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Reworked conditions, added uber-shaders, comparison nodes, fixed Discard

include/Nazara/Graphics/UberShader.hpp

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+// Copyright (C) 2017 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_UBER_SHADER_HPP
+#define NAZARA_UBER_SHADER_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/Bitset.hpp>
+#include <Nazara/Graphics/Config.hpp>
+#include <Nazara/Shader/ShaderAst.hpp>
+#include <unordered_map>
+
+namespace Nz
+{
+	class ShaderStage;
+
+	class NAZARA_GRAPHICS_API UberShader
+	{
+		public:
+			inline UberShader(ShaderAst shaderAst);
+			~UberShader() = default;
+
+			UInt64 GetConditionFlagByName(const std::string_view& condition) const;
+
+			const std::shared_ptr<ShaderStage>& Get(UInt64 combination);
+
+		private:
+			std::unordered_map<UInt64 /*combination*/, std::shared_ptr<ShaderStage>> m_combinations;
+			ShaderAst m_shaderAst;
+			UInt64 m_combinationMask;
+	};
+}
+
+#include <Nazara/Graphics/UberShader.inl>
+
+#endif // NAZARA_UBER_SHADER_HPP