1593154 - Fix semantics of partial present API for webrender.

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect)

Comment 1

[Glenn Watson [:gw]]

Attachment: Bug 1593154 - Fix semantics of partial present API for webrender.

• When partial present is not valid, ensure that a single dirty
  rect the entire size of the framebuffer is returned.
• Ensure that we never return an empty dirty rect. If nothing is
  dirty, the returned dirty rects array is empty, which can be
  used by the client to completely skip calling Present.
• Remove partial present Multi mode (for now). This mode has
  some issues with overlapping tiles which can be resolved as
  a follow up.

This should allow enabling partial present for a single dirty rect,
which covers most common cases. We can re-implement the more
complicated Multi partial present mode if / when we find pages
where supporting multiple partial present rects is a good win.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/9c9fffed78e5
Fix semantics of partial present API for webrender. r=sotaro

Comment 3

[Bogdan Tara[:bogdan_tara | bogdant]]

https://hg.mozilla.org/mozilla-central/rev/9c9fffed78e5