init

Assets/Shaders/Blur.shader

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+Shader "Geri/Blur"
+{
+    Properties
+    {
+        _Radius("Radius", Range(0, 4)) = 1
+        [HideInInspector] _MainTex ("Sprite Texture", 2D) = "white" {}
+    }
+
+    Category
+    {
+        Tags
+        {
+            "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Opaque"
+        }
+
+        SubShader
+        {
+            GrabPass
+            {
+                Tags
+                {
+                    "LightMode" = "Always"
+                }
+            }
+
+            Pass
+            {
+                Tags
+                {
+                    "LightMode" = "Always"
+                }
+
+                CGPROGRAM
+                #pragma vertex vert
+                #pragma fragment frag
+                #pragma fragmentoption ARB_precision_hint_fastest
+                #include "Blur.cginc"
+
+                sampler2D _GrabTexture;
+                float4 _GrabTexture_TexelSize;
+                float _Radius;
+                int _Enabled;
+
+                half4 first_pass(v2f i) {
+                    half4 sum = half4(0, 0, 0, 0);
+
+                    sum += GRABXYPIXEL(0.0, 0.0);
+                    int measurments = 1;
+
+                    for (float range = 1.f; range <= _Radius * 2; range += 1.f)
+                    {
+                        sum += GRABXYPIXEL(range, range);
+                        sum += GRABXYPIXEL(-range, range);
+                        sum += GRABXYPIXEL(range, 0);
+                        sum += GRABXYPIXEL(0, range);
+                        measurments += 4;
+                    }
+
+                    half4 color = sum / measurments;
+                    i.color.a *= _Radius / 4.0;
+                    color = i.color * i.color.a + color * (1 - i.color.a);
+
+                    return color;
+                }
+
+                half4 frag(v2f i) : COLOR
+                {
+                    return first_pass(i);
+                }
+                ENDCG
+            }
+        }
+    }
+}