ClientConnectionRRE.cpp
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// Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
//
// This file is part of the VNC system.
//
// The VNC system 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 program 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 program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
// If the source code for the VNC system is not available from the place
// whence you received this file, check http://www.uk.research.att.com/vnc or
// contact the authors on vnc@uk.research.att.com for information on obtaining it.
//
// RRE (Rising Rectangle Encoding)
//
// The bits of the ClientConnection object to do with RRE.
#include "stdhdrs.h"
#include "vncviewer.h"
#include "ClientConnection.h"
void ClientConnection::ReadRRERect(rfbFramebufferUpdateRectHeader *pfburh)
{
// An RRE rect is always followed by a background color
// For speed's sake we read them together into a buffer.
char tmpbuf[sz_rfbRREHeader+4]; // biggest pixel is 4 bytes long
rfbRREHeader *prreh = (rfbRREHeader *) tmpbuf;
CARD8 *pcolor = (CARD8 *) tmpbuf + sz_rfbRREHeader;
ReadExact(tmpbuf, sz_rfbRREHeader + m_minPixelBytes);
prreh->nSubrects = Swap32IfLE(prreh->nSubrects);
SETUP_COLOR_SHORTCUTS;
COLORREF color;
switch (m_myFormat.bitsPerPixel) {
case 8:
color = COLOR_FROM_PIXEL8_ADDRESS(pcolor); break;
case 16:
color = COLOR_FROM_PIXEL16_ADDRESS(pcolor); break;
case 24:
case 32:
color = COLOR_FROM_PIXEL32_ADDRESS(pcolor); break;
}
// No other threads can use bitmap DC
omni_mutex_lock l(m_bitmapdcMutex);
ObjectSelector b(m_hBitmapDC, m_hBitmap);
PaletteSelector ps(m_hBitmapDC, m_hPalette);
// Draw the background of the rectangle
FillSolidRect(pfburh->r.x, pfburh->r.y, pfburh->r.w, pfburh->r.h, color);
if (prreh->nSubrects == 0) return;
// Draw the sub-rectangles
rfbRectangle rect, *pRect;
// The size of an RRE subrect including color info
int subRectSize = m_minPixelBytes + sz_rfbRectangle;
// Read subrects into the buffer
CheckBufferSize(subRectSize * prreh->nSubrects);
ReadExact(m_netbuf, subRectSize * prreh->nSubrects);
BYTE *p = (BYTE *) m_netbuf;
for (CARD32 i = 0; i < prreh->nSubrects; i++) {
pRect = (rfbRectangle *) (p + m_minPixelBytes);
switch (m_myFormat.bitsPerPixel) {
case 8:
color = COLOR_FROM_PIXEL8_ADDRESS(p); break;
case 16:
color = COLOR_FROM_PIXEL16_ADDRESS(p); break;
case 32:
color = COLOR_FROM_PIXEL32_ADDRESS(p); break;
};
rect.x = (CARD16) (Swap16IfLE(pRect->x) + pfburh->r.x);
rect.y = (CARD16) (Swap16IfLE(pRect->y) + pfburh->r.y);
rect.w = Swap16IfLE(pRect->w);
rect.h = Swap16IfLE(pRect->h);
FillSolidRect(rect.x, rect.y, rect.w, rect.h, color);
p+=subRectSize;
}
}