[Poppler-bugs] [Bug 16999] New: pdfimages extracts bitmaps with color inversed, reloaded!

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=16999

           Summary: pdfimages extracts bitmaps with color inversed,
                    reloaded!
           Product: poppler
           Version: unspecified
          Platform: Other
               URL: http://www.cs.umd.edu/~gaburici/a8bug/page1orig+crop.pdf
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: gaburici at cs.umd.edu


I see this has been "fixed" in bug 12121, but the fix doesn't work for me for
the pdf linked the URL. More precisely, pdfimages from xpdf 3.02 works
correctly but the one from poppler 0.8.5 does not. The troublesome spot is in
ImageOutputDev, the 300 version is from poppler:

diff -up poppler-0.8.5/poppler-0.8.5/utils/ImageOutputDev.cc.300
poppler-0.8.5/poppler-0.8.5/utils/ImageOutputDev.cc.302
--- poppler-0.8.5/poppler-0.8.5/utils/ImageOutputDev.cc.300     2008-03-26
21:38:52.000000000 +0200
+++ poppler-0.8.5/poppler-0.8.5/utils/ImageOutputDev.cc.302     2007-02-28
00:05:52.000000000 +0200
@@ -152,5 +150,5 @@ void ImageOutputDev::drawImage(GfxState
     // copy the stream
     size = height * ((width + 7) / 8);
     for (i = 0; i < size; ++i) {
-      fputc(str->getChar(), f);
+      fputc(str->getChar() ^ 0xff, f);
     }

BTW, there's also a difference in how jpegs are handled in ImageOutputDev
between xpdf 3.02 and poppler 0.8.5, but I don't know whether it can cause any
problems.


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