roland donat wrote:
It seems that you are right Bulia. The problem comes from my PDF viewver. I don't now why but it works with acroread today... But with xpdf, the problem persists. I will focus my investigation on the difference between xpdf and its child gpdf!
I don't know the history of the projects, but I would assume that if gpdf is a fork of xpdf, then it was a port to the GTK graphics library, right?
In general, I believe the attraction to toolkits like GTK is that they are more powerful, better rendering libraries, so the problem may be between the drawing routines and the library functions called, rather than in the interpretation of the PDF (i.e. xpdf "knows" what it wants to draw, but can't, because the graphics library is limited?).
But of course, I'm only speculating. I too have noticed problems with xpdf, especially with transparency and overlapping PDF elements, relative to gpdf. Unfortunately, I still have to use xpdf a lot, because it can grab text (I think it's the only free PDF viewer with that feature).
In fact, in light of the Linux Printing organization's desire to embrace PDF as "the new Postscript", I find the state of free PDF viewers to be pretty sad. I actually had to download acroread a few days ago in order to verify the internal structure of PDFs I was generating (things like what fonts were included, etc). Seems like one of the industry stakeholders ought to put some effort behind that, if they really like PDF that much.
Cheers, Terry