Replace the blit cascade in record_blur with shader-based dual-Kawase,

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matching the OpenGL backend's algorithm. The blit cascade was a much weaker
   filter that degenerated badly on thin surfaces.

   The new path adds blur.vert / blur_down.frag (5-tap) / blur_up.frag (8-tap),
   a single-binding blur descriptor set layout, and per-format down/up pipelines.
   BLUR_SCRATCH_USAGE gains COLOR_ATTACHMENT so the scratch images can be both
   sampled and rendered into. Cache hit fast path and masked composite are
   unchanged.

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entailz 2026-05-20 18:44:47 -07:00

parent fa0ab2f1fa

commit e2de688324

12 changed files with 707 additions and 176 deletions

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