Shader "UI/ObjMask"
{
	Properties
	{
		[PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
		_Color("Tint", Color) = (1,1,1,1)
		_ColorMask("Color Mask", Float) = 0

		_StencilID("Stencil ID", Float) = 0
		[HideInInspector]_Stencil("", Float) = 1
		[HideInInspector]_StencilComp ("Stencil Comparison", Float) = 8
		[HideInInspector]_StencilOp ("Stencil Operation", Float) = 0
		[HideInInspector]_StencilWriteMask ("Stencil Write Mask", Float) = 255
		[HideInInspector]_StencilReadMask ("Stencil Read Mask", Float) = 255

		[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip("Use Alpha Clip", Float) = 0
	}

		SubShader
	{
		Tags
	{
		"Queue" = "Transparent"
		"IgnoreProjector" = "True"
		"RenderType" = "Transparent"
		"PreviewType" = "Plane"
		"CanUseSpriteAtlas" = "True"
	}

		//UI Mask 
		Stencil
	{
		Ref [_StencilID]
		Comp Always
		Pass Replace
	}

		Cull Off
		Lighting Off
		ZWrite Off
		ZTest[unity_GUIZTestMode]
		Blend SrcAlpha OneMinusSrcAlpha
		ColorMask[_ColorMask]

		Pass
	{
		Name "Default"
		CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 2.0

#include "UnityCG.cginc"
#include "UnityUI.cginc"

#pragma multi_compile __ UNITY_UI_ALPHACLIP

		struct appdata_t
	{
		float4 vertex   : POSITION;
		float4 color    : COLOR;
		float2 texcoord : TEXCOORD0;
	};

	struct v2f
	{
		float4 vertex   : SV_POSITION;
		fixed4 color : COLOR;
		half2 texcoord  : TEXCOORD0;
		float4 worldPosition : TEXCOORD1;
	};

	fixed4 _Color;
	fixed4 _TextureSampleAdd;
	float4 _ClipRect;

	v2f vert(appdata_t IN)
	{
		v2f OUT;
		OUT.worldPosition = IN.vertex;
		OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);

		OUT.texcoord = IN.texcoord;

#ifdef UNITY_HALF_TEXEL_OFFSET
		OUT.vertex.xy += (_ScreenParams.zw - 1.0) * float2(-1,1) * OUT.vertex.w;
#endif

		OUT.color = IN.color * _Color;
		return OUT;
	}

	sampler2D _MainTex;

	fixed4 frag(v2f IN) : SV_Target
	{
		half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;

		color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);

#ifdef UNITY_UI_ALPHACLIP
		clip(color.a - 0.001);
#endif

		return color;
	}
		ENDCG
	}
	}
}