This is done by converting from the sRGB + gamma 2.2 input from clients
to linear with the color space of the output (BT.709 or BT2020 atm) in
a shadow buffer, and then convert from the shadow buffer to the transfer
function the output needs (sRGB or PQ).
With the dmabuf multi-gpu path, a buffer is imported to the secondary GPU
and presented directly, but importing a buffer that's usable for scanout
is not possible that way on most hardware. To prevent CPU copy from being
needed in those cases, this commit introduces a fallback where the buffer
is imported for rendering only, and then copied to a local buffer that's
presented on the screen.
CCBUG: 452219
CCBUG: 465809
When showing the window RHI will realise the window has no underlying
platform window and create a temporary offscreen surface, different from
the offscreen surface we'll eventually be rendering into. This will use
the format of the main window.
If this offscreen surface format does not match the format of the
context we can fail in makeCurrent calls.
Apparently CMAKE_AUTOMOC_MACRO_NAMES modifications are not visible in
sibling directories. To work around that, populate
CMAKE_AUTOMOC_MACRO_NAMES with libkwineffects plugin macros in the
top level CMakeLists.txt file.
Tabbox supports two operation modes: switching between windows and
desktops. Switching between windows is more commonly used. Desktop
switching is not exposed in user settings and it requires some advanced
knowledge of kwin's internals to enable it.
On the other hand, over the past years, we've double downed on effects
like desktop grid and overview to provide graphical means to switch
between virtual desktops.
This change drops desktop switching because it's effectively unused to
simplify the tabbox code, which can be very handy for the future
refactorings of window switching.
Currently Deleted are destroyed with a delay to avoid dangling pointers
within the middle of painting.
On the other hand, it's reasonable to require not to delete windows when
kwin starts painting the screen.
Over the years, we refactored how deleted windows. They are always
unreferenced after finishing the current frame. So it should be fine to
destroy Deleted immediately now.
kwineffects.h is included in many files and not everyone needs the
RenderTarget and RenderViewport, so forward declare them to reduce the
amount of parsing work for the compiler.
The only purpose ScreenPaintData had was to pass around a copy of the viewport
projection matrix and the effectscreen, which can be handled in a simpler
way separately.
Instead of calling effects->renderTargetRect() and effects->renderTargetScale(),
pass the actually used render target and viewport in all the necessary methods.
This ensures that if an effect renders a screen with a modified scale or
projection matrix, the modified values get used instead of the "global" ones
Qt would need to allocate fewer "tainted" data objects, and using the
same engine both in effects and in kwin is vital for features such as
QML based effects.
The dummy window hack was needed to ensure hidpi rendering on Wayland.
We introduced QQuickRenderTarget::setDevicePixelRatio() in Qt 6.3, so
the hack can be removed now.
Commit 88cf8355 changed the behaviour of Mali (Lima) / PinePhone devices by disabling GLSL
88cf8355 got backported in 5.27.1 and broke PinePhone devices (White rectangle on topright quarter of a black screen)
This patch restores the behaviour of 5.27.0
This signal exists as a convenience helper, but it's not always emitted
as it's advertised to work. Instead of fixing it, let's drop the signal
to simplify virtual desktop code. Its effects can be accomplished by
monitoring Window::desktopChanged() and VirtualDesktopManager::currentChanged()
signals in effects and scripts where needed.
