this module implements means to display output pixels on screen. in expects rec2020 linear data and will colour manage it for your screen in the gui.
a special display:main module will fill the center space in darkroom mode.
the display named hist will show in the top right corner, and view0 just
below it, if it is found.
these displays can be selected in vkdt-cli on the command
line, and be replaced by file output nodes
individually.
input the sink connector receiving the data