LibPoppler's Output Devices' ProfileData tracks total, min, max, & count for all the numbers fed to it. It has refcounted void-pointers for its colour profiles. I expected to see more here!
It has multiple GfxICCBasedColurSpace objects stored in those pointers & a parallel-array cache. These track:
There's other GfxColorSpace (which as mentioned this one references) subclasses, all of which tracks an integral overprint-mask & an int-pointer mapping.
The implementation largely consists of accessors, parsing, & apply the transformations. The central code for applying those transforms is proving to locate even with grep, I guess its provided by embedders? But I should still be finding it in that case?
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