An object is to obtain a three-dimensional graphics system capable of color display with reduced operation time. A color data transform portion (2A) extracts the upper k (k<n) bits from n bits for each of R, G and B in RGB original color data (C1) in geometrically-processed three-dimensional data (D1)...http://www.google.com.tw/patents/US6801214?utm_source=gb-gplus-share專利 US6801214 - Three-dimensional graphics system reducing color data/bits in drawing operations for faster processing
