HATI

draw a centered crossHATch from the Inside

 

out

Classification:

Custom image primitive

Command Syntax:

HATI <color> <number of horizontal boxes> <number of

 

vertical boxes>

Limits:

<color> = available colors

 

<number of horizontal boxes> = half of number of pixels

 

<number of vertical boxes> = half of number of lines

Query Syntax:

None

Description:

Draws a crosshatch from the Inside-Outof a given color and

 

forms a given number of boxes in each direction. The primitive

 

has center lines that divide the active video exactly in half in

 

each direction. The vertical center line is two (2) pixels thick if

 

the format has an even number of active pixels. The horizontal

 

center line is two (2) pixels thick if the format has an even

 

number of active lines. All other lines are one (1) pixel thick. If

 

you enter an odd number of boxes, a half box is placed at each

 

end of the crosshatch. All lines in a given direction are spaced

 

equally. Any remaining pixels are distributed as equally as

 

possible around the perimeter of the grid. This may cause the

 

first and last lines in each direction not to be at the very edges

 

of video. In turn, this may cause any half boxes to be slightly

 

larger.

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: H A T I

g r e e n 1

5 9

/ / D r a w a g r e e n g r i d

 

/ / w i t h

1 5

h o r i z o n t a l a n d 9

 

/ / v e r t i c a l b o x e s

A L L U

/ /

U p d a t e h a r d w a r e t o c u r r e n t

 

/ /

b u f f e r c o n t e n t s

6-133

Page 259
Image 259
Quantum Data 801GC, 801GF, 801GX manual Hati, Draw a centered crossHATch from the Inside, Out, 133