Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2005-08-24
2008-10-14
Sajous, Wesner (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S586000, C345S643000, C382S300000, C348S538000
Reexamination Certificate
active
07436412
ABSTRACT:
A graphics engine includes a setup unit and a rendering unit. The setup unit computes coefficients A, B, and C used for interpolating an attribute v of a triangle to be rendered for a graphics image. The setup unit then derives compressed coefficients Ã, {tilde over (B)}, and {tilde over (C)} based on the coefficients A, B, and C. The compressed coefficients have a fixed-point format with R integer bits left of a binary point and T fractional bits right of the binary point, where R>1 and T≧0. R is selected based on the number of bits used for attribute v, T is selected based on the screen dimension, and R+T is much less than the number of bits used to represent the coefficients A, B, and C. The rendering unit performs interpolation for the attribute v using the compressed coefficients Ã, {tilde over (B)}, and {tilde over (C)}, and may be implemented with a simple (R+T)-bit non-saturating accumulator.
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Evans Matthew J.
Macek Kyong H.
QUALCOMM Incorporated
Rouse Thomas R.
Sajous Wesner
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