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Jim Graham 820d1dbbde add non-rendering operation culling to DisplayListBuilder (flutter/engine#41463) 
This optimization avoids recording unnecessary render operations that will not affect the output and also eliminates the need for "draw detection" mechanisms like `DlOpSpy` and `CanvasSpy` by remembering if any non-transparent operations were included. The `DlOpSpy` unit tests were updated to check if the results from that object match the new `DisplayList::affects_transparent_surface()` method.

Fixes https://github.com/flutter/flutter/issues/125338

In addition, this change will unblock some other Issues:

- https://github.com/flutter/flutter/issues/125318
- https://github.com/flutter/flutter/issues/125403
2023-05-14 02:14:33 +00:00
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src/flutter
add non-rendering operation culling to DisplayListBuilder (flutter/engine#41463)
2023-05-14 02:14:33 +00:00