Module directx 

The same for the DirectX and Vulkan backends: their repr(C) uniform / probe structs + GPU-timing slot arithmetic (mirrored in the HLSL / GLSL shaders). Backend-specific but device-free (plain repr(C), no windows/ash types), so they compile unconditionally and their layout tests count toward coverage. The DirectX / Vulkan backends (concinnity-device) re-export them under their own directx / vulkan.

Modules

pass_timing

Per-pass GPU timing on D3D12 via TIMESTAMP queries. The slot layout is the shared one (crate::render::pass_timing); this module only re-exports it so the backend keeps its crate::render::directx::pass_timing path.

uniforms

repr(C) uniform / root-constant structs only the DirectX frame encoders bind (cbuffer / root-constant layouts). Each is mirrored field-for-field in an .hlsl shader under directx/shaders/.