With all the mystery issues concerning xwd(1), there is a workable alternative:
import jpg:- | display verified to work on xfce(1), fvwm(1), on Debian 7, 8, 9, i386, amd64. The argument "jpg:" can be any ImageMagick recognized file, (i.e., gif:, png:, etc.) John Richard Hector writes: > On 23/02/18 12:40, Brian wrote: > > On Thu 22 Feb 2018 at 13:35:20 -0800, John Conover wrote: > > > >> > >> xwd > myfile > >> display myfile > >> > >> gives: > >> > >> "display-im6.q16: no decode delegate for this image format `' @ > >> error/constitute.c/ReadImage/504." > >> > >> Anything else read the file and do file conversions? > > > > xwd > myfile.xwd > > display myfile.xwd > > Me too. Seems to work if the file has the .xwd extension, but not otherwise. > > Richard > -- John Conover, cono...@rahul.net, http://www.johncon.com/