Shader "Custom/Contrast And Brightness" {
            Properties {
                    _MainTex ("Base (RGB)", 2D) = "white" {}
            }
            SubShader {
                    Pass {
                            CGPROGRAM

                            #pragma vertex vMain
                            #pragma fragment fMain

                            uniform sampler2D _MainTex;
                            uniform float _Contrast;
                            uniform float _Brightness;

                            struct INPUT
                            {
                                    float4 position : POSITION;
                                    float2 coord : TEXCOORD0;
                            };

                            struct OUTPUT
                            {
                                    float4 position : SV_POSITION;
                                    float2 coord : TEXCOORD0;
                            };

                            OUTPUT vMain( INPUT input )
                            {
                                    OUTPUT output;
                                    output.position = mul( UNITY_MATRIX_MVP, input.position );
                                    output.coord = input.coord;
                                    return output;
                            }

                            float4 fMain( OUTPUT input ) : COLOR
                            {
									// tu hardkodujemy jako consty zeby dzialalo z SetReplacementShader()
                                    const float contrast = 1.3;
									const float brightness = 0.1;

									float4 col = tex2D( _MainTex, input.coord );
									col.xyz = ( ( col.xyz - 0.5.xxx ) * contrast.xxx ) + 0.5.xxx;
									col.xyz += brightness.xxx;
                                    return col;
                            }

                            ENDCG
                    }
            }
            FallBack "Diffuse"
    }