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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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9
Kernel/Process.h
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@@ -20,6 +20,7 @@ class Region;
class VMObject;
class Zone;
class WSWindow;
class GraphicsBitmap;
#define COOL_GLOBALS
#ifdef COOL_GLOBALS
@@ -197,9 +198,12 @@ public:
int gui$create_window(const GUI_WindowParameters*);
int gui$destroy_window(int window_id);
int gui$get_window_backing_store(int window_id, GUI_WindowBackingStoreInfo*);
int gui$release_window_backing_store(void* backing_store_id);
int gui$invalidate_window(int window_id, const GUI_Rect*);
int gui$get_window_parameters(int window_id, GUI_WindowParameters*);
int gui$set_window_parameters(int window_id, const GUI_WindowParameters*);
int gui$get_window_title(int window_id, char* buffer, size_t size);
int gui$set_window_title(int window_id, const char* title, size_t size);
int gui$get_window_rect(int window_id, GUI_Rect*);
int gui$set_window_rect(int window_id, const GUI_Rect*);
DisplayInfo get_display_info();
@@ -360,6 +364,7 @@ private:
RetainPtr<Region> m_display_framebuffer_region;
HashMap<int, OwnPtr<WSWindow>> m_windows;
Vector<RetainPtr<GraphicsBitmap>> m_retained_backing_stores;
Vector<GUI_Event> m_gui_events;
Lock m_gui_events_lock;