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HP DeskJet 600, 700, 800, 900 & HP 2000 Series PCL Developer’s Guide 101
point font for a 300-ppi device would have a height 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
similar to the Pitch Extended field (refer to the Pitch field example).
Scalable Font - This field is ignored and should be set to zero.
HP DeskJet 500 Series printers ignore this field. The HP DeskJet 600 and 85X Series
printers do not.
11.2.31 Cap Height (UINT)
Cap height is a percentage of the Em of a font and is used to calculate the distance from the
cap line (top of an unaccented, upper-case letter, e.g., “H”) to the baseline. An Em is a mea-
sure in decipoints of the height of a font; e.g., the em of a 10-point font is 100 decipoints.
Bitmap Font - Fonts containing a 0 in this field are assumed to have a cap height percentage
of 70.87% of em. The Cap Height data is represented as the product of the cap height per-
centage and the maximum unsigned integer:
0.7087 x 65535 = 46445
For nonzero values the Cap Height percentage is calculated as follows:
% = (Cap Height Data /65535) x 100
Scalable Font - Contains the cap height in design window units (as defined in the Scale Fac-
tor field).
11.2.32 Font Number (UINT)
Bitmap Font - Should be ignored and set to 0.
11.2.33 Font Name (ASC16)
This is a 16 byte ASCII character field in which the user may assign a font name.
11.2.34 X Resolution (UINT)
In resolution-specified bitmap fonts, this field specifies the resolution of the font in the X
dimension in dots per inch.
11.2.35 Y Resolution (UINT)
In resolution-specified bitmap fonts, this field specifies the resolution of the font in the Y
dimension in dots per inch.
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