When importing a dmabuf to a new EGLImage, add the option to apply
color-representation metadata to specify the color encoding and range.
To get this information from the wlr_surface to the new EGLImage, I
store it in wlr_dmabuf_v1_buffer. This seems reasonable because we can
currently only apply color representation to dmabufs anyway.
Note that this currently won't update if color-representation is changed
on a surface which has already been rendered (so already has an
EGLImage). It only works when color-representation is set before the
first render. To fix this I think we'll need some mechanism to
re-import the dmabuf if color-repr is changed.
Add color_representation to wlr_output_state, holding color
representation metadata about the primary buffer. This can be set or
cleared using wlr_output_state_set_primary_color_representation() and a
new enum value WLR_OUTPUT_STATE_COLOR_REPRESENTATION in
wlr_output_state.committed indicates when this data is present.
Color transforms are better suited than raw gamma tables, because:
- They don't need to get copied around: they are ref'counted.
- They can represent more color operations (will be useful for the
upcoming KMS color pipeline API, and for the Wayland color
management protocol).
Converting the LCMS2 transform to a 3D LUT early causes issues:
- It's a lossy process, the consumer will not be able to pick a
3D LUT size on their own.
- It requires unnecessary conversions and allocations: an intermediate
3D LUT is allocated, but the renderer already allocates one.
- It makes it harder to support arbitrary color transforms in the
renderer, because each type needs to be handled differently.
Instead, expose a function to evaluate a color transform, and use
that to build the 3D LUT in the renderer.
If a surface is mirrored on two outputs, we don't want to pick the
first output if the second has a higher refresh rate.
Also fixes duplicate frame/feedback events when a surface is added
to multiple scenes.
This lets the surface handler decide which output to send frame
callbacks from. The output_sample event already works this way.
Introduce wlr_scene_surface_send_frame_done() as a replacement for
wlr_scene_buffer_send_frame_done() when a compositor doesn't have
an output at hand.
Follow-up from !4803. Make things consistent by making all `struct
timespec`s in events owned. Reduces the need for thinking about
ownership/lifetimes.
The spec says [1]:
> If set, the Window Manager should use this in preference to WM_NAME.
However we overwrite WM_NAME with NULL when _NET_WM_NAME is unset.
Fix this by storing both WM_NAME and _NET_WM_NAME, so that we
handle properly all combinations of events (e.g. a client setting
both and later clearing one).
[1]: https://specifications.freedesktop.org/wm-spec/1.3/ar01s05.html#id-1.6.2
