Peefh a exprim? avec pr?cision :
> Images in Ruby
> ==============
>
>
> A few days ago, I asked a question about using .PNG Images in a Ruby/Tk 
> environnement, but I forgot to give some data.
>
> - What I have: WinXP Home SP1, Ruby 1.8.0, Tk8.3, *no* compiler.
>
> - What I'd like to do: to use a ".PNG" TkPhotoImage to show it as TkcImage in 
> a TkCanvas.
>
> I'm playing with 640x640 pictures (256 colors), for whitch the sizes are 
> about:
>    .BMP (windows) -> 410 Kb
>    .PNG -> 120 Kb
>    .PPM -> 1200 Kb
> I have to use hundreds of them...
>
> Somebody suggested me to use "GD", whitch is a good tool for using .PNG/.JPG 
> but from whitch I cannot build any TkPhotoImage(s), or whitch I *don't know* 
> how to use in TkCanvas.
>
> Did someone try to do that?
> Thank you.

Eureka!
I store files in .png format, and I transform in .ppm format just 
before use... No other way :-(

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