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Graphics printer (Rainbow 1981-09)
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Home / Publications / Rainbow / Rainbow 1981 / Rainbow 1981-09 - Graphics printer (Rainbow 1981-09)
As part of our continuity efforts to help with printer utilities, here is a screen printer for low-res graphics using the COLOR Computer and the LP VII.
This same logic will work with other printers, too. It is a little complicated with the LP VII because of the dot matrix graphics, a$ opposed to plain graphics characters.
If you want a fatter or thinner single graphics "block," just change the first CHR$(3) in Line 12 to another number. This number controls the number of times the dot-line is repeated. You will also have to change the record CHR$(3) in the same line to the value of the first so that the spaces and "blocks" match.
Here is the short program:
10 FOR X=0 TO 127 11 FOR Y=0 TO 63 12 IF POINT(Y,X) THEN PRINT#-2,CHR$(18)CHR$(28)CHR$(3)CHR$(255);ELSE PRINT#-2,CHR$(18)CHR$(28)CHR$(3)CHR$(128); 13 NEXT Y 14 PRINT#-2,CHR$(18) 15 NEXTX