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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
*
* 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.
*/
// -=- SDisplayCorePolling.cxx
#include <rfb_win32/SDisplayCorePolling.h>
#include <rfb/LogWriter.h>
#include <rfb/util.h>
using namespace rfb;
using namespace rfb::win32;
static LogWriter vlog("SDisplayCorePolling");
const int POLLING_SEGMENTS = 16;
const int SDisplayCorePolling::pollTimerId = 1;
SDisplayCorePolling::SDisplayCorePolling(SDisplay* d, UpdateTracker* ut, int pollInterval_)
: MsgWindow(_T("rfb::win32::SDisplayCorePolling")),
pollTimer(getHandle(), pollTimerId), pollNextStrip(false), display(d), updateTracker(ut) {
pollInterval = __rfbmax(10, (pollInterval_ / POLLING_SEGMENTS));
copyrect.setUpdateTracker(ut);
}
SDisplayCorePolling::~SDisplayCorePolling() {
}
LRESULT SDisplayCorePolling::processMessage(UINT msg, WPARAM wParam, LPARAM lParam) {
if (msg == WM_TIMER && wParam == pollTimerId) {
pollNextStrip = true;
SetEvent(display->getUpdateEvent());
return 0;
}
return MsgWindow::processMessage(msg, wParam, lParam);
}
void SDisplayCorePolling::setScreenRect(const Rect& screenRect_) {
vlog.info("setScreenRect");
screenRect = screenRect_;
pollIncrementY = (screenRect.height()+POLLING_SEGMENTS-1)/POLLING_SEGMENTS;
pollNextY = screenRect.tl.y;
pollTimer.start(pollInterval);
}
void SDisplayCorePolling::flushUpdates() {
vlog.write(120, "flushUpdates");
// Check for window movement
while (copyrect.processEvent()) {}
if (pollNextStrip) {
// Poll the next strip of the screen (in Screen coordinates)
pollNextStrip = false;
Rect pollrect = screenRect;
if (pollNextY >= pollrect.br.y) {
// Yes. Reset the counter and return
pollNextY = pollrect.tl.y;
} else {
// No. Poll the next section
pollrect.tl.y = pollNextY;
pollNextY += pollIncrementY;
pollrect.br.y = __rfbmin(pollNextY, pollrect.br.y);
updateTracker->add_changed(pollrect);
}
}
}
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