This extension allows the user to specify whether a full flush is performed when making a context not current.
The only way to set this currently is at context creation, so this patch provides that functionality.
Defualt behaviour is set at FLUSH, as per the spec.
This patch does not contain the changes to WGL, appleGL or other platforms as I do not have access to GL 4.5 hardware on those platforms.
Full details on the use of KHR_context_flush_control can be found here:
https://www.opengl.org/registry/specs/KHR/context_flush_control.txt
This updates to the latest glext.h from Khorons that includes the OpenGL
4.4 specification. It was retrieved from
http://www.opengl.org/registry/api/GL/glext.h at 2014-06-04.
--HG--
extra : rebase_source : 85adb5e14c704f0202041dc0dd9ef9402508f1f6
