1989-12-20
1992-09-15
Evans, Arthur G.
395110, G06K 1500
Patent
active
051485176
ABSTRACT:
A print data generator for modifying bit-mapped image data according to bit-mapped font data includes an image memory for storing image words consisting of L bits each, a font memory for storing font words consisting of L bits each, the number of words in each line of the font being (N-1). A number selecting controller selects a number S representing a bit offset between the image words and the font words, and a width number W which is one greater than the number of font words (N-1) per line. A shift clock generator receives the offset number S and repeatedly generates a series of shift clock pulses of S pulses each. A font shifter receives (N-1) successive font words from the font memory and receives the series of S shift clock pulses and generates shifted font words, the first shifted font word in each line having (L-S) bits at the head of the first font word for the (L-S) bits at the tail of the shifted font word. The last shifted font word in each line has S bits at the tail of the last font word for the S bits at the head of the shifted font word. The shifted font words, other than the first and last shifted font words, each consists of (L-S) bits at the head of one received font word for the tail of the shifted font word.
REFERENCES:
patent: 4653020 (1987-03-01), Cheselka et al.
patent: 4675833 (1987-06-01), Cheek et al.
patent: 4779223 (1988-10-01), Asai et al.
patent: 5047957 (1991-12-01), Ikenoue
Nagata Masato
Suzuki Masahiro
Evans Arthur G.
OKI Electric Industry Co., Ltd.
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