On 11/03/2014 21:06, Hongze Zhao wrote: > Hi List, > > I am curious about how screenshot in an OS running Xorg works? I guess Linux > does not provide such > a system call or interface. Is screenshot implemented by calling a special > xorg interface?
I use XLib function XGetImage <http://tronche.com/gui/x/xlib/graphics/XGetImage.html>. It performs a raw dump of a drawable (a Window or a Pixmap). But you must convert the data into a high level image format (png, jpg) using an external lib. >From the X.Org inner (DDX, Module, ...) You can also call this function >through the ScreenRec structure. -- Alexandre Confiant-Latour @ : a...@user-unfriendly.net Jabber : chouke...@im.apinc.org GPG Key ID: 0x18CA62CC (pgp.mit.edu) _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: http://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s
