No, Tk dosn't have transparency yet. Tk::Zinc will allow window shaping (round windows, etc), but not transparency. You can run Tk and Gtk2 simultaneously in the same script, with a master loop and a timer for the second loop. So you could pop your splashscreen, then remove the Gtk2 and run your Tk. Here is a simple example, just stop the timer after the splashscreen is closed, and undef Gtk2 stuff. 
#!/usr/bin/perl -w
use strict;
use Gtk2;
use Tk;

my $mw = MainWindow->new(-title=>'Tk Window');

Gtk2->init;
my $window = Gtk2::Window->new('toplevel');
$window->set_title('Gtk2 Window');
my $glabel = Gtk2::Label->new("This is a  Gtk2 Label");
$window->add($glabel);
$window->show_all;

my $tktimer = $mw->repeat(10, sub{      
   Gtk2->main_iteration while Gtk2->events_pending;
   #manually pump the Gtk2 eventloop as a slave
  });

my $tktimer1 = $mw->after(1000, sub{      
   $window->destroy;
   Gtk2->main_iteration while Gtk2->events_pending;
   $tktimer->cancel;
  });


$mw->Button(-text=>'     Quit     ',
       -command => sub{exit}
        )->pack();

MainLoop;

[download]
I'm not really a human, but I play one on earth Remember How Lucky You Are

In reply to Re^3: Splashscreen with transparency by zentara
in thread Splashscreen with transparency by ldx

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.