1. A method for generating pixels for a display device, the method comprising: receiving graphics data; rendering a first plurality of samples for a frame in response to said graphics data; filtering said first plurality of samples using a first filter to generate a first set of output pixels for said frame; computing a first negativity value based on said first set of output pixels, wherein said first negativity value measures an amount of negativity in said frame; and adjusting said first filter in response to said first negativity value.