The structure of the Vertical Rotation Segment is:

Byte

15 (MSB)

8

7

(LSB) 0

Byte

0

VR (22098)

 

 

 

1

2

Data Segment Size (4) *

 

3

4

 

 

 

 

5

6

Format (0)

 

 

 

7

8

Descender value

 

 

9

*This segment is for Font Format 16. The Data Segment Size field for Font Format 16 fonts is 4 bytes; the segment for Font Format 15 fonts is identical except the Data Segment Size field is 2 bytes instead.

Format (UINT16)—Set this value to 0.

Descender Value (SINT16)—Set this value to equal the “sTypoDescender” value from the “OS/2” table of the TrueType font.

2-46 Printer-Specific Differences