National Oceanic and
Atmospheric Administration
United States Department of Commerce

Troubleshooting the FRAME command

Troubleshooting the FRAME command

Explanation:

The implementation of the FRAME command in Ferret is quite differentwhen Ferret is initiated with "ferret -gif" versus when it is initiatedwith graphics viewed on an X DISPLAY.

With the X DISPLAY, the FRAME command has to download the current bitmapfrom the X DISPLAY. On some X servers this will work correctly only ifthe DISPLAY is pseudo-color. In the Hummingbird eXceed X server under MSWindows, for example, you need in the Xconfig program to set Video to

ServerVisual: PseudoColor

If you are communicating over an asymmetric connection between your XDISPLAY server and your computer, you may notice that the FRAME commandis slow. This is probably a result of the upstream bandwidth limitationsof the connection.

In most cases, if the FRAME command will not function to your X DISPLAY,you can fall back on "ferret -gif" to obtain GIF output.

If you are running WebFerret, then you need not use the FRAME command.The output graphics that you see in your browser are actually the resultof the Ferret FRAME command, and saving the resulting image with yourbrowser controls is equivalent.


Last modified: Thu Jun 17 07:2