Method and apparatus for expanding and centering VGA text and gr

Details Method and apparatus for expanding and centering VGA text and gr Method and apparatus for expanding and centering VGA text and gr

1994-04-29

1996-05-28

Brier, Jeffery

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345131, G09G 526, G09G 536

Patent

active

055216145

ABSTRACT:
A method and apparatus for expanding a video graphics adapter (VGA) text character to fully fill the screen of a flat panel display. The present invention stores binary information representing a horizontal row of character text. A prescribed bit in the binary information may be set to determine whether to duplicate pixels associated with the binary information in either a horizontal or vertical direction. A circuit is provided to ensure that foreground and background characteristics of the graphics character text being expanded are consistent with the sent prescribed bit in the binary information.

REFERENCES:
patent: 3573789 (1971-04-01), Sharp
patent: 4107786 (1978-08-01), Masaki et al.
patent: 4283724 (1981-08-01), Edwards
patent: 4630039 (1986-12-01), Shimada
patent: 4746981 (1988-05-01), Nadan et al.
patent: 5068651 (1991-11-01), Takebe et al.
patent: 5103309 (1992-04-01), Hara
patent: 5293474 (1994-03-01), Patil et al.
patent: 5351064 (1994-09-01), Zenda
Sutty & Blair, Advanced Programmer's Guide to the EGA/VGA (1988), pp. 19-23, 26-27, 44-51.
Ferraro, Programmer's Guide to the EGA and VGA Cards (1993), pp. 278-284.

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