Well, it will very much depend on the image format of the data (eg. "gif", or "jpg", or "png", or whatever).  Tk only supports certain image formats: 
IMAGE FORMATS
    The photo image code is structured to allow handlers for additiona
+l
    image file formats to be added easily. The photo image code mainta
+ins a
    list of these handlers. Handlers are added to the list by register
+ing
    them with a call to Tk_CreatePhotoImageFormat. The standard Tk
    distribution comes with handlers for XBM, XPM, BMP, JPEG, PNG and
    PPM/PGM formats, which are automatically registered on initializat
+ion.

[download]

and in the next paragraph ... 

    Usually this will find the correct handler, but if it doesn't,
    the user may give a format name with the -format option to
    specify which handler to use.

[download]

I'm assuming you know what the image format is of the image you have in memory.  Why not just try displaying the image yourself?  As the Tk documentation illustrates, you can use: 

my $img = $mw->Photo(-data => $data);

[download]

and if necessary supply -format => FORMAT (for one of the valid IMAGE FORMATS above).

Have you tried doing that yet?

s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/

In reply to Re^3: Tk:Photo -data with binary data? by liverpole
in thread Tk:Photo -data with binary data? by BrowserUk

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