Bugs item #896, was opened at 2007-12-29 21:00 You can respond by visiting: http://sarovar.org/tracker/?func=detail&atid=493&aid=896&group_id=106 Category: Image inclusion Group: v1.50.0-alpha Status: Open Resolution: Accepted Priority: 5 Submitted By: Jim Diamond (zsd) Assigned to: Martin Schröder (oneiros) Summary: including an image (pdf or png) with transparency messes up other colours on that page Initial Comment: Download http://www.libpng.org/pub/png/img_png/stefan_255_rgba.png (which has a transparent background) and run it through png2pdf as follows: png2pdf -i stefan_255_rgba.png stefan_255_rgba-i.pdf png2pdf -a stefan_255_rgba.png stefan_255_rgba-a.pdf png2pdf stefan_255_rgba.png stefan_255_rgba-neither.pdf Then run the following through pdflatex (pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)) \documentclass{beamer} \mode<presentation> { \usetheme{Madrid} \setbeamercovered{transparent} } \usepackage{ifpdf} \usepackage{graphicx} \usepackage{color} \ifpdf \hypersetup{% pdfpagemode=FullScreen, pdfpagetransition={Wipe /Di 0 /D 0.5} } \fi \title[Beamer and png2pdf]{Using png2pdf with the beamer class} \author[Krause]{D.~Krause} \subject{png2pdf} \begin{document} \beamertemplateshadingbackground{yellow!50}{magenta!50} \begin{frame} \frametitle{NO Image over background} This is some text \end{frame} \begin{frame} \frametitle{Original stefan... png image over background} \includegraphics{stefan_255_rgba.png}% \end{frame} \begin{frame} \frametitle{png2pdf -a stefan... image over background} \includegraphics{stefan_255_rgba-a.pdf}% \end{frame} \begin{frame} \frametitle{png2pdf -i stefan... image over background} \includegraphics{stefan_255_rgba-i.pdf}% \end{frame} \begin{frame} \frametitle{png2pdf stefan... over background} \includegraphics{stefan_255_rgba-neither.pdf}% \end{frame} \end{document} Now look at the resulting PDF (attached) with Acroread 7.0.9 or 8.1.1 on Linux. On the page which includes the PNG and also on the page which includes the png2pdf -a version, the other colours on the page are messed up somewhat. This also happens on Acroread 8.? running on Windoze xp under vmware, although it seems a bit less noticeable. There is no apparent problem when looking at the file with xpdf or kpdf (Slackware 12.0 Linux). It's not clear to me whether this is an acroread bug or a pdftex bug, but Martin Schröder suggested I open a bug here. Cheers. Jim ----------------------------------------------------------------------

Comment By: Martin Schröder (oneiros) Date: 2007-12-31 16:07

Message: Logged In: YES user_id=421 Our contact at adobe confirms that pages with transparent objects on them (like pngs) must have a /Group entry in the /Page object. I'll fix that next year. ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-12-29 22:05 Message: Logged In: YES user_id=421 This is not related to #764, as there are no page Groups. It also happens only with the png or rgba-a. I'll ask our contact at Adobe. ---------------------------------------------------------------------- Comment By: Jim Diamond (zsd) Date: 2007-12-29 22:03 Message: Logged In: YES user_id=4814 I just d/l'ed and compiled pdftex Version 3.141592-1.40.5 (Web2C 7.5.6) The pdf files (1.40.3 and 1.40.5 versions) are slightly different (when compared as text) but when viewed with acroread 7.0.9 they look identical (as far as my eyes can tell). ---------------------------------------------------------------------- Comment By: Jim Diamond (zsd) Date: 2007-12-29 21:15 Message: Logged In: YES user_id=4814 Done ---------------------------------------------------------------------- Comment By: Martin Schröder (oneiros) Date: 2007-12-29 21:08 Message: Logged In: YES user_id=421 Please attach the pdfs from png2pdf. ---------------------------------------------------------------------- You can respond by visiting: http://sarovar.org/tracker/?func=detail&atid=493&aid=896&group_id=106