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WindowServer+LibGUI: Mark window bitmaps volatile in occluded windows

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WindowServer now tracks whether windows are occluded (meaning that
they are completely covered by one or more opaque windows sitting above
them.) This state is communicated to the windows via WindowStateChanged
messages, which then allow GWindow to mark its backing store volatile.

This reduces the effective memory impact of windows that are not at all
visible to the user. Very cool. :^)
This commit is contained in:
Andreas Kling
2019-12-27 11:34:40 +01:00
parent 5d1acdda82
commit c7847d7c81
9 changed files with 72 additions and 10 deletions
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2
Libraries/LibGUI/GWindowServerConnection.cpp
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@@ -299,5 +299,5 @@ void GWindowServerConnection::handle(const WindowClient::DragCancelled&)
void GWindowServerConnection::handle(const WindowClient::WindowStateChanged& message)
{
if (auto* window = GWindow::from_window_id(message.window_id()))
window->notify_state_changed({}, message.minimized());
window->notify_state_changed({}, message.minimized(), message.occluded());
}