Three changes that ride the existing PGXP dataflow engine:
- Arm the PGXP engine whenever a precision consumer needs it, not only when
a correction feature is on. gpu_pgxp_rederive_enable() derives the arm from
texture correction OR geometry correction OR the widescreen precise-NCLIP
opt-in, and every setter re-derives. Previously disabling both corrections
silently disabled the shadows precise_nclip depends on.
- gte_nclip: when the sub-pixel shadow of all three SXY FIFO entries is live,
take the winding SIGN from the exact double cross product and keep the
hardware integer magnitude. The X-squash scales areas by a positive factor,
so only integer rounding ever flips a sign; this removes both the vanished
trackside signs and the per-frame tile flicker at wide aspects without any
epsilon tolerance. The producer clamps shadow coords to +/-4096 px so a
projection blowup cannot wrap the 16.16 int32.
- Clamp rescue (prepare_precise_triangle): a vertex parked exactly on a GTE
saturation rail (+/-1024) is hardware-mangled; when the validated dataflow
shadow knows its true position, rasterize with that instead. Kills the
"polygon spike" streak class that 4:3 framing plus CRT overscan hid. Every
in-range vertex stays native, so normal geometry is bit-identical.
- dirty_ram_interp: fire psx_mod_function_entry on interp dispatch so
function-entry mod hooks do not depend on which backend executes a
mod-patched page.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
tetrisgm
249057f93f