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Assets/Scripts/UVC/ScriptableRenderFeature/EdgeDetection.cs

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+using System;
+using System.Drawing.Drawing2D;
+using UnityEngine;
+using UnityEngine.Rendering;
+using UnityEngine.Rendering.RenderGraphModule;
+using UnityEngine.Rendering.Universal;
+
+namespace UVC.Rendering
+{
+    public class EdgeDetection : ScriptableRendererFeature
+    {
+        private class EdgeDetectionPass : ScriptableRenderPass
+        {
+            private Material material;
+
+            private static readonly int OutlineThicknessProperty = Shader.PropertyToID("_OutlineThickness");
+            private static readonly int OutlineColorProperty = Shader.PropertyToID("_OutlineColor");
+            public EdgeDetectionPass()
+            {
+                profilingSampler = new ProfilingSampler(nameof(EdgeDetectionPass));
+            }
+
+            public void Setup(ref EdgeDetectionSettings settings, ref Material edgeDetectionMaterial)
+            {
+                material = edgeDetectionMaterial;
+                renderPassEvent = settings.renderPassEvent;
+                material.SetFloat(OutlineThicknessProperty, settings.outlineThickness);
+                material.SetColor(OutlineColorProperty, settings.outlineColor);
+            }
+            private class PassData
+            {
+            }
+
+            public override void RecordRenderGraph(RenderGraph renderGraph, ContextContainer frameData)
+            {
+                var resourceData = frameData.Get<UniversalResourceData>();
+                using var builder = renderGraph.AddRasterRenderPass<PassData>("Edge Detection", out var passData);
+                builder.SetRenderAttachment(resourceData.activeColorTexture, 0);
+                builder.UseAllGlobalTextures(true);
+                builder.AllowPassCulling(false);
+                builder.SetRenderFunc((PassData pd, RasterGraphContext context) =>
+                {
+                    Blitter.BlitTexture(context.cmd, Vector2.one, material, 0);
+                });
+            }
+        }
+
+        [Serializable]
+        public class EdgeDetectionSettings
+        {
+            public RenderPassEvent renderPassEvent = RenderPassEvent.AfterRenderingTransparents;
+            [Range(0, 15)] public float outlineThickness = 3;
+            public Color outlineColor = Color.black;
+            public LayerMask layerMask = ~0;
+        }
+
+        [SerializeField] EdgeDetectionSettings settings;
+        public Material edgeDetectionMaterial;
+        EdgeDetectionPass edgeDetectionPass;
+
+        public override void Create()
+        {
+            edgeDetectionPass ??= new EdgeDetectionPass();
+        }
+
+        public override void AddRenderPasses(ScriptableRenderer renderer, ref RenderingData renderingData)
+        {
+            if (renderingData.cameraData.cameraType == CameraType.Preview
+                || renderingData.cameraData.cameraType == CameraType.Reflection
+                || UniversalRenderer.IsOffscreenDepthTexture(ref renderingData.cameraData))
+            {
+                return;
+            }
+            if (edgeDetectionMaterial == null)
+            {
+                edgeDetectionMaterial= CoreUtils.CreateEngineMaterial(Shader.Find("Custom/EdgeDetectionOutline"));
+                if(edgeDetectionMaterial == null)
+                {
+                    Debug.LogWarning("Not all required materials could be created. Edge Detection will not render.");
+                    return;
+                }
+            }
+
+            edgeDetectionPass.ConfigureInput(ScriptableRenderPassInput.Depth | ScriptableRenderPassInput.Normal | ScriptableRenderPassInput.Color);
+            edgeDetectionPass.requiresIntermediateTexture = true;
+            edgeDetectionPass.Setup(ref settings, ref edgeDetectionMaterial);
+
+            renderer.EnqueuePass(edgeDetectionPass);
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            edgeDetectionPass = null;
+            CoreUtils.Destroy(edgeDetectionMaterial);
+        }
+    }
+}

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