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  Does Tk support JPEG/GIF/XPM/etc?
 As of Tk4.2, Tk supports XBM (X bitmap) for bitmaps as well as PPM
(portable pixmap, a 24 bit format) and GIF (graphics interchange format)
for `photo images`.  Currently only PPM and XBM support the `-data`

The Tk Image Extension ( by Jan
Nijtmans ( contains format handlers for XBM, XPM,
JPEG, GIF89, PNG and TIFF and the `pixmap` image type adopted from Tix
(  Further image formats can be added via DLLs with
the Tk C command `Tk_CreateImageType` (along with code to read that
format, of course).