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[Impeller] blur: drop eighth downsample barrier#50405
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gaaclarke merged 2 commits intoflutter:mainfrom Feb 8, 2024
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[Impeller] blur: drop eighth downsample barrier#50405gaaclarke merged 2 commits intoflutter:mainfrom
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| // This constant was picked by looking at the results in to make sure no | ||
| // shimmering was introduced. |
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done, fixed and expanded
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flutter/engine@f53fbd8...3fb60b8 2024-02-08 [email protected] [Impeller] blur: drop eighth downsample barrier (flutter/engine#50405) 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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issue: flutter/flutter#142990
I pushed this value as low as I dared to go and ended up with a kernel size of 41 (radius 20). This means the range of sigma ~60 to ~70 will now be 1/16th scalar instead of 1/8th.
Here is the new downsample rate versus sigma on a 2x display.
before
after
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.