DtGlBuffer.h

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/******************************************************************************
** Copyright (c) 2019 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/

#pragma once

#include <string>

#include <vrvGraphicsUtils/vrvGraphicsUtils.h>
#include <vrvGraphicsUtils/DtBufferType.h>
#include <vrvGraphicsUtils/DtUsage.h>
#include <vrvGraphicsUtils/DtCpuAccess.h>

namespace makVrv
{
   class DT_DLL_VRVGRAPHICSUTILS DtGlBuffer
   {
   public:
      DtGlBuffer(const char * name, DtBufferType type, DtUsage usage, DtCpuAccess accessType, bool hasStagingBuffer);

      virtual ~DtGlBuffer();

   private:
      DtGlBuffer(const DtGlBuffer &other);
      DtGlBuffer &operator=(const DtGlBuffer &other);

   public:

      virtual void tearDown(void);

      unsigned int releaseHandle(void);

      virtual bool updateBuffer(const int sizeToTransferInBytes, const void* data);

      virtual void clearBuffer(unsigned int clearValue);

      virtual void bind();
      virtual void unbind();


      virtual unsigned char* stagingBuffer(void) const;

      virtual unsigned char* stagingBufferWithSize(unsigned int requestedSizeInBytes);

      virtual void syncStagingBufferToGpu(unsigned int offset, unsigned int sizeInBytes);

      virtual void syncStagingBufferToGpu();

      virtual bool bufferSubData(unsigned int offset, unsigned int sizeInBytes, const void *data);


      virtual void resetStagingBuffer();

      virtual int sizeInBytes(void) const;

      virtual const unsigned int handle(void) const;

      virtual void setResizeMultiplier(float rmul);

      virtual void setUseIncrementalUpdate(bool incrementalUpdate);

      virtual bool useIncrementalUpdate();

      virtual float resizeMultiplier();

      unsigned int type(void) const;

   protected:

      virtual bool createAndBindBuffer();

      virtual int calculateNewSize(int requestedNewSizeInBytes);

   protected:

      std::string myName;
      unsigned int myHandle;
      unsigned int myType;
      int mySizeInBytes;
      float myResizeMultiplier;
      unsigned char* myStagingBuffer;
      bool myHasStagingBuffer;
      DtUsage myUsage;
      DtCpuAccess myAccessType;

      bool myUseIncrementalUpdate;
      int myLastBufferTransferOffset;
   };

}