Chinmay Garde df4a467fad Reland "Lift restriction that embedders may not trample the render thread OpenGL context in composition callbacks." (flutter/engine#16711) ...

This reverts commit 79c230fc7b9aa3bb13dcf38cdfe213256c73028a with the following changes to accommodate an embedder for whom the original optimizations caused issues:

* Ensure stable order in the backing stores presented to the embedder. This is a pessimization that will be reverted when the embedder migrates. Tracked in  https://github.com/flutter/flutter/issues/51228
* Forego the optimization where the unused layers would be collected before allocation of new layers needs to happen. This is a pessimization that will be reverted when the embedder migrates. Tracked in  https://github.com/flutter/flutter/issues/51229

More context in b/146142979.

2020-02-24 11:48:32 -08:00

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src/flutter

Reland "Lift restriction that embedders may not trample the render thread OpenGL context in composition callbacks." (flutter/engine#16711)

2020-02-24 11:48:32 -08:00