Add shaders

Sources/Shaders/ChromaticAberrationShader.shader

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+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+Shader "Hidden/ChromaticAberration" {
+	Properties {
+		_MainTex ("Base", 2D) = "" {}
+	}
+	
+	CGINCLUDE
+	
+	#include "UnityCG.cginc"
+	
+	struct v2f {
+		float4 pos : SV_POSITION;
+		float2 uv : TEXCOORD0;
+	};
+	
+	sampler2D _MainTex;
+	
+	float4 _MainTex_TexelSize;
+	half _ChromaticAberration;
+	half _AxialAberration;
+	half _Luminance;
+	half2 _BlurDistance;
+		
+	v2f vert( appdata_img v ) 
+	{
+		v2f o;
+		o.pos = UnityObjectToClipPos(v.vertex);
+		o.uv = v.texcoord.xy;
+		
+		return o;
+	} 
+	
+	half4 fragDs(v2f i) : SV_Target 
+	{
+		half4 c = tex2D (_MainTex, i.uv.xy + _MainTex_TexelSize.xy * 0.5);
+		c += tex2D (_MainTex, i.uv.xy - _MainTex_TexelSize.xy * 0.5);
+		c += tex2D (_MainTex, i.uv.xy + _MainTex_TexelSize.xy * float2(0.5,-0.5));
+		c += tex2D (_MainTex, i.uv.xy - _MainTex_TexelSize.xy * float2(0.5,-0.5));
+		return c/4.0;
+	}
+
+	half4 frag(v2f i) : SV_Target 
+	{
+		half2 coords = i.uv;
+		half2 uv = i.uv;
+		
+		coords = (coords - 0.5) * 2.0;		
+		half coordDot = dot (coords,coords);
+		
+		half2 uvG = uv - _MainTex_TexelSize.xy * _ChromaticAberration * coords * coordDot;
+		half4 color = tex2D (_MainTex, uv);
+		#if SHADER_API_D3D9
+			// Work around Cg's code generation bug for D3D9 pixel shaders :(
+			color.g = color.g * 0.0001 + tex2D (_MainTex, uvG).g;
+		#else
+			color.g = tex2D (_MainTex, uvG).g;
+		#endif
+		
+		return color;
+	}
+
+	// squeezing into SM2.0 with 9 samples:
+	static const int SmallDiscKernelSamples = 9;		
+	static const half2 SmallDiscKernel[SmallDiscKernelSamples] =
+	{
+		half2(-0.926212,-0.40581),
+		half2(-0.695914,0.457137),
+		half2(-0.203345,0.820716),
+		half2(0.96234,-0.194983),
+		half2(0.473434,-0.480026),
+		half2(0.519456,0.767022),
+		half2(0.185461,-0.893124),
+		half2(0.89642,0.412458),
+		half2(-0.32194,-0.932615),
+	};
+
+	half4 fragComplex(v2f i) : SV_Target 
+	{
+		half2 coords = i.uv;
+		half2 uv = i.uv;
+		
+		// corner heuristic
+		coords = (coords - 0.5h) * 2.0h;		
+		half coordDot = dot (coords,coords);
+
+		half4 color = tex2D (_MainTex, uv);
+		half tangentialStrength = _ChromaticAberration * coordDot * coordDot;
+		half maxOfs = clamp(max(_AxialAberration, tangentialStrength), _BlurDistance.x, _BlurDistance.y);
+
+		// we need a blurred sample tap for advanced aberration
+
+		// NOTE: it's relatively important that input is HDR
+		// and if you do have a proper HDR setup, lerping .rb might yield better results than .g
+		// (see below)
+
+		half4 blurredTap = color * 0.1h;
+		for(int l=0; l < SmallDiscKernelSamples; l++)
+		{
+			half2 sampleUV = uv + SmallDiscKernel[l].xy * _MainTex_TexelSize.xy * maxOfs;
+			half3 tap = tex2D(_MainTex, sampleUV).rgb;
+			blurredTap.rgb += tap;
+		}
+		blurredTap.rgb /= (float)SmallDiscKernelSamples + 0.2h;
+
+		// debug:
+		//return blurredTap;
+
+		half lumDiff = Luminance(abs(blurredTap.rgb-color.rgb));
+		half isEdge = saturate(_Luminance * lumDiff);
+		
+		// debug #2:
+		//return isEdge;
+
+		color.rb = lerp(color.rb, blurredTap.rb, isEdge);
+		
+		return color;
+	}
+
+	ENDCG 
+	
+Subshader {
+
+ // 0: box downsample
+ Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment fragDs
+      
+      ENDCG
+  }
+// 1: simple chrom aberration
+Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment frag
+      
+      ENDCG
+  }
+// 2: simulates more chromatic aberration effects
+Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment fragComplex
+      
+      ENDCG
+  }  
+}
+
+Fallback off
+	
+} // shader