Method for displaying characters and/or figures in a computer gr

Details Method for displaying characters and/or figures in a computer gr Method for displaying characters and/or figures in a computer gr

1989-05-22

1990-10-30

Evans, Arthur G.

Boots, shoes, and leggings

340703, G06F 300

Patent

active

049673769

ABSTRACT:
In a computer graphic system, in which drawing data of pixels of an outline or outlines of a character and/or figure to be displayed are drawn in dots of drawing planes defined in a frame buffer memory, control data for controlling the painting of the character and/or figure in corresponding dots of control planes defined in the frame buffer memory synchronously with drawing of the drawing data in the drawing planes, and the painting is effected by scanning a predetermined area of the drawing planes, in which area the outline or outlines are drawn, by a horizontal scanning line and carrying out the drawing of drawing data in dots of the drawing planes, which exist on the horizontal scanning line, in accordance with the control data, a control data is written in the corresponding dot of the control planes by one of three different kinds of the control data in accordance with the state that the pixel belongs to a left edge of the outline or outlines, a right edge thereof or neither of them, and drawing data are drawn in dots of the drawing planes, which exist between dots corresponding to those dots of the control planes which have the control data indicating the left edge and the right edge.

REFERENCES:
patent: 4156237 (1979-05-01), Okada et al.
patent: 4731742 (1988-03-01), Nishi et al.
"Fundamentals of Interactive Computer Graphics", published by Addison-Weslet Publishing Company.

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