mirror of
https://github.com/boykopovar/AnyPS5.git
synced 2026-11-07 13:39:55 +00:00
Yunus Shaikh
7d6e968d6b
The Grinch: Christmas Adventures (PPSA07656) binds a two-sample
D32_SFLOAT_S8_UINT target whose stencil is a plane of its own and whose
HTILE is depth-only (DB_STENCIL_INFO.TILE_STENCIL_DISABLE), so HTILE
holds no stencil state. Every byte of that plane is the clear stencil
when the target is first bound. The import refused it ("native
multisample stencil import requires HTILE stencil metadata") and the
title stopped before its first present.
With a depth-only HTILE the stencil is uncompressed in its plane, so the
plane is its own proof: the import scans it once and accepts the target
when every byte equals DB_STENCIL_CLEAR. The depth keeps its HTILE clear
proof. The plane is already one of the import's ranges, accessible,
watched, generation-checked, guarded from guest publication and kept
apart from the depth and HTILE ranges, so a later CPU or GPU write to it
refuses sampling like a write to the depth. The host image is created
cleared to the clear stencil. The plane's base keeps the 64 KiB
alignment of the depth plane: both use SW_64KB_Z_X, the decode takes
the pipe/bank XOR from the depth base's low 16 bits and masks both bases.
A whole HTILE fill of such a target is proven for the depth only and
clears only the host depth: the stencil plane is untouched by the fill
and still proven unchanged since the import.
A stencil plane that is not all clear, a stencil in neither HTILE nor
its own plane, D16S8 and HTILE words that do not prove a clear keep
their refusals.
Tested: agc_driver_native_depth_separate_stencil imports a four-sample
target (two and eight where the device has them), samples the clear
depth, stencil-tests the clear stencil, and refills a depth-only HTILE
keeping a replaced stencil; one stencil byte not clear, a later stencil
write and an unwatched plane are refused. Without the import change the
target refuses "native multisample stencil import requires HTILE
stencil metadata"; without the fill change the refilled target loses
its stencil.