[Rd] tcltk image reading problem (on a mac?): [tcl] encountered an unsupported criticial chunk type "eXIf"

[Simon Urbanek]

Wayne,

that one is unrelated, but interesting - you can fix it with 

sudo install_name_tool -change \
  /usr/local/lib:/opt/X11/lib/libtk8.6.dylib \
  /usr/local/lib/libtk8.6.dylib \
  /usr/local/bin/wish8.6 

There is a bug in tcltk with IDs on the libraries which I have worked-around for R, but not for wish.

Back to the original question - do you have any example of a file that doesn't work so I could test? Exif chunks are fairly rare in PNG and are a more late extension so I couldn't find any examples.

Thanks,
Simon


> On 12/06/2020, at 12:24 PM, Wayne Oldford <rwoldford using uwaterloo.ca> wrote:
> 
> I don't know what has changed with Catalina
> 
> But I just tried my tk console from the shell command tkcon 
> And got the following error. 
> Here is my shell:
> 
> $ tkcon 
> 
>  dyld: Library not loaded: /usr/local/lib:/opt/X11/lib/libtk8.6.dylib
>      Referenced from: /usr/local/bin/wish
>      Reason: image not found
>    Abort trap: 6
> 
> 
> I don't know whether this is a red herring or not, but the 
> Console fails to boot.
> 
> John does it work for you?
> 
> Not sure whether Python has the same trouble.  Kind of old info at https://www.python.org/download/mac/tcltk/ 
> 
> 
> 
> 
> -----Original Message-----
> From: "Fox, John" <jfox using mcmaster.ca>
> Date: Thursday, June 11, 2020 at 7:54 PM
> To: Wayne Oldford <rwoldford using uwaterloo.ca>
> Cc: Peter Dalgaard <pdalgd using gmail.com>, "r-devel using r-project.org" <r-devel using r-project.org>
> Subject: Re: [Rd]  tcltk image reading problem (on a mac?): [tcl] encountered an unsupported criticial chunk type "eXIf"
> 
>    Dear Wayne and Peter,
> 
>    FWIW, I observe exactly the same problem in Catalina. The error and my session info:
> 
>    -------- snip --------
> 
>> tkimage.create("photo", file = fname)
>    Error in structure(.External(.C_dotTclObjv, objv), class = "tclObj") : 
>      [tcl] encountered an unsupported criticial chunk type "eXIf".
> 
>> sessionInfo()
>    R version 4.0.0 (2020-04-24)
>    Platform: x86_64-apple-darwin17.0 (64-bit)
>    Running under: macOS Catalina 10.15.5
> 
>    Matrix products: default
>    BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
>    LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib
> 
>    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] tcltk     stats     graphics  grDevices utils     datasets  methods   base     
> 
>    loaded via a namespace (and not attached):
>    [1] compiler_4.0.0 tools_4.0.0   
> 
>    -------- snip --------
> 
>    This is from RStudio but I see the same thing in the R.app.
> 
>    I hope this is of some help,
>     John
> 
>     -----------------------------
>      John Fox, Professor Emeritus
>      McMaster University
>      Hamilton, Ontario, Canada
>      Web: http::/socserv.mcmaster.ca/jfox
> 
>> On Jun 11, 2020, at 6:43 PM, Wayne Oldford <rwoldford using uwaterloo.ca> wrote:
>> 
>> Yes.
>> I seem to be picking up
>> <Tcl>  8.6
>> I should have noted that.
>> 
>> Use to work for me too in Mojave.
>> I have the sneaky feeling that Catalina is the problem.
>> 
>> R. W. Oldford
>> 
>> https://math.uwaterloo.ca/~rwoldfor
>> 
>> ________________________________
>> From: Peter Dalgaard <pdalgd using gmail.com>
>> Sent: Thursday, June 11, 2020 5:56:15 PM
>> To: Wayne Oldford <rwoldford using uwaterloo.ca>
>> Cc: r-devel using r-project.org <r-devel using r-project.org>
>> Subject: Re: [Rd] tcltk image reading problem (on a mac?): [tcl] encountered an unsupported criticial chunk type "eXIf"
>> 
>> Happy enough for me on Mojave.
>> 
>> On the off chance that you are picking up an old Tcl, do you see this?
>> 
>>> tcl("info","tclversion")
>> <Tcl> 8.6
>> 
>> 
>> -pd
>> 
>>> On 11 Jun 2020, at 23:04 , Wayne Oldford <rwoldford using uwaterloo.ca> wrote:
>>> 
>>> Hello everyone
>>> 
>>> I am not sure when this appeared
>>> (sometime post R 3.5.0 and after I switched to Mac OS Catalina).
>>> 
>>> I do not think it happens on all platforms (e.g. seems to work on windows).
>>> 
>>> But it seems that
>>> 
>>>    tkimage.create()
>>> 
>>> no longer works on a Mac for all png files.
>>> 
>>> 
>>> (It does work for *some* old png files I have on disk but I have not been able to determine what is different about the ones that work)
>>> 
>>> Any help would be appreciated.
>>> 
>>> - Wayne
>>> 
>>> 
>>> R.W. Oldford
>>> math.uwaterloo.ca/~rwoldfor
>>> 
>>> 
>>> 
>>> 
>>>> library(tcltk)
>>> 
>>>> fname <- "Rplot.png"
>>>> png(filename = fname, width = 500, height = 500)
>>>> hist(rnorm(20))
>>>> dev.off()
>>> 
>>>> tkimage.create("photo", file = fname)
>>> 
>>> Error in structure(.External(.C_dotTclObjv, objv), class = "tclObj") :
>>> [tcl] encountered an unsupported criticial chunk type "eXIf".
>>> 
>>> 
>>> ______________________________
>>> 
>>>> R.version
>>>             _
>>> platform       x86_64-apple-darwin17.0
>>> arch           x86_64
>>> os             darwin17.0
>>> system         x86_64, darwin17.0
>>> status
>>> major          4
>>> minor          0.0
>>> year           2020
>>> month          04
>>> day            24
>>> svn rev        78286
>>> language       R
>>> version.string R version 4.0.0 (2020-04-24)
>>> nickname       Arbor Day
>>> 
>>> ___________________________
>>> 
>>> macOS Catalina V 10.15.5
>>> 
>>> ___________________________________________________
>>> 
>>> 
>>>      [[alternative HTML version deleted]]
>>> 
>>> ______________________________________________
>>> R-devel using r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-devel
>> 
>> --
>> Peter Dalgaard, Professor,
>> Center for Statistics, Copenhagen Business School
>> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
>> Phone: (+45)38153501
>> Office: A 4.23
>> Email: pd.mes using cbs.dk  Priv: PDalgd using gmail.com
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 	[[alternative HTML version deleted]]
>> 
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> 
> 
> 
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