With the introduction of stripped down window items, the WindowPixmap
objects no longer form a hierarchy. WindowPixmap::children() method was
removed.
Surprisingly, the removal of the children() method didn't result in a
compilation error because the QObject class has a method with the same
name.
Currently, a window pixmap will have no QObject children even if the
associated wayland surface has child sub-surfaces. This may result in
blank thumbnails of apps that use sub-surfaces, e.g. Firefox. In order
to fix that issue, we need to check if there are child items instead.
Currently, output properties are looked up either on the wl_output
object or the output device object. This puts a hard dependency on the
wayland server in the platforms.
This change intends to fix some flaws in the current output
abstractions, and allow creating/destroying wayland-specific globals as
we wish.
With the work done in this patch, the need for the AbstractWaylandOutput
class is unclear, and it might be a good idea to merge it with the base
AbstractOutput class.
Currently, we inhibit renderloops when switching to another TTY, and unhibit
when switching back. When we hotplug a display while switched to another TTY,
its renderloop isn't inhibited by default, yet when we switch back, we try
to uninhibit the fresh renderloop, which triggers an assert.
Inhibiting newly created outputs while switched to another TTY fixes this crash.
BUG: 435388
FIXED-IN: 5.21
The connector name is not relevant to applications or
users - expectation is that the same physical monitor always gets the
same name, regardless of how it's connected. If no serial is available,
fall back to the old scheme to prevent multiple connected outputs from
having the same name.
The value that the DrmCrtc::resIndex() function returns is better known
as "pipe index." This change renames the method to match the terminology
used by kernel developers and other compositor developers.
drmModeGetPropertyBlob() may return null and we should handle that. In
addition to that, m_conn is not initialized in DrmConnector so kwin will
crash whenever the connector info is accessed.
Currently, dealing with sub-surfaces is very difficult due to the scene
design being heavily influenced by X11 requirements.
The goal of this change is to re-work scene abstractions to make improving
the wayland support easier.
The Item class is based on the QQuickItem class. My hope is that one day
we will be able to transition to QtQuick for painting scene, but in
meanwhile it makes more sense to have a minimalistic internal item class.
The WindowItem class represents a window. The SurfaceItem class represents
the contents of either an X11, or a Wayland, or an internal surface. The
DecorationItem and the ShadowItem class represent the server-side deco and
drop-shadow, respectively.
At the moment, the SurfaceItem is bound to the scene window, but the long
term plan is to break that connection so we could re-use the SurfaceItem
for things such as software cursors and drag-and-drop additional icons.
One of the responsibilities of the Item is to schedule repaints as needed.
Ideally, there shouldn't be any addRepaint() calls in the core code. The
Item class schedules repaints on geometry updates. In the future, it also
has to request an update if its opacity or visibility changes.
At the moment, the session code is far from being extensible. If we
decide to add support for libseatd, it will be a challenging task with
the current design of session management code. The goal of this
refactoring is to fix that.
Another motivation behind this change is to prepare session related code
for upstreaming to kwayland-server where it belongs.
Otherwise drmModeAtomicCommit() in DrmOutput::doAtomicCommit() fails due
to unmatched buffer sizes.
While rendering continues working properly, this makes drm freak out and
try to go back to a previous state (see the test commit in
presentAtomically()) that in turn starts issuing screen events to every
process even though it's just to say the same thing. The fact that this
happens per frame makes the system unusable as soon as fullscreen starts
happening on a scaled display.
Another thing we could do is get EglGbmBackend::scanout() to take care
of the resizing.
This provides the compositor a way to indicate what output is being
rendered. The effects such as the screenshot can check the provided
screen object in order to function as expected.
If the file descriptor of the DRM device is greater than FD_SETSIZE, the
stack will be corrupted. However, it is highly unlikely that we ever hit
this case because DRM devices are opened at startup of kwin, so the file
descriptors should small.
In order to prevent the potential stack corruption, this change replaces
the usage of select() with poll().
Unlike select(), the api of poll() is much more sensible. Back 20 or so
years ago the main argument against poll() was that it's not implemented
by all platforms. But, nowadays, it's supported on all major platforms.
