Magpie/Runtime/EffectCache.h

#pragma once
#include "pch.h"
#include "StrUtils.h"
#include "Utils.h"
#include "EffectDesc.h"


class EffectCache {
public:
	static EffectCache& GetInstance() {
		static EffectCache instance;
		return instance;
	}

	bool Load(const wchar_t* fileName, std::string_view hash, EffectDesc& desc);

	void Save(const wchar_t* fileName, std::string_view hash, const EffectDesc& desc);

private:
	void _AddToMemCache(const std::wstring& cacheFileName, const EffectDesc& desc);

	std::unordered_map<std::wstring, EffectDesc> _memCache;

	static constexpr const size_t _MAX_CACHE_COUNT = 100;

	static std::wstring _GetCacheFileName(const wchar_t* fileName, std::string_view hash);

	// 缓存文件后缀名：Compiled MagpieFX
	static constexpr const wchar_t* _SUFFIX = L"cmfx";

	// 缓存版本
	// 当缓存文件结构有更改时将更新它，使得所有旧缓存失效
	static constexpr const UINT _VERSION = 3;
};