Layered rotational graphics driver

Details Layered rotational graphics driver Layered rotational graphics driver

2006-05-23

2006-05-23

Brier, Jeffery A. (Department: 2672)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

Reexamination Certificate

active

07050071

ABSTRACT:
A method and apparatus for a layered rotational graphics driver are described. A rotation driver is loaded. The rotation driver is layered between a graphics device interface and a display driver. The rotation driver allocates a first memory space and the display driver allocates a second memory space. An image is rendered into the first memory space. The image has a first orientation within the first memory space. The image is rotated from the first memory space into the second memory space. The image has a second orientation within the second memory space. The image is displayed in the second orientation from the second memory space.

REFERENCES:
patent: 5973664 (1999-10-01), Badger
patent: 6400851 (2002-06-01), Shih
patent: 2004/0052431 (2004-03-01), Locker et al.
Jim Gettys and Keith Packard, The X Resize and Rotate Extension—RandR, Usenix Technical Conference 2001, pp. 1-9.

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