// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Santa/Diffuse" {
	Properties {
		_Color ("Tint", COLOR) = (1,1,1,1)
		_Light ("Light", Range (0.01,3)) = 1
		_Contrast ("Contrast", Range (-5.0,5.0)) = 0.5
        _MainTex ("Base (RGB)", 2D) = "white" {}
        _Lightmap ("Lightmap x2 (RGB)", 2D) = "white" {}
    }

SubShader { Tags { "Queue" = "Transparent" }
Pass {  //Blend SrcAlpha OneMinusSrcAlpha
        //Fog { Mode Off }
        CGPROGRAM
		
        #pragma vertex vert
        #pragma fragment frag
		#pragma multi_compile_fog
		#include "UnityCG.cginc"
		uniform float4 _Color;
		uniform float _Light;
		uniform float _Contrast;
		uniform sampler2D _MainTex;
		uniform sampler2D _Lightmap;
		

		
        // vertex input: position, color
        struct appdata 
        {
            float4 vertex : POSITION;
            fixed4 color : COLOR;
            float4 uv0 : TEXCOORD0;
            float4 uv1 : TEXCOORD1;
        };

        struct v2f 
        {
            float4 pos : SV_POSITION;
            fixed4 color : COLOR;
            float4 uv0 : TEXCOORD0;
            float4 uv1 : TEXCOORD1;
			UNITY_FOG_COORDS(n)
        };
        
        v2f vert (appdata v) 
        {
            v2f o;
            o.pos = UnityObjectToClipPos( v.vertex );
            o.color = v.color;
            o.uv0 = v.uv0;
            o.uv1 = v.uv1;
			UNITY_TRANSFER_FOG(o, o.pos);
			
            return o;
        }
        
        fixed4 frag (v2f i) : SV_Target 
        {
			fixed4 c = tex2D(_MainTex, i.uv0) * tex2D(_Lightmap, i.uv1) * _Light * i.color * _Color;
			_Contrast += 1;
			c = c - _Contrast * (c - 1.0f) * c *(c - 0.5f);
			
			UNITY_APPLY_FOG(i.fogCoord, c);
			return c;
        }
        ENDCG
    }
}
}