reading and writing a image stored in a file

[Skaperen]

You first need to extract the image file per its image type.

if by type you mean how the pixels are encoded into an 8-bit (bytes) file, such as GIF, JPEG, or PNG (to name a small subset). i call these "storage formats". i hope to have a wide range of support. i hope there is automatic detection so most files provided by most people will just work. it would be nice for the API to indicate the type so my code can provide the result in the same format.