protected async override void OnNavigatedFrom(NavigationEventArgs e)
{
await Task.Run(() =>
{
Cancellation.Cancel();
ExitLocker.WaitOne();
ExitLocker.Dispose();
ExitLocker = null;
Cancellation.Dispose();
Cancellation = null;
});
Windows.ApplicationModel.Core.CoreApplication.LeavingBackground -= CoreApplication_LeavingBackground;
Windows.ApplicationModel.Core.CoreApplication.EnteredBackground -= CoreApplication_EnteredBackground;
if (Capture != null)
{
await Capture.ClearEffectsAsync(MediaStreamType.VideoPreview);
if (Capture.CameraStreamState == Windows.Media.Devices.CameraStreamState.Streaming)
{
await Capture.StopPreviewAsync();
}
Capture = null;
}
MediaCaptureProvider.Dispose();
CaptureControl.Source = null;
CosmeticsList.Clear();
CosmeticsList = null;
StayAwake.RequestRelease();
StayAwake = null;
}
private async void CoreApplication_EnteredBackground(object sender, EnteredBackgroundEventArgs e)
{
var Deferral = e.GetDeferral();
await Capture.ClearEffectsAsync(MediaStreamType.VideoPreview);
await Capture.StopPreviewAsync();
Capture = null;
MediaCaptureProvider.Dispose();
CaptureControl.Source = null;
StayAwake.RequestRelease();
Deferral.Complete();
}
private async void CoreApplication_LeavingBackground(object sender, LeavingBackgroundEventArgs e)
{
var Deferral = e.GetDeferral();
if (ApplicationData.Current.LocalSettings.Values["LastSelectedCameraSource"] is string LastSelectedCameraSource)
{
var MediaFraSourceGroup = await MediaFrameSourceGroup.FindAllAsync();
foreach (var FrameSource in from MediaFrameSourceGroup FrameSource in MediaFraSourceGroup
where FrameSource.DisplayName == LastSelectedCameraSource
select FrameSource)
{
CaptureControl.Source = Capture = await MediaCaptureProvider.SetFrameSourceAndInitializeCaptureAsync(FrameSource);
break;
}
}
else
{
CaptureControl.Source = Capture = await MediaCaptureProvider.SetFrameSourceAndInitializeCaptureAsync();
}
ApplicationData.Current.LocalSettings.Values["ReturnCosmeticsEffectExcution"] = true;
VideoEffectDefinition EffectDefinition = new VideoEffectDefinition("CosmeticsEffect.CosmeticsVideoEffect");
ApplicationData.Current.LocalSettings.Values["ReturnCosmeticsEffectExcution"] = false;
VideoEffect = await Capture.AddVideoEffectAsync(EffectDefinition, MediaStreamType.VideoPreview);
CaptureControl.Source = Capture;
await Capture.StartPreviewAsync();
VideoEffect.SetProperties(new PropertySet()
{
{ "LipColor", (CosmeticsControl.SelectedItem as CosmeticsItem).LipColor }
});
StayAwake.RequestActive();
Deferral.Complete();
}
private async void Cosmetics_Loaded(object sender, RoutedEventArgs e)
{
ExitLocker = new AutoResetEvent(false);
CosmeticsList = new ObservableCollection <CosmeticsItem>();
Cancellation = new CancellationTokenSource();
CosmeticsControl.ItemsSource = CosmeticsList;
//以下为加载美妆图片和信息的过程
StorageFolder LipFolder = await(await Package.Current.InstalledLocation.GetFolderAsync("Cosmetics")).GetFolderAsync("LipLogo");
var LipLogo = await LipFolder.GetFilesAsync();
for (int i = 0; i < LipLogo.Count; i++)
{
Color LipColor = Colors.Red;
string Describe = string.Empty;
switch (LipLogo[i].DisplayName)
{
case "Dior": LipColor = Color.FromArgb(1, 100, 0, 30); Describe = "法国著名时尚消费品牌"; break;
case "CHANEL": LipColor = Color.FromArgb(1, 70, 0, 0); Describe = "法国著名奢侈品品牌"; break;
case "GIVENCHY": LipColor = Color.FromArgb(1, 100, 30, 30); Describe = "法国著名时尚消费品牌"; break;
case "M.A.C": LipColor = Color.FromArgb(1, 50, 0, 50); Describe = "美国著名化妆品品牌"; break;
case "LANCOME": LipColor = Color.FromArgb(1, 100, 0, 0); Describe = "法国著名化妆品品牌"; break;
}
CosmeticsList.Add(new CosmeticsItem(new Uri("ms-appx:///Cosmetics/LipLogo/" + LipLogo[i].Name), LipLogo[i].DisplayName, Describe, LipColor));
}
//读取设置模块中指定的摄像头，并设置为当前使用的摄像头
if (ApplicationData.Current.LocalSettings.Values["LastSelectedCameraSource"] is string LastSelectedCameraSource)
{
var MediaFraSourceGroup = await MediaFrameSourceGroup.FindAllAsync();
foreach (var FrameSource in from MediaFrameSourceGroup FrameSource in MediaFraSourceGroup
where FrameSource.DisplayName == LastSelectedCameraSource
select FrameSource)
{
CaptureControl.Source = Capture = await MediaCaptureProvider.SetFrameSourceAndInitializeCaptureAsync(FrameSource);
break;
}
}
else
{
CaptureControl.Source = Capture = await MediaCaptureProvider.SetFrameSourceAndInitializeCaptureAsync();
}
if (Capture != null)
{
await Task.Run(async() =>
{
ApplicationData.Current.LocalSettings.Values["ReturnCosmeticsEffectExcution"] = true;
VideoEffectDefinition EffectDefinition = new VideoEffectDefinition("CosmeticsEffect.CosmeticsVideoEffect");
ApplicationData.Current.LocalSettings.Values["ReturnCosmeticsEffectExcution"] = false;
VideoEffect = await Capture.AddVideoEffectAsync(EffectDefinition, MediaStreamType.VideoPreview);
});
if (!Cancellation.IsCancellationRequested)
{
await Capture.StartPreviewAsync();
CosmeticsControl.SelectedIndex = 0;
LoadingControl.IsLoading = false;
}
}
else
{
ContentDialog dialog = new ContentDialog
{
Title = "错误",
Content = "无可用的摄像头设备或设备异常，请检查摄像头连接",
CloseButtonText = "返回",
Background = Application.Current.Resources["DialogAcrylicBrush"] as Brush
};
_ = await dialog.ShowAsync();
if (MainPage.ThisPage.NavFrame.CanGoBack)
{
MainPage.ThisPage.NavFrame.GoBack();
}
}
StayAwake = new DisplayRequest();
StayAwake.RequestActive();
ExitLocker.Set();
}
