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This updates the Skwasm library to conform to the style of the rest of the engine. This includes:

  • Moving the location of the skwasm library into engine/src/flutter/skwasm instead of engine/src/flutter/lib/web_ui/skwasm, since that was altogether too nested and weird.
  • Changed all the file extensions to .cc instead of .cpp
  • Changed all local include paths to be from the engine/src/flutter directory rather than relying on the source file's location.
  • Changed ordering of include paths.
  • Removed instances of using namespace
  • Changed local variable names and argument names to use snake_case
  • Changed class functions to use UpperCamelCase
  • Changed private member variables to use trailing_ underscore instead of _leading.
  • Removed some uses of auto

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It looks like this pull request may not have tests. Please make sure to add tests or get an explicit test exemption before merging.

If you are not sure if you need tests, consider this rule of thumb: the purpose of a test is to make sure someone doesn't accidentally revert the fix. Ask yourself, is there anything in your PR that you feel it is important we not accidentally revert back to how it was before your fix?

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. If you believe this PR qualifies for a test exemption, contact "@test-exemption-reviewer" in the #hackers channel in Discord (don't just cc them here, they won't see it!). The test exemption team is a small volunteer group, so all reviewers should feel empowered to ask for tests, without delegating that responsibility entirely to the test exemption group.

@github-actions github-actions bot added a: text input Entering text in a text field or keyboard related problems engine flutter/engine related. See also e: labels. platform-web Web applications specifically labels Dec 11, 2025
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Code Review

This pull request is a large refactoring to align the Skwasm library with the engine's C++ style guidelines. The changes include moving files to a new directory, renaming file extensions from .cpp to .cc, updating include paths, and applying naming conventions for variables, functions, and members. My review focuses on areas where the new style conventions were missed. I've pointed out several free-standing functions that should be renamed to UpperCamelCase to fully comply with the Google C++ Style Guide, as adopted by the project.

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lgtm! I don't know if we got everything but this is definitely a huge step to getting us there. We can address anything else as they come up in code reviews. Thanks jackson, I hope the bot was able to do a lot of the heavy lifting.

@eyebrowsoffire eyebrowsoffire added the autosubmit Merge PR when tree becomes green via auto submit App label Dec 12, 2025
@auto-submit auto-submit bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Dec 12, 2025
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auto-submit bot commented Dec 12, 2025

autosubmit label was removed for flutter/flutter/179756, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label.

@eyebrowsoffire eyebrowsoffire added the autosubmit Merge PR when tree becomes green via auto submit App label Dec 12, 2025
@auto-submit auto-submit bot added this pull request to the merge queue Dec 12, 2025
Merged via the queue into flutter:master with commit 1963354 Dec 12, 2025
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@flutter-dashboard flutter-dashboard bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Dec 12, 2025
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Roll Flutter from 6e1aa82 to d81baab (47 revisions)

flutter/flutter@6e1aa82...d81baab

2025-12-16 68449066+zijiehe-google-com@users.noreply.github.com Revert "chore: linux fuchsia tests are flaking" (flutter/flutter#179897)
2025-12-15 planetmarshall@users.noreply.github.com add default-linux-sysroot to gn frontend args (flutter/flutter#179303)
2025-12-15 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#179751)
2025-12-15 engine-flutter-autoroll@skia.org Roll Skia from 783ce2077e46 to 6903a4e65c3f (2 revisions) (flutter/flutter#179903)
2025-12-15 adilhanney@disroot.org Add `Adwaita Sans` as a font fallback on Linux (flutter/flutter#179144)
2025-12-15 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Unmodified android sdk bundle (#179647)" (flutter/flutter#179904)
2025-12-15 robert.ancell@canonical.com Update window settings as they change rather than the more outdated "Apply" pattern. (flutter/flutter#179861)
2025-12-15 49699333+dependabot[bot]@users.noreply.github.com Bump dessant/lock-threads from 5.0.1 to 6.0.0 in the all-github-actions group (flutter/flutter#179901)
2025-12-15 engine-flutter-autoroll@skia.org Roll Skia from 9decbd4c216b to 783ce2077e46 (2 revisions) (flutter/flutter#179896)
2025-12-15 34871572+gmackall@users.noreply.github.com Unmodified android sdk bundle (flutter/flutter#179647)
2025-12-15 mdebbar@google.com [web] Fix `resizeToAvoidBottomInset` on Android web (flutter/flutter#179581)
2025-12-15 iliyazelenkog@gmail.com Suppress deprecation warning for AChoreographer_postFrameCallback (flutter/flutter#178580)
2025-12-15 planetmarshall@users.noreply.github.com remove unnecessary virtual destructor from VertexDescriptor (flutter/flutter#178682)
2025-12-15 engine-flutter-autoroll@skia.org Roll Dart SDK from b245f6022727 to 20d114f951db (1 revision) (flutter/flutter#179893)
2025-12-15 jason-simmons@users.noreply.github.com [Impeller] Delete GLES framebuffer objects only on the thread where they were created (flutter/flutter#179768)
2025-12-15 jason-simmons@users.noreply.github.com [Impeller] Convert paths in ImpellerC command line flags to std::filesystem::path objects (flutter/flutter#179717)
2025-12-15 engine-flutter-autoroll@skia.org Roll Skia from 5e1ff611b36b to 9decbd4c216b (2 revisions) (flutter/flutter#179890)
2025-12-15 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from DtfDWAx6t_CsD2e1W... to 433KtmJvbMyaDMJvD... (flutter/flutter#179889)
2025-12-15 116356835+AbdeMohlbi@users.noreply.github.com Remove unnecessary unboxing in `FlutterLoader.java‎` (flutter/flutter#179869)
2025-12-15 engine-flutter-autoroll@skia.org Roll Skia from f04f8ca3b284 to 5e1ff611b36b (1 revision) (flutter/flutter#179882)
2025-12-15 engine-flutter-autoroll@skia.org Roll Packages from 0ac7a03 to 2cd921c (1 revision) (flutter/flutter#179885)
2025-12-15 bkonyi@google.com [ Widget Preview ] Pass DTD URI as a constant in a generated file (flutter/flutter#179821)
2025-12-15 116356835+AbdeMohlbi@users.noreply.github.com Bump minSdk to `24` in `engine` (flutter/flutter#175508)
2025-12-15 engine-flutter-autoroll@skia.org Roll Dart SDK from bca8bb37d95f to b245f6022727 (1 revision) (flutter/flutter#179879)
2025-12-15 engine-flutter-autoroll@skia.org Roll Skia from eb1347d18957 to f04f8ca3b284 (1 revision) (flutter/flutter#179876)
2025-12-15 engine-flutter-autoroll@skia.org Roll Skia from 41bcfb848b13 to eb1347d18957 (1 revision) (flutter/flutter#179871)
2025-12-15 engine-flutter-autoroll@skia.org Roll Skia from d194c3b7a9a9 to 41bcfb848b13 (6 revisions) (flutter/flutter#179866)
2025-12-14 robert.ancell@canonical.com Remove obsolete windowing channel (flutter/flutter#179718)
2025-12-14 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from SCLq31whvg8nJvuYE... to DtfDWAx6t_CsD2e1W... (flutter/flutter#179856)
2025-12-14 engine-flutter-autoroll@skia.org Roll Skia from 5d98ce0af031 to d194c3b7a9a9 (1 revision) (flutter/flutter#179854)
2025-12-13 engine-flutter-autoroll@skia.org Roll Skia from f9b242d9a365 to 5d98ce0af031 (1 revision) (flutter/flutter#179843)
2025-12-13 engine-flutter-autoroll@skia.org Roll Skia from abe90c72cf56 to f9b242d9a365 (1 revision) (flutter/flutter#179838)
2025-12-13 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from fppT9ZrwbFx7iYrIh... to SCLq31whvg8nJvuYE... (flutter/flutter#179836)
2025-12-13 engine-flutter-autoroll@skia.org Roll Dart SDK from 34654f2a3baa to bca8bb37d95f (1 revision) (flutter/flutter#179835)
2025-12-13 engine-flutter-autoroll@skia.org Roll Skia from 9e7c893bb593 to abe90c72cf56 (1 revision) (flutter/flutter#179830)
2025-12-13 engine-flutter-autoroll@skia.org Roll Dart SDK from f105c2168574 to 34654f2a3baa (1 revision) (flutter/flutter#179823)
2025-12-13 97480502+b-luk@users.noreply.github.com Add FilterQuality parameter to FragmentShader.setImageSampler (flutter/flutter#179760)
2025-12-13 evanwall@buffalo.edu Add profiling counts to pipeline uses (flutter/flutter#179374)
2025-12-13 engine-flutter-autoroll@skia.org Roll Skia from edf52cb27f29 to 9e7c893bb593 (3 revisions) (flutter/flutter#179819)
2025-12-12 jacksongardner@google.com Update Skwasm to engine style guidelines. (flutter/flutter#179756)
2025-12-12 engine-flutter-autoroll@skia.org Roll Dart SDK from 9a65db770758 to f105c2168574 (5 revisions) (flutter/flutter#179814)
2025-12-12 engine-flutter-autoroll@skia.org Roll Skia from f23b00a407a4 to edf52cb27f29 (5 revisions) (flutter/flutter#179807)
2025-12-12 97480502+b-luk@users.noreply.github.com Use depth buffer to implement geometry overdraw protection (flutter/flutter#179426)
2025-12-12 nshahan@google.com [flutter_tool] Force UTF-8 character set for dev (flutter/flutter#179419)
2025-12-12 engine-flutter-autoroll@skia.org Roll Skia from e66816c3645e to f23b00a407a4 (2 revisions) (flutter/flutter#179798)
2025-12-12 30870216+gaaclarke@users.noreply.github.com Implements decodeImageFromPixelsSync (flutter/flutter#179519)
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