Re: new toolbar icons are problematic

[Jan D.]

> Miles Bader <address@hidden> writes:
>
> > What do you mean "doesn't support transparency"?  It's necessary to
> > have at least a simple "show background" color, because the toolbar
> > color is not a guaranteed constant.
>
> It wasn't necessary before gtk support; the heuristic worked well.  I
> didn't know gtk required it.

GTK requires it because the whole toolbar is done in GTK.  For other
toolkits, Emacs does the toolbar by itself, using X primitives.
But I do think transparency is required.  When libXpm is used, that
library builds the mask for the icon by looking at the transparent
parts of the icon.  No transparency would mean a fixed background
colour, which might not correspond to the toolbar background.

        Jan D.