BitmapSource. copypixels ->byte[]->BitmapSource如何做到这一点简单

Question

如何在c#中有效地将BitmapSource转换为byte[]，反之亦然?

Answer 1

BitmapSource to byte[]:

private byte[] BitmapSourceToArray(BitmapSource bitmapSource)
{
    // Stride = (width) x (bytes per pixel)
    int stride = (int)bitmapSource.PixelWidth * (bitmapSource.Format.BitsPerPixel / 8);
    byte[] pixels = new byte[(int)bitmapSource.PixelHeight * stride];
    bitmapSource.CopyPixels(pixels, stride, 0);
    return pixels;
}

byte[] to BitmapSource:

private BitmapSource BitmapSourceFromArray(byte[] pixels, int width, int height)
{
    WriteableBitmap bitmap = new WriteableBitmap(width, height, 96, 96, PixelFormats.Bgra32, null);
    bitmap.WritePixels(new Int32Rect(0, 0, width, height), pixels, width * (bitmap.Format.BitsPerPixel / 8), 0);
    return bitmap;
}