阶段性完成

Assets/OtherPlugins/Le Tai's Asset/TranslucentImage/Resources/Shaders/FillCrop.shader

@@ -0,0 +1,60 @@
+// Copyright (c) Le Loc Tai <leloctai.com> . All rights reserved. Do not redistribute.
+
+Shader "Hidden/FillCrop"
+{
+	Properties
+	{
+		_MainTex ("Texture", 2D) = "white" {}
+	}
+
+	SubShader
+	{
+		// No culling or depth
+		Cull Off ZWrite Off ZTest Always
+
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+
+            #include "interop_birp.cginc"
+            #include "common.hlsl"
+
+            struct VertexInput
+            {
+                float4 vertex : POSITION;
+                float2 uv : TEXCOORD0;
+                UNITY_VERTEX_INPUT_INSTANCE_ID
+            };
+
+            struct VertexOutput
+            {
+                float2 uv : TEXCOORD0;
+                float4 vertex : SV_POSITION;
+                UNITY_VERTEX_OUTPUT_STEREO
+            };
+
+            VertexOutput vert(VertexInput v)
+            {
+                VertexOutput o;
+                UNITY_SETUP_INSTANCE_ID(v);
+                UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                o.uv = v.uv;
+                return o;
+            }
+
+            UNITY_DECLARE_SCREENSPACE_TEXTURE(_MainTex);
+            float4 _CropRegion;
+
+            half4 frag(VertexOutput i) : SV_Target
+            {
+                UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(i)
+                float2 uv = CropUV(i.uv, _CropRegion);
+                return all(uv == saturate(uv)) ? SAMPLE_SCREEN_TEX(_MainTex, uv) : half4(0, 0, 0, 1);
+            }
+            ENDCG
+        }
+    }
+}