   XOR ink?
  I'm using the DirectX line class to draw lines onto my scene.  Is there a way to get it to draw the lines with XOR ink?  ie: Color of (a,r,g,b) 0,255,0,255 on the render target changes to 255,0,255,0.I know I could probably just use a pixelshader but I'm hoping for something simpler.Thanks,Devin   
  ALPHABLENDENABLE = trueSRCBLEND = ZERODESTBLEND = INVDESTCOLORNot quite xor.  It's 1-oldvalue, which is useless when oldvalue = 0.5, but may be usable depending on what you're doing.   