Get rendering info for a specific character.
Note: You should only ever need to use this when you want to implement your own text rendering.
If the character ch
with the specified size
and style
is present in the font texture, then this method will
return true, and info will contain the texture placement information for that character. If the character is not
present, this method returns false. If size
is zero, it will use the default size for the font.