Area filling device

Details Area filling device Area filling device

1989-06-30

1991-05-14

Harkcom, Gary V.

Boots, shoes, and leggings

364519, G06F 1562

Patent

active

050161890

ABSTRACT:
An area filling device includes an edge table memory for storing an edge table having data related to the edges, and an address table memory for storing edge table address data for every Y coordinate value. An operation circuit calculates data related to edges consisting of a closed loop figure. An active-edge table circuit forms first, second and third active-edge tables for every Y coordinate value from the data related to the edges stored in the edge table storing memory. The first and second active-edge tables indicate bit data having predetermined bits at X coordinate positions where there are an edge which is not a horizontal edge, and endpoints of a horizontal edge, respectively. The third active-edge table indicates bit data having a predetermined bit at an X coordinate position where there is an endpoint of an edge. A logic circuit inverts the predetermined bits defined in the first and second active-edge tables. An OR gate calculates an OR operation on the bit data from the logic circuit and the bit data related to the third active-edge table and supplied from the active-edge table circuit. The operation results serve as print data.

REFERENCES:
patent: 4763119 (1988-08-01), Matsubara et al.
patent: 4829295 (1989-05-01), Hiroyuki
patent: 4897805 (1990-01-01), Wang
patent: 4962468 (1990-10-01), Beauregard et al.

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