Re: Screen Capturing

Re: Screen Capturing

[Geert Uytterhoeven]

On Fri, 27 Dec 2002, Abhilash wrote:
> I need to capture the screen .For that I use mirror driver in Windows for
> capturing screen.
> ie, its basically overloading the driver functions.
> 
> So in case of Linux, is there any method like this or which is the best
> method?
> In Xlib there are some functions to capture screen and also heard abt VESA
> which is better?

If you are using a frame buffer device, you can capture the contents of
/dev/fb*. Either read from /dev/fb*, or mmap() it. The data you receive are in
the native format of the graphics chip. For CLUT modes, you have to use an
ioctl() to get the colormap.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds



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Re: Screen Capturing

[Abhilash]

Hello,

Thank you very much.
Let me check this.

Thank you,
Abhilash.

----- Original Message -----
From: "Geert Uytterhoeven" <geert@linux-m68k.org>
To: "Abhilash" <abhilash@avenir.net>
Cc: "Linux Frame Buffer Device Development"
<linux-fbdev-devel@lists.sourceforge.net>
Sent: Friday, December 27, 2002 5:03 PM
Subject: Re: [Linux-fbdev-devel] Screen Capturing


> On Fri, 27 Dec 2002, Abhilash wrote:
> > I need to capture the screen .For that I use mirror driver in Windows
for
> > capturing screen.
> > ie, its basically overloading the driver functions.
> >
> > So in case of Linux, is there any method like this or which is the best
> > method?
> > In Xlib there are some functions to capture screen and also heard abt
VESA
> > which is better?
>
> If you are using a frame buffer device, you can capture the contents of
> /dev/fb*. Either read from /dev/fb*, or mmap() it. The data you receive
are in
> the native format of the graphics chip. For CLUT modes, you have to use an
> ioctl() to get the colormap.
>
> Gr{oetje,eeting}s,
>
> Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 --
geert@linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker.
But
> when I'm talking to journalists I just say "programmer" or something like
that.
>     -- Linus Torvalds
>




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