Genicom GEK 00031B User Manual
Page 168
Chapter 7. Dec LG/Compaq LG Plus Emulation
GEK-00029B
168
SIXEL Sixel Graphics: This sequence provides a group of 6 bit bytes to
be used as vertical graphics data. A bit value of 1 means print a pixel,
while a bit value of 0 means leave a blank. The Device Control String
(DCS) envelope contains the graphics introducer and all graphics data.
This envelope is initiated using the DCS control character and is
terminated with the String Terminator (ST) control character. The Sixel
protocol components are made up of the String Introducer, Protocol
Selector, Picture Data, and String Terminator. The Protocol Selector
consists of a string of 0, 1 or more numeric parameters separated by
the semicolon character (3BH).
The overall command format is the following:
DCS Ps1;Ps2;Ps3 … Psn q Sixel data ST
The Protocol Selector is that portion of the form:
Ps1;Ps2;Pn3 … Pn q.
Hex:
90 Ps1 3B Ps2 3B Pn3 … Pn q
Ps1 selects the horizontal grid size and aspect ratio, this will
implicitly define the vertical grid size. The following table defines the
parameter selections.
Ps1
Horizontal
DPI
Vertical
DPI
Aspect
Ratio
0
100
50
200:100
1
100
50
200:100
2
200
50
400:100
3
200
65
300:100
4
100
40
250:100
5
100
50
200:100
6
67
45
150:100
7
67
55
120:100
8
50
45
110:100
9
50
50
100:100
Ps2 is the background select parameter. It is not used by this printer.
Ps3 selects the horizontal grid size in decipoints. This parameter,
used with the aspect ratio, defines grid size. The following table
identifies the horizontal grid size used for each parameter value.
Ps3
Horizontal
DPI
0
No Change
1
240
2
240
3
240
4
180
5
140
6
120
7
120
8
90
9
90
10
70
11-19
60