let the user choose the screenshot's filetype

My bug at "100 paper cuts" was triaged as invalid, so I'll post here.

https://bugs.launchpad.net/hundredpapercuts/+bug/401701

When I launch Gnome-screenshot, either by the menu or by hitting PrintScreen key, I can save the output file only in PNG format. There should be an option for saving such files as JPEG.

In fact, I believe JPEG should be the default format for saving screenshots in that program, as they take less space on the disk, are easier to upload to a site and download from one. For instance, now I have to make a screenshot, navigate to the folder where it has been saved, open the file in Eye of Gnome and save it there as JPEG before sending it to a friend.

Even if JPEG won't be the default file format in gnome-screenshot, I would be delighted if it could save pictures in JPEG.

I made this patch to determine image format by filename extension.

The attachment "determine_image_format_by_extension.patch" of this bug report has been identified as being a patch. The ubuntu-reviewers team has been subscribed to the bug report so that they can review the patch. In the event that this is in fact not a patch you can resolve this situation by removing the tag 'patch' from the bug report and editing the attachment so that it is not flagged as a patch. Additionally, if you are member of the ubuntu-reviewers team please also unsubscribe the team from this bug report.

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