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Summary:
KWindowSystem provides a plugin interface to have platform specific
implementations. So far KWin relied on the implementation in
KWayland-integration repository.

This is something I find unsuited, for the following reasons:
 * any test in KWin for functionality set through the plugin would fail
 * it's not clear what's going on where
 * in worst case some code could deadlock
 * KWin shouldn't use KWindowSystem and only a small subset is allowed
to be used

The last point needs some further explanation. KWin internally does not
and cannot use KWindowSystem. KWindowSystem (especially KWindowInfo) is
exposing information which KWin sets. It's more than weird if KWin asks
KWindowSystem for the state of a window it set itself. On X11 it's just
slow, on Wayland it can result in roundtrips to KWin itself which is
dangerous.

But due to using Plasma components we have a few areas where we use
KWindowSystem. E.g. a Plasma::Dialog sets a window type, the slide in
direction, blur and background contrast. This we want to support and
need to support. Other API elements we do not want, like for examples
the available windows. KWin internal windows either have direct access
to KWin or a scripting interface exposed providing (limited) access -
there is just no need to have this in KWindowSystem.

To make it more clear what KWin supports as API of KWindowSystem for
internal windows this change implements a stripped down version of the
kwayland-integration plugin. The main difference is that it does not use
KWayland at all, but a QWindow internal side channel.

To support this EffectWindow provides an accessor for internalWindow and
the three already mentioned effects are adjusted to read from the
internal QWindow and it's dynamic properties.

This change is a first step for a further refactoring. I plan to split
the internal window out of ShellClient into a dedicated class. I think
there are nowadays too many special cases. If it moves out there is the
question whether we really want to use Wayland for the internal windows
or whether this is just historic ballast (after all we used to use
qwayland for that in the beginning).

As the change could introduce regressions I'm targetting 5.16.

Test Plan:
new test case for window type, manual testing using Alt+Tab
for the effects integration. Sliding popups, blur and contrast worked fine.

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D18228

Test Plan: Compiles.

Reviewers: #kwin, broulik

Reviewed By: broulik

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D15712

Summary:
On wayland blur on secondary monitor would not render correctly.

BUG: 393723
Depends on D12452

Test Plan:
 - use more than one output
 - log in in a wayland session
 - open a transparent window (for example: Konsole with transparent and blur enabled profile)
 - drag the window to another screen
 - blurs the content under the window corretly

Reviewers: #kwin, graesslin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: apol, zzag, davidedmundson, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D12678

Summary:
On wayland blur on secondary monitor would not render correctly.

BUG: 393723
Depends on D12452

Test Plan:
 - use more than one output
 - log in in a wayland session
 - open a transparent window (for example: Konsole with transparent and blur enabled profile)
 - drag the window to another screen
 - blurs the content under the window corretly

Reviewers: #kwin, graesslin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: apol, zzag, davidedmundson, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D12678

Summary:
Compiler: GCC 7.3.1
Distro: Arch Linux

Compiler warnings:

```
/home/vlad/KDE/src/kde/workspace/kwin/effects/blur/blur.cpp: In member function ‘void KWin::BlurEffect::upscaleRenderToScreen(KWin::GLVertexBuffer*, int, int, QMatrix4x4, QRect, QPoint)’:
/home/vlad/KDE/src/kde/workspace/kwin/effects/blur/blur.cpp:677:129: warning: unused parameter ‘windowShape’ [-Wunused-parameter]
 void BlurEffect::upscaleRenderToScreen(GLVertexBuffer *vbo, int vboStart, int blurRectCount, QMatrix4x4 screenProjection, QRect windowShape, QPoint windowPosition)
                                                                                                                                 ^~~~~~~~~~~
```

```
/home/vlad/KDE/src/kde/workspace/kwin/main_wayland.cpp: In function ‘void KWin::{anonymous}::gainRealTime(KWin::RealTimeFlags)’:
/home/vlad/KDE/src/kde/workspace/kwin/main_wayland.cpp:95:56: warning: unused parameter ‘flags’ [-Wunused-parameter]
 void gainRealTime(RealTimeFlags flags = RealTimeFlags::DontReset)
```

Reviewers: #kwin, davidedmundson

Reviewed By: davidedmundson

Subscribers: anemeth, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D12208

Summary:
Added the option to turn on noise behind the blurred area.
The lowest strength value disables it completely, so it is optional and is disabled by default.

Test Plan:
Edit: this new screenshot shows the updated noise generation.
Edit2: separated the screenshots so you can flick through them to clearly see the differences

{F5694024}

{F5694031}

{F5694025}

{F5694028}

Reviewers: #kwin, #vdg, fredrik

Reviewed By: #vdg, fredrik

Subscribers: davidedmundson, matheusm, romangg, ivan, zzag, ngraham, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D10281

Summary:
Since the new blur is more efficient "fastblur" or "simpleblur" is not needed anymore for fullscreen blur.
Even my old low-end laptop from 2009 (with Intel T3300) can easily do fullscreen blur now with the new method without any hitch at all.

Reviewers: graesslin, #kwin, #plasma, #vdg, fredrik

Reviewed By: #vdg, fredrik

Subscribers: avaragic, fredrik, ngraham, plasma-devel, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D10181

Summary: In D9848 the file permissions in effects/blur where accidentally changed from 644 to 755.

Test Plan: {F5674656}

Reviewers: #kwin, hein

Reviewed By: hein

Subscribers: kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D10100

Summary:
Updated the old and outdated blur method to use the much more efficient dual kawase blur method.
Now with this we can do virtually infinite blur with very very little performance cost.
The dual kawase blur method is basically downscaling and upscaling an image, but combined with the kawase blur shader.
Comparison: https://i.imgur.com/mh6Cw61.png
Left is old, right is new.
Comparison was done with the strongest blur setting in a VM running on an Intel i7-4790 and a GTX980
We can see here that the performance is even better with this new method.

Reviewers: #plasma, #kwin, graesslin, fredrik

Reviewed By: fredrik

Subscribers: hein, dos, luebking, broulik, romangg, zzag, anthonyfieroni, mart, davidedmundson, fredrik, ngraham, plasma-devel, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D9848

Summary:
Instead of calling reconfigure() on screen size changes, which deletes
and recreates the effect, we can just update the one texture that's mapped to
the screen size.

---

From the wayland commit.

>What surprises me is that BlurManager recreates for Output changes.
>That sounds like a bug in KWin (or an area which could be improved).

I had thought the same and wrote this (though wanted to have kwayland fixed first)

Test Plan:
Logged in and out (my screen resizes on startup due to scaling)
Tested on my X machine by turning a screen off. Nothing broke, plasma
panels looked the same.

Note: Eike tried this patch last week and claimed kwin still crashed.
We don't have a backtrace so it could have been something unrelated,
applied wrong or that he was deliberately lying to wind me up.

Reviewers: #plasma, graesslin

Reviewed By: #plasma, graesslin

Subscribers: graesslin, plasma-devel, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D7877

If a window is fullscreen and wants fullscreen blur behind it, we
use the blur from logout effect. This is mostly intended for the
Application Dashboard which requires a fullscreen blur. The generic
blur effect is not designed for such usage and is rather costly.

This simplified blur just needs framebuffer blit and midmaps. This
makes it rather cheap in usage and also doesn't need a cached texture.

REVIEW: 126906

The blur effect so far calculated a custom model view projection matrix.
This is not needed as we have the current projection matrix available in
WindowPaintData and EffectFrame.

REVIEW: 126215

Following the approach how it's done for X11: only create the interface
if the shader succeeded to compile and remove support again if it failed
to compile after a reconfigure.

REVIEW: 125444

use the new blur protocol to fetch information about the
region of blur behind to apply to windows like Plasma::Dialog
REVIEW:125017

This method replaces the X-KDE-ORDERING property in the Effect's desktop
files. This change is a preparation step for integrating the new Effect
Loader which doesn't read the ordering information. Thus it needs to be
provided by the Effect itself so that the EffectsHandler can properly
insert it into the chain.

Also for the built-in Effects on the long run it doesn't make much sense
to install the desktop files. And binary plugin effects will migrate to
json metadata which also doesn't have the KService::Ptr. Thus overall it
simplifies to read this information directly from the Effect.

Reviewed-by: Philipp Knechtges <philipp-dev@knechtges.com>

Use the new GLVertexBuffer::map() interface.
Reviewed-by: Philipp Knechtges <philipp-dev@knechtges.com>

In effects it's obvious that compositing is enabled, so specifying the
translucent element is no problem.

In tabbox a context property "compositing" is injected which decides
whether "translucent" or "opaque" elements should be used. Here the
translucent elements are only used if the Blur effect is available - for
this a new Effect::Feature Blur is introduced and in addition it is
tested whether the theme provides the translucent element.

Also the masking is adjusted to ensure that only the shadow is not
blurred.

Reason for this change is that Plasma theme seems not always to pick up
whether compositing is used when used from inside KWin. It does not cover
the Desktop Change OSD which uses PlasmaCore.Dialog and there we cannot
(yet) inject that we use compositing.

Overall I'm quite unhappy with this patch and I do hope we can fix it in
the proper place in the lifetime of 4.10 and revert this patch.

CCBUG: 311995
REVIEW: 108438

The supportInformation is extended to also read the properties
on all effects. In addition each effect can be queried just for
itself through D-Bus, e.g.:
qdbus org.kde.kwin /KWin supportInformationForEffect kwin4_effect_blur

All effects are extended to provide their configured and read
settings through properties. In some cases also important
runtime information is exposed.

REVIEW: 105977
BUG: 305338
FIXED-IN: 4.9.1

Required to get scripting bindings working.

This patch adds a new function Toplevel::addLayerRepaint, that in contrast
to addWorkspaceRepaint does not invalidate every blur texture cache that
overlaps with that region. As the name suggests it rather invalidates the
to the window associated layer at that position. This is especially useful
in the case of move/resize events in combination with oxygen-transparent,
where the altered window is almost always the topmost window and the blur
texture cache of the windows underneath are unchanged.

For the case of fully opaque windows the behaviour of addLayerRepaint
and addWorkspaceRepaint should be same.

REVIEW: 103906

This possibly fails on some (older?) ati chip/driver combos
-> Waiting for bugreports

REVIEW: 103246

This fixes graphical glitches that appear next to the borders of plasma
tooltips. Additionally I added a variable that forces the effect to
drop the cache, which might be useful in the future to fix bugs.

This patch introduces some kind of damage propagation. In the old version of the blur effect
we had to repaint the whole window if sth behind the blurred area was damaged. The new texture
cache, which was introduced by the last patch, gives us the opportunity to only update parts of
blurred background texture. This means that the damaged area can only propagate with the speed
of the blurring radius per window layer.

REVIEW: 102665

This patch adds an optional texture cache to the blur effect such that damaged windows in
front of the blurred region dont trigger a repaint of the whole blurred region which pretty
often results in a avalanche repaint of nearly the whole screen.

REVIEW: 101977

This patch adds the capability to draw blurred region top to bottom using
paintSimpleScreen.

REVIEW: 101898

Move the tests into a separate function to improve readability.

Optimize the region of the screen that's painted in each frame,
and paint the windows top-to-bottom when the damaged region doesn't
intersect any blurred areas.

All previously existing windowAdded methods are renamed to slotWindowAdded.
EffectsHandlerImpl is connected to Workspace's clientAdded signal, which is
emitted a little bit earlier than the previous direct method call. This might
change behavior.
Another signal is added to Workspace to signal that an unmanaged is added.

BUG: 241389
FIXED-IN: 4.6.0

svn path=/trunk/KDE/kdebase/workspace/; revision=1154132

svn path=/trunk/KDE/kdebase/workspace/; revision=1102771

svn path=/trunk/KDE/kdebase/workspace/; revision=1102515

svn path=/trunk/KDE/kdebase/workspace/; revision=1101728

Applications can use this hint to specify the region under the
the window where the blur effect will be applied.

svn path=/trunk/KDE/kdebase/workspace/; revision=1100036

svn path=/trunk/KDE/kdebase/workspace/; revision=1099619