Unity Ugui Image置灰Shader,支援Mask裁剪
阿新 • • 發佈:2018-12-18
/ Shader "UI/ImageGreyShader" { Properties { [PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {} _Color("Tint", Color) = (1,1,1,1) //MASK SUPPORT ADD _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 //MASK SUPPORT END } SubShader { Tags { "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Transparent" "PreviewType" = "Plane" "CanUseSpriteAtlas" = "True" } //MASK SUPPORT ADD Stencil { Ref [_Stencil] Comp [_StencilComp] Pass [_StencilOp] ReadMask [_StencilReadMask] WriteMask [_StencilWriteMask] } ColorMask [_ColorMask] //MASK SUPPORT END // 源rgba*源a + 背景rgba*(1-源A值) Blend SrcAlpha OneMinusSrcAlpha Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" struct appdata_t { float4 vertex : POSITION; float4 color : COLOR; float2 texcoord : TEXCOORD0; }; struct v2f { float4 vertex : SV_POSITION; fixed4 color : COLOR; half2 texcoord : TEXCOORD0; }; sampler2D _MainTex; fixed4 _Color; v2f vert(appdata_t IN) { v2f OUT; OUT.vertex = UnityObjectToClipPos(IN.vertex); OUT.texcoord = IN.texcoord; #ifdef UNITY_HALF_TEXEL_OFFSET OUT.vertex.xy -= (_ScreenParams.zw - 1.0); #endif OUT.color = IN.color * _Color; return OUT; } fixed4 frag(v2f IN) : SV_Target { half4 color = tex2D(_MainTex, IN.texcoord) * IN.color; float grey = dot(color.rgb, fixed3(0.22, 0.707, 0.071)); return half4(grey,grey,grey,color.a); } ENDCG } } }