typedef struct {  struct jpeg_destination_mgr pub; /* public fields */  int size;  JOCTET * buffer;		/* start of buffer */} buf_destination_mgr;typedef buf_destination_mgr * buf_dest_ptr;METHODDEF(void)init_destination (j_compress_ptr cinfo){  buf_dest_ptr dest = (buf_dest_ptr) cinfo->dest;  dest->size = 65536*256;  /* Allocate the output buffer --- it will be released when done with image */  dest->buffer = (JOCTET *) malloc(dest->size * sizeof(JOCTET));  dest->pub.next_output_byte = dest->buffer;  dest->pub.free_in_buffer = dest->size;}METHODDEF(boolean)empty_output_buffer (j_compress_ptr cinfo){  buf_dest_ptr dest = (buf_dest_ptr) cinfo->dest;  printf("TOO BIG!\n");	exit (0);  return TRUE;}METHODDEF(void)term_destination (j_compress_ptr cinfo){  buf_dest_ptr dest = (buf_dest_ptr) cinfo->dest;  size_t datacount = dest->size - dest->pub.free_in_buffer;  dest->size=datacount;}//in main or wherever:   if (cinfo.dest == NULL) {	// first time for this JPEG object?     cinfo.dest = (struct jpeg_destination_mgr *)      (*cinfo.mem->alloc_small) ((j_common_ptr) &cinfo, JPOOL_PERMANENT,				  SIZEOF(buf_destination_mgr));  }  dest = (buf_dest_ptr) cinfo.dest;  dest->pub.init_destination = init_destination;  dest->pub.empty_output_buffer = empty_output_buffer;  dest->pub.term_destination = term_destination;//and finally, output to whever (Eg: a file) fwrite(dest->buffer,dest->size,1,outfile);