lsh4/Assets/SoftKitty/InventoryEngine/Shader/Additive.shader

Shader "UI/Additive"
{
	Properties
	{
		[PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
	     _OverlayTex("Overlay Texture", 2D) = "white" {}
	     _offsetX("Offset X", Float) = 0
		_offsetY("Offset Y", Float) = 0
		_Scale("Overlay Scale", Float) = 1
		_Contrast("Contrast", Float) = 1
		_Brightness("Brightness", Float) = 1
	    _Color("Tint", Color) = (1,1,1,1)
		_StencilComp("Stencil Comparison", Float) = 8
		_Stencil("Stencil ID", Float) = 0
		_StencilOp("Stencil Operation", Float) = 0
		_StencilWriteMask("Stencil Write Mask", Float) = 255
		_StencilReadMask("Stencil Read Mask", Float) = 255

		_ColorMask("Color Mask", Float) = 15
		[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip("Use Alpha Clip", Float) = 0
	}

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

		Stencil
	{
		Ref[_Stencil]
		Comp[_StencilComp]
		Pass[_StencilOp]
		ReadMask[_StencilReadMask]
		WriteMask[_StencilWriteMask]
	}

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

		Pass
	{
		Name "Default"
		CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma target 3.0


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

#pragma multi_compile __ UNITY_UI_ALPHACLIP

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

	struct v2f
	{
		float4 vertex   : SV_POSITION;
		fixed4 color : COLOR;
		float2 texcoord  : TEXCOORD0;
		float4 worldPosition : TEXCOORD1;

	};

	fixed4 _Color;
	fixed4 _TextureSampleAdd;
	float4 _ClipRect;

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

		OUT.texcoord = IN.texcoord;

		OUT.color = IN.color * _Color;

		return OUT;
	}

	sampler2D _MainTex;
	sampler2D _OverlayTex;
	float _Contrast;
	float _Brightness;
	float _offsetX;
	float _offsetY;
	float _Scale;

	fixed4 frag(v2f IN) : SV_Target
	{
		half4 _texColor = tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd;
		
		IN.texcoord.x += _offsetX;
		IN.texcoord.y += _offsetY;
		half4 _overlayColor = tex2D(_OverlayTex, IN.texcoord*_Scale) + _TextureSampleAdd;
		half4 color = pow(_texColor * 1.1, _Contrast) * _Contrast * IN.color * 2.0* _overlayColor.r*_Brightness;
		color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
#ifdef UNITY_UI_ALPHACLIP
		clip(color.a - 0.001);
#endif
		return color;
	}
		ENDCG
	}
	}
}