Shader: Add SpirvDecoder

include/Nazara/Shader/SpirvDecoder.hpp

@@ -0,0 +1,59 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Shader generator"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_SPIRVDECODER_HPP
+#define NAZARA_SPIRVDECODER_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Shader/Config.hpp>
+#include <Nazara/Shader/SpirvData.hpp>
+#include <functional>
+#include <string>
+#include <vector>
+
+namespace Nz
+{
+	class NAZARA_SHADER_API SpirvDecoder
+	{
+		public:
+			SpirvDecoder() = default;
+			SpirvDecoder(const SpirvDecoder&) = default;
+			SpirvDecoder(SpirvDecoder&&) = default;
+			~SpirvDecoder() = default;
+
+			void Decode(const UInt32* codepoints, std::size_t count);
+
+			SpirvDecoder& operator=(const SpirvDecoder&) = default;
+			SpirvDecoder& operator=(SpirvDecoder&&) = default;
+
+		protected:
+			struct SpirvHeader;
+
+			inline const UInt32* GetCurrentPtr() const;
+
+			virtual bool HandleHeader(const SpirvHeader& header);
+			virtual bool HandleOpcode(const SpirvInstruction& instruction, UInt32 wordCount) = 0;
+
+			std::string ReadString();
+			UInt32 ReadWord();
+
+			struct SpirvHeader
+			{
+				UInt32 generatorId;
+				UInt32 bound;
+				UInt32 schema;
+				UInt32 versionNumber;
+			};
+
+		private:
+			const UInt32* m_currentCodepoint;
+			const UInt32* m_codepointEnd;
+	};
+}
+
+#include <Nazara/Shader/SpirvDecoder.inl>
+
+#endif