Commit b4ce0d8b39 ("render/egl: accept negative DRM FD to select
software rendering") added an EXT_device_drm check to figure out
whether the user selected a device with a DRM FD or without one.
However, for KMS-only devices, Mesa will never advertise the
selected KMS node:
3f1d40d230/src/egl/main/egldevice.c (L109)
Instead, pass down a parameter to indicate whether a DRM FD was
passed in.
Fixes: b4ce0d8b39 ("render/egl: accept negative DRM FD to select software rendering")
Currently if both box_a and box_b are non-empty but do not intersect,
this function does not set dest to an empty box. This contradicts the
doc comments and is surprising for users.
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.
If a surface appears on two outputs with the same intersection
area, or even if a surface appears on an output with a small
intersection area, we want to use the highest scale.
Fixes flip-flop when a surface is added to multiple scenes.
References: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3901
