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flutter / mirrors / engine / 9113bc8f4bcdb4fedb7fbfdb2389e6e0a4dd9fcb
commit9113bc8f4bcdb4fedb7fbfdb2389e6e0a4dd9fcb[log] [tgz]
authorgaaclarke <30870216+gaaclarke@users.noreply.github.com>Thu Nov 16 14:34:22 2023 -0800
committerGitHub <noreply@github.com>Thu Nov 16 22:34:22 2023 +0000
tree798257c484402f39c0f94896725f17bff73307c7
parentaae07e989b0a031c1b1fd2739cd10757e7cbd67f [diff]
[Impeller] Implements gaussian blur that scales down before applying the blur (#47576)

A partial implementation of the new gaussian blur effect.  This should perform enough of the code to start getting some performance numbers.

Known outstanding problems:
  1) The edges of the blur are clipped.   I have notes on how I plan on expanding render space in the PR.
  1) Animating the sigma causes some "jumping around artifacts" resulting from the downsampling (maybe the discrete nature of texture pixel size?)
  1) Coverage hints are ignored.  I think depth tests will make that not much of an issue.
  1) We aren't ping ponging textures yet
  1) The snapshot's transform is ignored.

issue: https://github.com/flutter/flutter/issues/131580

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
16 files changed
tree: 798257c484402f39c0f94896725f17bff73307c7
  1. .github/
  2. assets/
  3. benchmarking/
  4. build/
  5. ci/
  6. common/
  7. display_list/
  8. docs/
  9. examples/
  10. flow/
  11. flutter_frontend_server/
  12. flutter_vma/
  13. fml/
  14. impeller/
  15. lib/
  16. runtime/
  17. shell/
  18. skia/
  19. sky/
  20. testing/
  21. third_party/
  22. tools/
  23. vulkan/
  24. wasm/
  25. web_sdk/
  26. .ci.yaml
  27. .clang-format
  28. .clang-tidy
  29. .gitattributes
  30. .gitignore
  31. .pylintrc
  32. .style.yapf
  33. analysis_options.yaml
  34. AUTHORS
  35. BUILD.gn
  36. CODEOWNERS
  37. CONTRIBUTING.md
  38. DEPS
  39. Doxyfile
  40. LICENSE
  41. README.md
README.md

Flutter Engine

OpenSSF Scorecard SLSA 1

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.