Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1997-05-09
1999-03-23
Nguyen, Phu K.
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
G06F 1500
Patent
active
058867082
ABSTRACT:
In order to realize a high-speed bit-built processing for superimposing pixel data of an image on to a video-memory, only substantial pixel data having color values different from a designated transparent color of a line of the image are stored in a line buffer (109) together with offset values of .chi.-addresses in the line of the substantial pixel data stored in a offset buffer (110). A memory controller (111) reads out the substantial pixel data from the line buffer in order, and writes them in a video memory (112) at a line according to writing addresses calculated by a writing address generator (106) referring to the offset values stored in the offset buffer corresponding to the substantial pixel data.
REFERENCES:
patent: 5634040 (1997-05-01), Her et al.
patent: 5638501 (1997-06-01), Gough et al.
NEC Corporation
Nguyen Phu K.
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