public LockBmp(Bitmap bmp)
{
_bmp = bmp;
_bmpdata = _bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height),
System.Drawing.Imaging.ImageLockMode.ReadWrite,
System.Drawing.Imaging.PixelFormat.Format32bppArgb);
_writeableBitmap = PixelFarm.DrawingBuffer.BitmapBuffer.Empty;
bufferLenInBytes = 0;
}
public PixelFarm.DrawingBuffer.BitmapBuffer GetWritableBitmap()
{
if (!_writeableBitmap.IsEmpty)
{
return(_writeableBitmap);
}
//
//create
bufferLenInBytes = _bmpdata.Stride * _bmpdata.Height;
int[] buffer = new int[bufferLenInBytes / 4];
System.Runtime.InteropServices.Marshal.Copy(_bmpdata.Scan0, buffer, 0, bufferLenInBytes / 4);
return(_writeableBitmap = new PixelFarm.DrawingBuffer.BitmapBuffer(_bmp.Width, _bmp.Height, buffer));
}
