C# Imaging.FormatConvertedBitmap类代码示例

        public RgbImageAdapter(string path)
        {
            this.source = new BitmapImage(new Uri(path));

            if (source.Format != PixelFormats.Bgra32)
            {
                source = new FormatConvertedBitmap(source, PixelFormats.Bgra32, null, 0);
            }

            int width = source.PixelWidth;
            int height = source.PixelHeight;
            RgbPixel[,] result = new RgbPixel[height, width];

            byte[] byteArray = new byte[height * width * 4];
            int stride = width * 4;
            source.CopyPixels(byteArray, stride, 0);
            for (int i = 0; i < height; i++)
            {
                for (int j = 0; j < width; j++)
                {
                    result[i, j] = new RgbPixel
                    {
                        Blue = byteArray[(i * width + j) * 4 + 0],
                        Green = byteArray[(i * width + j) * 4 + 1],
                        Red = byteArray[(i * width + j) * 4 + 2],
                        Alpha = byteArray[(i * width + j) * 4 + 3],
                    };
                }
            }

            image = new RgbImage(result);
        }

        private byte[] RenderCurve(
			ref RenderTargetBitmap rtb,
			ref FormatConvertedBitmap fcb,
			int width,
			IEnumerable<IList<Point>> collection,
			double thickness,
			int miterLimit,
			int height,
			int stride)
        {
            if (rtb == null
                || rtb.PixelWidth != width
                || rtb.PixelHeight != height)
            {
                rtb = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);
                fcb = new FormatConvertedBitmap(rtb, DrawingParameter.TargetPixelFormat, DrawingParameter.TargetBitmapPalette, 1);
            }
            else
            {
                rtb.Clear();
            }

            collection
                .Select(it =>
                    {
                        var visual = _drawingVisualFactory();
                        visual.Draw(it, thickness, miterLimit, _logicalToScreenMapperFactory());
                        return visual;
                    })
                .ForEachElement(rtb.Render);

            var curvePixels = new byte[stride * height];
            fcb.CopyPixels(curvePixels, stride, 0);
            return curvePixels;
        }

        public void Button1_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                BitmapImage myBitmapImage = new BitmapImage();
                myBitmapImage.BeginInit();
                myBitmapImage.UriSource = new Uri(@text1.Text);
                myBitmapImage.EndInit();
                FormatConvertedBitmap gray = new FormatConvertedBitmap(myBitmapImage, PixelFormats.Gray4, null, 0);
                myImage.Source = gray;
                var enc = new JpegBitmapEncoder();
                enc.Frames.Add(BitmapFrame.Create(gray));
                using (var s = File.Create("gray.jpg"))
                    enc.Save(s);
            }
            catch
            {
                text1.Text = "Не верно введен путь";
            }

            /* public void Button2_Click(object sender, RoutedEventArgs e)
             {
                 BitmapImage myBitmapImage = new BitmapImage();
                 myBitmapImage.BeginInit();
                 myBitmapImage.UriSource=new Uri(myImage);
                 myBitmapImage.EndInit();
                 var enc = new JpegBitmapEncoder();
                 enc.Frames.Add(BitmapFrame.Create(gray));
                 using (var s = File.Create("gray.jpg"))
                     enc.Save(s);*/
        }

        /// <summary>
        /// Cashes original ImageSource, creates and caches greyscale ImageSource and greyscale opacity mask
        /// </summary>
        private void SetSources()
        {
            _sourceC = Source;

              try
              {
            // create and cache greyscale ImageSource
            _sourceG = new FormatConvertedBitmap(new BitmapImage(new Uri(TypeDescriptor.GetConverter(Source).ConvertTo(Source, typeof(string)) as string)),
                                             PixelFormats.Gray16, null, 0);

            // create Opacity Mask for greyscale image as FormatConvertedBitmap does not keep transparency info
            _opacityMaskG = new ImageBrush(_sourceC);
            _opacityMaskG.Opacity = 0.5;

            this.Source = IsEnabled ? _sourceC : _sourceG;
            this.OpacityMask = IsEnabled ? _opacityMaskC : _opacityMaskG;

            InvalidateProperty(IsEnabledProperty);
              }
              catch
              {
            #if DEBUG
            MessageBox.Show(String.Format("The ImageSource used cannot be greyed out.\nUse BitmapImage or URI as a Source in order to allow greyscaling.\nSource type used: {0}", Source.GetType().Name),
                        "Unsupported Source in GreyableImage", MessageBoxButton.OK, MessageBoxImage.Warning);
            #endif // DEBUG

            // in case greyscale image cannot be created set greyscale source to original Source
            _sourceG = Source;
              }
        }

        public MemoryStream ReduceColorDepth(Bitmap bmp)
        {
            var ms = new MemoryStream();
            bmp.Save(ms, ImageFormat.Png);

            var bi = new BitmapImage();
            bi.BeginInit();
            bi.StreamSource = ms;
            bi.EndInit();

            var newFormatedBitmapSource = new FormatConvertedBitmap();
            newFormatedBitmapSource.BeginInit();

            newFormatedBitmapSource.Source = bi;

            var myPalette = new BitmapPalette(bi, 256);

            newFormatedBitmapSource.DestinationPalette = myPalette;

            //Set PixelFormats
            newFormatedBitmapSource.DestinationFormat = PixelFormats.Indexed8;
            newFormatedBitmapSource.EndInit();

            var pngBitmapEncoder = new PngBitmapEncoder();
            pngBitmapEncoder.Interlace = PngInterlaceOption.Off;
            pngBitmapEncoder.Frames.Add(BitmapFrame.Create(newFormatedBitmapSource));

            var memstream = new MemoryStream();
            pngBitmapEncoder.Save(memstream);
            memstream.Position = 0;
            return memstream;
        }

        public override Stream OpenEntry(ArcFile arc, Entry entry)
        {
            var pent = entry as PnaEntry;
            if (null == pent)
                return base.OpenEntry (arc, entry);
            ImageData image;
            using (var input = arc.File.CreateStream (entry.Offset, entry.Size))
                image = ImageFormat.Read (input);
            var bitmap = image.Bitmap;
            if (bitmap.Format.BitsPerPixel != 32)
            {
                bitmap = new FormatConvertedBitmap (bitmap, PixelFormats.Bgra32, null, 0);
            }
            int stride = bitmap.PixelWidth * 4;
            var pixels = new byte[stride * bitmap.PixelHeight];
            bitmap.CopyPixels (pixels, stride, 0);

            // restore colors premultiplied by alpha
            for (int i = 0; i < pixels.Length; i += 4)
            {
                int alpha = pixels[i+3];
                if (alpha != 0 && alpha != 0xFF)
                {
                    pixels[i]   = (byte)(pixels[i]   * 0xFF / alpha);
                    pixels[i+1] = (byte)(pixels[i+1] * 0xFF / alpha);
                    pixels[i+2] = (byte)(pixels[i+2] * 0xFF / alpha);
                }
            }
            return TgaStream.Create (pent.Info, pixels);
        }

        public static void DrawImage (this ConsoleBuffer @this, ImageSource imageSource, int x, int y, int width, int height)
        {
            var bmp = imageSource as BitmapSource;
            if (bmp == null)
                throw new ArgumentException("Only rendering of bitmap source is supported.");

            @this.OffsetX(ref x).OffsetY(ref y);
            int x1 = x, x2 = x + width, y1 = y, y2 = y + height;
            if ([email protected](ref x1, ref y1, ref x2, ref y2))
                return;

            if (width != bmp.PixelWidth || height != bmp.PixelHeight)
                bmp = new TransformedBitmap(bmp, new ScaleTransform((double)width / bmp.PixelWidth, (double)height / bmp.PixelHeight));
            if (bmp.Format != PixelFormats.Indexed4)
                bmp = new FormatConvertedBitmap(bmp, PixelFormats.Indexed4, BitmapPalettes.Halftone8Transparent, 0.5);

            const int bitsPerPixel = 4;
            int stride = 4 * (bmp.PixelWidth * bitsPerPixel + 31) / 32;
            byte[] bytes = new byte[stride * bmp.PixelHeight];
            bmp.CopyPixels(bytes, stride, 0);

            for (int iy = y1, py = 0; iy < y2; iy++, py++) {
                ConsoleChar[] charsLine = @this.GetLine(iy);
                for (int ix = x1, px = 0; ix < x2; ix++, px++) {
                    int byteIndex = stride * py + px / 2;
                    int bitOffset = px % 2 == 0 ? 4 : 0;
                    SetColor(ref charsLine[ix], bmp.Palette, (bytes[byteIndex] >> bitOffset) & 0xF);
                }
            }
        }

        public static bool[,] Rasterize(Point[] points, int width, int height)
        {
            Contract.Requires(points != null);
            Contract.Requires(width > 0);
            Contract.Requires(height > 0);
            Contract.Requires(width % 8 == 0);
            Contract.Ensures(Contract.Result<bool[,]>() != null);
            Contract.Ensures(Contract.Result<bool[,]>().GetLength(0) == width);
            Contract.Ensures(Contract.Result<bool[,]>().GetLength(1) == height);

            var canvas = new Canvas { Background = Brushes.White, Width = width, Height = height };
            var polygon = new Polygon { Stroke = Brushes.Black, Fill = Brushes.Black, StrokeThickness = 1, Points = new PointCollection(points) };
            canvas.Children.Add(polygon);
            RenderOptions.SetEdgeMode(canvas, EdgeMode.Aliased);

            canvas.Measure(new Size(width, height));
            canvas.Arrange(new Rect(0, 0, canvas.DesiredSize.Width, canvas.DesiredSize.Height));

            var rtb = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Default);
            rtb.Render(canvas);

            var fmb = new FormatConvertedBitmap(rtb, PixelFormats.BlackWhite, null, 0);
            var pixels = new byte[width * height / 8];
            fmb.CopyPixels(pixels, width / 8, 0);

            System.Collections.BitArray ba = new System.Collections.BitArray(pixels);

            var result = new bool[width, height];
            for (int i = 0, y = 0; y < height; ++y)
                for (int x = 0; x < width; ++x, ++i)
                    result[x, y] = !ba[i];

            return result;
        }

 public MyImageReader(string fileName)
 {
     var filePath = Path.Combine(Environment.CurrentDirectory, fileName);
     _bitmap = new FormatConvertedBitmap(new BitmapImage(new Uri("file://" + filePath)), System.Windows.Media.PixelFormats.Bgr32, null, 0);
     _pixels = new uint[_bitmap.PixelHeight * _bitmap.PixelWidth];
     _bitmap.CopyPixels(_pixels, sizeof(uint) * _bitmap.PixelWidth, 0);
 }

        public static System.Drawing.Bitmap setPixelFormat2(BitmapSource bitmapsource, System.Drawing.Imaging.PixelFormat format)
        {
            //convert image format
            var src = new System.Windows.Media.Imaging.FormatConvertedBitmap();
            src.BeginInit();
            src.Source = bitmapsource;
            if (format == System.Drawing.Imaging.PixelFormat.Format1bppIndexed)
            {
                src.DestinationFormat = System.Windows.Media.PixelFormats.BlackWhite;
            }
            if (format == System.Drawing.Imaging.PixelFormat.Format8bppIndexed)
            {
                src.DestinationFormat = System.Windows.Media.PixelFormats.Gray8;
            }
            if (format == System.Drawing.Imaging.PixelFormat.Format24bppRgb)
            {
                src.DestinationFormat = System.Windows.Media.PixelFormats.Bgr24;
            }
            if (format == System.Drawing.Imaging.PixelFormat.Format32bppRgb)
            {
                src.DestinationFormat = System.Windows.Media.PixelFormats.Bgr32;
            }
            src.EndInit();

            //copy to bitmap
            Bitmap bitmap = new Bitmap(src.PixelWidth, src.PixelHeight, format);
            var data = bitmap.LockBits(new Rectangle(Point.Empty, bitmap.Size), System.Drawing.Imaging.ImageLockMode.WriteOnly, format);
            src.CopyPixels(System.Windows.Int32Rect.Empty, data.Scan0, data.Height * data.Stride, data.Stride);
            bitmap.UnlockBits(data);

            return bitmap;
        }

        public static BitmapSource CreateThemedBitmapSource(BitmapSource src, Color bgColor, bool isHighContrast)
        {
            unchecked {
                if (src.Format != PixelFormats.Bgra32)
                    src = new FormatConvertedBitmap(src, PixelFormats.Bgra32, null, 0.0);
                var pixels = new byte[src.PixelWidth * src.PixelHeight * 4];
                src.CopyPixels(pixels, src.PixelWidth * 4, 0);

                var bg = HslColor.FromColor(bgColor);
                int offs = 0;
                while (offs + 4 <= pixels.Length) {
                    var hslColor = HslColor.FromColor(Color.FromRgb(pixels[offs + 2], pixels[offs + 1], pixels[offs]));
                    double hue = hslColor.Hue;
                    double saturation = hslColor.Saturation;
                    double luminosity = hslColor.Luminosity;
                    double n1 = Math.Abs(0.96470588235294119 - luminosity);
                    double n2 = Math.Max(0.0, 1.0 - saturation * 4.0) * Math.Max(0.0, 1.0 - n1 * 4.0);
                    double n3 = Math.Max(0.0, 1.0 - saturation * 4.0);
                    luminosity = TransformLuminosity(hue, saturation, luminosity, bg.Luminosity);
                    hue = hue * (1.0 - n3) + bg.Hue * n3;
                    saturation = saturation * (1.0 - n2) + bg.Saturation * n2;
                    if (isHighContrast)
                        luminosity = ((luminosity <= 0.3) ? 0.0 : ((luminosity >= 0.7) ? 1.0 : ((luminosity - 0.3) / 0.4))) * (1.0 - saturation) + luminosity * saturation;
                    var color = new HslColor(hue, saturation, luminosity, 1.0).ToColor();
                    pixels[offs + 2] = color.R;
                    pixels[offs + 1] = color.G;
                    pixels[offs] = color.B;
                    offs += 4;
                }

                BitmapSource newImage = BitmapSource.Create(src.PixelWidth, src.PixelHeight, src.DpiX, src.DpiY, PixelFormats.Bgra32, src.Palette, pixels, src.PixelWidth * 4);
                newImage.Freeze();
                return newImage;
            }
        }

 /// <summary>
 /// Initializes a new instance of the <see cref="BitmapSourceLuminanceSource"/> class.
 /// </summary>
 /// <param name="bitmap">The bitmap.</param>
 public BitmapSourceLuminanceSource(BitmapSource bitmap)
    : base(bitmap.PixelWidth, bitmap.PixelHeight)
 {
    switch (bitmap.Format.ToString())
    {
       case "Bgr24":
       case "Bgr32":
          CalculateLuminanceBGR(bitmap);
          break;
       case "Bgra32":
          CalculateLuminanceBGRA(bitmap);
          break;
       case "Rgb24":
          CalculateLuminanceRGB(bitmap);
          break;
       case "Bgr565":
          CalculateLuminanceBGR565(bitmap);
          break;
       default:
          // there is no special conversion routine to luminance values
          // we have to convert the image to a supported format
          bitmap = new FormatConvertedBitmap(bitmap, PixelFormats.Bgra32, null, 0);
          CalculateLuminanceBGR(bitmap);
          break;
    }
 }

        internal void SetIcon(string fileName)
        {
            var bitmapSource = new BitmapImage();

            bitmapSource.BeginInit();
            bitmapSource.UriSource = new Uri(fileName);

            // ensure that we resize to the correct dimensions
            bitmapSource.DecodePixelHeight = 46;
            bitmapSource.DecodePixelWidth = 46;

            bitmapSource.EndInit();

            var pbgra32Image = new FormatConvertedBitmap(bitmapSource, System.Windows.Media.PixelFormats.Pbgra32, null, 0);

            var bmp = new System.Windows.Media.Imaging.WriteableBitmap(pbgra32Image);

            var images = new List<BandIcon>() { bmp.ToBandIcon(), bmp.ToBandIcon() };

            Strapp.SetImageList(Strapp.TileId, images, 0);

            _tiles.UpdateStrapp(Strapp);

            // this should refresh all bindings into the Strapp (in particular, the image)
            NotifyPropertyChanged("Strapp");
        }

 public static BitmapImage ConvertToOtherPixelFormat(BitmapSource source, PixelFormat format)
 {
     var newFormatedBitmapSource = new FormatConvertedBitmap();
     newFormatedBitmapSource.BeginInit();
     newFormatedBitmapSource.Source = source;
     newFormatedBitmapSource.DestinationFormat = format;
     newFormatedBitmapSource.EndInit();
     return BitmapSourceToBitmapImage(newFormatedBitmapSource.Source);
 }

        public static FormatConvertedBitmap GetFormatConvertedBitmap(SWM.PixelFormat pf, BitmapSource bs)
        {
            FormatConvertedBitmap newFormatedBitmapSource = new FormatConvertedBitmap();
            newFormatedBitmapSource.BeginInit();
            newFormatedBitmapSource.Source = bs;
            newFormatedBitmapSource.DestinationFormat = pf;
            newFormatedBitmapSource.EndInit();

            return newFormatedBitmapSource;
        }