Dispose of a previously-created font.
void TTF_CloseFont(TTF_Font *font);
the font to dispose of.
Call this when done with a font. This function will free any resources associated with it. It is safe to call this function on NULL, for example on the result of a failed call to TTF_OpenFont().
The font is not valid after being passed to this function. String pointers from functions that return information on this font, such as TTF_FontFaceFamilyName() and TTF_FontFaceStyleName(), are no longer valid after this call, as well.
This function is available since SDL_ttf 2.0.12.