[media] vivid-tpg: add hor/vert downsampling support to tpg_gen_text
[media] vivid-tpg: add hor/vert downsampling support to tpg_gen_text

This will just skip lines/pixels since color fidelity is not quite
as important here as it is with the test patterns themselves.

Signed-off-by: Hans Verkuil <3a513708f73c27e7d36ebc496aa41dad6a3153ea@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <ad86ba2154032c9f55743a190faa2459a9d61d42@osg.samsung.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs