This repository is a PHP extension for decoding the PGF image format to either their raw bitmap form or directly re-encoded to PNG for ease of use.
The main goal of this library was to provide a simple way of fetching the thumbnails from a shared digiKam database directly from said database instead of re-generating them.
As of now only these function used for decode are implemented:
pgf_decode_to_rgba(string $pgfData, int $level = 0): stringpgf_decode_to_png(string $pgfData, int $level = 0): string
As this extension was written purely for decoding images, I am not planing to implement the encode functions for now, if someone wants to, PRs are appreciated!
This extension depends on:
Some checks were done to ensure that it wil not crash everything if an invalid use case is detected but please note that while libpgf does use c++ excpetions that are catchable it also contains calls to assert which will crash the php executable if reached.
The library has been successfully tested to decode digiKam thumbnails with:
PHP-8.2-Win32-TSPHP-8.1-Win32-NTSPHP-8.3-Win32-NTS
Linux build has not been tested!