flowchart TD
    D["D3D12 draw<br/>StartVertexLocation or BaseVertexLocation,<br/>StartInstanceLocation"] --> M["Metal draw<br/>baseVertex, baseInstance"]
    H["HLSL (SM 6.8)<br/>SV_StartVertexLocation,<br/>SV_StartInstanceLocation"] --> X["dxil-spirv<br/>BaseVertex, BaseInstance"]
    X --> S["SPIRV-Cross<br/>[[base_vertex]], [[base_instance]]"]
    M --> S
    S --> Q{"does the vertex shader<br/>read the start instance?"}
    Q -->|"no"| O["root offsets: baseInstance carries<br/>the root block offset"]
    Q -->|"yes"| P["baseInstance stays the<br/>D3D12 start instance"]