Summary:
The feature has always been considered experimental. Unfortunately it is
completely unmaintained and hasn't seen any commits in years. It
requires kolor-manager to function, but that has not seen a release
based on frameworks yet. This makes it difficult to maintain. In fact I
have never been able from the introduction till now to setup a color
corrected system. One needs kolor-manager and oyranos and especially the
latter is hardly available on any linux distribution (e.g. not on the
Debian/Ubuntu systems).
Due to being unmaintained color correction in KWin did not keep up with
recent changes. Neither did it see any updates during the xlib->xcb
port, nor during the Wayland port. Especially the Wayland port with the
rendering changes make it unlikely to function correctly. E.g. Wayland
introduced a proper per-screen rendering, while color correction did a
"fake" per screen rendering. How that is going to work in combination is
something nobody ever tried. Now after the introduction of proper
per-screen rendering the solution would be to port color correction to
the new api, but that never happened.
Color correction also modified the shaders, but a newer shader API got
introduced some time ago. Whether the color correction shader support
that or not, is unknown to me. Also which shader language versions are
supported. I know it was based on 3d texture support, which back on
introduction was partially lacking in OpenGL ES. Nowadays that changed,
but color correction didn't update.
Last but not least it is completely X11 based and there is no work on
how to make it work with Wayland.
Given all the problems, especially the fact that it is unmaintained and
cannot be setup on my system, means to me that the only solution is to
remove it.
I'm open to having it reintroduced in future, but only if the
availability on Linux distributions gets addressed before. As long as
major linux distributions do not ship this feature, it should not be in
KWin. Given that I must say that it was a mistake to add it in the first
place and I need to point out that I was against the merge back then.
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D3402
Summary:
When the decoration size changes the textures get recreated and need to
be properly filled. So far KWin used the scheduled repaint geometry in
this situation. If the decoration didn't schedule the complete geometry
for repain there will be an empty area in the decoration texture.
This change ensures that the complete texture gets repainted when they
are recreated. Thus the decoration rendering is more fault tolerant
towards potential bugs in the decoration. With no-compositing and XRender
compositing this problem was not reproducable and already fault tolerant,
so OpenGL just catches up with the other modes.
BUG: 371735
FIXED-IN: 5.8.3
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D3186
Summary:
The shader self test uses GLRenderTarget and restores the viewport. Due
to the setVirtualScreenGeometry not being set the calculated viewport is
incorrect and any rendering breaks. This is a regression introduced with
1708278a45 which only affects Wayland
backends which do not perform per screen rendering.
The glxbackend was not affected as it sets the viewport on screen
geometry change.
Reviewers: bshah, #plasma_on_wayland, #kwin
Reviewed By: bshah, #plasma_on_wayland, #kwin
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3155
Summary:
On Wayland per output rendering is performed and paintScreen is invoked
for every output. Some effects need the information which output is
currently being rendered as otherwise e.g. FBO access could fail.
This change adds the current output geometry to ScreenPaintData. On X11
(all outputs one geometry) this information is not set and a null rect
is returned. That way the effects can also easily check which rendering
mode is used.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3058
Summary:
This is similar to ff6e042c7f just for
GLRenderTarget instead of GLVertexBuffer. The reasoning is the same: on
Wayland KWin has one native window per screen and needs to adjust the
blit target depending on the area.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3056
Summary:
On Wayland in multi-screen a "window" is used to render to per screen.
In OpenGL every "window" is at 0/0 and scissoring is in respect to the
window geometry. The rendering geometry passed to VBO rendering, which
performs the scissoring, is in virtual combined screen geometry space.
Thus the scissoring always removes any rendering on the second screen.
This results in e.g. wobbly windows not working on any additional screen
on Wayland.
This change makes the VBO rendering multi-screen aware by passing the
current virtual window geometry in each rendering pass. That replaces
the so far used virtual screen size. For single screen rendering or
multi-screen rendering on X11 this doesn't change anything as there is
always only one OpenGL window and the screen geoemetry starts at 0/0.
Thus the subtracting of x/y geometry do not affect the scissoring at
all.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2955
Summary:
If a buffer gets destroyed the texture created from it is still valid.
In such a situation the OpenGLWindowPixmap should return true for isValid
and not false as it did. Similar in QPainter compositor the pixmap is
valid if there is an image copied from the buffer.
This change ensures that for example minimizing an XWayland window
still has a texture during the minimize animation.
BUG: 368440
Test Plan:
Minimize animation plays for X windows and minimized windows
are shown in present windows.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D2724
Summary:
A new method to tell the effects system whether the compositor scene
is able to drive animations. E.g. on software emulation (llvmpipe) it's
better to not do any animations at all.
This information can be used by effects to adjust their behavior, e.g.
PresentWindows could skip transitions or effects can use it in their
supported check to completely disable themselves.
As a first step all scripted effects are considered to be unsupported
if animations are not supported. They inherit AnimationEffect and are
all about driving animations.
The information whether animations are supported comes from the Scene.
It's implemented in the following way:
* XRender: animations are always supported
* QPainter: animations are never supported
* OpenGL: animations are supported, except for software emulation
In addition - for easier testing - there is a new env variable
KWIN_EFFECTS_FORCE_ANIMATIONS to overwrite the selection.
Reviewers: #kwin, #plasma
Subscribers: kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D2386
windowPixmap() is allowed to return a nullptr, thus we need to verify
that the returned pointer is not null. If it is null it's the same as
if there are no child WindowPixmaps.
Summary:
This change addresses the problem of the incorrectly rendered shadows
when opening a window (e.g. Kickoff) a second time. In case of e.g.
Kickoff not all elements are set, thus e.g. left might be 0, but right
has a value. So for calculating the height the maximum of the values
must be used.
Test Plan: Opened Kickoff and systray a few times
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D1792
Summary:
The problem of the badly rendered shadows in case of opening kickoff
twice on Wayland is related to this. In that situation both the
width and height are 0. The rendering to the image fails and creating
the texture fails. This causes the flickering we see during rendering.
This change now discards such a shadow with an invalid size. This is
not fixing the actual problem of the shadow, but rather the symptom.
Nevertheless it's an important change as it makes it at least not
look fully broken.
Reviewers: #kwin, #plasma_on_wayland
Differential Revision: https://phabricator.kde.org/D1790
Summary:
It's only needed by the standalone x11 variant. This allows us to
simplify the creation of the OpenGLBackend: it's created by the
platform plugin - we don't need custom complex logic.
Reviewers: #plasma
Subscribers: plasma-devel
Projects: #plasma
Differential Revision: https://phabricator.kde.org/D1392
Summary:
If a window has an invalid size the decoration also has an invalid
size. This results in the texture used by the
SceneOpenGLDecorationRenderer to be invalid and being reset to null.
Of course we shouldn't try to use this texture to render to.
The change comes with a test case to simulate the situation. We cannot
simulate it with Wayland clients as the geometry can never be empty.
Thus we create an X11 client, resize it to an empty size and unmap it.
This is the first integration test case which creates an X11 Client!
It's also a test case which needs the OpenGL compositor. This will most
likely not work on build.kde.org yet - we need to see what to do about
it. Will need adjustments to get it at least skip on build.kde.org.
BUG: 361551
FIXED-IN: 5.6.3
Reviewers: #plasma
Subscribers: plasma-devel
Projects: #plasma
Differential Revision: https://phabricator.kde.org/D1383
Summary:
It can be null even after updateTextTexture() if there is not text
to generate the texture from:
if (m_effectFrame->text().isEmpty())
return;
Reviewers: graesslin
Reviewed By: graesslin
Subscribers: plasma-devel
Projects: #plasma
Differential Revision: https://phabricator.kde.org/D1347
This is more a hack than an actual implementation. It just renders
all sub-surfaces after the main window got rendered. But it does not:
* use window quads (e.g. splitting not supported)
* is not combined with rendering of the main surface
* does not support previous pixmap
Still it renders, which is the main goal at the moment.
the shadow can be deleted deferred from an update
there's a slight chance, to be eg. triggered by clients
blocking compositing, that the compositor is suspended in the same
cycle and the effects pointer (and scene and context) thus gone
CCBUG: 356938
FIXED-IN: 5.6
REVIEW: 126441
With this change a new ctor overload is added to ScreenPaintData
which allows passing a projection matrix through the effects. This
allows effects to put up custom shaders with a shared projection matrix
and without having to calculate it themselves.
The projection matrix is a read-only information for the effects. There
is no way to change or overwrite it.
For both simple and generic rendering the projection is actually the
same. So let's create it at the start of the frame rendering which
allows us to also pass it through the effects.
All backends already have an init method so far called from the ctor.
This change moves the call to init out of the OpenGL backends and makes
it the responsibility of the creating code to also call init on the
backend.
This change makes it easier to have virtual methods being called during
the initialization.
The last stage for window rendering is triggered by
Scene::finalDrawWindow. Adding a security check there if screen is locked
no non-lock screen window should be rendered.
Unfortunately this method is virtual so the check needs to be done in the
base and all implementing child methods (currently only OpenGL).
REVIEW: 126144
There are slight differences between GL_ARB_debug_output and GL_KHR_debug
affecting how it works on GLES. With GL_KHR_debug the context should be
created with a debug flag. With the ARB extension there is no such
requirement. Empirical data (Mali) shows that it doesn't work if the
context is not created with the flag, although the spec seems to allows
it.
So:
* if we have GL_ARB_debug_output we assume it works
* if we only have GL_KHR_debug we check whether the context is created
with debug support (which we don't do yet, but maybe should?)
* on GLES we can only query with version 3.2 (which we don't request yet)
* with anything older we just assume it's not enabled (which is correct
given that we don't enable the debug flag)
REVIEW: 126053
For the functions from GL_FOO_robustness we want to resolve it by
ourselves in order to add a custom implementation if it's not available.
Unfortunately once epoxy.h is included this breaks as epoxy defines the
names and so through the preprocessor epoxy always wins.
So we need different names: all functions from robustness get a "kwin"
prefix and the usage is changed everywhere in kwin source code.
REVIEW: 125883
-use qstringliteral only when necessary (i.e. not in concat or comparison)
-use qbytearray instead of qstring when dealing with latin1 input and output (glplatform)
-use qstringref to extract numbers from strings (glplatform)
-define qt_use_qstringbuilder to optimize all string concatenations
-anidata: use ctor init lists, add windowType member initialization
REVIEW: 125933
Compile failure on KDE CI:
error: ‘GL_GUILTY_CONTEXT_RESET’ was not declared in this scope
It's not defined in libepoxy 1.2, so let's define it to the values
it has in 1.3.
So far it was bound to whether we build for GLES. But this is
semantically wrong. It might be possible that even on desktop gl
epoxy is built without GLX support, thus we need to reflect this.
This change ensures that epoxy/glx.h is only included if available,
that relevant code is bound to it and that checks are in place to
enforce EGL if not build with glx support.
In addtion the glxbackend.cpp is now only included in the build set
if available.
For a virtual rendering backend a surfaceless context is needed. Such
a context may not call glDrawBuffer as that results in a GL error.
This change allows the OpenGLBackend to announce that it's context is
surfaceless.
It doesn't make much sense any more as we do no longer link EGL since the
switch to epoxy. And epoxy pulls it in at runtime if needed.
Even more on Wayland it's just plain stupid to have EGL disabled. So
removing the option just simplifies our code base without any
disadvantages.
REVIEW: 124695
