glBuffer.h

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/*
 * Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
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#ifndef __GL_BUFFER_H__
#define __GL_BUFFER_H__
 
 
#include "cudaUtility.h"
#include "cuda_gl_interop.h"
 
 
#define GL_VERTEX_BUFFER        GL_ARRAY_BUFFER
 
#define GL_INDEX_BUFFER                 GL_ELEMENT_ARRAY_BUFFER
 
#define GL_MAP_CPU                      0x1
 
#define GL_MAP_CUDA             0x2
 
#define GL_FROM_CPU                     0x3
 
#define GL_FROM_CUDA            0x4
 
#define GL_TO_CPU                       0x5
 
#define GL_TO_CUDA                      0x6
 
#define GL_WRITE_DISCARD        (GL_READ_WRITE + 0xff) 
 
#ifndef GL_WRITE_ONLY
#define GL_WRITE_ONLY           GL_WRITE_ONLY_ARB
#endif
 
#ifndef GL_READ_ONLY
#define GL_READ_ONLY            GL_READ_ONLY_ARB
#endif
 
#ifndef GL_READ_WRITE
#define GL_READ_WRITE           GL_READ_WRITE_ARB
#endif
 
 
class glBuffer
{
public:
        static glBuffer* Create( uint32_t type, uint32_t size, void* data=NULL, uint32_t usage=GL_STATIC_DRAW );
        
        static glBuffer* Create( uint32_t type, uint32_t numElements, uint32_t elementSize, void* data=NULL, uint32_t usage=GL_STATIC_DRAW );
        
        ~glBuffer();
 
        bool Bind();
 
        void Unbind();
        
        inline uint32_t GetID() const                   { return mID; }
 
        inline uint32_t GetType() const         { return mType; }
 
        inline uint32_t GetSize() const         { return mSize; }
 
        inline uint32_t GetNumElements() const  { return mNumElements; }
 
        inline uint32_t GetElementSize() const  { return mElementSize; }
 
        void* Map( uint32_t device, uint32_t flags );
 
        void Unmap();
 
        bool Copy( void* ptr, uint32_t flags );
 
        bool Copy( void* ptr, uint32_t size, uint32_t flags );
 
        bool Copy( void* ptr, uint32_t offset, uint32_t size, uint32_t flags );
 
private:
        glBuffer();
 
        bool init( uint32_t type, uint32_t size, void* data, uint32_t usage);
        
        uint32_t mID;
        uint32_t mSize;
        uint32_t mType;
        uint32_t mUsage;
 
        uint32_t mNumElements;
        uint32_t mElementSize;
 
        uint32_t mMapDevice;
        uint32_t mMapFlags;
 
        cudaGraphicsResource* mInteropCUDA;
};
 
 
#endif