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295 lines
8.6 KiB
295 lines
8.6 KiB
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
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Shader "Hidden/LensAberrations"
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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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SubShader
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{
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ZTest Always Cull Off ZWrite Off
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Fog { Mode off }
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CGINCLUDE
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#pragma fragmentoption ARB_precision_hint_fastest
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#include "UnityCG.cginc"
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#pragma target 3.0
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sampler2D _MainTex;
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float4 _MainTex_TexelSize;
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half4 _ChromaticAberration;
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half4 chromaticAberration(half2 uv)
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{
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half2 coords = 2.0 * uv - 1.0;
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half2 cd = coords * dot(coords, coords);
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half4 color = tex2D(_MainTex, uv);
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half3 fringe = tex2D(_MainTex, uv - cd * _ChromaticAberration.a).rgb;
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color.rgb = lerp(color.rgb, fringe, _ChromaticAberration.rgb);
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return color;
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}
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half4 _DistCenterScale;
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half3 _DistAmount;
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half2 distort(half2 uv)
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{
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uv = (uv - 0.5) * _DistAmount.z + 0.5;
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half2 ruv = _DistCenterScale.zw * (uv - 0.5 - _DistCenterScale.xy);
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half ru = length(ruv);
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#if DISTORT
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half wu = ru * _DistAmount.x;
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ru = tan(wu) * (1.0 / (ru * _DistAmount.y));
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uv = uv + ruv * (ru - 1.0);
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#elif UNDISTORT
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ru = (1.0 / ru) * _DistAmount.x * atan(ru * _DistAmount.y);
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uv = uv + ruv * (ru - 1.0);
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#endif
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return uv;
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}
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half3 _VignetteColor;
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half3 _VignetteSettings;
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half2 _VignetteCenter;
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half _VignetteBlur;
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half _VignetteDesat;
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sampler2D _BlurTex;
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half4 vignette(half4 color, half2 uv)
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{
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#define _Intensity _VignetteSettings.x
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#define _Smoothness _VignetteSettings.y
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#define _Roundness _VignetteSettings.z
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half vfactor = 1.0;
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#if VIGNETTE_CLASSIC
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half2 d = (uv - _VignetteCenter) * _Intensity;
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vfactor = pow(saturate(1.0 - dot(d, d)), _Smoothness);
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#else
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half2 d = abs(uv - _VignetteCenter) * _Intensity;
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d = pow(d, _Roundness);
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#endif
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vfactor = pow(saturate(1.0 - dot(d, d)), _Smoothness);
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#if VIGNETTE_BLUR
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half2 coords = 2.0 * uv - 1.0;
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half3 blur = tex2D(_BlurTex, uv).rgb;
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color.rgb = lerp(color.rgb, blur, saturate(_VignetteBlur * dot(coords, coords)));
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#endif
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#if VIGNETTE_DESAT
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half lum = Luminance(color);
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color.rgb = lerp(lerp(lum.xxx, color.rgb, _VignetteDesat), color.rgb, vfactor);
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#endif
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color.rgb *= lerp(_VignetteColor, (1.0).xxx, vfactor);
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return color;
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}
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ENDCG
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// (0) Blur pre-pass
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_blur_prepass
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#pragma fragment frag_blur_prepass
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#pragma multi_compile __ CHROMATIC_ABERRATION
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#pragma multi_compile __ DISTORT UNDISTORT
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#pragma
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half2 _BlurPass;
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struct v2f
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{
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half4 pos : SV_POSITION;
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half2 uv : TEXCOORD0;
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half4 uv1 : TEXCOORD1;
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half4 uv2 : TEXCOORD2;
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};
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v2f vert_blur_prepass(appdata_img v)
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{
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v2f o;
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o.pos = UnityObjectToClipPos(v.vertex);
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o.uv = v.texcoord.xy;
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#if UNITY_UV_STARTS_AT_TOP
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if (_MainTex_TexelSize.y < 0)
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o.uv.y = 1.0 - o.uv.y;
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#endif
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half2 d1 = 1.3846153846 * _BlurPass;
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half2 d2 = 3.2307692308 * _BlurPass;
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o.uv1 = half4(o.uv + d1, o.uv - d1);
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o.uv2 = half4(o.uv + d2, o.uv - d2);
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return o;
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}
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half4 fetch(half2 uv)
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{
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#if (DISTORT || UNDISTORT)
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uv = distort(uv);
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#endif
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#if CHROMATIC_ABERRATION
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return chromaticAberration(uv);
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#else
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return tex2D(_MainTex, uv);
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#endif
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}
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half4 frag_blur_prepass(v2f i) : SV_Target
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{
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half4 c = fetch(i.uv) * 0.2270270270;
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c += fetch(i.uv1.xy) * 0.3162162162;
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c += fetch(i.uv1.zw) * 0.3162162162;
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c += fetch(i.uv2.xy) * 0.0702702703;
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c += fetch(i.uv2.zw) * 0.0702702703;
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return c;
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}
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ENDCG
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}
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// (1) Chroma
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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half4 frag(v2f_img i) : SV_Target
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{
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return chromaticAberration(i.uv);
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}
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ENDCG
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}
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// (2) Distort
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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#pragma multi_compile DISTORT UNDISTORT
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half4 frag(v2f_img i) : SV_Target
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{
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half2 uv = distort(i.uv);
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return tex2D(_MainTex, uv);
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}
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ENDCG
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}
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// (3) Vignette
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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#pragma multi_compile VIGNETTE_CLASSIC VIGNETTE_FILMIC
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#pragma multi_compile __ VIGNETTE_BLUR
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#pragma multi_compile __ VIGNETTE_DESAT
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half4 frag(v2f_img i) : SV_Target
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{
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half4 color = tex2D(_MainTex, i.uv);
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return vignette(color, i.uv);
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}
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ENDCG
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}
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// (4) Chroma / Distort
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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#pragma multi_compile DISTORT UNDISTORT
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half4 frag(v2f_img i) : SV_Target
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{
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half2 uv = distort(i.uv);
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return chromaticAberration(uv);
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}
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ENDCG
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}
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// (5) Chroma / Vignette
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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#pragma multi_compile VIGNETTE_CLASSIC VIGNETTE_FILMIC
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#pragma multi_compile __ VIGNETTE_BLUR
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#pragma multi_compile __ VIGNETTE_DESAT
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half4 frag(v2f_img i) : SV_Target
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{
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return vignette(chromaticAberration(i.uv), i.uv);
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}
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ENDCG
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}
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// (6) Distort / Vignette
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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#pragma multi_compile DISTORT UNDISTORT
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#pragma multi_compile VIGNETTE_CLASSIC VIGNETTE_FILMIC
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#pragma multi_compile __ VIGNETTE_BLUR
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#pragma multi_compile __ VIGNETTE_DESAT
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half4 frag(v2f_img i) : SV_Target
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{
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half2 uv = distort(i.uv);
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return vignette(tex2D(_MainTex, uv), i.uv);
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}
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ENDCG
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}
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// (6) Chroma / Distort / Vignette
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Pass
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{
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CGPROGRAM
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#pragma vertex vert_img
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#pragma fragment frag
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#pragma multi_compile DISTORT UNDISTORT
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#pragma multi_compile VIGNETTE_CLASSIC VIGNETTE_FILMIC
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#pragma multi_compile __ VIGNETTE_BLUR
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#pragma multi_compile __ VIGNETTE_DESAT
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half4 frag(v2f_img i) : SV_Target
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{
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half2 uv = distort(i.uv);
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half4 chroma = chromaticAberration(uv);
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return vignette(chroma, i.uv);
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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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