Vampyre Imaging Library is up to date and actual. Supports Free Pascal and Delphi, I personally have successfully built and used it @ Raspberry Pi 2
It's just its home page that smells so, stuck in 2009 with a grossly outdated download link (ptruint = cardilnal, the horror).
For up to date, see the author's forum: https://galfar.vevb.net/imaging/smf/index.php
You can ask him question and he will answer https://galfar.vevb.net/imaging/smf/...n.html#msg2001
The library is priceless in its huge scope of supported formats, both image file formats and pixel formats, and its built-in Lanczos resampler.
Must have if you work with GLES2 which requires you convert image into required internal format yourself.
The source code is MPL1 + LGPL, will be migrated to MPL2 (which has built-in clause about double-licensing under GPL) - which is *priceles* since I'm moving onto grayer stuff of modding where I can't take unmodded LGPL with me.
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