Method for asynchronously maintaining an image on a display devi

Details Method for asynchronously maintaining an image on a display devi Method for asynchronously maintaining an image on a display devi

1994-06-28

1996-10-15

Nguyen, Phu K.

G06F 1500

Patent

active

055662870

ABSTRACT:
A method for asynchronously maintaining an image on a display device comprises the following steps. First, a drawing request is received from the application program. Then a drawing area of the image is determined in response to the received drawing request and an entry representing the drawing area is inserted into a list of entries representing respective drawing areas. A screen update request is then received from the application program. In response to this received screen update request, an entry representing a drawing area is retrieved from the list, and graphic objects are redrawn if any portion of the graphic object lies within the drawing area represented by the retrieved entry.

REFERENCES:
patent: 5297252 (1994-03-01), Becker
patent: 5343238 (1994-08-01), Lappington et al.
patent: 5430870 (1995-07-01), Stanton et al.
patent: 5438661 (1995-08-01), Ogawa
"HP IVI Application Program Interface Design",by Pamela W. Munsch, Warren I. Otsuka and Gary D. Thomsen, published in Hewlett-Packard Journal, Oct. 1990, pp. 21-31.

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