ply-image: Add --print-resolution flag.

This adds a new flag that instructs ply-image to print the
space-separated framebuffer width and height to stdout.

I'm also updating the usage method to list all flags.

TEST=manual: --print-resolution works; previous behavior still works too

Change-Id: I52a3c0570384026247b95c4ab2b642fe26f2edd4
Reviewed-by: Daniel Erat <>
Tested-by: Daniel Erat <>
Commit-Ready: Daniel Erat <>
1 file changed