Client buffers backed by wl_shm is aggressively released, in which case
we are not allowed to access it. Locking an already released buffer and
later unlocking it will also re-trigger release, confusing clients.
As a quick workaround, guard the unwrap by checking if the buffer is
locked, which will be the case for non-wl_shm buffers.
Passing the wlr_client_buffer directly has a downsides because a
fresh wlr_buffer pointer is passed each output commit instead of
cycling through existing wlr_buffer objects:
- The FDs are re-imported each time in the backend.
- Any import failure is logged every output commit [1].
- The Wayland backend cannot handle import failures without
roundtripping each output commit [2].
Instead, extract the source buffer from the wlr_client_buffer and
pass that to the backend.
[1]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4836
[2]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4841
The event time used for zwp_tablet_pad_group_v2_send_mode_switch was
tv_nsec / 1000, which is microseconds resetting every whole second.
Use get_current_time_msec to get milliseconds including whole seconds.
We support direct scanout when there is an output and buffer
transform so long as the transforms are the same (so cancel out for the
buffer contents). But we still need to apply the output transform to
the destination box location and size.
We've actually been doing the wrong thing this whole time, for v1 of the
protocol, we should set the refresh_nsec field to 0 if the output does
not have a constant refresh rate. However we've been setting it to the
fastest rate instead since eac7c2ad2f
which is incidentally exactly what v2 of the protocol proposes.
So allow advertising v2, and fix v1 to set refresh_nsec to 0.
When setting the primary buffer location for direct scanout, subtract
the offset of that output to put the buffer location in output-relative
coordinates.
Fixes#3910
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).
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.
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
If a surface with an existing buffer has a syncobj surface state created
without committing a new buffer with associated timelines, callers will
see the surface as having a syncobj state and may try to use it, but
calling the signal_release_with_buffer helper at this time will assert
on the lacking release timeline.
As this is a valid situation, remove the assert and replace it with an
early return so that callers do not need to explicitly check for the
presence of valid timelines.
Fixes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3895
A struct wlr_xdg_toplevel_configure is passed in with the whole
state. This makes it a lot clearer that the size and WM state are
always sent to the client.
