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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.
*/
#include <stdio.h>
#include <rdr/OutStream.h>
#include <rfb/msgTypes.h>
#include <rfb/fenceTypes.h>
#include <rfb/encodings.h>
#include <rfb/Exception.h>
#include <rfb/PixelFormat.h>
#include <rfb/Rect.h>
#include <rfb/ConnParams.h>
#include <rfb/Decoder.h>
#include <rfb/CMsgWriter.h>
using namespace rfb;
CMsgWriter::CMsgWriter(ConnParams* cp_, rdr::OutStream* os_)
: cp(cp_), os(os_)
{
}
CMsgWriter::~CMsgWriter()
{
}
void CMsgWriter::writeClientInit(bool shared)
{
os->writeU8(shared);
endMsg();
}
void CMsgWriter::writeSetPixelFormat(const PixelFormat& pf)
{
startMsg(msgTypeSetPixelFormat);
os->pad(3);
pf.write(os);
endMsg();
}
void CMsgWriter::writeSetEncodings(int nEncodings, rdr::U32* encodings)
{
startMsg(msgTypeSetEncodings);
os->skip(1);
os->writeU16(nEncodings);
for (int i = 0; i < nEncodings; i++)
os->writeU32(encodings[i]);
endMsg();
}
// Ask for encodings based on which decoders are supported. Assumes higher
// encoding numbers are more desirable.
void CMsgWriter::writeSetEncodings(int preferredEncoding, bool useCopyRect)
{
int nEncodings = 0;
rdr::U32 encodings[encodingMax+3];
if (cp->supportsLocalCursor)
encodings[nEncodings++] = pseudoEncodingCursor;
if (cp->supportsDesktopResize)
encodings[nEncodings++] = pseudoEncodingDesktopSize;
if (cp->supportsExtendedDesktopSize)
encodings[nEncodings++] = pseudoEncodingExtendedDesktopSize;
if (cp->supportsDesktopRename)
encodings[nEncodings++] = pseudoEncodingDesktopName;
encodings[nEncodings++] = pseudoEncodingLastRect;
encodings[nEncodings++] = pseudoEncodingContinuousUpdates;
encodings[nEncodings++] = pseudoEncodingFence;
if (Decoder::supported(preferredEncoding)) {
encodings[nEncodings++] = preferredEncoding;
}
if (useCopyRect) {
encodings[nEncodings++] = encodingCopyRect;
}
/*
* Prefer encodings in this order:
*
* Tight, ZRLE, Hextile, *
*/
if ((preferredEncoding != encodingTight) &&
Decoder::supported(encodingTight))
encodings[nEncodings++] = encodingTight;
if ((preferredEncoding != encodingZRLE) &&
Decoder::supported(encodingZRLE))
encodings[nEncodings++] = encodingZRLE;
if ((preferredEncoding != encodingHextile) &&
Decoder::supported(encodingHextile))
encodings[nEncodings++] = encodingHextile;
// Remaining encodings
for (int i = encodingMax; i >= 0; i--) {
switch (i) {
case encodingCopyRect:
case encodingTight:
case encodingZRLE:
case encodingHextile:
/* These have already been sent earlier */
break;
default:
if ((i != preferredEncoding) && Decoder::supported(i))
encodings[nEncodings++] = i;
}
}
if (cp->compressLevel >= 0 && cp->compressLevel <= 9)
encodings[nEncodings++] = pseudoEncodingCompressLevel0 + cp->compressLevel;
if (cp->qualityLevel >= 0 && cp->qualityLevel <= 9)
encodings[nEncodings++] = pseudoEncodingQualityLevel0 + cp->qualityLevel;
writeSetEncodings(nEncodings, encodings);
}
void CMsgWriter::writeSetDesktopSize(int width, int height,
const ScreenSet& layout)
{
if (!cp->supportsSetDesktopSize)
throw Exception("Server does not support SetDesktopSize");
startMsg(msgTypeSetDesktopSize);
os->pad(1);
os->writeU16(width);
os->writeU16(height);
os->writeU8(layout.num_screens());
os->pad(1);
ScreenSet::const_iterator iter;
for (iter = layout.begin();iter != layout.end();++iter) {
os->writeU32(iter->id);
os->writeU16(iter->dimensions.tl.x);
os->writeU16(iter->dimensions.tl.y);
os->writeU16(iter->dimensions.width());
os->writeU16(iter->dimensions.height());
os->writeU32(iter->flags);
}
endMsg();
}
void CMsgWriter::writeFramebufferUpdateRequest(const Rect& r, bool incremental)
{
startMsg(msgTypeFramebufferUpdateRequest);
os->writeU8(incremental);
os->writeU16(r.tl.x);
os->writeU16(r.tl.y);
os->writeU16(r.width());
os->writeU16(r.height());
endMsg();
}
void CMsgWriter::writeEnableContinuousUpdates(bool enable,
int x, int y, int w, int h)
{
if (!cp->supportsContinuousUpdates)
throw Exception("Server does not support continuous updates");
startMsg(msgTypeEnableContinuousUpdates);
os->writeU8(!!enable);
os->writeU16(x);
os->writeU16(y);
os->writeU16(w);
os->writeU16(h);
endMsg();
}
void CMsgWriter::writeFence(rdr::U32 flags, unsigned len, const char data[])
{
if (!cp->supportsFence)
throw Exception("Server does not support fences");
if (len > 64)
throw Exception("Too large fence payload");
if ((flags & ~fenceFlagsSupported) != 0)
throw Exception("Unknown fence flags");
startMsg(msgTypeClientFence);
os->pad(3);
os->writeU32(flags);
os->writeU8(len);
os->writeBytes(data, len);
endMsg();
}
void CMsgWriter::keyEvent(rdr::U32 key, bool down)
{
startMsg(msgTypeKeyEvent);
os->writeU8(down);
os->pad(2);
os->writeU32(key);
endMsg();
}
void CMsgWriter::pointerEvent(const Point& pos, int buttonMask)
{
Point p(pos);
if (p.x < 0) p.x = 0;
if (p.y < 0) p.y = 0;
if (p.x >= cp->width) p.x = cp->width - 1;
if (p.y >= cp->height) p.y = cp->height - 1;
startMsg(msgTypePointerEvent);
os->writeU8(buttonMask);
os->writeU16(p.x);
os->writeU16(p.y);
endMsg();
}
void CMsgWriter::clientCutText(const char* str, rdr::U32 len)
{
startMsg(msgTypeClientCutText);
os->pad(3);
os->writeU32(len);
os->writeBytes(str, len);
endMsg();
}
void CMsgWriter::startMsg(int type)
{
os->writeU8(type);
}
void CMsgWriter::endMsg()
{
os->flush();
}
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