7bd2ec1585
When rendering text in webrender we rasterize glyphs either in local space at a chosen raster scale, or in device space taking in to account to text's transform. We are not able to rasterize glyphs larger than a certain size, however. So if the device-space font size exceeds this limit, then currently we force the glyph to be rasterized in local space, at the untransformed font size. This must then be scaled by the shader when rendering text, and at high zoom levels this will result in blurry text. This change makes it so that rather than rasterizing at the untransformed font size we rasterize at the font size limit. This will mean the glyphs are rasterized at a larger size and will therefore require less scaling, meaning they will appear less blurry. Differential Revision: https://phabricator.services.mozilla.com/D37644 --HG-- extra : moz-landing-system : lando |
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.. | ||
ci-scripts | ||
debugger | ||
direct-composition | ||
examples | ||
peek-poke | ||
webrender | ||
webrender_api | ||
webrender_build | ||
wr_malloc_size_of | ||
wrench | ||
.gitignore | ||
.taskcluster.yml | ||
appveyor.yml | ||
Cargo.lock | ||
Cargo.toml | ||
LICENSE | ||
README.md | ||
rustfmt.toml | ||
servo-tidy.toml |
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.