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Only change video mode if the current video mode matches one of the preferences.

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This avoids the program resetting the video mode if you're doing something like testing different resolutions or playing a game in fullscreen.
This commit is contained in:
Mina Brown
2025-08-09 13:14:10 -04:00
parent 4b46eafd35
commit 6a586dedb7
1 changed files with 18 additions and 10 deletions
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28
WinPowerDMS/WinPowerDMS.c
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@ -168,6 +168,16 @@ static BOOL LoadPrefs(void) {
else return FALSE;
}
static DISPLAY_MODE GetCurrentDisplayMode(void) {
DEVMODE currentMode = { .dmSize = sizeof(currentMode) };
EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &currentMode);
return (DISPLAY_MODE) {
.width = currentMode.dmPelsWidth,
.height = currentMode.dmPelsHeight,
.refresh = currentMode.dmDisplayFrequency
};
}
static INT_PTR CALLBACK PrefsDialogProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) {
switch (message) {
case WM_INITDIALOG: {
@ -284,8 +294,12 @@ static LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM l
case WM_POWERBROADCAST:
if (LOWORD(wParam) == PBT_POWERSETTINGCHANGE) {
OutputDebugString(L"Power status changed\n");
DISPLAY_MODE currentMode = GetCurrentDisplayMode();
SYSTEM_POWER_STATUS powerStatus;
if (GetSystemPowerStatus(&powerStatus)) {
// Change display mode only if there is a battery present and the current display mode is one of the configured options.
if (GetSystemPowerStatus(&powerStatus) && powerStatus.BatteryFlag != 128 &&
(DisplayModeEquals(&currentMode, &userPrefs.modeBatt) || DisplayModeEquals(&currentMode, &userPrefs.modeAC)))
{
ChangeDisplayMode(powerStatus.ACLineStatus ? &userPrefs.modeAC : &userPrefs.modeBatt, CDS_UPDATEREGISTRY);
}
}
@ -296,15 +310,9 @@ static LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM l
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
if (!LoadPrefs()) { // set both battery and AC to current display mode if there are no preferences set
DEVMODE currentMode = { .dmSize = sizeof(currentMode) };
EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &currentMode);
DISPLAY_MODE mode = {
.width = currentMode.dmPelsWidth,
.height = currentMode.dmPelsHeight,
.refresh = currentMode.dmDisplayFrequency
};
userPrefs.modeAC = mode;
userPrefs.modeBatt = mode;
DISPLAY_MODE currentMode = GetCurrentDisplayMode();
userPrefs.modeAC = currentMode;
userPrefs.modeBatt = currentMode;
}
InitCommonControls(); // Initialize modern controls