Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1995-11-16
1998-02-24
Bayerl, Raymond J.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
395143, 395503, 395511, 345189, G06F 1300
Patent
active
057218854
ABSTRACT:
A controller in a line drawing circuit uses a Bresenham error term to detect a horizontal line segment in a straight line which is requested to be drawn. At this time, a signal NOPEL representing the number of pixels of the horizontal line segment and a data transfer request signal TRRQ are sent from the line drawing circuit to a data transfer control unit. The data transfer control unit uses a memory control circuit to perform block transfer of a plurality of data corresponding to the number of pixels constituting the horizontal line segment. Therefore, pixel data constituting the horizontal line can be transferred as a block, and the line drawing performance can be improved.
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Abrash, M., "The Good, the Bad, and the Run-Sliced. (Bresenham's Run-Length Slice Algorithm)", Dr. Dobb's Journal, v17, n11, p. 171(6), Nov. 1992.
Angel, E. et al., "Short Note: Speeding Up Bresenham's Algorithm", IEEE Computer Graphics & Applications, v11, n6, pp. 16-17, Nov. 1991.
Gill, G., "N-Step Incremental Straight-Line Algorithms", IEEE Computer Graphics & Applications, v14, n3, pp. 66-72, May 1994.
Bayerl Raymond J.
Chauhan U.
Kabushiki Kaisha Toshiba
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