[Closed] .net Metafile class?

The Imaging.Metafile class doesn’t do what you think it does. It has nothing to do with image EXIF data.

I don’t have any working code to share, but here is a link to give you a direction, provided you can convert the c# code to maxscript code:

http://www.developerfusion.com/article/84474/reading-writing-and-photo-metadata/

There are tools out there to do what you want like DCRaw and ExifTools, but both are command-line tools and not dotnet libraries. ExifTools is also available as a Perl Library, but I have no idea how you would go about using that with Maxscript.

-Eric

A c# library:

http://www.codeproject.com/Articles/11305/EXIFextractor-library-to-extract-EXIF-information

Sorry after I posted I did a little research and realised that this metafile class wasn’t exactly what I was looking for. Thanks lo for the links.

Here is what I have so far...

    -- Bitmap stream
    file=@"c:	est.jpg"
    FileMode=dotNetClass "System.IO.FileMode"
    FileAccess=dotNetClass "System.IO.FileAccess"
    FileShare=dotNetClass "System.IO.FileShare"
    BitmapStream = dotNetObject "System.IO.FileStream" file FileMode.Open FileAccess.ReadWrite FileShare.ReadWrite;
    
    --Jpeg bitmap decoder
    BitmapCreateOptions=dotNetClass "System.Windows.Media.Imaging.BitmapCreateOptions"
    BitmapCacheOption=dotNetClass "System.Windows.Media.Imaging.BitmapCacheOption"
    BitmapDecoder  = dotNetObject "System.Windows.Media.Imaging.JpegBitmapDecoder"   BitmapStream  BitmapCreateOptions.PreservePixelFormat  BitmapCacheOption.Default;
    

Show properties on the Bitmapdecoder now reveals a metadata property. I understand the metadata, in the case of a Jpeg image, is stored in Frame[0]

   Jpegframe = bitmapdecoder.frames.Item[0]
   

However this seems to return an error

  -- Runtime error: dotNet runtime exception: Specified value of type 'System.Windows.Media.Imaging.BitmapFrameDecode' must have IsFrozen set to false to modify.
  

Any thoughts on where I may be going wrong?

Thanks,

D.

I think you’re still looking in the wrong place. Here’s an incomplete code block to get you started:

    thebmp = dotnetobject "system.drawing.bitmap" @"c:	est.jpg"
    asciiCls = (dotnetClass "System.Text.Encoding").ascii
	bCnv = (dotnetClass "System.BitConverter")
	for item in thebmp.propertyitems do
	(
		local l = item.len
		local v = item.value
		local displayValue = case item.type of
		(
			1:(v)
			2:(asciiCls.getString v 0 (l-1))
			3:(bCnv.ToUInt16 v 0)
			4:(bCnv.ToUInt32 v 0)
			7:(bCnv.ToInt32 v 0)
			default:(v)
			
			
		)
		format "ID:%	Type:%	Value:%
" item.id item.type displayValue
	)
	thebmp.dispose()

The following information will help you continue it:
http://msdn.microsoft.com/en-us/library/system.drawing.imaging.propertyitem.type.aspx
http://msdn.microsoft.com/en-us/library/ms534418(v=vs.85).aspx

Thanks Lo, looks like I was way off the mark. This seems to be closer to what I was looking for, will have a play around with this.