Draw processing method and apparatus

Details Draw processing method and apparatus Draw processing method and apparatus

1986-04-07

1989-07-18

Harkcom, Gary V.

Boots, shoes, and leggings

364521, 340747, G06F 3153

Patent

active

048499072

ABSTRACT:
In a draw processing apparatus for drawing a character, pattern or image; a segment element of a horizontal or vertical continuous run length, a coordinate of a start point of the segment and a direction coefficient of the segment are calculated, a boundary coordinate of a draw area in which a data is to be drawn is calculated in accordance with a position and a size of the draw area, a valid portion and an invalid portion of the segment are calculated for each segment element for the result first calculation result in accordance with the second calculation result, and the valid segment portion is drawn in accordance with the first calculation result.

REFERENCES:
patent: 3639736 (1972-02-01), Sutherland
patent: 4146925 (1979-03-01), Green et al.
patent: 4209832 (1980-06-01), Gilham et al.
patent: 4291380 (1981-09-01), Rohner
patent: 4412296 (1983-10-01), Taylor
patent: 4586036 (1986-04-01), Thomason et al.
"Algorithm for Computer Control of a Digital Plotter", Bresenham, J. E., IBM System Journal, vol. 4, No. 1, pp. 25-30, 1965.

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