libretro-dolphin/Source/Core/VideoCommon/FPSCounter.cpp

50 lines
1.1 KiB
C++

// Copyright 2012 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <fstream>
#include <iomanip>
#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "Common/Timer.h"
#include "VideoCommon/FPSCounter.h"
#include "VideoCommon/VideoConfig.h"
static constexpr u64 FPS_REFRESH_INTERVAL = 250000;
FPSCounter::FPSCounter()
{
m_last_time = Common::Timer::GetTimeUs();
}
void FPSCounter::LogRenderTimeToFile(u64 val)
{
if (!m_bench_file.is_open())
{
File::OpenFStream(m_bench_file, File::GetUserPath(D_LOGS_IDX) + "render_time.txt",
std::ios_base::out);
}
m_bench_file << std::fixed << std::setprecision(8) << (val / 1000.0) << std::endl;
}
void FPSCounter::Update()
{
u64 time = Common::Timer::GetTimeUs();
u64 diff = time - m_last_time;
if (g_ActiveConfig.bLogRenderTimeToFile)
LogRenderTimeToFile(diff);
m_frame_counter++;
m_time_since_update += diff;
m_last_time = time;
if (m_time_since_update >= FPS_REFRESH_INTERVAL)
{
m_fps = m_frame_counter / (m_time_since_update / 1000000.0);
m_frame_counter = 0;
m_time_since_update = 0;
}
}