[7.x.x backport] Fix quality settings UI and shadow mask UI #122 (#123)

* Update HDRenderPipeline.cs

* Update HDRenderPipeline.cs

* Update HDRenderPipeline.cs

* Update CHANGELOG.md

* fix typo

* fix typo 2

Author: sebastienlagarde

com.unity.render-pipelines.high-definition/CHANGELOG.md

@@ -59,6 +59,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Fixed unneeded cookie texture allocation for cone stop lights.
 - Fixed issue when toggling anything in HDRP asset that will produce an error (case 1238155)
 - Diffusion Profile and Material references in HDRP materials are now correctly exported to unity packages. Note that the diffusion profile or the material references need to be edited once before this can work properly.
+- Fixed shadowmask UI now correctly showing shadowmask disable
 
 ### Changed
 - Rejecting history for ray traced reflections based on a threshold evaluated on the neighborhood of the sampled history.

com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/HDRenderPipeline.cs

@@ -103,6 +103,12 @@ internal static Volume GetOrCreateDefaultVolume()
         readonly PostProcessSystem m_PostProcessSystem;
         readonly XRSystem m_XRSystem;
 
+        // Keep track of previous Graphic and QualitySettings value to reset when switching to another pipeline
+        bool m_PreviousLightsUseLinearIntensity;
+        bool m_PreviousLightsUseColorTemperature;
+        bool m_PreviousSRPBatcher;
+        ShadowmaskMode m_PreviousShadowMaskMode;
+
         bool m_FrameSettingsHistoryEnabled = false;
 
         /// <summary>
@@ -660,16 +666,22 @@ void SetRenderingFeatures()
             Shader.globalRenderPipeline = "HDRenderPipeline";
 
             // HD use specific GraphicsSettings
+            m_PreviousLightsUseLinearIntensity = GraphicsSettings.lightsUseLinearIntensity;
             GraphicsSettings.lightsUseLinearIntensity = true;
+            m_PreviousLightsUseColorTemperature = GraphicsSettings.lightsUseColorTemperature;
             GraphicsSettings.lightsUseColorTemperature = true;
-
+            m_PreviousSRPBatcher = GraphicsSettings.useScriptableRenderPipelineBatching;
             GraphicsSettings.useScriptableRenderPipelineBatching = m_Asset.enableSRPBatcher;
 
+            // In case shadowmask mode isn't setup correctly, force it to correct usage (as there is no UI to fix it)
+            m_PreviousShadowMaskMode = QualitySettings.shadowmaskMode;
+            QualitySettings.shadowmaskMode = ShadowmaskMode.DistanceShadowmask;
+
             SupportedRenderingFeatures.active = new SupportedRenderingFeatures()
             {
                 reflectionProbeModes = SupportedRenderingFeatures.ReflectionProbeModes.Rotation,
                 defaultMixedLightingModes = SupportedRenderingFeatures.LightmapMixedBakeModes.IndirectOnly,
-                mixedLightingModes = SupportedRenderingFeatures.LightmapMixedBakeModes.IndirectOnly | SupportedRenderingFeatures.LightmapMixedBakeModes.Shadowmask,
+                mixedLightingModes = SupportedRenderingFeatures.LightmapMixedBakeModes.IndirectOnly | (m_Asset.currentPlatformRenderPipelineSettings.supportShadowMask ? SupportedRenderingFeatures.LightmapMixedBakeModes.Shadowmask : 0),
                 lightmapBakeTypes = LightmapBakeType.Baked | LightmapBakeType.Mixed | LightmapBakeType.Realtime,
                 lightmapsModes = LightmapsMode.NonDirectional | LightmapsMode.CombinedDirectional,
                 lightProbeProxyVolumes = true,
@@ -774,10 +786,12 @@ void UnsetRenderingFeatures()
         {
             Shader.globalRenderPipeline = "";
 
-            SupportedRenderingFeatures.active = new SupportedRenderingFeatures();
+            GraphicsSettings.lightsUseLinearIntensity = m_PreviousLightsUseLinearIntensity;
+            GraphicsSettings.lightsUseColorTemperature = m_PreviousLightsUseColorTemperature;
+            GraphicsSettings.useScriptableRenderPipelineBatching = m_PreviousSRPBatcher;
+            QualitySettings.shadowmaskMode = m_PreviousShadowMaskMode;
 
-            // Reset srp batcher state just in case
-            GraphicsSettings.useScriptableRenderPipelineBatching = false;
+            SupportedRenderingFeatures.active = new SupportedRenderingFeatures();
 
             Lightmapping.ResetDelegate();
         }