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Let userland retain the window backing store while drawing into it.

Browse source 
To start painting, call:
gui$get_window_backing_store()

Then finish up with:
gui$release_window_backing_store()

Process will retain the underlying GraphicsBitmap behind the scenes.
This fixes racing between the WindowServer and GUI clients.

This patch also adds a WSWindowLocker that is exactly what it sounds like.
This commit is contained in:
Andreas Kling 2019-01-24 23:40:12 +01:00
parent ccf3fc4618
commit 86eae0f8df
22 changed files with 244 additions and 102 deletions
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3
WindowServer/WSWindowManager.cpp
View file

@ -220,13 +220,13 @@ void WSWindowManager::remove_window(WSWindow& window)
void WSWindowManager::notify_title_changed(WSWindow& window)
{
printf("[WM] WSWindow{%p} title set to '%s'\n", &window, window.title().characters());
invalidate(outer_window_rect(window.rect()));
}
void WSWindowManager::notify_rect_changed(WSWindow& window, const Rect& old_rect, const Rect& new_rect)
{
printf("[WM] WSWindow %p rect changed (%d,%d %dx%d) -> (%d,%d %dx%d)\n", &window, old_rect.x(), old_rect.y(), old_rect.width(), old_rect.height(), new_rect.x(), new_rect.y(), new_rect.width(), new_rect.height());
ASSERT_INTERRUPTS_ENABLED();
LOCKER(m_lock);
invalidate(outer_window_rect(old_rect));
invalidate(outer_window_rect(new_rect));
}
@ -335,6 +335,7 @@ void WSWindowManager::compose()
m_back_painter->fill_rect(dirty_rect, Color(0, 72, 96));
}
for (auto* window = m_windows_in_order.head(); window; window = window->next()) {
WSWindowLocker locker(*window);
if (!window->backing())
continue;
if (!any_dirty_rect_intersects_window(*window))