If that's all you are doing it might be easier to call 'CreateDIBSection' to
create a user-accessible drawing surface which you then blt to the screen
whenever it's changed.
Take a look at http://msdn.microsoft.com/library/techart/msdn_gl6.htm for
various hints and tips.
--
Roger
> -----Original Message-----
> From: Jenkins, Andrew B [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, August 18, 1999 3:28 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [JAVA2D] Drawing on the desktop
>
> It seems like you could use JNI and DirectX to make a "pseudo"
> graphics context. The only method this gc would need to support
> would be a drawImage operation (or something similar) for bltting
> changed pixels to the frame buffer. You could maintain the
> desktop as a Java off-screen image. Whenever that changed, you would
> call drawImage on your psuedo graphics context and transfer
> the updated area.
>
> Just a suggestion.
>
> --Andy
>
> [EMAIL PROTECTED]
> (206) 662-4943
>
> > ----------
> > From: Andrew Dwelly[SMTP:[EMAIL PROTECTED]]
> > Sent: Wednesday, August 18, 1999 1:31 AM
> > To: [EMAIL PROTECTED]
> > Subject: [JAVA2D] Drawing on the desktop
> >
> > Hi All:
> >
> > I was recently having a discussion with some collegues recently about
> > Swing, user interfaces,
> > and so on, and I was complaining about the fact that although my Java
> > development
> > environment is very nice, i.e. it's Java, the actual desktop that I also
> > spend a lot
> > of my mental time working with is rather horrid, i.e. it's NT.
> >
> > We were talking about how this situation might be fixed, in other words,
> > what would it
> > take to create a "Java Desktop" and the main problem appears to be that
> > none of us know how
> > to acquire the desktop as a drawing surface from the underlying OS. By
> > desktop, I mean the underlying
> > screen on which the NT Taskbar appears and the various, icons, shortcuts
> > etc.
> >
> > I spent part of the weekend looking at the DirectX API from MS and it
> > would appear that
> > in fact, it is possible to use this to get access. MS is forced to do
> > this because its
> > the only way to get enough performance for twitch games like Quake.
> > However, creating a
> > JNI interface to DirectX could involve quite a lot of work because in
> > order to use the existing
> > swing frames, windows etc, you presumambly have to somehow support both
> > Graphics and presumambly
> > Graphics2D as well.
> >
> > Given that the Windows desktop is probably the most valuable real estate
> > on the
> > planet, taking it over with a real portable Java Desktop sounds quite
> > attractive. Has anyone got any alternative
> > approaches that would allow us to do this ? As I mentioned, the
> > fundemental issue appears to be drawing on the screen although
> > there may be other problems as well (e.g. capturing _all_ mouse events).
> >
> > All the best.
> >
> > Andy Dwelly
> >
> >
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