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43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
#pragma once
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#include <d3d9types.h>
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namespace dxvk {
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inline void DecodeD3DCOLOR(D3DCOLOR color, float* rgba) {
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// Encoded in D3DCOLOR as argb
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rgba[3] = (float)((color & 0xff000000) >> 24) / 255.0f;
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rgba[0] = (float)((color & 0x00ff0000) >> 16) / 255.0f;
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rgba[1] = (float)((color & 0x0000ff00) >> 8) / 255.0f;
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rgba[2] = (float)((color & 0x000000ff)) / 255.0f;
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}
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/**
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* \brief Computes refresh period for a given display refresh rate
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*
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* \param [in] numerator Numerator of refresh rate
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* \param [in] denominator Denominator of refresh rate
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* \returns Refresh period, in nanoseconds
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*/
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inline auto computeRefreshPeriod(uint64_t numerator, uint64_t denominator) {
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using unit = std::chrono::nanoseconds;
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unit::rep ns = unit::rep(unit::period::den * denominator)
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/ unit::rep(unit::period::num * numerator);
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return unit(ns);
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}
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/**
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* \brief Computes refresh count within a given time period
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*
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* \param [in] t0 Start time
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* \param [in] t1 End time
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* \param [in] refreshPeriod Refresh period
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* \returns Number of refreshes between t1 and t0
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*/
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template<typename TimePoint, typename Duration>
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uint64_t computeRefreshCount(TimePoint t0, TimePoint t1, Duration refreshPeriod) {
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auto duration = std::chrono::duration_cast<Duration>(t1 - t0);
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return duration.count() / refreshPeriod.count();
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}
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} |