Specifies color calculation. Color calculation is effective when the non-texture color is in RGB mode. Specify Replace if you do not want to perform color calculation. When performing Gouraud shading processing, specify the Gouraud shading table address divided by 8H. Gouraud shading is effective when the non-texture color is in RGB mode.
When translucent processing is performed on a polyline, two lines overlap each vertex, resulting in a semi-transparency twice, resulting in an original picture 3/4 + background 1/4.
When shadow processing is performed on a polyline, two lines overlap each vertex, resulting in a shadow of 2 times and a brightness of 1/2.
The upper left coordinate of the rectangle to be drawn is the vertex (A) (CMDXA, CMDYA), the upper right coordinate is the vertex (B) (CMDXB, CMDYB), the lower right coordinate is the vertex (C) (CMDXC, CMDYC), Define the lower left coordinate as vertex (D) (CMDXD, CMDYD). Since the positional relationship between the four vertices is arbitrary, you can draw by specifying rotation and twist by specifying vertex (A), vertex (B), vertex (C), and vertex (D).
Note: If two vertices are set to the same coordinate, the polyline is drawn with a triangle. 4 vertices
If set to the same coordinates, the polyline is drawn with 1 pixel.