How to put unmanaged CBitmap*->GetBitmapBits() into an BitmapSource-derivedclass

Hi all,

I know there are some discussions about getting byte[] from BitmapSource
and how to put byte[] into an BitmapSource through MemoryStream. I tried
a lot of this stuff and I dont't come far. My scenario is living in
C++/CLI and I want to put data from a CBitmap* (from CImageList e.g.)
into a BitmapSource object like BitmapImage for example. To achieve this
I tried the following ways:

1) I tried to use the
BitmapImage::Create( ... , System::IntPtr(pBuffer), ... ) method,
where buffer is a byte field. If I do this the app is crashing during
render-process with InvalidOperationException - "Object must be
initialized before operation can be performed"
Maybe some parameter is corrupt but Create is done!

2) I tried to use the approach from this newsgroup - posted in the very
past. BitmapImage.StreamSource is longing for a stream. I provide a
UnmanagedStreamSource initialized with the buffer from
CBitmap::GetBitmapBits(..). This working until I call
BitmapSource.EndInit(). There I get the following exception:
NotSupportedExcpetion "No codec found that can decode the specefic
file." Since this is raw bitmap data I cannot understand why there is
something to be decoded?! For what is the BitmapImage.SourceStream
lokking for? An encoded in memory buffer?!

3) I tried to use
System::Windows::Interop::Imaging::CreateBitmapSourceFromHBitmap, too.
without success. (If this would work, how does this method realize its
task?)

I really get frustrated with this Imaging stuff since there are NULL
information on the internet or in the newsgroups.

Please give me a hint how to perform such a scenario. Come on, I cannot
believe that I'm the only one with this task - there have to be some
examples approaches on the desks in Redmond?!

Thanks You so much.
Chris :-)

.... 15 minutes after the post I got approach 3 to work correctly. There were
some problems concerning the the palette parameter. As a result of this I
tried to cancel the previous post but without success (as You can see).
Anyway do You have a sample for approach 1 or 2 out there?

Thank You so much!
Chris :-)

"MueMeister" wrote:

> Hi all,
>
> I know there are some discussions about getting byte[] from BitmapSource
> and how to put byte[] into an BitmapSource through MemoryStream. I tried
> a lot of this stuff and I dont't come far. My scenario is living in
> C++/CLI and I want to put data from a CBitmap* (from CImageList e.g.)
> into a BitmapSource object like BitmapImage for example. To achieve this
> I tried the following ways:
>
> 1) I tried to use the
> BitmapImage::Create( ... , System::IntPtr(pBuffer), ... ) method,
> where buffer is a byte field. If I do this the app is crashing during
> render-process with InvalidOperationException - "Object must be
> initialized before operation can be performed"
> Maybe some parameter is corrupt but Create is done!
>
> 2) I tried to use the approach from this newsgroup - posted in the very
> past. BitmapImage.StreamSource is longing for a stream. I provide a
> UnmanagedStreamSource initialized with the buffer from
> CBitmap::GetBitmapBits(..). This working until I call
> BitmapSource.EndInit(). There I get the following exception:
> NotSupportedExcpetion "No codec found that can decode the specefic
> file." Since this is raw bitmap data I cannot understand why there is
> something to be decoded?! For what is the BitmapImage.SourceStream
> lokking for? An encoded in memory buffer?!
>
> 3) I tried to use
> System::Windows::Interop::Imaging::CreateBitmapSourceFromHBitmap, too.
> without success. (If this would work, how does this method realize its
> task?)
>
> I really get frustrated with this Imaging stuff since there are NULL
> information on the internet or in the newsgroups.
>
> Please give me a hint how to perform such a scenario. Come on, I cannot
> believe that I'm the only one with this task - there have to be some
> examples approaches on the desks in Redmond?!
>
> Thanks You so much.
> Chris :-)
>