Spring-cleaning of gtk peers.

[Sven de Marothy]

Hi,
Well, I got started on fixing transparency issues with AWT, and now it
seems I'm ending up rewriting most of the image-handling code here.

Most of how this stuff is implemented now makes no sense to me at all.

I propose (and am working on) the following main points:
1) GtkImage is a mess, and is terribly inefficient. Do what was intended
with the AWT 1.1 API and wrap something which can be blitted quickly,
e.g. a 32-bit int vector in gtk-compatible AABBGGRR format.

2) Get rid of GtkImagePainter completely. I have no idea why GtkImage
can't have package-private methods for drawing itself. (And do so
correctly.)

3) Get rid of GtkOffScreenImage. It doesn't seem to serve any real
purpose.

End result: Less code, simpler code and much, much faster drawing.

Is there anyone in defense of the existing way images are handled?

/Sven