How to work with animated GIF files with Graphics Mill

Those who worked with AVI Processor will find animated GIFs in Graphics Mill familiar. To read animated GIF files, you should use GifReader class, to save it - GifWriter. Each GIF frame is presented with GifFrame class. GifReader contains a collection of GifFrames. So to read GIF frames, you should just iterate through the collection either with For Each statement:

Dim objReader As New GifReader
objReader.OpenFile "c:\animagif.gif"

Dim objFrame As GifFrame
For Each objFrame In objReader.Frames
    objFrame.Bitmap.SaveToFile "c:\frame_" & objFrame.Index & ".gif"
Next
objReader.Close

or just get necessary frame by index:

If I < objReader.Frames.Count Then
  objReader.Frames(I).Bitmap.SaveToFile "c:\frame.gif"
End If

Writing animated GIF is a piece of cake too. You should create a frame or get it from GifReader and pass it to the AddFrame method:

Dim objReader As New GifReader
Dim objWriter As New GifWriter
Dim objFrame As GifFrame

objReader.OpenFile "c:\animagif.gif"
objWriter.OpenFile "c:\result.gif"
For Each objFrame In objReader.Frames
    objWriter.AddFrame objFrame
Next
objReader.Close
objWriter.Close

These code samples are pretty basic and they intended only to give an idea about capabilites of the Graphics Mill in processing of animated GIF files. More detailed code sample you can find in attachments.

If you have any problems with it, please feel free to let us know.

Edited by user Monday, December 24, 2007 6:20:09 PM(UTC)  | Reason: Not specified

File Attachment(s):

GraphicsMillAnimatedGifSample.zip (4kb) downloaded 96 time(s).

I can't read the animated gif

please help me !!!