Currently compton handles window creation event by immediately query all
the information it needs and create a window struct with that
information. However, this is prone to race conditions.
In the future, we want to react to window creation event by creating a
placeholder in the window stack, and only query window information in a
critical section where the X server is grabbed by us.
This commit split struct win into two struct, one as placeholder, the
other for holding actual window information.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Create a shadow image for a mapped window when it's shadow become enabled.
For unmapped window, the shadow image is created during mapping. Also,
if the window has IMAGE_ERROR flag, it won't be render anyway. So shadow
image won't be created in that case either.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
If a window is unmapped, then mapped to a different position on screen
before fade out is completed (when fading is not enabled, it has to be
mapped again in the same frame), the old window content is left on screen.
This is because when this happens, we didn't add the unmapping window to
damage.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
reg_ignore_valid marks the validity of the reg_ignore of the windows
BENEATH the current window. That is, set `w->reg_ignore_valid = false`
doesn't invalidate `w->reg_ignore`.
When destroying window `w`, we need to invalidate all reg_ignore beneath
`w`. So it is not enough to just set `w->next->reg_ignore_valid =
false`, we also need to invalidate `w->next->reg_ignore`.
Yes, this variable name is confusing. Will be changed in the future.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
paint_preprocess calls redir_start if it decides to redirect the screen.
redir_start might change the state of the windows. For example, when the
image of the window fails to bind, redir_start sets the error flag. And
those state changes might exclude the window from being rendered. Thus,
paint_preprocess should be re-run to make sure the new states are
honoured.
Fixes a crash when window images fail to bind after redirecting.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Make sure before the mapping operation begins, the window is always in
UNUNMAPPED state. This makes it easier to reason about things, such as
resource availability, etc.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Previously we try to keep the image data until the rebind succeeds. This
way even if the rebind fails, we still have something to display.
But that triggers a NVIDIA driver bug. Basically you cannot have more
than one names (XIDs) of a window pixmap. NVIDIA driver doesn't like
that, and binding the pixmap with its aliases will fail. This can
sometimes happen if we name the new pixmap before freeing the old one during
rebind, and the pixmap doesn't actually change (i.e. the rebind is
unnecessary, could happen because of X event handling complications).
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Clear the STALE_IMAGE flag set by win_update_bounding_shape to avoid an
unnecessary image data invalidation.
Mainly to workaround a NVIDIA bug. For more detailed explanation, see
commit 8f67c6190c281955846589d8769385f30e7c5d23
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Instead queue up configure notification while the window is unmapped,
just update the window geometry when the window is mapped.
Simplify the logic a little bit.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Use a flag to mark whether the image needs update, and only update once
per frame.
Also refactor some common code into functions, and handle image errors
properly.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Because when the screen is unredirected, the window resource would have
already been freed. Fix a NULL pointer deref.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Pass the visible region of the image to the backend, so the backend
could optimize based on that information.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Window size change cause window resource to be released and re-acquired,
so it cannot work on unmapped windows.
Previously we make sure of that by skipping fading and change if the
window is mapped. Now we just make sure that functino is never called
with an unmapped window.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
win_update_focused transition window into FADING without checking their
current state, resulting into unmapping windows being brought into
FADING state and stops unmapping.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Previously it is initialized by win_update_bounding_shape, so
configure_win is called when win_data == NULL and state ==
WSTATE_MAPPING, which is an invalid state for a `win` to be in.
Now map_win explicitly calls backend->prepare_win. This is not very
efficient since win_update_bounding_shape will reinit it.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
* Make some functions in win.c pure
* Remove unused code
* Fix misuse of attr_const, const functions shouldn't exam data pointed
to by its pointer arguments.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
When destroying a window, set window->next->reg_ignore_valid to false,
since its reg_ignore is not valid anymore.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Only case where you want to map window in add_win() is during compton
startup, when compton is registering existing windows. Otherwise,
add_win() is always called for newly created windows, so there will
always be a MapNotify coming up for that window. If we map newly created
windows in add_win(), we will try to map it a second time when the MapNotify
arrives.
So, just don't call map_win() from add_win(). For compton startup, we
explicitly call map_win() after calling add_win() in session_init.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
If a window is destroyed and starts to fade out when screen is
unredirected, when the screen become redirected again, we will generate
errors when trying to render that window.
Also make sure the assumption that all window are either MAPPED or
UNMAPPED when screen is unredirected holds.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Now both the old and the new backends are compiled in, the user can
choose which one to use with a command line switch.
Lower the barrier for testing.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Destruction of Input Only windows is erroneously ignored by commit
cea010a, causing future window with the same window id as the destroyed
Input Only window to be treated by an Input Only window even when they
are not. The end result is that some windows don't show up.
Also improved the comments in win.c.
Fixes#119
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
A side effect of this is that some window properties are allowed to
change during fade-in/out. (e.g. window background can become blurred
during window fade out if window properties changed so blur is requirired).
But it is unclear what is the expected behaviour in this case anyway, so we
choose the one that is simpler to implement.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Window state tracking is basically the back bond of window fading. We
add a new enum field to the win struct to track the state of the window,
instead of using a set of boolean variables. We also remove the fading
callbacks, since it is only used for fading, so the potential of code
reuse is lost. And it makes the code slightly harder to understand.
Also fixed a problem that --no-fading-openclose is not behaving as
advertised (from my observation, enabling this flag disables fading
entirely, instead of just diabling it for open/close).
Also uses double for opacity everywhere internally. Use opacity_t only
when setting X opacity prop.
TODO: Remove win::*_last
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Replace most of XFlush with xcb_flush.
Also, in a lot of places, XFlush is used as if it is XSync. Replace
those cases by using xcb's _checked version of functions and
xcb_request_check.
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
Yuxuan Shui