Printronix S828 Programmer's Manual page 168

Programmer Manual
If byte 10A equals X'A0', the current logical page X and Y coordinates determine the origin. When the
block is within a page, GAP bytes 4 through 7 specify the offset from the X-coordinate and Y-coordinate
origin specified in a previously received LPP command (or from the printer default coordinates if no LPP
command was received). When the block is within an overlay that is invoked using an LCC command,
GAP bytes 4 through 7 specify the offset from the Xm-coordinate and Ym-coordinate origin. When the block
is within an overlay that is invoked using an IO command, GAP bytes 4 through 7 specify the offset from
the X-coordinate and Y-coordinate origin specified in the IO command.
When you use the X,Y coordinate system or the I,B coordinate system with the inline orientation equal to 0
degrees, you must use the 0 degree orientation for graphics.
When you use the I,B reference system and the inline orientation is 180 degrees, you must use the 180
degree orientation for graphics.
Graphic Output Control (GOC)
GAP GOC
Length ID
The Graphic Output Control structured field is the second structured field in the DATA portion of the Write
Graphics Control command. This field specifies the size of the graphic block area and a mapping option
for placing the graphic window into the graphic block area. This field is optional and does not need to be in
the Write Graphics Control command. If the GOC field is not present, the printer uses:
● The mapping option X'30' (where offset equals zero)
● X offset and Y offset equals zero
● Graphics block size equals the graphics medium presentation space window size defined in the GDD
self-defining field.
The format of the GOC field is:
Decimal Hex
0-1 0-1
2-3 2-3
4 4
5-6 5-6
7-8 7-8
9-10 9-A
11 B
12-13 C-D
14-15 E-F
Chapter 5 IPDS Programming Information
GDD
DATA
Value Description
0010 - (n + 1) Length of this Structured Field
A66B Structured Field ID
00 Unit Base (10 in.)
01 Unit Base (10 cm)
05A0 - 7FFF Units per Unit Base (10 in.) (See Note 1)
1626 - 7FFF Units per Unit Base (10 cm) (See Note 1)
1 - 7FFF Width of Graphic Block Area in Units
FFFF Use Value From LPD Command
1 - 7FFF Height of Graphic Block Area in Units
FFFF Use Value From LPD Command
Area Mapping Control Option (See Note 2)
10 Scale-to-Fit
20 Center-and-Trim
30 Position-and-Trim
8000 - 7FFF X Offset in Units (See Note 3)
8000 - 7FFF Y Offset in Units (See Note 3)
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