Have you looked at Tk::Zinc?

TkZinc is another Canvas which proposes many new functions, some based on openGL

Since the 3.2.2 version, TkZinc also offers as a runtime option, the support for openGL rendering, giving access to features such as antialiasing, transparency, color gradients and even a new, openGL oriented, item type triangles.

TkZinc is available as source in tar.gz format or as Debian or RedHat/Mandrake packages at http://freshmeat.net/projects/zincisnotcanvas/

UPDATE: TkZinc is broken if your Tk version is newer than 802.03

Tk::Zinc object version 804.03 does not match bootstrap parameter 804.
+032 at C:/Perl64/lib/DynaLoader.pm line 214.
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
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I was able to workaround this issue (I have Tk 804.032) by changing the following line in .../site/lib/Tk/Zinc.pm

bootstrap Tk::Zinc $Tk::VERSION;
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to

bootstrap Tk::Zinc '804.03';
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Now no errors are reported when I run a script that includes use Tk::Zinc;

WARNING: I do not know if making this change will cause other issues though.