C# Bitmap 复制

以后再详述，先上代码。

public bool CopyBitmap(Bitmap source, Bitmap destination)
{
    if ((source.Width != destination.Width) || (source.Height != destination.Height) || (source.PixelFormat != destination.PixelFormat))
    {
        return false;
    }

    int bitdepth_per_pixel = Bitmap.GetPixelFormatSize(source.PixelFormat) / 8;

    if (bitdepth_per_pixel != 1 && bitdepth_per_pixel != 3 && bitdepth_per_pixel != 4)
    {
        return false;
    }

    BitmapData source_bitmapdata = null;
    BitmapData destination_bitmapdata = null;

    try
    {
        source_bitmapdata = source.LockBits(new Rectangle(0, 0, source.Width, source.Height), ImageLockMode.ReadWrite,
                                        source.PixelFormat);
        destination_bitmapdata = destination.LockBits(new Rectangle(0, 0, destination.Width, destination.Height), ImageLockMode.ReadWrite,
                                        destination.PixelFormat);

        int source_bitmapdata_bitdepth_width = source_bitmapdata.Width * bitdepth_per_pixel;
        int source_bitmapdata_height = source_bitmapdata.Height;
        int source_bitmapdata_bitdepth_stride = source_bitmapdata.Stride;

        unsafe
        {
            byte* source_ptr = (byte*)source_bitmapdata.Scan0;
            byte* destination_ptr = (byte*)destination_bitmapdata.Scan0;

            int offset = source_bitmapdata_bitdepth_stride - source_bitmapdata_bitdepth_width;

            for (int i = 0; i < source_bitmapdata_height; i++)
            {
                for (int j = 0; j < source_bitmapdata_bitdepth_width; j++, source_ptr++, destination_ptr++)
                {
                    *destination_ptr = *source_ptr;
                }

                source_ptr += offset;
                destination_ptr += offset;
            }
        }

        source.UnlockBits(source_bitmapdata);
        destination.UnlockBits(destination_bitmapdata);

        return true;
    }
    catch { return false; }
}