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3f1737eaeb
It is only linked for Windows, macOS and Linux, but disabled by default. Vulkan support is also enabled if Vulkan is found.
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#include "Common.hpp"
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#include <cmath>
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#include <numeric>
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#include <thread>
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namespace boo {
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void UpdateGammaLUT(ITextureD* tex, float gamma) {
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void* data = tex->map(65536 * 2);
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for (int i = 0; i < 65536; ++i) {
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float level = std::pow(i / 65535.f, gamma);
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reinterpret_cast<uint16_t*>(data)[i] = level * 65535.f;
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}
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tex->unmap();
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}
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void Limiter::Sleep(nanotime_t targetFrameTime) {
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OPTICK_EVENT();
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if (targetFrameTime == 0) {
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return;
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}
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auto start = delta_clock::now();
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nanotime_t sleepTime = targetFrameTime - TimeSince(m_oldTime);
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m_overhead = std::accumulate(m_overheadTimes.begin(), m_overheadTimes.end(), nanotime_t{}) /
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static_cast<nanotime_t>(m_overheadTimes.size());
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if (sleepTime > m_overhead) {
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nanotime_t adjustedSleepTime = sleepTime - m_overhead;
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std::this_thread::sleep_for(std::chrono::nanoseconds(adjustedSleepTime));
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nanotime_t overslept = TimeSince(start) - adjustedSleepTime;
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if (overslept < targetFrameTime) {
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m_overheadTimes[m_overheadTimeIdx] = overslept;
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m_overheadTimeIdx = (m_overheadTimeIdx + 1) % m_overheadTimes.size();
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}
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}
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m_oldTime = delta_clock::now();
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}
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} // namespace boo
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