Unix Device Memory Allocation project

[Michel Dänzer]

On 19/10/16 08:40 AM, Marek Olšák wrote:
> 
> 1) DRI (producer: application; consumer: X server)
> - The producer receives these flags: READ, EXPLICIT_FLUSH. The X
> server will treat the shared "texture" as read-only.

FWIW, no, the X server doesn't treat buffers shared with clients via DRI
as read-only.

In particular, pixmaps created from client-side buffers via DRI3 are
normal pixmaps which can be used for all X11 functionality where any
other pixmap can be used. At least the Plasma (KDE) desktop is already
making use of that, as I discovered when looking into
https://bugs.freedesktop.org/show_bug.cgi?id=95475 .

Similarly, with DRI2, shared buffers can be written to by the X server
as well as the client, in particular the (fake) front buffers used for
backing GLX window front buffers and GLX pixmaps.


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer