GFxResourceKey.h

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#pragma once
 
namespace RE
{
    class GFxResourceKey
    {
    public:
        using KeyHandle = void*;
 
        enum class KeyType
        {
            kNone,
            kUnique,
            kFile,
            kGradient,
            kSubImage
        };
 
        class KeyInterface
        {
        public:
            virtual ~KeyInterface();  // 00
 
            // add
            virtual void        AddRef(KeyHandle a_data) = 0;                                    // 01
            virtual void        Release(KeyHandle a_data) = 0;                                   // 02
            virtual KeyType     GetKeyType(KeyHandle a_data) const = 0;                          // 03
            virtual UPInt       GetHashCode(KeyHandle a_data) const = 0;                         // 04
            virtual bool        KeyEquals(KeyHandle a_data, const GFxResourceKey& a_other) = 0;  // 05
            virtual const char* GetFileURL(KeyHandle a_data) const;                              // 06
        };
 
        class HashOp
        {
        public:
            UPInt operator()(const GFxResourceKey& a_key)
            {
                return a_key._keyInterface ? a_key._keyInterface->GetHashCode(a_key._keyData) : 0;
            }
        };
 
        GFxResourceKey();
        GFxResourceKey(KeyInterface* a_keyIntfc, KeyHandle a_keyHandle);
        GFxResourceKey(const GFxResourceKey& a_rhs);
        ~GFxResourceKey();
 
        GFxResourceKey&             operator=(const GFxResourceKey& a_rhs);
        bool                        operator==(const GFxResourceKey& a_other) const;
        [[nodiscard]] KeyType       GetKeyType() const;
        [[nodiscard]] const char*   GetFileURL() const;
        [[nodiscard]] KeyInterface* GetKeyInterface() const;
        [[nodiscard]] KeyHandle     GetKeyData() const;
 
    protected:
        // members
        KeyInterface* _keyInterface;  // 00
        KeyHandle     _keyData;       // 08
    };
    static_assert(sizeof(GFxResourceKey) == 0x10);
}