Merge pull request #1877 from Unity-Technologies/fabric-light-vol-fix

Fixing a warning in the fabric shader compilation

com.unity.render-pipelines.high-definition/HDRP/Debug/DebugLightVolume.shader

 
             struct AttributesDefault
             {
-                float4 positionOS : POSITION;
+                float3 positionOS : POSITION;
             };
 
             struct VaryingsDefault
             float3 _Range;
             float3 _Offset;
             float4 _Color;
+            float _RequireToFlipInputTexture;
 
             VaryingsDefault vert(AttributesDefault att) 
             {
                 output.positionCS = TransformWorldToHClip(positionRWS);
+                if (_RequireToFlipInputTexture > 0.0)
+                {
+                    output.positionCS.y = 1.0 - output.positionCS.y;
+                }
                 return output;
             }
 

com.unity.render-pipelines.high-definition/HDRP/Editor/Material/Decal/DecalProjectorComponentEditor.cs

 namespace UnityEditor.Experimental.Rendering.HDPipeline
 {
     [CustomEditor(typeof(DecalProjectorComponent))]
+    [CanEditMultipleObjects]
     public class DecalProjectorComponentEditor : Editor
     {
         private MaterialEditor m_MaterialEditor = null;

com.unity.render-pipelines.high-definition/HDRP/Lighting/LightLoop/LightLoop.cs

                     if (currentHDRLight == null) continue;
 
                     MaterialPropertyBlock materialBlock = new MaterialPropertyBlock();
+                    materialBlock.SetFloat(HDShaderIDs._RequireToFlipInputTexture, hdCamera.camera.cameraType != CameraType.SceneView ? 1.0f : 0.0f);
                     Matrix4x4 positionMat = Matrix4x4.Translate(currentLegacyLight.transform.position);
 
                     if(currentLegacyLight.type == LightType.Point || currentLegacyLight.type == LightType.Area)
                     HDAdditionalReflectionData currentHDProbe = currentLegacyProbe.GetComponent<HDAdditionalReflectionData>();
 
                     MaterialPropertyBlock materialBlock = new MaterialPropertyBlock();
+                    materialBlock.SetFloat(HDShaderIDs._RequireToFlipInputTexture, hdCamera.camera.cameraType != CameraType.SceneView ? 1.0f : 0.0f);
                     Mesh targetMesh = null;
                     if (currentHDProbe.influenceVolume.shape == InfluenceShape.Sphere)
                     {

com.unity.render-pipelines.high-definition/HDRP/Material/Fabric/FabricData.hlsl

     InitBuiltinData(alpha, surfaceData.normalWS, -input.worldToTangent[2], input.positionRWS, input.texCoord1, input.texCoord2, builtinData);
     
     // Support the emissive color and map
-    builtinData.emissiveColor = _EmissiveColor * lerp(float3(1.0, 1.0, 1.0), surfaceData.baseColor.rgb, _AlbedoAffectEmissive);
+    builtinData.emissiveColor = _EmissiveColor.rgb * lerp(float3(1.0, 1.0, 1.0), surfaceData.baseColor.rgb, _AlbedoAffectEmissive);
 #ifdef _EMISSIVE_COLOR_MAP
     // Generate the primart uv coordinates
     float2 uvEmissive = _UVMappingMaskEmissive.x * input.texCoord0 +