gio:resources-lookup-data (path &optional lookup)

path -- a string with a pathname inside the resource
lookup -- an optional g:resource-lookup-flags value, the default value is :none

The pointer or cffi:null-pointer.

Looks for a file at the specified path in the set of globally registered resources and returns a pointer that lets you directly access the data in memory. The data is always followed by a zero byte, so you can safely use the data as a C string.

For uncompressed resource files this is a pointer directly into the resource bundle, which is typically in some readonly data section in the program binary. For compressed files we allocate memory on the heap and automatically uncompress the data.

The lookup argument controls the behaviour of the lookup.