Enable scene-tree direct scanout of a single buffer with various options
for scaling and source crop. This is intended to support direct scanout
for fullscreen video with/without scaling, letterboxing/pillarboxing
(e.g. 4:3 content on a 16:9 display), and source crop (e.g. when
1920x1088 planes are used for 1920x1080 video).
This works by explicitly specifying the source crop and destination box
for the primary buffer in the output state. DRM atomic and libliftoff
backends will turn this into a crop and scale of the plane (assuming the
hardware supports that). For the Wayland/X11/DRM-legacy backends I just
reject this so scanout will be disabled.
The previous behaviour is preserved if buffer_src_box and buffer_dst_box
are unset: the buffer is displayed at native size at the top-left of the
output with no crop.
The change to `struct wlr_output_state` makes this a binary breaking
change (but this works transparently for scene-tree compositors like
labwc after a recompile).
wlr_multi_backend sorts the states it is given and tries to perform
sequential backend-wide commits for each sub-backend with the states
that belong to it.
It did not manage the index correctly for the next iteration, so given N
states for a backend it would perform N backend-wide commits.
Clarify the logic by calculating a length rather than an end pointer and
update the index after each iteration.
This piece of code checks for multi-GPU renderer support, so it
needs to run after the renderer is initialized.
Fixes: 514c4b4cce01 ("backend: add timeline feature flag")
Closes: https://github.com/swaywm/sway/issues/8382
Since wlr_damage_ring now only works with buffer local coordinates, this
creates an inpedance mismatch for compositors that want to use this
function. Instead of compositors needing to the the conversion itself,
change thu function to take buffer local coordinates directly.
The output feature flag has a flaw: it's not possible to check
whether the backend supports timelines during compositor
initialization when we need to figure out whether we want to enable
the linux-drm-syncobj-v1 protocol.
Introduce a backend-wide feature flag to indicate support for
timelines to address this defect.
Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3904
This wasn't that great:
1. Now that damage ring tracks damage across actual wlr_buffer objects,
it can use the buffer size to do any sort of cropping that needs to
happen.
2. The damage ring size really should be the size of the transformed
size of the output. Compositors currently have to call
`wlr_damage_ring_set_bounds()` where it might not be clear when to
call the function. Compositors can just check against the actual
output bounds that they care about when processing the damage.
Fixes: #3891
Instead of calling xcb_flush() directly, wait until the FD is
writable.
Ideally we'd have a non-blocking variant instead of xcb_flush(),
but libxcb doesn't have this. Also libxcb blocks when its internal
buffer is full, but not much we can do here.
This serves as a bad example: compositors should validate serials from
events instead. Also, the current implementation segfaults if
focused_surface is NULL.
After a connector scan, new connectors might have appeared and old ones
gone away. At this point, old CRTC allocations are already gone, while
new allocations are not yet needed. Skip the call.
This is unreliable because this is first come, first served: the
first capture stream decides whether or not cursors will be
included. Moreover, if the output lacks hw cursor support, cursors
will always be included. But it's the best we're going to get with
automatic wlr_output sources (and has bug parity with
wlr-screencopy-unstable-v1).
Up until now only the DRM backend required an output commit after
updating the cursor. Unify this for all backends, because:
- Screen capture can now catch cursor updates listening for output
commits
- In the future we want to make the cursor a regular wlr_output_layer,
which would need an output commit to be updated anyways
xurui
David Turner
YaoBing Xiao
Kenny Levinsen
Kirill Primak
Simon Ser
Alexander Orezechowski
itycodes
llyyr