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Previously, additional dependencies (such as opacity bindings and transforms) were stored in a simple hash set, which meant they could not be correlated with primitive bounding rects (and thus could not be used to derive dirty rects of a tile). Now, by scanning the primitive list which contains the bounding rect, we can also find additional dependencies for that primitive. This will be used in future to create exact dirty rects (for debugging / regression testing) and allow us to generate a dependency descriptor for a split or merged tile from an existing descriptor. This patch also fixes a case where opacity bindings could result in unnecessary invalidations, by retaining the opacity bindings state across display lists. Differential Revision: https://phabricator.services.mozilla.com/D42473 --HG-- extra : moz-landing-system : lando
WebRender
GPU renderer for the Web content, used by Servo.
Note that the canonical home for this code is in gfx/wr folder of the mozilla-central repository at https://hg.mozilla.org/mozilla-central. The Github repository at https://github.com/servo/webrender should be considered a downstream mirror, although it contains additional metadata (such as Github wiki pages) that do not exist in mozilla-central. Pull requests against the Github repository are still being accepted, although once reviewed, they will be landed on mozilla-central first and then mirrored back. If you are familiar with the mozilla-central contribution workflow, filing bugs in Bugzilla and submitting patches there would be preferred.
Update as a Dependency
After updating shaders in WebRender, go to servo and:
- Go to the servo directory and do ./mach update-cargo -p webrender
- Create a pull request to servo
Use WebRender with Servo
To use a local copy of WebRender with servo, go to your servo build directory and:
- Edit Cargo.toml
- Add at the end of the file:
[patch."https://github.com/servo/webrender"]
"webrender" = { path = "<path>/webrender" }
"webrender_api" = { path = "<path>/webrender_api" }
where <path> is the path to your local copy of WebRender.
- Build as normal
Documentation
The Wiki has a few pages describing the internals and conventions of WebRender.
Testing
Tests run using OSMesa to get consistent rendering across platforms.
Still there may be differences depending on font libraries on your system, for example.
See this gist for how to make the text tests useful in Fedora, for example.