Miscellany

sampler s0 : register(s0);
float4 p0 : register(c0);

#define width (p0[0])
#define height (p0[1])

#define PI acos(-1)

float4 main(float2 tex : TEXCOORD0) : COLOR
{
	float dx = 1/width;
	float dy = 1/height;
	float4 c0 = tex2D(s0, tex);
        c0 = (c0-float4(16/255,16/255,16/255,16/255))*float4(255/219,255/219,255/219,255/219);
	return c0;
}