366 Appendix A Command Reference
GRIH
draw a GRIll pattern of Horizontal lines
Class Custom image primitive
Description Draws equally spaced horizontal lines that form a grill over the entire active video area.
The primitive uses three parameters. The first is the color of the lines, the second is the
thickness of the lines, and the third is the thickness of the space between the lines.
Command syntax GRIH color line_width space_width
color
available colors
line_width
number of pixels in line
space_width
number of pixels in space
Other required
commands
The FMTU command instructs the generator to use the new settings. The ALLU command
updates the hardware to the new settings and redraws the test image.
Example
GRIH green 4 6 // Draw green grid with 4-pixel lines and 6-pixel spaces
ALLU // Update hardware to current buffer contents
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