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Reduce refresh rate checks.

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These turned out to be unexpectedly expensive, so cache the value and
also try to check it a bit less.
This commit is contained in:
Henrik Rydgård 2023-10-03 01:06:07 +02:00
parent 008055d242
commit e39980fc73
2 changed files with 18 additions and 13 deletions
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3
Core/Core.cpp
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@ -207,8 +207,6 @@ void UpdateRunLoop(GraphicsContext *ctx) {
// Note: not used on Android.
void Core_RunLoop(GraphicsContext *ctx) {
float refreshRate = System_GetPropertyFloat(SYSPROP_DISPLAY_REFRESH_RATE);
if (windowHidden && g_Config.bPauseWhenMinimized) {
sleep_ms(16);
return;
@ -224,6 +222,7 @@ void Core_RunLoop(GraphicsContext *ctx) {
NativeFrame(ctx);
if (menuThrottle) {
float refreshRate = System_GetPropertyFloat(SYSPROP_DISPLAY_REFRESH_RATE);
// Simple throttling to not burn the GPU in the menu.
// TODO: This should move into NativeFrame. Also, it's only necessary in MAILBOX or IMMEDIATE presentation modes.
double diffTime = time_now_d() - startTime;

28
Windows/main.cpp
View file

@ -283,22 +283,28 @@ static int ScreenDPI() {
#endif
static int ScreenRefreshRateHz() {
DEVMODE lpDevMode;
memset(&lpDevMode, 0, sizeof(DEVMODE));
lpDevMode.dmSize = sizeof(DEVMODE);
lpDevMode.dmDriverExtra = 0;
static int rate = 0;
static double lastCheck = 0.0;
double now = time_now_d();
if (!rate || lastCheck < now - 10.0) {
lastCheck = now;
DEVMODE lpDevMode{};
lpDevMode.dmSize = sizeof(DEVMODE);
lpDevMode.dmDriverExtra = 0;
// TODO: Use QueryDisplayConfig instead (Win7+) so we can get fractional refresh rates correctly.
// TODO: Use QueryDisplayConfig instead (Win7+) so we can get fractional refresh rates correctly.
if (EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &lpDevMode) == 0) {
return 60; // default value
} else {
if (lpDevMode.dmFields & DM_DISPLAYFREQUENCY) {
return lpDevMode.dmDisplayFrequency > 60 ? lpDevMode.dmDisplayFrequency : 60;
if (EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &lpDevMode) == 0) {
rate = 60; // default value
} else {
return 60;
if (lpDevMode.dmFields & DM_DISPLAYFREQUENCY) {
rate = lpDevMode.dmDisplayFrequency > 60 ? lpDevMode.dmDisplayFrequency : 60;
} else {
rate = 60;
}
}
}
return rate;
}
int System_GetPropertyInt(SystemProperty prop) {