Pegasus
1.7 KiB
Source polygon coordinate wrap
The optional source GPU profile now admits the complete sum of its signed 11-bit vertex and signed 11-bit drawing offset: -2048 through 2046. The old post-offset11-bit guard rejected valid source commands, including Pepsiman's partly offscreen GP02C packet after return 2288. Packet inputs stay intact.
Original gpu_polygon.cpp clips signed 11-bit Y and left X while retaining unwrapped X/Y for color and UV interpolation. The shared walker now preserves both X positions in the span callback. VRAM writes still use physical X and nine-bit Y. Sprite callbacks retain their existing coordinates. Source traversal order, oversize/degenerate rejection, other command admission, clipping-area bound and lifecycle guards remain in place. Values outside the possible vertex-plus-offset range remain rejected.
CLAIM / DERIVED-FROM: original Octoshock 2.3 DrawTriangle / DrawSpan, upstream a15b31a46bdac27d843d3ebbc5a860012d8452fb. This is source compatibility.
The authored CPU/MMIO fixture covers 12 ordinary, offscreen, wrapping and sign boundary geometries, all 3 texture depths, separate/overlapping texture data, and flat versus Gouraud+dither rendering. Two draws retain the cache. All 144 complete final 1 MiB VRAM hashes match stock 2.3. A leaf observer with the same 144 images records 288 command-work values; native O0/O2 match all of them. Inputs are authored ROM/RAM programs with a completion marker, not retail data or emulator state. The previously rejected coordinate case now has an admitted one-pixel work assertion. Full Pepsiman, native ending and unchanged Tekken regressions remain independent gates.
Run CTest -R tas_gpu_polygon_wrap for the native golden comparisons.