MB86293 Datasheet, PDF (78/285 Pages) Fujitsu Component Limited. – Grraphiics Conttrrollllerr Speciiffiicattiions

FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
8.2.3 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
Lower edge
V2
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
dZdy
dRdy
dGdy
dBdy
dSdy
dTdy
dQdy
dXUdy
dZdx ,dRdx,dGdx,dBdx,
dSdx,dTdx,dQdx
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.
MB86293 CORAL_LQ
Graphics Controller
78
Specifications Rev. 1.1