[AlxcBTW]

What

Taxi Chaos 2 (PPSA30279 v01.007.000, Unreal Engine) ends in its first menu frame:

compute shader 0x1a80598000: AGC graphics: storage image access to depth/stencil surface 0x30b6aa0000 is not implemented

The compute pass binds a 2048x2048 R11G11B10 storage image at the address of a 512x512 D32S8 surface the title rendered earlier. Engines alias transient targets, so this is the memory being reused, not a storage view of the depth plane. cachedStorageTexture refused every storage view whose address matched a depth or stencil plane.

A storage view whose extent differs from the newest depth surface at its address (same device) now takes the ordinary storage path. That is the rule boykopovar#1495 applies to sampled views. A view with the surface's own extent keeps throwing, as before.

The same shape is reported for 007 First Light in boykopovar#2523: a 512x1024 R16G16B16A16_SFLOAT storage view over a 128x128 D16 surface. A 128x128 R32_SFLOAT view of that surface, also reported there, has the surface's extent and still throws.

Related:

• feat(agc): depth planes sampled as 2D arrays, cubes and integer views boykopovar/AnyPS5#425 (open) seeds storage images from the depth plane. Its seed path throws for a view of another extent, so on top of feat(agc): depth planes sampled as 2D arrays, cubes and integer views boykopovar/AnyPS5#425 the same check would go in front of SeedStorageFromDepth. The two change the same lines in cachedStorageTexture and DepthSurface.cpp.
• fix(libSceAgcDriver): retire a depth surface once another writer covers its memory boykopovar/AnyPS5#454 (open) retires a depth surface once another writer covers its memory. This PR needs no writer evidence and only looks at the extent.
• fix(graphics): allow storage textures in reused depth memory boykopovar/AnyPS5#2904 (closed by the intake pause) also accepted views of the surface's extent in a format that cannot hold the plane.

Tested

Windows 11, WinLibs GCC 15.2.0 r7, Ninja Release, RTX 5070 Laptop (NVIDIA 616.92).

• New test agc_driver_depth_surface_storage_reuse (Vulkan): on a 128x128 D16 surface, a 512x1024 R32F storage view at its address is made as an ordinary storage image, and a 128x128 R32F view still throws. With the source change reverted, it fails with the original error: storage image access to depth/stencil surface 0x13cc4de0000 is not implemented.
• Related tests (agc_driver_graphics, agc_driver_depth_bias_per_face, agc_driver_pending_exact_surface, agc_driver_prepared_graphics, agc_driver_cmask_fast_clear, agc_pass_hazards): 6/6.
• check_conventions.py passes.
• In-game: Taxi Chaos 2 on Windows 11 with a Radeon 880M (ANYPS5_GPU=AMD) and fix(libkernel): map direct memory as write-watched private pages until it is aliased boykopovar/AnyPS5#2054 applied: the change gets the title past the stop above to the depth-cube sample feat(agc): depth planes sampled as 2D arrays, cubes and integer views boykopovar/AnyPS5#425 covers. That run used a local build with other patches, not this branch.

Checklist

• Based on current main; no other open PR implements the same functions
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed in TechnicalDebt
• No notes, investigation .md files or images added to the repository
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none
• AI-assisted: yes (Claude Code)

🤖 Generated with Claude Code

[AlxcBTW]

Covered by boykopovar#2904, which handles the other extent and the format.