The number of characters per row in the font set. If not given charsPerRow will be the image width / characterWidth.
The height of each character in the font set.
The key of the image containing the font.
The amount of vertical space to add to the line height of the font.
If the font set doesn't start at the top left of the given image, specify the X coordinate offset here.
If the font set doesn't start at the top left of the given image, specify the Y coordinate offset here.
If the characters in the font set have horizontal spacing between them set the required amount here.
If the characters in the font set have vertical spacing between them set the required amount here.
The width of each character in the font set.
The characters used in the font set, in display order. You can use the TEXT_SET consts for common font set arrangements.