Fade in/Fade out of a window with XRender and Xcomposite

[Bin Chen]

On Sat, Feb 16, 2008 at 8:40 PM, Pierre Nicolas-Nicolaz
<dnanar at gmail.com> wrote:
> Hello,
>
>
>  I'm trying to understand how to make a fade in/fade out of a window
>  with the Xrender and Xcomposite extension. From all that i had been
>  able to read over the internet, to do a fade in, i should render the
>  window (that will appear) off-screen with XComposite, then draw it on
>  the screen while playing with the alpha channel brought by the XRender
>  extension ?
>
>
>  As you can see, it's really unclear in my mind, and i do not really
>  success neither to find any good docs on those two extensions, nor to
>  understand the few code examples that I can find over the Internet
>  (they are full of obscure functions like "XRenderFillRectangle" ?!).
>
>
>  So, can anyone give me a good link on how to do things like this, or
>  explain me how to use XRender/XComposite extension please ?
>
http://ktown.kde.org/~fredrik/composite_howto.html, this is a good one.
And you can also refer to the sample code wrote by Keith, named xcompmgr.c

Bin