Graphic pattern processing apparatus

Details Graphic pattern processing apparatus Graphic pattern processing apparatus

1991-07-29

1994-04-05

Brier, Jeffery

Computer graphics processing and selective visual display system

Display peripheral interface input device

345151, G09G 502

Patent

active

053009479

ABSTRACT:
A graphic data processing apparatus for accessing memory which stores pixels where each of the pixels is a picture element of a unique point in two-dimensional space and having a number of pixels which may be selected in the memory and for generating graphic data with two or more bits per pixel being used and a plurality of pixels of data being stored in one word of the memory is disclosed. A physical address operation unit stores information of a current drawing point including a memory address of a word in the memory and a pixel address defining a position of a pixel in one word specified by the memory address. A data operation unit modifies a particular pixel in the one word specified by the pixel address in accordance with a drawing instruction with a number of pixels within a word being selectable.

REFERENCES:
patent: 4509043 (1985-04-01), Mossaides
patent: 4622546 (1986-11-01), Starti et al.
patent: 4668947 (1987-05-01), Clarke, Jr. et al.
"Logic Design for a Graphics Subsystem", Hewlett-Packard Journal, Diserens et al., Sep. 1983, pp. 15-18.

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