Assigning the character dot pattern
Wewill use a tiny representationof a telephonesymbolfor our example.
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Compression
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Figure 5-3. Telephone symbol with LQ pica
Afteryouhavedesignedthecharacterpattern,youwillneedto compressthe Dot Pattern.Datacompressionallowsyou to storemore downloadcharac- ters than’withoutcompression.It is a more efficientuse of memory.The printer will repeat the previous dot column when the current column compressionmask bit is set to “l”.
Filluptheadjacentdoteventheydonotprint,thencomparetheeachventcal line to the left line. If the line is the same as the left one, write “l” in the columnof the “compressionmask bit”. If it is different,write“O”.
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