90a55d388c
There are a number of issues with the current gradient dithering implementation, that cause many test failures and also fuzziness rendering when enabling DirectComposition virtual surfaces. In particular, the dither result is dependent on the offset of the update rect within a render target. For now, this patch disables gradient dithering by default. This gives us: - A heap of new test PASS results (or reduced fuzziness). - Fixes a number of non-deterministic fuzziness bugs with DC. - Improves performance of gradient rendering by a reasonable amount. We can fix gradient dithering as a follow up, and re-enable if/when we find content that would benefit from it significantly (we may be able to improve gradients in other ways than dithering too). Differential Revision: https://phabricator.services.mozilla.com/D60460 --HG-- extra : moz-landing-system : lando |
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| .. | ||
| ci-scripts | ||
| debugger | ||
| direct-composition | ||
| example-compositor | ||
| examples | ||
| peek-poke | ||
| tileview | ||
| webrender | ||
| webrender_api | ||
| webrender_build | ||
| wr_malloc_size_of | ||
| wrench | ||
| .gitignore | ||
| .taskcluster.yml | ||
| Cargo.lock | ||
| Cargo.toml | ||
| LICENSE | ||
| README.md | ||
| appveyor.yml | ||
| rustfmt.toml | ||
| servo-tidy.toml | ||
README.md
WebRender
WebRender is a GPU-based 2D rendering engine written in Rust. Firefox, the research web browser Servo, and other GUI frameworks draw with it. It currently uses the OpenGL API internally.
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.