Hardware implementation for providing raster offsets in a...

Details Hardware implementation for providing raster offsets in a... Hardware implementation for providing raster offsets in a...

G - Physics

06

F

375/12, 354/197

G06F 3/153 (2006.01) G09G 5/14 (2006.01)

Patent

CA 1323436

ABSTRACT An apparatus for implementing, in hardware, circuitry for adding a raster offset to screen coordinates in a graphics display subsystem for the purpose of displaying the image in a window which may be moved by a user to an arbitrary position on a screen display. Specifically, a pair of raster offsets, one for X coordinates and one for Y coordinates, are stored in X and Y raster offset registers. The X and Y raster offsets correspond to the offset of an active window from the origin of the screen display. These offsets are added to each coordinate which is to be displayed within the active window in a manner which does not result in any additional overhead.

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