public unsafe void GetValue(BlockPtr blockPtr, IntPtr buffer)
{
if (this.BitIndex == 0)
{
WinApi.CopyMemory(buffer, blockPtr.value + this.Offset, this.Size);
if (this.IsReference)
{
IntPtr *p = (IntPtr *)buffer.ToPointer();
if (p[0] != IntPtr.Zero)
{
p[0] -= _ctx.ObjRefDiff;
}
}
}
else
{
var buff = new byte[this.Size];
Marshal.Copy(blockPtr.value + this.Offset, buff, 0, this.Size);
var rawValue = new BigInteger(buff);
var valueMask = BigInteger.Pow(2, this.BitsCount) - 1;
var value = (rawValue >> (this.BitIndex - this.BitsCount)) & valueMask;
var valueBytes = value.ToByteArray();
Marshal.Copy(valueBytes, 0, buffer, valueBytes.Length);
}
}
internal void Load(Bitmap image)
{
Empty(image.Width, image.Height);
int pixelCount = Size.Width * Size.Height;
IntPtr intsPointer = image.LockBits(new Rectangle(0, 0, Size.Width, Size.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb).Scan0;
GCHandle pixelsPointer = GCHandle.Alloc(Pixels, GCHandleType.Pinned);
try {
WinApi.CopyMemory(pixelsPointer.AddrOfPinnedObject(), intsPointer, (IntPtr)(pixelCount * 4));
} finally {
pixelsPointer.Free();
}
//image.UnlockBits();
}