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