* media-libs/netpbm Latest version available: 10.29 Latest version installed: 10.29 start gimp. create picture. draw some lines in different shades of gray. convert picture to grayscale colorspace, save it as "gray.png" erik@goofy:~bugrep$ identify -verbose gray.png gray.png PNG 420x300 420x300+0+0 PseudoClass 256c 3kb Image: gray.png Format: PNG (Portable Network Graphics) Geometry: 420x300 Class: PseudoClass Type: Grayscale Endianess: Undefined Colorspace: Gray <<<<<<<< SEE HERE Channel depth: Gray: 8-bits Channel statistics: Gray: Min: 0 (0) Max: 255 (1) Mean: 0.259048 (0.00101587) Standard deviation: 6.63757 (0.0260297) Colors: 256 Histogram: 928: ( 0, 0, 0) black 15: ( 1, 1, 1) #010101 **** snipped to make bugreport shorter **** but all colors have equal R,G,B values -> all gray 61: (252,252,252) grey99 122718: (255,255,255) white 99: (254,254,254) #FEFEFE Rendering-intent: Undefined Resolution: 28.35x28.35 Units: PixelsPerCentimeter Filesize: 3kb Interlace: None Background Color: white Border Color: #DFDFDF Matte Color: grey74 Page geometry: 420x300+0+0 Dispose: Undefined Iterations: 0 Compression: Zip Orientation: Undefined Comment: Created with The GIMP Signature: 69e3568437446a6c07bd1a0f70db955eb717e6f106f72cc0d612bd277bd809fa Tainted: False Version: ImageMagick 6.2.2 06/18/05 Q16 http://www.imagemagick.org now using netpbm-10.29: pngtopnm gray.png >gray_29 and using netpbm-10.28: pngtopnm gray.png >gray_28 erik@goofy:~/bugrep$ file gray_* gray_28: Netpbm PGM "rawbits" image data gray_29: Netpbm PPM "rawbits" image data erik@goofy:~/bugrep$ you see, once PPM, once PGM. manpage of pngtopnm implies that PGM should be created. so the behaviour of netpbm-10.29 is wrong here. ******** NEXT PROBLEM start gimp. create picture. draw some lines. convert picture to index colorspace, 2 colors, black and white. save it as "bw.png" erik@goofy:~/bugrep$ identify -verbose bw.png bw.png PNG 420x300 420x300+0+0 PseudoClass 2c 939 Image: bw.png Format: PNG (Portable Network Graphics) Geometry: 420x300 Class: PseudoClass Type: Bilevel Endianess: Undefined Colorspace: Gray Channel depth: Gray: 1-bits Channel statistics: Gray: Min: 0 (0) Max: 1 (1) Mean: 7.93651e-06 (7.93651e-06) Standard deviation: 0.00281717 (0.00281717) Colors: 2 Histogram: 9689: ( 0, 0, 0) black <<< SEE HERE, FULL BLACK 116311: (255,255,255) white <<< SEE HERE, FULL WHITE Rendering-intent: Undefined Resolution: 28.35x28.35 Units: PixelsPerCentimeter Filesize: 939 Interlace: None Background Color: white Border Color: #DFDFDF Matte Color: grey74 Page geometry: 420x300+0+0 Dispose: Undefined Iterations: 0 Compression: Zip Orientation: Undefined Comment: Created with The GIMP Signature: 8623b66fd24218b8e6162e504f6cef9d3f7bddb70f5761a5f7dd5f345fe83c77 Tainted: False Version: ImageMagick 6.2.2 06/18/05 Q16 http://www.imagemagick.org erik@goofy:~/bugrep$ here pngtopnm produces a PGM file in both netpbm 10.29 and 10.28. but the manpage of pngtopnm implies that a PBM should be generated instead. Reproducible: Always Steps to Reproduce: Portage 2.0.51.22-r3 (default-linux/x86/2005.0, gcc-3.3.6, glibc-2.3.5-r2, 2.6.12-gentoo-r10 i686) ================================================================= System uname: 2.6.12-gentoo-r10 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz Gentoo Base System version 1.6.13 ccache version 2.3 [enabled] dev-lang/python: 2.3.5-r2, 2.4.2 sys-apps/sandbox: 1.2.12 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.15.92.0.2-r10 sys-devel/libtool: 1.5.20 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=pentium4 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3.4/env /usr/kde/3.4/share/config /usr/kde/3.4/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib/mozilla/defaults/pref /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d" CXXFLAGS="-O2 -march=pentium4 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig ccache distlocks nostrip sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" LANG="de_DE" LINGUAS="de" MAKEOPTS="-j4" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 X alsa apm arts avi berkdb bitmap-fonts cdr crypt cups curl doc dvd eds emboss encode esd fam flac font-server foomaticdb fortran gd gdbm gif gimpprint gnome gphoto2 gpm gstreamer gtk gtk2 imagemagick imlib java jpeg kde ldap libg++ libwww mad mikmod motif mozilla mp3 mpeg ncurses nls ogg oggvorbis opengl oss pam pdflib perl plotutils png postgres ppds python qt quicktime readline samba scanner sdl slang spell ssl tcltk tcpd tetex tiff truetype truetype-fonts type1-fonts usb vorbis xine xml2 xmms xv zlib linguas_de userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LC_ALL, LDFLAGS, PORTDIR_OVERLAY
try netpbm-10.30
get back to us please
erik@goofy:~$ pngtopnm --version pngtopnm: Using libnetpbm from Netpbm Version: Netpbm 10.30.0 pngtopnm: Compiled Mi Okt 26 09:48:41 CEST 2005 by user "root" pngtopnm: BSD defined pngtopnm: RGB_ENV='RGBDEF' pngtopnm: RGBENV= 'RGBDEF' (env vbl is unset) erik@goofy:~/bugrep$ pngtopnm gray.png > gray_30 erik@goofy:~/bugrep$ file gray_* gray_28: Netpbm PGM "rawbits" image data << right gray_29: Netpbm PPM "rawbits" image data << wrong gray_30: Netpbm PPM "rawbits" image data << wrong erik@goofy:~/bugrep$ pngtopnm bw.png >bw_30 erik@goofy:~/bugrep$ file bw_* bw_28: Netpbm PGM "rawbits" image data << wrong bw_29: Netpbm PGM "rawbits" image data << wrong bw_30: Netpbm PGM "rawbits" image data << wrong erik@goofy:~/bugrep$
then post the actual images so we can try to reproduce
Created attachment 71505 [details] bw.png
Created attachment 71506 [details] gray.png
should re-open then
ok, i confirmed the behavior and e-mailed upstream about it
ok, upstream gave me a fix for the gray.png handling which ive added to 10.30-r1 upstream also pointed out that your bw.png is wrong ... it's an 8 bit grayscale PNG that just happens to have only black pixels and white pixels in it
