This temporary object is a collection of dmabufs and other
parameters that together form a single logical buffer. The temporary
object may eventually create one wl_buffer unless cancelled by
destroying it before requesting ‘create’.
Single-planar formats only require one dmabuf, however
multi-planar formats may require more than one dmabuf. For all
formats, an ‘add’ request must be called once per plane (even if the
underlying dmabuf fd is identical).
You must use consecutive plane indices (‘plane_idx’ argument for ‘add’)
from zero to the number of planes used by the drm_fourcc format code.
All planes required by the format must be given exactly once, but can
be given in any order. Each plane index can be set only once.