which is used in the cases where no fallback for direct system support is there
(Linux)

(cherry picked from commit 75e90107)

Conflicts:
	vcl/inc/vcl/bitmapex.hxx
	vcl/inc/vcl/bmpacc.hxx
	vcl/source/gdi/bmpacc.cxx

Change-Id: I6e7a575e01456297e84785a7de14e42e0dc72f5f