[poppler] Getting the image rects from a page

[Albert Astals Cid]

In kpdf we have a code in our custom outputdev that gets the image rectangle a 
image is using in the page, so when displaying it the user can right click on 
it and select "save image".

I'm in [slow] process of porting all our features to poppler so i can use the 
clean poppler-qt4 bindings. This mean i have to add the feature of getting 
the image rects to poppler.

How do you prefer i add this feature? 
I have thought of changing PDFDoc::displayPage and friends to accept a 
doImageRects parameter and then having a thing like PDFDoc::takeRects(), that 
is, following the same structure one uses for getting the links.

Do you guys agree with that?

Albert

		
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