1539048 - Support segment rendering for pictures in WR

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, enhancement, P3)

Comment 1

[Glenn Watson [:gw]]

Attachment: Bug 1539048 - Support segment rendering for pictures in WR.

On some low end GPUs, clip mask rendering can be a significant
GPU cost. One way to reduce this is to support segment rendering
on more primitive types, to reduce the size of clip masks.

This patch adds support for pictures that have clip masks and/or
preserve-3d contexts to take part in segment rendering. This
can significantly reduce the number of fragments that must be
drawn into a clip mask for off-screen picture surfaces.

In future, WR can take advantage of segment rendering to use
clip mask shaders that handle only a single corner at a time.
This will be a further significant performance win to clip mask
render time.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d0221689e8e9
Support segment rendering for pictures in WR. r=kvark

Comment 3

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/d0221689e8e9