BitmapSource ConvertTo Bitmap

  偶遇需要把 BitmapSource 转成 Bitmap。 。。

 

using System;

using System.Drawing;

using System.Drawing.Imaging;

using System.Windows;

using System.Windows.Media.Imaging;



namespace Jisons

{

    public static class BitmapSourceHelper

    {



        public static Bitmap ConvertToBitmap(this BitmapSource bs)

        {

            return ConvertToBitmap(bs, 0, 0, bs.PixelWidth, bs.PixelHeight);

        }



        public static Bitmap ConvertToBitmap(this BitmapSource bs, int x, int y, int width, int height)

        {

            var bmp = new Bitmap(width, height, PixelFormat.Format32bppPArgb);

            var bmpdata = bmp.LockBits(new Rectangle(System.Drawing.Point.Empty, bmp.Size), ImageLockMode.WriteOnly, PixelFormat.Format32bppPArgb);

            bs.CopyPixels(new Int32Rect(x, y, width, height), bmpdata.Scan0, bmpdata.Height * bmpdata.Stride, bmpdata.Stride);

            bmp.UnlockBits(bmpdata);

            return bmp;

        }



        public static byte[] ConvertToBytes(this BitmapSource bs)

        {

            return ConvertToBytes(bs, 0, 0, (int)bs.Width, (int)bs.Height);

        }



        public static byte[] ConvertToBytes(this BitmapSource bs, int x, int y, int width, int height)

        {

            var rect = new Int32Rect(x, y, width, height);

            var stride = bs.Format.BitsPerPixel * rect.Width / 8;

            byte[] data = new byte[rect.Height * stride];

            bs.CopyPixels(rect, data, stride, 0);

            return data;

        }



        public static BitmapSource ClipBitmapSource(this BitmapSource bs, int x, int y, int width, int height)

        {

            var rect = new Int32Rect(x, y, width, height);

            var stride = bs.Format.BitsPerPixel * rect.Width / 8;

            byte[] data = new byte[rect.Height * stride];

            bs.CopyPixels(rect, data, stride, 0);

            return BitmapSource.Create(width, height, 0, 0, System.Windows.Media.PixelFormats.Bgra32, null, data, stride);

        }



        public static Bitmap ConvertToBitmap(this byte[] data, int width, int height)

        {

            var bmp = new Bitmap(width, height);

            for (int w = 0; w < width; w++)

            {

                for (int h = 0; h < height; h++)

                {

                    int index = h * width * 4 + w * 4;



                    int B = data[index];

                    int G = data[index + 1];

                    int R = data[index + 2];

                    int A = data[index + 3];



                    bmp.SetPixel(w, h, System.Drawing.Color.FromArgb(A, R, G, B));

                }

            }

            return bmp;

        }



        public static BitmapSource ConvertToBitmapSource(this Bitmap source)

        {

            return System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(source.GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());

        }



    }

}

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