'What is the best way of pixel image processing in Swift?

What is the most common and effective way (maybe framework or lib) to process image pixel by pixel in Swift (e.g. grab rgba channels and process them, blend pixels in some custom way etc.) ?

I found few related frameworks: GPUImage, Toucan, Metal

Are those libs have pixel processing API in Swift ? If yes, what is the most popular one ?

Thanks in advance !



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