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#include "window_info.h"
#include "common/log.h"
Log_SetChannel(WindowInfo);
#if defined(_WIN32)
#include "common/windows_headers.h"
#include <dwmapi.h>
static bool GetRefreshRateFromDWM(HWND hwnd, float* refresh_rate)
{
static HMODULE dwm_module = nullptr;
static HRESULT(STDAPICALLTYPE * is_composition_enabled)(BOOL * pfEnabled) = nullptr;
static HRESULT(STDAPICALLTYPE * get_timing_info)(HWND hwnd, DWM_TIMING_INFO * pTimingInfo) = nullptr;
static bool load_tried = false;
if (!load_tried)
{
load_tried = true;
dwm_module = LoadLibrary("dwmapi.dll");
if (dwm_module)
{
std::atexit([]() {
FreeLibrary(dwm_module);
dwm_module = nullptr;
});
is_composition_enabled =
reinterpret_cast<decltype(is_composition_enabled)>(GetProcAddress(dwm_module, "DwmIsCompositionEnabled"));
get_timing_info =
reinterpret_cast<decltype(get_timing_info)>(GetProcAddress(dwm_module, "DwmGetCompositionTimingInfo"));
}
}
BOOL composition_enabled;
if (!is_composition_enabled || FAILED(is_composition_enabled(&composition_enabled) || !get_timing_info))
return false;
DWM_TIMING_INFO ti = {};
ti.cbSize = sizeof(ti);
HRESULT hr = get_timing_info(nullptr, &ti);
if (SUCCEEDED(hr))
{
if (ti.rateRefresh.uiNumerator == 0 || ti.rateRefresh.uiDenominator == 0)
return false;
*refresh_rate = static_cast<float>(ti.rateRefresh.uiNumerator) / static_cast<float>(ti.rateRefresh.uiDenominator);
return true;
}
return false;
}
static bool GetRefreshRateFromMonitor(HWND hwnd, float* refresh_rate)
{
HMONITOR mon = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
if (!mon)
return false;
MONITORINFOEXW mi = {};
mi.cbSize = sizeof(mi);
if (GetMonitorInfoW(mon, &mi))
{
DEVMODEW dm = {};
dm.dmSize = sizeof(dm);
// 0/1 are reserved for "defaults".
if (EnumDisplaySettingsW(mi.szDevice, ENUM_CURRENT_SETTINGS, &dm) && dm.dmDisplayFrequency > 1)
{
*refresh_rate = static_cast<float>(dm.dmDisplayFrequency);
return true;
}
}
return false;
}
bool WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi, float* refresh_rate)
{
if (wi.type != Type::Win32 || !wi.window_handle)
return false;
// Try DWM first, then fall back to integer values.
const HWND hwnd = static_cast<HWND>(wi.window_handle);
return GetRefreshRateFromDWM(hwnd, refresh_rate) || GetRefreshRateFromMonitor(hwnd, refresh_rate);
}
#else
#ifdef USE_X11
#include "common/scoped_guard.h"
#include "gl/x11_window.h"
#include <X11/extensions/Xrandr.h>
static bool GetRefreshRateFromXRandR(const WindowInfo& wi, float* refresh_rate)
{
Display* display = static_cast<Display*>(wi.display_connection);
Window window = static_cast<Window>(reinterpret_cast<uintptr_t>(wi.window_handle));
if (!display || !window)
return false;
GL::X11InhibitErrors inhibiter;
XRRScreenResources* res = XRRGetScreenResources(display, window);
if (!res)
{
Log_ErrorPrint("XRRGetScreenResources() failed");
return false;
}
ScopedGuard res_guard([res]() { XRRFreeScreenResources(res); });
int num_monitors;
XRRMonitorInfo* mi = XRRGetMonitors(display, window, True, &num_monitors);
if (num_monitors < 0)
{
Log_ErrorPrint("XRRGetMonitors() failed");
return false;
}
else if (num_monitors > 1)
{
Log_WarningPrintf("XRRGetMonitors() returned %d monitors, using first", num_monitors);
}
ScopedGuard mi_guard([mi]() { XRRFreeMonitors(mi); });
if (mi->noutput <= 0)
{
Log_ErrorPrint("Monitor has no outputs");
return false;
}
else if (mi->noutput > 1)
{
Log_WarningPrintf("Monitor has %d outputs, using first", mi->noutput);
}
XRROutputInfo* oi = XRRGetOutputInfo(display, res, mi->outputs[0]);
if (!oi)
{
Log_ErrorPrint("XRRGetOutputInfo() failed");
return false;
}
ScopedGuard oi_guard([oi]() { XRRFreeOutputInfo(oi); });
XRRCrtcInfo* ci = XRRGetCrtcInfo(display, res, oi->crtc);
if (!ci)
{
Log_ErrorPrint("XRRGetCrtcInfo() failed");
return false;
}
ScopedGuard ci_guard([ci]() { XRRFreeCrtcInfo(ci); });
XRRModeInfo* mode = nullptr;
for (int i = 0; i < res->nmode; i++)
{
if (res->modes[i].id == ci->mode)
{
mode = &res->modes[i];
break;
}
}
if (!mode)
{
Log_ErrorPrintf("Failed to look up mode %d (of %d)", static_cast<int>(ci->mode), res->nmode);
return false;
}
if (mode->dotClock == 0 || mode->hTotal == 0 || mode->vTotal == 0)
{
Log_ErrorPrintf("Modeline is invalid: %ld/%d/%d", mode->dotClock, mode->hTotal, mode->vTotal);
return false;
}
*refresh_rate =
static_cast<double>(mode->dotClock) / (static_cast<double>(mode->hTotal) * static_cast<double>(mode->vTotal));
return true;
}
#endif // USE_X11
bool WindowInfo::QueryRefreshRateForWindow(const WindowInfo& wi, float* refresh_rate)
{
#if defined(USE_X11)
if (wi.type == WindowInfo::Type::X11)
return GetRefreshRateFromXRandR(wi, refresh_rate);
#endif
return false;
}
#endif
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