[poppler] thumbnails

[Shawn Rutledge]

On Wed, May 20, 2009 at 1:33 PM, Albert Astals Cid <aacid at kde.org> wrote:
>> > Right, the Qt4 bindings don't expose thumbnail reading, if you'd like to
>> > have them, do you think you can contribute a patch?
>>
>> Probably I could, I'm familiar enough with Qt although haven't looked
>> at the implementation of those bindings yet.  Can you give a general
>> outline how to get the thumbnails using core?
>
> See loadThumb Page.h that should give you the data of the thumbnail, once you
> have it you just create a QImage with it and return it to the user.

So far the thumbnail images seem to be 24-bit RGB; I don't know if
that's always going to be true.  Here's a patch which makes the
assumption that they always will be.

I tested it by modifying the demo program to have a thumbnails dock
window, using the usual QTableView, which isn't so great because
QIcons in a QTableView are a rather tiny size by default, but at least
you can see that the thumbnails got generated correctly.  I will try
to use a QGraphicsView in my own program for that.
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