R devel - Sep 2006 - JPEG struct mismatch on Intel Macs (PR#9209)

Full_Name: Phil Spector
Version: 2.3.1
OS: Mac OS X (Tiger)
Submission from: (NULL) (128.32.135.22)


Trying to close a jpeg() device on an Intel Mac causes the following:
> jpeg('out.jpg')
> plot(1:10)
> dev.off()
JPEG parameter struct mismatch: library thinks size is 372, caller expects 376
null device
          1
>

An empty jpg file is produced in 'out.jpg'
-                         

                                                   - Phil Spector
                                                     Statistical Computing
Facility
                                                     Department of Statistics
                                                     UC Berkeley

spector at stat.berkeley.edu writes:
> Full_Name: Phil Spector
> Version: 2.3.1
> OS: Mac OS X (Tiger)
> Submission from: (NULL) (128.32.135.22)
> 
> 
> Trying to close a jpeg() device on an Intel Mac causes the following:
> 
> > jpeg('out.jpg')
> > plot(1:10)
> > dev.off()
> JPEG parameter struct mismatch: library thinks size is 372, caller expects
376
> null device
>           1
> >
> 
> 
> An empty jpg file is produced in 'out.jpg'                
   
AFAICT, this wouldn't be a bug in R. Your version of R appears to
have been built with one version of the jpeg libraries and you have
another version installed. Unless we have a compiler issue and one
part is padding out to a multiple of 8 bytes.

-- 
   O__  ---- Peter Dalgaard             ?ster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)                  FAX: (+45) 35327907

On Sep 6, 2006, at 12:34 PM, Peter Dalgaard wrote:
> spector at stat.berkeley.edu writes:
>
>> Full_Name: Phil Spector
>> Version: 2.3.1
>> OS: Mac OS X (Tiger)
>> Submission from: (NULL) (128.32.135.22)
>>
>>
>> Trying to close a jpeg() device on an Intel Mac causes the following:
>>
>>> jpeg('out.jpg')
>>> plot(1:10)
>>> dev.off()
>> JPEG parameter struct mismatch: library thinks size is 372, caller  
>> expects 376
>> null device
>>           1
>>>
>>
>>
>> An empty jpg file is produced in 'out.jpg'
>
> AFAICT, this wouldn't be a bug in R. Your version of R appears to  
> have been built with one version of the jpeg libraries and you have  
> another version installed. Unless we have a compiler issue and one  
> part is padding out to a multiple of 8 bytes.
>
Although it's not a bug in R, it is a problem with the Mac binary  
which uses static libjpeg. I have re-compiled libjpeg for Intel Mac  
so tonight's nightly build should be ok.

Thanks,
Simon