[windows] Add OpenGL compositor tests against ANGLE at D3D11 feature level 10_0 - #194114

…#13220)

Manual roll Flutter from d03768eef055 to 4249ccbc18a3 (158 revisions)

Manual roll requested by [email protected]

flutter/flutter@d03768e...4249ccb

2026-10-12 [email protected] [AGP 9.1.0 Migration #8] Unify add-to-app module wiring on the variant API (flutter/flutter#193717)
2026-10-12 [email protected] [master] Update Flutter DEPS to Dart 5933cb486b4aef2f8cf6b9f89a5651c0d5b0955e (flutter/flutter#193982)
2026-10-12 [email protected] [Android] Fix use-after-free of SurfaceControl.Transaction in HCPP (flutter/flutter#192969)
2026-10-12 [email protected] [windows] Add OpenGL compositor tests against ANGLE at D3D11 feature level 10_0 (flutter/flutter#194114)
2026-10-12 [email protected] Fix HDR image packing for ios (flutter/flutter#192526)
2026-10-12 [email protected] Bump customer tests to pick up material_ui and cupertino_ui (flutter/flutter#194236)
2026-10-12 [email protected] Remove no-shuffle from text_field_test.dart (flutter/flutter#193550)
2026-10-12 [email protected] [web] Clip semantics DOM text labels to stop stealing taps (flutter/flutter#194011)
2026-10-12 [email protected] Roll Skia from 9b6ceba4728d to 17f6986c226c (6 revisions) (flutter/flutter#194232)
2026-10-12 [email protected] [web] Skip non-focusable containers in Focusable.focusAsRouteDefault (flutter/flutter#194138)
2026-10-12 [email protected] [web_paragraph] Honor kTextHeightNone in TextStyle and ParagraphStyle (flutter/flutter#193733)
2026-10-12 [email protected] Roll Skia from c88b49d1d6c7 to 9b6ceba4728d (4 revisions) (flutter/flutter#194226)
2026-10-12 [email protected] Migrate remaining test to macOS 26 (flutter/flutter#193825)
2026-10-12 [email protected] Roll Dart SDK from 047ca322aa9c to 221363557163 (1 revision) (flutter/flutter#194219)
2026-10-12 [email protected] [flutter_tools] Include dev_dependencies hooks for release integration tests (flutter/flutter#193436)
2026-10-12 [email protected] Roll Skia from d8afad1b1829 to c88b49d1d6c7 (1 revision) (flutter/flutter#194198)
2026-10-12 [email protected] Roll Skia from b23ddbff1265 to d8afad1b1829 (4 revisions) (flutter/flutter#194195)
2026-10-11 [email protected] Roll Skia from a168863e44ec to b23ddbff1265 (1 revision) (flutter/flutter#194185)
2026-10-11 [email protected] Roll Skia from 0c1d93abfa04 to a168863e44ec (1 revision) (flutter/flutter#194181)
2026-10-11 [email protected] iOS: Re-enable rendering on willEnterForeground (flutter/flutter#191350)
2026-10-11 [email protected] Roll Skia from 93c9d3ffda25 to 0c1d93abfa04 (1 revision) (flutter/flutter#194179)
2026-10-11 [email protected] Remove more instances of deprecated `withOpacity` (flutter/flutter#193559)
2026-10-11 [email protected] Fix another `parameter_assignments` warning (flutter/flutter#193669)
2026-10-11 [email protected] Roll Skia from 3136abef8f58 to 93c9d3ffda25 (1 revision) (flutter/flutter#194169)
2026-10-11 [email protected] [Impeller] Guard the sampler library caches with a mutex (flutter/flutter#193738)
2026-10-11 [email protected] Roll Dart SDK from e9c89888bcc1 to 047ca322aa9c (1 revision) (flutter/flutter#194157)
2026-10-10 [email protected] Roll Dart SDK from 787baa8aae78 to e9c89888bcc1 (2 revisions) (flutter/flutter#194141)
2026-10-10 [email protected] Fix OverlayPortal layout in shrink-wrapped overlays (flutter/flutter#193079)
2026-10-10 [email protected] Roll Skia from 353076e27b1c to 3136abef8f58 (1 revision) (flutter/flutter#194130)
2026-10-10 [email protected] Roll Dart SDK from 88a07589b1ff to 787baa8aae78 (1 revision) (flutter/flutter#194124)
2026-10-10 [email protected] Route windowing view lookups through WidgetsBinding (flutter/flutter#192666)
2026-10-10 [email protected] Roll Dart SDK from 2a06cab34715 to 88a07589b1ff (1 revision) (flutter/flutter#194117)
2026-10-10 [email protected] Roll Skia from f9043b7aa798 to 353076e27b1c (2 revisions) (flutter/flutter#194115)
2026-10-10 [email protected] Refactored PipelineLibraryGLES (flutter/flutter#193985)
2026-10-09 [email protected] add shorthands for scroll physics subclasses in framework (flutter/flutter#193082)
2026-10-09 [email protected] Roll Dart SDK from ba889e3cee8a to 2a06cab34715 (1 revision) (flutter/flutter#194105)
2026-10-09 [email protected] Roll Skia from 5ea03d8a53a6 to f9043b7aa798 (2 revisions) (flutter/flutter#194099)
2026-10-09 [email protected] Add docs for using bb and led with LUCI (flutter/flutter#193859)
2026-10-09 [email protected] Roll Skia from e329bb617820 to 5ea03d8a53a6 (5 revisions) (flutter/flutter#194087)
2026-10-09 [email protected] Roll Packages from 54706bd to d8d9e97 (5 revisions) (flutter/flutter#194080)
2026-10-09 [email protected] Move the Vulkan wrapped-texture helper out of the GPU surface (flutter/flutter#193001)
2026-10-09 [email protected] Roll Skia from 3e54bcf4c963 to e329bb617820 (1 revision) (flutter/flutter#194078)
2026-10-09 [email protected] Roll Dart SDK from 23f0308f9af8 to ba889e3cee8a (2 revisions) (flutter/flutter#194077)
2026-10-09 [email protected] Bump dartdoc to 9.0.11 (flutter/flutter#194076)
...

… 10_0 (flutter#194321)

Adds a test that runs the existing engine_integration_golden_test, but
with a D3D11 10_0 feature level cap. This is the follow up PR mentioned
in flutter#194114. Together these two
PRs gives us basic smoke testing coverage on 10_0 of the rendering
pipeline from Flutter app code, through Impeller rendering, to
presenting on the swapchain.

The feature level cap is read directly from the environment variables by
`windows/flutter_project_bundle.cc`. I don't know if this is the best
way to do this, because it's doing it different than other "engine
switches". Reading the environment variable directly is similar to how
`FLUTTER_LINUX_RENDERER` is read in the [linux
embedder](https://github.com/flutter/flutter/blob/debf408b622cb24c5992cff3d9c9142be79eab40/engine/src/flutter/shell/platform/linux/fl_engine.cc#L696).
An alternative would be to expose it as a flag in flutter tool and
piping it all the way through to here. That would be a lot more changes
and plumbing, and it makes the flag a little more public, but if you
prefer that way, let me know and I'll change this.

I ran this locally on a Windows VM, with a `host_debug_unopt` engine
build. It caught flutter#194317, so
it's already acting as a useful 10_0 smoke test. I confirmed that with
the fix (flutter#194319), it runs and
passes as expected (but without doing a real skia-gold validation
check).

Part of flutter#192899

## 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].
- [x] 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.
- [ ] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

If this change needs to override an active code freeze, provide a
comment explaining why. The code freeze workflow can be overridden by
code reviewers. See pinned issues for any active code freezes with
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…level 10_0 (flutter#194114)

Adds a parameter (only used in tests) to `egl::Manager` to cap ANGLE's
D3D11 feature level. Adds `compositor_opengl_angle_unittests.cc`, based
on
[`compositor_opengl_unittests.cc`](https://github.com/flutter/flutter/blob/97db29fcaa2aa757c8d86f06187b5268bf4eed4a/engine/src/flutter/shell/platform/windows/compositor_opengl_unittests.cc).
Unlike the existing tests, the new tests exercise the compositor with
real ANGLE instead of mocks.

The new tests exercise the compositor's backing store creation and
presenting. The tests run both at uncapped feature level and capped to
10_0. This emulates the case where
flutter#191978 resulted in a black
window.

Verified locally that when
flutter#192917 is reverted, the new
tests fail when running at feature level 10_0 and pass when running
without a feature level cap.

Part of flutter#192899:
- This PR exercises the OpenGL compositor and swapchain presenting
codepath on 10_0, verifying that the backing store framebuffer is valid
(GL_FRAMEBUFFER_COMPLETE) with no GL errors. This catches issues that
occur at the compositor level, like
flutter#191978.
- This would not catch issues where the rendering behavior of Impeller
is broken due to taking different code paths on 10_0 (e.g.
flutter#192918 resulting in different
BackdropFilter behavior because offscreen MSAA is unavailable with
10_0).
- I intend to follow up with a PR that extends our existing
[`engine_integration_golden_test.dart`](https://github.com/flutter/flutter/blob/38785ef8b19e2a1ee1303167074ec98f95f7cb5b/dev/integration_tests/engine_integration_golden_test/integration_test/engine_integration_golden_test.dart)
devicelab golden test, which currently [runs on
Windows](https://github.com/flutter/flutter/blob/38785ef8b19e2a1ee1303167074ec98f95f7cb5b/dev/devicelab/lib/tasks/integration_tests.dart#L242-L248),
to also run with feature level 10_0. These golden tests would catch
issues where our Impeller rendering is broken. Goldens do not catch
compositor level issues because the golden functionality reads its
images from Impeller, skipping the compositor portion of the rendering
pipeline.
- This PR, together with the anticipated follow up PR, will give us
basic smoke testing coverage on 10_0 of the rendering pipeline from
Flutter app code, through Impeller rendering, to presenting on the
swapchain.

## 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].
- [x] 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.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

If this change needs to override an active code freeze, provide a
comment explaining why. The code freeze workflow can be overridden by
code reviewers. See pinned issues for any active code freezes with
guidance.

**Note**: The Flutter team is currently trialing the use of [Gemini Code
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… 10_0 (flutter#194321)

Adds a test that runs the existing engine_integration_golden_test, but
with a D3D11 10_0 feature level cap. This is the follow up PR mentioned
in flutter#194114. Together these two
PRs gives us basic smoke testing coverage on 10_0 of the rendering
pipeline from Flutter app code, through Impeller rendering, to
presenting on the swapchain.

The feature level cap is read directly from the environment variables by
`windows/flutter_project_bundle.cc`. I don't know if this is the best
way to do this, because it's doing it different than other "engine
switches". Reading the environment variable directly is similar to how
`FLUTTER_LINUX_RENDERER` is read in the [linux
embedder](https://github.com/flutter/flutter/blob/debf408b622cb24c5992cff3d9c9142be79eab40/engine/src/flutter/shell/platform/linux/fl_engine.cc#L696).
An alternative would be to expose it as a flag in flutter tool and
piping it all the way through to here. That would be a lot more changes
and plumbing, and it makes the flag a little more public, but if you
prefer that way, let me know and I'll change this.

I ran this locally on a Windows VM, with a `host_debug_unopt` engine
build. It caught flutter#194317, so
it's already acting as a useful 10_0 smoke test. I confirmed that with
the fix (flutter#194319), it runs and
passes as expected (but without doing a real skia-gold validation
check).

Part of flutter#192899

## 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].
- [x] 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.
- [ ] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

If this change needs to override an active code freeze, provide a
comment explaining why. The code freeze workflow can be overridden by
code reviewers. See pinned issues for any active code freezes with
guidance.

**Note**: The Flutter team is currently trialing the use of [Gemini Code
Assist for
GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code).
Comments from the `gemini-code-assist` bot should not be taken as
authoritative feedback from the Flutter team. If you find its comments
useful you can update your code accordingly, but if you are unsure or
disagree with the feedback, please feel free to wait for a Flutter team
member's review for guidance on which automated comments should be
addressed.

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