120 lines
2.9 KiB
C++
120 lines
2.9 KiB
C++
// Copyright (c) 2016-2018 Kiwano - Nomango
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include <kiwano/utils/Timer.h>
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#include <kiwano/core/Allocator.h>
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namespace kiwano
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{
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TimerPtr Timer::Create()
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{
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TimerPtr ptr = memory::New<Timer>();
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return ptr;
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}
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Timer::Timer()
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: is_paused_(false)
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{
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Reset();
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}
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Timer::~Timer() {}
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Duration Timer::GetDeltaTime() const
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{
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return delta_time_;
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}
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Duration Timer::GetTotalTime() const
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{
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if (is_paused_)
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return paused_time_ - start_time_ - total_idle_time_;
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return current_time_ - start_time_ - total_idle_time_;
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}
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bool Timer::IsPausing() const
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{
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return is_paused_;
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}
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void Timer::Tick()
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{
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if (is_paused_)
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{
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delta_time_ = 0;
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return;
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}
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current_time_ = Time::Now();
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// compute the time elapsed since the previous frame
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delta_time_ = (current_time_ - previous_time_);
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// set previous time to current time, as in the next tick, this frame will be the previous frame
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previous_time_ = current_time_;
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// delta time can be negative if the processor goes idle for example
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if (delta_time_ < 0)
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delta_time_ = 0;
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}
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void Timer::Resume()
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{
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if (is_paused_)
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{
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const auto now = Time::Now();
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// add the duration of the pause to the total idle time
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total_idle_time_ += (now - paused_time_);
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// set the previous time to the current time
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previous_time_ = now;
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paused_time_ = Time();
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is_paused_ = false;
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}
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}
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void Timer::Pause()
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{
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if (!is_paused_)
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{
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const auto now = Time::Now();
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paused_time_ = now;
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is_paused_ = true;
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}
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}
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void Timer::Reset()
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{
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const auto now = Time::Now();
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start_time_ = now;
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current_time_ = now;
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previous_time_ = now;
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paused_time_ = Time();
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delta_time_ = 0;
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is_paused_ = false;
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}
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} // namespace kiwano
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