PS5 OpenGL Showcase (PPSA99005)

[jackthereaper2006]

PS5 OpenGL Showcase (PPSA99005), blackbearreloaded/ps5-opengl v1.0.2 from the homebrew catalog (GPL-3.0, sha256 37a0ef4eca3f43f1f85827d3e2edcbd32ccf5e0ecbcee8da86465f51c902d388). eboot.bin and sce_module/libc.prx were unwrapped before relinking, and it was relinked with --registry.

Linux, AMD RADV RENOIR (Ryzen 5 PRO 5650U integrated graphics, GCN 5), Mesa 26.2.4, CachyOS kernel 7.2.9:

build	stage	what is wrong
main d92a8dad3	Presents, 3 FPS (389 ms per frame)	the 8192 instances render as a white bloom cloud with black specks
main 0afa6a607 + #6290	Presents, 2–3 FPS (380–437 ms per frame)	none seen: the instances render as in the author's screenshot

• The instance pixel shader computes its normal with dFdx/dFdy (main.c:259). On RADV, DPP quad_perm reads from helper lanes were wrong until fix(shader): read quad_perm DPP lanes in pixel shaders through quad operations #6290.
• On lavapipe (Mesa 26.2.4), main renders the instances correctly, at about 1 FPS (1750 ms per frame).
• The frame time is perf: PS5 OpenGL Showcase (PPSA99005) at 3 FPS: the unused second slice of each color target overlaps the next target, so every pass writes back and re-uploads #6189. The probe there (lastSlice != 0) brings it to 231–308 ms per frame on this machine and does not change the instances.

Frames (APS5_DUMP_FRAMES dumps of the title's own display buffer, 960×540 at the default APS5_DUMP_SCALE of 4):

main, RADV	main + the fix, RADV
main, lavapipe	main, RADV, APS5_SKIP_SHADER=229255000

Full-size files: https://gist.github.com/jackthereaper2006/aec623dfe08f2a6d8e5207ac3e2a209b. Reference: the author's screenshot.

Runs: 60 s, SDL_AUDIODRIVER=dummy, APS5_NO_PAD_INPUT=1, no network, empty shader caches.

AI-assisted: yes (Claude Code).

[DavidSamir]

macOS status: Apple M2, MoltenVK 1.4.2 (LunarG Vulkan SDK 1.4.363), macOS 26.7.1, x86-64 under Rosetta. Catalog release 1.0.2, sha256 checked.

The tree is main ce991f1 plus the macOS runtime work that isn't on main yet: #4627, #4630, #6124, the macOS relinker PRs and mugurc's port branches. Then the title needs these open pull requests on macOS, in order:

1. fix(agc): draw a last provoking vertex that no pixel input sees without the extension #6741: its first stop is last provoking vertex requires VK_EXT_provoking_vertex with provokingVertexLast enabled. The draw is a triangle fan with one smooth input; its only Flat decoration is on BuiltIn SubgroupLocalInvocationId.
2. fix(shader): interpolate 16-bit values with 64-bit integers on devices without Float64 #6767: next is 64-bit float instructions need the Float64 capability. Its 16-bit interpolation (FPInterpolateF16) is computed in f64, and Apple GPUs have none.
3. With both, it stops on viewport depth outside [0, 1] requires VK_EXT_depth_range_unrestricted. That's the case feat(agc): remap a viewport depth range the device cannot express into the vertex shader #4650 addresses, and feat(agc): remap a viewport depth range the device cannot express into the vertex shader #4650 conflicts with main at the moment.

Each step was 2 runs of 2.

AI-assisted: yes