VertexBuffer.h

#pragma once

#include "stdafx.h"
#include "typeDefs3D.h"

#ifdef ENABLE_SDL
class VertexBuffer
{
public:
   enum LockFlags
   {
      WRITEONLY,
      NOOVERWRITE,
      DISCARDCONTENTS = D3DLOCK_DISCARD
   };

   void lock(const unsigned int offsetToLock, const unsigned int sizeToLock, void **dataBuffer, const DWORD flags);
   void unlock(void);
   void release(void);
   void bind();
   static void bindNull() { m_curVertexBuffer = nullptr; }

   static void CreateVertexBuffer(const unsigned int vertexCount, const DWORD usage, const DWORD fvf, VertexBuffer **vBuffer);

   GLuint getOffset() const { return offset; }
   static void UploadBuffers();
private:
   GLuint count;
   GLuint size;
   GLuint sizePerVertex;
   DWORD fvf;
   DWORD usage;
   bool isUploaded;
   bool sharedBuffer;

   // CPU memory management
   unsigned int offsetToLock;
   unsigned int sizeToLock;
   void *dataBuffer;

   //GPU memory management
   GLuint Buffer;
   GLuint Array;
   GLuint offset;//unused ATM, but if we want to group multiple IndexBuffers later in one buffer we might need it

   static VertexBuffer* m_curVertexBuffer; // for caching
   static std::vector<VertexBuffer*> notUploadedBuffers;
   void UploadData();
   void addToNotUploadedBuffers();
};




#else

class VertexBuffer : public IDirect3DVertexBuffer9
{
public:
   enum LockFlags
   {
      WRITEONLY = 0,                        // in DX9, this is specified during VB creation
      NOOVERWRITE = D3DLOCK_NOOVERWRITE,    // meaning: no recently drawn vertices are overwritten. only works with dynamic VBs.
                                            // it's only needed for VBs which are locked several times per frame
                                            DISCARDCONTENTS = D3DLOCK_DISCARD     // discard previous contents; only works with dynamic VBs
   };

   void lock(const unsigned int offsetToLock, const unsigned int sizeToLock, void **dataBuffer, const DWORD flags);
   void unlock(void);
   void release(void);

   static void CreateVertexBuffer(const unsigned int vertexCount, const DWORD usage, const DWORD fvf, VertexBuffer **vBuffer);
   static void setD3DDevice(IDirect3DDevice9* pD3DDevice);
private:
   VertexBuffer();     // disable default constructor
   static IDirect3DDevice9* m_pD3DDevice;
};


#endif