Re: optimizing PNGs
On Sun, May 26, 2013 at 8:20 PM, Adam Borowski <kilobyte@angband.pl> wrote:
> On Sun, May 26, 2013 at 07:42:49PM +0200, Mathieu Malaterre wrote:
>> On Sun, May 26, 2013 at 5:56 PM, Adam Borowski <kilobyte@angband.pl> wrote:
>> > A while ago, someone raised the possibility of recompressing PNG files.
>> > Unlike xz, this would save space not only on mirrors but also on live
>> > installed systems. PNGs are nearly incompressible so this is mostly
>> > independent from xz.
>> >
>> > At least by number, there's a lot of PNG images:
>> [...]
>> > 22225 ns3-doc
>>
>> This one is slightly different and should be treated differently IMHO.
>> See `Subject: Ridiculously large packages`[1] on debian-cd, which got
>> solved using SVG output when generating doxygen documentation.
>
> Formats other than PNG might be more appropriate, yes.
>
>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=557238
>
> This one (vtk-doc) doesn't compress PNGs, but reduces their quality in a
> lossy way to 256 colours. And in this case, using optipng+advpng would
> reduce the files by more than a half (comparing sizes of .tar.xz).
True there are remainings PNGs in vtk-docs, as explained before, those
are latex equation.
I believe it would be even nicer when doxygen would support better
latex support and would generate something other than a poor-man
solution of PNGs for equations.
2cts
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