On graphics branch, chrome process content become black or flickering.

It seemed to caused by a conflict of Bug 1339625 fix and Bug 1337885 fix. On Bug 1339625, we did not change to ContentClientDoubleBuffered and keep ContentClientSingleBuffered usage. Further, release TextureHost to unlock read lock. But there could be a case that WebRenderPaintedLayer is recompositted without repaint. Bug 1337885 fix seemed to make it very often.

We did not choose ContentClientDoubleBuffered to not increase memory usage, since rendering of ExternalImage is not optimum. But since this bug, we could not avoid temporary memory usage increase. The increase could be addressed when we have optimum ExternalImage rendering path.

Bug 1340953 is created for reducing memory usage of WebRenderPaintedLayer.

I think this is the same as bug 1340798

Even with double buffering, reftest orange did not addressed. https://treeherder.mozilla.org/#/jobs?repo=try&revision=0bef014e6932d1be93922071260e8fbd7158ce29

(In reply to Sotaro Ikeda [:sotaro] from comment #6) > Even with double buffering, reftest orange did not addressed. > > https://treeherder.mozilla.org/#/ > jobs?repo=try&revision=0bef014e6932d1be93922071260e8fbd7158ce29 From bug 1340798 comment10, oranges were caused by Bug 1337885.

(In reply to (away until Feb21) Kartikaya Gupta (email:kats@mozilla.com) from comment #5) > I think this is the same as bug 1340798 By bug 1340798 comment10, this bug is different than bug 1340798.

bug 1337885 was backed out, then the flickering does not happen now. But it is necessary for bug 1337885.

Comment on attachment 8839038 [details] [diff] [review] patch - Enable double buffering on WebRenderPaintedLayer Review of attachment 8839038 [details] [diff] [review]: ----------------------------------------------------------------- I think that in today's meeting you and Morris talked about using ImageClient/Host for content. Does it affect this patch?

Comment on attachment 8839038 [details] [diff] [review] patch - Enable double buffering on WebRenderPaintedLayer It becomes not necessary

(In reply to Sotaro Ikeda [:sotaro] from comment #11) > Comment on attachment 8839038 [details] [diff] [review] > patch - Enable double buffering on WebRenderPaintedLayer > > It becomes not necessary By Bug 1341001.