Resolution of depth computing

Software ROS2
,
1

Hi, I am using the ros2 wrapper with setting of:

common_stereo.yaml:
    pub_resolution: ‘CUSTOM’
    pub_downscale_factor: 2

zedx.yaml:
    grab_resolution: 'HD1200'

For this setup, is the depth calculated by the resolution of HD1200 then downscale to 960x600, or should it just be computed on the resolution of downscaled resolution?