2020-09-20 14:16:44 +02:00
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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#ifndef __RFB_COMPARINGUPDATETRACKER_H__
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#define __RFB_COMPARINGUPDATETRACKER_H__
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#include <rfb/UpdateTracker.h>
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class scrollHasher_t;
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namespace rfb {
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class ComparingUpdateTracker : public SimpleUpdateTracker {
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public:
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ComparingUpdateTracker(PixelBuffer* buffer);
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~ComparingUpdateTracker();
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// compare() does the comparison and reduces its changed and copied regions
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// as appropriate. Returns true if the regions were altered.
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virtual bool compare(bool skipScrollDetection, const Region &skipCursorArea);
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// enable()/disable() turns the comparing functionality on/off. With it
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// disabled, the object will behave like a dumb update tracker (i.e.
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// compare() will be a no-op). It is harmless to repeatedly call these
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// methods.
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virtual void enable();
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virtual void disable();
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void logStats();
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virtual void getUpdateInfo(UpdateInfo* info, const Region& cliprgn);
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virtual void clear();
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2021-07-27 14:33:48 +02:00
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rdr::U8 changedPerc;
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2020-09-20 14:16:44 +02:00
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private:
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void compareRect(const Rect& r, Region* newchanged, const Region &skipCursorArea);
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PixelBuffer* fb;
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ManagedPixelBuffer oldFb;
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bool firstCompare;
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bool enabled;
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bool detectScroll;
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rdr::U32 totalPixels, missedPixels;
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scrollHasher_t *scrollHasher;
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std::vector<CopyPassRect> copyPassRects;
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};
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}
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#endif
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