Re: Why is it that png files are not dependable over the long haul

shows in chrome too... 1.7.0b89 fails
(errors from error callback)
IDAT: invalid distance too far back
Too many calls to png_read_row

(lots of too many calls to png_read_row)

and fails in 1.6.34 (infinte reports of)  (chrome is also on 1.6.34,zlib
1.2.11 )
IDAT: invalid distance too far back

(I have patches so simple things like 'invalid sRGB profile' doesn't cause
my program to abort)

fixing the infinite loop doesn't result in a valid image though.

still cloning the repo - don't know if there are custom patches applied...
otherwise there must be some setup option for reading that must not be right

or maybe in pngconf options...
https://github.com/chromium/chromium/blob/master/third_party/libpng/pnglibconf.h#L140




On Wed, Aug 1, 2018 at 12:21 AM Ruben Safir <ruben-v1XHP5QhJixWk0Htik3J/[email protected]> wrote:

> When PNG was created I enthusiatically preserved the majority of my
> family pictures as PNG files and they were lost because of bugs in the
> PNG libraries that were fixed.  I wrote aps to try to fix them as the
> stock optpng etc all could not fix them.
>
> Now this month we lost a whole new set of precious images to some change
> int he PNG libraries.
>
> Images like this:
>
>
> http://www.mrbrklyn.com/brooklyn/images/wall_art_river_and_metropolitian_avenue_williamsburg_2006_00578.png
>
> which is completely mangles in the gimp and imagemagik but viewaable in
> firefox?!?
>
> What are you guys doing.  I am going to have no choice but to abandon
> PNG.
>
> --
> So many immigrant groups have swept through our town
> that Brooklyn, like Atlantis, reaches mythological
> proportions in the mind of the world - RI Safir 1998
> http://www.mrbrklyn.com
>
> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
> http://www.nylxs.com - Leadership Development in Free Software
> http://www2.mrbrklyn.com/resources - Unpublished Archive
> http://www.coinhangout.com - coins!
> http://www.brooklyn-living.com
>
> Being so tracked is for FARM ANIMALS and and extermination camps,
> but incompatible with living as a free human being. -RI Safir 2013
>
>
>
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