display_png is a Carnelian-based program used to test displays.
Usage: display_png [--file <file>] [--gamma-file <gamma-file>] [--gamma-divisor <gamma-divisor>] [--background <background>] [--position <position>] [--timeout <timeout>]
Display Png.
Options:
--file PNG file to load
--gamma-file path to file containing gamma values. The file format is a
header line plus three lines of 256 three-digit hexadecimal
value groups.
--gamma-divisor integer value with which to divide the gamma values found in
gamma values file. Does nothing if no gamma file is
specified.
--background background color (default is white)
--position an optional x,y position for the image (default is center)
--timeout seconds of delay before application exits (default is 1
second)
--help display usage information
display_png reads files from the target device's file system. You will need to copy a file to the target as follows:
fx cp [host image path] "[target image path]"
Note that the quoting of the target path is needed for zsh but might not be needed for your shell.
If you are using an SDK, rather than building Fuchsia from source, check your SDK documentation for how to copy files to an attached device.
Once the file is copied, invoking display_png via fx shell should display a png:
$ fx shell display_png --file [file name]