Texture handle

texhandle

#define CREATE_HANDLE(Name, Creator, Deleter, Binder) \
    class Name : public boost::noncopyable { \
        GLuint id; \
    public: \
        void init () { \
            Creator(1, &id); \
            if (!id) \
                throw std::runtime_error(std::string("Error creating ") + #Name); \
        } \
        void bind (GLenum target) { \
            Binder(target, id); \
        } \
        void recreate () { \
            Deleter(1, &id); \
            Creator(1, &id); \
            if (!id) \
                throw std::runtime_error(std::string("Error re-creating ") + #Name); \
        } \
        ~Name() { \
            if (id && glIsTexture(id)) \
                Deleter(1, &id); \
        } \
    }; 

    CREATE_HANDLE(TextureHandle, glGenTextures, glDeleteTextures, glBindTexture)
    CREATE_HANDLE(RenderbufferHandle, glGenRenderbuffers, glDeleteRenderbuffers, glBindRenderbuffer)
    CREATE_HANDLE(VertexBufferHandle, glGenBuffers, glDeleteBuffers, glBindBuffer);
#undef CREATE_HANDLE