1b7cd83b57
This PR allows rounded superellipses to have asymmetrical and uneven radii, effectively supporting `BorderRadius` instead of mere `double` as corner radius. Fixes https://github.com/flutter/flutter/issues/161207. https://github.com/user-attachments/assets/6293028c-d14b-4ffb-b93e-d0602f5ca0ee These features exist in SwiftUI: The `RoundedRectangle` class provides an initializer with a `cornerSize` parameter, allowing different radii for the horizontal and vertical directions, while the `UnevenRoundedRectangle` class allows each corner to have a unique radius. However, SwiftUI does not allow the corners to be asymmetrical _and_ uneven at the same time, which is supported by this PR. Additionally, this change allows rounded superellipses to use the same API as rounded rectangles. This allows RSEs to be added as a style of `RRect` (just like in SwiftUI), which will use much fewer changes than adding it as a new shape (>1500 LOC according to my prototype). This PR also improves performance by removing an intermediate cache for flipping. Now the point list is only copied once for the triangle strip rearrangement. `RoundingRadii` is moved to a separate file, and the code to scale it based on bounds now its method. ## Pre-launch Checklist - [ ] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [ ] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [ ] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [ ] I signed the [CLA]. - [ ] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [ ] I added new tests to check the change I am making, or this PR is [test-exempt]. - [ ] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [ ] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
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