Computer graphics processing and selective visual display system – Computer graphics processing – Shape generating
Patent
1997-09-30
1999-04-27
Nguyen, Phu K.
Computer graphics processing and selective visual display system
Computer graphics processing
Shape generating
G06F 1500
Patent
active
058984402
ABSTRACT:
A data processor and a data processing method are capable of effectively carrying out antialiasing on a plurality of lines that are close to each other or cross each other. The apparatus has a memory for storing a bitmap of a line to be displayed on a display, and a data generator for generating, according to antialiasing conditions, data of every pixel to be plotted to form the line. The data includes an address to specify the pixel and one of intensity and color values to be assigned as a new value to the pixel. The apparatus also has a reader for reading, as an old value, one of intensity and color values that corresponds to the new value and has already been assigned to the pixel, out of the memory at the address of the pixel, and a comparator for comparing the new value with the old value, and only when the new value is greater than the old one, providing a write signal. Only when the write signal is provided, the new value is written into the memory at the address of the pixel.
REFERENCES:
patent: 5528738 (1996-06-01), Sfarti et al.
patent: 5581673 (1996-12-01), Kikuchi
patent: 5714986 (1998-02-01), Dao
Kabushiki Kaisha Toshiba
Nguyen Phu K.
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