Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1994-07-01
1996-09-24
Powell, Mark R.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
395162, 395166, 345189, 345190, G06F 1500
Patent
active
055599532
ABSTRACT:
An apparatus and method for storing pixel data in a video memory having a plurality of slices increases the performance of line drawing by ensuring that for a given pixel, neighboring pixels in neighboring scan lines are stored in separate slices of video memory. One embodiment of the invention includes the step of appending a number of offset bits to the end of each scan line, where the number of offset bits is less than the total number of bits contained in the plurality of slices. Another embodiment of the invention rearranges the pixels of every other scan line. Another embodiment adds an offset number of pixels which is equal to the number of pixels per slice times the number of slices, then alternates ordered pixels with rearranged pixels throughout successive scan lines. Performance is further increased by providing a plurality of memory controllers corresponding to the plurality of slices of memory which may operate asynchronously to interleave memory access commands. Therefore, during line draw operations successive pixels which reside in different slices of memory may be accessed in one command, and subsequent accesses may be interleaved to further increase the performance of line drawing operations.
REFERENCES:
patent: 5349372 (1994-09-01), Sellers
patent: 5398316 (1995-03-01), Guttag
patent: 5404448 (1995-04-01), Bowen
IBM Microelectronics catalog, RGB561, Workstation Graphics, Preliminary Rev. 1.0, Mar. 23, 1994, pp. i-66.
Gianos Christopher C.
McCormack Joel J.
McNamara Robert S.
Seiler Larry D.
Chauhan U.
Digital Equipment Corporation
Fisher Arthur W.
Maloney Denis G.
McGuinness Lindsay G.
LandOfFree
Method for increasing the performance of lines drawn into a fram does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for increasing the performance of lines drawn into a fram, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for increasing the performance of lines drawn into a fram will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1947249