1 /* 2 * Copyright 2005, Haiku. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Axel Dörfler, axeld@pinc-software.de 7 */ 8 #ifndef SCREEN_MANAGER_H 9 #define SCREEN_MANAGER_H 10 11 12 #include <Looper.h> 13 #include <ObjectList.h> 14 15 class BMessage; 16 17 class DrawingEngine; 18 class HWInterface; 19 class Screen; 20 21 22 typedef BObjectList<Screen> ScreenList; 23 24 25 class ScreenOwner { 26 public: 27 virtual ~ScreenOwner() {}; 28 virtual void ScreenRemoved(Screen* screen) = 0; 29 virtual void ScreenAdded(Screen* screen) = 0; 30 31 virtual bool ReleaseScreen(Screen* screen) = 0; 32 }; 33 34 35 class ScreenManager : public BLooper { 36 public: 37 ScreenManager(); 38 virtual ~ScreenManager(); 39 40 Screen* ScreenAt(int32 index) const; 41 int32 CountScreens() const; 42 43 status_t AcquireScreens(ScreenOwner* owner, int32* wishList, 44 int32 wishCount, bool force, ScreenList& list); 45 void ReleaseScreens(ScreenList& list); 46 47 virtual void MessageReceived(BMessage* message); 48 49 private: 50 void _ScanDrivers(); 51 void _AddHWInterface(HWInterface* interface); 52 53 struct screen_item { 54 Screen* screen; 55 ScreenOwner* owner; 56 }; 57 58 BObjectList<screen_item> fScreenList; 59 }; 60 61 extern ScreenManager *gScreenManager; 62 63 #endif /* SCREEN_MANAGER_H */ 64