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110 lines
3.3 KiB
C++
110 lines
3.3 KiB
C++
/* 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_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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#include <vector>
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namespace rfb {
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struct CopyPassRect {
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Rect rect;
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unsigned src_x, src_y;
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};
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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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std::vector<CopyPassRect> copypassed;
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bool is_empty() const {
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return copied.is_empty() && changed.is_empty() && copypassed.empty();
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}
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// NOTE: We do not ever use UpdateInfo::numRects(), because Tight encoding
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// complicates computing the number of rectangles.
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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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};
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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 ClippingUpdateTracker : public UpdateTracker {
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public:
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ClippingUpdateTracker() : ut(0) {}
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ClippingUpdateTracker(UpdateTracker* ut_, const Rect& r=Rect()) : ut(ut_), clipRect(r) {}
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void setUpdateTracker(UpdateTracker* ut_) {ut = ut_;}
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void setClipRect(const Rect& cr) {clipRect = cr;}
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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* ut;
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Rect clipRect;
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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=true);
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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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// FIXME: Provide getUpdateInfo() with no clipping, for better efficiency.
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virtual void getUpdateInfo(UpdateInfo* info, const Region& cliprgn);
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// Copy the contained updates to another tracker
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virtual void copyTo(UpdateTracker* to) const;
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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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