HP 5961-0509 Height Extended UB, Cap Height UI, Scalable Font Set Pitch Extended field to zero

Scalable Font - Set Pitch Extended field to zero.

Height Extended (UB)

Bitmap Font - This is an addition to the Height field which extends the height an extra eight bits. The value of this field is in font design units. For example, a 10 point font designed at 300 dpi would have a Height field of 166 (41.5 dots, or 9.96 points) and a Height Extended field of 170 (0.1660 dots additional, which adds to 9.9998 points).

This field is calculated similar to the Pitch Extended field. Refer to the Pitch description, above.

Scalable Font - Set The Height Extended field to zero.

Cap Height (UI)

Cap Height is a percentage of the Em of the font and is used to calculate the distance from the capline (top of an unaccented, uppercase letter, such as an “H”) to the baseline.

Bitmap Font - Fonts containing a 0 in this field are assumed to have a cap height percentage of 70.87% of Em (Em being a measure, in points, of the height of the body of the font.

The Cap Height data is represented as the product of the cap height percentage and the maximum unsigned integer:

0.7087 × 65535 = 46,445

For non-zero values, the Cap Height % is calculated as follows:

Scalable Font - Contains the cap height in design units.

EN Font Header Format 11-31