Specify the shading table in the following format with 32 gradations of RGB code.

Uint16 shadingTbl [32]; 0 ← Dark → 31

If double-sided polygon is set to 1, single-sided polygon data is displayed on both sides.

typedef     struct SprSurface {
     Uint16 vertNo [4]; / ​​* Vertex number composing the surface * /
     Uint16 drawMode; / * Drawing mode * /
     Uint16 color; / * Color data * /
} SprSurface;

drawMode b15, b14 = 00: color is a color code
                      01: color is the character number of the texture
                      10: color is the index number of the shading table
                      11: color is the original RGB code 
 for automatic shading
            b13, b12 = 00: The minimum value of the four vertices after coordinate conversion is used as the Z sort target point.
                      01: The maximum value of the four vertices after coordinate conversion is the target point for Z sorting.
                      10: The center value of the four vertices after coordinate conversion is the target point for Z sorting. 

            b11-b0: Same as the sprite drawing mode word.
If you specify a texture with drawMode, the color bits are as follows.
For color b15 and b14, specify the texture inversion mode.
      b15, b14 = 00: No inversion
              = 01: Left / right reverse
              = 10: Upside down
              = 11: Up / down / left / right inversion
      b13-b0: Character number of the rupture