OgreGL3PlusHardwareVertexBuffer.h

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/*
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#ifndef __GL3PlusHARDWAREVERTEXBUFFER_H__
#define __GL3PlusHARDWAREVERTEXBUFFER_H__

#include "OgreGL3PlusPrerequisites.h"
#include "OgreHardwareVertexBuffer.h"

namespace Ogre {

    class _OgreGL3PlusExport GL3PlusHardwareVertexBuffer : public HardwareVertexBuffer
    {
        private:
            GLuint mBufferId;
            GLsync mFence;
            // Scratch buffer handling
            bool mLockedToScratch;
            size_t mScratchOffset;
            size_t mScratchSize;
            void* mScratchPtr;
            bool mScratchUploadOnUnlock;

        protected:
            void* lockImpl(size_t offset, size_t length, LockOptions options);
            void unlockImpl(void);

        public:
            GL3PlusHardwareVertexBuffer(HardwareBufferManagerBase* mgr, size_t vertexSize, size_t numVertices,
                                   HardwareBuffer::Usage usage, bool useShadowBuffer);
            ~GL3PlusHardwareVertexBuffer();

            void readData(size_t offset, size_t length, void* pDest);

            void writeData(size_t offset, size_t length, 
                           const void* pSource, bool discardWholeBuffer = false);

            void copyData(HardwareBuffer& srcBuffer, size_t srcOffset, 
                          size_t dstOffset, size_t length, bool discardWholeBuffer = false);

            void _updateFromShadow(void);

            inline GLuint getGLBufferId(void) const { return mBufferId; }
            void setFence(void);
    };
}
#endif // __GL3PlusHARDWAREVERTEXBUFFER_H__