liyuqian 0e1cdfdcf5 Reland "Remove layer integral offset snapping" (flutter/engine#17915)
This reverts commit c72ff4a and relands #17712.

Fixes flutter/flutter#53288 and flutter/flutter#41654.

Together with #17791, this reland addresses some of Jim's concerns in the original PR #17712.

The major part of this PR is still the same as the original PR, and the performance / golden image impacts should be the same.
2020-05-01 15:01:42 -07:00
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Flow

Flow is a simple compositor based on Skia that the Flutter engine uses to cache recoded paint commands and pixels generated from those recordings. Flow runs on the raster thread and uploads information to Skia.