public DirectBitmap(Bitmap bmp)
{
Bitmap _disposelater = null;
if (bmp.PixelFormat == PixelFormat.Format32bppRgb)
{
var newBmp = new Bitmap(bmp);
bmp = _disposelater = newBmp.Clone(new Rectangle(0, 0, newBmp.Width, newBmp.Height), PixelFormat.Format32bppArgb);
newBmp.Dispose();
}
if (bmp.PixelFormat != PixelFormat.Format24bppRgb && bmp.PixelFormat != PixelFormat.Format32bppArgb)
{
throw new InvalidOperationException(nameof(bmp.PixelFormat));
}
var pixelformat = bmp.PixelFormat == PixelFormat.Format32bppRgb ? PixelFormat.Format32bppArgb : bmp.PixelFormat;
var bdata = bmp.LockBits(new Rectangle(0, 0, Width = bmp.Width, Height = bmp.Height), ImageLockMode.ReadWrite, pixelformat);
try {
Bits = new byte[bdata.Stride * bdata.Height];
Copying.MemCopy(bdata.Scan0, Marshal.UnsafeAddrOfPinnedArrayElement(Bits, 0), bdata.Stride * bdata.Height);
} finally {
bmp.UnlockBits(bdata);
}
BitsHandle = GCHandle.Alloc(Bits, GCHandleType.Pinned);
switch (pixelformat)
{
case PixelFormat.Format24bppRgb:
Bitmap = new Bitmap(bmp.Width, bmp.Height, bmp.Width * 3, pixelformat, BitsHandle.AddrOfPinnedObject());
break;
case PixelFormat.Format32bppArgb:
Bitmap = new Bitmap(bmp.Width, bmp.Height, bmp.Width * 4, pixelformat, BitsHandle.AddrOfPinnedObject());
break;
default:
throw new InvalidOperationException(nameof(bmp.PixelFormat));
}
Scan0 = Marshal.UnsafeAddrOfPinnedArrayElement(Bits, 0);
unsafe {
_scan0 = (byte *)Scan0.ToPointer();
}
_disposelater?.Dispose();
}
/// <summary>
/// Raises the Copying event</summary>
/// <param name="e">Event args</param>
protected virtual void OnCopying(EventArgs e)
{
Copying.Raise(this, e);
}
