Resizing a window in Wayland caused cursor motion events in the window
which could be seen as buttons flashing when the cursor was detected
as hovering over buttons.
This was caused by two bugs:
- Missing checks for failure to access the cursor location before
converting the coordinates from GHOST to screen-space meant the
wmWindow::eventstate location would move each time the location
was updated.
- Resizing the window wasn't detecting state changes and would
continuously send window activation events. Window activation set
wmWindpw::addmousemove which triggered the previous bug, making the
cursor flicker during resize.
This commit only addresses the first issue, where failure to access
the cursor location wasn't accounted for
(window activation will be fixed separately).
All GHOST_GetCursorPosition & wm_cursor_position_get calls now account
for failure, resolving uninitialized stack memory use in some cases.
This resolves similar issues for macOS, WIN32 & X11 although it seems
likely these platforms rarely fail to access the cursor location.
It's possible for there to be no outputs under Wayland
(when unplugging monitors for e.g.) so this must be accounted for.
Also avoid calculating the window position when the GHOST backend
doesn't support window positions (which is the case for Wayland).
Add checks for the SDL backend too, where accessing the
screen & desktop size may fail.
Listing the "Blender Foundation" as copyright holder implied the Blender
Foundation holds copyright to files which may include work from many
developers.
While keeping copyright on headers makes sense for isolated libraries,
Blender's own code may be refactored or moved between files in a way
that makes the per file copyright holders less meaningful.
Copyright references to the "Blender Foundation" have been replaced with
"Blender Authors", with the exception of `./extern/` since these this
contains libraries which are more isolated, any changed to license
headers there can be handled on a case-by-case basis.
Some directories in `./intern/` have also been excluded:
- `./intern/cycles/` it's own `AUTHORS` file is planned.
- `./intern/opensubdiv/`.
An "AUTHORS" file has been added, using the chromium projects authors
file as a template.
Design task: #110784
Ref !110783.
