Albert, Thanks a lot for clarifying! So is there any function that I can know the positions of intrinsic images in a pdf? I just want to find a way to take out those images. Do you have any suggestions?
Also, what is an OKULAR_OBSERVER_ID? I don't quite understand the mechanism behind it. I used 6 in my case and it works fine but when I'm using 77 it doesn't work at all. What number am I supposed to use? > Message: 4 > Date: Thu, 07 Mar 2013 11:47:19 +0100 > From: Albert Astals Cid <aa...@kde.org> > To: Okular development <okular-devel@kde.org> > Subject: Re: [Okular-devel] how to get images from pdf files? > Message-ID: <9667157.6NtSr88zM4@xps> > Content-Type: text/plain; charset="iso-8859-1" > > El Dijous, 7 de mar? de 2013, a les 00:12:10, Haidong Tang va escriure: > > Hi, > > Hi > > > I'm testing some functionalities on Okular and currently I'm working on > > getting images from a pdf files. I tried to use requestPixmaps( const > > QLinkedList<PixmapRequest*> &requests ) in the class Document to request > > image asynchronously and then use _o_nearestPixmap to get the images when > > they are ready. However, the images I got by using this method are not > > really what I want. This method may give me an image of the whole page, > but > > actually I'm only interested in those intrinsic images embedded in a > page, > > not a whole page converted into a image. Am I using the wrong function > for > > this task? Are there other more proper functions for my task? Thanks! > > There's no method that does what you want in the Okular API. You're > welcome to > draft the API for it if you need it and think the backends can implement > it. > > Cheers, > Albert > >
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