https://bugs.freedesktop.org/show_bug.cgi?id=104389
Bug ID: 104389
Summary: Output transforms 90 and 270 are inverted
Product: Wayland
Version: unspecified
Hardware: Other
OS: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: weston
Assignee: wayland-bugs@lists.freedesktop.org
Reporter: cont...@emersion.fr
The spec [1] says that wl_output::transform's rotation is counter-clockwise.
However, configuring an output with a 90 degree rotation results in a clockwise
rotation. The output rotation reported by weston-info is 90.
90 and 270 degree rotations are swapped. Their flipped variants are swapped
too.
This isn't a big issue inside weston because weston apps (like weston-terminal)
will behave correctly: they'll rotate their surfaces of 90 degrees clockwise
and advertize via wl_surface::set_buffer_transform a 90 degree rotation.
This is more of an issue with other compositors. If another compositor wants to
follow the spec, weston apps won't work correctly in this compositor.
[1]
https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_output-enum-transform
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