Gdiplus::Image from byte array

Question

I'm executing dcraw and using an anonymous pipe to pipe it to a char array.

My question is how can I create a Gdiplus::Image object from a char array containing the jpeg image? Without writing and reading it from the disk.

tenfour · Accepted Answer · 2012-07-25 20:45:32Z

3

You can create a Gdiplus::Bitmap from an IStream source. There are built-in Windows APIs that can do this for you - see CreateStreamOnHGlobal. Another way is to write your own class that implements IStream.

Here is an example using CreateStreamOnHGlobal to load PNG resources from memory.

answered Jul 25, 2012 at 20:45

tenfour

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Danil · Accepted Answer · 2016-09-05 16:26:49Z

1

    CByteArray byteArr;

    //fullfill byteArr
    COleStreamFile stream;
    if(!stream.CreateMemoryStream(NULL))
    {
        return;
    }
    stream.Write(byteArr.GetData(), byteArr.GetSize());
    stream.SeekToBegin();
    m_pSnapShot.reset(::new Gdiplus::Image(stream.GetStream( )));

answered Sep 5, 2016 at 16:26

Danil

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