Re: MIT-SHM example

["Rose Cumming" <rose_alice_cumming hotmail com>]

I'm not confused.
My application (client) and the X server are running on the same machine.

I want to have very high frame rates to playback my raw data images.
I have tried drawing primitives like draw_rgb_image and draw_gray_image.

What you said was consistent with previous email archieves I read. Using 
MIT-SHM will avoid network flow because the image (Xmage) use shared memory 
when the client and server are on the same machine.
I have this link
http://ftp.xfree86.org/pub/XFree86/4.5.0/doc/mit-shm.txt
that talks about shared memory XImage.

but if anyone has working example of how to set up a simple application, it 
would be greatly appreciated.

> From: Paul Davis <paul linuxaudiosystems com>
> Reply-To: paul linuxaudiosystems com
> To: Rose Cumming <rose_alice_cumming hotmail com>
> CC: gtkmm-list gnome org
> Subject: Re: MIT-SHM example
> Date: Mon, 19 Sep 2005 09:42:19 -0400
>
> On Fri, 2005-09-16 at 17:03 +0000, Rose Cumming wrote:
> > Hello all,
> >
> > Does anyone have a reference to an example of how to use MIT shared 
> memory
> > extension?
> > I use gtkmm 2.2 and try to render an image using MIT-SHM on a gtkmm 
> window.
> >
> > A simple client example of setting up the window, and modify raw pixel 
> will
> > help.
> > Perhaps a reference to the MIT-SHM API will help. I can't find any 
> clues.
>
> you're a little confused, i believe.
>
> client-side software doesn't use the MIT-SHM unless its part of the Xlib
> implementation that talks to the X server. its just way to (drastically)
> reduce the amount of data passed over the serialized communication link
> with the server. but its very very low level; even GDK (the drawing kit)
> doesn't really mess with things at that level.
>
> if you are writing stuff that renders images, you have no reason to
> think about whether MIT-SHM exists or not - Xlib will take care of that
> for you.
>
> --p

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