NSView Core Image content filters fail on Big Sur

Originator:jamesw
Number:rdar://FB8880855 Date Originated:Oct 11 2020
Status:open Resolved:
Product:AppKit Product Version:macOS Big Sur
Classification:bug Reproducible:yes
 
When using the contentFilters property of an NSView, a custom Core Image filter fails to do anything on Big Sur.  The same thing did work on Catalina.  The filter works on Big Sur if instead you apply it to a CIImage built from a CGImageRef.  Apple's built-in Core Image filters do work in contentFilters on Big Sur.  It doesn't matter whether the custom filter is written using Metal or Core Image Kernel Language.

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