class RenderExtensionStore : public MessageStore

{

  public:

  RenderExtensionStore(Compressor *compressor, Decompressor *decompressor);

  virtual ~RenderExtensionStore();

  virtual const char *name() const

  {

    return "RenderExtension";

  }

  virtual unsigned char opcode() const

  {

    return opcode_;

  }

  virtual unsigned int storage() const

  {

    return sizeof(RenderExtensionMessage);

  }

  //

  // Message handling methods.

  //

  public:

  virtual Message *create() const

  {

    return new RenderExtensionMessage();

  }

  virtual Message *create(const Message &message) const

  {

    return new RenderExtensionMessage((const RenderExtensionMessage &) message);

  }

  virtual void destroy(Message *message) const

  {

    delete (RenderExtensionMessage *) message;

  }

  //

  // In protocol step 5 these methods must be

  // specialized for each of the RENDER opcodes

  // in their minor stores.

  //

  virtual int identitySize(const unsigned char *buffer, unsigned int size);

  virtual int encodeIdentity(EncodeBuffer &encodeBuffer, const unsigned char *buffer,

                                 const unsigned int size, int bigEndian,

                                     ChannelCache *channelCache) const;

  virtual int decodeIdentity(DecodeBuffer &decodeBuffer, unsigned char *&buffer,

                                 unsigned int &size, int bigEndian, WriteBuffer *writeBuffer,

                                     ChannelCache *channelCache) const;

  virtual int parseIdentity(Message *message, const unsigned char *buffer,

                                unsigned int size, int bigEndian) const;

  virtual int unparseIdentity(const Message *message, unsigned char *buffer,

                                  unsigned int size, int bigEndian) const;

  virtual void updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,

                                  const Message *cachedMessage,

                                      ChannelCache *channelCache) const;

  virtual void updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,

                                  ChannelCache *channelCache) const;

  virtual void identityChecksum(const Message *message, const unsigned char *buffer,

                                    unsigned int size, int bigEndian) const;

  virtual void dumpIdentity(const Message *message) const;

  private:

  unsigned char opcode_;

  //

  // Keep pointers to specialized classes.

  //

  RenderMinorExtensionStore *minors_[RENDEREXTENSION_MINOR_OPCODE_LIMIT];

  RenderMinorExtensionStore *generic_;

};