Imaging is native Object Pascal (Delphi and FPC) image loading, saving and manipulation library. It is available for several platforms and does not require any third party dynamic libraries.
http://imaginglib.sourceforge.net
https://bitbucket.org/galfar/lib-imaging/issues
http://galfar.vevb.net/imaging/smf/
https://bitbucket.org/galfar/imaginglib
https://github.com/galfar/imaginglib