBA format under the hood, which caused some unexpected results, which included non constant alpha values. Replacing GL_BGRA8_EXT with GL_BGRX8_ANGLEX solves this issue. This was discovered while debugging the following test: conformance/context/context-no-alpha-fbo-with-alpha.html but it may fix many other tests (I will update the expectations file after this fix rolls into Chromium) Bug: chromium:1099960 Change-Id: Ib7b2d352a8e920983d3398de28a8c1dde3b97130 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3010579 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Alexis Hétu <sugoi@chromium.org>