Computer graphics processing and selective visual display system – Computer graphic processing system – Integrated circuit
Patent
1997-02-24
1999-06-08
Tung, Kee M.
Computer graphics processing and selective visual display system
Computer graphic processing system
Integrated circuit
345441, G09G 536
Patent
active
059108070
ABSTRACT:
A display control device comprises a work memory including at least a plurality of memory bits each for storing one-bit data indicating whether or not each pixel is inside a figure of plane geometry having a contour such as a polygon, a control unit for scanning each of a plurality of raster scan lines and searching for at least one pixel which can be assumed to form a line segment which partially constructs the contour of the figure so as to generate a control signal for controlling bit inversion to determine the inside of the figure, a selecting unit for receiving the one-bit data of each pixel which is sequentially delivered by the work memory and inverting the one-bit data so as to select one from among the original one-bit data and the inverted one-bit data according to the control signal from the control unit, and output the selected data; a unit for writing the selected data from the selecting unit into a corresponding one of the plural memory bits of the work memory.
REFERENCES:
patent: 4626838 (1986-12-01), Tsujioka et al.
patent: 4646076 (1987-02-01), Wiedenman et al.
patent: 4763119 (1988-08-01), Matsubara et al.
patent: 4914729 (1990-04-01), Omori et al.
Foley, J. D., Van Dam A., Computer Graphics: Principles and Practice, Addison-Wesley, pp. 92-99, 1987.
Kittaka Yoshiaki
Noguchi Tadayuki
Sakai Shuji
Tanaka Kuniaki
Ueda Naoki
Luu Sy D.
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Electric Semiconductor Software Co. Ltd.
Tung Kee M.
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