eb1f10ea00
Fixes https://github.com/flutter/flutter/issues/116070 Fixes https://github.com/flutter/flutter/issues/126202 Introduces `DlRegion` class which implements subset of `SkRegion` required to get non-overlapping rectangles from region. The implementation is different and faster than `SkRegion` for this particular use-case (`display_list_region_benchmarks`): Edit: Updated benchmark to latest revision and natively (initial run went through rosetta) ``` ---------------------------------------------------------------------------- Benchmark Time CPU Iterations ---------------------------------------------------------------------------- BM_RegionBenchmarkDlRegion/Tiny 616 us 616 us 908 BM_RegionBenchmarkSkRegion/Tiny 70559 us 70557 us 10 BM_RegionBenchmarkDlRegion/Small 1315 us 1314 us 537 BM_RegionBenchmarkSkRegion/Small 121736 us 121717 us 6 BM_RegionBenchmarkDlRegion/Medium 1079 us 1079 us 650 BM_RegionBenchmarkSkRegion/Medium 22039 us 22035 us 32 BM_RegionBenchmarkDlRegion/Large 399 us 399 us 1763 BM_RegionBenchmarkSkRegion/Large 1510 us 1510 us 466 ``` ## Pre-launch Checklist - [X] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [X] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [X] I read and followed the [Flutter Style Guide] and the [C++, Objective-C, Java style guides]. - [X] I listed at least one issue that this PR fixes in the description above. - [X] I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test-exempt. See [testing the engine] for instructions on writing and running engine tests. - [X] I updated/added relevant documentation (doc comments with `///`). - [X] I signed the [CLA]. - [X] 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/wiki/Tree-hygiene#overview [Tree Hygiene]: https://github.com/flutter/flutter/wiki/Tree-hygiene [Flutter Style Guide]: https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style [testing the engine]: https://github.com/flutter/flutter/wiki/Testing-the-engine [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/wiki/Tree-hygiene#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/wiki/Chat
Flutter Engine
Flutter is Google's SDK for crafting beautiful, fast user experiences for mobile, web, and desktop from a single codebase. Flutter works with existing code, is used by developers and organizations around the world, and is free and open source.
The Flutter Engine is a portable runtime for hosting Flutter applications. It implements Flutter's core libraries, including animation and graphics, file and network I/O, accessibility support, plugin architecture, and a Dart runtime and compile toolchain. Most developers will interact with Flutter via the Flutter Framework, which provides a modern, reactive framework, and a rich set of platform, layout and foundation widgets.
If you want to run/contribute to Flutter Web engine, more tooling can be found at felt. This is a tool written to make web engine development experience easy.
If you are new to Flutter, then you will find more general information on the Flutter project, including tutorials and samples, on our Web site at Flutter.dev. For specific information about Flutter's APIs, consider our API reference which can be found at the docs.flutter.dev.
Flutter is a fully open source project, and we welcome contributions. Information on how to get started can be found at our contributor guide.