[Rd] png cairo device problems on Mac 10.6.8

[Simon Urbanek]

On Jan 18, 2012, at 5:22 PM, Steven McKinney wrote:

> 
> Hi all,
> 
> I have been having problems generating png files on a Mac running OS X 10.6.8. 
> 
> Here's a simple example
> 
>> png("foo.png", type = "cairo"); plot(1:10); dev.off();
> null device 
>          1 
> libpng warning: Application built with libpng-1.2.26 but running with 1.5.2
> 
> The resultant file is of size 0 Kb.
> 
> Is this the proper place to report this issue?  Or should this
> be reported to r-sig-mac?
> 

yes


> If I run
> 
>> png("foo.png"); plot(1:10); dev.off();
> null device 
>          1 
> 
> I get a 16 Kb file with the appropriate plot.  (Odd, since the default type is "cairo".)
> 

No, the default is "quartz" unless you change it in your options.

On a similar note type="cairo-png" works as well.

The problem seems to be with R's configuration - for some mysterious reason it picks libpng12 flags even though cairo clearly includes libpng15 (and so does pkg-config). I'll need to dig a bit into that.

Cheers,
Simon


> Whenever I see the libpng warning, I end up with a 0 Kb file.
> 
> Details of R session below.
> 
> 
> Regards
> 
> Steve McKinney
> 
> 
> 
> R version 2.14.1 Patched (2012-01-11 r58090)
> Copyright (C) 2012 The R Foundation for Statistical Computing
> ISBN 3-900051-07-0
> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
> 
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> [R.app GUI 1.44 (5997) x86_64-apple-darwin9.8.0]
> 
> [History restored from /Users/stevenmckinney/.Rhistory]
> 
>> png("foo.png"); plot(1:10); dev.off();
> null device 
>          1 
>> png("foo.png", type = "cairo"); plot(1:10); dev.off();
> null device 
>          1 
> libpng warning: Application built with libpng-1.2.26 but running with 1.5.2
>> ?png
> starting httpd help server ... done
>> capabilities()
>    jpeg      png     tiff    tcltk      X11     aqua http/ftp  sockets   libxml     fifo 
>    TRUE     TRUE     TRUE     TRUE     TRUE     TRUE     TRUE     TRUE     TRUE     TRUE 
>  cledit    iconv      NLS  profmem    cairo 
>    TRUE     TRUE     TRUE     TRUE     TRUE 
>> png("foo.png"); plot(1:10); dev.off();
> null device 
>          1 
>> sessionInfo()
> R version 2.14.1 Patched (2012-01-11 r58090)
> Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
> 
> locale:
> [1] en_CA.UTF-8/en_CA.UTF-8/en_CA.UTF-8/C/en_CA.UTF-8/en_CA.UTF-8
> 
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base     
> 
> loaded via a namespace (and not attached):
> [1] tools_2.14.1
>> 
> 
> 
> Steven McKinney, Ph.D.
> 
> Statistician
> Molecular Oncology and Breast Cancer Program
> British Columbia Cancer Research Centre
> 
> email: smckinney +at+ bccrc +dot+ ca
> 
> tel: 604-675-8000 x7561
> 
> BCCRC
> Molecular Oncology
> 675 West 10th Ave, Floor 4
> Vancouver B.C.
> V5Z 1L3
> Canada
> 
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