float uni1;
half4 uni4;

sampler2D tex1;

float3 SampleDiffuse(float2 uv)
{
	uni4.xy = uv; // modify uniform!
	return tex2D (tex1, uni4.xy);
}

fixed4 main (float4 uv:TEXCOORD0) : COLOR0 {
	fixed4 c = 0.0;
	c.x += uni4.x;
	c.rgb += SampleDiffuse(uv.xy);
	c.z += uni1;
	uni1 += 2.0;
	c.w += uni1;
	return c;
}