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Packages/com.waveharmonic.crest/Runtime/Scripts/Data/ShadowLod.Legacy.cs

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+// Crest Water System
+// Copyright © 2024 Wave Harmonic. All rights reserved.
+
+using UnityEngine;
+using UnityEngine.Rendering;
+
+namespace WaveHarmonic.Crest
+{
+    partial class ShadowLod
+    {
+        internal void OnBeginCameraRendering(ScriptableRenderContext context, Camera camera)
+        {
+            // TODO: refactor this similar to MaskRenderer.
+            if (!RenderPipelineHelper.IsLegacy)
+            {
+#if d_UnityURP
+                if (RenderPipelineHelper.IsUniversal)
+                {
+                    SampleShadowsURP.EnqueuePass(context, camera);
+                }
+#endif
+
+                return;
+            }
+
+#if UNITY_EDITOR
+            // Do not execute when editor is not active to conserve power and prevent possible leaks.
+            if (!UnityEditorInternal.InternalEditorUtility.isApplicationActive)
+            {
+                CopyShadowMapBuffer?.Clear();
+                return;
+            }
+
+            if (!WaterRenderer.IsWithinEditorUpdate)
+            {
+                CopyShadowMapBuffer?.Clear();
+                return;
+            }
+#endif
+
+            var water = _Water;
+
+            if (water == null)
+            {
+                return;
+            }
+
+            if (!WaterRenderer.ShouldRender(camera, water.Surface.Layer))
+            {
+                return;
+            }
+
+            if (camera == water.Viewer && CopyShadowMapBuffer != null)
+            {
+                if (_Light != null)
+                {
+                    // Calling this in OnPreRender was too late to be executed in the same frame.
+                    _Light.RemoveCommandBuffer(LightEvent.BeforeScreenspaceMask, CopyShadowMapBuffer);
+                    _Light.AddCommandBuffer(LightEvent.BeforeScreenspaceMask, CopyShadowMapBuffer);
+                }
+
+                // Disable for XR SPI otherwise input will not have correct world position.
+                Rendering.BIRP.DisableXR(CopyShadowMapBuffer, camera);
+
+                BuildCommandBuffer(water, CopyShadowMapBuffer);
+
+                // Restore XR SPI as we cannot rely on remaining pipeline to do it for us.
+                Rendering.BIRP.EnableXR(CopyShadowMapBuffer, camera);
+            }
+        }
+
+        internal void OnEndCameraRendering(Camera camera)
+        {
+            if (!RenderPipelineHelper.IsLegacy)
+            {
+                return;
+            }
+
+#if UNITY_EDITOR
+            // Do not execute when editor is not active to conserve power and prevent possible leaks.
+            if (!UnityEditorInternal.InternalEditorUtility.isApplicationActive)
+            {
+                CopyShadowMapBuffer?.Clear();
+                return;
+            }
+
+            if (!WaterRenderer.IsWithinEditorUpdate)
+            {
+                CopyShadowMapBuffer?.Clear();
+                return;
+            }
+#endif
+
+            var water = _Water;
+
+            if (water == null)
+            {
+                return;
+            }
+
+            if (!WaterRenderer.ShouldRender(camera, water.Surface.Layer))
+            {
+                return;
+            }
+
+            if (camera == water.Viewer)
+            {
+                // CBs added to a light are executed for every camera, but the LOD data is only
+                // supports a single camera. Removing the CB after the camera renders restricts the
+                // CB to one camera. Careful of recursive rendering for planar reflections, as it
+                // executes a camera within this camera's frame.
+                if (_Light != null && CopyShadowMapBuffer != null)
+                {
+                    _Light.RemoveCommandBuffer(LightEvent.BeforeScreenspaceMask, CopyShadowMapBuffer);
+                }
+            }
+        }
+    }
+}