Impostors: fix depth capture

1 files changed, 52 insertions, 0 deletions

diff --git a/DepthBlit.shader b/DepthBlit.shader
new file mode 100644
index 0000000..04187c2
--- /dev/null
+++ b/DepthBlit.shader
@@ -0,0 +1,52 @@
+Shader "Hidden/yum_food/DepthBlit"
+{
+    // Reads from depth texture and outputs linearized depth to color
+    Properties
+    {
+        _MainTex ("", 2D) = "white" {}
+    }
+
+    SubShader
+    {
+        Cull Off ZWrite Off ZTest Always
+
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #include "UnityCG.cginc"
+
+            sampler2D _DepthTex;
+
+            struct v2f
+            {
+                float4 pos : SV_POSITION;
+                float2 uv : TEXCOORD0;
+            };
+
+            v2f vert(float4 vertex : POSITION, float2 uv : TEXCOORD0)
+            {
+                v2f o;
+                o.pos = UnityObjectToClipPos(vertex);
+                o.uv = uv;
+                return o;
+            }
+
+            float4 frag(v2f i) : SV_Target
+            {
+                float rawDepth = tex2D(_DepthTex, i.uv).r;
+
+                // Orthographic depth is already linear.
+                // We just need to handle the platform-specific Z-buffer direction.
+                #if defined(UNITY_REVERSED_Z)
+                return 1.0 - rawDepth;
+                #else
+                return rawDepth;
+                #endif
+            }
+            ENDCG
+        }
+    }
+}