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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright 2009-2014 Pierre Ossman for Cendio AB
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
//
// SMsgWriter - class for writing RFB messages on the server side.
//
#ifndef __RFB_SMSGWRITER_H__
#define __RFB_SMSGWRITER_H__
#include <rdr/types.h>
#include <rfb/encodings.h>
#include <rfb/ScreenSet.h>
namespace rdr { class OutStream; }
namespace rfb {
class ConnParams;
class ScreenSet;
class SMsgWriter {
public:
SMsgWriter(ConnParams* cp, rdr::OutStream* os);
virtual ~SMsgWriter();
// writeServerInit() must only be called at the appropriate time in the
// protocol initialisation.
void writeServerInit();
// Methods to write normal protocol messages
// writeSetColourMapEntries() writes a setColourMapEntries message, using
// the given colour entries.
void writeSetColourMapEntries(int firstColour, int nColours,
const rdr::U16 red[],
const rdr::U16 green[],
const rdr::U16 blue[]);
// writeBell() and writeServerCutText() do the obvious thing.
void writeBell();
void writeServerCutText(const char* str, int len);
// writeFence() sends a new fence request or response to the client.
void writeFence(rdr::U32 flags, unsigned len, const char data[]);
// writeEndOfContinuousUpdates() indicates that we have left continuous
// updates mode.
void writeEndOfContinuousUpdates();
// writeSetDesktopSize() won't actually write immediately, but will
// write the relevant pseudo-rectangle as part of the next update.
bool writeSetDesktopSize();
// Same thing for the extended version. The first version queues up a
// generic update of the current server state, but the second queues a
// specific message.
bool writeExtendedDesktopSize();
bool writeExtendedDesktopSize(rdr::U16 reason, rdr::U16 result,
int fb_width, int fb_height,
const ScreenSet& layout);
bool writeSetDesktopName();
// Like setDesktopSize, we can't just write out a cursor message
// immediately.
bool writeSetCursor();
bool writeSetXCursor();
// needFakeUpdate() returns true when an immediate update is needed in
// order to flush out pseudo-rectangles to the client.
bool needFakeUpdate();
// needNoDataUpdate() returns true when an update without any
// framebuffer changes need to be sent (using writeNoDataUpdate()).
// Commonly this is an update that modifies the size of the framebuffer
// or the screen layout.
bool needNoDataUpdate();
// writeNoDataUpdate() write a framebuffer update containing only
// pseudo-rectangles.
void writeNoDataUpdate();
// writeFramebufferUpdateStart() initiates an update which you can fill
// in using writeCopyRect() and encoders. Finishing the update by calling
// writeFramebufferUpdateEnd().
void writeFramebufferUpdateStart(int nRects);
void writeFramebufferUpdateEnd();
// There is no explicit encoder for CopyRect rects.
void writeCopyRect(const Rect& r, int srcX, int srcY);
// Encoders should call these to mark the start and stop of individual
// rects.
void startRect(const Rect& r, int enc);
void endRect();
int getUpdatesSent() { return updatesSent; }
int getRectsSent(int encoding) { return rectsSent[encoding]; }
int getBytesSent(int encoding) { return bytesSent[encoding]; }
rdr::U64 getRawBytesEquivalent() { return rawBytesEquivalent; }
protected:
void startMsg(int type);
void endMsg();
void writePseudoRects();
void writeNoDataRects();
void writeSetDesktopSizeRect(int width, int height);
void writeExtendedDesktopSizeRect(rdr::U16 reason, rdr::U16 result,
int fb_width, int fb_height,
const ScreenSet& layout);
void writeSetDesktopNameRect(const char *name);
void writeSetCursorRect(int width, int height,
int hotspotX, int hotspotY,
const void* data, const void* mask);
void writeSetXCursorRect(int width, int height,
int hotspotX, int hotspotY,
const rdr::U8 pix0[], const rdr::U8 pix1[],
const void* data, const void* mask);
ConnParams* cp;
rdr::OutStream* os;
int currentEncoding;
int nRectsInUpdate;
int nRectsInHeader;
bool needSetDesktopSize;
bool needExtendedDesktopSize;
bool needSetDesktopName;
bool needLastRect;
bool needSetCursor;
bool needSetXCursor;
int lenBeforeRect;
int updatesSent;
int bytesSent[encodingMax+1];
int rectsSent[encodingMax+1];
rdr::U64 rawBytesEquivalent;
typedef struct {
rdr::U16 reason, result;
int fb_width, fb_height;
ScreenSet layout;
} ExtendedDesktopSizeMsg;
std::list<ExtendedDesktopSizeMsg> extendedDesktopSizeMsgs;
};
}
#endif
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