LI-COR LI-6400 - Graphics Hardware

LPL Topics
Graphics
Using the LI-6400 23-57
Graphics Hardware
Note that the graphics display and the text display are conceptually different,
and may in fact be physically different as well, depending upon the platform.
On the LI-6400, the graphics and text displays use the same LCD display, but
this device has two separate modes of operation; text and graphics can be
shown separately, or together. In the Macintosh implementation of LPL, the
text and graphics come out in two separate windows.
The keywords GRAPH and ALPHA turn on/off the graphics and text dis-
plays. GETALPHA and GETGRAPH return the state of each display: on
(visible) or off (not visible). On platforms where text and graphics share com-
mon hardware, the ÒinteractionÓ between text and graphics images is set by
GTMODE and sensed by GTMDGET, and can be any of the following: or,
exclusive or, and and.
Note that on the display of the LI-6400, there is ÒinterferenceÓ between text
highlights (inverse and blinking) and graphics mode: text modes will not be
shown when graphics mode is also on.
GRMOVE Graphics pen relative move (user units)
GSCALE Scale graphics area (user units)
GSCGET Gets current scaling (user units)
GSCROLL Enable/Disable auto scrolling
GSHIFT Shift a rectangular region (user units)
GTMDGET Gets graphics-text interaction mode
GTMODE Sets graphics-text interaction mode
GWHERE Gets current pen location (user units)
GWIDTH Width of current graphics window
GWIGET Get current graphics window (Display Pixels)
GWINDOW Define graphics window (Display Pixels)
Table 23-24. Graphics Keyword Summary
Keyword Description