Don't process events while borrowing the event loop
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At the moment, the glutin embedder holds onto a borrow of the events loop while processing events, which is dangerous if any of the event handlers end up using the events loop reentrantly. (This caused a panic while integrating https://github.com/servo/rust-webvr/pull/84.)
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- [X] These changes do not require tests because this is low-level embedding code
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Remove dirs crate from use in UWP builds.
The dirs crate relies on APIs that aren't available to UWP apps. This adds the ability to hide it from builds that need to run in UWP environments.
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Note: The WheelEvent interface supports rotation in all 3 spatial
dimensions. This implementation only supports two due to limitations
in the Glutin compositor.
The wheelevent interface is a dom interface that triggers for any
attached device that can rotate in one or more spatial dimensions.
Traditionally this is the mouse wheel though other devices could be
used as well. E.g. the trackball on a trackball mouse.
Make prepare_for_composite return void
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Changed the signature of `fn prepare_for_composite(...)` to return void (unit) instead of boolean.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#23492 (GitHub issue number if applicable)
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- [ ] There are tests for these changes OR
- [x] These changes do not require tests because these are clean-up changes (do not include new feature or fixed bug).
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Build simpleservo on Windows
The mozangle change means that we don't rebuild mozangle (and transitively script) because the requested features are different when building libsimpleservo.
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Fix behaviour of window resizing on Windows.
This makes Windows builds usable when the window is resized.
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#23489
- [x] These changes do not require tests because we can't run tests on Windows CI yet.
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Add optional ANGLE support to glutin port
Supporting ANGLE in Servo has two important benefits:
* we can actually run Servo instances on our Windows CI machines, which gives us more confidence that we're not breaking it
* we can continue to use OpenGL on devices like the Hololens, rather than creating platform-specific graphical backends
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