Currently, the frameRendered() signal is emitted every time an effect
calls paintScreen(). This means that the frameRendered() signal can be
emitted more than once when effects such as slide are active. However,
we'd like if it's emitted only once before buffers are swapped.
This allows different input methods to get information about what's
beign typed from the actual hardware. This is especially useful for
non-latin script languages.
If the user has chosen to have a virtual keyboard (i.e. prefered maliit
over none in the KCM) they should get it. If it's too annoying it should
either be disabled or we can fix it so it gets less in the way.
This is especially important since some hardware registers itself as a
keyboard even if it's not a fully functional keyboard.
EffectWindow::shape() doesn't fit the item based design. This change
ports the blur effect away from the shape() function to the rect()
function. The XShape extension was introduced when windows with an alpha
channel wasn't really a thing. Setting a shape served as a way to clip a
window, the most notable example is xeyes.
If an application relies on the xshape extension to actually clip the
window and not to force the window manager not to put the server-side
deco, it most likely doesn't support translucency and therefore it
shouldn't set the blur region to begin with.
This change makes the blur effect ignore the xshape region similar to
the background contrast effect. It allows us to decouple a bit more
effects from the rest of rendering machinery and thus make it easier for
us to move forward with the scene redesign goal.
We used to get a weird line around the window decoration because the
clamping would hit the outside of the rendered decoration.
To make sure we fall inside take the displayPixelRatio into account.
Also on non-integer scales, make sure we are actually falling inside.
It was needed to work around visual glitches in the wobbly windows
effect. Since the wobbly windows effect renders the animated window into
an offscreen texture, we don't need this workaround anymore.
Furthermore, rather than using half-pixel correction, it is more
desirable to use an offscreen texture as it results in simpler design.
Performance-wise, it's not that bad that we need to start looking for
other ways to get rid of the seams between window contents and deco.
DeformEffect is the base class for effects that transform the window
quad grid, e.g. wobbly windows or magic lamp. The main difference
between normal effects and offscreen effects is that the latter renders
animated windows into offscreen textures which are later deformed.
The offscreen texture approach is superior to the half-pixel correction
approach as it produces more visually appealing results. Even with
half-pixel correction, you're still going to see jagged lines between
the main surface and the server-side decoration or drop-shadow.
It is also needed to reduce the number of usages of WindowPaintData::quads
which is needed to move forward with the scene redesign goal.
If the window borders change in such a way that the buffer geometry
doesn't change, but the client geometry does change, we need to configure
the wrapper window and maybe the client window so there are no black
borders, etc.
Currently, there is an assumption in the moveResizeInternal() method
that if the buffer geometry changes, then the client geometry will also
change. However, as it turns out, it's not completely true. For example,
if the window is maximized while its geometry already matches the
maximize area, the buffer geometry won't change, but the client geometry
will change.
This change adds missing geometry checks. *geometryBeforeBlocking
corresponds to the old geometry. We can use it to decide if the geometry
has changed.
If the geometry window rule must be forced, the move resize method has
to force it, but similar to size constraints, we assume that the caller
of the move resize function will do the right thing. So, remove the
debug message to be consistent with other client types.
Similar to the slide effect, the desktop grid can use the clip region to
clip windows when needed. This will improve performance because the desktop
grid effect will do less work. Currently, it clips quads on its own in
prePaintWindow, copies them over in a temporary list, and lets the opengl
scene clip the window quads again.
We can clip windows differently by just passing a custom region to the
paintWindow() function down the effects chain, which the desktop grid
effect already does.
The old behavior and the old bugs are preserved. The Xrender code path is
unaffected.
In general, on Wayland, there is no such a thing as "window scale factor"
because sub-surfaces can have different buffer scales. However, we know
the scale factor of the output where the window is considered to be on. So
we can use the screen's scale factor as the window's scale factor. In
most cases, it will produce the correct result.
For the scene redesign, window quads need to be removed from the effects
api. This change ports the screenshot effect away from quads.
In order to exclude the server-side decoration from the window
screenshot, the effect will render the contents of the client geometry
into the offscreen texture. If the window is client-side decorated, the
entire window will be rendered as before.
The good thing about this approach is that the screenshot effect will do
less work, it won't loop over window quads to compute the bounding rect
or filter out the deco quads.
The backend can now optionally wait for the scene to be created before
it updates its outputs, which is necessary for better atomic tests in
the DRM backend.
The SurfaceItemXwayland has to re-build quads if the shape changes.
The SurfaceItemX11 doesn't need a similar fix as it already discards
quads whenever the shape region changes.
The rnew name is applied when the user hits the return or enter key to
finish renaming, but this is an invisible UI and the user might not
think to do that. This commit replaces the "Rename" button with a
"Confirm new name" button while the text field is editable, so that it's
visibly clear how to finish renaming.
Similar to the feature to allow inline renaming in file managers, you
can now trigger renaming for a desktop by double-clicking on its list
item.
BUG: 421882
FIXED-IN: 5.23
Currently, the implementation of the DecoratedClient and the decoration
renderer are strongly coupled. This poses a problem with the item based
design as the ultimate goal is to have scene items construct paint nodes
which are then fed to the renderer. The DecorationItem has to have
control over the decoration texture. Another issue is that the scene
cannot smoothly cross-fade between two window states if the decoration
is removed, e.g. from fullscreen mode to normal and vice versa.
This change moves the decoration renderer to the decoration item. With
the introduction of a generic scene texture atlas, we hope to get rid of
the decoration renderer altogether.
AbstractClient::doPerformInteractiveMoveResize() is only used by the
X11Client to reset a boolean flag when the client doesn't support sync
counters.
X11Client can call performInteractiveMoveResize() only in two cases: the
sync request timer expires or the client increments the sync counter.
This change removes the AbstractClient::doPerformInteractiveMoveResize()
function and adds a function to handle the case where the sync timer
expires explicitly. This removes a virtual function in the AbstractClient
and makes code more readable.
Window management features were written with synchronous geometry
updates in mind. Currently, this poses a big problem on Wayland because
geometry updates are done in asynchronous fashion there.
At the moment, geometry is updated in a so called pseudo-asynchronous
fashion, meaning that the frame geometry will be reset to the old value
once geometry updates are unblocked. The main drawback of this approach
is that it is too error prone, the data flow is hard to comprehend, etc.
It is worth noting that there is already a machinery to perform async
geometry which is used during interactive move/resize operations.
This change extends the move/resize geometry usage beyond interactive
move/resize to make asynchronous geometry updates less error prone and
easier to comprehend.
With the proposed solution, all geometry updates must be done on the
move/resize geometry first. After that, the new geometry is passed on to
the Client-specific implementation of moveResizeInternal().
To be more specific, the frameGeometry() returns the current frame
geometry, it is primarily useful only to the scene. If you want to move
or resize a window, you need to use moveResizeGeometry() because it
corresponds to the last requested frame geometry.
It is worth noting that the moveResizeGeometry() returns the desired
bounding geometry. The client may commit the xdg_toplevel surface with a
slightly smaller window geometry, for example to enforce a specific
aspect ratio. The client is not allowed to resize beyond the size as
indicated in moveResizeGeometry().
The data flow is very simple: moveResize() updates the move/resize
geometry and calls the client-specific implementation of the
moveResizeInternal() method. Based on whether a configure event is
needed, moveResizeInternal() will update the frameGeometry() either
immediately or after the client commits a new buffer.
Unfortunately, both the compositor and xdg-shell clients try to update
the window geometry. It means that it's possible to have conflicts
between the two. With this change, the compositor's move resize geometry
will be synced only if there are no pending configure events, meaning
that the user doesn't try to resize the window.
We have 2 equivalent code paths for x11 and wayland unnecessarily, unify
them under the same method.
Rename m_clients to m_x11Clients so that it's clear what the difference
is between m_clients and m_allClients.
