CGImageSource Memory Leak
Gus Mueller (tweet):
This sample shows how
CGImageSourceCreateThumbnailAtIndexleaks something akin to the memory behind a CGImageRef when asked to create a thumbnail for a 16bpc TIFF image if one isn’t present.
I wonder whether ImageIO got rewritten in Catalina. I’ve found multiple bugs where basic stuff like setting an image’s metadata doesn’t work reliably (FB7435415).
I’ve confirmed with other devs that 16-Bit imaging is funky on 10.14 and above. The most common issue I’ve seen is 16-Bit images end up with rainbow colors when drawn into a 16-Bit context.
