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Add a CoreML rung on macOS

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The macOS ladder was the CPU provider alone, with CoreML listed as a gap.
It is now CoreML, then the CPU, then tract — unmeasured, since nobody here
has a Mac, and safe to ship unmeasured because the probe's clock rejects a
CoreML slower than the CPU and `attempt` refuses one that crashes.

- `Rung::CoreMl`, a compiling rung like TensorRT: an ML Program with every
  compute unit allowed, falling back to the CPU until each model's program
  is built. The embedder stays on the CPU, as on the Hexagon (§7).
- The cache is one directory per model and runtime version. CoreML keys a
  model committed from memory on its input and node names, not its
  weights (ONNX Runtime 1.29, coreml_execution_provider.cc), so two
  exports of one architecture would otherwise share a program.
- The fingerprint on macOS is the chip and the OS release, which ships
  CoreML.
- The desktop looks for the runtime in the bundle's Contents/Frameworks
  and Homebrew's prefixes; fetch-desktop-runtime.sh on a Mac downloads
  ONNX Runtime 1.29.0 for Apple silicon, which carries CoreML.

docs/dev/macos.md says what exists, how to build it, and which log lines
to ask a Mac user for.
This commit is contained in:
dtourolle
2026-10-03 16:50:37 -04:00
parent 872e35670c
commit c73743394f
10 changed files with 283 additions and 19 deletions
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docs/dev/traceability.md
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@@ -146,7 +146,7 @@ _None._
| FR-PLAT-LIN-2 | [`platform/dr-plat/src/display.rs:1`](../../platform/dr-plat/src/display.rs#L1), [`platform/dr-plat/src/display/wayland.rs:1`](../../platform/dr-plat/src/display/wayland.rs#L1), [`platform/dr-plat/src/display/x11.rs:1`](../../platform/dr-plat/src/display/x11.rs#L1) |
| FR-PLAT-WIN-1 | [`platform/dr-plat/src/dirs.rs:1`](../../platform/dr-plat/src/dirs.rs#L1) |
| FR-PLAT-WIN-2 | [`apps/darkroom-desktop/build.rs:1`](../../apps/darkroom-desktop/build.rs#L1), [`apps/darkroom-desktop/src/main.rs:6`](../../apps/darkroom-desktop/src/main.rs#L6), [`ui/dr-ui/src/launch_ui.rs:937`](../../ui/dr-ui/src/launch_ui.rs#L937) |
| FR-PLAT-WIN-3 | [`apps/darkroom-desktop/src/main.rs:19`](../../apps/darkroom-desktop/src/main.rs#L19) |
| FR-PLAT-WIN-3 | [`apps/darkroom-desktop/src/main.rs:35`](../../apps/darkroom-desktop/src/main.rs#L35) |
| FR-RAW-1 | [`core/dr-decode/src/lib.rs:266`](../../core/dr-decode/src/lib.rs#L266), [`core/dr-types/src/lib.rs:135`](../../core/dr-types/src/lib.rs#L135), [`core/dr-types/src/lib.rs:206`](../../core/dr-types/src/lib.rs#L206) |
| FR-RAW-2 | [`core/dr-decode/src/decoder.rs:1`](../../core/dr-decode/src/decoder.rs#L1), [`core/dr-decode/src/decoder.rs:26`](../../core/dr-decode/src/decoder.rs#L26), [`core/dr-decode/src/decoder.rs:59`](../../core/dr-decode/src/decoder.rs#L59), [`core/dr-decode/src/decoder.rs:95`](../../core/dr-decode/src/decoder.rs#L95), [`ui/dr-ui/src/decoder_seam.rs:185`](../../ui/dr-ui/src/decoder_seam.rs#L185), [`ui/dr-ui/src/decoder_seam.rs:1`](../../ui/dr-ui/src/decoder_seam.rs#L1), [`ui/dr-ui/src/decoder_seam.rs:216`](../../ui/dr-ui/src/decoder_seam.rs#L216), [`ui/dr-ui/src/decoder_seam.rs:257`](../../ui/dr-ui/src/decoder_seam.rs#L257), [`ui/dr-ui/src/export.rs:1238`](../../ui/dr-ui/src/export.rs#L1238), [`ui/dr-ui/src/export.rs:973`](../../ui/dr-ui/src/export.rs#L973), [`ui/dr-ui/src/import.rs:96`](../../ui/dr-ui/src/import.rs#L96), [`ui/dr-ui/src/library/sweep.rs:322`](../../ui/dr-ui/src/library/sweep.rs#L322), [`ui/dr-ui/src/library/sweep.rs:654`](../../ui/dr-ui/src/library/sweep.rs#L654), [`ui/dr-ui/src/library/thumbnails_gen.rs:109`](../../ui/dr-ui/src/library/thumbnails_gen.rs#L109), [`ui/dr-ui/src/merge.rs:119`](../../ui/dr-ui/src/merge.rs#L119), [`ui/dr-ui/src/repairs.rs:243`](../../ui/dr-ui/src/repairs.rs#L243) |
| FR-RAW-3 | [`core/dr-decode/src/lib.rs:162`](../../core/dr-decode/src/lib.rs#L162), [`core/dr-decode/src/lib.rs:564`](../../core/dr-decode/src/lib.rs#L564), [`core/dr-decode/src/locate.rs:1435`](../../core/dr-decode/src/locate.rs#L1435), [`core/dr-gpu/src/demosaic.rs:1063`](../../core/dr-gpu/src/demosaic.rs#L1063), [`core/dr-gpu/src/demosaic.rs:1409`](../../core/dr-gpu/src/demosaic.rs#L1409), [`core/dr-gpu/src/demosaic.rs:868`](../../core/dr-gpu/src/demosaic.rs#L868), [`core/dr-gpu/tests/hot_pixels.rs:1`](../../core/dr-gpu/tests/hot_pixels.rs#L1) |