151 lines
3.8 KiB
C++
151 lines
3.8 KiB
C++
/**
|
|
* @file llframetimer.cpp
|
|
*
|
|
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
|
|
* Second Life Viewer Source Code
|
|
* Copyright (C) 2010, Linden Research, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2.1 of the License only.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
|
|
* $/LicenseInfo$
|
|
*/
|
|
|
|
#include "linden_common.h"
|
|
|
|
#include "u64.h"
|
|
|
|
#include "llframetimer.h"
|
|
|
|
// Static members
|
|
//LLTimer LLFrameTimer::sInternalTimer;
|
|
U64 LLFrameTimer::sStartTotalTime = totalTime();
|
|
F64 LLFrameTimer::sFrameTime = 0.0;
|
|
U64 LLFrameTimer::sTotalTime = 0;
|
|
F64 LLFrameTimer::sTotalSeconds = 0.0;
|
|
S32 LLFrameTimer::sFrameCount = 0;
|
|
U64 LLFrameTimer::sFrameDeltaTime = 0;
|
|
const F64 USEC_TO_SEC_F64 = 0.000001;
|
|
|
|
// static
|
|
void LLFrameTimer::updateFrameTime()
|
|
{
|
|
U64 total_time = totalTime();
|
|
sFrameDeltaTime = total_time - sTotalTime;
|
|
sTotalTime = total_time;
|
|
sTotalSeconds = U64_to_F64(sTotalTime) * USEC_TO_SEC_F64;
|
|
sFrameTime = U64_to_F64(sTotalTime - sStartTotalTime) * USEC_TO_SEC_F64;
|
|
}
|
|
|
|
void LLFrameTimer::start()
|
|
{
|
|
reset();
|
|
mStarted = TRUE;
|
|
}
|
|
|
|
void LLFrameTimer::stop()
|
|
{
|
|
mStarted = FALSE;
|
|
}
|
|
|
|
void LLFrameTimer::reset()
|
|
{
|
|
mStartTime = sFrameTime;
|
|
mExpiry = sFrameTime;
|
|
}
|
|
|
|
void LLFrameTimer::resetWithExpiry(F32 expiration)
|
|
{
|
|
reset();
|
|
setTimerExpirySec(expiration);
|
|
}
|
|
|
|
// Don't combine pause/unpause with start/stop
|
|
// Useage:
|
|
// LLFrameTime foo; // starts automatically
|
|
// foo.unpause(); // noop but safe
|
|
// foo.pause(); // pauses timer
|
|
// foo.unpause() // unpauses
|
|
// F32 elapsed = foo.getElapsedTimeF32() // does not include time between pause() and unpause()
|
|
// Note: elapsed would also be valid with no unpause() call (= time run until pause() called)
|
|
void LLFrameTimer::pause()
|
|
{
|
|
if (mStarted)
|
|
mStartTime = sFrameTime - mStartTime; // save dtime
|
|
mStarted = FALSE;
|
|
}
|
|
|
|
void LLFrameTimer::unpause()
|
|
{
|
|
if (!mStarted)
|
|
mStartTime = sFrameTime - mStartTime; // restore dtime
|
|
mStarted = TRUE;
|
|
}
|
|
|
|
void LLFrameTimer::setTimerExpirySec(F32 expiration)
|
|
{
|
|
mExpiry = expiration + mStartTime;
|
|
}
|
|
|
|
void LLFrameTimer::setExpiryAt(F64 seconds_since_epoch)
|
|
{
|
|
mStartTime = sFrameTime;
|
|
mExpiry = seconds_since_epoch - (USEC_TO_SEC_F64 * sStartTotalTime);
|
|
}
|
|
|
|
F64 LLFrameTimer::expiresAt() const
|
|
{
|
|
F64 expires_at = U64_to_F64(sStartTotalTime) * USEC_TO_SEC_F64;
|
|
expires_at += mExpiry;
|
|
return expires_at;
|
|
}
|
|
|
|
BOOL LLFrameTimer::checkExpirationAndReset(F32 expiration)
|
|
{
|
|
//LL_INFOS() << "LLFrameTimer::checkExpirationAndReset()" << LL_ENDL;
|
|
//LL_INFOS() << " mStartTime:" << mStartTime << LL_ENDL;
|
|
//LL_INFOS() << " sFrameTime:" << sFrameTime << LL_ENDL;
|
|
//LL_INFOS() << " mExpiry: " << mExpiry << LL_ENDL;
|
|
|
|
if(hasExpired())
|
|
{
|
|
reset();
|
|
setTimerExpirySec(expiration);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
// static
|
|
F32 LLFrameTimer::getFrameDeltaTimeF32()
|
|
{
|
|
return (F32)(U64_to_F64(sFrameDeltaTime) * USEC_TO_SEC_F64);
|
|
}
|
|
|
|
|
|
// static
|
|
// Return seconds since the current frame started
|
|
F32 LLFrameTimer::getCurrentFrameTime()
|
|
{
|
|
U64 frame_time = totalTime() - sTotalTime;
|
|
return (F32)(U64_to_F64(frame_time) * USEC_TO_SEC_F64);
|
|
}
|
|
|
|
// Glue code to avoid full class .h file #includes
|
|
F32 getCurrentFrameTime()
|
|
{
|
|
return (F32)(LLFrameTimer::getCurrentFrameTime());
|
|
}
|