Add HCPP feature flag, and turn it on by default in beta/master by gmackall · Pull Request #190623 · flutter/flutter

gmackall · 2026-08-05T17:53:26Z

AI pr description which is correct (I checked 🙂 )

Enables the enable-hcpp feature flag by default on the master and beta channels (remains default off on stable).
Pipes the feature flag default through FlutterCommand.enableHcpp into BuildInfo.androidEnableHcpp, allowing Gradle's EnableHcppManifestTask (landed in Add --[no-]enable-hcpp build flag and pipe through via Gradle manifest transformation #189955) to inject io.flutter.embedding.android.EnableHcpp = true into the merged manifest when the app's manifest is silent.
Preserves the established precedence: explicit --[no-]enable-hcpp CLI flag > AndroidManifest.xml > feature flag default.
Ensures DebuggingOptions.enableHcpp is treated as a nullable bool?, only passing launch overrides (--enable-hcpp-and-surface-control=$enableHcpp / --ez enable-hcpp-and-surface-control $enableHcpp) when explicitly provided on the CLI, allowing the installed artifact's manifest to decide by default.
Updates unit and command test suites across flutter_tools.

Note for reviewers: iOS reviewers were auto-requested because build_swift_package_test.dart was updated to implement isHcppEnabled in its FakeFeatureFlags (queried by FlutterCommand.getBuildInfo()). No iOS or Swift Package Manager logic is changed.

Defines the flag and wires up the `isHcppEnabled` getter, but nothing reads it yet. Available on all channels so it can be turned off with `flutter config --no-enable-hcpp` (or `FLUTTER_ENABLE_HCPP=false`) and turned on early on stable.

`DebuggingOptions.enableHcpp` becomes nullable: null means `--[no-]enable-hcpp` was not passed, and no `enable-hcpp-and-surface-control` extra is sent, so the manifest of the installed artifact decides. An explicit false is now forwarded too, which it previously was not.

`FlutterCommand.enableHcpp` now falls back to the feature flag instead of false, so `-Penable-hcpp=true` is passed on master and beta and the Flutter Gradle Plugin injects the metadata when the merged manifest does not set it. An explicit `--[no-]enable-hcpp` and an explicit manifest entry both still win, and the hcpp analytics follow what is packaged. Keeps the android_engine_test manifest explicit so those tests stay on the mode they are written for.

Uses `enable-hcpp` as the worked example, and calls out that the trick only works where the injected configuration cannot conflict with configuration the developer owns.

These assert gradle properties and analytics values that now follow the `enable-hcpp` feature flag, so pin it rather than let the channel decide. `flutter build aar` keeps piping the property through: the plugin ignores it for library projects, which the test now says instead of asserting a false that only held while the default was hardcoded.

`runEnableHcpp` reported the flag value, which stopped matching what gets packaged once the default came from the feature flag: an explicit manifest entry wins over it. Use the same explicit flag > manifest > feature flag estimate that `build apk`/`appbundle` already report.

gemini-code-assist

Code Review

This pull request integrates the enable-hcpp feature flag for the HCPP platform view rendering mode on Android across the Flutter tools, updating the run, build, and test commands, as well as Gradle integration and telemetry. A review comment suggests guarding the HCPP enablement check in run.dart with project.android.exists to prevent non-Android projects from incorrectly reporting HCPP as enabled in telemetry.

auto-submit · 2026-08-26T21:02:40Z

autosubmit label was removed for flutter/flutter/190623, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label.

auto-submit · 2026-08-26T22:02:36Z

auto label is removed for flutter/flutter/190623, Failed to enqueue flutter/flutter/190623 with HTTP 400: Pull request Required status check "Check Code Freeze" is queued..

auto-submit · 2026-08-26T23:31:43Z

autosubmit label was removed for flutter/flutter/190623, because - The status or check suite Dashboard Checks has failed. Please fix the issues identified (or deflake) before re-applying this label.

…tter#191894) Fixes the failure in `Linux_mokey hybrid_android_views_integration_test` caused by HCPP being enabled by default in flutter#190623. The `hybrid_android_views` integration test specifically verifies legacy Hybrid Composition view hierarchy behavior and expects `FlutterImageView`s to be present in the view tree. Since HCPP relies on `SurfaceControl` overlays on API 34+ rather than `FlutterImageView`, this test app needs to explicitly opt out of HCPP to continue testing the legacy HC mode as intended.

Roll Flutter from 15d8908addf6 to e8dca90ec9e0 (58 revisions) flutter/flutter@15d8908...e8dca90 2026-08-27 15619084+vashworth@users.noreply.github.com Terminate existing process before launching with devicectl (flutter/flutter#191885) 2026-08-27 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from qjOQi-zAgu_tADorh... to dDxH8G5cDBP602eyG... (flutter/flutter#191889) 2026-08-27 bkonyi@google.com [flutter_tools] Verify native assets tree-shaking during linking (flutter/flutter#191637) 2026-08-27 30870216+gaaclarke@users.noreply.github.com Denylists b-series powervr from vulkan (flutter/flutter#191808) 2026-08-27 97480502+b-luk@users.noreply.github.com Handle linear and radial gradients in UberSDF (flutter/flutter#190874) 2026-08-27 engine-flutter-autoroll@skia.org Roll Packages from 740f093 to bd3cbc1 (7 revisions) (flutter/flutter#191886) 2026-08-27 jason-simmons@users.noreply.github.com Disable more Windows tests that have been causing CI flakes (flutter/flutter#191822) 2026-08-27 engine-flutter-autoroll@skia.org Roll Skia from d32721369bd8 to 82e972ea84b1 (2 revisions) (flutter/flutter#191880) 2026-08-27 engine-flutter-autoroll@skia.org Roll Skia from 3640b8edd16c to d32721369bd8 (10 revisions) (flutter/flutter#191858) 2026-08-27 154381524+flutteractionsbot@users.noreply.github.com Revert: [AGP 9] Update remaining tests to AGP 9 (flutter/flutter#191863) 2026-08-27 engine-flutter-autoroll@skia.org Roll Fuchsia Test Scripts from 0iCv10IlKfiilEBOU... to 6SXRz6wsA2Zm_rAqP... (flutter/flutter#191852) 2026-08-27 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#191851) 2026-08-27 46920873+gabrimatic@users.noreply.github.com Refactor FormField build wrappers (flutter/flutter#185795) 2026-08-27 50643541+Mairramer@users.noreply.github.com Make ScrollPhysics reactive by introducing shouldUpdate (flutter/flutter#189664) 2026-08-27 chris@bracken.jp macOS: Fix crash on out-of-bounds text input ranges (flutter/flutter#191780) 2026-08-27 34871572+gmackall@users.noreply.github.com Add HCPP feature flag, and turn it on by default in beta/master (flutter/flutter#190623) 2026-08-27 bkonyi@google.com [tool] Migrate CleanCommand to modular dependency injection (flutter/flutter#190742) 2026-08-26 katelovett@google.com Update triage docs for ecosystem and codelab changes (flutter/flutter#191809) 2026-08-26 jesswon@google.com [AGP 9] Update remaining tests to AGP 9 (flutter/flutter#191824) 2026-08-26 louisehsu@google.com [UIScene] Migrate dev/benchmarks/complex_layout to UIScene lifecycle (flutter/flutter#191619) 2026-08-26 57765714+Vi-debug@users.noreply.github.com Add SliverAppBar showOnScreen semantics test coverage (flutter/flutter#190410) 2026-08-26 95318996+shawnridgeway-google@users.noreply.github.com Add prompt_suggestion icon to list of RTL mirroring icons. (flutter/flutter#191741) 2026-08-26 okorohelijah@google.com Remove bringup for batch 3 (flutter/flutter#191750) 2026-08-26 engine-flutter-autoroll@skia.org Roll Skia from b5465d7b0b77 to 3640b8edd16c (6 revisions) (flutter/flutter#191835) 2026-08-26 louisehsu@google.com Uiscene migrate custom channels views (flutter/flutter#191817) 2026-08-26 matt.boetger@gmail.com Support --[no-]adb-log-filtering CLI option (flutter/flutter#187252) 2026-08-26 engine-flutter-autoroll@skia.org Roll Dart SDK from cb8a4e1a0fbb to cb4c39d067f3 (2 revisions) (flutter/flutter#191825) 2026-08-26 nate.w5687@gmail.com Fix `Navigator.pushNamed<T>()` type checking (flutter/flutter#188148) 2026-08-26 robert.ancell@canonical.com Handle the case where a window doesn't have a title set (flutter/flutter#191767) 2026-08-26 github@alexv525.com [Android] Remove old `InputType` constructor from embedding (flutter/flutter#191244) 2026-08-26 engine-flutter-autoroll@skia.org Roll Skia from 244a6a0f8f92 to b5465d7b0b77 (19 revisions) (flutter/flutter#191810) 2026-08-26 46920873+gabrimatic@users.noreply.github.com Tolerate floating-point rounding in paintImage centerSlice assertion (flutter/flutter#185789) 2026-08-26 30870216+gaaclarke@users.noreply.github.com Fixes translated bounded blurs (flutter/flutter#191615) 2026-08-26 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from MstTWE1RDOT-RnrtH... to qjOQi-zAgu_tADorh... (flutter/flutter#191769) 2026-08-26 136096126+glitchfl@users.noreply.github.com Lerp HSVColor and HSLColor hue along the shortest arc (flutter/flutter#191186) 2026-08-26 116356835+AbdeMohlbi@users.noreply.github.com Fix enum instances comparison to use `equality ==` since dart has the correct behavior now (flutter/flutter#191537) 2026-08-26 30870216+gaaclarke@users.noreply.github.com Switches windows to opengles 3 (flutter/flutter#191516) 2026-08-26 engine-flutter-autoroll@skia.org Roll Dart SDK from 7739e8602bc1 to cb8a4e1a0fbb (1 revision) (flutter/flutter#191784) 2026-08-26 chris@bracken.jp iOS,macOS: Check viewType before creating a platform view (flutter/flutter#191777) 2026-08-26 154381524+flutteractionsbot@users.noreply.github.com Revert: [tool_tests] Remove bringup from Windows tool_tests_commands_2_2 (flutter/flutter#191793) 2026-08-26 kevmoo@users.noreply.github.com refactor(flutter_tools): clean up dead unreferenced declarations (flutter/flutter#191163) 2026-08-26 engine-flutter-autoroll@skia.org Roll Fuchsia GN SDK from a87CbQSWEjkPUK1ZY... to ZsxUUK2SfA-TrNvb8... (flutter/flutter#191763) 2026-08-26 bkonyi@google.com [tool_tests] Remove bringup from Windows tool_tests_commands_2_2 (flutter/flutter#191732) 2026-08-25 36861262+QuncCccccc@users.noreply.github.com Remove legacy gen_defaults analyze checks (flutter/flutter#191629) 2026-08-25 52160996+FMorschel@users.noreply.github.com Refactors `try` to avoid `unawaited_return_in_try_block` case (flutter/flutter#191129) 2026-08-25 engine-flutter-autoroll@skia.org Roll Dart SDK from 8996935d3d0a to 7739e8602bc1 (1 revision) (flutter/flutter#191754) ...

…ests (#191908) Follow-up to #191894. Like `hybrid_android_views` in #191894, several other test and benchmark apps were designed to specifically exercise explicit Android platform view modes (Texture Layer Hybrid Composition / TLHC, legacy Hybrid Composition / HC, or Virtual Display): * `dev/benchmarks/platform_views_layout`: Exercises Texture Layer Hybrid Composition in `createAndroidTextureScrollPerfTest`. On API 34+ Impeller Vulkan devices (such as `Linux_pixel_7pro platform_views_scroll_perf_impeller__timeline_summary`), leaving the manifest silent causes HCPP to be enabled by default from #190623, turning this into an HCPP benchmark rather than testing TLHC under Impeller. The companion `platform_views_hcpp_scroll_perf` test dynamically injects `EnableHcpp = true` into the manifest and resets it on completion. * `dev/benchmarks/platform_views_layout_hybrid_composition`: Specifically measures legacy Hybrid Composition scrolling performance (`platform_views_scroll_perf_hybrid_composition`) via `PlatformViewsService.initExpensiveAndroidView`. * `dev/integration_tests/android_views`: Tests `MotionEvent` forwarding/recomposition and Android `WindowManager` integrations with standard `AndroidView` (TLHC). * `dev/integration_tests/android_verified_input`: Verifies verifiable motion events dispatched to a standard `AndroidView` (TLHC). Since HCPP intercepts platform view creation requests on API 34+ when enabled, these apps need to explicitly opt out of HCPP in their manifests to continue testing and measuring their intended legacy platform view modes.

gaaclarke · 2026-08-31T20:22:43Z

heads up @gmackall , this switch improved the average rasterizer time, but lengthened the benchmark for the 90th percentile about 2%. I'm guessing that's fine. I just wanted to let you know.

https://flutter-flutter-perf.luci.app/e/?begin=1787768938&enable_chart_tooltip=true&enable_favorites=true&end=1788207624&keys=X22ea5b0cc3f0256be8a7a709a14d8ccb&plotSummary=true&selected=commit%3D2809540%26name%3D%252Carch%253Dintel%252Cbranch%253Dmaster%252Cconfig%253Ddefault%252Cdevice_type%253Dmokey%252Cdevice_version%253Dnone%252Chost_type%253Dlinux%252Csub_result%253D90th_percentile_frame_rasterizer_time_millis%252Ctest%253Dcolor_filter_with_unstable_child_perf__e2e_summary%252C%26tableCol%3D2%26tableRow%3D1557&use_titles=true&xbaroffset=2809540

gmackall · 2026-08-31T21:10:56Z

heads up @gmackall , this switch improved the average rasterizer time, but lengthened the benchmark for the 90th percentile about 2%. I'm guessing that's fine. I just wanted to let you know.

https://flutter-flutter-perf.luci.app/e/?begin=1787768938&enable_chart_tooltip=true&enable_favorites=true&end=1788207624&keys=X22ea5b0cc3f0256be8a7a709a14d8ccb&plotSummary=true&selected=commit%3D2809540%26name%3D%252Carch%253Dintel%252Cbranch%253Dmaster%252Cconfig%253Ddefault%252Cdevice_type%253Dmokey%252Cdevice_version%253Dnone%252Chost_type%253Dlinux%252Csub_result%253D90th_percentile_frame_rasterizer_time_millis%252Ctest%253Dcolor_filter_with_unstable_child_perf__e2e_summary%252C%26tableCol%3D2%26tableRow%3D1557&use_titles=true&xbaroffset=2809540

I think that's fine, I believe this is because use of HCPP also turns on use of the AHardwardBuffer swapchain, and so has implications for non-pv rendering cases as well. Will send an old thread about this over chat

…enable-hcpp tests (flutter#192202) ## Description This PR fixes an issue where passing `--no-enable-hcpp` failed to disable SurfaceControl on Android, and adds integration tests to positively validate that `--no-enable-hcpp` disables HCPP and falls back to legacy platform view rendering. ### Background & Root Cause In PR flutter#190623, `enableHcpp` in the Flutter tool was converted from a non-nullable `bool` to a nullable `bool?` to support overriding manifest metadata via CLI (`--enable-hcpp` vs `--no-enable-hcpp`). This led to `device.dart` forwarding `--ez enable-hcpp-and-surface-control false` as an intent extra when `--no-enable-hcpp` was passed. In turn, `FlutterShellArgs` converted this extra to the command-line flag `--enable-hcpp-and-surface-control=false`. However, the engine's switch parser in `switches.cc` checked: ```cpp settings.enable_surface_control = command_line.HasOption(FlagForSwitch(Switch::EnableAndroidHcppAndSurfaceControl)); ``` Because `fml::CommandLine::HasOption` only checks whether the switch key is present regardless of its assigned value, `--enable-hcpp-and-surface-control=false` evaluated to `true`, keeping SurfaceControl enabled even when `--no-enable-hcpp` was passed. ### Changes This PR is split into two commits: 1. **Commit 1 (`97a2282ef03`)**: Add integration / driver tests in `run_android_engine_tests.dart` and `upgrade_legacy_pv_types_main_test.dart` to positively test that `--no-enable-hcpp` disables HCPP and falls back to legacy platform view rendering (`Using legacy platform view rendering strategy.`). 2. **Commit 2 (`a00f2c65372`)**: Update `switches.cc` to inspect the switch value using `command_line.GetOptionValue(...)`, verifying that it is empty (flag without value) or `"true"`. Add unit tests in `switches_unittests.cc` covering `--enable-hcpp-and-surface-control=true`, `--enable-hcpp-and-surface-control`, `--enable-hcpp-and-surface-control=false`, and absence of the flag. --- > [!NOTE] > This pull request was generated with Gemini / AI assistance for transparency. ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [AI contribution guidelines] and understand my responsibilities, or I am not using AI tools. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [ ] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant in-code documentation (doc comments with `///`). - [x] If this PR introduces a new feature or capability, I created and linked a website documentation issue or PR in [flutter/website] (or verified none is needed). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing.  [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [AI contribution guidelines]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#ai-contribution-guidelines [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 [flutter/website]: https://github.com/flutter/website [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

…r#12660) Roll Flutter from 15d8908addf6 to e8dca90ec9e0 (58 revisions) flutter/flutter@15d8908...e8dca90 2026-08-27 15619084+vashworth@users.noreply.github.com Terminate existing process before launching with devicectl (flutter/flutter#191885) 2026-08-27 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from qjOQi-zAgu_tADorh... to dDxH8G5cDBP602eyG... (flutter/flutter#191889) 2026-08-27 bkonyi@google.com [flutter_tools] Verify native assets tree-shaking during linking (flutter/flutter#191637) 2026-08-27 30870216+gaaclarke@users.noreply.github.com Denylists b-series powervr from vulkan (flutter/flutter#191808) 2026-08-27 97480502+b-luk@users.noreply.github.com Handle linear and radial gradients in UberSDF (flutter/flutter#190874) 2026-08-27 engine-flutter-autoroll@skia.org Roll Packages from 740f093 to bd3cbc1 (7 revisions) (flutter/flutter#191886) 2026-08-27 jason-simmons@users.noreply.github.com Disable more Windows tests that have been causing CI flakes (flutter/flutter#191822) 2026-08-27 engine-flutter-autoroll@skia.org Roll Skia from d32721369bd8 to 82e972ea84b1 (2 revisions) (flutter/flutter#191880) 2026-08-27 engine-flutter-autoroll@skia.org Roll Skia from 3640b8edd16c to d32721369bd8 (10 revisions) (flutter/flutter#191858) 2026-08-27 154381524+flutteractionsbot@users.noreply.github.com Revert: [AGP 9] Update remaining tests to AGP 9 (flutter/flutter#191863) 2026-08-27 engine-flutter-autoroll@skia.org Roll Fuchsia Test Scripts from 0iCv10IlKfiilEBOU... to 6SXRz6wsA2Zm_rAqP... (flutter/flutter#191852) 2026-08-27 137456488+flutter-pub-roller-bot@users.noreply.github.com Roll pub packages (flutter/flutter#191851) 2026-08-27 46920873+gabrimatic@users.noreply.github.com Refactor FormField build wrappers (flutter/flutter#185795) 2026-08-27 50643541+Mairramer@users.noreply.github.com Make ScrollPhysics reactive by introducing shouldUpdate (flutter/flutter#189664) 2026-08-27 chris@bracken.jp macOS: Fix crash on out-of-bounds text input ranges (flutter/flutter#191780) 2026-08-27 34871572+gmackall@users.noreply.github.com Add HCPP feature flag, and turn it on by default in beta/master (flutter/flutter#190623) 2026-08-27 bkonyi@google.com [tool] Migrate CleanCommand to modular dependency injection (flutter/flutter#190742) 2026-08-26 katelovett@google.com Update triage docs for ecosystem and codelab changes (flutter/flutter#191809) 2026-08-26 jesswon@google.com [AGP 9] Update remaining tests to AGP 9 (flutter/flutter#191824) 2026-08-26 louisehsu@google.com [UIScene] Migrate dev/benchmarks/complex_layout to UIScene lifecycle (flutter/flutter#191619) 2026-08-26 57765714+Vi-debug@users.noreply.github.com Add SliverAppBar showOnScreen semantics test coverage (flutter/flutter#190410) 2026-08-26 95318996+shawnridgeway-google@users.noreply.github.com Add prompt_suggestion icon to list of RTL mirroring icons. (flutter/flutter#191741) 2026-08-26 okorohelijah@google.com Remove bringup for batch 3 (flutter/flutter#191750) 2026-08-26 engine-flutter-autoroll@skia.org Roll Skia from b5465d7b0b77 to 3640b8edd16c (6 revisions) (flutter/flutter#191835) 2026-08-26 louisehsu@google.com Uiscene migrate custom channels views (flutter/flutter#191817) 2026-08-26 matt.boetger@gmail.com Support --[no-]adb-log-filtering CLI option (flutter/flutter#187252) 2026-08-26 engine-flutter-autoroll@skia.org Roll Dart SDK from cb8a4e1a0fbb to cb4c39d067f3 (2 revisions) (flutter/flutter#191825) 2026-08-26 nate.w5687@gmail.com Fix `Navigator.pushNamed<T>()` type checking (flutter/flutter#188148) 2026-08-26 robert.ancell@canonical.com Handle the case where a window doesn't have a title set (flutter/flutter#191767) 2026-08-26 github@alexv525.com [Android] Remove old `InputType` constructor from embedding (flutter/flutter#191244) 2026-08-26 engine-flutter-autoroll@skia.org Roll Skia from 244a6a0f8f92 to b5465d7b0b77 (19 revisions) (flutter/flutter#191810) 2026-08-26 46920873+gabrimatic@users.noreply.github.com Tolerate floating-point rounding in paintImage centerSlice assertion (flutter/flutter#185789) 2026-08-26 30870216+gaaclarke@users.noreply.github.com Fixes translated bounded blurs (flutter/flutter#191615) 2026-08-26 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from MstTWE1RDOT-RnrtH... to qjOQi-zAgu_tADorh... (flutter/flutter#191769) 2026-08-26 136096126+glitchfl@users.noreply.github.com Lerp HSVColor and HSLColor hue along the shortest arc (flutter/flutter#191186) 2026-08-26 116356835+AbdeMohlbi@users.noreply.github.com Fix enum instances comparison to use `equality ==` since dart has the correct behavior now (flutter/flutter#191537) 2026-08-26 30870216+gaaclarke@users.noreply.github.com Switches windows to opengles 3 (flutter/flutter#191516) 2026-08-26 engine-flutter-autoroll@skia.org Roll Dart SDK from 7739e8602bc1 to cb8a4e1a0fbb (1 revision) (flutter/flutter#191784) 2026-08-26 chris@bracken.jp iOS,macOS: Check viewType before creating a platform view (flutter/flutter#191777) 2026-08-26 154381524+flutteractionsbot@users.noreply.github.com Revert: [tool_tests] Remove bringup from Windows tool_tests_commands_2_2 (flutter/flutter#191793) 2026-08-26 kevmoo@users.noreply.github.com refactor(flutter_tools): clean up dead unreferenced declarations (flutter/flutter#191163) 2026-08-26 engine-flutter-autoroll@skia.org Roll Fuchsia GN SDK from a87CbQSWEjkPUK1ZY... to ZsxUUK2SfA-TrNvb8... (flutter/flutter#191763) 2026-08-26 bkonyi@google.com [tool_tests] Remove bringup from Windows tool_tests_commands_2_2 (flutter/flutter#191732) 2026-08-25 36861262+QuncCccccc@users.noreply.github.com Remove legacy gen_defaults analyze checks (flutter/flutter#191629) 2026-08-25 52160996+FMorschel@users.noreply.github.com Refactors `try` to avoid `unawaited_return_in_try_block` case (flutter/flutter#191129) 2026-08-25 engine-flutter-autoroll@skia.org Roll Dart SDK from 8996935d3d0a to 7739e8602bc1 (1 revision) (flutter/flutter#191754) ...

gmackall added 6 commits August 5, 2026 09:15

Document piping a feature flag into a platform build

1c6c725

Uses `enable-hcpp` as the worked example, and calls out that the trick only works where the injected configuration cannot conflict with configuration the developer owns.

gmackall added the CICD Run CI/CD label Aug 5, 2026

gmackall and others added 4 commits August 12, 2026 10:45

Merge branch 'master' into hcpp-feature-flag-default-on

f8cae4a

Default hcpp on for master only, not beta yet

9cef81f

Merge upstream/master and enable HCPP on beta and master

2d1bd8d

Clarify runEnableHcpp estimate comment in run.dart

6b2d8f0

gmackall changed the title ~~Hcpp feature flag default on beta/master~~ Add HCPP feature flag, and turn it on by default in beta/master Aug 19, 2026

gmackall marked this pull request as ready for review August 19, 2026 20:35

gmackall requested review from a team as code owners August 19, 2026 20:35

gmackall requested review from camsim99 and removed request for a team August 19, 2026 20:35

gemini-code-assist Bot reviewed Aug 19, 2026

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Comment thread packages/flutter_tools/lib/src/commands/run.dart Outdated

Only compute runEnableHcpp usage value for Android devices and projects

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gmackall force-pushed the hcpp-feature-flag-default-on branch from db22f1f to b9f8e89 Compare August 19, 2026 22:45

Merge branch 'master' into hcpp-feature-flag-default-on

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gmackall added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 26, 2026

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Merge branch 'master' into hcpp-feature-flag-default-on

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gmackall added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 26, 2026

auto-submit Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Aug 26, 2026

gmackall added the autosubmit Merge PR when tree becomes green via auto submit App label Aug 27, 2026

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Merged via the queue into flutter:master with commit 0a42304 Aug 27, 2026
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flutter-dashboard Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label Aug 27, 2026

github-project-automation Bot moved this to Done in Hybrid Composition++ (HCPP) Platform Views Aug 27, 2026

This was referenced Aug 27, 2026

Roll Flutter from 15d8908addf6 to a6ecd35d6bec (50 revisions) flutter/packages#12650

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Roll Flutter from 15d8908addf6 to c38289ff26cf (52 revisions) flutter/packages#12651

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gmackall mentioned this pull request Aug 27, 2026

Explicitly disable HCPP in hybrid_android_views integration test #191894

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This was referenced Aug 27, 2026

Roll Flutter from 15d8908addf6 to 8151540462a4 (55 revisions) flutter/packages#12659

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Roll Flutter from 15d8908addf6 to e8dca90ec9e0 (58 revisions) flutter/packages#12660

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gmackall mentioned this pull request Aug 27, 2026

Explicitly disable HCPP in platform view benchmarks and integration tests #191908

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This was referenced Aug 31, 2026

[Android] Decouple AHB swapchain transactions from Java when no platform views are active #192083

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Fix parsing of --enable-hcpp-and-surface-control switch and add --no-enable-hcpp tests #192202

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Add HCPP feature flag, and turn it on by default in beta/master - #190623

Add HCPP feature flag, and turn it on by default in beta/master#190623
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gmackall commented Aug 5, 2026 •

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