Add view mode properties for lightmap, depth offset and per pixel displacement

Assets/ScriptableRenderPipeline/HDRenderPipeline/Debug/DebugDisplay.cs

         {
             None = 0,
             Tessellation = DebugViewGbuffer.BakeDiffuseLightingWithAlbedoPlusEmissive + 1,
+            PerPixelDisplacement,
+            DepthOffset,
+            Lightmap,
         }
     }
 

Assets/ScriptableRenderPipeline/HDRenderPipeline/Debug/DebugDisplay.cs.hlsl

 //
 #define DEBUGVIEWPROPERTIES_NONE (0)
 #define DEBUGVIEWPROPERTIES_TESSELLATION (12)
+#define DEBUGVIEWPROPERTIES_PER_PIXEL_DISPLACEMENT (13)
+#define DEBUGVIEWPROPERTIES_DEPTH_OFFSET (14)
+#define DEBUGVIEWPROPERTIES_LIGHTMAP (15)
 
 //
 // UnityEngine.Experimental.Rendering.HDPipeline.FullScreenDebugMode:  static fields

Assets/ScriptableRenderPipeline/HDRenderPipeline/Debug/DebugDisplay.hlsl

     {
         case DEBUGVIEWPROPERTIES_TESSELLATION:
 #ifdef TESSELLATION_ON
-        result = float3(1.0, 0.0, 0.0);
+            result = float3(1.0, 0.0, 0.0);
+#else
+            result = float3(0.0, 0.0, 0.0);
+#endif
+            break;
+
+        case DEBUGVIEWPROPERTIES_PER_PIXEL_DISPLACEMENT:
+#ifdef _PER_PIXEL_DISPLACEMENT // Caution: This define is related to a shader features (But it may become a standard features for HD
+            result = float3(1.0, 0.0, 0.0);
+#else
+            result = float3(0.0, 0.0, 0.0);
+#endif
+            break;
+
+        case DEBUGVIEWPROPERTIES_DEPTH_OFFSET:
+#ifdef _DEPTHOFFSET_ON  // Caution: This define is related to a shader features (But it may become a standard features for HD
+            result = float3(1.0, 0.0, 0.0);
-        result = float3(0.0, 1.0, 0.0);
+            result = float3(0.0, 0.0, 0.0);
+
+        case DEBUGVIEWPROPERTIES_LIGHTMAP:
+#if defined(LIGHTMAP_ON) || defined (DIRLIGHTMAP_COMBINED) || defined(DYNAMICLIGHTMAP_ON)
+            result = float3(1.0, 0.0, 0.0);
+#else
+            result = float3(0.0, 0.0, 0.0);
+#endif
+            break;
+
     }
 }