Loïc Sharma ce61eda70c [Windows] Ensure window is shown (#127046) ... ## Background The Windows runner has a race at startup: 1. **Platform thread**: creates a hidden window 2. **Platform thread**: launches the Flutter engine 3. **UI/Raster threads**: renders the first frame 4. **Platform thread**: Registers a callback to show the window once the next frame has been rendered. Steps 3 and 4 happen in parallel and it is possible for step 3 to complete before step 4 starts. In this scenario, the next frame callback is never called and the window is never shown. As a result the `windows_startup_test`'s test, which [verifies that the "show window" callback is called](1f09a8662d/dev/integration_tests/windows_startup_test/windows/runner/flutter_window.cpp (L60-L64)), can flake if the first frame is rendered before the show window callback has been registered. ## Solution This change makes the runner schedule a frame after it registers the next frame callback. If step 3 hasn't completed yet, this no-ops as a frame is already scheduled. If step 3 has already completed, a new frame will be rendered, which will call the next frame callback and show the window. Part of https://github.com/flutter/flutter/issues/119415 See this thread for alternatives that were considered: https://github.com/flutter/engine/pull/42061#issuecomment-1550080722		2023-05-19 22:25:55 +00:00
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flutter	Add Windows and Linux support to the 'layers' example (#126105)	2023-05-06 00:45:19 +00:00
runner	[Windows] Ensure window is shown (#127046)	2023-05-19 22:25:55 +00:00
.gitignore	Add Windows and Linux support to the 'layers' example (#126105)	2023-05-06 00:45:19 +00:00
CMakeLists.txt	Add Windows and Linux support to the 'layers' example (#126105)	2023-05-06 00:45:19 +00:00