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

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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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4
LibGUI/GWidget.h
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@ -51,7 +51,7 @@ public:
virtual const char* class_name() const override { return "GWidget"; }
void set_relative_rect(const Rect&, bool should_update = true);
void set_relative_rect(const Rect&);
Color background_color() const { return m_background_color; }
Color foreground_color() const { return m_foreground_color; }
@ -84,8 +84,6 @@ public:
const Font& font() const { return *m_font; }
void set_font(RetainPtr<Font>&&);
GraphicsBitmap* backing();
private:
GWindow* m_window { nullptr };