Appeal No. 97-2583
Application 08/156,951
coupling each of said separate video display
device drivers to a single virtual video display device
driver;
maintaining a representation of each object
displayed within all of said graphic user interface sessions
within said single virtual video display device driver;
simultaneously coupling each of said separate
video display device drivers to said video display; and
controlling what portion of said video display
screen each of said separate video display device drivers may
paint to [sic] utilizing said single virtual video display
device driver.
15. A data processing system having a video display
including a video display screen for permitting simultaneous
presentation of video data objects within multiple windows
which are each supported by different graphic user interfaces,
said data processing system comprising:
a plurality of video display device drivers,
each of said video display device drivers for painting a
display of objects within an associated graphic user interface
session;
means for coupling each of said separate video
display device drivers to a single virtual video display
device driver;
means for maintaining a representation of each
object displayed within all of said graphic user interface
sessions within said single virtual display device drivers;
means for simultaneously coupling each of said
separate video display device drivers to said video display;
and
means for controlling what portion of said video
display screen each of said separate video display device
drivers may paint to [sic] utilizing said single virtual video
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