[poppler] poppler get bounding box of whole content

[Mihai Niculescu]

mail list included. Replay below.

On 05/29/2013 11:39 PM, Albert Astals Cid wrote:
> El Dimecres, 29 de maig de 2013, a les 21:54:43, Mihai Niculescu va escriure:
>> Hi,
>>
>> I am trying to get the bounding box of all content in a page(text,
>> images, tables, etc) in poppler, but I can’t figure this out.
>> For example, I want to dublicate the result given by ghostscript:
>>
>>               gs -sDEVICE=bbox golfer.ps
>>
>>    prints out
>>
>>               %%BoundingBox: 0 25 583 732
>>
>>               %%HiResBoundingBox: 0.808497 25.009496 582.994503 731.809445
>>
>> How can this be done with poppler?
> Is that the "real" bounding box or one of the pdf boxes (crop, bleed, etc)?
>
> Cheers,
>    Albert
>
>> Thanks,
>> Mihai
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Not the pdf boxes. I mean the union of all bounding boxes of all 
elements (text, images, tables, glyphs, etc) in pdf. Let me explain more.

I tried to loop over all QList<TextBox> but these do not include other 
glyphs in the pdf (greek sigma - for summation in latex) or maybe 
poppler does not see it as a text:

   QList<Poppler::TextBox*> wholetext = pdfPage->textList();

     //float minX, maxX, minY, maxY;

     QRectF unitedTextbbox, textbbox;

     for(int i=0; i<wholetext.size(); ++i){

         Poppler::TextBox* textBox = wholetext.at(i);

         textbbox = textBox->boundingBox();

         if(i==0){

             unitedTextbbox=textbbox;

         }else{

             unitedTextbbox=unitedTextbbox.united(textbbox);

         }

     }


This works great when there is simple text in pdf, but when there are 
other symbols it does not.  I need something like the example above but 
to include all elements in the pdf. I'll go and use only poppler 
(without qt4 wrapper) if I can have this.

Cheers,
Mihai