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LibGUI: Add a WindowBackingStore class

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Instead of storing the back/front buffers of a GUI::Window as just
Gfx::Bitmap, wrap them in a WindowBackingStore class.

This will allow us to add more information alongside the bitmaps while
keeping the back/front swapping logic simple.
This commit is contained in:
Andreas Kling 2021-01-15 09:38:12 +01:00
parent 7e71de8f1f
commit 96f8fcdcba
2 changed files with 71 additions and 44 deletions
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14
Userland/Libraries/LibGUI/Window.h
View file

@ -40,6 +40,8 @@
namespace GUI {
class WindowBackingStore;
class Window : public Core::Object {
C_OBJECT(Window)
public:
@ -157,8 +159,7 @@ public:
const Widget* hovered_widget() const { return m_hovered_widget.ptr(); }
void set_hovered_widget(Widget*);
Gfx::Bitmap* front_bitmap() { return m_front_bitmap.ptr(); }
Gfx::Bitmap* back_bitmap() { return m_back_bitmap.ptr(); }
Gfx::Bitmap* back_bitmap();
Gfx::IntSize size_increment() const { return m_size_increment; }
void set_size_increment(const Gfx::IntSize&);
@ -221,14 +222,15 @@ private:
void server_did_destroy();
RefPtr<Gfx::Bitmap> create_backing_bitmap(const Gfx::IntSize&);
OwnPtr<WindowBackingStore> create_backing_store(const Gfx::IntSize&);
RefPtr<Gfx::Bitmap> create_shared_bitmap(Gfx::BitmapFormat, const Gfx::IntSize&);
void set_current_backing_bitmap(Gfx::Bitmap&, bool flush_immediately = false);
void set_current_backing_store(WindowBackingStore&, bool flush_immediately = false);
void flip(const Vector<Gfx::IntRect, 32>& dirty_rects);
void force_update();
RefPtr<Gfx::Bitmap> m_front_bitmap;
RefPtr<Gfx::Bitmap> m_back_bitmap;
OwnPtr<WindowBackingStore> m_front_store;
OwnPtr<WindowBackingStore> m_back_store;
RefPtr<Gfx::Bitmap> m_icon;
RefPtr<Gfx::Bitmap> m_custom_cursor;
int m_window_id { 0 };