uniform sampler2D inTex;
uniform vec2 texSz;

void main (void )
{
	vec2 texCoord = gl_FragCoord.xy / texSz;

	vec4 color = texture2D( inTex, texCoord );
	color += texture2D( inTex, texCoord + vec2( 1.0/texSz.x, 0 ) );
	color += texture2D( inTex, texCoord - vec2( 1.0/texSz.x, 0 ) );
	color += texture2D( inTex, texCoord + vec2( 0, 1.0/texSz.y ) );
	color += texture2D( inTex, texCoord - vec2( 0, 1.0/texSz.y ) );
	color += texture2D( inTex, texCoord + vec2( 1.0/texSz.x, 1.0/texSz.y ) );
	color += texture2D( inTex, texCoord - vec2( 1.0/texSz.x, 1.0/texSz.y ) );
	color += texture2D( inTex, texCoord + vec2( -1.0/texSz.x, 1.0/texSz.y ) );
	color += texture2D( inTex, texCoord + vec2( 1.0/texSz.x, -1.0/texSz.y ) );

	gl_FragColor = color / 9.0;
}