SOLVED Cannot view .pgm and .ppm images

Question

Hi,
I tried to view some .pgm and .ppm images produced by my APT weather satellite image receiver but gqview could not open them. Tried mirage but have same problem. Only gimp opens these type of images.
Last time I tried to view .pgm images was probably more than 3 weeks ago so the problem may have developed after some recent -Syu. Any ideas please?
Looks like the pgm and ppm (at least) file formats spec has changed. I compared with a pgm file saved by gimp and there is a hash-prefixed comment line below the P5. I inserted one in the files produced by my app and now gqview (and others) open them OK. Example:
P5
#comment (anything)
800 600
255
data.........
works ok but:
P5
800 600
255
data.........
can only be opened by gimp.
But still there is another strange problem,  when I "open as text" an uncommented .pgm file in gvim, it seems to go into a long loop trying to open the file and has to be stopped with a user interrupt. With a commented file it has no problem!!??
Last edited by neok (2008-11-01 17:51:30)

Answer 1

Can you attach a screenshot?
*http://en.wikipedia.org/wiki/Screenshot
*https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem
*Use a compressed image type like PNG or JPG to save the screenshot
*Make sure that you do not exceed the maximum size of 1 MB
If images are missing then check that you do not block images from some domains.
*Tap the Alt key or press F10 to show the Menu Bar
Check the permissions for the domain in the currently selected tab in "Tools > Page Info > Permissions"
Check "Tools > Page Info > Media" for blocked images
*Select the first image link and use the cursor Down key to scroll through the list.
*If an image in the list is grayed and "<i>Block Images from...</i>" has a checkmark then remove this checkmark to unblock images from this domain.
Make sure that you do not block (third-party) images, the <b>permissions.default.image</b> pref on the <b>about:config</b> page should be 1.
Make sure that you haven't enabled a High Contrast theme in the Windows/Mac Accessibility settings.
Make sure that you allow pages to choose their own colors.
*Tools > Options > Content : Fonts & Colors > Colors : [X] "Allow pages to choose their own colors, instead of my selections above"
Note that these settings affect background images.
See also:
*http://kb.mozillazine.org/Website_colors_are_wrong
There are extensions like Adblock Plus (Firefox/Tools > Add-ons > Extensions) and security software (firewall, anti-virus) that can block images and other content.
See also:
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
*http://kb.mozillazine.org/Images_or_animations_do_not_load
*http://kb.mozillazine.org/Websites_look_wrong