Quantum Data 801GC - Manual (Page 294)

6-168 Chapter 6: Programming Model 801GC, 801GF & 801GX¥Rev. A
TEXT draw TEXT string
Classification: Custom image primitive
Command Syntax: Text <“text “>
Limits: = available colors
= position of left edge of page in pixels
= position of top edge of page in pixels
= available fonts
= approx. 30 characters (must be enclosed by quotes)
Query Syntax: None
Description: Draws a user-defined text string. It uses five (5) parameters.
The first is color. The next two are the X and Y coordinates for
the upper left corner of the starting position of the string. The
fourth parameter selects the font. (Recall that only #0 Sys 16
and #1 OPIX 9 are full alphanumeric sets.) The last parameter
is the text string. If the string is longer than one word, it must
be contained inside quotation marks.
Other Required Cmds: The FMTU command instructs the generator to use the new
setting. The ALLU command updates hardware to the new setting
and redraws the test image.
Example: T E X T r e d 5 0 4 0 o p i x 9 " H E L L O W O R L D "
/ / D r a w r e d " H E L L O W O R L D " a t x = 5 0
/ / y = 4 0 i n o p i x 9 f o n t
TOBL set levels relative TO BLanking
Classification: Custom image primitive
Command Syntax: None
Query Syntax: None
Description: Temporarily changes how the signal levels are determined for
a given color intensity level. The default method uses black as
the 0% reference level and peak video as the 100% level. Inserting
TOBL moves the 0% reference point to the blanking (blacker
than black) pedestal level. The reference point remains shifted
only for as long as the image is displayed.
Other Required Cmds: None
Example: T O B L