vid_get_viewport_row_offset   32 include/viewport.h extern int vid_get_viewport_row_offset();       // Difference between physical width of viewport and displayed width (in bytes)
vid_get_viewport_row_offset  180 modules/module_exportlist.c             vid_get_viewport_row_offset
vid_get_viewport_row_offset  256 modules/zebra.c     viewport_row_offset = vid_get_viewport_row_offset();