#pragma once

#include "Critical.h"
#include "OperatingSystem.h"
#include "ReferenceCounter.h"

namespace Framework
{
    class DX12CopyCommandQueue;
    class DX12DirectCommandQueue;

    //! An interface between main memory and graphics memory
    class DXBuffer : public virtual ReferenceCounter
    {
    protected:
        void* data;
        bool changed;
        int len;
        int elLen;

    public:
        //! Constructor
        //! \param bind The usage of the buffer. Example:
        //! D3D11_BIND_INDEX_BUFFER, D3D11_BIND_VERTEX_BUFFER. \param eLen
        //! Length of a single element in bytes
        DLLEXPORT DXBuffer(int eLen);
        //! Destructor
        DLLEXPORT virtual ~DXBuffer();
        //! Sets the changed flag so that the data is copied again on the
        //! next call of 'copy'
        DLLEXPORT void setChanged();
        //! Changes the length of the buffer on the next call of 'copy'
        //! \param len The length in bytes
        DLLEXPORT void setLength(int len);
        //! Sets what will be copied on the next call of 'copy'
        //! \param data A pointer to the data
        DLLEXPORT void setData(void* data);
        //! Copies the data into the buffer if it has changed
        DLLEXPORT virtual void copyToGPU(int byteCount = -1) = 0;
        //! Returns the length of an element in bytes
        DLLEXPORT int getElementLength() const;
        //! Returns the number of elements in the buffer
        DLLEXPORT int getElementCount() const;
    };
} // namespace Framework