ijpds formats.book - Kodak

Chapter 4. Record Formats
Character Definition with Metrics (CDM)
Byte Position Bytes Field Name Description
9-10 2 Width An unsigned binary number that specifies the width, in dots, of the
character bounding box. For example, hex 00 10 specifies a width
of 16 dots. The practical range is limited by the page buffer size
and font memory limitations. Each character in a font can have a
different width. A width of zero defines a blank character.
The width is the X dimension of the bounding box and the direction
is determined by the orientation of the font.
11-12 2 Height An unsigned binary number that specifies the height, in dots, of the
character bounding box. For example, hex 00 14 represents a
height of 20 dots. The practical range is limited by the page buffer
size and font memory limitations. Each character in a font can
have a different height. A height of zero defines a blank character.
The height is the Y dimension of the bounding box and the
direction is determined by the orientation of the font.
13-16 4 X Offset A signed binary number that specifies the X offset of the character.
The X offset is the number of dots to the left side of the character
bounding box from the current cursor position. Direction of the X
offset is determined by the orientation of the font.
Negative values are represented using the two's complement form.
For example, hex 00 00 00 03 specifies +3 dots and hex FF FF FF
FD specifies -3 dots.
17-20 4 Y Offset A signed binary number that specifies the Y offset of the character.
The Y offset is the number of dots to the top of the character
bounding box from the current cursor position. Direction of the Y
offset is determined by the orientation of the font.
Negative values are represented using the two's complement form.
For example, hex 00 00 00 04 specifies +4 dots and hex FF FF FF
FC specifies -4 dots.
21-24 4 X Escapement A signed binary number that specifies the direction and distance to
the cursor position for the next character from the X position of the
current character. Direction of the X escapement is determined by
the orientation of the font.
Negative values are represented using the two's complement form.
For example, hex 00 00 00 16 specifies +22 dots and hex FF FF
FF EA specifies -22 dots.
25-28 4 Y Escapement A signed binary number that specifies the direction and distance to
the cursor position for the next character from the Y position of the
current character. Direction of the Y escapement is determined by
the orientation of the font.
Negative values are represented using the two's complement form.
For example, hex 00 00 00 1B specifies +27 dots and hex FF FF
FF E5 specifies -27 dots.
4 - 16 IJPDS Formats