register_font_file_type

Register a new font loading function.

Description

void register_font_file_type(const char *ext, FONT *(*load)(const char *filename, RGB *pal, void *param));
Informs the load_font() functions of a new file type, providing a routine to read fonts in this format. The function you supply must follow the following prototype: 
      FONT *load_my_font(const char *filename, RGB *pal, void *param)
      {
	 ...
      }
The pal parameter can optionally be used to return a palette for the FONT. The parameter param can be anything you like: you can use this to pass information to your loading routine, such as for instance the font height, the character range to load or the index number of a font in a datafile. If you choose to write your own font loading code, your function should be prepared to deal with a value of NULL for either of these parameters.
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