Issue Link

#150546

Target

stable

PR Link

Cherry pick PR: flutter-team-archive/engine#54517
Original PR: flutter-team-archive/engine#54329

Changelog Description

Previously, Flutter Windows would always use format GL_RGBA8 to create textures. On older devices that do not support this texture format, this would fail.

Now, Flutter Windows uses the format GL_BGRA_EXT format if the device has extension GL_EXT_texture_format_BGRA8888, or otherwise it'll fallback to GL_RGBA.

Impacted Users

End-customers on older Windows devices cannot run apps built using Flutter Windows 3.22 or 3.24.

Impact Description

For affected end-users, the Flutter Windows app is completely broken: users see a black screen.

Workaround

The app developer can switch to Flutter Windows 3.21 or older.

Risk

medium

Test Coverage

no

Validation Steps

None of our devices reproduce this bug. Our existing tests cover this bug and would've reproduced the issue if ran on an affected device.

We verified by asking affected customers to run an app with the fix and confirming it works as expected (here, here, and more).