uniform sampler2D texture;
uniform vec4 shadow;
uniform vec2 resolution;
uniform float samples;

#pragma optimize (off)

void main()
{
    //calculating offset
    vec2 xoff = vec2(samples/resolution.x,0.0);
    vec2 yoff = vec2(0.0,samples/resolution.y);
    vec4 color = texture2D(texture, gl_TexCoord[0].xy);

    //need invert y axis
    //gl_TexCoord[0].y = 1.0-gl_TexCoord[0].y;
    vec4 pixel = texture2D(texture, gl_TexCoord[0].xy)*4.0 +
 	         texture2D(texture, gl_TexCoord[0].xy + xoff.x)*2.0 +
 	         texture2D(texture, gl_TexCoord[0].xy - xoff.x)*2.0 +
	         texture2D(texture, gl_TexCoord[0].xy + xoff.x - yoff.y)*1.0+
	         texture2D(texture, gl_TexCoord[0].xy + yoff.y)*2.0+
	         texture2D(texture, gl_TexCoord[0].xy - yoff.y)*2.0+
	         texture2D(texture, gl_TexCoord[0].xy + yoff.y -xoff.x)*1.0+
	         texture2D(texture, gl_TexCoord[0].xy + xoff.x + yoff.y)*1.0+
	         texture2D(texture, gl_TexCoord[0].xy - xoff.x - yoff.y)*1.0;
    pixel.w=pixel.w/16.0;


    gl_FragColor = vec4(shadow.xyz,pixel.w);
}