fastest/performance approach to send large managed Bitmap object to unmanaged/native function

Question

Hi to all,

I am excited to be a part of the forum :)
my first post !
I am posting this so that many can benefit from it.

My question: what is the fastest/performance approach to send large managed Bitmap object to unmanaged/native function ?

I will be using C++/CLI, (VS 2008, .NET 3.5) for that purpose

One Approach: pin_ptr
use pin_ptr instead of copying (Marshalling) pixel data of Bitmap object from managed to unmanaged for increasing performance / speed

Other Approach (specifically for Bitmap would be): unmanaged WPF Imaging Component.
If this is a better approach it would be great if someone could throw some light on it (some code) or give some pointers in this direction

Thanks

Answer 1

It isn't really clear what "send to native function" might mean. You shouldn't need much more than Bitmap::GetHbitmap() to get a HBITMAP handle. If you need a pointer to the raw pixel data then use Bitmap::LockBits().