Anti-Aliasing Function - Fujitsu MB86R02 Jade-D Hardware Manual

MB86R02 'Jade-D' Hardware Manual V1.64
Ys
Xs
XUs
XLs
Zs
Rs
Gs
Bs
Ss
Ts
Qs
dXdy
dXUdy
dXLdy
dZdy
dRdy
dGdy
dBdy
dSdy
dTdy
dQdy
USN
LSN
dZdx
dRdx
dGdx
dBdx
dSdx
dTdx
dQdx
18.10.2.4

Anti-aliasing function

MB86R02 'Jade-D' performs anti-aliasing to make jaggies less noticeable and smooth on line edges.
To use this function at the edges of primitives, redraw the primitive edges with anti-alias lines.
(The edge of line is blended with a frame buffer color at that time. Ideally please draw sequentially
from father object.)
Y coordinates start position of long edge in drawing triangle
X coordinates start position of long edge corresponding to Ys
X coordinates start position of upper edge
X coordinates start position of lower edge
Z coordinates start position of long edge corresponding to Ys
R color value of long edge corresponding to Ys
G color value of long edge corresponding to Ys
B color value of long edge corresponding to Ys
S coordinate of textures of long edge corresponding to Ys
T coordinate of textures of long edge corresponding to Ys
Q perspective correction value of texture of long edge corresponding to Ys
X DDA value of long edge direction
X DDA value of upper edge direction
X DDA value of lower edge direction
Z DDA value of long edge direction
R DDA value of long edge direction
G DDA value of long edge direction
B DDA value of long edge direction
S DDA value of long edge direction
T DDA value of long edge direction
Q DDA value of long edge direction
Count of spans of upper triangle
Count of spans of lower triangle
Z DDA value of horizontal direction
R DDA value of horizontal direction
G DDA value of horizontal direction
B DDA value of horizontal direction
S DDA value of horizontal direction
T DDA value of horizontal direction
Q DDA value of horizontal direction
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