I set the compression back to what it was in 11.2, which is a 
compression of 2 on a 0 to 9 scale. It was intended to be that all 
along; I just had a bug in there that set it to 0.

Michal Bozon wrote:

>Bob Hanson wrote:
>  
>
>>Jmol 11.2 uses PNG compression 2 only
>>
>>Jmol 11.3 uses PNG compression 0 by default (that's a bug I will fix -- 
>>it is intended to be 2) but the -q switch intended for JPG quality is 
>>also setting PNG compression level. The acceptable range is 0 - 9, so 
>>it's just the wrong default value.
>>
>>    
>>
>
>Thanks, it works nice. Now I have also noticed that there was some discussion 
>about whether to compress PNGs or not by default. Deciding between slightly 
>larger processing time, and having much smaller (some 200x in my case) output 
>images, I'd vote for (at least nonzero level of) compression.
>
>
>  
>
>>The command line switch -q should set this:
>>
>>-q 1
>>-q 2
>>-q 9
>>
>>09/10/2007  09:28 PM           750,678 t.png  # default
>>09/10/2007  09:28 PM            35,003 t0.png # -q0
>>09/10/2007  09:28 PM            36,268 t1.png # -q1
>>09/10/2007  09:27 PM            29,781 t9.png # -q9
>>
>>So that appears to be working. All are gorgeous.
>>
>>
>>Bob
>>
>>Michal Bozon wrote:
>>
>>    
>>
>>>I have an additional question on this topic: non-interactively generated PNG 
>>>images are uncompressed. Is it possible to enable the compression somehow ?
>>>
>>> MB
>>>
>>>      
>>>
>
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-- 
Robert M. Hanson
Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr


If nature does not answer first what we want,
it is better to take what answer we get. 

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900



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