We have to create a SDL_font for each size we use. Each SDL_font have a file handle. With 3 font and 100 different sizes, we have a lot of handle for nothing. And in some OS we can exceed the limit of file handle.

Unfortunely, SDL_ttf do not provide solution that works and avoids our problem.

So, the solution have thought is to create a in memory file and make SDL Font link to it.