Patent ID: 8035647
Filing Date: 2011-10-11
Classification: G06T

Abstract:
1. A method for communicating data between a raster operations unit (ROP) of a graphics processing device and a frame buffer via a system bus that includes separate upstream and downstream data transfer paths, the method comprising: storing new data for a first plurality of pixels in a first input buffer; storing new data for a second plurality of pixels in a second input buffer; generating a plurality of read requests for transmission to the frame buffer, each read request being associated with one of the input buffers, each read request requesting current data for one or more of the pixels for which new data is stored in the associated one of the input buffers; receiving the current data requested in at least some of the read requests; modifying the current data based on the new data; generating a plurality of write requests for transmission to the frame buffer, each write request being associated with one of the input buffers and including the modified data for one or more of the pixels stored in that one of the input buffers; and forming a sequence of read requests and write requests for transmission to the frame buffer, wherein the sequence is formed such that the read requests associated with the pixels in the second input buffer are interleaved with the write requests associated with pixels in the first input buffer, wherein forming the sequence includes: