Nella Mailing List Internazionale è comparso un messaggio inerente alla trasparenza con Picture.Fill(). Riporto di seguito sia il messaggio che la risposta di Minisini:
« I'd like to fill (and clear) a picture with a transparent (or
semi-transparent) color, but the Fill() method does not seems to take
the alpha part into account (Color.Transparent gives me a plain white
background). I attached a little test project.
Is it a bug, or is it a known problem with the Qt API ? (as the GTK+
renders it correctly)
Regards,
Adrien. »
« Picture cannot have an alpha channel, except with gb.qt4, and only if
you convert an image with alpha channel to a picture. Because in that
case Qt uses the XRender extension.
GTK+ does not use XRender, so I implemented Picture differently. Picture
and Image are actually the same underlying object, and the image is
converted to a picture internally only if really needed.
I have to implement that behaviour in gb.qt4 too, so that both
components are compatible.
Regards,
--
Benoît Minisini »
