NB_FX

Packages/NB_FX/NBShaders2/Editor/FeatureLevel/NBShaderFeatureLevelBuildStripOverride.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using NBShader;
+
+namespace NBShaders2.Editor.FeatureLevel
+{
+    public static class NBShaderFeatureLevelBuildStripOverride
+    {
+        private static readonly Stack<NBShaderFeatureTier> s_OverrideStack = new Stack<NBShaderFeatureTier>();
+
+        public static bool hasOverride { get { return s_OverrideStack.Count > 0; } }
+
+        internal static bool TryGetCurrentTier(out NBShaderFeatureTier tier)
+        {
+            if (s_OverrideStack.Count > 0)
+            {
+                tier = s_OverrideStack.Peek();
+                return true;
+            }
+
+            tier = NBShaderFeatureTier.Ultra;
+            return false;
+        }
+
+        public static IDisposable PushExplicitTier(NBShaderFeatureTier tier)
+        {
+            NBShaderVariantStripper.ResetMissingExplicitTierWarning();
+            s_OverrideStack.Push(tier);
+            return new Scope();
+        }
+
+        private sealed class Scope : IDisposable
+        {
+            private bool m_Disposed;
+
+            public void Dispose()
+            {
+                if (m_Disposed)
+                    return;
+                m_Disposed = true;
+                if (s_OverrideStack.Count > 0)
+                    s_OverrideStack.Pop();
+            }
+        }
+    }
+}