Laser Printer Applications Manual

GRAPHICS

TheStarLaserPrinter8offerstwokindsofgraphics.Itprin~srastergraphics

(sometimescalled “bit-mappedgraphics”),which specify each dot in a

graphicspattern. And it prints pattern graphics,which prints Iincs and

pattcmcdblocks.

Bc aware,though,that addinggraphicelementsalwaysslowsup printing

withlaserprinters.

Starting raster graphics

Youfollowthesefourstepswhenyouuserastergraphics,intheordershown:

Definewhatresolutionyouneed.

2) Issuethe commandto startgraphics.

3) Sendthecommandsto transferrastergraphics.

Sendthecommandto endgraphics.

‘Youmustdefinethe resolutionof yourrastergraphicsbeforeyouusethe

StartRasterGraphicscommand.To definetheresolutionyouneedin your

graphics,sendthiscommand:

<ESC>*t n R

For the valueof n you can entereither75, 100,150or 300.That number

defineshowmanydotspcrinchyouwantinyourfinalgraphicimage.The

defaultresolutionis75dotspcrinch.Aftergraphicshavestarted,theprinter

willignoreany resolutioncommanduntilit receivesthecommandto end

graphics.

Rastergraphicsstartprintingeitherattheleftpageedgeor thecurrentprim

position.To startrastergraphicsyousendthiscommand:

<ESC>Wn A

Youcanput in eitherO(zero)or 1(one)forthe n value.If youenterO,the

marginforgraphicswillbcsetattheleftmostpnntablcedgeofthepage(not

the same as the left margin for text). But if you enter 1, the margin for

graphicswill be set at the columnof the currentprint position,and your

imagewill appearonlyto the rightof thatgraphicsmargin.

A programminghint:moveyourprintpositionin dotincrementswhenever

you’redealingwith graphics.It’s easierthan tryingto calculatecolumn-

widthsor dccipoints.