CpuDataWriter.h

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#ifndef GLSDK_MESH_CPU_DATA_WRITER_H
#define GLSDK_MESH_CPU_DATA_WRITER_H

#include <vector>
#include "VertexWriter.h"

namespace glmesh
{

    class CpuDataException : public std::exception
    {
    public:
        virtual ~CpuDataException() throw() {}

        virtual const char *what() const throw() {return message.c_str();}

    protected:
        std::string message;
    };

    class IncompleteVertexException : public CpuDataException
    {
    public:
        IncompleteVertexException()
        {
            message = "All vertices must be complete before attempting to extract them from CpuDataWriter.";
        }
    };



    class CpuDataWriter : public VertexWriter<CpuDataWriter>
    {
    public:
        CpuDataWriter(const VertexFormat &fmt, size_t vertexReserve = 0);



        void Extract(std::vector<char> &output);

        std::vector<char> Copy() const;

        GLuint TransferToBuffer(GLenum target, GLenum usage, GLuint bufferObject = 0) const;

        size_t GetNumVerticesWritten() const {return m_numVerticesWritten;}

    private:
        std::vector<char> m_tempBuffer;
        std::vector<char> m_data;
        const VertexFormat &m_fmt;
        size_t m_numVerticesWritten;

        void *GetPtrForAttrib(size_t currAttrib);

        friend class VertexWriter<CpuDataWriter>;
        const VertexFormat &GetVertexFormat() const {return m_fmt;}
        void WriteAttribute( const void *pData, size_t bytesPerComponent, size_t currAttrib );
    };

}

#endif //GLSDK_MESH_CPU_DATA_WRITER_H