[content automatically redacted] touching PlatformDependent folder

Author: giulia-u3d

Packages/com.unity.render-pipelines.universal/Runtime/Data/UniversalRenderPipelineAsset.cs

@@ -518,6 +518,12 @@ public partial class UniversalRenderPipelineAsset : RenderPipelineAsset<Universa
 
         // Additional lights settings
         [SerializeField] LightRenderingMode m_AdditionalLightsRenderingMode = LightRenderingMode.PerPixel;
+
+#if UNITY_META_QUEST
+#if UNITY_EDITOR // multi_compile _ META_QUEST_LIGHTUNROLL (only on  meta platforms)
+        [ShaderKeywordFilter.RemoveIfNot(1, keywordNames: ShaderKeywordStrings.META_QUEST_LIGHTUNROLL)]
+#endif
+#endif
         [SerializeField] int m_AdditionalLightsPerObjectLimit = 4;
         [SerializeField] bool m_AdditionalLightShadowsSupported = false;
         [SerializeField] ShadowResolution m_AdditionalLightsShadowmapResolution = ShadowResolution._2048;

Packages/com.unity.render-pipelines.universal/Runtime/ForwardLights.cs

@@ -523,7 +523,10 @@ internal void SetupLights(UnsafeCommandBuffer cmd, UniversalRenderingData render
                 cmd.SetKeyword(ShaderGlobalKeywords.ReflectionProbeAtlas, lightData.reflectionProbeAtlas && m_UseForwardPlus && lightData.reflectionProbeBlending); // Needs to match shader stripping
 
                 var asset = UniversalRenderPipeline.asset;
-
+#if UNITY_META_QUEST
+                if (asset != null)
+                    cmd.SetKeyword(ShaderGlobalKeywords.META_QUEST_LIGHTUNROLL, asset.maxAdditionalLightsCount == 1 && asset.additionalLightsRenderingMode != LightRenderingMode.Disabled);
+#endif
                 bool apvIsEnabled = asset != null && asset.lightProbeSystem == LightProbeSystem.ProbeVolumes;
                 #if UNITY_WEBGL && !UNITY_EDITOR
                 apvIsEnabled &= SystemInfo.graphicsDeviceType == GraphicsDeviceType.WebGPU; // APV not supported on WebGL, don't try to enable it. WebGPU is fine, though.

Packages/com.unity.render-pipelines.universal/Runtime/UniversalRenderPipelineCore.cs

@@ -977,6 +977,11 @@ internal static class ShaderGlobalKeywords
         public static GlobalKeyword LinearToSRGBConversion;
         public static GlobalKeyword _ENABLE_ALPHA_OUTPUT;
         public static GlobalKeyword ForwardPlus; // Backward compatibility. Deprecated in 6.1.
+
+#if UNITY_META_QUEST
+        public static GlobalKeyword META_QUEST_LIGHTUNROLL;
+#endif
+
         // TODO: Move following keywords to Local keywords?
         // https://docs.unity3d.com/ScriptReference/Rendering.LocalKeyword.html
         //public static GlobalKeyword TonemapACES;
@@ -1090,6 +1095,10 @@ public static void InitializeShaderGlobalKeywords()
             ShaderGlobalKeywords.LinearToSRGBConversion = GlobalKeyword.Create(ShaderKeywordStrings.LinearToSRGBConversion);
             ShaderGlobalKeywords._ENABLE_ALPHA_OUTPUT = GlobalKeyword.Create(ShaderKeywordStrings._ENABLE_ALPHA_OUTPUT);
             ShaderGlobalKeywords.ForwardPlus = GlobalKeyword.Create(ShaderKeywordStrings.ForwardPlus); // Backward compatibility. Deprecated in 6.1.
+#if UNITY_META_QUEST
+            ShaderGlobalKeywords.META_QUEST_LIGHTUNROLL = GlobalKeyword.Create(ShaderKeywordStrings.META_QUEST_LIGHTUNROLL);
+#endif
+
         }
     }
 
@@ -1422,6 +1431,11 @@ public static class ShaderKeywordStrings
         /// <summary> Deprecated keyword. Use ClusterLightLoop instead. </summary>
         internal const string ForwardPlus = "_FORWARD_PLUS"; // Backward compatibility. Deprecated in 6.1.
 
+#if UNITY_META_QUEST
+        /// <summary> Unroll light loop if there is only one additional light on Meta Quest device . </summary>
+        internal const string META_QUEST_LIGHTUNROLL = "META_QUEST_LIGHTUNROLL";
+#endif
+
         /// <summary> Keyword used for Multi Sampling Anti-Aliasing (MSAA) with 2 per pixel sample count. </summary>
         public const string Msaa2 = "_MSAA_2";
 

Packages/com.unity.render-pipelines.universal/ShaderLibrary/RealtimeLights.hlsl

@@ -24,6 +24,13 @@ struct Light
 #define CLUSTER_LIGHT_LOOP_SUBTRACTIVE_LIGHT_CHECK
 #endif
 
+
+#if defined(UNITY_PLATFORM_META_QUEST) && META_QUEST_LIGHTUNROLL
+	#define UNROLL_ONELIGHT [unroll(1)]
+#else
+	#define UNROLL_ONELIGHT
+#endif
+
 #if USE_CLUSTER_LIGHT_LOOP
     #define LIGHT_LOOP_BEGIN(lightCount) { \
     uint lightIndex; \
@@ -34,6 +41,7 @@ struct Light
     #define LIGHT_LOOP_END } }
 #else
     #define LIGHT_LOOP_BEGIN(lightCount) \
+    UNROLL_ONELIGHT \
     for (uint lightIndex = 0u; lightIndex < lightCount; ++lightIndex) {
     #define LIGHT_LOOP_END }
 #endif

Packages/com.unity.render-pipelines.universal/Shaders/ComplexLit.shader

@@ -135,6 +135,9 @@ Shader "Universal Render Pipeline/Complex Lit"
 
             // -------------------------------------
             // Universal Pipeline keywords
+#if defined(UNITY_PLATFORM_META_QUEST)
+            #pragma multi_compile _ META_QUEST_LIGHTUNROLL
+#endif
             #pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
             #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
             #pragma multi_compile _ EVALUATE_SH_MIXED EVALUATE_SH_VERTEX

Packages/com.unity.render-pipelines.universal/Shaders/Lit.shader

@@ -135,6 +135,9 @@ Shader "Universal Render Pipeline/Lit"
 
             // -------------------------------------
             // Universal Pipeline keywords
+#if defined(UNITY_PLATFORM_META_QUEST)
+            #pragma multi_compile _ META_QUEST_LIGHTUNROLL
+#endif
             #pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
             #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
             #pragma multi_compile _ EVALUATE_SH_MIXED EVALUATE_SH_VERTEX

Packages/com.unity.render-pipelines.universal/Shaders/SimpleLit.shader

@@ -100,6 +100,9 @@ Shader "Universal Render Pipeline/Simple Lit"
 
             // -------------------------------------
             // Universal Pipeline keywords
+#if defined(UNITY_PLATFORM_META_QUEST)
+            #pragma multi_compile _ META_QUEST_LIGHTUNROLL
+#endif
             #pragma multi_compile _ _MAIN_LIGHT_SHADOWS _MAIN_LIGHT_SHADOWS_CASCADE _MAIN_LIGHT_SHADOWS_SCREEN
             #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
             #pragma multi_compile _ EVALUATE_SH_MIXED EVALUATE_SH_VERTEX