Dev/decal (#336)

* Add decal feature (URP only) (#335)

* fixed errors on 2020.3

---------

Co-authored-by: Miyakawa Takeshi <[email protected]>

Author: H3idi-X

com.unity.toonshader/Runtime/Integrated/Shaders/UnityToon.shader

@@ -1217,6 +1217,7 @@ Shader "Toon" {
             #pragma multi_compile _ _ADDITIONAL_LIGHT_SHADOWS
             #pragma multi_compile _ _SHADOWS_SOFT
             #pragma multi_compile _ _FORWARD_PLUS
+            #pragma multi_compile_fragment _ _DBUFFER_MRT1 _DBUFFER_MRT2 _DBUFFER_MRT3
 
             #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE
             // -------------------------------------

com.unity.toonshader/Runtime/Integrated/Shaders/UnityToonTessellation.shader

@@ -1278,7 +1278,8 @@ Shader "Toon(Tessellation)" {
             #pragma multi_compile _ _ADDITIONAL_LIGHT_SHADOWS
             #pragma multi_compile _ _SHADOWS_SOFT
             #pragma multi_compile _ _FORWARD_PLUS
-            
+            #pragma multi_compile_fragment _ _DBUFFER_MRT1 _DBUFFER_MRT2 _DBUFFER_MRT3
+
             #pragma multi_compile _ _MIXED_LIGHTING_SUBTRACTIVE
             // -------------------------------------
             // Unity defined keywords

com.unity.toonshader/Runtime/UniversalRP/Shaders/UniversalToonBody.hlsl

@@ -126,7 +126,30 @@
 #endif
                 return EnvironmentBRDF(brdfData, indirectDiffuse, indirectSpecular, fresnelTerm);     
             }
-
+#if UNITY_VERSION >= 202120
+            void ApplyDecalToSurfaceDataUTS(float4 positionCS, inout float3 albedo, inout SurfaceData surfaceData, inout float3 normalWS)
+            {
+                #ifdef _SPECULAR_SETUP
+                    half metallic = 0;
+                    ApplyDecal(positionCS,
+                        albedo,
+                        surfaceData.specular,
+                        normalWS,
+                        metallic,
+                        surfaceData.occlusion,
+                        surfaceData.smoothness);
+                #else
+                    half3 specular = 0;
+                    ApplyDecal(positionCS,
+                        albedo,
+                        specular,
+                        normalWS,
+                        surfaceData.metallic,
+                        surfaceData.occlusion,
+                        surfaceData.smoothness);
+                #endif
+            }
+#endif
             struct VertexInput {
                 float4 vertex : POSITION;
                 float3 normal : NORMAL;

com.unity.toonshader/Runtime/UniversalRP/Shaders/UniversalToonBodyDoubleShadeWithFeather.hlsl

@@ -84,6 +84,10 @@
                 half3 mainLightColor = GetLightColor(mainLight);
                 float4 _MainTex_var = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, TRANSFORM_TEX(Set_UV0, _MainTex));
 
+#ifdef _DBUFFER
+                ApplyDecalToSurfaceDataUTS(input.positionCS, _MainTex_var.rgb, surfaceData, normalDirection);
+#endif
+
 //v.2.0.4
 #if defined(_IS_CLIPPING_MODE) 
 //DoubleShadeWithFeather_Clipping

com.unity.toonshader/Runtime/UniversalRP/Shaders/UniversalToonBodyShadingGradeMap.hlsl

@@ -81,6 +81,10 @@
 
                 float4 _MainTex_var = SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, TRANSFORM_TEX(Set_UV0, _MainTex));
 
+#ifdef _DBUFFER
+                ApplyDecalToSurfaceDataUTS(input.positionCS, _MainTex_var.rgb, surfaceData, normalDirection);
+#endif
+
 //v.2.0.4
 #ifdef _IS_TRANSCLIPPING_OFF
 //