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[Impeller] reland: write directly to device buffer. #49691
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…141316) flutter/engine@a045134...431d64d 2024-01-10 [email protected] [Impeller] reland: write directly to device buffer. (flutter/engine#49691) 2024-01-10 [email protected] Roll Dart SDK from c2862d44e108 to 9f5a6a2ccace (1 revision) (flutter/engine#49689) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Please CC [email protected],[email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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Reland of #49505
part of flutter/flutter#140804
We can't use the existing host buffer abstraction as that requires us to collect all allocations up front. By itself, this isn't sufficient for #140804 , because we'll need a way to mark ranges as dirty and/or flush if we don't have host coherent memory. But by itself this change should be beneficial as we'll create fewer device buffers and should do less allocation in general.
The size of the device buffers is 1024 Kb, somewhat arbitrarily chosen.