Framebuffer (devel question)
chinluchinawa at yahoo.co.uk
Sat Mar 4 09:38:35 PST 2006
I've been playing around with framebuffer, and I've been trying to render an
image within the xserver which is not going to dissapear in one second.
I've tried everything, but it doesn't seem to work. Last thing I've done is
to copy the actual framebuffer's buffer, and paint my image within it, But I
cannot avoid which I think is caused by X's screen refreshes.
Something I thought could help me was KD_GRAPHICS/TEXT ioctls (from
/usr/include/linux/kd.h), but it only works within a tty,
although I'm gonna try rigth now whether it works for devpts, which I
haven't. Anyway when I tried with ttys seems like KD_GRAPHICS doesn't pass
any keypress events, or at least not I how I did it, might need to look at
The target app. I'm referring to, would run on a xserver which is not going
to have a mouse running on it, nor a wm. Just a black background and a xterm
(-fa), for which I need text and images (not overlapping one to each other
at any time) I provide within a ncurses app. of my own. For more info, this
app, doesn't scroll either, it's static, and I've put it to work
successfully within a tty.
I don't know whether I would be able to "blend" somehow my screen's buffer
with the existing xserver's screen buffer, so it would refresh my "custom
background", or whether I might need to start looking at xterm sources and
modify them as needed, so any comments or pointers would my much
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