1 files changed, 43 insertions, 0 deletions
diff --git a/Runtime/Shaders/ShaderKeywords.h b/Runtime/Shaders/ShaderKeywords.h
new file mode 100644
index 0000000..7a273bb
--- /dev/null
+++ b/Runtime/Shaders/ShaderKeywords.h
@@ -0,0 +1,43 @@
+#pragma once
+
+#include <string>
+
+typedef int ShaderKeyword;
+
+// We use about 14 builtin keywords now, 18 more for the user should be fine now
+// (shader size explosion will happen before that limit is reached anyways...)
+const int kMaxShaderKeywords = 64;
+struct ShaderKeywordSet {
+public:
+	explicit ShaderKeywordSet () : mask(0) {}
+
+	void Enable (ShaderKeyword key) { mask |= (0x1ULL<<key); }
+	void Disable (ShaderKeyword key) { mask &= ~(0x1ULL<<key); }
+	bool IsEnabled (ShaderKeyword key) const { return (mask & (0x1ULL<<key)) != 0; }
+	void Reset () { mask = 0; }
+
+	UInt64 GetMask() const { return mask; }
+	void SetMask (UInt64 m) { mask = m; }
+
+	bool operator== (const ShaderKeywordSet& o) const { return mask==o.mask; }
+	bool operator!= (const ShaderKeywordSet& o) const { return mask!=o.mask; }
+
+private:
+	UInt64 mask;
+};
+
+extern ShaderKeywordSet g_ShaderKeywords;
+
+
+namespace keywords {
+	
+	void Initialize();
+	void Cleanup();
+	
+	ShaderKeyword Create( const std::string& name );
+
+	#if UNITY_EDITOR
+	std::string GetKeywordName (ShaderKeyword k);
+	#endif
+	
+} // namespace keywords