ijpds formats.book - Kodak

Byte Position Bytes Field Name Description
Chapter 4. Record Formats
Character Definition with Metrics (CDM)
29-n n Bitmap Pattern This field contains the bitmap pattern for the character defined by
this CDM. Each row of the pattern contains an integral number of
16-bit segments. The number of rows is determined by the height
field (bytes 11-12). The number of 16-bit segments per row is
determined by the width field (bytes 9-10). For example, if the
height is 21 and the width is 28, this field must contain 21 rows
consisting of two 16-bit segments each (42 16-bit segments or 84
bytes).
The high-order bit in this field (bit hex 80 in byte position 29)
controls the dot in the top left corner of the character bounding
box. Subsequent bits in the same segment control dots in a left-toright
order in the first row of the character. The first dot in the
second row of the character is controlled by the high-order bit of
the nth 16-bit segment, where n is the number of segments per
row plus one.
Each row must be padded to the right with binary zeroes.
If the character pattern will not fit in a block, a continuation CDM
must be used. An integral number of rows must be used in each
CDM record.
Reference Guide 4 - 17