Patent
1994-08-29
1995-12-12
Bayerl, Raymond J.
395152, 395157, 395164, G06F 314, G06F 1562
Patent
active
054758122
ABSTRACT:
A method and system for independent control of multiple windows in a graphics display system. Intensity data for a first plurality of pixels is specified for an underlying image within a first window. A first window identifier is associated with each of the first plurality of pixels. Next, intensity data for a second plurality of pixels is specified for an overlying image within a second window. A second window identifier is associated with each of the second plurality of pixels. The intensity data and window identifiers for the overlying and underlying images are then stored in separate locations within a frame buffer. Finally, an overall image is displayed, wherein the overall image contains the underlying image and the overlying image superimposed over at least a portion of the underlying image. The intensity data and the window identifiers are utilized to display the overall image. The window identifiers provide for independent control of the first and second windows so that the first plurality of pixels can be updated while the overall image is displayed.
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Corona James
Henderson Randal L.
Laib Gregory D.
Ba Huynh
Bayerl Raymond J.
Dillon Andrew J.
International Business Machines - Corporation
Walker Mark S.
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