[tex-k] libpoppler support in TeX Live source tree

[Norbert Preining]

Hi Thanh,

On Di, 05 Mai 2009, The Thanh Han wrote:
> this sounds very similar to a patch I made to xpdf, to
> support object stream for pdftosrc. Below I copied the
> relevant text I sent in a previous mail to Peter and others.

Ahhhhhh, that explains loads of things, especially why it didn't show up
in poppler.

> I suggested to remove support for object stream from
> pdftosrc (or remove pdftosrc), so that we can get rid of
> this patch. But Peter and Karl don't think it's a good idea.
> So we need to maintain this patch for both xpdf and poppler
> it seems.

I leave that to them, cannot (since I never used pdftosrc) decide on it.

> Another workaround is to maintain a separate tree for
> pdftosrc; this patch would be applied to a (temporary)
> XRef.cc & XRef.h during compilation of pdftosrc. Sounds a
> bit awkward, but IMO better than changing the original
> XRef.{cc,h}.

What about the patch I proposed that, when compiling with poppler
(or/and maybe also with xpdf) instead of including XRef.h we include the
fixed version of it? I must honestly say I don't know what are the
consequences of *NOT* having the .cc part of the patch applied:

> | @@ -80,6 +106,7 @@
> |    nObjects = 0;
> |    objs = NULL;
> |    objNums = NULL;
> | +  offsets = NULL;
> |
> |    if (!xref->fetch(objStrNum, 0, &objStr)->isStream()) {
> |      goto err1;
> | @@ -100,6 +127,7 @@
> |      goto err1;
> |    }
> |    first = obj1.getInt();
> | +  firstOffset = objStr.getStream()->getBaseStream()->getStart() + first;
> |    obj1.free();
> |    if (first < 0) {
> |      goto err1;
> | @@ -121,7 +149,7 @@
> |        obj1.free();
> |        obj2.free();
> |        delete parser;
> | -      gfree(offsets);
> | +//       gfree(offsets);
> |        goto err1;
> |      }
> |      objNums[i] = obj1.getInt();

etc

> This change is "nice-to-have", but not a critical one.

So is there a chance to have that "feature" only for the version
compiled with the patched xpdf in the texlive tree, and a version
without that "feature" when compiled with poppler? That would be another
option.

Best wishes

Norbert

-------------------------------------------------------------------------------
Dr. Norbert Preining <preining at logic.at>        Vienna University of Technology
Debian Developer <preining at debian.org>                         Debian TeX Group
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