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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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14
LibGUI/GWidget.cpp
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@@ -18,12 +18,13 @@ GWidget::~GWidget()
{
}
void GWidget::set_relative_rect(const Rect& rect, bool should_update)
void GWidget::set_relative_rect(const Rect& rect)
{
if (rect == m_relative_rect)
return;
// FIXME: Make some kind of event loop driven ResizeEvent?
m_relative_rect = rect;
if (should_update)
update();
update();
}
void GWidget::repaint(const Rect& rect)
@@ -147,10 +148,3 @@ void GWidget::set_font(RetainPtr<Font>&& font)
else
m_font = move(font);
}
GraphicsBitmap* GWidget::backing()
{
if (auto* w = window())
return w->backing();
return nullptr;
}