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DaemoandGitHub
63fe3088bf
The current Fps manager will sometime skip the intended delay and start the next frame immediately, I'm not 100% sure why it happens, but I rewrote most of it to stay consistent and improved the overall precision by compensating for OS wake delay after sleep and finishing with a busy wait I also changed the behavior of mlx_set_fps_goal to allow zero/negative values and treat them as uncapped (like most graphics libraries)
38 lines
880 B
C++
38 lines
880 B
C++
#include <PreCompiled.h>
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#include <Core/Fps.h>
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#ifndef __APPLE__
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#include <emmintrin.h>
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#endif
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namespace mlx
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{
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void FpsManager::Init()
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{
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m_current_time = fps_clock::now();
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m_target_time = m_current_time + m_target_delta;
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}
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void FpsManager::WaitUntilNextFrame()
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{
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m_current_time = fps_clock::now();
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if(m_current_time < m_target_time)
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{
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std::this_thread::sleep_until(m_target_time - m_sleep_margin);
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m_current_time = fps_clock::now();
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while (m_current_time < m_target_time)
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{
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#ifndef __APPLE__
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_mm_pause(); // reduces CPU usage on x86 without yielding
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#endif
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m_current_time = fps_clock::now();
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}
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}
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else if (m_target_time < m_current_time - m_target_delta * 4)
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m_target_time = m_current_time;
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m_target_time += m_target_delta;
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m_delta_time = m_current_time - m_last_time_record;
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m_last_time_record = m_current_time;
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}
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}
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