What function in the server is called when a client make a XRenderComposite request?

[Carlos Eduardo Rodrigues Diógenes]

Hi,

What function in the server is called when a client make a
XRenderComposite request?

That is a pattern for mapping this? Where is the code that resolve the
request made by XRenderComposite?

I read the appendix of Writing Extensions to X for the Xlib Programming
Manual, but this does not help much, since it's don't cover server side
implementation.
-- 
Carlos Eduardo Rodrigues Diógenes