复制代码 代码如下:
public Bitmap CopyBitmap(Bitmap source)
{
int depth = Bitmap.GetPixelFormatSize(source.PixelFormat);

if (depth != 8 && depth != 24 && depth != 32)
{
return null;
}

Bitmap destination = new Bitmap(source.Width, source.Height, source.PixelFormat);

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);

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

for (int i = 0; i < (source.Width * source.Height * (depth / 8)); i++)
{
*destination_ptr = *source_ptr;
source_ptr++;
destination_ptr++;
}
}

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

return destination;
}
catch
{
destination.Dispose();
return null;
}
}