C# TransformedBitmap.BeginInit方法代码示例

      public void PageLoaded(object sender, RoutedEventArgs args)
      {
         // Create Image element.
         Image rotated90 = new Image();
         rotated90.Width = 150;

         // Create the TransformedBitmap to use as the Image source.
         TransformedBitmap tb = new TransformedBitmap();

         // Create the source to use as the tb source.
         BitmapImage bi = new BitmapImage();
         bi.BeginInit();
         bi.UriSource = new Uri(@"sampleImages/watermelon.jpg", UriKind.RelativeOrAbsolute);
         bi.EndInit();

         // Properties must be set between BeginInit and EndInit calls.
         tb.BeginInit();
         tb.Source = bi;
         // Set image rotation.
         RotateTransform transform = new RotateTransform(90);
         tb.Transform = transform;
         tb.EndInit();
         // Set the Image source.
         rotated90.Source = tb;

         //Add Image to the UI
         Grid.SetColumn(rotated90, 1);
         Grid.SetRow(rotated90, 1);
         transformedGrid.Children.Add(rotated90);

      }

        private void buttonRotate_Click(object sender, RoutedEventArgs e)
        {
            TransformedBitmap tb = new TransformedBitmap();
            tb.BeginInit();
            tb.Transform = new RotateTransform(90);
            tb.Source = this.imageViewModel.LoadedBitmap;
            tb.EndInit();
            this.imageViewModel.LoadedBitmap = tb;

            this.imageViewModel.ClearPositions();
        }

        public ShowMyFace()
        {
            Title = "Show My Face";

            ///******************************************************************
            //  3���� ShowMyFace ����
            //******************************************************************/
            Uri uri = new Uri("http://www.charlespetzold.com/PetzoldTattoo.jpg");
            //BitmapImage bitmap = new BitmapImage(uri);
            //Image img = new Image();
            //img.Source = bitmap;
            //Content = img;

            ///******************************************************************
            //  p1245 BitmapImage �ڵ�
            //******************************************************************/
            Image rotated90 = new Image();
            TransformedBitmap tb = new TransformedBitmap();
            FormatConvertedBitmap fb = new FormatConvertedBitmap();
            CroppedBitmap cb = new CroppedBitmap();

            // Create the source to use as the tb source.
            BitmapImage bi = new BitmapImage();
            bi.BeginInit();
            bi.UriSource = uri;
            bi.EndInit();

            //cb.BeginInit();
            //cb.Source = bi;
            //Int32Rect rect = new Int32Rect();
            //rect.X = 220;
            //rect.Y = 200;
            //rect.Width = 120;
            //rect.Height = 80;
            //cb.SourceRect = rect;

            //cb.EndInit();

            fb.BeginInit();
            fb.Source = bi;
            fb.DestinationFormat = PixelFormats.Gray2;
            fb.EndInit();

            // Properties must be set between BeginInit and EndInit calls.
            tb.BeginInit();
            tb.Source = fb;
            // Set image rotation.
            tb.Transform = new RotateTransform(90);
            tb.EndInit();
            // Set the Image source.
            rotated90.Source = tb;
            Content = rotated90;
        }

        public ScannedImagesModel RotateImage( int rotate )
        {
            var bitmap = GetBitmapImage();

            var rotated = new TransformedBitmap();
            rotated.BeginInit();
            rotated.Source = bitmap;
            var transform = new RotateTransform( rotate );
            rotated.Transform = transform;
            rotated.EndInit();

            // get temporary file
            var filename = PathUtility.GetTempFileName();
            var landscape = ( rotate == 90 || rotate == 270 ) ? !Landscape : Landscape;

            SaveImage( rotated, filename );

            return new ScannedImagesModel( filename, landscape );
        }

        private void handleFrameFn(object sender, FrameReadyEventArgs e)
        {
            //    Int32Rect cropRect = new Int32Rect(400, 380, 300, 200);
            //    BitmapSource croppedImage = new CroppedBitmap(e.BitmapImage, cropRect);
            //    image4.Source = croppedImage;

            if (_rotationAngle != 0)
            {
                TransformedBitmap tmpImage = new TransformedBitmap();

                tmpImage.BeginInit();
                tmpImage.Source = e.BitmapImage; // of type BitmapImage

                RotateTransform transform = new RotateTransform(_rotationAngle);
                tmpImage.Transform = transform;
                tmpImage.EndInit();

                _dispImage.Source = tmpImage;
            }
            else
            {
                _dispImage.Source = e.BitmapImage;
            }
        }

 private TransformedBitmap getTransformedBitmap(BitmapImage bi, double angle)
 {
     TransformedBitmap tb = new TransformedBitmap();
     tb.BeginInit();
     tb.Source = bi;
     tb.Transform = new RotateTransform(angle);
     tb.EndInit();
     return tb;
 }

		/// <summary>
		/// Resize BitmapSource and reflect Exif orientation to BitmapSource.
		/// </summary>
		/// <param name="bitmapSource">Source BitmapSource</param>
		/// <param name="outerSize">Target outer size</param>
		/// <param name="orientation">Exif orientation</param>
		/// <returns>Outcome BitmapSource</returns>
		private static BitmapSource ResizeAndReflectExifOrientation(BitmapSource bitmapSource, Size outerSize, int orientation)
		{
			var transform = new TransformGroup();
			var centerX = bitmapSource.Width / 2D;
			var centerY = bitmapSource.Height / 2D;
			bool isRotatedRightAngle = false;

			// Reflect Exif orientation.
			switch (orientation)
			{
				case 0: // Invalid
				case 1: // Horizontal (normal)
					break;

				case 2: // Mirror horizontal
					transform.Children.Add(new ScaleTransform(-1, 1, centerX, centerY));
					break;
				case 3: // Rotate 180 clockwise
					transform.Children.Add(new RotateTransform(180D, centerX, centerY));
					break;
				case 4: // Mirror vertical
					transform.Children.Add(new ScaleTransform(1, -1, centerX, centerY));
					break;
				case 5: // Mirror horizontal and rotate 270 clockwise
					transform.Children.Add(new ScaleTransform(-1, 1, centerX, centerY));
					transform.Children.Add(new RotateTransform(270D, centerX, centerY));
					isRotatedRightAngle = true;
					break;
				case 6: // Rotate 90 clockwise
					transform.Children.Add(new RotateTransform(90D, centerX, centerY));
					isRotatedRightAngle = true;
					break;
				case 7: // Mirror horizontal and rotate 90 clockwise
					transform.Children.Add(new ScaleTransform(-1, 1, centerX, centerY));
					transform.Children.Add(new RotateTransform(90D, centerX, centerY));
					isRotatedRightAngle = true;
					break;
				case 8: // Rotate 270 clockwise
					transform.Children.Add(new RotateTransform(270D, centerX, centerY));
					isRotatedRightAngle = true;
					break;
			}

			// Resize.
			if ((0 < bitmapSource.Width) && (0 < bitmapSource.Height)) // For just in case
			{
				var factor = new[]
					{
						(outerSize.Width / (isRotatedRightAngle ? bitmapSource.Height : bitmapSource.Width)), // Scale factor of X
						(outerSize.Height / (isRotatedRightAngle ? bitmapSource.Width : bitmapSource.Height)) // Scale factor of Y
					}
					.Where(x => 0 < x)
					.DefaultIfEmpty(1D)
					.Min();

				transform.Children.Add(new ScaleTransform(factor, factor, centerX, centerY));
			}

			var bitmapTransformed = new TransformedBitmap();
			bitmapTransformed.BeginInit();
			bitmapTransformed.Transform = transform;
			bitmapTransformed.Source = bitmapSource;
			bitmapTransformed.EndInit();

			return bitmapTransformed;
		}

        /// <summary>
        /// Scales down and rotates a Wpf bitmap.
        /// </summary>
        /// <param name="sourceWpf">Original Wpf bitmap</param>
        /// <param name="scale">Uniform scaling factor</param>
        /// <param name="angle">Rotation angle</param>
        /// <returns>Scaled and rotated Wpf bitmap</returns>
        private static BitmapSource ScaleDownRotateBitmap(BitmapSource sourceWpf, double scale, int angle)
        {
            if (angle % 90 != 0)
            {
                throw new ArgumentException("Rotation angle should be a multiple of 90 degrees.", "angle");
            }

            // Do not upscale and no rotation.
            if ((float)scale >= 1.0f && angle == 0)
            {
                return sourceWpf;
            }

            // Set up the transformed thumbnail
            TransformedBitmap thumbWpf = new TransformedBitmap();
            thumbWpf.BeginInit();
            thumbWpf.Source = sourceWpf;
            TransformGroup transform = new TransformGroup();

            // Rotation
            if (Math.Abs(angle) % 360 != 0)
                transform.Children.Add(new RotateTransform(Math.Abs(angle)));

            // Scale
            if ((float)scale < 1.0f || angle < 0) // Only downscale
            {
                double xScale = Math.Min(1.0, Math.Max(1.0 / (double)sourceWpf.PixelWidth, scale));
                double yScale = Math.Min(1.0, Math.Max(1.0 / (double)sourceWpf.PixelHeight, scale));

                if (angle < 0)
                    xScale = -xScale;
                transform.Children.Add(new ScaleTransform(xScale, yScale));
            }

            // Apply the tranformation
            thumbWpf.Transform = transform;
            thumbWpf.EndInit();

            return thumbWpf;
        }

		private static TransformedBitmap CreateTransformedBitmap(BitmapSource source, VCProfile profile)
		{
			var transformedBitmap = new TransformedBitmap();
			transformedBitmap.BeginInit();
			transformedBitmap.Source = source;
			var transformGroup = new TransformGroup();
			transformGroup.Children.Add(new ScaleTransform(profile.FlipHorizontal ? -1 : 1, profile.FlipVertical ? -1 : 1));
			transformGroup.Children.Add(new RotateTransform(ConvertRotationToDegrees(profile.Rotation)));
			transformedBitmap.Transform = transformGroup;
			transformedBitmap.EndInit();
			transformedBitmap.Freeze();

			return transformedBitmap;
		}

        private ImageSource GetBitmapSource(LoadImageRequest loadTask, DisplayOptions loadType)
        {
            DisplayOptions lt = loadType;
            Image image = loadTask.Image;
            string source = loadTask.Source;
            string nSource = source;
            string cacheFile = Path.Combine(AppStateSettings.CacheFolder, "Media", nSource.GetSHA1Hash().ToString() + "s" + loadTask.CachHeight + ".png"); // REVIEW TODO: Used Path instead of String concat.

            if (File.Exists(cacheFile))
            {
                nSource = cacheFile;
                lt = DisplayOptions.FullResolution;
                //return new BitmapImage(new Uri("file://" + cacheFile));
            }

            ImageSource imageSource = null;

            if (!string.IsNullOrWhiteSpace(nSource))
            {
                Stream imageStream = null;

                SourceType sourceType = SourceType.LocalDisk;

                image.Dispatcher.Invoke(new ThreadStart(delegate
                {
                    sourceType = Loader.GetSourceType(image);
                }));


                try
                {
                    if (loadTask.Stream == null)
                    {
                        ILoader loader = LoaderFactory.CreateLoader(sourceType, nSource);
                        imageStream = loader.Load(nSource);
                        loadTask.Stream = imageStream;
                    }
                    else
                    {
                        imageStream = new MemoryStream();
                        loadTask.Stream.Position = 0;
                        loadTask.Stream.CopyTo(imageStream);
                        imageStream.Position = 0;
                    }
                }
                catch (Exception e)
                {
                    Console.WriteLine(e.Message);
                }

                if (imageStream != null)
                {
                    try
                    {
                        if (lt == DisplayOptions.Preview)
                        {
                            BitmapFrame bitmapFrame = BitmapFrame.Create(imageStream);
                            imageSource = bitmapFrame.Thumbnail;

                            if (imageSource == null) // Preview it is not embedded into the file
                            {
                                // we'll make a thumbnail image then ... (too bad as the pre-created one is FAST!)
                                TransformedBitmap thumbnail = new TransformedBitmap();
                                thumbnail.BeginInit();
                                thumbnail.Source = bitmapFrame as BitmapSource;

                                // we'll make a reasonable sized thumnbail with a height of 240
                                int pixelH = bitmapFrame.PixelHeight;
                                int pixelW = bitmapFrame.PixelWidth;
                                int decodeH = (int)loadTask.CachHeight;
                                int decodeW = (bitmapFrame.PixelWidth * decodeH) / pixelH;
                                double scaleX = decodeW / (double)pixelW;
                                double scaleY = decodeH / (double)pixelH;
                                TransformGroup transformGroup = new TransformGroup();
                                transformGroup.Children.Add(new ScaleTransform(scaleX, scaleY));
                                thumbnail.Transform = transformGroup;
                                thumbnail.EndInit();

                                // this will disconnect the stream from the image completely ...
                                WriteableBitmap writable = new WriteableBitmap(thumbnail);


                                BitmapFrame frame = BitmapFrame.Create(writable);
                                var encoder = new PngBitmapEncoder();
                                encoder.Frames.Add(frame);

                                using (var stream = File.Create(cacheFile))
                                {
                                    encoder.Save(stream);
                                }


                                writable.Freeze();
                                imageSource = writable;
                            }
                        }
                        else if (lt == DisplayOptions.FullResolution)
                        {
                            BitmapImage bitmapImage = new BitmapImage();
                            bitmapImage.BeginInit();
//.........这里部分代码省略.........

        private Image initializeProjectileImage(Uri spriteUri, bool rotate = false)
        {
            Image newImage = new Image();

            newImage.VerticalAlignment = System.Windows.VerticalAlignment.Top;
            newImage.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;
            newImage.Margin = getRandomEdge();

            TransformedBitmap temp = new TransformedBitmap();
            BitmapImage bi = new BitmapImage();
            bi.BeginInit();
            bi.UriSource = spriteUri;
            bi.EndInit();
            temp.BeginInit();
            temp.Source = bi;
            RotateTransform transform;
            if (rotate)
            {
                transform = new RotateTransform(rand.Next(0, 3) * 90);
            }
            else
            {
                transform = new RotateTransform(0);
            }
            temp.Transform = transform;
            temp.EndInit();
            newImage.Source = temp;

            return newImage;
        }

		private byte[] Resize(byte[] bytes, int? width, int? height, int qualityLevel)
		{
			if (bytes == null)
				throw new Exception("Bytes parameter is null.");
			var image = new BitmapImage();
			image.BeginInit();
			if (width.HasValue)
				image.DecodePixelWidth = width.Value;
			if (height.HasValue)
				image.DecodePixelHeight = height.Value;
			image.StreamSource = new MemoryStream(bytes);
			image.CreateOptions = BitmapCreateOptions.IgnoreColorProfile;
			image.EndInit();
			var transform = new TransformedBitmap();
			transform.BeginInit();
			transform.Source = image;
			transform.EndInit();
			return ToJpegBytes(transform, qualityLevel);
		}

		private void RotateButton_OnClick (object sender, RoutedEventArgs e)
			{
			TransformedBitmap RotatedSource = new TransformedBitmap();
			RotatedSource.BeginInit ();
			RotatedSource.Source = Source;
			RotatedSource.Transform = new RotateTransform (90);
			RotatedSource.EndInit ();
			Source = RotatedSource;
			advancedContentPresenter.Background = new ImageBrush(Source);
			advancedContentPresenter.FitToBackgroundImage ();
			}

//.........这里部分代码省略.........
     else
     {
       int width = aThumbWidth;
       int height = aThumbHeight;
       double num3 = (double)bitmap1.Width / (double)bitmap1.Height;
       if (bitmap1.Width > bitmap1.Height)
         height = (int)Math.Floor((double)width / num3);
       else
         width = (int)Math.Floor(num3 * (double)height);
       try
       {
         GrabUtil.FileDelete(thumbnailImageDest);
       }
       catch (Exception ex)
       {
         Log.Error("Picture: Error deleting old thumbnail - {0}", (object)ex.Message);
       }
       bitmap2 = new Bitmap((Image)bitmap1, width, height);
       bitmap2.Save(thumbnailImageDest, Thumbs.ThumbCodecInfo, Thumbs.ThumbEncoderParams);
       File.SetAttributes(thumbnailImageDest, File.GetAttributes(thumbnailImageDest) | FileAttributes.Hidden);
       flag = true;
     }
       }
     }
     else
     {
       BitmapMetadata meta = bitmapFrame.Metadata as BitmapMetadata;
       bitmapSource = bitmapFrame.Thumbnail;
       if (autocreateLargeThumbs)
       {
     if (bitmapSource != null)
     {
       transformedBitmap = new TransformedBitmap();
       transformedBitmap.BeginInit();
       transformedBitmap.Source = (BitmapSource)bitmapFrame;
       int pixelHeight = bitmapFrame.PixelHeight;
       int pixelWidth = bitmapFrame.PixelWidth;
       int num3 = bitmapFrame.PixelHeight * num2 / pixelWidth;
       double scaleX = (double)num2 / (double)pixelWidth;
       double scaleY = (double)num3 / (double)pixelHeight;
       transformGroup = new TransformGroup();
       transformGroup.Children.Add((Transform)new ScaleTransform(scaleX, scaleY));
       transformedBitmap.Transform = (Transform)transformGroup;
       transformedBitmap.EndInit();
       bitmapSource = (BitmapSource)transformedBitmap;
       bitmapSource = Picture.MetaOrientation(meta, bitmapSource);
       flag = Picture.BitmapFromSource(bitmapSource, thumbnailImageDest);
     }
       }
       else if (bitmapSource != null)
       {
     bitmapSource = Picture.MetaOrientation(meta, bitmapSource);
     flag = Picture.BitmapFromSource(bitmapSource, thumbnailImageDest);
       }
     }
       }
       catch (Exception ex1)
       {
     try
     {
       try
       {
     using (FileStream fileStream = new FileStream(thumbnailImageSource, FileMode.Open, FileAccess.Read))
     {
       using (aDrawingImage = Image.FromStream((Stream)fileStream, true, false))
         flag = Picture.CreateThumbnail(aDrawingImage, thumbnailImageDest, aThumbWidth, aThumbHeight, iRotate, aFastMode);

        public static BitmapSource Transform(BitmapSource source, Transform transform)
        {
            if (source == null) throw new ArgumentNullException("source");
            if (transform == null) throw new ArgumentNullException("transform");

            TransformedBitmap target = new TransformedBitmap();
            target.BeginInit();
            target.Source = source;
            target.Transform = transform;
            target.EndInit();
            target.Freeze();

            return CloneImage(target);
        }