flowchart TD
    A["D3D12: IASetVertexBuffers<br/>address, SizeInBytes, stride per slot"] --> S["draw state: the views<br/>(va, size, stride) x 20"]
    P["CreateGraphicsPipelineState<br/>input layout: slot, offset, format"] --> T["SPIRV-Cross MSL vertex function"]
    T --> G["guard_vertex_fetches:<br/>stage_in copied, each input checked"]
    S -->|"upload, bind at buffer 28<br/>(ExecuteIndirect: the record's own)"| M
    G --> M["Metal vertex function"]
    M --> I{"index x stride + offset + size<br/>&le; view size?"}
    I -->|yes| F["Metal's fetch"]
    I -->|no| Z["0 in the format's components,<br/>the rest of (0, 0, 0, 1)"]