PngBitmapEncoder and Opacity problem

[JC]

Hello Guys

I have a problem when I encode a image in png.
I use a OpenFileDialog and call this method after : 

public static byte[] EncodeToPng(BitmapSource bitmap)
{
  byte[] retval;
  using (MemoryStream stream = new MemoryStream())
  {
    var encoder = new PngBitmapEncoder();
    encoder.Frames.Add(BitmapFrame.Create(bitmap));
    encoder.Save(stream);
    retval = stream.ToBytes();
  }
  return retval;
}

I need a byte[] to send it to my server with RIA services ... but that's not the problem

So when I bind my <Image> control to my byte array, I use an IValueConverter which call this method :

public static BitmapImage ToBitmapImage(this byte[] buffer)
{
  BitmapImage imageMateriel = new BitmapImage();
  imageMateriel.SetSource(new MemoryStream(buffer));
  return imageMateriel;
}

And it working :) BUT when I take a PNG file with opacity ... image rendenring is gray !
You can get my test file here : http://www.alfileo.fr/images/logo.png
And my result file in the attached file on this post

Can you try it please ?
Best regards

JC

[Andrey]

Hello JC,

Thank you for information.
We have reproduced the problem with transparent image for rendering using PNG-encoder. Unfortunately it will take significant time to research into the problem.

We have created the PITS issue to fix this problem in future releases.
You can track it using the following link:
http://www.telerik.com/support/pits.aspx#/public/silverlight/3900

Sincerely yours,
Andrey Murzov
the Telerik team

[JC]

Glad to help to find bugs ;-)
I do himself some research and I knew it was complicated ... Good luck to find

PS : I've won any telerik point to this ?

Thanks 

[Giuseppe]

Hello JC,

We have updated your Telerik points for reporting this issue.


Best wishes,
Freddie
the Telerik team

[Abdul]

Are there any updates regarding the issue? I am running into the same bug and this is blocking me. I can't have images with gray color instead of transparent.

[Andrey]

Hello Abdul,

Unfortunately the problem is not solved yet. We already have the PITS for this issue:
http://www.telerik.com/support/pits.aspx#/public/silverlight/3900
 
One of the major criteria for prioritizing feature development is the number of customers' votes in our PITS and you can cast your vote for this issue.

Best wishes,
Andrey Murzov
the Telerik team

[FENWICK]

Hello,

Do you have Solved the bug ?
Are you working on this bug ?


thanks to your reply.