Quantum Data 801GC, 801GF, 801GX manual Characters White 88 Ø

The primitive uses three (3) parameters. The first is the color. The second parameter is the code number of the character. For most alpha-numeric fonts, the character number will be the same as the decimal ASCII code number of the character. The last pa- rameter is the number of the font library.

The current firmware includes ten font sets. The fonts are described in the table on the previous page. Font sets #Ø and #1 have a full set of ASCII upper and lower case letters plus numbers and punctuation marks. Font #Ø is used for the GUI editor screens. The remaining font sets only have one or two char- acters each. These are used bu the focus checking test images.

The following example draws white upper case let- ter “X” characters from font set #0:

Characters White 88 Ø

The Limits primitive places nine (9) markers that define the active video area. An “L” shaped marker is positioned at each corner. “T” shaped markers are centered along each edge of video and a small cross is placed at the center of video. The primitive uses a single parameter, the color used for all of the markers. The following example draws white mark- ers:

Limits White

The Centermark primitive draws a small cross in the center of active video. The vertical line is 2 pix- els thick if the format has an even number of active pixels. The horizontal line is 2 pixels thick if the format has an even number of active lines. The primi- tive uses a single parameter, the color of the cross. The following example draws a red marker:

Centermark Red

The Triangle primitive draws a triangle defined by its three endpoints. The primitive uses eight (8) pa- rameters. The first is the color. The next three pairs of parameters are the X and Y coordinates for the three endpoints. The last parameter is the fill flag. More complex filled polygons can be built up using

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