tree 6dc70032eda8ca2fbb02cb30974793233783e832
parent 5720dead6bfd85323f2f5d665daf4a40e627520b
author Jonah Williams <jonahwilliams@google.com> 1691005901 -0700
committer GitHub <noreply@github.com> 1691005901 +0000
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[framework] lerp images in a save layer. (#131703)

Without a saveLayer, the BlendMode.plus will add itself to the backdrop and not just the previous image. Pushing without tests to see if existing goldens fail, but otherwise I have some good examples locally.

This is necessary uncondtionally, and lerping lerped images has the same issue.

Fixes https://github.com/flutter/flutter/issues/131617

### Before

![flutter_02](https://github.com/flutter/flutter/assets/8975114/1e783285-2fc2-429f-9fd8-6d04d4a155e1)

### After

![flutter_03](https://github.com/flutter/flutter/assets/8975114/3d08b187-26aa-4471-926d-e9ed5946a206)