Graphics display system with arbitrary overlapping viewports

Details Graphics display system with arbitrary overlapping viewports Graphics display system with arbitrary overlapping viewports

1985-08-01

1989-03-14

Caldwell, Sr., John W.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340723, 340798, 340734, G09G 100

Patent

active

048128341

ABSTRACT:
In this graphics display system with arbitrary overlapping viewports, a display graphics image is assembled by acquiring from a source of image graphics data line portions of said image defined by a set of sequential control word sequences contained in a control table. Advantageously, each control word sequence includes at least one first control word defining a line portion of single viewport, and a continuation field. At least some of the control word sequences also include at least one continuation control word which defines a line portion of another independent but overlapping viewport. To produce the display, the system includes means responsive to the control words for acquiring graphics data specified therein and providing the same for use in the displayable image. If the continuation field indicates the presence in the sequence of a continuation control word, the system acquires graphics data specified by the continuation control word and utilizes the same in the displayable image thereby producing a display with overlapping viewports.

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patent: 4533910 (1985-08-01), Sukonick et al.
patent: 4542376 (1985-09-01), Bass et al.
patent: 4618858 (1986-10-01), Belch

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