[How to Write an Effect Plugin (Part 2 of 4 - Intermediate)]

// Code fixed to account for retired 'Utility' library; :wink:

#region UICode
int Amount1=0;   //[-255,255]Cyan - Red
int Amount2=0;   //[-255,255]Magenta - Green
int Amount3=0;   //[-255,255]Yellow - Blue
#endregion

void Render(Surface dst, Surface src, Rectangle rect) 
{ 
   ColorBgra CurrentPixel; 
   int R, G, B;
   for(int y = rect.Top; y < rect.Bottom; y++) 
   { 
       for (int x = rect.Left; x < rect.Right; x++) 
       { 
           CurrentPixel = src[x,y]; 
           R = (int)CurrentPixel.R;
           G = (int)CurrentPixel.G;
           B = (int)CurrentPixel.B;
           // Cyan - Red adjustment
           R = R + Amount1;
           G = G - (Amount1 / 2);
           B = B - (Amount1 / 2);
           // Magenta - Green adjustment
           G = G + Amount2;
           R = R - (Amount2 / 2);
           B = B - (Amount2 / 2);
           // Yellow - Blue adjustment
           B = B + Amount3;
           R = R - (Amount3 / 2);
           G = G - (Amount3 / 2);
           // Reassemble the color from R, G, and B
           CurrentPixel = ColorBgra.FromBgra(Int32Util.ClampToByte(,Int32Util.ClampToByte(G),Int32Util.ClampToByte(R),CurrentPixel.A);
           dst[x,y] = CurrentPixel; 
       } 
   } 
}