Method and apparatus for a cached video hardware cursor

Details Method and apparatus for a cached video hardware cursor Method and apparatus for a cached video hardware cursor

1998-04-10

2000-05-16

Tung, Kee M.

Computer graphics processing and selective visual display system

Computer graphic processing system

Plural graphics processors

345162, G06T 160

Patent

active

060644052

ABSTRACT:
A method for producing a modified cursor in a video graphics display system is accomplished by receiving data corresponding to the modified cursor and comparing the received data with cached cursor information. If the comparison produces a favorable result, a pointer is stored in a cursor offset register, where the pointer corresponds to a data set in video memory that describes the modified cursor in a video format. When the comparison produces an unfavorable result, a video format data set is generated for the modified cursor and is stored in the video memory. A pointer to the new video format data set is stored in the cursor offset register, and at least a portion of the received data is stored with the cached cursor information.

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patent: 5376949 (1994-12-01), Haigh et al.
patent: 5389947 (1995-02-01), Wood et al.
patent: 5559533 (1996-09-01), Hicok et al.
patent: 5621434 (1997-04-01), Marsh

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