How to invert an image in c without external libraries...? Is it possible?

[sri_213]

How to invert an image in c without external libraries...? Is it possible?

[pritaeas]

Learn from this:

https://www.geeksforgeeks.org/c-program-to-invert-making-negative-an-image-content-in-pgm-format/

[rproffitt]

The standard libraries in c and c++ are external and you can't do much without them so the answer must be no.
And that's without getting into we need to either write or use libraries to unpack compressed images. Maybe you could do something with a non-compressed bitmap but I can't guess why a programmer would put such an artificial limitation on their app.

With that out of the way, years ago I used the Image Magick libraries to get what I needed done at the time.