If there were already a shadow, the quads are rebuild, but not if
we created a new shadow. This is not a problem if the shadow exists
before the quads are built for the first time (e.g. when managing
the window), but if the shadow is created later on the quads are
incorrect and the shadow doesn't get rendered at all. This happens
for example with Aurorae based decoration themes, where the creation
of the first shadow is delayed into the next event cycle.
The DecorationShadow on XRender is implemented by creating the
required QPixmaps in ::prepareBackend. That way the rendering
infrastructure can be shared with the window based shadows.
BUG: 342758
REVIEW: 122009
Surprisingly the DecorationShadow is modelled after the Shadow in KWin.
It provides the same offsets and a QImage exactly like the OpenGL
implementation needs it. This makes it easy to hook it into our existing
Shadow implementation with only a few changes.
Shadow now first tries to create a Shadow from the Decoration and only
if that fails it tries the X11 property. The pixmaps are not initialized
for the DecorationShadow and because of that currently only the OpenGL
backend gets initialized for DecorationShadows. The other backends might
need adjustments and also a transition to just using one image.
The Xcb::Property can wrap the xcb_get_property call and provides
convenient access methods to read the value of the reply with checks
applied. For this it provides a templated ::value method for reading a
single value or reading an array. There's also a ::toBool and
::toByteArray which performs the conversion directly with default values
for the type and format checks.
Xcb::TransientFor is changed to be derived from Property instead of
Wrapper directly, so that the reading of the property value can be
shared.
Xcb::StringProperty is a convenient wrapper derived from Property to
handle the reading of a string property providing a cast to QByteArray
operator. This replaces the ::getStringProperty from utils. Though the
separator functionality from ::getStringProperty is not provided as that
is only used in one function and handled there.
All the custom usages of xcb_get_property or getStringProperty are
replaced to use this new wrapper. That simplifies the code and ensures
that all properties are read in the same way.
REVIEW: 117574
Instead of having the Shadow factory method check the compositor type and
do the decision which Shadow sub class to create, a pure virtual method in
Scene is called which returns the specific Shadow sub class instance.
Main problem here was that it still used fromX11Pixmap. It's changed to
XCB and gets the image data with xcb_get_image, constructs a QImage from
retrieved data and copies it to QPixmap. That's performing a deep copy
which we want (and also had in the old code).
The CompositingType enum turns into flags and two new values are
introduced: OpenGL1Compositing and OpenGL2Compositing.
Those new values are or-ed to OpenGLCompositing so that a simple check
for the flag OpenGLCompositing works in case of one of those two new
values. To make the generic check for OpenGL compositing easier a method
in EffectsHandler is introduced to just check for this.
The scenes now return either OpenGL1Compositing or OpenGL2Compositing
depending on which Scene implementation. None returns OpenGLCompositing.
The Oxygen deco uses this to remove built-in shadows from decorated windows when adding (legacy...) decoration shadows
CCBUG: 291774
REVIEW: 103751
(cherry picked from commit a97bdc64fa2a676f99738abd371a99126fb8e93d)
Due to changes in build system we have always either OpenGL or OpenGL ES.
This allows to remove the KWIN_HAVE_OPENGL_COMPOSITING define. In the
effects the define is kept as KWIN_HAVE_OPENGL which can be used in
future to build also an XRender only effect system.
Copies the shadow parts into one image and creates a GLTexture
from the image, so that we can render the complete shadow with
just one texture and one painting pass.
Should remove most of the overhead involved when rendering the new Shadows.
As a side effect this should fix missing shadows with non-NPOT GPUs and
a rendering glitch reported with NVIDIA.
REVIEW: 101742
The deep copy does not work with raster as it creates a non-native
pixmap. In fact the deep copy is not needed any more as it was a
safety check during development when apps using raster could crash
kwin.
In order to notice when the geometry changes a new signal is
added to toplevel and both Unmanaged and Client connect all their
signals which are emitted whenever the geometry changes in some way
to this new signal.
Shadow connects to the signal and updates the quads and region
whenever the size changes.
The Shadow is clearly an aspect of the compositor. Therefore the
Shadow has to be owned and controlled by the Scene::Window.
Nevertheless Toplevel needs to know about the Shadow cause of reading
the property.
Unmanaged needs to repaint the complete geometry including shadow
when it ends compositing. Therefore we need to track the shadow
passing to deleted correctly. Disadvantage: when turning off
compositing the shadow is kept. Need to solve in a better way!
For a complete documentation of new functionality refer to:
http://community.kde.org/KWin/Shadow
The current implementation includes a new Shadow class and Toplevel
holds a pointer to an instance of this class. The Shadow class reads
the data from the X11 Property. There is one extended class located
in SceneOpenGL to render the shadow.
Compositor is adjusted to include the shadow region into the painting
passes.
Implementation for XRender still missing and Shadow needs to respond
to size changes of the Toplevel to update cached shadow region and
WindowQuads.
