DanS 4dc6b2ef8f perf(market): capture the portfolio backdrop once on open (+resize), not every frame ...

Switch the live-blur behind the modal from a per-frame capture (which flickered from
per-frame re-blur non-determinism) to capture-once-on-open, re-captured only on resize.

- Insert the acrylic live-capture callback into the overlay draw list ONLY for a few
  frames on open and whenever the viewport size changes; other frames reuse the frozen
  blurred snapshot (blurCacheValid_), so there's no per-frame capture/re-blur cost. State:
  s_pf_was_open (reset on close), s_pf_capture_frames, s_pf_capture_w/h.

Two fixes from an adversarial review of the timing/pipeline interaction:
- Do NOT override the backdrop blurRadius to 40. applyBlur caches one blurred buffer
  keyed on radius, shared with every glass panel (market cards + the modal preview card,
  radius ~30). A different radius thrashed that cache every frame and made the backdrop
  sample the wrong blur, defeating the frozen-blur guarantee. Using the theme card's
  radius keeps one blur serving all surfaces, frozen.
- Skip the blur on the overlay's first frame (allowBlur=false) — the live content isn't
  captured until that frame's render, so blurring then would show stale/background pixels
  for one frame; draw the plain opaque scrim instead.

Compiles on OpenGL (Linux) + DX11 (Windows). Needs on-device visual verification.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-07-03 21:05:16 -05:00

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