libspng0 binary package in Ubuntu Oracular riscv64

 libspng is a C library for reading and writing Portable Network Graphics
 (PNG) format files with a focus on security and ease of use.
 .
 The simple API allows decoding a PNG file in just a few function calls,
 and no raw pointers or callback functions are involved.
 .
 Following good security practises, code is written according to the rules
 of the CERT C Coding Standard. All integer arithmetic is checked for
 overflow and all error conditions are handled gracefully. The library
 is also continuously fuzzed, scanned by static analyzers and features
 over 1000 test cases.

Source package