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Methods and arrangements for allowing independent program modules to access shared display device resources

  • US 6,683,630 B1
  • Filed: 04/28/2000
  • Issued: 01/27/2004
  • Est. Priority Date: 08/06/1999
  • Status: Expired due to Term
First Claim
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1. A method for sharing a physical display device between a plurality of processes, the method comprising:

  • associating a first process with a first virtual display layer, wherein the first virtual display layer is represented by first layer data including first content data defining at least one desired state for at least one controllable element in a display device, the first content data including at least one type of data selected from a group comprising flag data and mask data;

    associating a second process with a second virtual display layer, wherein the second virtual display layer is represented by second layer data including second content data defining at least one further desired state for the at least one controllable element in the display device, the second content data including at least one type of data selected from the group comprising flag data and mask data;

    combining the first and second virtual display layers to produce a composite virtual display layer based on the at least one type of data selected from the group comprising flag data and mask data within the first and second content data; and

    displaying data associated with the composite virtual display layer on the display device.

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