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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*
*/
#include "common/scummsys.h"
#include "common/system.h"
#include "zvision/clock.h"
namespace ZVision {
Clock::Clock(OSystem *system)
: _system(system),
_lastTime(0),
_deltaTime(0),
_pausedTime(0),
_paused(false) {
}
void Clock::update() {
uint32 currentTime = _system->getMillis();
_deltaTime = (currentTime - _lastTime);
if (_paused) {
_deltaTime -= (currentTime - _pausedTime);
}
if (_deltaTime < 0) {
_deltaTime = 0;
}
_lastTime = currentTime;
}
void Clock::start() {
if (_paused) {
_lastTime = _system->getMillis();
_paused = false;
}
}
void Clock::stop() {
if (!_paused) {
_pausedTime = _system->getMillis();
_paused = true;
}
}
} // End of namespace ZVision
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