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METHOD OF AND APPARATUS FOR CONTROLLING FRAME BUFFER OPERATIONS

  • US 20140354664A1
  • Filed: 06/03/2013
  • Published: 12/04/2014
  • Est. Priority Date: 06/03/2013
  • Status: Active Grant
First Claim
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1. A method of operating a data processing system that comprises a host processor and a graphics processor that in response to commands and data received from the host processor, renders frames to be output and writes those frames to a frame buffer, the method comprising:

  • when a new frame is to be generated and written to the frame buffer;

    determining, for a set of plural sub-regions that the frame has been divided into, which of those sub-regions could have changed from the frame previously-used for the frame buffer;

    generating information indicating for the set of plural sub-regions that the frame has been divided into, which of those sub-regions should be rendered to generate the new frame on the basis of the determination; and

    providing to the graphics processor information indicating, for the set of plural sub-regions that the frame has been divided into, which of those sub-regions should be rendered to generate the frame; and

    the graphics processor using the provided sub-region information to determine those sub-regions in the frame that it should render, rendering those sub-regions, and writing the so-rendered sub-regions to the frame buffer.

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