| Constantin Kaplinsky | 47ed8d3 | 2004-10-08 09:43:57 +0000 | [diff] [blame^] | 1 | /* Copyright (C) 2002-2004 RealVNC Ltd. All Rights Reserved. |
| 2 | * |
| 3 | * This is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License as published by |
| 5 | * the Free Software Foundation; either version 2 of the License, or |
| 6 | * (at your option) any later version. |
| 7 | * |
| 8 | * This software is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this software; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 16 | * USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef __RFB_COMPARINGUPDATETRACKER_H__ |
| 20 | #define __RFB_COMPARINGUPDATETRACKER_H__ |
| 21 | |
| 22 | #include <rfb/UpdateTracker.h> |
| 23 | |
| 24 | namespace rfb { |
| 25 | |
| 26 | class ComparingUpdateTracker : public SimpleUpdateTracker { |
| 27 | public: |
| 28 | ComparingUpdateTracker(PixelBuffer* buffer); |
| 29 | ~ComparingUpdateTracker(); |
| 30 | |
| 31 | // compare() does the comparison and reduces its changed and copied regions |
| 32 | // as appropriate. |
| 33 | |
| 34 | virtual void compare(); |
| 35 | |
| 36 | virtual void flush_update(UpdateInfo* info, const Region& cliprgn, |
| 37 | int maxArea); |
| 38 | virtual void flush_update(UpdateTracker &info, const Region &cliprgn); |
| 39 | private: |
| 40 | void compareRect(const Rect& r, Region* newchanged); |
| 41 | PixelBuffer* fb; |
| 42 | ManagedPixelBuffer oldFb; |
| 43 | bool firstCompare; |
| 44 | }; |
| 45 | |
| 46 | } |
| 47 | #endif |