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[Impeller] Fix the clip replay mechanism. - #51173
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Do we have a test case (golden or otherwise) that will cover this? |
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basically, do we have a golden of this that was rendering incorrectly before but renders correctly now - perhaps on Metal/Vulkan backends too so its not just the broken gaussians on GLES? |
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I think this change only impacts GLES in practice, since In terms of testing GLES: |
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Sounds good to me |
flutter-team-archive/engine@4001881...62cf93b 2024-03-04 [email protected] [Impeller] Fix the clip replay mechanism. (flutter-team-archive/engine#51173) 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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Clips were being ignored whenever MSAA backdrop restores were being done by attachment load.
Unblocks the StC flag flip: #50856
Note that the new Gaussian blur does not currently work on GLES, and it's expected that this will cause backdrop blurs to cut a transparent hole wherever the backdrop blur should render.
This happens because the gaussian blur renders as fully transparent black (among other things, it uses arrays of structs for the uniforms, which is unsupported in GLES). Then, the backdrop blur renders the blur's result with the
Sourceblend mode, cutting out a hole in this case.