Shokunin 0e3c53720b GL: opt-in accurate blending + PS1 blend/mask accuracy test ...

Verifies the four PS1 semi-transparency modes, set-mask, mask check and
texel STP at 4x internal resolution with PGXP depth on and off, directly
and on the render thread, against the PS1 formulas and the software
rasterizer (new gl_blend_accuracy_test).

Finding: with the historical surface bases (fills and texels stored as
k*255/31, everything else as k*8) single-layer blends are off by one 5-bit
step in places (1312 of the test's checked pixels, e.g. B+F/4 over a fill).
[video] accurate_blending = true stores every VRAM write as k*8 so GL's
8-bit blend truncated by the readback is exactly the PS1 arithmetic; whites
of fills/texels then present as 248 like uploads already do. Default off.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-09 19:18:16 -07:00

..

OpenBIOS_dispatch.c

Add guarded native draw replay, motion interpolation and stable world filtering

2026-10-03 23:46:25 -07:00

OpenBIOS_full.c

guest_cycle_scale: one CPU charge for every tier, declarative gate, rollback

2026-10-07 21:41:39 -07:00

OpenBIOS.emitter.sha

GL: opt-in accurate blending + PS1 blend/mask accuracy test

2026-10-09 19:18:16 -07:00