On Sat, 2012-05-19 at 23:00 +0100, Glynn Clements wrote:
> I've encountered code which uses a background pixmap to implement a
> persistent screen, and drawing to the pixmap then calling XClearWindow
> (without calling XSetWindowBackgroundPixmap in between) results in the
> updated pixmap contents
Am 20.05.2012 05:30, schrieb Keith Packard:
> Glynn Clements writes:
>
>> That seems to imply that the X server makes a copy of the pixmap data
>> rather than keeping a reference to the original pixmap. However, I
>> don't believe that's how the X.org server actually implements it.
>
> No, it
Glynn Clements writes:
> That seems to imply that the X server makes a copy of the pixmap data
> rather than keeping a reference to the original pixmap. However, I
> don't believe that's how the X.org server actually implements it.
No, it keeps a reference, but not through the Pixmap ID, so whil
> The combination of the documentation and the observed behaviour
> implies that the X server *may* copy the pixmap data or it may just
> keep a reference. Either way, deleting the pixmap after setting it
> should be fine, but modifying a pixmap which has been used as a
> background pixmap has unde
James Buren writes:
> Wow, that was fast. Thanks. Some other questions I've been having. I've been
> considering using
> the XRender extension and I've noticed the documentation is nearly
> non-existent. What advantages
> does it offer over older Xlib drawing API? At the very least, it seems to
Wow, that was fast. Thanks. Some other questions I've been having. I've been
considering using
the XRender extension and I've noticed the documentation is nearly
non-existent. What advantages
does it offer over older Xlib drawing API? At the very least, it seems to offer
more complex graphics
op
[I presume that you mean XSetWindowBackgroundPixmap; there is no Xlib
function named XSetBackgroundPixmap.]
James Buren wrote:
> When using this Xlib function to set a new background pixmap, how does the
> old one get
> freed? If I am setting the root window's background pixmap, I don't know ho
When using this Xlib function to set a new background pixmap, how does the old
one get
freed? If I am setting the root window's background pixmap, I don't know how I
can get the
XID of the old one. If it is a window I created, I can cache it but that seems
overkill if I'm
just wanting to discard
