Method ToggleHDR

Source/DX11VideoProcessor.cpp:1675–1740

}

bool CDX11VideoProcessor::ToggleHDR(const DisplayConfig_t& displayConfig, const bool bEnableAdvancedColor)
{
	DLog(L"ToggleHDR() : {} for '{}'", bEnableAdvancedColor, displayConfig.displayName);

	auto GetCurrentDisplayMode = [](LPCWSTR lpszDeviceName) -> std::optional<DEVMODEW> {
		DEVMODEW devmode = {};
		devmode.dmSize = sizeof(DEVMODEW);
		auto ret = EnumDisplaySettingsW(lpszDeviceName, ENUM_CURRENT_SETTINGS, &devmode);
		if (ret) {
			return devmode;
		}

		return {};
	};

	auto beforeModeOpt = GetCurrentDisplayMode(displayConfig.displayName);

	LONG ret = 1;

	if (IsWindows11_24H2OrGreater()) {
		DISPLAYCONFIG_SET_HDR_STATE setHdrState = {};
		setHdrState.header.type = static_cast<DISPLAYCONFIG_DEVICE_INFO_TYPE>(DISPLAYCONFIG_DEVICE_INFO_SET_HDR_STATE);
		setHdrState.header.size = sizeof(setHdrState);
		setHdrState.header.adapterId = displayConfig.modeTarget.adapterId;
		setHdrState.header.id = displayConfig.modeTarget.id;
		setHdrState.enableHdr = bEnableAdvancedColor ? 1 : 0;

		ret = DisplayConfigSetDeviceInfo(&setHdrState.header);
		DLogIf(ERROR_SUCCESS != ret, L"ToggleHDR() : DisplayConfigSetDeviceInfo(DISPLAYCONFIG_SET_HDR_STATE) with '{}' failed with error {}", bEnableAdvancedColor, HR2Str(HRESULT_FROM_WIN32(ret)));
	} else {
		DISPLAYCONFIG_SET_ADVANCED_COLOR_STATE setColorState = {};
		setColorState.header.type = DISPLAYCONFIG_DEVICE_INFO_SET_ADVANCED_COLOR_STATE;
		setColorState.header.size = sizeof(setColorState);
		setColorState.header.adapterId = displayConfig.modeTarget.adapterId;
		setColorState.header.id = displayConfig.modeTarget.id;
		setColorState.enableAdvancedColor = bEnableAdvancedColor ? 1 : 0;

		ret = DisplayConfigSetDeviceInfo(&setColorState.header);
		DLogIf(ERROR_SUCCESS != ret, L"ToggleHDR() : DisplayConfigSetDeviceInfo(DISPLAYCONFIG_SET_ADVANCED_COLOR_STATE) with '{}' failed with error {}", bEnableAdvancedColor, HR2Str(HRESULT_FROM_WIN32(ret)));
	}

	if (ret == ERROR_SUCCESS) {
		m_bDisplayModeChangeAfterHDRToggle = true;

		if (beforeModeOpt.has_value()) {
			auto afterModeOpt = GetCurrentDisplayMode(displayConfig.displayName);
			if (afterModeOpt.has_value()) {
				auto& beforeMode = *beforeModeOpt;
				auto& afterMode = *afterModeOpt;
				if (beforeMode.dmPelsWidth != afterMode.dmPelsWidth || beforeMode.dmPelsHeight != afterMode.dmPelsHeight
						|| beforeMode.dmBitsPerPel != afterMode.dmBitsPerPel || beforeMode.dmDisplayFrequency != afterMode.dmDisplayFrequency) {
					DLog(L"ToggleHDR() : Display mode changed from {}x{}@{} to {}x{}@{}, restoring",
						 beforeMode.dmPelsWidth, beforeMode.dmPelsHeight, beforeMode.dmDisplayFrequency,
						 afterMode.dmPelsWidth, afterMode.dmPelsHeight, afterMode.dmDisplayFrequency);

					auto ret = ChangeDisplaySettingsExW(displayConfig.displayName, &beforeMode, nullptr, CDS_FULLSCREEN, nullptr);
					DLogIf(DISP_CHANGE_SUCCESSFUL != ret, L"ToggleHDR() : ChangeDisplaySettingsExW() failed with error {}", HR2Str(HRESULT_FROM_WIN32(ret)));