[poppler] About my getText patch

[Kristian Høgsberg]

Albert Astals Cid wrote:
> I have realised it has either a bad comment or bad
> code, because the comment on Poppler::Rectangle says
> the coordinates have to be on PDF system but then they
> are not handled like that, it should have a 
> 
>  y1 = height - rect->y2;
>  y2 = height - rect->y1;

Yeah, we have that conversion in the glib bindings a couple of places 
because the xpdf is internally inconsistent.  The text output device and 
all functionality based on it use coordinates with (0,0) being the upper 
left corner (screen coordinates).  In the glib wrapper we wanted to 
present a consistent coordinate system, so we need to convert those 
coordinates to normal PDF coordinates.

I think it's kind of arbitrary which coordinate system you choose, and 
if you want to present consistent coordiates in the wrapper, you need to 
convert in one place or the other anyway.  Given that the PDF standard 
specifies a system with (0,0) in the lower left corner I think it makes 
sense to stick with that, though.

cheers,
Kristian