Added render scale support to screenspace shadowmap.

ScriptableRenderPipeline/LightweightPipeline/LWRP/LightweightPipeline.cs

         private RenderTargetIdentifier m_CopyDepth;
         private RenderTargetIdentifier m_Color;
 
+        private float m_RenderScale;
+
         private bool m_IntermediateTextureArray;
         private bool m_RequireDepthTexture;
         private bool m_RequireCopyColor;
             foreach (Camera camera in cameras)
             {
                 RenderPipeline.BeginCameraRendering(camera);
+                m_CurrCamera = camera;
-                bool sceneViewCamera = camera.cameraType == CameraType.SceneView;
-                bool stereoEnabled = XRSettings.isDeviceActive && !sceneViewCamera && (camera.stereoTargetEye == StereoTargetEyeMask.Both);
-                m_CurrCamera = camera;
+                bool sceneViewCamera = m_CurrCamera.cameraType == CameraType.SceneView;
+                bool stereoEnabled = IsStereoEnabled(m_CurrCamera);
+
+                // XR has it's own scaling mechanism.
+                m_RenderScale = (m_CurrCamera.cameraType == CameraType.Game && !stereoEnabled) ? m_Asset.RenderScale : 1.0f;
                 m_IsOffscreenCamera = m_CurrCamera.targetTexture != null && m_CurrCamera.cameraType != CameraType.SceneView;
 
                 var cmd = CommandBufferPool.Get("");
 
                 FrameRenderingConfiguration frameRenderingConfiguration;
                 SetupFrameRenderingConfiguration(out frameRenderingConfiguration, shadows, stereoEnabled, sceneViewCamera);
-                SetupIntermediateResources(frameRenderingConfiguration, ref context);
+                SetupIntermediateResources(frameRenderingConfiguration, shadows, ref context);
 
                 // SetupCameraProperties does the following:
                 // Setup Camera RenderTarget and Viewport
 
             SetShadowCollectPassKeywords(cmd, visibleLights[lightData.mainLightIndex], ref lightData);
 
-            // TODO: Support RenderScale for the SSSM target.  Should probably move allocation elsewhere, or at
-            // least propogate RenderTextureDescriptor generation
-            if (LightweightUtils.HasFlag(frameRenderingConfiguration, FrameRenderingConfiguration.Stereo))
-            {
-                var desc = XRSettings.eyeTextureDesc;
-                desc.depthBufferBits = 0;
-                desc.colorFormat = m_ShadowSettings.screenspaceShadowmapTextureFormat;
-                cmd.GetTemporaryRT(m_ScreenSpaceShadowMapRTID, desc, FilterMode.Bilinear);
-            }
-            else
-            {
-                cmd.GetTemporaryRT(m_ScreenSpaceShadowMapRTID, m_CurrCamera.pixelWidth, m_CurrCamera.pixelHeight, 0, FilterMode.Bilinear, m_ShadowSettings.screenspaceShadowmapTextureFormat);
-            }
-
             // Note: The source isn't actually 'used', but there's an engine peculiarity (bug) that
             // doesn't like null sources when trying to determine a stereo-ized blit.  So for proper
             // stereo functionality, we use the screen-space shadow map as the source (until we have
 
             bool hdrEnabled = m_Asset.SupportsHDR && m_CurrCamera.allowHDR;
             bool intermediateTexture = m_CurrCamera.targetTexture != null || m_CurrCamera.cameraType == CameraType.SceneView ||
-                m_Asset.RenderScale < 1.0f || hdrEnabled;
+                GetRenderScale() < 1.0f || hdrEnabled;
 
             m_ColorFormat = hdrEnabled ? RenderTextureFormat.DefaultHDR : RenderTextureFormat.Default;
             m_RequireCopyColor = false;
                 configuration |= FrameRenderingConfiguration.IntermediateTexture;
         }
 
-        private void SetupIntermediateResources(FrameRenderingConfiguration renderingConfig, ref ScriptableRenderContext context)
+        private void SetupIntermediateResources(FrameRenderingConfiguration renderingConfig, bool shadows, ref ScriptableRenderContext context)
         {
             CommandBuffer cmd = CommandBufferPool.Get("Setup Intermediate Resources");
 
 
             if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.IntermediateTexture) || m_RequireDepthTexture)
-                SetupIntermediateRenderTextures(cmd, renderingConfig, msaaSamples);
+                SetupIntermediateRenderTextures(cmd, renderingConfig, shadows, msaaSamples);
-        private void SetupIntermediateRenderTextures(CommandBuffer cmd, FrameRenderingConfiguration renderingConfig, int msaaSamples)
+        private void SetupIntermediateRenderTextures(CommandBuffer cmd, FrameRenderingConfiguration renderingConfig, bool shadows, int msaaSamples)
         {
             RenderTextureDescriptor baseDesc;
             if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.Stereo))
 
-            float renderScale = (m_CurrCamera.cameraType == CameraType.Game) ? m_Asset.RenderScale : 1.0f;
+            float renderScale = GetRenderScale();
-
-            // TODO: Might be worth caching baseDesc for allocation of other targets (Screen-space Shadow Map?)
 
             if (m_RequireDepthTexture)
             {
 
                 if (LightweightUtils.HasFlag(renderingConfig, FrameRenderingConfiguration.DepthCopy))
                     cmd.GetTemporaryRT(CameraRenderTargetID.depthCopy, depthRTDesc, FilterMode.Bilinear);
+
+                if (shadows && m_ShadowSettings.screenSpace)
+                {
+                    var screenspaceShadowmapDesc = baseDesc;
+                    screenspaceShadowmapDesc.depthBufferBits = 0;
+                    screenspaceShadowmapDesc.colorFormat = m_ShadowSettings.screenspaceShadowmapTextureFormat;
+                    cmd.GetTemporaryRT(m_ScreenSpaceShadowMapRTID, screenspaceShadowmapDesc, FilterMode.Bilinear);
+                }
             }
 
             var colorRTDesc = baseDesc;
             }
         }
 
-        RendererConfiguration GetRendererSettings(ref LightData lightData)
+        private bool IsStereoEnabled(Camera camera)
+        {
+            bool isSceneViewCamera = camera.cameraType == CameraType.SceneView;
+            return XRSettings.isDeviceActive && !isSceneViewCamera && (camera.stereoTargetEye == StereoTargetEyeMask.Both);
+        }
+
+        private float GetRenderScale()
+        {
+            return m_RenderScale;
+        }
+
+        private RendererConfiguration GetRendererSettings(ref LightData lightData)
         {
             RendererConfiguration settings = RendererConfiguration.PerObjectReflectionProbes | RendererConfiguration.PerObjectLightmaps | RendererConfiguration.PerObjectLightProbe;
             if (lightData.totalAdditionalLightsCount > 0)