Shader "TSF Shaders/UI/OutlineEx"
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{
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Properties
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{
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_MainTex ("Main Texture", 2D) = "white" {}
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_Color ("Tint", Color) = (1, 1, 1, 1)
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//_OutlineColor ("Outline Color", Color) = (1, 1, 1, 1)
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//_OutlineWidth ("Outline Width", Int) = 1
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_StencilComp ("Stencil Comparison", Float) = 8
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_Stencil ("Stencil ID", Float) = 0
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_StencilOp ("Stencil Operation", Float) = 0
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_StencilWriteMask ("Stencil Write Mask", Float) = 255
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_StencilReadMask ("Stencil Read Mask", Float) = 255
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_ColorMask ("Color Mask", Float) = 15
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[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
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}
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SubShader
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{
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Tags
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{
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"Queue"="Transparent"
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"IgnoreProjector"="True"
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"RenderType"="Transparent"
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"PreviewType"="Plane"
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"CanUseSpriteAtlas"="True"
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}
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Stencil
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{
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Ref [_Stencil]
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Comp [_StencilComp]
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Pass [_StencilOp]
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ReadMask [_StencilReadMask]
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WriteMask [_StencilWriteMask]
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}
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Cull Off
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Lighting Off
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ZWrite Off
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ZTest [unity_GUIZTestMode]
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Blend SrcAlpha OneMinusSrcAlpha
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ColorMask [_ColorMask]
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Pass
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{
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Name "OUTLINE"
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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//Add for RectMask2D
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#include "UnityUI.cginc"
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//End for RectMask2D
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sampler2D _MainTex;
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fixed4 _Color;
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fixed4 _TextureSampleAdd;
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float4 _MainTex_TexelSize;
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//float4 _OutlineColor;
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//int _OutlineWidth;
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//Add for RectMask2D
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float4 _ClipRect;
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//End for RectMask2D
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struct appdata
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{
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float4 vertex : POSITION;
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float4 tangent : TANGENT;
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float4 normal : NORMAL;
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float2 texcoord : TEXCOORD0;
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float2 uv1 : TEXCOORD1;
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float2 uv2 : TEXCOORD2;
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float2 uv3 : TEXCOORD3;
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fixed4 color : COLOR;
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};
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struct v2f
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{
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float4 vertex : SV_POSITION;
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float4 tangent : TANGENT;
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float4 normal : NORMAL;
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float2 texcoord : TEXCOORD0;
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float2 uv1 : TEXCOORD1;
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float2 uv2 : TEXCOORD2;
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float2 uv3 : TEXCOORD3;
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//Add for RectMask2D
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float4 worldPosition : TEXCOORD4;
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//End for RectMask2D
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fixed4 color : COLOR;
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};
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v2f vert(appdata IN)
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{
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v2f o;
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//Add for RectMask2D
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o.worldPosition = IN.vertex;
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//End for RectMask2D
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o.vertex = UnityObjectToClipPos(IN.vertex);
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o.tangent = IN.tangent;
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o.texcoord = IN.texcoord;
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o.color = IN.color * _Color;
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o.uv1 = IN.uv1;
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o.uv2 = IN.uv2;
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o.uv3 = IN.uv3;
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o.normal = IN.normal;
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return o;
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}
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/*
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fixed IsInRect(float2 pPos, float4 pClipRect)
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{
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pPos = step(pClipRect.xy, pPos) * step(pPos, pClipRect.zw);
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return pPos.x * pPos.y;
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}
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*/
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fixed IsInRect(float2 pPos, float2 pClipRectMin, float2 pClipRectMax)
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{
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pPos = step(pClipRectMin, pPos) * step(pPos, pClipRectMax);
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return pPos.x * pPos.y;
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}
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fixed SampleAlpha(int pIndex, v2f IN)
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{
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const fixed sinArray[12] = { 0, 0.5, 0.866, 1, 0.866, 0.5, 0, -0.5, -0.866, -1, -0.866, -0.5 };
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const fixed cosArray[12] = { 1, 0.866, 0.5, 0, -0.5, -0.866, -1, -0.866, -0.5, 0, 0.5, 0.866 };
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float2 pos = IN.texcoord + _MainTex_TexelSize.xy * float2(cosArray[pIndex], sinArray[pIndex]) * IN.normal.z*0.2; //normal.z 存放 _OutlineWidth
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return IsInRect(pos, IN.uv1, IN.uv2) * (tex2D(_MainTex, pos) + _TextureSampleAdd).w * IN.tangent.w; //tangent.w 存放 _OutlineColor.w
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}
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fixed4 frag(v2f IN) : SV_Target
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{
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fixed4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
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if (IN.normal.z > 0) //normal.z 存放 _OutlineWidth
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{
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color.w *= IsInRect(IN.texcoord, IN.uv1, IN.uv2); //uv1 uv2 存着原始字的UV长方形区域大小
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half4 val = half4(IN.uv3.x, IN.uv3.y, IN.tangent.z, 0); //uv3.xy tangent.z 分别存放 _OutlineColor 的rgb
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val.w += SampleAlpha(0, IN);
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val.w += SampleAlpha(1, IN);
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val.w += SampleAlpha(2, IN);
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val.w += SampleAlpha(3, IN);
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val.w += SampleAlpha(4, IN);
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val.w += SampleAlpha(5, IN);
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val.w += SampleAlpha(6, IN);
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val.w += SampleAlpha(7, IN);
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val.w += SampleAlpha(8, IN);
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val.w += SampleAlpha(9, IN);
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val.w += SampleAlpha(10, IN);
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val.w += SampleAlpha(11, IN);
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color = (val * (1.0 - color.a)) + (color * color.a);
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color.a *= IN.color.a*IN.color.a*IN.color.a; //字逐渐隐藏，描边也是
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}
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//Add for RectMask2D
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color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);
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#ifdef UNITY_UI_ALPHACLIP
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clip(color.a - 0.001);
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#endif
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//End for RectMask2D
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return color;
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}
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ENDCG
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}
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}
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}
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