Bitmap Source from memory

Question

Hi, how to create a bitmap source from a memory buffer, I need an IWICBitmapSource  and not an IWICBitmap, for performance reasons I don't want copy the memory buffer.

Do i need to implement my own custom bitmap source (any Sample links ?) or is there an easier way ?

thanks.

Answer 1

private BitmapImage GetImageSource(byte[] imageBytes)
{
    using (InMemoryRandomAccessStream ms = new InMemoryRandomAccessStream())
    {
        using (DataWriter writer = new DataWriter(ms.GetOutputStreamAt(0)))
        {
            writer.WriteBytes(imageBytes);
            writer.StoreAsync().GetResults();
        }
 
        var image = new BitmapImage();
        image.SetSource(ms);
        return image;
    }
}

Answer 2

Thanks for your answer.. but It's not a XAML project, I don't work with the BitmapSource class, but with the underlying native interface IWICBitmapSource from the WIC API.

Answer 3

You may want to look at the source for DirectXTex which makes extensive use of WIC.

Typically if you want to create a WIC bitmap object using your own buffer, you'd use CreateBitmapFromMemory

Answer 4

For the moment I didn't find a better solution than using CreateBitmapFromMemory but this function involves a copy from the buffer to the bitmap, the same function with the WICBitmapNoCache flag would have been perfect.

Thanks.