Only make render target 2D textures layered if needed (#2646)

* Only make render target 2D textures layered if needed

* Shader cache version bump

* Ensure topology is updated on channel swap

Ryujinx.Graphics.Shader/ShaderProgramInfo.cs

@@ -11,6 +11,7 @@ namespace Ryujinx.Graphics.Shader
         public ReadOnlyCollection<TextureDescriptor> Images   { get; }
 
         public bool UsesInstanceId { get; }
+        public bool UsesRtLayer { get; }
         public byte ClipDistancesWritten { get; }
 
         public ShaderProgramInfo(
@@ -19,6 +20,7 @@ namespace Ryujinx.Graphics.Shader
             TextureDescriptor[] textures,
             TextureDescriptor[] images,
             bool                usesInstanceId,
+            bool                usesRtLayer,
             byte                clipDistancesWritten)
         {
             CBuffers = Array.AsReadOnly(cBuffers);
@@ -27,6 +29,7 @@ namespace Ryujinx.Graphics.Shader
             Images   = Array.AsReadOnly(images);
 
             UsesInstanceId = usesInstanceId;
+            UsesRtLayer = usesRtLayer;
             ClipDistancesWritten = clipDistancesWritten;
         }
     }

Ryujinx.Graphics.Shader/Translation/EmitterContext.cs

@@ -121,6 +121,11 @@ namespace Ryujinx.Graphics.Shader.Translation
                         break;
                 }
             }
+
+            if (Config.Stage != ShaderStage.Fragment && attribute == AttributeConsts.Layer)
+            {
+                Config.SetUsedFeature(FeatureFlags.RtLayer);
+            }
         }
 
         public void MarkLabel(Operand label)

Ryujinx.Graphics.Shader/Translation/FeatureFlags.cs

@@ -17,8 +17,9 @@ namespace Ryujinx.Graphics.Shader.Translation
 
         Bindless = 1 << 2,
         InstanceId = 1 << 3,
-        CbIndexing = 1 << 4,
-        IaIndexing = 1 << 5,
-        OaIndexing = 1 << 6
+        RtLayer = 1 << 4,
+        CbIndexing = 1 << 5,
+        IaIndexing = 1 << 6,
+        OaIndexing = 1 << 7
     }
 }

Ryujinx.Graphics.Shader/Translation/Translator.cs

@@ -106,6 +106,7 @@ namespace Ryujinx.Graphics.Shader.Translation
                 config.GetTextureDescriptors(),
                 config.GetImageDescriptors(),
                 config.UsedFeatures.HasFlag(FeatureFlags.InstanceId),
+                config.UsedFeatures.HasFlag(FeatureFlags.RtLayer),
                 config.ClipDistancesWritten);
 
             return program;