[Webkit-unassigned] [Bug 270567] Incorrect filter primitive area with tiling

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sat Sep 7 11:57:25 PDT 2024


https://bugs.webkit.org/show_bug.cgi?id=270567

--- Comment #10 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
We conflate the dirty rect with the primitiveSubregion in:
RenderLayerFilters::beginFilterEffect:
  m_filterRegion is clipped to the dirty rect, and feeds into filter.setFilterRegion() and GraphicsContextSwitcher::create()'s sourceImageRect

createReferenceFilter():
  filterRegion.intersect(inflatedDirtyRect)

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