feat(capture_webrender): write webrender revision into text
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Relates to https://github.com/servo/servo/pull/20315#issuecomment-373819735.
This PR try to generate `wr.txt` when trigger webrender capture. By reading gecko's implementation at [here](3b8e63c66a/gfx/doc/README.webrender (L53)), it seems gecko's build script generates txt file for containing revision of webrender and read it each time trigger capturing.
In this PR tries to similar in cruxwise with small differences:
- `cargo build` reads `cargo.lock`, export it into `${OUT_DIR}/`, included via macro in build time.
- when capturing triggered, those revision will be written as `wr.txt`.
Probably point of discussion & need to be updated in PR if necessary:
~- Is it acceptable `mach` generates module file on build bootstrapping? Should there be other recommendation?~ Now cargo build takes care of generation.
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This trades quite a bit of complicated code in Servo for few more
messages and a significant performance improvement. In particular,
WebRender can search the entire display list at once instead of
ping-ponging down the pipeline tree. This allows us to send mouse
events to the correct pipeline immediately.
* Add support for clip masks on text runs.
* Fix atomic ordering of items with multiple shadows.
* Update to bincode + ipc-channel with optimizations.
* Fix some plane splitting precision errors.
* Improve the anti-aliasing quality significantly.
* Add internal ClipChain support.
* Fix diacritic glyphs on Linux.
Sometimes clippy gets outdated by months, and its current support setup
means that each Servo component need to opt into it by depending on
the plugins crate manually, and not all components do that.
This removes paint threads, rust-layers dependency, and changes
optional webrender types to be required.
The use_webrender option has been removed, however I've left
the "-w" command line option in place so that wpt
runner can continue to pass that. Once it's removed from there
we can also remove the -w option.
Once this stage is complete, it should be fine to change the
display list building code to generate webrender display
lists directly and avoid the conversion step.
