The reconstruction added in the previous commit was env-only (PSX_FMV_FILTER),
which is fine for trying it out and no good for shipping it. Promote it to
[video] fmv_filter in both game.toml and settings.toml, spelled
"nearest" | "bilinear" | "sharp" | "bicubic" (default bicubic), and push the
resolved value to the renderer instead of having the renderer read getenv.
PSX_FMV_FILTER still overrides for a single run without touching the user's
settings, which is what an env knob is actually for.
Also bridges the value to recomp-ui's launcher settings in both directions so
the Display settings row round-trips: recomp-ui stores it 1-based (0 = unset,
so a host predating the field gets the default rather than Nearest), the
config enum is 0-based, and the conversion is confined to two helpers at the
boundary.
Verified end to end: with fmv_filter = "bilinear" in settings.toml the
presented pixels match the bilinear reference exactly (mean |dx| 0.930,
hard-step fraction 0.14%), where the default build produces the bicubic
numbers (1.038 / 0.34%).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Alex Vanderveen
a643fab71d