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a27c62717e
Moved Canvas rendering to a single thread. <!-- Please describe your changes on the following line: --> Implements the "Subsequent Steps" part of the [NCSU Canvas rendering project.](https://github.com/servo/servo/wiki/Canvas-rendering-project) I moved most of the functionality from CanvasPaintThread to CanvasData, so CanvasPaintThread essentially just pulls the info out of the message and calls a method on a particular CanvasData element. I ran into some awkwardness with the fact that one can only take a single mutable reference from a hashmap, though. DrawImageInOther is not really possible to do with only one reference at a time, so it awkwardly still lives in CanvasPaintThread, basically. I also would've preferred to take the reference at the top as soon as I get the CanvasId, since that looks cleaner than having them all start with "canvas_paint_thread.canvases.get_mut[&canvas_id].unwrap()" but that makes trying to take the second reference for DrawImageInOther fail to compile. I'm definitely open to suggestions on how to make that less gross. The timed single-canvas drawing improved in performance from around ~2.2ms to around ~1.7ms. Slither.io runs better and doesn't crash, but I'm not having it crash on my copy from before these changes, so I don't know if that's new behavior or not. --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach build-geckolib` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #13879 and #10381. <!-- Either: --> - [X] There are tests for these changes (added in the initial steps) <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/20680) <!-- Reviewable:end --> |
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| .. | ||
| docs | ||
| dom | ||
| task_source | ||
| body.rs | ||
| build.rs | ||
| Cargo.toml | ||
| clipboard_provider.rs | ||
| CMakeLists.txt | ||
| devtools.rs | ||
| document_loader.rs | ||
| fetch.rs | ||
| layout_image.rs | ||
| lib.rs | ||
| mem.rs | ||
| microtask.rs | ||
| network_listener.rs | ||
| script_runtime.rs | ||
| script_thread.rs | ||
| serviceworker_manager.rs | ||
| serviceworkerjob.rs | ||
| stylesheet_loader.rs | ||
| task.rs | ||
| test.rs | ||
| textinput.rs | ||
| timers.rs | ||
| unpremultiplytable.rs | ||
| webdriver_handlers.rs | ||
