RESOLVED FIXED 261101
[TextureMapper] Shrink texture before applying large radius blur 
https://bugs.webkit.org/show_bug.cgi?id=261101
Summary [TextureMapper] Shrink texture before applying large radius blur
Akihiro Kiuchi
Reported 2023-09-04 00:27:23 PDT
This is a sub issue of https://bugs.webkit.org/show_bug.cgi?id=231653 As Bug231653 pointed out, current blurring causes a mosaic artifacts when the blur radius is large. The promissing solution is to shrink the texture before applying blur filter and expand again, which seems a common technique and skia uses it as well. ref: https://github.com/google/skia/blob/0f9e50daa87997d376bf5fb60b06ab5b15c63ed9/src/gpu/ganesh/GrBlurUtils.cpp#L2580-L2586. This is the main sub issue of Bug231653 but separeted from Bug231653 because But231653 will includes additional refactoring issue and performance issue.
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Akihiro Kiuchi
Comment 1 2023-09-04 20:03:50 PDT
Pull request: https://github.com/WebKit/WebKit/pull/17419
EWS
Comment 2 2023-09-05 13:08:50 PDT
Committed 267646@main (57b05d82091b): <https://commits.webkit.org/267646@main> Reviewed commits have been landed. Closing PR #17419 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2023-09-05 13:09:15 PDT
<rdar://problem/115004547>
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