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Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem

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On Tuesday, May 21, 2013 9:13:26 AM UTC-7, Rich Cook wrote:
> On Monday, May 20, 2013 10:15:46 PM UTC-7, sfeam wrote:
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> > Rich Cook wrote:
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> > > Hello, I am in charge of installing and maintaining gnuplot on our
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> > > clusters and am by no means an expert.  Our user has reported the
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> > > following is occurring:
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> > > gnuplot> plot 'test.png' binary filetype=png with rgbimage
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> > >          This copy of gnuplot cannot read png/gif/jpeg images
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> > > 
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> > > After googling a bit, I have looked in the build log for PNG entrails
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> > > and see the following:
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> > > checking for gdlib-config... /usr/bin/gdlib-config
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> > > checking for gdImageCreateTrueColor in -lgd... yes
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> > > checking gd.h usability... yes
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> > > checking gd.h presence... yes
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> > 
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> > > checking for gd.h... yes
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> > > checking for gdImageGif in -lgd... yes
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> > > checking for gdImageGifAnimBegin in -lgd... yes
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> > > checking for gdImageJpeg in -lgd... yes
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> > > checking for gdImageStringFT in -lgd... yes
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> > > checking for gdImagePng in -lgd... yes
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> > > 
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> > > ...
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> > > 
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> > >   jpeg terminal: yes
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> > >   gif terminal: yes (with animated gif)
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> > >   png terminal: yes
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> > >     (jpeg, gif and png terminals can use TTF fonts)
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> > >   pdf terminal: no (requires libpdf)
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> > > ...
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> > > 
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> > >   cairo-based pdf and png terminals: yes
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> > > I don';t understand why gnuplot thinks it cannot handle png files. 
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> > > Can someone help me debug this one? Thanks.
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> > That seems odd.  Please report the output from
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> >   gnuplot -e "show version long"
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> > There should be an entry  +GD_PNG
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> > If this is present then it indicates that indeed the program should
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> > be able to read png files.  If it's missing then I guess something
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> > must have gone wrong with the configure+build at a later stage after
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> > it had already reported that it was going to include png support.
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> > You might have a look in config.log for error messages that mention
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> > libgd. But really the info you show is self-contradictory so I
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> > don't have a good guess at what could be wrong.
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> > 	Ethan
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> The output seems confusing.  There is no +GD_PNG.  But there is -LIBGD.  I'm not sure where in the config.log or build process it decided to disable the PNG support. 
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> rcook@rzgpu2 (lclocal.el6): gnuplot -e "show version long" 
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>         G N U P L O T
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>         Version 4.6 patchlevel 1    last modified 2012-09-26 
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>         Build System: Linux x86_64
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>         Copyright (C) 1986-1993, 1998, 2004, 2007-2012
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>         Thomas Williams, Colin Kelley and many others
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> 
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>         gnuplot home:     http://www.gnuplot.info
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>         faq, bugs, etc:   type "help FAQ"
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>         immediate help:   type "help"  (plot window: hit 'h')
> 
> Compile options:
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> -READLINE  +LIBREADLINE  +HISTORY  
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> -BACKWARDS_COMPATIBILITY  +BINARY_DATA  
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> -LIBGD  
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> -USE_CWDRC  +X11  +X11_POLYGON  +MULTIBYTE  +X11_EXTERNAL +USE_MOUSE  +HIDDEN3D_QUADTREE  
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> +DATASTRINGS  +HISTOGRAMS  +OBJECTS  +STRINGVARS  +MACROS  +IMAGE  +USER_LINETYPES +STATS 
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> GNUPLOT_DRIVER_DIR = "/usr/local/tools/gnuplot-4.6.1/libexec/gnuplot/4.6"
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> GNUPLOT_PS_DIR     = "/usr/local/tools/gnuplot-4.6.1/share/gnuplot/4.6/PostScript"
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> HELPFILE           = "/usr/local/tools/gnuplot-4.6.1/share/gnuplot/4.6/gnuplot.gih"

I also see this in config.log:  

GDLIB_CONFIG='/usr/bin/gdlib-config'

And so I tried this: 

rcook@rzgpu2 (dpkg-mkdeb.GMTn7fiHG9): /usr/bin/gdlib-config --features
GD_XPM GD_JPEG GD_FONTCONFIG GD_FREETYPE GD_PNG GD_GIF GD_GIFANIM GD_OPENPOLYGON

So the libgd that gnuplot is using has PNG support, I think.  

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Thread

"This copy of gnuplot cannot read png/gif/jpeg images" problem Rich Cook <wealthychef@gmail.com> - 2013-05-20 19:15 -0700
  Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem Rich Cook <wealthychef@gmail.com> - 2013-05-20 19:17 -0700
  Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem sfeam <sfeam@users.sourceforge.net> - 2013-05-20 22:15 -0700
    Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem Rich Cook <wealthychef@gmail.com> - 2013-05-21 09:13 -0700
      Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem Rich Cook <wealthychef@gmail.com> - 2013-05-21 09:16 -0700
        Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem Rich Cook <wealthychef@gmail.com> - 2013-05-21 09:49 -0700
      Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem sfeam <sfeam@users.sourceforge.net> - 2013-05-21 11:52 -0700
        Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem Rich Cook <wealthychef@gmail.com> - 2013-05-23 09:44 -0700
  Re: "This copy of gnuplot cannot read png/gif/jpeg images" problem ab <ab.3942@googlemail.com> - 2013-05-22 00:20 -0700

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