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SurfaceFrame root DisplayLists will no longer prepare an RTree #48422
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The line in question (where SurfaceFrame creates the DisplayListBuilder) was originally added as part of #41606 but evaluating the result of that fix amended by this change shows that the fix not depend on the RTrees in the root frame canvas. |
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…139106) flutter/engine@8b100cc...5ffe1f4 2023-11-27 [email protected] Update `HeaderFilterRegex` once and for all. (flutter/engine#48145) 2023-11-27 [email protected] SurfaceFrame root DisplayLists will no longer prepare an RTree (flutter/engine#48422) 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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…lutter#139106) flutter/engine@8b100cc...5ffe1f4 2023-11-27 [email protected] Update `HeaderFilterRegex` once and for all. (flutter/engine#48145) 2023-11-27 [email protected] SurfaceFrame root DisplayLists will no longer prepare an RTree (flutter/engine#48422) 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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The root slice of a surface frame was requesting the construction of an RTree from its DisplayList when it was built from a layer tree, but since the layer tree already does branch culling, it would not benefit from any further culling during
DisplayList::Dispatch. Further, if there are platform views present in the layer tree then they will need an RTree to accurately convey "pixel ownership" information to the platform, but the root slice lives below any and all platform views, so it is the only slice that doesn't need an RTree for that case.The cost of having an RTree in that slice was the accumulation of information and lists of rects that would never prove useful.