Method and apparatus for rotating an image on a display

Details Method and apparatus for rotating an image on a display Method and apparatus for rotating an image on a display

2006-09-26

2006-09-26

Nguyen, Phu K. (Department: 2673)

Computer graphics processing and selective visual display system

Computer graphics processing

Graphic manipulation

C345S582000, C345S587000

Reexamination Certificate

active

07113194

ABSTRACT:
A method and apparatus utilizes a three dimensional rendering engine to rotate an image based on user selected or otherwise determined screen orientation. A vertex coordinate transformation is defined for a rotated destination image. The source image is used as a texture for texture mapping during rendering operation to produce rotated image. In one embodiment, a separate set of software instructions is used for each orientation mode. Accordingly, a non-pixel by pixel based 3D rotation may be carried out using a 3D rendering engine to avoid a single parameter based seriatim pixel by pixel based orientation.

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