Window specific control of overlay planes in a graphics display

Details Window specific control of overlay planes in a graphics display Window specific control of overlay planes in a graphics display

1994-10-25

1995-11-21

Nguyen, Phu K.

G06F 1520

Patent

active

054695414

ABSTRACT:
Apparatus and methods for selectively controlling by graphics environment window the characteristics of an overlay common to multiple-windows while operating within the context of a conventional RAMDAC overlay control architecture. Window specific overlay control is accomplished by concatenating the window, masking and overlay data as an address to a mapping memory. The bit content of the mapping memory is controlled directly by the general purpose processor to selectively refine the relationship between the concatenated input as an address and the mapping memory output as the state conveyed to the overlay control of the RAMDAC. A common overlay is thus selectively modifiable by window.

REFERENCES:
patent: 4149184 (1979-04-01), Giddings et al.
patent: 4317114 (1982-02-01), Walker
patent: 4555775 (1985-11-01), Pike
patent: 4653020 (1987-03-01), Cheselka et al.
patent: 4682297 (1987-07-01), Iwami
patent: 4691295 (1987-09-01), Erwin et al.
patent: 4703317 (1987-10-01), Shimomi et al.
patent: 4812834 (1989-03-01), Wells
patent: 4845640 (1989-07-01), Ballard et al.
patent: 4970664 (1990-11-01), Kaiser et al.
patent: 5237653 (1993-08-01), Noguchi et al.
patent: 5263134 (1993-11-01), Paal et al.
"Color-Palette Chips Bundle Extra Features with RAM Look-Up Table and DACs" by M. S. Conner, Electrical Design News, vol. 33, No. 20, Sep. 29, 1988, p. 67.
Graphics Library User's Guide, version 2.0, Document No. 007-1201-020, 1988, pp. 6-13-6-15, Silicon Graphics, Inc.

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