Fonts - BDF format
Bitmap Distribution Format (BDF) for the $ character
Notes:
The format header describes the font and foundry names and a number of properties that apply to all characters in this font, such as the default spacing between them.
Of more interest to us is how they describe each character. The ENCODING gives the index, in decimal, of the character within the character set. 36 is the value of the dollar character in the standard ASCII set. The BBX field is the bounding box of the character. So this character is 3 characters wide, by seven tall. The next two numbers are the offset of this character. There is no horizontal offset, but the character should be drawn one pixel below the baseline. This allows the S of the dollar to sit on the baseline with the vertical stroke dipping slightly below it.
The bitmap then consists of seven hex values. Only the first three bits of each hex value will ever be used since the width is three. The drawing of the character shows the pixels corresponding to each line of the array.