Re: MIT-SHM example

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
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.


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