varying vec2 uv;
uniform sampler2D texture;

void main() {
	vec3 sample = texture2D(texture,uv).rgb;
	gl_FragColor.rgb = ((sample - vec3(0.5)) * 2.0 + gl_Color.rgb) * gl_Color.a;
	//gl_FragColor.rgb = (sample * 2.0 * gl_Color.rgb) * gl_Color.a;
	gl_FragColor.a = 0.0;
}