Martin Kröning
bfc167fe6d
* Replace libpng submodule with source Taken from 505e70834d35383537b6491e7ae8641f1a4bed1876dbfe361201fc80868d88ca libpng-1.6.37.tar.xz * Remove submodule-related config from CI
This demonstrates the use of PNG_USER_CONFIG and pngusr.h The makefile builds a minimal write-only encoder with embedded libpng and zlib. Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC on the make command line. If you prefer to use the shared libraries, go to contrib/pngminus and build the pnm2png application there.