Drawing Parameters - Fujitsu MB86R02 Jade-D Hardware Manual

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MB86R02 'Jade-D' Hardware Manual V1.64

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):

Lower triangle

Right-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

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.

Upper triangle

dZdx,dRdx,dGdx,dBdx,

dSdx,dTdx,dQdx

Lower triangle

Left-hand triangle

Upper edge start

Y coordinates

Lower edge start

Y coordinates