flowchart TD
    D["draw"] --> Q{"pixel shader writes depth,<br/>a depth buffer is bound,<br/>a viewport range isn't [0, 1]?"}
    Q -->|"no (most draws)"| P["plain pipeline<br/>Metal clamps to [0, 1],<br/>which is right here"]
    Q -->|yes| V["clamp variant<br/>made on first use"]
    V --> B["per-draw buffer 30<br/>words 24+: (min, max)<br/>for each viewport"]
    B --> F["fragment function ends with<br/>depth = clamp(depth, min, max)<br/>of its viewport index"]
    P --> I["indirect command<br/>buffers allowed"]
    F --> N["no indirect command buffers:<br/>ExecuteIndirect runs per record"]