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view: Update child view transforms from parent 

weston_view_geometry_dirty() marks the passed-in view as dirty, as well
as all of its children.

weston_view_update_transform() updates the geometry of its ancestors,
then itself.

Users are required (for now) to call weston_view_update_transform() in
order to not experience a disappointing amount of death-by-assert.

Users do not have a pointer to child views which are magically
materialised by the subsurface code.

The end result is disappointing. But it is less disappointing if
updating the transform for a view the user is actually aware exists,
also updates the transform for all its children.

Signed-off-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Daniel Stone 2023-06-27 15:13:39 +01:00
parent 0ff72e5374
commit 49b5df7f78
1 changed files with 6 additions and 0 deletions
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6
libweston/compositor.c
View File

@ -1494,6 +1494,7 @@ WL_EXPORT void
weston_view_update_transform(struct weston_view *view)
{
struct weston_view *parent = view->geometry.parent;
struct weston_view *child;
struct weston_layer *layer;
pixman_region32_t mask;
@ -1539,6 +1540,11 @@ weston_view_update_transform(struct weston_view *view)
wl_signal_emit(&view->surface->compositor->transform_signal,
view->surface);
wl_list_for_each(child, &view->geometry.child_list,
geometry.parent_link) {
weston_view_update_transform(child);
}
}
WL_EXPORT void