uniform sampler2D inputImage;
uniform float minLevel;
uniform float midLevel;
uniform float maxLevel;
uniform vec4 offset1;
uniform vec4 offset2;
uniform vec4 offset3;
uniform vec4 offset4;
uniform vec4 offset5;
uniform vec4 offset6;
uniform int levelsMode;
precision mediump float;
/*{
	"CREDIT": "by VIDVOX",