1687863 - Refactor picture cache barriers and scroll bar slice code

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, task)

Comment 1

[Glenn Watson [:gw]]

Attachment: Bug 1687863 - Refactor picture cache barriers and scroll bar slice code.

Instead of keeping a stacking context around for scrollbar containers,
extend and use the tile cache barrier code to create them. This
removes the final remaining code path that creates pass through
picture primitives.

The tile cache barrier changes also form the basis of how we will
make blend containers and backdrop roots work in a follow up patch.

Blend containers and backdrop roots will become redundant stacking
contexts when they exist at the start of a tile cache, which will
save an entire off-screen surface / constant invalidation.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/924c7f7be41d
Refactor picture cache barriers and scroll bar slice code. r=nical

Comment 3

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/924c7f7be41d