// µü´úÒ»´Î
fixed4 blur(sampler2D tex, float2 texSize, fixed2 uv, float spread = 1)
{
	fixed2 step = 1 / texSize; 
	const fixed weight = 0.1111111;
	fixed4 color = fixed4(0, 0, 0, 0);
	color += tex2D(tex, uv + spread * fixed2(-step.x, step.y)) * weight;
	color += tex2D(tex, uv + spread * fixed2(0, step.y)) * weight;
	color += tex2D(tex, uv + spread * fixed2(step.x, step.y)) * weight;
	color += tex2D(tex, uv + spread * fixed2(-step.x, 0)) * weight;
	color += tex2D(tex, uv) * weight;
	color += tex2D(tex, uv + spread * fixed2(step.x, 0)) * weight;
	color += tex2D(tex, uv + spread * fixed2(-step.x, -step.y)) * weight;
	color += tex2D(tex, uv + spread * fixed2(0, -step.y)) * weight;
	color += tex2D(tex, uv + spread * fixed2(step.x, -step.y)) * weight;
	return color;
}