Use this function to load a set of Game Controller mappings from a seekable SDL data stream (memory or file), filtered by the current SDL_GetPlatform(). A community sourced database of controllers is available here (on GitHub).
int SDL_GameControllerAddMappingsFromRW(SDL_RWops* rw, int freerw)
the data stream for the mappings to be added
non-zero to close the stream after being read
Returns the number of mappings added or -1 on error; call SDL_GetError() for more information.
SDL_GameControllerAddMappingsFromRW(SDL_RWFromFile("gamecontrollerdb.txt", "rb"), 1);
You can call this function several times if needed to load different database files.
If a new mapping is loaded for an already known controller GUID, the later version will overwrite the one currently loaded.
Mappings not belonging to the current platform or with no platform field specified will be ignored (i.e. mappings for Linux will be ignored in Windows, etc).
This function will load the text database entirely in memory before processing it, so take this into consideration if you are in a memory constrained environment.
This function is available since SDL 2.0.2.