C# ImageSource.Freeze方法代码示例

        private Manager()
        {
            #region Creates Loading Threads
            _loaderThreadForThumbnails = new Thread(new ThreadStart(LoaderThreadThumbnails));
            _loaderThreadForThumbnails.IsBackground = true;  // otherwise, the app won't quit with the UI...
            _loaderThreadForThumbnails.Priority = ThreadPriority.BelowNormal;
            _loaderThreadForThumbnails.Start();

            _loaderThreadForNormalSize = new Thread(new ThreadStart(LoaderThreadNormalSize));
            _loaderThreadForNormalSize.IsBackground = true;  // otherwise, the app won't quit with the UI...
            _loaderThreadForNormalSize.Priority = ThreadPriority.BelowNormal;
            _loaderThreadForNormalSize.Start();
            #endregion

            #region Loading Images from Resources
            ResourceDictionary resourceDictionary = new ResourceDictionary();
            resourceDictionary.Source = new Uri("WordsLive;component/Utils/ImageLoader/Resources.xaml", UriKind.Relative);
            _loadingImage = resourceDictionary["ImageLoading"] as DrawingImage;
            _loadingImage.Freeze();
            _errorThumbnail = resourceDictionary["ImageError"] as DrawingImage;
            _errorThumbnail.Freeze();
            #endregion

            # region Create Loading Animation
            ScaleTransform scaleTransform = new ScaleTransform(0.5, 0.5);
            SkewTransform skewTransform = new SkewTransform(0, 0);
            RotateTransform rotateTransform = new RotateTransform(0);
            TranslateTransform translateTransform = new TranslateTransform(0, 0);

            TransformGroup group = new TransformGroup();
            group.Children.Add(scaleTransform);
            group.Children.Add(skewTransform);
            group.Children.Add(rotateTransform);
            group.Children.Add(translateTransform);

            DoubleAnimation doubleAnimation = new DoubleAnimation(0, 359, new TimeSpan(0, 0, 0, 1));
            doubleAnimation.RepeatBehavior = RepeatBehavior.Forever;

            rotateTransform.BeginAnimation(RotateTransform.AngleProperty, doubleAnimation);

            _loadingAnimationTransform = group;
            #endregion
        }

		static ShadowWindow()
		{
			//加载阴影图片
			ActiveTopLeftImage = new BitmapImage(GetImageUri("ACTIVESHADOWTOPLEFT.png"));
			ActiveTopImage = new BitmapImage(GetImageUri("ACTIVESHADOWTOP.png"));
			ActiveTopRightImage = new BitmapImage(GetImageUri("ACTIVESHADOWTOPRIGHT.png"));
			ActiveLeftImage = new BitmapImage(GetImageUri("ACTIVESHADOWLEFT.png"));
			ActiveRightImage = new BitmapImage(GetImageUri("ACTIVESHADOWRIGHT.png"));
			ActiveBottomLeftImage = new BitmapImage(GetImageUri("ACTIVESHADOWBOTTOMLEFT.png"));
			ActiveBottomImage = new BitmapImage(GetImageUri("ACTIVESHADOWBOTTOM.png"));
			ActiveBottomRightImage = new BitmapImage(GetImageUri("ACTIVESHADOWBOTTOMRIGHT.png"));

			InactiveTopLeftImage = new BitmapImage(GetImageUri("INACTIVESHADOWTOPLEFT.png"));
			InactiveTopImage = new BitmapImage(GetImageUri("INACTIVESHADOWTOP.png"));
			InactiveTopRightImage = new BitmapImage(GetImageUri("INACTIVESHADOWTOPRIGHT.png"));
			InactiveLeftImage = new BitmapImage(GetImageUri("INACTIVESHADOWLEFT.png"));
			InactiveRightImage = new BitmapImage(GetImageUri("INACTIVESHADOWRIGHT.png"));
			InactiveBottomLeftImage = new BitmapImage(GetImageUri("INACTIVESHADOWBOTTOMLEFT.png"));
			InactiveBottomImage = new BitmapImage(GetImageUri("INACTIVESHADOWBOTTOM.png"));
			InactiveBottomRightImage = new BitmapImage(GetImageUri("INACTIVESHADOWBOTTOMRIGHT.png"));

			//冻结阴影图像，以便图像重复使用
			ActiveTopLeftImage.Freeze();
			ActiveTopImage.Freeze();
			ActiveTopRightImage.Freeze();
			ActiveLeftImage.Freeze();
			ActiveRightImage.Freeze();
			ActiveBottomLeftImage.Freeze();
			ActiveBottomImage.Freeze();
			ActiveBottomRightImage.Freeze();

			InactiveTopLeftImage.Freeze();
			InactiveTopImage.Freeze();
			InactiveTopRightImage.Freeze();
			InactiveLeftImage.Freeze();
			InactiveRightImage.Freeze();
			InactiveBottomLeftImage.Freeze();
			InactiveBottomImage.Freeze();
			InactiveBottomRightImage.Freeze();
		}

        void SetBackgroundColor(ImageSource img)
        {
            if (img != null)
            {
                img.Freeze();

                if (backgroundcolor_THREAD != null) backgroundcolor_THREAD.Abort();

                backgroundcolor_THREAD = new Thread(new ParameterizedThreadStart(SetBackgroundColor_Worker));
                backgroundcolor_THREAD.Start(img);
            }
        }

        private void initialize(int sensorIdx)
        {
            Enabled = true;

            cameraService = SpringUtil.getService<ICameraService>();
            sensorService = SpringUtil.getService<ISensorService>();
            skeletonService = SpringUtil.getService<ISkeletonService>();
            gestureService = SpringUtil.getService<IGestureService>();

            sensorService.startSensor(sensorIdx);
            cameraService.startCameraService(sensorService.getSensor(sensorIdx));
            skeletonService.enableSkeleton(sensorService.getSensor(sensorIdx));
            gestureService.enableGestureService(sensorService.getSensor(sensorIdx));

            imgHandLeft = new BitmapImage(new Uri(Application.Current.StartupUri, IMAGE_HAND_LEFT));
            imgHandRight = new BitmapImage(new Uri(Application.Current.StartupUri, IMAGE_HAND_RIGHT));
            imgHandLeftActive = new BitmapImage(new Uri(Application.Current.StartupUri, IMAGE_HAND_LEFT_ACTIVE));
            imgHandRightActive = new BitmapImage(new Uri(Application.Current.StartupUri, IMAGE_HAND_RIGHT_ACTIVE));

            imgHandLeft.Freeze();
            imgHandRight.Freeze();
            imgHandLeftActive.Freeze();
            imgHandRightActive.Freeze();
        }

        void SetBackgroundColor(ImageSource img)
        {
            if (img != null)
            {
                img.Freeze();

                ThreadPool.QueueUserWorkItem(new WaitCallback(SetBackgroundColor_Worker), img);
            }
        }

        /// <summary>
        /// Setta il colore usato dall'evidenziatore.
        /// </summary>
        private static void SetColor()
        {
            // Create the pen and brush to color the box behind the a's
            Brush myBrush = null;
            if (AlmaStyleFixPackage.Page == null)
            {
                myBrush = new SolidColorBrush(Color.FromArgb(0x20, 0x00, 0x00, 0xff));
            }
            else
            {
                myBrush = new SolidColorBrush(Color.FromArgb(
                    Convert.ToByte(AlmaStyleFixPackage.Page.A),
                    Convert.ToByte(AlmaStyleFixPackage.Page.R),
                    Convert.ToByte(AlmaStyleFixPackage.Page.G),
                    Convert.ToByte(AlmaStyleFixPackage.Page.B)));
            }

            // myBrush.Freeze();
            Brush penBrush = new SolidColorBrush(Colors.Red);
            penBrush.Freeze();
            Pen myPen = new Pen(penBrush, 0.5);
            myPen.Freeze();

            // draw a square with the created brush and pen
            System.Windows.Rect r = new System.Windows.Rect(0, 0, 5, 5);
            Geometry g = new RectangleGeometry(r);
            GeometryDrawing drawing = new GeometryDrawing(myBrush, myPen, g);
            drawing.Freeze();

            image = new DrawingImage(drawing);
            image.Freeze();
        }