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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.
*
* Additional copyright for this file:
* Copyright (C) 1995-1997 Presto Studios, Inc.
*
* 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.
*
*/
#ifndef PEGASUS_TIMERS_H
#define PEGASUS_TIMERS_H
#include "common/list.h"
#include "common/rational.h"
#include "pegasus/constants.h"
namespace Pegasus {
class Idler {
friend class PegasusEngine;
public:
Idler();
virtual ~Idler();
virtual void startIdling();
virtual void stopIdling();
bool isIdling() const { return _isIdling; }
protected:
virtual void useIdleTime() {}
bool _isIdling;
};
enum {
kLoopTimeBase = 1,
kPalindromeLoopTimeBase = 2,
kMaintainTimeBaseZero = 4
};
class TimeBaseCallBack;
class TimeBase {
friend class TimeBaseCallBack;
public:
TimeBase(const TimeScale = kDefaultTimeScale);
virtual ~TimeBase();
virtual void setTime(const TimeValue, const TimeScale = 0);
virtual TimeValue getTime(const TimeScale = 0);
virtual void setScale(const TimeScale scale) { _preferredScale = scale; }
virtual TimeScale getScale() const { return _preferredScale; }
virtual void setRate(const Common::Rational);
virtual Common::Rational getRate() const { return _rate; }
virtual void start();
virtual void stop();
virtual bool isRunning();
virtual void pause();
virtual void resume();
bool isPaused() const { return _paused; }
virtual void setFlags(const uint32 flags) { _flags = flags; }
virtual uint32 getFlags() const { return _flags; }
virtual void setStart(const TimeValue, const TimeScale = 0);
virtual TimeValue getStart(const TimeScale = 0) const;
virtual void setStop(const TimeValue, const TimeScale = 0);
virtual TimeValue getStop(const TimeScale = 0) const;
virtual void setSegment(const TimeValue, const TimeValue, const TimeScale = 0);
virtual void getSegment(TimeValue&, TimeValue&, const TimeScale = 0) const;
virtual TimeValue getDuration(const TimeScale = 0) const;
virtual void setMasterTimeBase(TimeBase *timeBase);
void disposeAllCallBacks();
// ScummVM's API additions (to replace the need for actual timers)
void checkCallBacks();
protected:
void addCallBack(TimeBaseCallBack *);
void removeCallBack(TimeBaseCallBack *);
TimeBase *_master;
TimeScale _preferredScale;
TimeBaseCallBack *_callBackList;
Common::Rational _rate, _pausedRate;
bool _paused;
uint32 _startTime, _startScale;
uint32 _stopTime, _stopScale;
int32 _timeOffset;
uint32 _flags;
TimeValue _pausedTime;
private:
Common::Rational getEffectiveRate() const;
Common::List<TimeBase *> _slaves;
};
// Type passed to initCallBack()
enum CallBackType {
kCallBackNone = 0,
kCallBackAtTime = 1,
kCallBackAtExtremes = 4
};
// Trigger passed to scheduleCallBack()
enum CallBackTrigger {
kTriggerNone = 0,
// AtTime flags
kTriggerTimeFwd = 1,
// AtExtremes flags
kTriggerAtStart = 1,
kTriggerAtStop = 2
};
class TimeBaseCallBack {
friend class TimeBase;
public:
TimeBaseCallBack();
virtual ~TimeBaseCallBack();
void initCallBack(TimeBase *, CallBackType type);
void releaseCallBack();
void scheduleCallBack(CallBackTrigger trigger, uint32 param2, uint32 param3);
void cancelCallBack();
protected:
virtual void callBack() = 0;
TimeBase *_timeBase;
// Owned and operated by TimeBase;
TimeBaseCallBack *_nextCallBack;
// Our storage of the QuickTime timer crap
CallBackType _type;
CallBackTrigger _trigger;
uint32 _param2, _param3;
private:
void disposeCallBack();
};
class IdlerTimeBase : public Idler, public TimeBase {
public:
IdlerTimeBase();
virtual ~IdlerTimeBase() { stopIdling(); }
TimeValue getLastTime() const { return _lastTime; }
protected:
virtual void useIdleTime();
virtual void timeChanged(const TimeValue) {}
TimeValue _lastTime;
};
class Notification;
class NotificationCallBack : public TimeBaseCallBack {
public:
NotificationCallBack();
virtual ~NotificationCallBack() {}
void setNotification(Notification *notifier) { _notifier = notifier; }
void setCallBackFlag(const tNotificationFlags flag) { _callBackFlag = flag; }
tNotificationFlags getCallBackFlag() const { return _callBackFlag; }
protected:
void callBack();
Notification *_notifier;
tNotificationFlags _callBackFlag;
};
class DynamicElement : public TimeBase {
public:
TimeValue percentSeconds(const uint32 percent) { return getScale() * percent / 100; }
};
} // End of namespace Pegasus
#endif
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