100 lines
2.5 KiB
Plaintext
100 lines
2.5 KiB
Plaintext
Shader "GlobalSnow/DepthBlur" {
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Properties {
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_MainTex("Buffer (RGBA)", 2D) = "white" {}
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}
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SubShader {
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CGINCLUDE
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#include "UnityCG.cginc"
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struct appdata {
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float4 vertex : POSITION;
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float2 texcoord : TEXCOORD0;
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};
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struct v2fCross {
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float4 pos : SV_POSITION;
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float4 uv: TEXCOORD0;
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float4 uv1: TEXCOORD1;
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float4 uv2: TEXCOORD2;
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float4 uv3: TEXCOORD3;
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float4 uv4: TEXCOORD4;
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};
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sampler2D _MainTex;
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float4 _MainTex_TexelSize;
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v2fCross vertBlurH(appdata v) {
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v2fCross o;
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o.pos = UnityObjectToClipPos(v.vertex);
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#if UNITY_UV_STARTS_AT_TOP
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if (_MainTex_TexelSize.y < 0) {
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// Texture is inverted WRT the main texture
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v.texcoord.y = 1.0 - v.texcoord.y;
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}
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#endif
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o.uv = float4(v.texcoord, 0, 0);
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float4 inc = float4(_MainTex_TexelSize.x * 1.3846153846, 0, 0, 0);
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o.uv1 = float4(v.texcoord - inc, 0, 0);
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o.uv2 = float4(v.texcoord + inc, 0, 0);
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float4 inc2 = float4(_MainTex_TexelSize.x * 3.2307692308, 0, 0, 0);
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o.uv3 = float4(v.texcoord - inc2, 0, 0);
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o.uv4 = float4(v.texcoord + inc2, 0, 0);
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return o;
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}
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v2fCross vertBlurV(appdata v) {
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v2fCross o;
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o.pos = UnityObjectToClipPos(v.vertex);
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#if UNITY_UV_STARTS_AT_TOP
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if (_MainTex_TexelSize.y < 0) {
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// Texture is inverted WRT the main texture
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v.texcoord.y = 1.0 - v.texcoord.y;
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}
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#endif
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o.uv = float4(v.texcoord, 0, 0);
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float4 inc = float4(0, _MainTex_TexelSize.y * 1.3846153846, 0, 0);
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o.uv1 = float4(v.texcoord - inc, 0, 0);
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o.uv2 = float4(v.texcoord + inc, 0, 0);
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float4 inc2 = float4(0, _MainTex_TexelSize.y * 3.2307692308, 0, 0);
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o.uv3 = float4(v.texcoord - inc2, 0, 0);
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o.uv4 = float4(v.texcoord + inc2, 0, 0);
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return o;
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}
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#define DDEPTH(uv) tex2Dlod(_MainTex,uv).r
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float4 fragBlur (v2fCross i): SV_Target {
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if (i.uv.x<=0.01 || i.uv.x>=0.99 || i.uv.y<=0.01 || i.uv.y>=0.99) return float4(1.0, 0.0, 0.0, 0.0);
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float4 pixel0 = tex2Dlod(_MainTex, i.uv);
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float4 pixel = pixel0.r * 0.2270270270
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+ (DDEPTH(i.uv1) + DDEPTH(i.uv2)) * 0.3162162162
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+ (DDEPTH(i.uv3) + DDEPTH(i.uv4)) * 0.0702702703;
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return float4(pixel.r, pixel0.g, 0, 0);
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}
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ENDCG
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Pass { // Blur horizontally
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CGPROGRAM
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#pragma vertex vertBlurH
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#pragma fragment fragBlur
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#pragma target 3.0
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ENDCG
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}
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Pass { // Blur vertically
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CGPROGRAM
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#pragma vertex vertBlurV
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#pragma fragment fragBlur
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#pragma target 3.0
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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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