Citrix HDX was introduced in February 2009 with Citrix XenDesktop 3.0 and since then, many features have been added and improvements have been made to this technology to deliver the best possible user experience.
There are basically three main delivery methods that need to be taken care of while configuring HDX policies in your XenApp or XenDesktop environment. They are as follows:
Desktop Composition Redirection or DCR
H.264-enhanced SuperCodec
Legacy graphics mode
Desktop Composition Redirection can be enabled only for desktop OS VDAs in a XenDesktop environment. DCR operates at the level of Windows Desktop Manager, which means that we can now manage the Windows UI using GPU at the end user device, leveraging the DirectX feature of Windows endpoints.
It supports Mac OS X 10.7, 10.8, 10.9, and 10.10 as well as Windows 7, Windows 8, and also the latest Windows OS.