1582210 - Support splitting blob images into different sizes

Status: RESOLVED FIXED

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

Description

[Jeff Muizelaar [:jrmuizel]]

Currently if we split a blob image the first image gets the same size as the subsequent image. It would be quite beneficial to performance to instead have blob images sized to the bounds of the items that they contain.

Comment 2

[Jeff Muizelaar [:jrmuizel]]

The basic idea here would be to just union the BlobItemData.mRects for a given group and then intersect this rectangle with initial visible rect and use the result as the visible rect for the blob.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

Attachment: Bug 1582210. Support splitting blob images into different sizes.

This makes things better especially when the bounds of the combined blob
is changing but the bound of the separate ones are not.

The current implementation is a bit ugly, but it's simple and
can be cleaned up in the cleanups I have in mind for the future.

Comment 4

[Jeff Muizelaar [:jrmuizel]]

Looks like there's a bug https://treeherder.mozilla.org/#/jobs?repo=try&revision=2bc4ab89de144c537aea9d360474e0c7fa0bb4a5&selectedJob=269523542

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/4c696f6996de
Support splitting blob images into different sizes. r=nical

Comment 6

[Cristina Coroiu [:ccoroiu]]

https://hg.mozilla.org/mozilla-central/rev/4c696f6996de