Start refactoring graphics system to have per-window backing stores.

It was fun for everyone to share a single framebuffer but it was also
kinda really awful. Let's move towards having a "GraphicsBitmap" as the
backing store for each Window.

This is going to need a lot of refactoring so let's get started.

1 files changed, 4 insertions, 2 deletions

diff --git a/Widgets/Widget.h b/Widgets/Widget.h
index 132baa595c..90dd8850a2 100644
--- a/Widgets/Widget.h
+++ b/Widgets/Widget.h
@@ -6,8 +6,8 @@
 #include "Color.h"
 #include "Font.h"
 #include <AK/AKString.h>
-#include <functional>
 
+class GraphicsBitmap;
 class Window;
 
 class Widget : public Object {
@@ -15,7 +15,7 @@ public:
     explicit Widget(Widget* parent = nullptr);
     virtual ~Widget();
 
-    virtual void event(Event&);
+    virtual void event(Event&) override;
     virtual void paintEvent(PaintEvent&);
     virtual void showEvent(ShowEvent&);
     virtual void hideEvent(HideEvent&);
@@ -83,6 +83,8 @@ public:
     const Font& font() const { return *m_font; }
     void setFont(RetainPtr<Font>&&);
 
+    virtual GraphicsBitmap* backing();
+
 private:
     Window* m_window { nullptr };