MB86296 Datasheet, PDF (114/352 Pages) Fujitsu Component Limited. – PCI Graphics Controller Specification

FUJITSU LIMITED PRELIMINARY AND CONFIDENTIAL
10.2.3 Drawing parameters
The MB86290A-compatible interface uses the following parameters for drawing:
The triangles (Right triangle and Left triangle) are distinguished according to the locations of three
vertices as follows (not used for high-speed 2DTriangle):
V0
Long edge
Upper edge
Upper triangle
V1
V2
Lower edge
Lower triangle
Right-hand triangle
Upper edge
Upper triangle
V1
V0
Long edge
Lower edge
Lower triangle ^V2
Left-hand triangle
The following parameters are required for drawing triangles (for high-speed 2DTriangle, X and Y
coordinates of each vertex are specified).
Ys Xs,Zs,Rs,Gs,Bs,Ss,Ts,Qs ^XUs
dXdy
dXUdy
dZdy
dRdy
dZdx,dRdx,dGdx,dBdx,
dGdy
dSdx,dTdx,dQdx
dBdy
dSdy
dTdy
dQdy
XLs
dXLdy
Upper edge start
Y coordinates
USN
Lower edge start
Y coordinates
LSN
Note: Be careful about the positional relationship between coordinates Xs, XUs, and XLs.
For example, in the above diagram, when a right-hand triangle is drawn using the parameter
that shows the coordinates positional relationship Xs (upper edge start Y coordinates) > XUs
or Xs (lower edge start Y coordinates) > XLs, the appropriate picture may not be drawn.
MB86296S<Coral-PA>
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Specification Manual Rev0.1