Method and system for flipping images in a window using overlays

Details Method and system for flipping images in a window using overlays Method and system for flipping images in a window using overlays

1996-04-25

1998-12-15

Tung, Kee M.

Computer graphics processing and selective visual display system

Computer graphic processing system

Integrated circuit

345113, 345431, 345435, 345342, 345501, G06F 1300

Patent

active

058502327

ABSTRACT:
A method for flipping an image in a window using overlays involves creating an overlay flipping structure and using this structure to control "flipping" of an overlay image in a display device that supports overlays. A display device interface includes services to create and manipulate an overlay flipping structure including a front buffer and a back buffer. To flip in a window, an application program draws its image to the back buffer of the flipping structure while the overlay control in the display controller reads the overlay image from the front buffer. The overlay control superimposes the overlay in the front buffer with the image in the frame buffer. The display device interface controls the flipping of the overlay by determining when it can change the address of the overlay image used by the display controller without causing flipping.

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patent: 5428722 (1995-06-01), Marsh et al.
patent: 5455599 (1995-10-01), Cabral et al.
patent: 5515494 (1996-05-01), Lentz
patent: 5519825 (1996-05-01), Naughton et al.
Implementing Games for Windows Using the WinG API and the WaveMix DLL, James Finnegan, Microsoft Systems Journal, pp. 61-81, Jan., 1995.
Computer Graphics'88, Proceedings of the conference held in London, Oct. 1988, "one frame ahead: frame buffer management for animation and real-time graphics" K. Auel.

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