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103 lines
2.2 KiB
103 lines
2.2 KiB
Shader "Hidden/EfficientBlur"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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}
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CGINCLUDE
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#include "UnityCG.cginc"
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sampler2D _MainTex;
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half4 _MainTex_TexelSize;
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half4 _MainTex_ST;
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uniform half _Radius;
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struct v2f
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{
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half4 vertex : SV_POSITION;
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half4 texcoord : TEXCOORD0;
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};
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/*struct appdata
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{
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half4 vertex : POSITION;
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half2 texcoord: TEXCOORD0;
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}*/
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v2f vert(appdata_img v)
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{
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v2f o;
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o.vertex = UnityObjectToClipPos(v.vertex);
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half4 offset = half2(-0.5h, 0.5h).xxyy; //-x, -y, x, y
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offset *= _MainTex_TexelSize.xyxy;
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offset *= _Radius;
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o.texcoord = v.texcoord.xyxy + offset;
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return o;
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}
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half4 frag(v2f i) : SV_Target
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{
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// half4 o =
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// tex2D(_MainTex, i.texcoord.xw);
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// o += tex2D(_MainTex, i.texcoord.zw);
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// o += tex2D(_MainTex, i.texcoord.xy);
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// o += tex2D(_MainTex, i.texcoord.zy);
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// o /= 4.0;
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//Pray to the compiler god these will MAD
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half4 o =
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tex2D(_MainTex, i.texcoord.xw) / 4.0h;
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o += tex2D(_MainTex, i.texcoord.zw) / 4.0h;
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o += tex2D(_MainTex, i.texcoord.xy) / 4.0h;
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o += tex2D(_MainTex, i.texcoord.zy) / 4.0h;
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return o;
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}
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ENDCG
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SubShader
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{
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Cull Off ZWrite Off ZTest Always Blend Off
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Pass
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{
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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ENDCG
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}
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Pass
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{
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CGPROGRAM
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//Crop before blur
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#pragma vertex vertCrop
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#pragma fragment frag
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half4 _CropRegion;
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half2 getNewUV(half2 oldUV)
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{
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return lerp(_CropRegion.xy, _CropRegion.zw, oldUV);
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}
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v2f vertCrop(appdata_img v)
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{
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v2f o = vert(v);
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o.texcoord.xy = getNewUV(o.texcoord.xy);
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o.texcoord.zw = getNewUV(o.texcoord.zw);
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return o;
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}
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ENDCG
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}
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}
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FallBack Off
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}
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