Modes Of Operation; Normal Mode; Graphics Mode; Extended Graphics Mode - Printronix L7032 Programmer's Reference Manual

Chapter 1

Modes Of Operation

• Dark print, used to produce darker looking graphic elements (e.g., bar
codes, shading masks, reverse print, etc.) is a function of line matrix
printers only. The darker looking print is produced by overstriking.
Thermal and laser printers ignore dark print commands.
Modes Of Operation

Normal Mode

VGL has two basic modes of operation: Normal and Graphics. In Normal
Mode, all characters and commands are passed directly through VGL to the
Line Printer Plus
Special Function Control Code (SFCC) and Graphics Mode command.
All the standard Line Printer Plus Emulation features (such as EVFU,
elongated characters, compressed print, plot mode, etc.) are still available
when VGL is in Normal Mode. However, when VGL receives a Graphics
Mode command, the VGL changes to the Graphics Mode and assumes
control of the printer.

Graphics Mode

In Graphics Mode, all VGL functions are available. The standard graphics
commands provide features such as underline print, horizontal and vertical
duplication, dynamic forms, graphics plotting, and vertical formatting. A
complete listing of all standard graphics commands is provided in the
"Commands" chapter.

Extended Graphics Mode

In addition to the standard graphics commands, the VGL Graphics Mode has
an extended graphics command set, providing more specific graphic features
for forms and labels. Alphanumeric commands, boxes, lines, logos, shading,
special fonts, and all bar codes are part of the extended graphics command
set. Again, complete extended graphics command information is provided in
the "Commands" chapter .
VGL also supports the QMS Version II commands (ILOGO, IPEXP, IISO,
IBARC, IREPH, IREPV, IFONT,S, IHEX, IPLOT, IFORM,C, IFORM,D,
IFORM,E, IFORM,L, and IFORM,R) as well as the original commands
performing the same or similar functions to those in Version II. For example,
the Horizontal Duplication command (S) is still available, while an enhanced
Horizontal Duplication command (IREPH,) is now available with Version II.
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Emulation without processing, except to check for the VGL