Community Core Vision

uniform sampler2D	tex;

uniform float direction;

uniform float kernel_size;

uniform float size_cx;

uniform float size_cy;

void main (void) {

    float kernel_size = 2.0;

	float rho = 20.0;

    vec2 direction = vec2(0.0,1.0);

	float dx = 1.0 / size_cx;

	float dy = 1.0 / size_cy;

	vec2  st = gl_TexCoord [0].st;

	vec4	color = vec4 (0.0, 0.0, 0.0, 0.0);

	float	weight = 0.0;

	for (float i = -1.0*kernel_size; i <= kernel_size ; i+=1.0) {

		float fac = exp (-(i * i) / (2.0 * rho * rho));

		weight += fac;

		color += texture2D (tex, st + vec2 (dx*i, dy*i) * direction) * fac;

	}

	gl_FragColor =  color / weight;

}