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[Impeller] reland foreground blend optimizaiton, fix advanced blend optimization. #51938
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… blend optimization. (flutter/engine#51938)
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…146364) flutter/engine@6a478d6...da995a1 2024-04-05 [email protected] [Impeller] reland foreground blend optimizaiton, fix advanced blend optimization. (flutter/engine#51938) 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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) flutter/engine@6a478d6...da995a1 2024-04-05 [email protected] [Impeller] reland foreground blend optimizaiton, fix advanced blend optimization. (flutter/engine#51938) 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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Reverted in #51679 due to flutter/flutter#144109
The foreground blend cases where using the coverage rect to determine the resulting position and UVs. this only worked if the CTM was scale translate, in rotation/skew/perspective cases the coverage rect is incorrect for choosing the texture coordinate position. Instead of positioning w/ coverage, use the snapshot transform which includes the scale/translation and correctly applies other transforms.