%% one draw with the depth bounds test on an M1 (no native test before Apple10).
flowchart TD
    DRAW["Draw with DepthBoundsTestEnable"] --> VALID{"snapshot of the depth<br/>attachment still valid?"}
    VALID -->|"no: a depth write, another<br/>command, or new attachments"| COPY["end the render pass;<br/>compute copy of the depth range<br/>into a 2DArray (or MS array)"]
    VALID -->|yes| PASS
    COPY --> PASS["render pass: bind the copy at texture 0,<br/>float4(min, max, enabled, 0) at buffer 30"]
    PASS --> EARLY{"early fragment tests<br/>and an occlusion query?"}
    EARLY -->|no| FRAG
    EARLY -->|yes| COUNT["count-only draw: same VS,<br/>generated bounds function, no writes"]
    COUNT --> REAL["the real draw,<br/>visibility off"]
    REAL --> FRAG
    FRAG["fragment entry (SPIRV-Cross patch 0034):<br/>read the stored depth per sample;<br/>outside [min, max] → discard,<br/>or clear the sample's bit in sample_mask"]