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https://github.com/TigerVNC/tigervnc.git
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47ed8d321c
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
108 lines
3.3 KiB
C++
108 lines
3.3 KiB
C++
/* Copyright (C) 2002-2004 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_UPDATETRACKER_INCLUDED__
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#define __RFB_UPDATETRACKER_INCLUDED__
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#include <rfb/Rect.h>
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#include <rfb/Region.h>
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#include <rfb/PixelBuffer.h>
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namespace rfb {
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class UpdateInfo {
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public:
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Region changed;
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Region copied;
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Point copy_delta;
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bool is_empty() const {
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return copied.is_empty() && changed.is_empty();
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}
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int numRects() const {
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return copied.numRects() + changed.numRects();
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}
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};
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class UpdateTracker {
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public:
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UpdateTracker() {};
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virtual ~UpdateTracker() {};
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virtual void add_changed(const Region ®ion) = 0;
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virtual void add_copied(const Region &dest, const Point &delta) = 0;
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};
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class ClippedUpdateTracker : public UpdateTracker {
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public:
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ClippedUpdateTracker(UpdateTracker &child_) : child(child_) {};
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ClippedUpdateTracker(UpdateTracker &child_,
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const Region &cliprgn_) : child(child_), cliprgn(cliprgn_) {};
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virtual ~ClippedUpdateTracker() {};
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virtual void set_clip_region(const Region cliprgn_) {cliprgn = cliprgn_;};
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virtual void add_changed(const Region ®ion);
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virtual void add_copied(const Region &dest, const Point &delta);
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protected:
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UpdateTracker &child;
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Region cliprgn;
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};
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class SimpleUpdateTracker : public UpdateTracker {
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public:
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SimpleUpdateTracker(bool use_copyrect=false);
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virtual ~SimpleUpdateTracker();
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virtual void enable_copyrect(bool enable);
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virtual void add_changed(const Region ®ion);
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virtual void add_copied(const Region &dest, const Point &delta);
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virtual void subtract(const Region& region);
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// Fill the supplied UpdateInfo structure with update information
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virtual void get_update(UpdateInfo* info, const Region& cliprgn);
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// Pass the current updates to the supplied tracker
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virtual void get_update(UpdateTracker &to) const;
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// Also removes the updates that are returned from this update tracker
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virtual void flush_update(UpdateTracker &to, const Region &cliprgn);
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// Get the changed/copied regions
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const Region& get_changed() const {return changed;}
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const Region& get_copied() const {return copied;}
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const Point& get_delta() const {return copy_delta;}
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// Move the entire update region by an offset
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void translate(const Point& p) {changed.translate(p); copied.translate(p);}
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virtual bool is_empty() const {return changed.is_empty() && copied.is_empty();}
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virtual void clear() {changed.clear(); copied.clear();};
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protected:
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Region changed;
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Region copied;
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Point copy_delta;
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bool copy_enabled;
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};
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}
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#endif // __RFB_UPDATETRACKER_INCLUDED__
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